CN112228178B - Engine valve driving rocker arm - Google Patents
Engine valve driving rocker arm Download PDFInfo
- Publication number
- CN112228178B CN112228178B CN202010393665.9A CN202010393665A CN112228178B CN 112228178 B CN112228178 B CN 112228178B CN 202010393665 A CN202010393665 A CN 202010393665A CN 112228178 B CN112228178 B CN 112228178B
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- China
- Prior art keywords
- rocker arm
- lock pin
- hole
- column
- arm column
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Classifications
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- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
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- 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
- F01L13/0005—Deactivating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/06—Cutting-out cylinders
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- 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
- F01L13/0005—Deactivating valves
- F01L2013/001—Deactivating cylinders
Abstract
The invention relates to an engine valve driving rocker arm, which comprises a rocker arm column, a lock pin and a rocker arm body, wherein a rocker arm column hole is formed in the rocker arm body, a gap is formed in the position, corresponding to the lock pin hole, of the middle part of the rocker arm column in the rocker arm column hole, and a locking mechanism is formed by the lock pin, so that the motion of the rocker arm is allowed to be applied to a valve through the rocker arm column; after the control oil passage is communicated, the lock pin overcomes the pre-tightening force of the lock pin spring under the action of oil pressure to unlock the locking mechanism; the motion of the rocker arm cannot be applied to the rocker arm column, the rocker arm column slides in the shell hole, and fuel injection of the cylinder is stopped at the same time, so that cylinder stopping is realized; the valve rocker has a simple structure, can realize the stop of the valve motion and the cylinder deactivation only by partially changing the valve rocker, does not need to change the existing cylinder cover, has small change of a valve actuating mechanism, has a simple structure, and is easy to arrange on an engine.
Description
Technical Field
The invention belongs to the field of valve actuating mechanisms of engines, and particularly relates to an engine valve driving rocker arm.
Background
The multi-cylinder engine operates under the low-load working condition, the working load rate of each cylinder of the engine is low, the oil injection quantity is small, the combustion temperature is low, the heat efficiency of the engine is low, and the fuel consumption rate is high. The cylinder deactivation technology is also called as one of technologies for realizing variable working displacement of the engine, and means that when the engine runs at a partial load, fuel supply, ignition and air intake and exhaust of partial cylinders are controlled or cut off through related mechanisms and strategies to stop the engine, so that the load rate of the residual working cylinders is increased, the engine works in a fuel economy area, the fuel consumption rate of the engine can be obviously reduced, and the aim of improving the fuel economy is fulfilled. The cylinder deactivation technology can reduce the number of working cylinders of the multi-cylinder engine, reduce the engine displacement, realize the variable displacement of the engine, improve the working load of the rest cylinders while reducing the actual displacement of the engine, improve the combustion temperature of the working cylinders, improve the engine efficiency and reduce the fuel consumption.
The closest method for realizing cylinder deactivation in the prior art is that an electric control diesel engine realizes that part of cylinders do not spray oil through control logic, and realizes the cylinder deactivation of the engine. For the mode, cylinder deactivation is realized only by not injecting oil, the valve mechanism of the engine still moves, the air inlet and exhaust processes of the cylinder are not changed, pumping loss of the cylinder still exists, and the fuel consumption rate cannot be effectively reduced.
Disclosure of Invention
The invention aims to provide an engine valve driving rocker arm which is simple in structure, small in modification of the existing valve actuating mechanism and used for stopping valve movement when an engine stops oil injection, so that cylinder deactivation is realized.
