CN214366260U - Hydraulic fully-variable valve mechanism and engine - Google Patents
Hydraulic fully-variable valve mechanism and engine Download PDFInfo
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- CN214366260U CN214366260U CN202023343648.9U CN202023343648U CN214366260U CN 214366260 U CN214366260 U CN 214366260U CN 202023343648 U CN202023343648 U CN 202023343648U CN 214366260 U CN214366260 U CN 214366260U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 16
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000006872 improvement Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
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.
Description
Technical Field
The utility model belongs to the technical field of the engine, concretely relates to hydraulic pressure fully variable valve mechanism and 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 utility model aims at providing a hydraulic pressure fully variable valve mechanism and engine can solve one of above-mentioned technical problem at least.
In order to achieve the above object, one or more embodiments of the present invention provide a hydraulic fully variable valve train, including a valve assembly, a hydraulic piston, a control valve disposed in a hydraulic system, a hydraulic tappet and a roller rocker arm disposed in the hydraulic system, wherein the valve assembly is 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 invention further provide an engine using the above-mentioned hydraulic fully variable valve train.
The beneficial effects of one or more of the above technical solutions are as follows:
the utility model discloses in adopt cam, two rocking arm gyro wheels, hydraulic tappet and hydraulic piston's cooperation, convert the rotation of cam into hydraulic piston's reciprocal linear motion, under the unchangeable circumstances of cam rotational speed, be convenient for through the control valve among the regulation hydraulic system, adjust the time and the size of valve switching, be convenient for realize variable air valve's function.
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 form a part of the specification, are provided to provide a further understanding of the invention, and are included to explain the illustrative embodiments and the description of the invention, and not to constitute a limitation of the invention.
Fig. 1 is a schematic structural diagram of a fully variable valve train according to one or more embodiments of the present invention;
FIG. 2 is a schematic view of a synchronous gear drive according to one or more embodiments of the present disclosure;
fig. 3 is a schematic structural view of a dual roller rocker arm in accordance with one or more embodiments of the present invention;
FIG. 4 is a schematic diagram of a single roller rocker with cambered surface according to one or more embodiments of the present invention
Fig. 5 is a schematic view of the manner in which the valve housing and motor are coupled in accordance with one or more embodiments of the present invention;
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 invention. 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 invention 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 in accordance with the invention. 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 invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
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. An engine characterized by using the hydraulic fully variable valve mechanism according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023343648.9U CN214366260U (en) | 2020-12-31 | 2020-12-31 | Hydraulic fully-variable valve mechanism and engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023343648.9U CN214366260U (en) | 2020-12-31 | 2020-12-31 | Hydraulic fully-variable valve mechanism and engine |
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| CN214366260U true CN214366260U (en) | 2021-10-08 |
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| CN202023343648.9U Active CN214366260U (en) | 2020-12-31 | 2020-12-31 | Hydraulic fully-variable valve mechanism and engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696246A (en) * | 2020-12-31 | 2021-04-23 | 龙口中宇热管理系统科技有限公司 | Hydraulic fully-variable valve mechanism and engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696246A (en) * | 2020-12-31 | 2021-04-23 | 龙口中宇热管理系统科技有限公司 | Hydraulic fully-variable valve mechanism and engine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A hydraulic fully variable valve mechanism and engine Granted publication date: 20211008 Pledgee: Wang Xiaodong Pledgor: LONGKOU ZHONGYU THERMAL MANAGEMENT SYSTEM TECHNOLOGY Co.,Ltd. Registration number: Y2024980021236 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |