阅读说明：本技术 一种电控式发动机制动装置 (A kind of electric-controlled type engine braking apparatus ) 是由 俞黎明 俞振寰 于 2019-06-27 设计创作，主要内容包括：一种电控式发动机制动装置。其特征在于：包括电动控制机构,其至少包括一个活动设置在辅助摇臂上的顶块,所述顶块具有前端与排气摇臂之间保持一定制动间隙的第一位置以及前端能与排气摇臂相接触实现制动功能的第二位置。其优点在于设置电动控制机构替代现有采用机油作为工作或驱动控制介质,消除机油带来的可靠性风险,增加发动机制动使用区域,减少发动机制动进入及退出时间,降低燃油消耗,使发动机制动性能分级更细化。(A kind of electric-controlled type engine braking apparatus.It is characterized by comprising electric control mechanisms, it includes at least a jacking block being movably arranged on auxiliary rocker arm, and the jacking block, which has, to be kept the first position of certain brake clearance and front end that can be in contact with exhaust rocker arm realizing the second position of braking function between front end and exhaust rocker arm.The advantage is that setting electric control mechanism substitution is existing uses machine oil as work or drive control medium, eliminate machine oil bring security risk, increase engine braking using area, it reduces engine braking and enters into and exits from the time, fuel consumption is reduced, refines engine braking performance classification more.)

1. a kind of electric-controlled type engine braking apparatus, including

Exhaust valve (1)；

Rocker arm shaft (2)；

Camshaft (3) is arranged in parallel with rocker arm shaft (2), and has the exhaust cam (31) being adjacently positioned and auxiliary cam (32)；

Exhaust rocker arm (4) is rotatably installed on rocker arm shaft (2), and front end and exhaust valve (1) correspondence contacts, its rear end and The corresponding contact of exhaust cam (31)；

Auxiliary rocker arm (5) is rotatably installed on rocker arm shaft (2), and is disposed adjacent with exhaust rocker arm (4), its rear end with it is auxiliary Help cam (32) corresponding；

Auxiliary rocker arm (5) can be pushed down and be in contact with auxiliary cam (32) by elastic component (6)；

It is characterized by also including electric control mechanism (7), include at least one and are movably arranged on auxiliary rocker arm (5) Jacking block (701), the jacking block (701) have kept between front end and exhaust rocker arm (4) first position of certain brake clearance with And front end can be in contact with exhaust rocker arm (4) and realize the second position of braking function.

2. electric-controlled type engine braking apparatus according to claim 1, it is characterised in that: the electric control mechanism (7) Further include perfoming block (702), pushing component (703) and jacking block (701) is driven to be maintained at the elastic reset component of first position (704), the auxiliary rocker arm (5) is equipped with axial hole (51) and transverse holes (52) of intersection setting, and the transverse holes (52) Front opening setting；

The perfoming block (702) is slidably arranged in axial hole (51), and the jacking block (701) is slidably arranged in transverse holes (52) Front end, and the perfoming block (702) is linked with jacking block (701), described perfoming block (702) one end stretch out axial hole (51) with Pushing component (703) is corresponding, and it is corresponding with exhaust rocker arm (4) that transverse holes (52) are stretched out in jacking block (701) front end.

3. electric-controlled type engine braking apparatus according to claim 2, it is characterised in that: the electric control mechanism (7) It further include sliding block (705), steel ball (706), the first transmitting plunger (707), the second transmitting plunger (708)；

The sliding block (705) is slidably arranged in axial hole (51)；

The steel ball (706) is arranged between sliding block (705) and perfoming block (702), and steel ball (706) is arranged in axial hole (51) With the intersection location of transverse holes (52)；

First transmitting plunger (707) setting is in transverse holes (52), first transmitting plunger (707) rear end and transverse holes (52) rear end thereof cooperates, front end and steel ball (706) mating spherical surfaces；

Second transmitting plunger (708) setting is in transverse holes (52), second transmitting plunger (708) front end and jacking block (701) rear end thereof cooperates, rear end and steel ball (706) mating spherical surfaces.

4. electric-controlled type engine braking apparatus according to claim 3, it is characterised in that: open transverse holes (52) rear end Mouth setting, and transverse holes (52) rear end inner wall is formed with internal screw thread, transverse holes (52) rear end, which is equipped with, adjusts bolt (709), The adjusting bolt (709) is externally provided with fixture nut (710), and the adjusting bolt (709) passes through fixture nut (710) fixing lock Tightly.

5. electric-controlled type engine braking apparatus according to claim 4, it is characterised in that: adjusting bolt (709) The rear end face of the concave globoidal structure of front end face, first transmitting plunger (707) is in convex-shaped arc surface structure, first transmitting Cooperation is freely rotated in plunger (707) rear end and the preceding end in contact for adjusting bolt (709), formation；

The front end face of the concave globoidal structure of rear end face of the jacking block (701), second transmitting plunger (708) is in convex arc Cooperation is freely rotated in face structure, the front end of two transmitting plunger (708) and the rear end in contact of jacking block (701), formation.

6. electric-controlled type engine braking apparatus according to claim 4 or 5, it is characterised in that: the elastic reset component It (704) include the first spring (7041), second spring (7042)；

First spring (7041) is arranged between jacking block (701) and auxiliary rocker arm (5), and jacking block (701) is driven to slide backward, Connect jacking block (701), the second transmitting plunger (708), steel ball (706), the first transmitting plunger (707), adjusting bolt (709) always Touching；

The second spring (7042) is arranged between sliding block (705) and auxiliary rocker arm (5), drives sliding block (705) to perfoming block (702) direction slides, and contacts sliding block (705), steel ball (706), perfoming block (702) always.

7. electric-controlled type engine braking apparatus according to claim 6, it is characterised in that: the front end of the transverse holes (52) Opening is equipped with door (711), the jacking block (701) structure in the shape of a " convex ", and the protrusion of jacking block (701) partially passes through door (711), and the first spring (7041) is set in the protrusion part of jacking block (701), and one end offsets with door (711), the other end with The convex shoulder of jacking block (701) offsets.

8. electric-controlled type engine braking apparatus according to claim 6, it is characterised in that: the opening of the axial hole (51) Place is equipped with circlip (712), the perfoming block (702) structure in the shape of a " convex ", and the protrusion of perfoming block (702) partially passes through circlip (712), the sliding block (705) structure in the shape of a " convex ", the second spring (7042) are set in the protrusion of sliding block (705) Point, the convex shoulder of one end and sliding block (705) offsets, and the other end and the bottom surface of axial hole (51) offset.

9. electric-controlled type engine braking apparatus according to claim 2, it is characterised in that: pushing component (703) packet Slide plate frame (7031), slide plate (7032), actuating motor (7033) are included, is contacted leaf spring (7034)；

The slide plate frame (7031) is arranged in the top of auxiliary rocker arm (5), and the slide plate (7032) is slidably arranged in slide plate frame (7031) it on, and is arranged in parallel with rocker arm shaft (2), the actuating motor (7033) is drivingly connected slide plate (7032), can drive cunning Plate (7032) along rocker arm shaft (2) axial direction toward polyslip, the contact leaf spring (7034) is mounted on slide plate (7032), and It is corresponding with perfoming block (702).

10. electric-controlled type engine braking apparatus according to claim 9, it is characterised in that: slide plate frame (7031) packet It includes and is successively spaced sets along its length with rocker arm shaft (2) mounting plate disposed in parallel (70311), the mounting plate (70311) It is equipped with several sliding slots (70312), the slide plate (7032) is arranged across sliding slot (70312).

11. electric-controlled type engine braking apparatus according to claim 9, it is characterised in that: the actuating motor (7033) Output shaft be equipped with perpendicular setting execution bar (70331), the slide plate (7032) be equipped with one with execute bar (70331) compatible execution hole (70321), the execution bar (70331), which passes through, executes hole (70321) setting.

12. electric-controlled type engine braking apparatus according to claim 9, it is characterised in that: the contact leaf spring (7034) In " 7 " character form structure, the slide plate (7032) is equipped with the compatible card slot (70322) with contact leaf spring (7034), described to connect Contact spring (7034) upper end passes through card slot (70322), and bends and cooperate with slide plate (7032) limit.

13. electric-controlled type engine braking apparatus according to claim 1, it is characterised in that: shape on the exhaust rocker arm (4) The corresponding plane (45) of Cheng Youyu jacking block (701).

Technical field

The present invention relates to a kind of medium and heavy diesel oil and natural gas engines, and in particular to a kind of electric-controlled type engine braking dress It sets.

Background technique

China mountain range is numerous, and mountain area area is vast, accounts for about the 69% of territory total area, heavy goods vehicle is in the long downhill path in mountain area Section, driver frequently use service brake, and large energy can be absorbed in running brake in a short time, but with braking time Increase, surface of friction pair temperature between brake drum and shoe brake increases, and coefficient of friction reduces, and ultimately causes brake efficiency The decline even unsafe condition of brake failure cause major traffic accidents.In order to improve the driving safety of heavy type commercial automobile, It needs to increase auxiliary braking system on the basis of service brake, to guarantee vehicle during descending with sustained Brake force.

Automobile-used auxiliary braking system is broadly divided into two classes: retarder and engine braking system.Engine braking system by It is used widely the advantages that its structure is simple, easy for installation, cheap.

Engine braking technology refers to that driver lifts accelerator pedal in vehicle traveling process, loosens the clutch, and utilizes hair Generated resistance to compression pression and intake and exhaust resistance and frictional force are formed by braking masterpiece to driving wheel in motivation compression travel With being allowed to brake automobile.Engine braking technology is divided into Compression Engine braking, deflation type engine braking and portion Divide three kinds of deflation type engine braking.Compression Engine braking is to open exhaust valve or auxiliary gas near Door；Deflation type engine braking is to open exhaust valve in entire cycle of engine；Part deflation type engine braking is to start Most of stroke of machine circulation opens exhaust valve.The application of engine braking technology efficiently reduces using frequently for running brake Rate, vehicle, using engine braking, can use braking at precipitous road surfaces such as lower long slope, rugged hill paths to avoid because of long-time Device causes the temperature of brake bush to increase, and declines brake force or even ineffective.

Engine braking apparatus is capable of providing one or multiple auxiliary valve lifts, for realizing engine braking function Energy.Have multiple patents of invention at present and be related to the application of technique, it includes additional one that major technique, which is outside the main lift of cam, A or several auxiliary lifts can also increase a cam dedicated for braking according to the needs of engine operation and start mechanism Dynamic device makes auxiliary lifts work and (realize engine braking function) or it is made not work.

Patent CN200980158946.8 is the dedicated rocker arm h type engine h system of Jacobs Vehicle Systems Inc.'s application Dynamic device, a kind of system for driving engine exhaust port of the disclosure of the invention, the system comprises rocker arm shafts, have control fluid Supply passageway and exhaust rocker arm, are pivotably mounted on rocker arm shaft.Brake rocker arm of engine can include central opening, The hydraulic path that central opening is connect with control valve, and the fluid passage that control valve is connect with action piston assembly.

Patent CN201080019296.1 is Jacobs Vehicle Systems Inc.'s application for engine braking and exhaust The lost motion variable valve actuation system opened in advance, the system may include the first cam, and first cam has compression Release projection part and prerelease door open convex portion, and the prerelease door is opened convex portion and is connected to first On the hydraulic lost motion system of rocker arm.The piston of hydraulic way actuating can selectively extend from the hydraulic lost motion system, with Compression release actuating is provided to the exhaust valve or prerelease door opens actuating.The piston of hydraulic way actuating can be used as Relay piston in MS master-slave piston circuit is arranged in fixed shell, or alternatively as hydraulic piston slideably cloth It sets in rocker arm.

Patent CN200910140026.5 is the single with valve auxiliary control of Man Nutzfahrzeuge AG's application First engine braking apparatus and the method for engine braking, the exhaust valve of the brake apparatus include one by means of one The mechanical bindiny mechanism of hydraulic valve Auxiliary Control Element is connected with camshaft.Hydraulic valve Auxiliary Control Element will be vented Valve is maintained on the position temporarily opened.Hydraulic valve Auxiliary Control Element can be by means of the main oil time relative to internal combustion engine The auxiliary oil return line of the additional setting in road is switched on and off.

Engine braking patent described above is all the medium using engine motor oil as transmitting valve motion rule, braking The characteristics of motion of valve is largely dependent upon some characteristics of machine oil, when as excessively high such as machine oil void fraction, braking valve lift It can lose, to influence braking ability.In addition, when engine oil viscosity is excessively high, also will affect engine braking when oil temperature is too low Normal work.Therefore, when the above engine braking technology requires that oil temperature is higher than some limit value (such as 40 DEG C), engine Braking could intervene, thus it is so also can limit value engine braking applying working condition.For another example mechanism is started using machine oil driving Dynamic, the time that engine braking is intervened and exited is generally longer (> 0.4s), turns in this way to engine braking and fired state The process of changing has an impact, and causes engine transient conversion process unstable.

Summary of the invention

In order to overcome the shortcomings of that background technique, the present invention provide a kind of electric-controlled type engine braking apparatus.

The technical solution adopted in the present invention: a kind of electric-controlled type engine braking apparatus, including

Exhaust valve；

Rocker arm shaft；

Camshaft is arranged in parallel with rocker arm shaft, and has the exhaust cam and auxiliary cam being adjacently positioned；

Exhaust rocker arm is rotatably installed on rocker arm shaft, front end with exhaust valve is corresponding contacts, its rear end and exhaust cam pair It should contact；

Auxiliary rocker arm is rotatably installed on rocker arm shaft, and is disposed adjacent with exhaust rocker arm, and its rear end is opposite with auxiliary cam It answers；

Auxiliary rocker arm can be pushed down and is in contact with auxiliary cam by elastic component；

Further include electric control mechanism, include at least a jacking block being movably arranged on auxiliary rocker arm, the jacking block has It keeps the first position of certain brake clearance and front end that can be in contact with exhaust rocker arm between front end and exhaust rocker arm and realizes system The second position of dynamic function.

The electric control mechanism further includes perfoming block, pushing component and jacking block is driven to be maintained at the elasticity of first position Reset assembly, the auxiliary rocker arm is equipped with the axial hole and transverse holes of intersection setting, and the transverse holes front opening is arranged； The perfoming block is slidably arranged in axial hole, and the jacking block is slidably arranged in the front end of transverse holes, and the perfoming block and top Block is linked, and it is corresponding with pushing component that axial hole is stretched out in described perfoming block one end, the jacking block front end stretch out transverse holes and Exhaust rocker arm is corresponding.

The electric control mechanism further includes sliding block, steel ball, the first transmitting plunger, the second transmitting plunger；The sliding block is sliding It is dynamic to be arranged in axial hole；The steel ball is arranged between sliding block and perfoming block, and axial hole and transverse holes are arranged in steel ball Intersection location；The first transmitting plunger is arranged in transverse holes, the first transmitting plunger back-end and transverse holes rear end thereof Cooperation, front end and steel ball mating spherical surfaces；It is described second transmitting plunger be arranged in transverse holes, it is described second transmitting plunger front end with The cooperation of jacking block rear end thereof, rear end and steel ball mating spherical surfaces.

The transverse holes open rearward end setting, and transverse holes rear end inner wall is formed with internal screw thread, the transverse holes rear end is set There is adjusting bolt, the adjusting bolt is externally provided with fixture nut, and the adjusting bolt is locked by the way that fixture nut is fixed.

The rear end face of the concave globoidal structure of front end face for adjusting bolt, the first transmitting plunger is in convex-shaped arc surface Cooperation is freely rotated in structure, the first transmitting plunger back-end and the preceding end in contact for adjusting bolt, formation；The rear end of the jacking block The front end face of the concave globoidal structure in face, the second transmitting plunger is in convex-shaped arc surface structure, the front end of the two transmitting plunger With the rear end in contact of jacking block, cooperation is freely rotated in formation.

The elastic reset component includes the first spring, second spring；The first spring setting is shaken in jacking block and auxiliary Between arm, jacking block is driven to slide backward, connects jacking block, the second transmitting plunger, steel ball, the first transmitting plunger, adjusting bolt always Touching；The second spring is arranged between sliding block and auxiliary rocker arm, drives sliding block to Block direction sliding is executed, make sliding block, steel ball, Perfoming block contacts always.

Door, the jacking block structure in the shape of a " convex ", the protrusion part of jacking block are equipped at the front opening of the transverse holes Across door, and the first spring is set in the protrusion part of jacking block, and one end offsets with door, the convex shoulder phase of the other end and jacking block It supports.

The opening of the axial hole is equipped with circlip, the perfoming block structure in the shape of a " convex ", the protrusion part of perfoming block Across circlip, the sliding block structure in the shape of a " convex ", the second spring is set in the protrusion part of sliding block, one end and sliding block Convex shoulder offsets, and the bottom surface of the other end and axial hole offsets.

The pushing component includes slide plate frame, slide plate, actuating motor, contacts leaf spring；The slide plate frame setting is shaken in auxiliary The top of arm, the slide plate slides setting are arranged in parallel on slide plate frame, and with rocker arm shaft, and the actuating motor, which is drivingly connected, to be slided Plate can drive slide plate along the axial direction of rocker arm shaft toward polyslip, and the contact leaf spring is mounted on slide plate, and with perfoming block phase It is corresponding.

The slide plate frame includes successively being spaced along its length with rocker arm shaft mounting plate disposed in parallel, the mounting plate Several sliding slots are provided with, the slide plate is arranged across sliding slot.

The output shaft of the actuating motor is equipped with the execution bar of perpendicular setting, and the slide plate is equipped with one and execution The compatible execution hole of bar, the execution bar, which passes through, executes hole setting.

The contact leaf spring is in " 7 " character form structure, and the slide plate is equipped with card slot compatible with contact leaf spring, described to connect Contact spring upper end passes through card slot, and bends and cooperate with slide plate limit.

Plane corresponding with jacking block is formed on the exhaust rocker arm.

The course of work of above-mentioned electric-controlled type engine braking apparatus:

When engine work, jacking block is between first position, with exhaust rocker arm there are certain brake clearance, and auxiliary is shaken The movement of arm does not interfere with exhaust rocker arm, will not influence exhaust valve；

When engine braking or EGR work, jacking block is acted under the action of electric control mechanism in the second position, and compensation is pre- The brake clearance stayed is in contact with exhaust rocker arm, and when the small lift of auxiliary cam works, auxiliary rocker arm is rotated while being driven Exhaust rocker arm rotation, so that exhaust valve is opened as required, plays the purpose of engine braking or internal EGR.

The beneficial effects of the present invention are: using above scheme, 1, eliminate and use machine oil bring security risk: engine Brake apparatus is driven using electric control mechanism, when eliminating engine start, due to engine oil viscosity is high, engine oil pressure greatly caused by Braking function, which opens by mistake, to be opened and bring unstable idle speed and emits white cigarette problem；

2, increase engine braking using area: current fluid pressure type or solid chain type engine braking are due to using machine oil as work Make medium, oil temperature and engine oil pressure there are certain requirements, engine braking just can be with when such as requiring 40 °C of oil temperature > Intervention uses engine braking when just starting which limit vehicle, and uses electric control mechanism driving will not be by these Part limitation can use any time after vehicle starting；

3, engine braking enters into and exits from the time and is obviously shortened: traditional fluid pressure type or solid chain type engine braking are due to using Machine oil as working media or drive control medium, engine braking to enter into and exit from the time longer, generally require 0.2s~ 0.4s, and engine braking apparatus can revolve turn around interior completion positive work and negative work in camshaft using electric control mechanism driving Switching promotes engine braking and enters into and exits from 4~5 times of speed.

4, it reduces engine fuel consumption: machine oil is not needed as driving medium, engine using electric control mechanism Machine oil demand and lubricating oil pump supply capability can be reduced suitably, therefore facilitate the reduction of fuel consumption.

Detailed description of the invention

Fig. 1 is the schematic view of the front view of electric-controlled type of embodiment of the present invention engine braking apparatus.

Fig. 2 is the sectional perspective structural schematic diagram of electric-controlled type of embodiment of the present invention engine braking apparatus.

Fig. 3 is auxiliary rocker arm and exhaust rocker arm position when electric-controlled type of embodiment of the present invention engine braking apparatus works normally Relationship.

Auxiliary rocker arm and exhaust rocker arm position when Fig. 4 is electric-controlled type of embodiment of the present invention engine braking apparatus braking operation Relationship.

Fig. 5 is cross-sectional view when electric-controlled type of embodiment of the present invention engine braking apparatus works normally.

Cross-sectional view when Fig. 6 is electric-controlled type of embodiment of the present invention engine braking apparatus braking operation.

Fig. 7 is the structural schematic diagram of auxiliary rocker arm of the embodiment of the present invention.

Fig. 8 is the structural schematic diagram of exhaust rocker arm of the embodiment of the present invention.

Fig. 9 is the structural schematic diagram of slide plate of embodiment of the present invention frame.

Figure 10 is the structural schematic diagram of slide plate of the embodiment of the present invention.

Figure 11 is the structural schematic diagram of actuating motor of the embodiment of the present invention.

Figure 12 is the structural schematic diagram that the embodiment of the present invention contacts leaf spring.

Specific embodiment

Embodiments of the present invention is further illustrated with reference to the accompanying drawing:

As shown in Figs 1-4, a kind of electric-controlled type engine braking apparatus, including exhaust valve 1, rocker arm shaft 2, camshaft 3, exhaust rocker arm 4, auxiliary rocker arm 5, elastic component 6, automatically controlled control mechanism 7.

The exhaust valve 1 is including first row valve 11, second row valve 12 and crosses at first row valve 11 and second Air valve bridge 13 on exhaust valve 12, first row valve 11 and second row valve 12 are all made of mushroom valve, for controlling engine The flowing of gas between inner combustion chamber and intake and exhaust manifold.

The rocker arm shaft 2 is arranged in parallel with camshaft 3, have on the camshaft 3 exhaust cam 31 that is adjacently positioned with Auxiliary cam 32,3 rotational energy of camshaft drive exhaust cam 31 and auxiliary cam 32 to rotate simultaneously.

The exhaust rocker arm 4 is rotatably installed on rocker arm shaft 2, and the front end of the exhaust rocker arm 4 and air valve bridge 13 are right It should contact, rear end is contacted with the correspondence of exhaust cam 31, therefore with the rotation of camshaft 3, exhaust rocker arm 4 can be in exhaust cam 31 under the collective effect of exhaust valve 1 around 2 rotary oscillation of rocker arm shaft, to realize exhaust by exhaust cam 31, exhaust rocker arm 4 The exhaust stroke of door 1.

Wherein, the first idler wheel 41, first idler wheel 41 and row are installed by the first roller shaft in 4 rear end of exhaust rocker arm Gas cam 31 is in contact, and rolls cooperation due to being formed between exhaust cam 31 and the first idler wheel 41, greatly reduces exhaust Frictional force between cam 31 and exhaust rocker arm 4 reduces abrasion, improves service life.

4 front end of exhaust rocker arm is equipped with adjustment bolt 43, image angle 42, locking nut 44, and the image angle 42 passes through dedicated Tool is fitted in the lower end of adjustment bolt 43, and image angle 42 can be freely rotated in certain corner, 43 upper end of adjustment bolt It is prominent from the top of 4 front end of exhaust rocker arm, and be locked by locking nut 44, connect stronger reliable, the image angle 42 are in contact with air valve bridge 13, since the freedom degree of image angle 42 is higher, with the wobbling action of exhaust rocker arm 4, and guarantee and valve The contact effect of bridge 13 guarantees the operation is stable.

The auxiliary rocker arm 5 is rotatably installed on rocker arm shaft 2, is disposed adjacent with exhaust rocker arm 4, the auxiliary rocker arm 5 rear end is corresponding with auxiliary cam 32, and is pushed down by elastic component 6 and be in contact with auxiliary cam 32, therefore camshaft 3 rotates When, auxiliary cam 32 is able to drive auxiliary rocker arm 5 along 2 rotary oscillation of rocker arm shaft.

Likewise, the second idler wheel 53, second rolling can be installed by the second roller shaft in 5 rear end of auxiliary rocker arm Wheel 53 is contacted with auxiliary cam 32, is formed between auxiliary cam 32 and the second idler wheel 53 and is rolled cooperation, and it is convex to greatly reduce auxiliary Frictional force between wheel 32 and auxiliary rocker arm 5 reduces abrasion, improves service life.

Wherein, the auxiliary cam 32 includes basic circle and one or two peaches 321, such as is arranged in the present embodiment Two peaches 321, respectively include a braking peach and an EGR peach or a BGR peach, and braking peach is used for A braking lift is provided, optional EGR peach can provide an EGR lift, optional BGR peach when engine makees positive work One BGR lift can be provided in engine braking.

In addition, elastic component 6 also has many selectable modes, in the present embodiment, elastic component 6 uses spring, one end It is fixed on the rear end of auxiliary rocker arm 5, the other end is fixed on spring(-supported) mount (being not drawn on figure), and spring(-supported) mount is fixed on engine cylinder cover Or on the components of other fixations, in engine working process, there is elastic component 6 enough spring forces to make engine auxiliary rocker arm 5 are in contact with auxiliary cam 32 always.

Certainly, in engine working process, auxiliary rocker arm 5 can by the other modes such as such as leaf spring, torsional spring keep with The contact of auxiliary cam 32.

The electric control mechanism 7 includes at least a jacking block 701 being movably arranged on auxiliary rocker arm 5, the jacking block 701 have keep the first position of certain brake clearance and front end that can connect with exhaust rocker arm 4 between front end and exhaust rocker arm 4 The second position of braking function is realized in touching.

It is preferably engaged between jacking block 701 and exhaust rocker arm 4 to realize, is also formed in the rear end of exhaust rocker arm 4 There is plane 45 corresponding with jacking block 701.

When engine work, jacking block 701 is in that there are certain brake cabins between first position, with exhaust rocker arm 4 Gap, the movement of auxiliary rocker arm 5 do not interfere with exhaust rocker arm 4, so that exhaust valve 1 will not be influenced, guarantee that engine is normal Work；

When engine braking or EGR work, jacking block 701 is acted under the action of electric control mechanism 7 in the second position, is mended Repaying reserved brake clearance can be in contact with exhaust rocker arm 4, when the small lift of auxiliary cam works, auxiliary rocker arm rotation Exhaust rocker arm 4 can be driven to rotate simultaneously, so that exhaust valve 1 is opened as required, play the purpose of engine braking or internal EGR.

As illustrated in figs. 5-7, the auxiliary rocker arm 5 is equipped with the axial hole 51 and transverse holes 52 of intersection setting, the axial direction Hole 51 is arranged in parallel with rocker arm shaft 2, and the transverse holes 52 are in be arranged with substantially vertical lateral of axial hole 51, front opening with Exhaust rocker arm 4 is corresponding.

As shown in Fig. 1-2,5-7, the electric control mechanism 7 includes jacking block 701, perfoming block 702, pushing component 703, bullet Property reset assembly 704, the perfoming block 702 are slidably arranged in axial hole 51, and the jacking block 701 is slidably arranged in transverse holes 52 Front end, and the perfoming block 702 is linked with jacking block 701, the pushing component 703 be fixedly mounted on engine head or On other retaining elements, the elastic reset component 704 is maintained at first position for jacking block 701, perfoming block 702.

When engine work, pushing component 703 does not work, and jacking block 701 is under the action of elastic reset component 704 In first position, when engine braking or EGR work, pushing component 703 works, and the elasticity of elastic parts 704 is overcome to make With pushing perfoming block 702 to slide along axial hole 51, perfoming block 702 then drives jacking block 701 to slide forward, and jacking block 701 is made to be in the Two positions.

As seen in figs. 5-6, the electric control mechanism 7 further includes that sliding block 705, steel ball 706, first transmit plunger 707, the Two transmitting plungers 708 adjust bolt 709, fixture nut 710, door 711, circlip 712.

The 52 rear end inner wall of transverse holes is formed with internal screw thread, and 52 rear end of transverse holes, which is equipped with, adjusts bolt 709, described It adjusts bolt 709 and is externally provided with fixture nut 710, open rearward end setting and installation and adjustment bolt 709 by transverse holes 52, not only just In the installation of components each in transverse holes 52, while can realize between the jacking block 701 of electric control mechanism 7 and exhaust rocker arm 4 Fine position, the adjusting bolt 709 are solid and reliable by the fixed locking of fixture nut 710.

The sliding block 705 is slidably arranged in axial hole 51；The steel ball 706 setting sliding block 705 and perfoming block 702 it Between, and the intersection location of axial hole 51 Yu transverse holes 52 is arranged in steel ball 706；The first transmitting plunger 707 is arranged in transverse direction In hole 52, and its thickness or diameter are less than transverse holes 52, and first transmitting 707 rear end of plunger is matched with the rotation of bolt 709 is adjusted It closes, certain angle, front end and 706 mating spherical surfaces of steel ball can be turned in transverse holes 52；The second transmitting setting of plunger 708 exists In transverse holes 52, and its thickness or diameter are less than transverse holes 52, and second transmitting 708 front end of plunger and 701 rear end of jacking block turn Dynamic cooperation, can turn over certain angle, rear end and 706 mating spherical surfaces of steel ball in transverse holes 52.

Wherein, the concave globoidal structure of front end face for adjusting bolt 709, the rear end of the first transmitting plunger 707 Face is in convex-shaped arc surface structure, and first transmitting 707 rear end of plunger and the preceding end in contact for adjusting bolt 709, formation are freely rotated Cooperation；The front end face of the concave globoidal structure of rear end face of the jacking block 701, the second transmitting plunger 708 is in convex-shaped arc surface Cooperation is freely rotated in structure, the front end of the two transmitting plunger 708 and the rear end in contact of jacking block 701, formation.

It is realized and is rotated by the cooperation of convex-shaped arc surface structure and concave-shaped arc surface structure, structure is simple, convenient for assembling assembly.

The elastic reset component 704 includes the first spring 7041, second spring 7042；The door 711 is arranged in cross To at the front opening in hole 52, the jacking block 701 structure in the shape of a " convex ", the protrusion of jacking block 701 partially passes through door 711, and First spring 7041 is set in the protrusion part of jacking block 701, and one end offsets with door 711, the convex shoulder phase of the other end and jacking block 701 It supports, jacking block 701 can be driven to slide backward, so that jacking block 701, second is transmitted plunger 708, steel ball 706, first transmits plunger 707, adjusts Section bolt 709 contacts always.

The opening of the axial hole 51 is equipped with circlip 712, the perfoming block 702 structure in the shape of a " convex ", perfoming block 702 Protrusion partially pass through circlip 712, the sliding block 705 structure in the shape of a " convex ", the second spring 7042 is set in sliding block 705 Protrusion part, one end and the convex shoulder of sliding block 705 offset, and the bottom surface of the other end and axial hole 51 offsets, can drive sliding block 705 to The sliding of 702 direction of perfoming block, contacts sliding block 705, steel ball 706, perfoming block 702 always.

When engine braking or EGR work, pushing component 703 works, and overcomes the elastic reaction of elastic parts 704, pushes away Dynamic perfoming block 702 slides along axial hole 51, and perfoming block 702 passes through steel ball 706 and the first transmitting plunger 707, the second transfer column Power is transferred to jacking block 701 by plug 708, drives jacking block 701 to slide forward, jacking block 701 is made to be in the second position；Pass through steel ball 706 and the modes of mating spherical surfaces realize that power transmits, act fast and stable, and frictional force is small, and service life is high.

When engine work, pushing component 703 reset, the first spring 7041 push jacking block 701, steel ball 706 to After move, while second spring 7042 pushes sliding block 705, steel ball 706, perfoming block 702 to be displaced outwardly, and realizes and resets, makes jacking block 701 are in first position, and stable structure, homing action is quick.

Further, also arc-shaped face, cooperation are more reliable and more stable for the contact surface of the perfoming block 702 and steel ball 706.

In addition, the matching relationship between jacking block 701 and perfoming block 702 is not limited to above embodiment, can also use Other modes, such as the mode of inclined-plane cooperation.

As shown in Fig. 1-2,9-12, the pushing component 703 includes slide plate frame 7031, slide plate 7032, actuating motor 7033, Contact leaf spring 7034.

The slide plate frame 7031 is fixedly mounted on the cylinder cap or other retaining elements of engine comprising mounting plate 70311, the side of mounting plate 70311 successively spaced several sliding slots 70312 along its length, the mounting plate 70311 its length direction are arranged in parallel with rocker arm shaft 2.

The elongated structure of the slide plate 7032, passes through sliding slot 70312 and the sliding of sliding slot 70312 cooperates, and slide plate 7032 are equipped with an execution hole 70321 and at least one card slot 70322.

The actuating motor 7033 is fixedly mounted on the cylinder cap or other retaining elements of engine by motor cabinet 7035 On, the output shaft of the actuating motor 7033 is equipped with the execution bar 70331 of perpendicular setting, and the execution bar 70331 is worn The setting of execution hole 70321 is crossed, when actuating motor 7033 rotates, can drive and execute the rotation of bar 70331, so as to stir slide plate 7032 70312 slidings along the chute.

The contact leaf spring 7034 is in " 7 " character form structure, and the slide plate 7032 is equipped with to be adapted with contact leaf spring 7034 Card slot 70322,7034 upper end of contact leaf spring pass through card slot 70322, and bend with slide plate 7032 limit cooperate.

When engine braking or EGR work, actuating motor 7033 rotates, and drives slide plate 7032 by executing bar 70331 Sliding, slide plate 7032 is mobile with moving contacting plate spring 7034, and contact leaf spring 7034 is made to contact with perfoming block 702 and push perfoming block 702, perfoming block 702 drives jacking block 701 to slide onto the second position.

When engine restores to work normally, actuating motor 7033 is reversely rotated, and drives slide plate by executing bar 70331 7032 reduction of spondylolisthesis, slide plate 7032 is mobile with moving contacting plate spring 7034, separates contact leaf spring 7034 with perfoming block 702, executes Block 702, jacking block 701 reset under the action of elastic reset component 704.

Contact leaf spring 7034 also ensures that contact leaf spring so that auxiliary rocker arm 5 is when rotated with 702 face contact of perfoming block Contact between 7034 and perfoming block 702, it is ensured that jacking block 701 is in the second position.

It being contacted using the structure of contact leaf spring 7034 with perfoming block 702, contact leaf spring 7034 itself has certain elasticity, So that there is certain overrun distance in contact process, guarantee that cooperation is stablized.

In addition, multiple contact chips spring 7034, each 7034 arranged for interval of contact leaf spring, and difference can be set in slide plate 7032 Corresponding with each group electric-controlled type engine braking apparatus, synchronization action between each cylinder, not only structure is more compact, but also brakes fast Speed is stablized.

The specific work process of above-mentioned electric-controlled type engine braking apparatus is as follows;

When engine work, automatically controlled control mechanism 7, jacking block 701 is in be existed between first position, with exhaust rocker arm 4 Certain brake clearance, the movement of auxiliary rocker arm 5 do not interfere with exhaust rocker arm 4, do not influence the movement of exhaust valve 1；

When engine braking operation, actuating motor 7033 starts to rotate, when the output shaft of actuating motor 7033 turns over certain angle Afterwards, executing bar 70331 drives slide plate 7032 to move in sliding slot 70312, and the mobile band moving contacting plate spring 7034 of slide plate 7032 moves Dynamic, contact leaf spring 7034 contacts with perfoming block 702 and perfoming block 702 is driven to move along axial hole 51, and perfoming block 702 pushes steel ball 706 movements, steel ball 706 then drives the first transmitting plunger 707, second to transmit plunger 708, sliding block 705 adapts to adjust, sliding block 705 Second spring 7042 is compressed to slide, the first transmitting plunger 707 transmits plunger 708 to horizontal motion with second, and second Transmitting plunger 708 pushes jacking block 701 to compress the forward movement of the first spring 7041, and makes the front end of the stretching transverse holes 52 of jacking block 701 Be open certain distance so that jacking block 701 be in the second position and is in contact with the plane 45 of exhaust rocker arm 4, compensate brake rocker arm and Gap between exhaust rocker arm drives air valve bridge in engine compression strokes near top dead center under the driving of auxiliary cam 32 13 open first row valve 11 and second row valve 12, realize engine braking, or open first row valve 11 in induction stroke With second row valve 12, internal EGR is realized.

When engine restores to work normally, actuating motor 7033 starts to reversely rotate, when the output shaft of actuating motor 7033 It after turning over certain angle, executes bar 70331 and slide plate 7032 is driven to move in sliding slot 70312, mobile drive of slide plate 7032 connects Contact spring 7034 is mobile, and contact leaf spring 7034 is separated with perfoming block 702, is not applying driving force, the first spring to perfoming block 702 7041 push jacking block 701 to reset, while second spring 7042 pushes sliding block 705 to reset, and jacking block 701, sliding block 705 push perfoming block 702, steel ball 706, first transmits plunger 707, second and transmits 708 return of plunger, at this point, jacking block 701 is in first position and row The separation of plane 45 of gas Rocker arm 4 keeps certain brake clearance, and the movement of auxiliary rocker arm 5 does not interfere with exhaust rocker arm 4, not shadow It rehearses with musical accompaniment the movement of valve 1, engine work.

Above-mentioned electric-controlled type engine braking apparatus and existing the starting using machine oil as transmitting valve motion rule medium Machine braking device is compared, and there are following advantages:

1, eliminate and use machine oil bring security risk: engine braking apparatus is driven using actuating motor, and passes through pure machine The linkage structure of tool formula cooperates, when eliminating engine start, due to engine oil viscosity is high, engine oil pressure greatly caused by braking work It can open by mistake and open and bring unstable idle speed and emit white cigarette problem；

2, increase engine braking using area: current fluid pressure type or solid chain type engine braking are due to using machine oil as work Make medium, oil temperature and engine oil pressure there are certain requirements, engine braking just can be with when such as requiring 40 °C of oil temperature > Intervention uses engine braking when just starting which limit vehicle, and is driven using actuating motor, and pass through Purely mechanical Linkage structure cooperation, will not be limited by these conditions, can be used any time after vehicle starting；

3, engine braking enters into and exits from the time and is obviously shortened: traditional fluid pressure type or solid chain type engine braking are due to using Machine oil as working media or drive control medium, engine braking to enter into and exit from the time longer, generally require 0.2s~ 0.4s, and engine braking apparatus is driven using actuating motor, and can be in camshaft by the cooperation of the linkage structure of Purely mechanical The switching for revolving turn around interior completion positive work and negative work, promotes engine braking and enters into and exits from 4~5 times of speed.

4, it reduces engine fuel consumption: being driven using actuating motor, and cooperated by mechanical linkage structure, do not needed As driving medium, engine motor oil demand and lubricating oil pump supply capability can be reduced suitably machine oil, therefore facilitate fuel oil The reduction of consumption.

In addition, being to directly control one of exhaust valve by auxiliary rocker arm when available engine brake apparatus is braked Braking is realized in movement, i.e., only controls first row valve or second row valve event, and above-mentioned electric-controlled type engine braking apparatus When engine braking or EGR work, auxiliary rocker arm 5 is to drive air valve bridge 13 to act by means of exhaust rocker arm 4, brakes Shi Qiqi The raft of pontoons 13 drives the first valve 11 and duaspiracle 12 simultaneously, and effect is more preferable.

In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite Importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two More than.

Every technical staff's notice: of the invention although the present invention is described according to above-mentioned specific embodiment Invention thought be not limited in the invention, any repacking with inventive concept will all be included in this patent protection of the patent right In range.