The purpose of the invention is realized by adopting the following technical scheme:
an engine valve driving rocker comprises a rocker post 1, a lock pin 2 and a rocker body; the middle part of the rocker arm body is matched with the rocker arm shaft 23, swings around the rocker arm shaft 23 and is used for transmitting the motion of a cam on the camshaft to the valve; the part of the rocker arm body matched with the valve is provided with a rocker arm column hole 17, and the axis of the rocker arm column hole 17 is vertical to the axis of the rocker arm shaft 23 and penetrates through the rocker arm body; a lock pin hole 18 crossed with the rocker arm column hole 17 is formed in the middle of the rocker arm column hole 17, one end of the lock pin hole 18 is connected with the rocker arm column hole 17, and the other end of the lock pin hole points to the outside of the rocker arm body; a lock pin hole cover plate 14 is arranged outside the lock pin hole 18 and used for sealing the lock pin hole 18; a rocker arm column 1 is slidably arranged in the rocker arm column hole 17, the rocker arm column 1 is guided in the shell hole, a protruding part 4 at the bottom of the rocker arm column extends out of the rocker arm column hole 17 to be contacted with a valve bridge or a valve, and the top of the rocker arm column is connected with a rocker arm column spring; a rocker arm column hole 17 cover plate is arranged at the top of the rocker arm column hole 17 and used for sealing the rocker arm column hole 17; one end of the rocker column spring is connected with the top of the rocker column 1, and the other end of the rocker column spring is connected with a cover plate of a rocker column hole 17 at the bottom of the rocker column hole 17; the lock pin hole 18 is provided with a lock pin 2 in a sliding way, the lock pin 2 is guided in the lock pin hole 18, one end of the lock pin 2 is contacted with the rocker arm column 1, and the other end is connected with a lock pin spring 6; one end of the lock pin spring 6 is connected with the lock pin 2, and the other end of the lock pin spring is connected with a bottom lock pin hole cover plate 14 of a lock pin hole 18; a notch 9 is arranged in the middle of the rocker arm column 1 in the rocker arm column hole 17 and corresponds to the lock pin hole, an arc-shaped structure is arranged at the position of the lock pin bulge 10 and is matched with the inner side of the rocker arm column notch 9, the lower surface of the notch 9 of the rocker arm column 1 is contacted with the lower surface of the outer side of the lock element lock pin 2 to form a combined surface, and the combined surfaces are complemented to form a locking mechanism, so that the motion of the rocker arm body is allowed to be applied to the engine valve or valves through the lock pin 2 and the rocker arm column 1; the rocker arm body is internally provided with a control oil duct 7, one end of the control oil duct 7 is connected with the control oil duct through a rocker arm shaft 23, and the other end of the control oil duct is connected with the notch 9 of the rocker arm column 1 and the end face of the lock pin 2.
As a more excellent technical scheme of the invention: the bottom of the rocker arm column hole cover plate 13 and the bottom of the lock pin hole cover plate 14 are provided with connecting holes, and the space between the top of the rocker arm column hole 17 and the rocker arm column hole cover plate 13 and the space between the lock pin 2 and the rocker arm column hole cover plate 13 are communicated with the outside.
As a more excellent technical scheme of the invention: the distance h1 between the bottom of the lock pin 2 and the boss of the cover plate of the lock pin 2 is greater than the distance h2 between the outer end surface of the lock pin 2 and the notch 9 of the rocker arm column 1.
As a more excellent technical scheme of the invention: the distance h3 between the top surface of the rocker arm column 1 and the boss of the rocker arm column hole cover plate 13 is larger than the maximum lift of the valve.
As a more excellent technical scheme of the invention: the lower part of the notch 9 of the rocker arm column 1 is provided with an annular groove, and under the locking state, the distance between the bottom of the annular groove at the lower part of the notch 9 of the rocker arm column 1 and the top of the intersection position of the control oil duct 7 and the rocker arm column hole 17 is larger than the maximum lift of the valve.
As a more excellent technical scheme of the invention: the lock pin 2 is of a hollow structure.
The beneficial effects are as follows:
the engine valve driving rocker provided by the invention comprises a rocker column, a lock pin and a rocker body; the rocker arm body is provided with a rocker arm column hole, the middle part of the rocker arm column in the rocker arm column hole is provided with a notch corresponding to the lock pin hole, and the notch and the lock pin form a locking mechanism, so that the motion of the rocker arm is allowed to be applied to the valve through the rocker arm column; after the control oil passage is communicated, the lock pin overcomes the pre-tightening force of the lock pin spring under the action of oil pressure to unlock the locking mechanism; the motion of the rocker arm cannot be applied to the rocker arm column, the rocker arm column slides in the shell hole, and fuel injection of the cylinder is stopped, so that cylinder deactivation is realized; the valve rocker has a simple structure, can realize the stop of the valve motion and the cylinder deactivation only by partially changing the valve rocker, does not need to change the existing cylinder cover, has small change of a valve actuating mechanism, has a simple structure, and is easy to arrange on an engine.
Drawings
FIG. 1 is a schematic view of a valve rocker arm and valve interface portion of the present invention.
