阅读说明：本技术 多驱动源的发动机制动控制装置 (Engine brake control device with multiple driving sources ) 是由 褚志强 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种多驱动源的发动机制动控制装置,包括支撑框架,支撑框架内设置有控制阀腔,控制阀腔内滑动安装有控制阀总成,支撑框架上位于控制阀总成一侧设置用于通入驱动源的制动驱动通道,制动驱动通道与控制阀腔连通,支撑框架与控制阀总成的另一侧之间设置有控制阀回位装置,控制阀回位装置上设置有与控制阀腔连通的释放泄油通道；支撑框架上还设置有分别与控制阀腔连通的制动供油通道与制动充油通道,控制阀总成在控制阀腔内往复运动间歇连通制动供油通道与制动充油通道之间通道和制动充油通道与释放泄油通道之间通道；本发明具有充油迅速、制动反应时间短、制动响应快等优点,且还可以选用不同驱动源来驱动控制阀总成。(The invention discloses an engine brake control device with multiple driving sources, which comprises a supporting frame, wherein a control valve cavity is arranged in the supporting frame, a control valve assembly is arranged in the control valve cavity in a sliding manner, a brake driving channel for leading in the driving sources is arranged on one side of the control valve assembly on the supporting frame, the brake driving channel is communicated with the control valve cavity, a control valve returning device is arranged between the supporting frame and the other side of the control valve assembly, and a release oil drainage channel communicated with the control valve cavity is arranged on the control valve returning device; the support frame is also provided with a braking oil supply channel and a braking oil charge channel which are respectively communicated with the control valve cavity, and the control valve assembly reciprocates in the control valve cavity and intermittently communicates a channel between the braking oil supply channel and the braking oil charge channel and a channel between the braking oil charge channel and the releasing oil drain channel; the invention has the advantages of rapid oil filling, short brake reaction time, rapid brake response and the like, and can select different driving sources to drive the control valve assembly.)

1. Engine brake control device of many driving sources, including braced frame, its characterized in that: a control valve cavity is arranged in the support frame, a control valve assembly is slidably mounted in the control valve cavity, a brake driving channel for leading in a driving source is arranged on one side of the control valve assembly on the support frame, the brake driving channel is communicated with the control valve cavity, a control valve return device is arranged between the support frame and the other side of the control valve assembly, and a release oil drainage channel communicated with the control valve cavity is arranged on the control valve return device; the support frame is also provided with a braking oil supply channel and a braking oil charge channel which are respectively communicated with the control valve cavity, and the control valve assembly reciprocates in the control valve cavity and is intermittently communicated with a channel between the braking oil supply channel and the braking oil charge channel and a channel between the braking oil charge channel and the releasing oil drain channel.

2. The engine brake control apparatus of a multi-drive source according to claim 1, characterized in that: the control valve assembly includes the gliding control valve body in the control valve chamber, the control valve seat is installed to one side of control valve body, the control valve seat with install the control between the control valve body braking oil feed passageway with the one-way valve device that passageway intercommunication and cut off between the braking oil charge passageway, control valve return means sets up the control valve seat with between the braced frame, the opposite side of control valve body with braking drive passageway intercommunication.

3. The engine brake control apparatus of a multi-drive source according to claim 2, characterized in that: the control valve body is provided with a control valve oil supply hole communicated with the braking oil supply channel and a control valve oil filling hole communicated with the braking oil filling channel, a ball valve channel is communicated between the control valve oil supply hole and the control valve oil filling hole, and the one-way valve device controls the communication and the cut-off of the ball valve channel.

4. the engine brake control apparatus of a multi-drive source according to claim 3, characterized in that: the check valve device comprises a check ball valve for communicating and cutting off the ball valve channel, and a check valve return spring is arranged between the check ball valve and the control valve seat.

5. The engine brake control apparatus of a multi-drive source according to claim 1, characterized in that: the control valve return device comprises a control valve limiting plug fixedly mounted on the supporting frame, a control valve return spring is arranged between the control valve limiting plug and the control valve assembly, the releasing oil drainage channel is arranged on the outer side of the control valve limiting plug, and a limiting step for limiting the control valve assembly to continue moving is arranged on the inner side of the control valve limiting plug.

6. The engine brake control apparatus of a multi-drive source according to any one of claims 1 to 5, characterized in that: the driving source is an air source or a hydraulic source.

Technical Field

The invention belongs to the technical field of engines, and particularly relates to an engine brake control device with multiple driving sources.

