阅读说明：本技术 一种液压全可变气门机构及发动机 (Hydraulic fully-variable valve mechanism and engine ) 是由 王兆宇 郑建松 王军鹏 李光明 訾银停 于 2020-12-31 设计创作，主要内容包括：本公开涉及一种液压全可变气门机构及发动机,包括气门组件,液压活塞,液压活塞,设置在液压系统中的控制阀,设置在液压系统中的液压挺柱和双滚轮摇臂,气门组件能够沿设定方向往复移动；液压活塞用于连接气门组件并驱动气门组件运动；液压活塞用于提供液压能；控制阀用于控制流向液压活塞的流量；液压挺柱用于沿设定方向驱动液压油运动,以提供液压油；滚轮摇臂能够沿自身转动轴线摆动,以驱动液压挺柱沿自身轴线方向往复移动,滚轮摇臂包括能够沿设定轴线转动的摇臂本体,摇臂本体上转动连接有第一滚轮,第一滚轮通过能够绕自身轴线转动的凸轮驱动,以提供摇臂本体沿自身转动轴线的转动力矩。(The utility model relates to a hydraulic fully variable valve mechanism and an engine, which comprises a valve component, a hydraulic piston, a control valve arranged in a hydraulic system, a hydraulic tappet and a double-roller rocker arm arranged in the hydraulic system, wherein the valve component can reciprocate along a set direction; the hydraulic piston is used for connecting the valve assembly and driving the valve assembly to move; the hydraulic piston is used for providing hydraulic energy; the control valve is used for controlling the flow to the hydraulic piston; the hydraulic tappet is used for driving hydraulic oil to move along a set direction so as to provide the hydraulic oil; the gyro wheel rocking arm can be followed self axis of rotation swing to drive hydraulic tappet along self axis direction reciprocating motion, the gyro wheel rocking arm is connected with first gyro wheel including can following the rocking arm body of setting for axis pivoted on the rocking arm body, and first gyro wheel is through can be around self axis pivoted cam drive, in order to provide the turning moment of rocking arm body along self axis of rotation.)

1. A hydraulic fully variable valve mechanism characterized by comprising:

a valve assembly capable of reciprocating in a set direction;

the hydraulic piston is used for connecting the valve assembly and driving the valve assembly to move;

the hydraulic system is used for providing hydraulic oil;

a control valve provided in the hydraulic system for controlling a flow rate to the hydraulic piston;

the hydraulic tappet is arranged in the hydraulic system and used for driving hydraulic oil to move along a set direction;

the gyro wheel rocking arm can be followed self axis of rotation swing to drive hydraulic tappet along self axis direction reciprocating motion, the gyro wheel rocking arm is connected with first gyro wheel including can following the rocking arm body of setting for axis pivoted on the rocking arm body, and first gyro wheel is through can be around self axis pivoted cam drive, in order to provide the turning moment of rocking arm body along self axis of rotation.

2. The hydraulic fully variable valve train according to claim 1, wherein the roller rocker arm is a double-roller rocker arm, and a second roller is mounted on the rocker arm body and used for contacting and driving the hydraulic tappet to move.

3. The hydraulic fully variable valve train according to claim 1, wherein the roller rocker arm is a single roller rocker arm, and one side of the rocker arm body close to the hydraulic tappet is provided with a circular arc side surface for contacting and driving the hydraulic tappet to move.

4. The hydraulic fully variable valve train according to claim 1, wherein the control valve comprises a valve core and a valve sleeve, the valve core and the valve sleeve form a pair, and the control valve is used for controlling oil discharge time.

5. The hydraulic fully variable valve train according to claim 4, wherein the valve spool is coaxially fixed with a control valve gear, the cam is coaxially fixed with a cam shaft, the rocker arm body and the rocker arm shaft gear are fitted over a rocker arm shaft, and the valve housing is driven by a control motor to realize rotation.

6. The hydraulic fully variable valve mechanism according to claim 5, wherein a worm gear structure is formed on the outer circumferential side surface of the valve sleeve, the control motor is coaxially fixed with the worm, and the control motor drives the valve sleeve to rotate through the transmission of the worm gear.

7. The hydraulic fully variable valve train according to claim 1, further comprising an accumulator disposed in the hydraulic system.

8. The hydraulic fully variable valve train according to claim 3, wherein a bleed hole cover is provided on the housing.

9. An engine characterized by using the hydraulic fully variable valve mechanism according to any one of claims 1 to 9.

Technical Field

The disclosure belongs to the technical field of engines, and particularly relates to a hydraulic fully-variable valve mechanism and an engine.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

The emission standards of more than six countries all require that an engine test cycle adopts a WHSC/WHTC cycle, the WHSC/WHTC cycle is obviously different from an ESC/ETC cycle widely adopted in the past in the aspects of working condition distribution and average temperature, and is more focused on emission detection under low-speed and low-load working conditions, and in order to meet the requirements of emission regulations, a diesel engine plant needs to improve the exhaust temperature of the WHSC/WHTC cycle, improve the conversion efficiency of nitrogen oxides and reduce harmful emission of a diesel engine. The regulation of the air inlet flow control and the exhaust temperature is an effective control means, and the simple control method of an air inlet throttle valve is generally adopted at present. The air inlet throttle valve is arranged at the front end of the air inlet pipe and is far away from the air cylinder, so that pumping loss is caused, and the oil consumption is not favorable.

The inventor knows that the existing diesel engine focuses on improving the combustion process in all countries due to the consideration of energy conservation, and the Atkinson cycle is one of the accepted main means for realizing the high-efficiency thermodynamic cycle of the diesel engine. The high-power diesel engine generally adopts an arrangement structure shown in figure 6, namely a fixed rocker arm shaft is adopted, a rocker arm is sleeved on the rocker arm shaft, one end of the rocker arm is driven by a cam shaft through a roller to enable the rocker arm to do reciprocating rotary motion around the rocker arm shaft, and the other end of the rocker arm pushes a valve to open and close through a valve bridge.

Disclosure of Invention

The present disclosure is directed to a hydraulic fully variable valve train and an engine, which can solve at least one of the above problems.

To achieve the above objects, one or more embodiments of the present disclosure provide a hydraulic fully variable valve train including a valve assembly, a hydraulic piston, a control valve provided in a hydraulic system, a hydraulic tappet and a roller rocker arm provided in the hydraulic system, the valve assembly being capable of reciprocating in a set direction; the hydraulic piston is used for connecting the valve assembly and driving the valve assembly to move; the control valve is used for controlling the flow to the hydraulic piston; the hydraulic tappet is used for driving hydraulic oil to move along a set direction so as to provide the hydraulic oil; the gyro wheel rocking arm can be followed self axis of rotation swing to drive hydraulic tappet along self axis direction reciprocating motion, the gyro wheel rocking arm is connected with first gyro wheel including can following the rocking arm body of setting for axis pivoted on the rocking arm body, and first gyro wheel is through can winding self pivoted cam drive, in order to provide the turning moment of rocking arm body along self axis of rotation.

As a further improvement, the control valve comprises a valve core and a valve sleeve, the valve core and the valve sleeve form a pair part, and the control valve is used for controlling oil unloading time.

As a further improvement, the valve core and the gear of the control valve are coaxially fixed, the cam and the cam shaft are coaxially fixed, the rocker arm body and the gear of the rocker arm shaft are sleeved on the rocker arm shaft, and the valve sleeve is driven by the control motor to realize rotation.

As a further improvement, a worm gear structure is formed on the side face of the outer circle of the valve sleeve, the control motor and the worm are coaxially fixed, and the control motor drives the valve sleeve to rotate through the transmission of the worm gear and the worm.

As a further improvement, the positional relationship of the cam, the double rocker roller, the hydraulic tappet and the control valve is set as follows: when the hydraulic tappet is fed to provide hydraulic energy, the control valve is opened.

One or more embodiments of the present disclosure also provide an engine using the hydraulic fully variable valve mechanism described above.

The beneficial effects of one or more of the above technical solutions are as follows:

the hydraulic valve control system has the advantages that the cam, the double-rocker-arm roller, the hydraulic tappet and the hydraulic piston are matched to convert the rotation of the cam into the reciprocating linear motion of the hydraulic piston, and under the condition that the rotating speed of the cam is not changed, the opening and closing time and size of the valve can be conveniently adjusted by adjusting a control valve in a hydraulic system, so that the function of the variable valve can be conveniently realized. The control valve is in a structural form consisting of a valve core and a valve sleeve, the valve sleeve is driven by a control motor to adjust the flow of the control valve, and the valve core and a cam shaft synchronously rotate under the action of a gear transmission mechanism.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure.

FIG. 1 is a schematic structural diagram of a fully variable valve train in accordance with one or more embodiments of the present disclosure;

FIG. 2 is a schematic view of a synchronous gear drive mechanism according to one or more embodiments of the present disclosure;

FIG. 3 is a schematic diagram of a dual roller rocker arm according to one or more embodiments of the present disclosure;

FIG. 4 is a schematic structural view of a single roller cambered surface rocker arm in one or more embodiments of the present disclosure

Fig. 5 is a schematic view of the manner in which a valve housing and motor are mated in accordance with one or more embodiments of the present disclosure;

fig. 6 is a schematic structural view of a conventional swing arm structure in the prior art.

In the figure, 1, a valve; 2. a valve bridge; 3. an accumulator; 4. a housing; 5. a vent hole cover; 6. controlling the motor; 7. a control valve; 8. hydraulic tappet; 9. a second roller; 9A, a first roller; 10. a double roller rocker arm; 11. a camshaft; 12. a rocker shaft; 13. a control valve gear; 14. a rocker shaft gear; 15. a camshaft gear; 16. a conventional rocker arm; 17. a hydraulic piston; 18. a valve housing; 19. a motor shaft.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Example 1

As shown in fig. 1 to 5, the present embodiment provides a hydraulic fully variable valve mechanism, which includes a valve assembly, a hydraulic piston 17, a control valve 7 provided in a hydraulic system, a hydraulic tappet 8 and a roller rocker arm 10 provided in the hydraulic system, the valve 1 assembly being capable of reciprocating in a set direction; the hydraulic piston 17 is used for connecting the valve 1 assembly and driving the valve 1 assembly to move; the hydraulic piston 17 is used for providing hydraulic energy; the control valve 7 is used for controlling the flow to the hydraulic piston 17; the hydraulic tappet 8 is used for driving hydraulic oil to move along a set direction so as to provide the hydraulic oil; the gyro wheel rocking arm can be followed self axis of rotation swing to drive hydraulic tappet along self axis direction reciprocating motion, the gyro wheel rocking arm is connected with first gyro wheel including can following the rocking arm body of setting for axis pivoted on the rocking arm body, and first gyro wheel is through can winding self pivoted cam drive, in order to provide the turning moment of rocking arm body along self axis of rotation.

In this embodiment, the roller rocker arm is a double-roller rocker arm, and the rocker arm body is provided with a second roller for contacting and driving the hydraulic tappet to move.

In the embodiment, the valve 1 assembly comprises two valves 1, and the two valves 1 are connected through a valve bridge 2 to form a whole.

In this embodiment, the valve 1 assembly further comprises a housing 4, and the housing 4 has an installation space therein, and the valve 1 assembly is installed in the installation space.

In the embodiment, the control valve 7 comprises a valve core and a valve sleeve 18, the valve core and the valve sleeve 18 form a mating part, and the control valve 7 is used for controlling oil discharge time.

In this embodiment, the valve core is coaxially fixed with the control valve gear 13, the cam is coaxially fixed with the camshaft 11, the cam and the camshaft are integrated, the rocker shaft is fixed, and the rocker shaft 12 and the gear 14 are both sleeved on the rocker shaft and rotate around the rocker shaft. The rocker shaft 12 and the valve core are meshed with the valve core through a gear, and the valve core is driven to rotate through a rocker shaft gear and a control valve gear under the drive of a cam shaft gear; the valve sleeve 18 is driven by the control motor 6 to effect rotation.

Specifically, a rocker shaft gear is coaxially fixed outside the rocker shaft, a camshaft gear is coaxially fixed outside the camshaft, and the rocker shaft gear, the camshaft gear and the control valve gear form a synchronous gear structure.

In this embodiment, a worm gear structure is formed on the outer circumferential side surface of the valve sleeve 18, a motor shaft of the control motor 6 is coaxially fixed with the worm, and the control motor 6 drives the valve sleeve 18 to rotate through the transmission of the worm gear and the worm.

In the present embodiment, the positional relationship of the cam, the double rocker roller, the hydraulic lifter 8, and the control valve 7 is set to: when the hydraulic tappet 8 is fed to provide hydraulic energy, the control valve 7 is opened.

In the present embodiment, an accumulator 3 is also included, which is arranged in the hydraulic system.

Specifically, the double-roller rocker arm 10 is sleeved on a rocker arm shaft 12, a camshaft 11 further drives the double-roller rocker arm 10 to rotate around the rocker arm shaft 12 through a driving roller, and then another roller on the rocker arm drives a hydraulic tappet to move so as to generate high-pressure oil, the high-pressure oil drives a hydraulic piston of an actuating mechanism to move, a control valve is used as a control mechanism and comprises a valve core and a valve sleeve, the valve core and the valve sleeve are used as a pair of coupling parts and play a role in controlling oil drainage time, wherein the valve core is connected with a control valve gear 13 and driven through a camshaft gear 15 and a rocker arm shaft gear 14 and synchronously rotates with the camshaft, the valve sleeve is driven by a control motor 6 to be adjusted within a certain range, and a worm gear and worm transmission mode is adopted between the valve sleeve and the control motor.

The rocker arm is a double-roller rocker arm, and in other embodiments, other forms such as a single-roller cambered rocker arm can be adopted, as shown in fig. 4 and 5. The roller rocker arm is a single roller rocker arm, one side of the rocker arm body, which is close to the hydraulic tappet, is provided with an arc side surface, and the arc side surface is used for contacting and driving the hydraulic tappet to move.

The synchronous transmission gear mechanism, the camshaft gear can be with camshaft integrative, also can be interference fit pressure equipment on the camshaft. The rocker shaft gear is sleeved on the rocker shaft and used as an idle gear to rotate around the rocker shaft.

The control motor 6 is vertically installed on the housing, and the cooperation with the valve sleeve adopts the worm and gear cooperation mode, as shown in fig. 6.

And the shell is provided with a gas discharge hole cover.

The working principle is as follows: the camshaft 11 further drives the double-roller rocker arm 10 to rotate around the rocker shaft 12 through the driving rollers, and then the other roller on the rocker arm drives the hydraulic tappet to move, so that high-pressure oil is generated, the high-pressure oil drives the hydraulic piston of the actuating mechanism to move, the hydraulic piston pushes the valve bridge, and the valve bridge pushes the two valves to move together. The control valve as a control mechanism consists of a valve core and a valve sleeve, the valve core and the valve sleeve as a pair of coupling parts play a role in controlling oil drainage time, wherein the valve core is connected with a control valve gear 13 and is driven by a cam shaft gear 15 and a rocker shaft gear 14 and synchronously rotates with a cam shaft, the valve sleeve is driven by a control motor 6 to be adjusted within a certain rotation angle range, and a worm wheel and worm transmission mode is adopted between the valve sleeve and the drive motor.

Example 2

The present embodiment provides an engine using the hydraulic fully variable valve mechanism described in embodiment 1.

Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.