Fig. 2 is a schematic overall cross-sectional view of a valve actuating rocker arm of the present invention.
FIG. 3 is a schematic view of the contact between the roller and the highest point of the cam in the unlocked state of the valve actuating rocker arm of the present invention.
FIG. 4 is a schematic view of the rocker roller and cam base circle contact during locking of the present invention.
FIG. 5 is a schematic view of a rocker arm column according to the present invention.
Figure 6 is a schematic view of the latch of the present invention.
In the figure: 1-a rocker arm column; 2-a lock pin; 3-a rocker arm body; 4-a protruding part at the bottom of the rocker arm column; 6-a detent spring; 7-control the oil duct; 8-sealing the steel ball; 9-notch; 10-the locking pin protrudes outwards; 11-the distance h2 from the convex surface of the lock pin to the notch of the rocker arm column; 12-latch bottom to latch cover top distance h 1; 13-rocker arm column hole cover plate; 14-a lockpin hole cover plate; 15-locking pin cavity connection hole; 16-rocker arm column cavity connecting hole; 17-rocker arm column hole; 18-locking pin holes; 19-rocker arm column step-shaped boss; 20-distance h3 from the rocker arm column to the step-shaped boss of the rocker arm column cover plate; 21-a concave ring groove at the lower part of the rocker arm column gap; 22-a roller; 23-Rocker shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to be exhaustive or exhaustive. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-6, the invention provides an engine valve driving rocker arm, which comprises a rocker arm column 1, a lock pin 2 and a rocker arm body; the middle part of the rocker arm body is matched with the rocker arm shaft 23 and swings around the rocker arm shaft 23 to transmit the motion of the cam on the camshaft to the valve; the part of the rocker arm body matched with the valve is provided with a rocker arm column hole 17, and the axis of the rocker arm column hole 17 is vertical to the axis of the rocker arm shaft 23 and penetrates through the rocker arm body; a lock pin hole 18 crossed with the rocker arm column hole 17 is formed in the middle of the rocker arm column hole 17, one end of the lock pin hole 18 is connected with the rocker arm column hole 17, and the other end of the lock pin hole points to the outside of the rocker arm body; a lock pin hole cover plate 14 is arranged outside the lock pin hole 18 and used for sealing the lock pin hole 18; a rocker arm column 1 is slidably arranged in the rocker arm column hole 17, the rocker arm column 1 is guided in the shell hole, a protruding part 4 at the bottom of the rocker arm column extends out of the rocker arm column hole 17 to be contacted with a valve bridge or a valve, and the top of the rocker arm column is connected with a rocker arm column spring; a rocker arm column hole 17 cover plate is arranged at the top of the rocker arm column hole 17 and used for sealing the rocker arm column hole 17; one end of the rocker arm column spring is connected with the top of the rocker arm column 1, and the other end of the rocker arm column spring is connected with a cover plate of a rocker arm column hole 17 at the bottom of the rocker arm column hole 17; the lock pin hole 18 is provided with a lock pin 2 in a sliding way, the lock pin 2 is guided in the lock pin hole 18, one end of the lock pin 2 is contacted with the rocker arm column 1, and the other end is connected with a lock pin spring 6; one end of the lock pin spring 6 is connected with the lock pin 2, and the other end of the lock pin spring is connected with a bottom lock pin hole cover plate 14 of a lock pin hole 18; a notch 9 is arranged in the middle of the rocker arm column 1 in the rocker arm column hole 17 and corresponds to the lock pin hole, an arc-shaped structure is arranged at the position of the lock pin bulge 10 and is matched with the inner side of the rocker arm column notch 9, the lower surface of the notch 9 of the rocker arm column 1 is contacted with the lower surface of the outer side of the lock element lock pin 2 to form a combined surface, and the combined surfaces are complemented to form a locking mechanism, so that the motion of the rocker arm body is allowed to be applied to the engine valve or valves through the lock pin 2 and the rocker arm column 1; the rocker arm body is internally provided with a control oil duct 7, one end of the control oil duct 7 is connected with the control oil duct through a rocker arm shaft 23, and the other end of the control oil duct is connected with the notch 9 of the rocker arm column 1 and the end face of the lock pin 2.
In some embodiments, the bottom of the rocker arm cylinder hole cover plate 13 and the bottom of the lock pin hole cover plate 14 are provided with connecting holes, so that the space between the top of the rocker arm cylinder hole 17 and the rocker arm cylinder hole cover plate 13, the space between the lock pin 2 and the rocker arm cylinder hole cover plate 13 and the outside are communicated, and air lock is prevented.
In some embodiments, the distance h1 from the bottom of the latch pin 2 to the cover plate boss of the latch pin 2 is greater than the distance h2 from the outer end face of the latch pin 2 to the notch 9 of the rocker arm column 1, so that the latch pin 2 can move enough to unlock the rocker arm column 1 and the rocker arm after receiving oil pressure.
In some embodiments, the distance h3 from the top surface of the rocker arm column 1 to the boss of the rocker arm column hole cover plate 13 is larger than the maximum lift of the valve.
In some embodiments, the lower part of the notch 9 of the rocker arm column 1 is provided with an annular groove, and in a locking state, the distance between the bottom of the annular groove at the lower part of the notch 9 of the rocker arm column 1 and the top of the intersection position of the control oil passage 7 and the rocker arm column hole 17 is greater than the maximum lift of the valve.
In some embodiments, the lock pin 2 is a hollow structure, which can reduce the mass and improve the corresponding speed of the mechanism.
When the other end of the rocker arm is about to contact with a base circle of the camshaft, the separation distance between the lower surface of the notch 9 of the rocker arm column 1 and the lower surface of the outer side of the lock pin 2 is a valve clearance, and a clearance is reserved between the upper surface of the notch 9 of the rocker arm column 1 and the upper surface of the outer side of the lock pin 2.
One end of the control oil duct 7 is connected with a control oil path through a rocker shaft 23, when the control oil path is cut off, no oil pressure exists in the notch 9 of the rocker arm column 1 and an oil cavity in the left end of the lock pin 2, and when the valve is normally opened and closed, the lock pin 2 moves to the left end of the lock pin hole 18 under the action of leftward pre-tightening force of the lock pin spring 6. The middle part of the rocker arm column 1 and the corresponding position of the lock pin hole are provided with the gap 9, and the outer end of the lock pin 2 is matched with the locking mechanism, so that under the action of the force of the lock pin spring 6, the outer end of the lock pin 2 is inserted into the gap 9 of the rocker arm column 1; when the other end of the rocker arm is contacted with the base circle of the camshaft, because of the existence of the valve clearance, the lower surface of the notch 9 of the rocker arm column 1 is separated from the lower surface of the outer side of the lock pin 2, the lock pin 2 still extends into the notch 9 of the rocker arm column 1, the separation distance between the lower surface of the notch 9 of the rocker arm column 1 and the lower surface of the outer side of the lock pin 2 is the valve clearance, and a clearance is reserved between the upper surface of the notch 9 of the rocker arm column 1 and the upper surface of the outer side of the lock pin 2.
When the other end of the rocker arm is just contacted with the cam, and the valve lift of the cam profile is in an increasing stage, along with the rotation of the cam shaft, the cam bulge part of the cam shaft extrudes the roller 22 on the rocker arm, and the rocker arm body on the other side of the cam moves downwards together with the lock pin 2; because the protruding part 4 at the bottom of the rocker arm column is contacted with the valve bridge, because the rocker arm column 1 moves upwards relative to the lock pin 2 under the action of the pretightening force of the valve spring due to the existence of a valve clearance, the lower surface of the notch 9 of the rocker arm column 1 and the lower surface of the outer end of the lock pin 2 are contacted in the notch 9 of the rocker arm column 1 to form a combined surface. With further rotation of the cam, the motion of the rocker arm is transferred to the rocker arm post 1 through the interface and to the valve bridge and thus to the engine valve or valves, completing the valve opening.
When the cam profile valve lift is in a reduction stage along with the continuous rotation of the camshaft, the cam cannot extrude the rocker arm through the roller 22, the rocker arm column 1 is in contact with the valve bridge, and under the action of the pretightening force of the valve spring, the lower surface of the notch 9 of the rocker arm column 1 and the lower surface of the outer end of the lock pin 2 are still in contact with each other in the notch 9 of the rocker arm column 1 to form a combined surface. The rocker arm body is jacked up under the action of the valve spring pre-tightening force, the roller 22 is extruded on the cam by taking the cam shaft as a fulcrum, and the valve and the rocker arm body are lifted together to complete the closing of the valve.
When the valve motion needs to be stopped, the control oil duct 7 is communicated with the control oil path, oil pressure is built in the notch 9 of the rocker arm column 1 and the oil cavity in the left end of the lock pin 2, when the other end of the rocker arm is in contact with the base circle of the camshaft, because of the valve clearance, the lower surface of the notch 9 of the rocker arm column 1 is separated from the lower surface of the outer side of the lock pin 2, the upper surface of the notch 9 of the rocker arm column 1 is not in contact with the upper surface of the outer side of the lock pin 2, the lock pin 2 overcomes the pre-tightening force of the lock pin spring 6 to move towards the cover plate direction under the action of the oil pressure in the notch 9 of the rocker arm column 1, the lock pin 2 does not extend into the notch 9 of the rocker arm column 1 any more, and the locking mechanism is unlocked. The distance h1 between the bottom of the lock pin 2 and the cover plate boss of the lock pin 2 is greater than the distance h2 between the outer end surface of the lock pin 2 and the notch 9 of the rocker arm column 1, the outer side of the lock pin 2 is not contacted with the upper surface and the lower surface of the notch 9 of the rocker arm column 1 any more, and the lock pin 2 can move enough to realize the unlocking of the rocker arm column 1 and the rocker arm after being acted by oil pressure;
when the other end of the rocker arm is in contact with the cam along with the continuous rotation of the camshaft, the lift of the cam molded line valve is in an increasing stage, the rocker arm and the lock pin 2 cannot transmit downward motion to the rocker arm column 1, the rocker arm column 1 slides upwards in the shell hole relative to the rocker arm lock pin 2 and compresses the rocker arm column spring, and as the spring force of the compressed rocker arm column spring is smaller than the pretightening force of the valve spring, the rocker arm motion cannot be applied to one or more engine valves through the rocker arm column 1, and the valves cannot be opened. When the cam profile valve lift is in a reduction stage along with the continuous rotation of the cam shaft, the cam cannot extrude the rocker arm through the roller 22, the rocker arm body is jacked up under the action of the compression spring force of the rocker arm column spring, the roller 22 is extruded on the cam by taking the cam shaft as a fulcrum, the valve bridge and the valve are kept in a static state, and the valve is still in a closed state. The valve is always in a closed state along with the rotation of the cam, and the fuel injection of the cylinder is stopped at the same time, so that the cylinder deactivation is realized; the valve rocker has simple structure, can realize cylinder deactivation only by partially changing the valve rocker, does not need to change the existing cylinder cover, has small change of a valve actuating mechanism, has simple structure and is easy to arrange on an engine.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. An engine valve actuating rocker arm, characterized by: comprises a rocker arm column, a lock pin and a rocker arm body; the middle part of the rocker arm body is matched with the rocker arm shaft and swings around the rocker arm shaft, and the rocker arm body is used for transmitting the motion of a cam on the cam shaft to the valve; the part of the rocker arm body, which is matched with the valve, is provided with a rocker arm column hole, and the axis of the rocker arm column hole is vertical to the axis of the rocker arm shaft and penetrates through the rocker arm body; a lock pin hole crossed with the rocker arm column hole is arranged in the middle of the rocker arm column hole, one end of the lock pin hole is connected with the rocker arm column hole, and the other end of the lock pin hole points to the outside of the rocker arm body; a lock pin hole cover plate is arranged outside the lock pin hole and used for sealing the lock pin hole; a rocker arm column is slidably arranged in the rocker arm column hole, the rocker arm column is guided in the shell hole, a protruding part at the bottom of the rocker arm column extends out of the rocker arm column hole to be contacted with a valve bridge or a valve, and the top of the rocker arm column is connected with a rocker arm column spring; a rocker arm column hole cover plate is arranged at the top of the rocker arm column hole and used for sealing the rocker arm column hole; one end of the rocker column spring is connected with the top of the rocker column, and the other end of the rocker column spring is connected with a rocker column hole cover plate at the bottom of the rocker column hole; the locking pin hole is provided with a locking pin in a sliding manner, the locking pin is guided in the locking pin hole, one end of the locking pin is contacted with the rocker arm column, and the other end of the locking pin is connected with a locking pin spring; one end of the lock pin spring is connected with the lock pin, and the other end of the lock pin spring is connected with a lock pin hole cover plate at the bottom of the lock pin hole; the middle part of the rocker arm column in the rocker arm column hole and the corresponding position of the lock pin hole are provided with notches, the convex part of the lock pin is provided with an arc-shaped structure which is matched with the inner side of the notch of the rocker arm column, the lower surface of the notch of the rocker arm column is contacted with the lower surface of the outer side of the lock pin to form a combined surface, and the combined surfaces are complemented to form a locking mechanism, so that the motion of the rocker arm body is allowed to be applied to one or more engine valves through the lock pin and the rocker arm column; and a control oil duct is arranged in the rocker arm body, one end of the control oil duct is connected with the control oil duct through a rocker arm shaft, and the other end of the control oil duct is connected with the notch of the rocker arm column and the end face of the lock pin.
2. An engine valve actuating rocker arm as set forth in claim 1, wherein: and connecting holes are formed in the bottom of the rocker arm column hole cover plate and the bottom of the lock pin hole cover plate, and the space between the top of the rocker arm column hole and the rocker arm column hole cover plate and the space between the lock pin and the rocker arm column hole cover plate are communicated with the outside.
3. An engine valve actuating rocker arm as set forth in claim 1, wherein: the distance from the bottom of the lock pin to the boss of the lock pin cover plate is greater than the distance from the outer end face of the lock pin to the notch of the rocker arm column.
4. An engine valve actuating rocker arm as set forth in claim 1, wherein: the distance from the top surface of the rocker arm column to the cover plate boss of the rocker arm column hole is larger than the maximum lift of the valve.
5. An engine valve actuating rocker arm as set forth in claim 1, wherein: the lower part of the rocker arm column gap is provided with an annular groove, and under the locking state, the distance between the bottom of the annular groove at the lower part of the rocker arm column gap and the top of the cross position of the control oil duct and the rocker arm column hole is larger than the maximum lift of the valve.
6. An engine valve actuating rocker arm as set forth in claim 1, wherein: the lock pin is of a hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393665.9A CN112228178B (en) | 2020-05-11 | 2020-05-11 | Engine valve driving rocker arm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393665.9A CN112228178B (en) | 2020-05-11 | 2020-05-11 | Engine valve driving rocker arm |
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| CN112228178A CN112228178A (en) | 2021-01-15 |
| CN112228178B true CN112228178B (en) | 2022-06-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113153478B (en) * | 2021-04-20 | 2022-11-15 | 一汽解放汽车有限公司 | Engine valve driving mechanism and vehicle |
| CN113898439A (en) * | 2021-08-30 | 2022-01-07 | 东风商用车有限公司 | Valve bridge capable of changing valve motion |
| CN113719331A (en) * | 2021-09-24 | 2021-11-30 | 一汽解放汽车有限公司 | Engine valve driving device |
| CN114439567B (en) * | 2022-01-27 | 2023-04-18 | 浙江宇太精工股份有限公司 | Engine valve rocker arm assembly with cylinder deactivation function |
| CN115324681B (en) * | 2022-09-02 | 2024-01-09 | 一汽解放汽车有限公司 | Valve driving rocker arm |
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| CN2045783U (en) * | 1988-05-16 | 1989-10-11 | 郭景坤 | Cylinder-changing device for engine |
| CN102400731B (en) * | 2010-09-15 | 2014-01-15 | 上海汽车集团股份有限公司 | Cylinder-deactivation tappet device of engine |
| US9574463B2 (en) * | 2015-04-21 | 2017-02-21 | Schaeffler Technologies AG & Co. KG | Switchable finger follower with lost motion spring lost stroke minimizer |
| US10472998B2 (en) * | 2018-02-16 | 2019-11-12 | Delphi Technologies Ip Limited | Switchable rocker arm with lash adjustment |
| JP7020235B2 (en) * | 2018-03-27 | 2022-02-16 | トヨタ自動車株式会社 | Internal combustion engine decompression device |
| CN208310862U (en) * | 2018-05-15 | 2019-01-01 | 上汽通用汽车有限公司 | Rocker arrangement and engine valve actuating mechanism |
| US10519817B1 (en) * | 2018-08-29 | 2019-12-31 | Delphi Technologies Ip Limited | Switchable rocker arm with lash adjustment and travel stop |
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2020
- 2020-05-11 CN CN202010393665.9A patent/CN112228178B/en active Active
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