CN216811822U - Variable valve lift mechanism - Google Patents
Variable valve lift mechanism Download PDFInfo
- Publication number
- CN216811822U CN216811822U CN202123334562.4U CN202123334562U CN216811822U CN 216811822 U CN216811822 U CN 216811822U CN 202123334562 U CN202123334562 U CN 202123334562U CN 216811822 U CN216811822 U CN 216811822U
- Authority
- CN
- China
- Prior art keywords
- rocker arm
- main
- auxiliary
- valve lift
- piston
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
The utility model relates to the field of engines and discloses a variable valve lift mechanism. When the engine is in high speed and high load, the actuating pin extends out of the main rocker arm and abuts against one side of the auxiliary rocker arm, which is opposite to the camshaft, so that the main rocker arm and the auxiliary rocker arm are locked, and the auxiliary cam is used for determining the height of the valve lift. The two actuating pins are driven by the piston to synchronously extend and retract, so that one end of each actuating pin selectively extends out of the main rocker arm and abuts against the outer surface of the corresponding auxiliary rocker arm back to the camshaft or retracts into the main rocker arm, the structure of the variable valve lift mechanism is simplified, and the cost is reduced. The two auxiliary cams, the actuating pins and the auxiliary rocker arms which correspond to the auxiliary cams one to one are arranged, so that when the auxiliary cams determine the valve lift, the two auxiliary rocker arms on two sides of the main rocker arm synchronously swing, and the stability of the main rocker arm in swinging is ensured.
Description
Technical Field
The utility model relates to the field of engines, in particular to a variable valve lift mechanism.
Background
The variable valve lift mechanism is provided with two cams with different lifts and wrap angles, which are respectively marked as a low-rotating-speed cam and a high-rotating-speed cam, the lifts of the low-rotating-speed cam and the high-rotating-speed cam are different, the valves are driven by switching the cams with different lifts, the change of the size and the phase of the valve lift is realized, the air intake and exhaust amount is controlled, the requirements on the oxygen amount under different working conditions are met, the engine obtains the best high-speed efficiency and the best low-speed torque, and the best economy is further obtained.
In order to realize switching between cams with different lifts, a driving structure is arranged, but the conventional driving structure has the defects of complex structure and high cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a variable valve lift mechanism with simple structure and high reliability, and reduce the requirement on structural precision and the processing cost.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a variable valve lift mechanism comprising:
the rocker shaft is sleeved with a main rocker arm and an auxiliary rocker arm which can rotate relative to the rocker shaft respectively;
a valve connected to one side of the main rocker arm;
the cam shaft is arranged on the other side of the main rocker arm, a main cam and an auxiliary cam are fixed on the cam shaft, and the lift range of the main cam is smaller than that of the auxiliary cam; the main cam and the auxiliary cam drive the main rocker arm and the auxiliary rocker arm to swing through a roller respectively;
the two auxiliary cams are respectively arranged at the two axial ends of the main cam and are in one-to-one correspondence with the auxiliary rocker arms;
the variable valve lift mechanism further comprises actuating pins which are connected to the main rocker arms in a sliding mode and correspond to the auxiliary rocker arms one to one, and one ends of the actuating pins can selectively extend out of the main rocker arms and abut against the outer surfaces, back to the camshaft, of the corresponding auxiliary rocker arms or retract into the main rocker arms;
and the piston is connected with the main rocker arm in a sliding manner, is arranged on two radial sides of the piston and is used for driving the two execution pins to synchronously extend and retract.
As a preferable mode of the variable valve lift mechanism, the extending and contracting direction of the actuating pin is an axial direction of the main rocker arm, the piston is slidably connected to the main rocker arm, and the sliding direction of the piston is perpendicular to the axial direction of the main rocker arm.
As a preferred technical solution of the above variable valve lift mechanism, an internal oil passage is provided in the main rocker arm, and the piston is slidably disposed in the internal oil passage;
the main rocker arm is provided with a mounting hole communicated with the internal oil duct, and the execution pin is arranged in the mounting hole in a sliding manner;
the high-pressure oil in the internal oil passage can drive the piston to slide, so that the piston pushes the execution pin to extend out of the opening of the mounting hole;
and a first return spring is arranged in the mounting hole and used for driving the execution pin to retract to the mounting hole.
