CN111963270A - Active pressure reducing device - Google Patents
Active pressure reducing device Download PDFInfo
- Publication number
- CN111963270A CN111963270A CN202010884762.8A CN202010884762A CN111963270A CN 111963270 A CN111963270 A CN 111963270A CN 202010884762 A CN202010884762 A CN 202010884762A CN 111963270 A CN111963270 A CN 111963270A
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- CN
- China
- Prior art keywords
- active pressure
- rocker arm
- adjusting screw
- latch piston
- pressure reducing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000006837 decompression Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to an active pressure reducing device which comprises a rocker arm and an active pressure reducing device, wherein the active pressure reducing device is positioned on one side of the rocker arm, the active pressure reducing device comprises a shell, an air inlet, a plug, an adjusting screw, a latch piston and a latch piston spring, the air inlet is arranged at one end of the shell, the latch piston is arranged at the lower end of the air inlet, the latch piston spring is arranged in the latch piston, the plug is arranged at one end, away from the latch piston spring, of the latch piston, the plug is fixed on the shell, the adjusting screw is positioned at the upper end of the latch piston, penetrates through the rocker arm and is fixed on the rocker arm, and the lower end of the adjusting screw extends into the shell. The active decompression device reduces the amplitude of the engine during starting, shortens the starting time of the engine, and improves the NVH performance of the engine.
Description
Technical Field
The invention relates to a valve rocker, in particular to an active pressure reducing device.
Background
The valve rocker is an essential part when the engine works, and is an important part for driving the valve to open and close. At present, the working process of the existing valve rocker works by matching with the opening and closing of an actuated valve, and when an engine works, the valve rocker is driven to work to seal a cylinder of the engine so as to convert energy after fuel combustion into kinetic energy of the engine. However, when the engine is started, especially during cold start, a large starting current is needed to drive the starter to overcome the work done by compressing the cylinder, and when the engine is flamed out, the piston still compresses the gas in the cylinder after fuel cut, so that the engine shakes, and the NVH performance of the vehicle is affected when the vehicle is flamed out.
Chinese patent CN201810089101.9 discloses a valve rocker, which comprises a shaft hole, a rocker, a valve push rod hole, and a valve top column seat; the shaft hole is positioned in the center of the valve rocker and plays a role in fixing the valve rocker, and the shaft hole is a fulcrum of the valve rocker motion; the valve push rod hole is positioned on the left side of the valve rocker and drives the valve piston to do reciprocating motion, so that ventilation and air closing of the engine are realized; the valve support pillar is positioned on the right side of the valve rocker and drives the valve rocker to move through the rotation of the cam shaft, and the valve support pillar depends on the fulcrum action of the shaft hole. The engine has longer pneumatic and flameout time and poor NVH performance.
Disclosure of Invention
In view of the above disadvantages of the prior art, it is an object of the present invention to provide an active decompression device that maintains an exhaust valve in an open state when an engine is started, ensures that an engine cylinder is in a decompressed state, reduces the torque required to be overcome by a crankshaft, and allows for faster engine speed climb; meanwhile, the engine valve is kept open when the engine is flamed out, and the NVH performance of the engine is improved.
In order to achieve the above and other related objects, the present invention provides an active pressure reducing device, including a rocker arm and an active pressure reducing device, the active pressure reducing device is located at one side of the rocker arm, the active pressure reducing device includes a housing, an air inlet, a plug, an adjusting screw, a latch piston and a latch piston spring, the air inlet is arranged at one end of the housing, the latch piston is arranged at the lower end of the air inlet, the latch piston spring is arranged in the latch piston, the plug is arranged at one end of the latch piston far away from the latch piston spring, the plug is fixed on the housing, the adjusting screw is located at the upper end of the latch piston, the adjusting screw penetrates through the rocker arm and is fixed on the rocker arm, the lower end of the adjusting screw extends into the housing, the adjusting screw is located at the upper end of the latch piston, and the adjusting screw penetrates, and is fixed on the rocker arm, and the lower end of the rocker arm extends into the shell.
Preferably, the middle position of casing is equipped with first hole of stepping down, be equipped with directly over the first hole of stepping down adjusting screw.
Preferably, the one end that the casing kept away from the jam is equipped with the circular arc bridge, the circular arc bridge upside is the flat top, just is in the intermediate position of flat top is equipped with the second hole of stepping down.
Preferably, one side of the rocker arm, which is close to the active pressure reducing device, is provided with an adjusting screw bump, and the adjusting screw is fixed on the adjusting screw bump.
Preferably, the rocker arm is provided with a rocker arm hole, and the rocker arm hole and the central axis of the circular arc bridge are positioned on the same straight line.
Preferably, the latch further comprises a pin located on an upper side of the latch piston, the pin being fixed to the housing.
Preferably, one end, close to the plug, of the latch piston is provided with a yielding boss, and the diameter of the yielding boss is smaller than that of the end, close to the plug, of the latch piston.
In summary, the active pressure reducing device of the invention has the following beneficial effects: by arranging the active decompression device, the exhaust valve is ensured to be in an open state when the engine is started, the whole engine cylinder is in a decompression state, the torque required to be overcome by a crankshaft when the engine is started is reduced, the rotating speed of the engine can climb more quickly, and the starting time of the engine is shortened; through setting up initiative pressure relief device, guaranteed that the valve is in the open mode when the engine is stalled, optimized the NVH performance when the engine stalls, improved user's comfort level.
Drawings
Fig. 1 is a schematic structural diagram of an active pressure reduction device.
Fig. 2 is a cross-sectional view of the active pressure relief device, showing the condition when the set screw is in contact with the work area.
Fig. 3 is a cross-sectional view of the latch piston and latch piston spring.
Fig. 4 is a sectional view of the housing for showing the first and second abdicating holes.
Fig. 5 is a sectional view of the active pressure reducing device, which is used for displaying the state when the adjusting screw contacts with the start-stop area.
1. A rocker arm; 11. adjusting the screw boss;
2. an active pressure reduction device; 21. a housing; 22. an air inlet; 23. blocking; 24. an adjusting screw; 25. a latch piston; 26. a latch piston spring; 27. a pin; 211. a first abdicating hole; 212. a circular arc bridge; 213. a second abdicating hole; 251. a yielding boss; 252. a working area; 253. a start-stop area; 2121. flat top.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 5. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The invention relates to an active decompression device, which comprises a rocker arm 1 and an active decompression device 2, wherein the active decompression device 2 is positioned on one side of the rocker arm 1, and the active decompression device 2 is used for adjusting the swing stroke of the rocker arm 1 so as to control the amplitude of the rocker arm 1 during normal operation and start and stop of an engine.
In this embodiment, as shown in fig. 1, the active pressure reducing device 2 includes a housing 21, an air inlet 22, a plug 23, an adjusting screw 24, a latch piston 25 and a latch piston spring 26, the air inlet 22 is disposed at one end of the housing 21, the latch piston 25 can be pushed by introducing high-pressure air into the air inlet 22, different positions of the latch piston 25 are in contact with the adjusting screw 24, and the swing stroke of the rocker arm 1 is adjusted, the latch piston 25 is disposed at a lower end of the air inlet 22, the latch piston spring 26 is disposed in the latch piston 25, the latch piston spring 26 is configured to drive the latch piston 25 to reset, when the high-pressure air pushes the latch piston 25 to compress the latch piston spring 26, the latch piston spring 26 can push the latch piston 25 to move after removing the high-pressure air, since the working area 252 and the start-stop area 253 are arranged on the upper surface of the latch piston 25, when the working area 252 or the start-stop area 253 contacts the lower end of the adjusting screw 24, the swing stroke of the rocker arm 1 is different, so that the swing stroke of the rocker arm 1 can be adjusted by changing the contact position of the latch piston 25 and the adjusting screw 24, the plug 23 is arranged at one end of the latch piston 25, which is far away from the latch piston spring 26, the plug 23 is fixed on the housing 21, when the latch piston 25 and the latch piston spring 26 are placed in the corresponding position in the housing 21, the plug 23 is fixed at the corresponding position in the housing 21, so as to prevent the latch piston 25 and the latch piston spring 26 from sliding out of the housing 21, and influence the operation of the whole active pressure reducing device, and the adjusting screw 24 is arranged at the upper end of the latch piston 25, the adjusting screw 24 passes through the rocker arm 1, is fixed on the rocker arm 1, and can be fixed through threads, and the lower end of the adjusting screw 24 extends into the housing 21, so that the lower end of the adjusting screw 24 can contact the latch piston 25 when the valve of the rocker arm 1 is opened.
In the present embodiment, as shown in fig. 3, the upper side of the latch piston 25 is stepped, and includes a start-stop area 253 and a working area 252, when the adjusting screw 24 contacts the start-stop area 253 or the working area 252, the swing strokes of the rocker arm 1 are different, and the height of the upper end of the start-stop area 253 is higher than that of the upper end of the working area 252.
In this embodiment, as shown in fig. 2 and 4, a first yielding hole 211 is provided at the middle position of the housing 21, and the adjusting screw 24 is provided right above the first yielding hole 211 to ensure that the adjusting screw 24 can pass through the first yielding hole 211 to contact the latch piston 25.
In this embodiment, as shown in fig. 1 and 4, an arc bridge 212 is disposed at an end of the housing 21 away from the plug 23, the arc bridge 212 is fixed to the rocker shaft, an upper side of the arc bridge 212 is a flat top 2121, a second abdicating hole 213 is disposed at a middle position of the flat top 2121, and the housing 21 can be fixed to the rocker shaft by passing a screw through the second abdicating hole 213.
In this embodiment, an adjusting screw protrusion 11 is disposed on one side of the rocker arm 1 close to the active pressure reducing device 2, the adjusting screw 24 is fixed on the adjusting screw protrusion 11, and the adjusting screw protrusion 11 is used for fixing the adjusting screw 24.
In this embodiment, the rocker arm 1 is provided with a rocker arm hole, and the rocker arm hole and the central axis of the arc bridge 212 are located on the same straight line.
In this embodiment, as shown in fig. 2, the locking device further includes a pin 27, the pin 27 is located on the upper side of the latch piston 25, the pin 27 is fixed on the housing 21, and the pin 27 is used to prevent the latch piston 25 from rotating during operation, so as to ensure that the fixed side of the latch piston 25 contacts with the first relief hole 211.
In this embodiment, as shown in fig. 3, an abdicating boss 251 is disposed at one end of the latch piston 25 close to the plug 23, a diameter of the abdicating boss 251 is smaller than a diameter of the latch piston 25 close to one end of the plug 23, and the abdicating boss 251 is used for assisting the high-pressure air to push the latch piston 25 to move.
When the engine starts or stops working, as shown in fig. 2, high-pressure air is introduced into the air inlet 22, the high-pressure air pushes one end of the latch piston 25, and further pushes the latch piston 25 to compress the latch piston spring 26, so that the start-stop area 253 of the latch piston 25 moves to the lower end of the first abdicating hole 211, when the engine cylinder pushes the rocker arm 1 to rotate, the rocker arm 1 drives the adjusting screw 24 to move downwards, the lower end of the adjusting screw 24 passes through the first abdicating hole 211 to contact with the start-stop area 253, at this time, the valve of the engine is in an open state, the engine cylinder is in a decompression state, if the engine is in a start stage, because the valve is open, the crankshaft torque of the engine is reduced, the engine climbs faster, the start time of the engine is shortened, if the engine is in a stop stage, the engine valve is also in an open state, the crankshaft torque of the engine is also reduced, and the NVH performance of the engine is optimized; if the engine works normally, the high-pressure air is removed from the air inlet 22, the latch piston 25 is pushed by the latch piston spring 26, the latch piston 25 resets, the working area 252 moves below the first abdicating hole 211, and when the rocker arm works, the lower end of the adjusting screw 24 contacts the working area 252, so that the rocker arm 1 works normally, as shown in fig. 5.
In summary, the active pressure reducing device of the invention has the following beneficial effects: by arranging the active decompression device, the valve is ensured to be in an open state when the engine is started, the whole engine cylinder is in a decompression state, the torque required to be overcome by a crankshaft when the engine is started is reduced, the rotating speed of the engine can climb more quickly, and the starting time of the engine is shortened; through setting up initiative pressure relief device, realized being in the open mode to the valve when engine start-up and flame-out, optimized the NVH performance when the engine flame-out, improved user's comfort level.
Therefore, the invention overcomes various defects of the prior art and has high industrial utilization value and practical value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The active pressure reducing device is characterized by comprising a rocker arm (1) and an active pressure reducing device (2), wherein the active pressure reducing device (2) is positioned on one side of the rocker arm (1), the active pressure reducing device (2) comprises a shell (21), an air inlet (22), a plug (23), an adjusting screw (24), a latching piston (25) and a latching piston spring (26), the air inlet (22) is arranged at one end of the shell (21), the latching piston (25) is arranged at the lower end of the air inlet (22), the latching piston spring (26) is arranged in the latching piston (25), the plug (23) is arranged at one end, far away from the latching piston spring (26), of the latching piston (25), the plug (23) is fixed on the shell (21), and the adjusting screw (24) is positioned at the upper end of the latching piston (25), and the adjusting screw (24) penetrates through the rocker arm (1) and is fixed on the rocker arm (1), and the lower end of the adjusting screw extends into the shell (21).
2. The active pressure relief device of claim 1, wherein: the upper side of the latching piston (25) is stepped.
3. An active pressure relief device according to claim 1 or 2, wherein: the middle position of casing (21) is equipped with first hole (211) of stepping down, be equipped with directly over first hole (211) of stepping down adjusting screw (24).
4. An active pressure relief device according to claim 3, wherein: casing (21) are kept away from the one end of jam (23) is equipped with circular arc bridge (212), circular arc bridge (212) upside is flat top (2121), just is in the intermediate position of flat top (2121) is equipped with second hole of stepping down (213).
5. The active pressure relief device of claim 1, wherein: and one side of the rocker arm (1) close to the active pressure reducing device (2) is provided with an adjusting screw bump (11), and the adjusting screw (24) is fixed on the adjusting screw bump (11).
6. The active pressure relief device of claim 4, wherein: the rocker arm (1) is provided with a rocker arm hole, and the rocker arm hole and the central axis of the arc bridge (212) are positioned on the same straight line.
7. An active pressure relief device according to claim 2, wherein: and the locking device also comprises a pin (27), wherein the pin (27) is positioned on the upper side of the latching piston (25), and the pin (27) is fixed on the shell (21).
8. The active pressure relief device of claim 1, wherein: one end, close to the plug (23), of the latch piston (25) is provided with a yielding boss (251), and the diameter of the yielding boss (251) is smaller than that of one end, close to the plug (23), of the latch piston (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884762.8A CN111963270B (en) | 2020-08-28 | 2020-08-28 | Active pressure reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884762.8A CN111963270B (en) | 2020-08-28 | 2020-08-28 | Active pressure reducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111963270A true CN111963270A (en) | 2020-11-20 |
| CN111963270B CN111963270B (en) | 2024-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010884762.8A Active CN111963270B (en) | 2020-08-28 | 2020-08-28 | Active pressure reducing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111963270B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441840A (en) * | 2020-04-29 | 2020-07-24 | 皆可博(苏州)车辆控制系统有限公司 | Air leakage brake integrated on rocker arm seat |
| US20240077005A1 (en) * | 2021-01-15 | 2024-03-07 | Eaton Intelligent Power Limited | Shifting stopper latch assembly for rocker arm |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340017A (en) * | 1979-06-19 | 1982-07-20 | Honda Giken Kogyo Kabushiki Kaisha | Starting decompression device for a four cycle engine |
| US20030145820A1 (en) * | 2002-02-06 | 2003-08-07 | Honda Giken Kogyo Kabushiki Kaisha | Internal combustion engine provided with decompressing mechanism and method of adjusting valve lift for decompression |
| US20100186710A1 (en) * | 2007-06-26 | 2010-07-29 | Volvo Lastvagnar Ab | Exhaust valve mechanism for an internal combustion engine |
| CN103917762A (en) * | 2011-09-21 | 2014-07-09 | 雅各布斯车辆系统公司 | Method and system for engine cylinder decompression |
| JP2015218647A (en) * | 2014-05-16 | 2015-12-07 | トヨタ自動車株式会社 | Internal combustion engine decompression device |
| EP2955343A2 (en) * | 2014-04-24 | 2015-12-16 | Sanyang Motor Co., Ltd. | Engine with decompression devices |
| CN212359891U (en) * | 2020-08-28 | 2021-01-15 | 皆可博(苏州)车辆控制系统有限公司 | Active pressure reducing device |
-
2020
- 2020-08-28 CN CN202010884762.8A patent/CN111963270B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340017A (en) * | 1979-06-19 | 1982-07-20 | Honda Giken Kogyo Kabushiki Kaisha | Starting decompression device for a four cycle engine |
| US20030145820A1 (en) * | 2002-02-06 | 2003-08-07 | Honda Giken Kogyo Kabushiki Kaisha | Internal combustion engine provided with decompressing mechanism and method of adjusting valve lift for decompression |
| US20100186710A1 (en) * | 2007-06-26 | 2010-07-29 | Volvo Lastvagnar Ab | Exhaust valve mechanism for an internal combustion engine |
| CN103917762A (en) * | 2011-09-21 | 2014-07-09 | 雅各布斯车辆系统公司 | Method and system for engine cylinder decompression |
| EP2955343A2 (en) * | 2014-04-24 | 2015-12-16 | Sanyang Motor Co., Ltd. | Engine with decompression devices |
| JP2015218647A (en) * | 2014-05-16 | 2015-12-07 | トヨタ自動車株式会社 | Internal combustion engine decompression device |
| CN212359891U (en) * | 2020-08-28 | 2021-01-15 | 皆可博(苏州)车辆控制系统有限公司 | Active pressure reducing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441840A (en) * | 2020-04-29 | 2020-07-24 | 皆可博(苏州)车辆控制系统有限公司 | Air leakage brake integrated on rocker arm seat |
| CN111441840B (en) * | 2020-04-29 | 2024-09-10 | 皆可博(苏州)车辆控制系统有限公司 | Gas leakage brake integrated on rocker arm seat |
| US20240077005A1 (en) * | 2021-01-15 | 2024-03-07 | Eaton Intelligent Power Limited | Shifting stopper latch assembly for rocker arm |
| US12060814B2 (en) * | 2021-01-15 | 2024-08-13 | Eaton Intelligent Power Limited | Shifting stopper latch assembly for rocker arm |
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| Publication number | Publication date |
|---|---|
| CN111963270B (en) | 2024-09-27 |
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