Background

The total mass of modern automobiles is larger and larger, the speed of the modern automobiles is higher and higher, and the rolling resistance, the wind resistance and the internal friction loss of the modern automobiles are smaller and smaller, which means that the self-deceleration capacity of the modern automobiles is reduced; meanwhile, due to the increase of the total mass of the vehicle, the braking requirement of the vehicle under the condition of high speed and heavy load cannot be met only by a service braking system (commonly called foot brake) of the vehicle. The long-time frequent brake treading can cause the temperature of the brake block to rise, the brake effect to decline and even the brake failure to endanger the safety of people and vehicles!

In order to ensure the safety performance of the vehicle, a retarder or other auxiliary braking devices must be added, and the added retarder can shunt the load of the wheel brake, so that the temperature of the wheel friction brake is controlled within a safety range. The service brake system has the function of realizing the parking under the emergency condition, can absorb great power in a short time, but the absorbed power can be greatly reduced along with the increase of the brake duration time, and finally the service brake system can not meet the emergency parking requirement of the automobile on the downhill. The retarder has the function of mainly reducing or maintaining the speed of the vehicle on a long and steep slope in a certain speed range, is not a system for stopping the vehicle, and can be normally used on a flat road to reduce the speed of the vehicle. Although the power which can be absorbed in a short time is smaller than that of service braking, the absorbed power can be basically kept unchanged for a long time, particularly in the whole downhill process, the characteristic can meet different continuous braking requirements when a vehicle continuously descends, the retarder can meet the requirements, the use frequency of foot braking can be effectively reduced, and the problems that the temperature of a friction plate is increased, the braking effect is reduced and even the braking fails due to long-time use of the brake are avoided.

The retarder is almost the same as an engine and a gearbox in developed countries abroad and becomes the standard configuration of a commercial vehicle.

china implements national standard GB7258-2012 'Motor vehicle operation safety technical regulation' on 9/1 of 2012; the quality of the national quality supervision general administration of the people's republic of China and the national standard committee in 29.9.2017 jointly release and require that 1.1.2018.1.2018 execute GB7258-2017 regulations on the safety technology for motor vehicle operation, and make explicit provisions for auxiliary brakes in 7.5: passenger cars with the car length of more than 9m (the car length is more than 8m for special school buses), trucks with the total mass of more than or equal to 12000kg, special operation vehicles, dangerous goods transportation trucks with the total mass of more than 3500kg and the like are required to be provided with a retarder or other auxiliary braking devices. The performance of the auxiliary brake device of passenger cars with the car length of more than 9m and without passenger standing areas, dangerous goods transport trucks with the total mass of more than 3500kg and semi-trailer tractor equipment is to ensure that the cars pass the type II or type II A test specified in GB 12676.

The current commercial vehicle retarder mainly comprises an eddy current retarder, a hydraulic retarder and an engine retarder. The engine retarder can be divided into an engine brake and an exhaust brake, and the engine brake is divided into a compression release type brake and an air release type brake according to different brake implementation modes.

when the engine brake is opened, the engine ECU sends an instruction of stopping oil injection to the oil injector, the engine brake piston extends out to open the brake exhaust valve, gas in the engine cylinder escapes through the opened brake exhaust valve, no fuel is combusted in the engine cylinder, and therefore the engine does not provide traction force for the vehicle any more. The vehicle drives the crankshaft of the engine to rotate continuously through the driving wheel and the transmission belt, the kinetic energy input by the vehicle to the engine is gradually consumed in the aspects of pumping loss (power loss caused by throttling of gas in an intake stroke and an exhaust stroke) of the engine, self mechanical friction loss, irreversible loss generated in the compression and expansion processes, power loss of driving engine accessories (an oil pump, a water pump, an air compressor, a steering pump, a fan and the like), and the like, the engine which is originally a vehicle power source is changed into the air compressor which consumes the kinetic energy of the vehicle to slow the vehicle speed, or the engine does negative work at the moment, the torque of the engine for preventing the crankshaft from rotating is changed into braking torque, and the braking torque is transmitted to the driving wheel through the transmission system, so that the purpose of reducing the speed of the vehicle.

The brake oil circuit control device belongs to a core component of an engine brake, and the brake oil circuit control system belongs to a core method of the engine brake, and mainly has the following functions during braking: the control device controls the oil way to form sealed high-pressure oil in the brake control oil way, then the sealed high-pressure oil enters the brake piston device, the piston extends to expand a brake stroke under the action of oil pressure, and a brake exhaust valve is opened under the driving of high brake oil pressure at the top or a cam brake stroke, so that the engine brake is realized.

At present, a brake oil way control device mainly adopts a hydraulic control mode, the control mode is single, hydraulic control needs hydraulic oil to react, and the brake response is slow; the existing hydraulic control device mainly comprises an integrated hydraulic control device and a split type hydraulic control device. The integrated hydraulic control device is characterized in that a hydraulic system controlled by an electromagnetic valve is additionally arranged on an engine to form a hydraulic chain to control the opening of an exhaust valve, so that the braking function of the engine is realized, and the structure has the defects that pressure-bearing oil is always in a closed cavity in the long-term braking process, and the continuous braking effect of a brake can be influenced due to high-pressure leakage; the oil charge response speed is normal when the brake is opened. The split hydraulic control device mainly divides the oil inlet channel into two paths, which can lead to lower oil inlet pressure and low oil filling efficiency, and the overlong oil channel can lead to too long time for filling the whole oil channel, poor oil filling response speed, longer oil filling time and poorer braking sensitivity.

Disclosure of Invention

The invention aims to provide an engine brake control device which can adopt a plurality of driving sources with a plurality of air sources for driving, quick oil filling and quick brake response.

In order to solve the technical problems, the technical scheme of the invention is as follows: the engine brake control device with multiple driving sources comprises a supporting frame, wherein a control valve cavity is arranged in the supporting frame, a control valve assembly is slidably mounted in the control valve cavity, a brake driving channel for leading in the driving sources is arranged on one side of the control valve assembly on the supporting frame, the brake driving channel is communicated with the control valve cavity, a control valve return device is arranged between the supporting frame and the other side of the control valve assembly, and a release oil drainage channel communicated with the control valve cavity is arranged on the control valve return device; the support frame is also provided with a braking oil supply channel and a braking oil charge channel which are respectively communicated with the control valve cavity, and the control valve assembly reciprocates in the control valve cavity and is intermittently communicated with a channel between the braking oil supply channel and the braking oil charge channel and a channel between the braking oil charge channel and the releasing oil drain channel.

As the preferred technical scheme, the control valve assembly includes the control valve body that slides in the control valve chamber, the control valve seat is installed to one side of control valve body, control valve seat with install between the control valve body and control brake oil feed passageway with the check valve device that the passageway communicates and cuts off between the brake oil feed passageway, control valve resetting means sets up control valve seat with between the braced frame, the opposite side of control valve body with brake drive passageway intercommunication.

According to the preferable technical scheme, a control valve oil supply hole communicated with the braking oil supply channel and a control valve oil filling hole communicated with the braking oil filling channel are formed in the control valve body, a ball valve channel is communicated between the control valve oil supply hole and the control valve oil filling hole, and the one-way valve device controls communication and disconnection of the ball valve channel.

As the preferred technical scheme, the check valve device comprises a check ball valve for communicating and cutting off a ball valve channel, and a check valve return spring is arranged between the check ball valve and the control valve seat.

As a preferred technical scheme, the control valve returning device comprises a control valve limiting plug fixedly mounted on the support frame, a control valve returning spring is arranged between the control valve limiting plug and the control valve assembly, the oil release passage is arranged on the outer side of the control valve limiting plug, and a limiting step for limiting the control valve assembly to move continuously is arranged on the inner side of the control valve limiting plug.

Preferably, the driving source is an air source or a hydraulic source.

By adopting the technical scheme, the multi-drive-source engine brake control device comprises a support frame, wherein a control valve cavity is arranged in the support frame, a control valve assembly is arranged in the control valve cavity in a sliding manner, a brake driving channel for leading in a drive source is arranged on one side of the control valve assembly on the support frame, the brake driving channel is communicated with the control valve cavity, a control valve returning device is arranged between the support frame and the other side of the control valve assembly, and a release oil drainage channel communicated with the control valve cavity is arranged on the control valve returning device; the support frame is also provided with a braking oil supply channel and a braking oil charge channel which are respectively communicated with the control valve cavity, and the control valve assembly reciprocates in the control valve cavity and is intermittently communicated with a channel between the braking oil supply channel and the braking oil charge channel and a channel between the braking oil charge channel and the releasing oil drain channel; the invention has the beneficial effects that:

(1) The brake oil supply channel is filled with the engine oil all the time and keeps high oil pressure, and during braking, the engine oil in the brake oil supply channel enters the control valve assembly, so that the one-way ball valve can be quickly opened, the brake piston device can be quickly filled, the brake starting reaction time is reduced, and the brake response time is shortened;

(2) Because the brake driving channel is not associated with other channels, the brake driving channel can use engine oil or an air source as a driving source to drive the control valve assembly and is controlled by an electric signal, compared with the prior art which only uses the engine oil as the driving source, the brake driving channel has more selectivity of the driving source, and can be suitable for different use requirements of different conditions, different environments and the like; meanwhile, when the air source is selected as a driving source, compared with engine oil driving, the air source braking response time is obviously faster, and the flow of engine oil for braking can be reduced.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic diagram of the structure of an embodiment of the invention prior to braking;

FIG. 2 is a schematic structural view (check valve means open) of the brake of the embodiment of the present invention;

FIG. 3 is a schematic structural view after braking of the embodiment of the present invention (one-way valve means closed);

FIG. 4 is a schematic structural view of a control valve assembly according to an embodiment of the present invention;

In the figure: 1-a support frame; 2-controlling the valve cavity; 3-braking the drive channel; 4-releasing the oil drainage channel; 5-braking oil supply channel; 6-brake oil charge channel; 7-control valve body; 8-control valve seat; 9-control valve oil supply hole; 10-control valve oil charge hole; 11-ball valve channel; 12-one-way ball valve; 13-a one-way valve return spring; 14-control valve limit plug; 15-control valve return spring; 16-a limit step; 17-braking the piston device.

Detailed Description

The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1 to 3, an engine brake control device with multiple driving sources includes a support frame 1, in this embodiment, the support frame 1 is a rocker arm mechanism, and may also be other moving parts or fixed parts, a control valve cavity 2 is disposed in the support frame 1, a control valve assembly is slidably mounted in the control valve cavity 2, a brake driving passage 3 for passing in a driving source is disposed on one side of the control valve assembly on the support frame 1, the brake driving passage 3 is communicated with the control valve cavity 2, a control valve returning device is disposed between the support frame 1 and the other side of the control valve assembly, and a release oil drain passage 4 communicated with the control valve cavity 2 is disposed on the control valve returning device; the support frame 1 is also provided with a braking oil supply passage 5 and a braking oil charge passage 6 which are respectively communicated with the control valve cavity 2, and the control valve assembly reciprocates in the control valve cavity 2 and is intermittently communicated with a passage between the braking oil supply passage 5 and the braking oil charge passage 6 and a passage between the braking oil charge passage 6 and the releasing oil drain passage 4.

The control valve assembly includes control valve body 7 that slides in the control valve chamber 2, control valve seat 8 is installed to one side of control valve body 7, control valve seat 8 with install the control between the control valve body 7 braking oil feed passageway 5 with the one-way valve device that passageway intercommunication and cut off between the braking oil charge passageway 6, control valve return means sets up control valve seat 8 with between braced frame 1, the opposite side of control valve body 7 with braking drive passageway 3 intercommunication.

referring to fig. 4, a control valve oil supply hole 9 communicated with the brake oil supply channel 5 and a control valve oil filling hole 10 communicated with the brake oil filling channel 6 are formed in the control valve body 7, a ball valve channel 11 is communicated between the control valve oil supply hole 9 and the control valve oil filling hole 10, and the one-way valve device controls communication and disconnection of the ball valve channel 11.

The check valve device comprises a check ball valve 12 for communicating and cutting off the ball valve channel 11, and a check valve return spring 13 is arranged between the check ball valve 12 and the control valve seat 8.

The control valve return device comprises a control valve limiting plug 14 fixedly mounted on the supporting frame 1, a control valve return spring 15 is arranged between the control valve limiting plug 14 and the control valve assembly, the oil release channel 4 is arranged on the outer side of the control valve limiting plug 14, a limiting step 16 for limiting the control valve assembly to move continuously is arranged on the inner side of the control valve limiting plug 14, and when the control valve seat 8 is in contact with the limiting step 16, the control valve assembly is in a braking state.

The driving source is controlled by an engine ECU, the driving source is an air source or a hydraulic source, and the hydraulic source is selected as engine oil of the engine. Because the brake driving channel 3 is not related to other channels, the brake driving channel 3 can use oil or air source as a driving source to drive the control valve assembly and is controlled by an electric signal, compared with the prior art which only uses oil as the driving source, the brake driving channel has more selectivity of the driving source, and can be suitable for different use requirements of different conditions, different environments and the like; meanwhile, when the air source is selected as a driving source, compared with engine oil driving, the air source braking response time is obviously faster, and the flow of engine oil for braking can be reduced.

The working principle of the embodiment is as follows:

The brake oil supply channel 5 is connected with an oil supply system, so that the brake oil supply channel 5 is filled with engine oil all the time and keeps high pressure; the control valve assembly can reciprocate in the control valve cavity 2 and is used for providing selective communication between the brake oil supply passage 5 and the brake oil filling passage 6 and providing selective communication between the brake oil filling passage 6 and the release oil drainage passage 4; the brake driving channel 3 is controlled by an engine ECU, and the control valve assembly can be in a brake state and a non-brake state by intermittently introducing a driving source, and the specific working process is as follows:

When the brake is not applied: a driving source is not introduced into the brake driving channel 3, the control valve return spring 15 pushes the control valve assembly to be in a non-braking position, referring to fig. 1, a channel between the brake oil supply channel 5 and the brake oil charging channel 6 is disconnected, and a channel between the brake oil charging channel 6 and the release oil drainage channel 4 is communicated, but at the moment, no oil exists in the brake oil charging channel 6 and the release oil drainage channel 4, so that no oil pressure exists in a brake piston cavity of a brake piston device 17 communicated with the brake oil charging channel 6, and the brake piston device 17 is in a non-braking state; and at this time, the check ball valve 12 is in a closed state under the action of the check valve return spring 13.

during braking: the ECU sends a command to charge a driving source into the brake driving channel 3, the pressure of the driving source overcomes the acting force of the control valve return spring 15 to push the control valve assembly to be at a brake position, referring to fig. 2 and fig. 3, that is, the control valve seat 8 is in contact with the control valve limit plug 14 until the control valve assembly disconnects the channel between the brake oil charging channel 6 and the release oil discharging channel 4, meanwhile, the control valve oil supply hole 9 on the control valve body 7 is communicated with the brake oil supply channel 5, the control valve oil charging hole 10 on the control valve body 7 is communicated with the brake oil charging channel 6, and at this time, the ball valve channel 11 between the brake oil supply channel 5 and the brake oil charging channel 6 is cut off by the one-way valve device and is not communicated, referring to fig. 3; when the engine oil filled in the braking oil supply passage 5 enters the ball valve passage 11 through the control valve oil supply hole 9, the check valve device is opened, the state is shown in fig. 2, namely the check ball valve 12 is pushed to overcome the check valve return spring 13 to communicate the ball valve passage 11, the braking oil supply passage 5 is communicated with the braking oil charge passage 6, the engine oil in the ball valve passage 11 enters the braking oil charge passage 6 through the control valve oil charge hole 10 and then enters the braking piston device 17 to drive the piston, when the engine oil in the braking piston device 17 and the braking oil charge passage 6 reaches high pressure and meets the braking requirement, the check ball valve 12 is reset under the action of the check valve return spring 13 to cut off the ball valve passage 11, referring to fig. 3, the engine oil in the braking oil supply passage 5 cannot enter the braking oil charge passage 6, the brake oil feed channel 5 is still filled with oil for waiting for the next braking process.

when braking is finished: the ECU sends a command to stop supplying a driving source to the brake driving channel 3, the control valve assembly is reset under the action of the control valve return spring 15, the brake oil supply channel 5 and the brake oil filling channel 6 are still disconnected, but the brake oil filling channel 6 is communicated with the release oil drainage channel 4 again, the state is shown in the figure 1, at this time, hydraulic oil in the brake piston device 17 and hydraulic oil in the brake oil filling channel 6 are all discharged through the release oil drainage channel 4, and the braking of the brake piston device 17 is finished.

In the whole braking process, the one-way valve device is used for controlling the communication and the disconnection of the braking oil supply channel 5 and the braking oil filling channel 6, supplying engine oil for the braking piston device 17 and the braking oil filling channel 6, and forming and maintaining high-pressure oil to realize the braking effect; the opening and closing of the check valve device is automatically controlled by the check valve return spring 13 and the engine oil pressure.

the brake oil supply channel 5 is filled with the engine oil all the time and keeps high oil pressure, and during braking, the engine oil in the brake oil supply channel 5 enters the control valve assembly, so that the one-way ball valve 12 can be quickly opened, the brake piston device 17 can be quickly filled, the brake starting reaction time is shortened, and the brake response time is shortened.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.