As a preferred technical solution of the above variable valve lift mechanism, the rocker shaft is provided with a high-pressure oil passage, and the variable valve lift mechanism further includes an electromagnetic valve capable of selectively communicating the internal oil passage at one end of the piston with the high-pressure oil passage or with the external atmosphere;
and a second return spring is arranged in the internal oil duct at the other end of the piston and can be compressed when the high-pressure oil in the internal oil duct drives the piston to slide.
As a preferable technical solution of the above variable valve lift mechanism, the piston includes a first cylindrical section and a conical section which are coaxially arranged, and an outer diameter of the conical section is gradually reduced from the first cylindrical section to the conical section;
one end of the actuating pin can selectively abut against the outer wall of the first cylindrical section or the outer wall of the conical section.
As a preferable mode of the variable valve lift mechanism, the actuating pin includes a first cylindrical portion and a second cylindrical portion that are coaxially disposed, and an outer diameter of the first cylindrical portion is smaller than an outer diameter of the second cylindrical portion and a step surface is formed;
the opening end of the mounting hole is provided with a limiting blocking piece, the first return spring is sleeved outside the first cylindrical portion, and two ends of the first return spring are respectively abutted against the step surface and the limiting blocking piece.
As a preferable aspect of the variable valve lift mechanism, the variable valve lift mechanism further includes:
the first limiting part is connected to the main rocker arm, one end of the actuating pin extends out of the main rocker arm and abuts against the outer surface of the cam shaft, and the piston abuts against the first limiting part when the corresponding auxiliary rocker arm faces away from the outer surface of the cam shaft.
As a preferable aspect of the variable valve lift mechanism, the variable valve lift mechanism further includes:
the second locating part is arranged on one side, back to the camshaft, of the main rocker arm, and when the execution pin retracts into the installation hole, the auxiliary rocker arm can abut against the second locating part.
As a preferable technical solution of the above variable valve lift mechanism, two second limiting members are provided, and the two second limiting members are integrally formed;
the first limiting parts are screws, the two second limiting parts are connected to the main rocker arm through the screws, and one end of each second limiting part extends into the internal oil duct to limit the piston.
As a preferable aspect of the variable valve lift mechanism, the second stopper is a spring plate that is elastically deformable.
The utility model has the beneficial effects that: the utility model provides a variable valve lift mechanism, when an engine rotates at a low speed and loads, an actuating pin retracts into a main rocker arm, the main rocker arm and an auxiliary rocker arm move independently, and a main cam is used for determining the height of a valve lift. When the engine is in high speed and high load, the actuating pin extends out of the main rocker arm and abuts against one side of the auxiliary rocker arm, which is opposite to the camshaft, so that the main rocker arm and the auxiliary rocker arm are locked, and the auxiliary cam is used for determining the height of the valve lift.
The two actuating pins are driven by the piston to synchronously extend and retract, so that one end of each actuating pin selectively extends out of the main rocker arm and abuts against the outer surface of the corresponding auxiliary rocker arm back to the camshaft or retracts into the main rocker arm, the structure of the variable valve lift mechanism is simplified, and the cost is reduced. The two auxiliary cams, the actuating pins and the auxiliary rocker arms which correspond to the auxiliary cams one to one are arranged, so that when the auxiliary cams determine the valve lift, the two auxiliary rocker arms on two sides of the main rocker arm synchronously swing, and the stability of the main rocker arm in swinging is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a variable valve lift mechanism when a secondary cam determines a valve lift, according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a first cross sectional view of the variable valve lift mechanism with the auxiliary cam determining the valve lift according to the embodiment of the present invention;
FIG. 4 is a second cross-sectional view of the variable valve lift mechanism with the auxiliary cam determining the valve lift provided by the embodiment of the present invention;
FIG. 5 is a schematic view of a portion of the structure of FIG. 4;
FIG. 6 is a partial structural schematic diagram of a variable valve lift mechanism when a main cam determines a valve lift according to an embodiment of the present invention;
FIG. 7 is a partial cross-sectional view of FIG. 6;
fig. 8 is a comparison diagram of the valve lift when the main cam determines the valve lift and the valve lift when the auxiliary cam determines the valve lift, according to the embodiment of the utility model.
In the figure:
1. a rocker shaft; 11. a main rocker arm; 111. an internal oil passage; 12. an auxiliary rocker arm;
21. an execution pin; 22. a first return spring; 23. a piston; 24. a second return spring;
3. a first limit piece; 4. a second limiting member;
5. a camshaft; 51. a main cam; 52. a sub-cam;
6. an air valve; 7. a roller.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
As shown in fig. 1 to 7, the present embodiment provides a variable valve lift mechanism including a rocker shaft 1, a valve 6, and a camshaft 5, wherein the rocker shaft 1 is sleeved with a primary rocker arm 11 and a secondary rocker arm 12 that are rotatable with respect to the rocker shaft 1, respectively; the valve 6 is connected with one side of the main rocker arm 11, the camshaft 5 is arranged on the other side of the main rocker arm 11, a main cam 51 and an auxiliary cam 52 are fixed on the camshaft 5, and the lift of the main cam 51 is smaller than that of the auxiliary cam 52; the main cam 51 and the auxiliary cam 52 drive the main rocker arm 11 and the auxiliary rocker arm 12 to oscillate via one roller 7, respectively. In the present embodiment, the wrap angle of the main cam 51 is smaller than that of the sub cam 52.
In this embodiment, two auxiliary cams 52 are provided, which are provided at both ends of the main cam 51 in the axial direction, respectively, and the auxiliary cams 52 are provided in one-to-one correspondence with the auxiliary rocker arms 12.
The variable valve lift mechanism further comprises an actuating pin 21 and a piston 23, wherein the actuating pin 21 is connected to the main rocker arm 11 in a sliding mode and corresponds to the auxiliary rocker arms 12 one by one; one end of the actuating pin 21 can selectively extend out of the main rocker arm 11 and abut against the outer surface of the auxiliary rocker arm 12 opposite to the camshaft 5, or retract into the main rocker arm 11; the pistons 23 are slidably connected to the main rocker arm 11 and disposed on both radial sides of the pistons 23, and the pistons 23 are used for driving the two actuating pins 21 to synchronously extend and retract.
Specifically, when the actuating pin 21 is in the first position, the actuating pin 21 extends out of the primary rocker arm 11 and abuts against the outer surface of the secondary rocker arm 12 facing away from the camshaft 5; when the actuation pin 21 is in the second position, the actuation pin 21 retracts into the primary rocker arm 11. In this embodiment, the extending and retracting direction of the actuating pins 21 is the axial direction of the main rocker arm 11, the piston 23 is slidably connected to the main rocker arm 11, the sliding direction of the piston 23 is perpendicular to the axial direction of the main rocker arm 11, and when the piston 23 slides, the two actuating pins 21 can be driven to extend and retract synchronously.
When the engine is in low speed and low load, the actuating pin 21 is in the second position, the actuating pin 21 retracts into the main rocker arm 11, the main rocker arm 11 and the auxiliary rocker arm 12 move independently, and the main cam 51 determines the height of the lift of the valve 6. When the engine is in a high speed and high load state, the actuating pin 21 is in the first position, the actuating pin 21 extends out of the main rocker arm 11 and abuts against one side of the auxiliary rocker arm 12 opposite to the camshaft 5 to lock the main rocker arm 11 and the auxiliary rocker arm 12, and the auxiliary cam 52 is used for determining the height of the lift of the valve 6. The variable valve lift mechanism has the advantages of simple structure and low cost.
By providing the two auxiliary cams 52, the actuating pins 21 and the auxiliary rocker arms 12 corresponding to the auxiliary cams 52 one by one, when the auxiliary cams 52 determine the lift of the valve 6, the two auxiliary rocker arms 12 on both sides of the main rocker arm 11 can be swung synchronously, and the stability of the main rocker arm 11 when swinging can be ensured.
Fig. 8 is a comparison diagram of the valve lift when the main cam determines the valve lift and the valve lift when the auxiliary cam determines the valve lift, and referring to fig. 8, it can be seen that the variable valve lift mechanism provided by the embodiment can realize switching between two different valve lifts.
Further, the main rocker arm 11 has an internal oil passage 111 therein, the piston 23 is slidably disposed in the internal oil passage 111, the main rocker arm 11 is provided with a mounting hole communicating with the internal oil passage 111, and the actuating pin 21 is slidably disposed in the mounting hole. In this embodiment, the axial direction of the mounting hole is perpendicular to the axial direction of the inner oil passage 111, and there are two mounting holes, and the two mounting holes are located on the two radial sides of the inner oil passage 111 and are coaxially disposed.
The high-pressure oil in the internal oil passage 111 can drive the piston 23 to slide, so that the piston 23 pushes the actuating pin 21 to extend out of the opening of the mounting hole; a first return spring 22 is provided in the mounting hole for driving the actuator pin 21 to retract into the mounting hole. With the above arrangement, the expansion and contraction of the actuating pin 21 is achieved.
In the present embodiment, the piston 23 slides reciprocally along the axial direction thereof between the lock position and the unlock position, and when the piston 23 is in the lock position, the actuating pin 21 is in the first position; with the piston 23 in the unlocked position, the actuator pin 21 can be retracted into the primary rocker arm 11.
The rocker shaft 1 is provided with a high-pressure oil duct, and the variable valve lift mechanism further comprises an electromagnetic valve which can selectively enable the internal oil duct 111 at one end of the piston 23 to be communicated with the high-pressure oil duct or external atmosphere; a second return spring 24 is provided in the internal oil passage 111 at the other end of the piston 23 and can be compressed when the high-pressure oil in the internal oil passage 111 drives the piston 23 to slide. In the present embodiment, the electromagnetic valve is a two-position three-way electromagnetic valve, when the electromagnetic valve communicates the internal oil passage 111 with the high-pressure oil passage, the piston 23 is in the locking position, and the first return spring 22 and the second return spring 24 are both in the compressed state; when the solenoid valve communicates the internal oil passage 111 with the outside atmosphere, the piston 23 is in the unlock position.
When the electromagnetic valve connects the internal oil passage 111 and the high-pressure oil passage, the high-pressure oil enters the internal oil passage 111, the high-pressure oil in the internal oil passage 111 applies a force to the piston 23, the piston 23 slides in the internal oil passage 111, the second return spring 24 is compressed, the piston 23 pushes the actuating pin 21 to extend out from the opening of the mounting hole, the first return spring 22 is compressed, the actuating pin 21 abuts against the side of the auxiliary rocker arm 12, which is opposite to the gear shaft, so that the main rocker arm 11 is connected with the auxiliary rocker arm 12 through the actuating pin 21, and the auxiliary cam 52 determines the lift of the valve 6.
When the electromagnetic valve enables the internal oil passage 111 to be communicated with the outside atmosphere, the internal oil passage 111 is decompressed, and the second return spring 24 drives the piston 23 to move and return; the first return spring 22 will urge the actuator pin 21 to retract into the mounting hole.
Further, the piston 23 includes a first cylindrical section and a conical section which are coaxially arranged, and an outer diameter of the conical section is gradually reduced from the first cylindrical section to the conical section, and one end of the actuating pin 21 can selectively abut against an outer wall of the first cylindrical section or an outer wall of the conical section. Specifically, when the actuating pin 21 is in the first position, the actuating pin 21 abuts against the outer wall of the first cylindrical section; when the actuating pin 21 is in the second position, the actuating pin 21 abuts against the outer wall of the conical section.
Further, the actuating pin 21 includes a first cylindrical portion and a second cylindrical portion which are coaxially disposed, an outer diameter of the first cylindrical portion is smaller than an outer diameter of the second cylindrical portion and a stepped surface is formed; a limiting stop piece is arranged at the opening end of the mounting hole, the first return spring 22 is sleeved outside the first cylindrical part, and two ends of the first return spring 22 are respectively abutted against the step surface and the limiting stop piece; the compression of the first return spring 22 is guided by the first cylindrical portion.
Further, the side of the auxiliary rocker arm 12 facing away from the camshaft 5 is provided with a groove into which the actuating pin 21 can be selectively inserted or withdrawn in the axial direction thereof. Specifically, when the actuating pin 21 is in the first position, the actuating pin 21 extends out of the main rocker arm 11 and into the groove and abuts against the inner bottom wall of the groove; when the actuation pin 21 is in the second position, the actuation pin 21 exits the recess and retracts into the primary rocker arm 11. Optionally, two grooves are formed in each auxiliary rocker arm 12 and are respectively arranged at two axial ends of the auxiliary rocker arm 12, so that the two auxiliary rocker arms 12 are prevented from being reversely mounted.
Further, the variable valve lift mechanism further includes a first limiting member 3, the first limiting member 3 is connected to the main rocker arm 11, one end of the actuating pin 21 extends out of the main rocker arm 11 and abuts against an outer surface of the corresponding auxiliary rocker arm 12 facing away from the camshaft 5, and the piston 23 abuts against the first limiting member 3 under the action of the second return spring 24. The piston 23 is limited by providing the first limiting member 3.
Further, the variable valve lift mechanism further comprises a second limiting part 4, the second limiting part 4 is arranged on one side, back to the camshaft 5, of the main rocker arm 11, when the actuating pin 21 retracts into the mounting hole, the auxiliary rocker arm 12 can abut against the second limiting part 4, the auxiliary rocker arm 12 is limited through the second limiting part 4, the auxiliary rocker arm 12 is prevented from shaking, and stability of the auxiliary rocker arm 12 is improved.
Furthermore, in order to simplify the structure, two second limiting members 4 are provided, and the two second limiting members 4 are integrally formed; the first limiting members 3 are screws, and the two second limiting members 4 are connected to the main rocker arm 11 by the screws, and one end of each of the screws extends into the internal oil passage 111 to limit the piston 23.
Further, in order to avoid the occurrence of vibration when the auxiliary rocker arm 12 abuts against the second stopper 4 when the main cam 51 is operated, in the present embodiment, the second stopper 4 is a spring plate that can be elastically deformed, and the auxiliary rocker arm 12 is cushioned by the spring plate to reduce the vibration.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. A variable valve lift mechanism comprising:
the rocker arm mechanism comprises a rocker arm shaft (1), wherein a main rocker arm (11) and an auxiliary rocker arm (12) which can respectively rotate relative to the rocker arm shaft (1) are sleeved on the rocker arm shaft (1);
a valve (6), the valve (6) being connected to one side of the main rocker arm (11);
the camshaft (5) is arranged on the other side of the main rocker arm (11), a main cam (51) and an auxiliary cam (52) are fixed on the camshaft (5), and the lift of the main cam (51) is smaller than that of the auxiliary cam (52); the main cam (51) and the auxiliary cam (52) drive the main rocker arm (11) and the auxiliary rocker arm (12) to swing through a roller (7) respectively;
the two auxiliary cams (52) are respectively arranged at two axial ends of the main cam (51), and the auxiliary cams (52) and the auxiliary rocker arms (12) are arranged in a one-to-one correspondence manner;
the variable valve lift mechanism further comprises an actuating pin (21) which is connected to the main rocker arm (11) in a sliding mode and corresponds to the auxiliary rocker arms (12) in a one-to-one mode, one end of the actuating pin (21) can selectively extend out of the main rocker arm (11) and abut against the outer surface, opposite to the camshaft (5), of the corresponding auxiliary rocker arm (12) or retract into the main rocker arm (11);
and the piston (23) is connected to the main rocker arm (11) in a sliding manner, arranged on two radial sides of the piston (23) and used for driving the two actuating pins (21) to synchronously extend and retract.
2. Variable valve lift mechanism according to claim 1, characterized in that the extension and retraction direction of the actuation pin (21) is in the axial direction of the main rocker arm (11), the piston (23) being slidingly connected to the main rocker arm (11), the sliding direction of the piston (23) being perpendicular to the axial direction of the main rocker arm (11).
3. The variable valve lift mechanism according to claim 2, characterized in that an internal oil passage (111) is provided in the main rocker arm (11), and the piston (23) is slidably provided in the internal oil passage (111);
the main rocker arm (11) is provided with a mounting hole communicated with the internal oil duct (111), and the execution pin (21) is slidably arranged in the mounting hole;
the high-pressure oil in the inner oil passage (111) can drive the piston (23) to slide, so that the piston (23) pushes the execution pin (21) to extend out of the opening of the installation hole;
and a first return spring (22) is arranged in the mounting hole and used for driving the actuating pin (21) to retract into the mounting hole.
4. The variable valve lift mechanism according to claim 3, characterized in that a high-pressure oil passage is provided on the rocker shaft (1), and the variable valve lift mechanism further comprises an electromagnetic valve capable of selectively communicating the internal oil passage (111) at one end of the piston (23) with the high-pressure oil passage or with the outside atmosphere;
and a second return spring (24) is arranged in the internal oil channel (111) at the other end of the piston (23) and can be compressed when the piston (23) is driven to slide by high-pressure oil in the internal oil channel (111).
5. Variable valve lift mechanism according to claim 4, characterized in that the piston (23) comprises a first cylindrical section and a conical section arranged coaxially, the outer diameter of the conical section decreasing in the direction from the first cylindrical section to the conical section;
one end of the actuating pin (21) can selectively abut against the outer wall of the first cylindrical section or the outer wall of the conical section.
6. The variable valve lift mechanism according to claim 4, characterized in that the actuating pin (21) includes a first cylindrical portion and a second cylindrical portion that are coaxially disposed, the first cylindrical portion having an outer diameter smaller than that of the second cylindrical portion and being formed with a stepped surface;
the opening end of the mounting hole is provided with a limiting blocking piece, the first return spring (22) is sleeved outside the first cylindrical portion, and two ends of the first return spring (22) are respectively abutted against the step surface and the limiting blocking piece.
7. The variable valve lift mechanism according to claim 3, further comprising:
the first limiting part (3), the first limiting part (3) connect in main rocking arm (11), when the one end of execution pin (21) stretches out main rocking arm (11) and butt in vice rocking arm (12) that corresponds is back to the surface of camshaft (5), piston (23) with first limiting part (3) butt.
8. The variable valve lift mechanism according to claim 7, further comprising:
the second limiting part (4), the second limiting part (4) is located one side that main rocking arm (11) back to camshaft (5), when actuating pin (21) retract in the mounting hole, vice rocking arm (12) can the butt in second limiting part (4).
9. The variable valve lift mechanism according to claim 8, characterized in that the second limiting members (4) are provided in two, and the two second limiting members (4) are integrally formed;
the first limiting parts (3) are screws, the two second limiting parts (4) are connected to the main rocker arm (11) through the screws, and one end of each screw extends into the internal oil duct (111) to limit the piston (23).
10. The variable valve lift mechanism according to claim 8, characterized in that the second stopper (4) is an elastically deformable spring plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123334562.4U CN216811822U (en) | 2021-12-28 | 2021-12-28 | Variable valve lift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123334562.4U CN216811822U (en) | 2021-12-28 | 2021-12-28 | Variable valve lift mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216811822U true CN216811822U (en) | 2022-06-24 |
Family
ID=82056446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123334562.4U Active CN216811822U (en) | 2021-12-28 | 2021-12-28 | Variable valve lift mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216811822U (en) |
-
2021
- 2021-12-28 CN CN202123334562.4U patent/CN216811822U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9790824B2 (en) | Lost motion valve actuation systems with locking elements including wedge locking elements | |
| US7909007B2 (en) | Roller finger follower for valve deactivation | |
| CA2450280C (en) | Compression ratio changing device of internal combustion engine | |
| JP2612788B2 (en) | Valve train for internal combustion engine | |
| CN104395564A (en) | A rocker arm | |
| JPH03130509A (en) | Valve actuating device of engine | |
| US11208921B2 (en) | Finger follower for lobe switching and single source lost motion | |
| CN216811822U (en) | Variable valve lift mechanism | |
| US20090056659A1 (en) | Direct-acting type valve lifter for internal-combustion engines | |
| CN111173585A (en) | Fully variable electro-hydraulic valve system | |
| US20230235685A1 (en) | Rocker arms | |
| US10450903B2 (en) | Variable valve lift actuator of engine | |
| US9920659B2 (en) | Coupling pin anti-rotation for a switchable roller finger follower | |
| US20180023425A1 (en) | Coupling pin anti-rotation for a switchable roller finger follower | |
| KR20210153721A (en) | Finger follower for lobe transition and single source lost motion | |
| CN102278162A (en) | Variable valve lift mechanism | |
| WO2022048072A1 (en) | High-efficiency multi-stage brake mechanism | |
| CN114961917B (en) | Rocker arm type valve control mechanism for dynamic cylinder closing of engine and engine | |
| JP3287610B2 (en) | Variable valve timing / lift mechanism | |
| EP3173594A1 (en) | Variable valve lift actuator of engine | |
| CN212296531U (en) | High-efficient multistage arrestment mechanism | |
| CN218439492U (en) | Cam follower capable of adjusting valve timing, rocker arm mechanism and engine | |
| CN115217568B (en) | Engine valve mechanism and method | |
| JP3966742B2 (en) | Variable compression ratio device for internal combustion engine | |
| CN215719001U (en) | Switching mechanism of VVL mechanism, VVL mechanism and engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |