CN114087049A - Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle - Google Patents

Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle Download PDF

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Publication number
CN114087049A
CN114087049A CN202010858662.8A CN202010858662A CN114087049A CN 114087049 A CN114087049 A CN 114087049A CN 202010858662 A CN202010858662 A CN 202010858662A CN 114087049 A CN114087049 A CN 114087049A
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CN
China
Prior art keywords
shaft
control shaft
valve lift
lift control
drive
Prior art date
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Pending
Application number
CN202010858662.8A
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Chinese (zh)
Inventor
谭佳鑫
钟敏琦
于会宾
石珍荣
陆国祥
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BYD Co Ltd
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BYD Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202010858662.8A priority Critical patent/CN114087049A/en
Publication of CN114087049A publication Critical patent/CN114087049A/en
Pending legal-status Critical Current

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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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L2013/0078—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by axially displacing the camshaft

Abstract

The invention relates to the technical field of valve lift control, and discloses a valve lift control shaft, a valve rocker, a driving shaft, a phase modulator control shaft, a shaft assembly, an engine and a vehicle. The valve lift control shaft includes a shaft body on which a drive cam is provided, at least a portion of an annular outer peripheral surface of the drive cam in an axial direction being formed as a wheel inclined surface for driving a valve. The matching position between the valve rocker and the wheel inclined plane is changed through the axial movement of the valve lift control shaft and the wheel inclined plane, so that the valve lift is controlled, the occupied space can be effectively saved by the valve lift control shaft, and the stepless adjustment of the valve lift can be realized due to the continuity of the wheel inclined plane.

Description

Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle
Technical Field
The invention relates to the technical field of valve lift control, in particular to a valve lift control shaft, a valve rocker, a driving shaft, a phase modulator control shaft, a shaft assembly, an engine and a vehicle.
Background
The valve lift of a conventional gasoline engine, once determined, will not vary with rotational speed. Therefore, the performance of all working conditions of the engine is considered when the valve lift is designed, so that the engine cannot obtain good response in a high-speed region and a low-speed region, and the engine cannot obtain optimal high-speed power and optimal low-speed torque.
Therefore, a variable valve lift technology is provided, and the air inflow of the engine can be better adjusted according to the working conditions by adjusting the valve lift under different working conditions, so that the engine can obtain better high-speed and low-speed area response. The variable valve lift technology generally comprises a camshaft, a rocker arm shaft and a valve set, wherein a high-speed cam and a low-speed cam are arranged on the camshaft, the radial size of the peripheral outline of the high-speed cam and the radial size of the peripheral outline of the low-speed cam are changed in the circumferential direction of the cams, and the rocker arm shaft is provided with a high-speed valve rocker arm and a low-speed valve rocker arm which are respectively matched with the high-speed cam and the low-speed cam.
However, the structure has certain defects that the overall required space of the camshaft and the variable valve lift is overlarge, the overall dimension of the engine is increased in the overall design process, the cost for opening the cylinder cover of the engine cylinder body is increased, and the assembly of the engine on the whole vehicle is influenced.
Disclosure of Invention
In a first aspect, an object of the present invention is to provide a valve lift control shaft that can effectively save an occupied space and can achieve stepless adjustment of a valve lift.
In order to achieve the above object, the present invention provides a valve lift control shaft including a shaft body on which a drive cam is provided, at least a portion of an annular outer peripheral surface of the drive cam in an axial direction being formed as a wheel inclined surface for driving a valve.
In the technical scheme, at least one part of the annular peripheral surface of the driving cam in the axial direction is formed into a wheel inclined surface for driving the valve, so when the shaft body is at the initial position, the wheel inclined surface is contacted with a valve rocker arm of the valve, the valve moves in the initial lift when the valve lift control shaft rotates, after the valve lift control shaft moves in the axial direction for a required distance, the wheel inclined surface moves in the axial direction relative to the valve rocker arm, the matching position between the valve rocker arm and the wheel inclined surface is changed, the valve lift control shaft rotates to enable the valve to move in the changed lift, namely, the matching position between the valve rocker arm and the wheel inclined surface is changed through the axial movement of the valve lift control shaft and the wheel inclined surface, and the valve lift is controlled, so the valve lift control shaft can effectively save occupied space, due to the continuity of the inclined surface of the wheel, stepless adjustment of the valve lift can be realized.
Further, an annular outer peripheral surface of the drive cam is integrally formed as the wheel inclined surface; and/or the drive cam and the shaft body are integrally formed.
Further, a plurality of driving cam groups are arranged on the shaft body, each driving cam group comprises two driving cams, and the slope taper and the slope direction of the wheel slope surfaces of the driving cams are the same, wherein in each driving cam group, the directions of the radial expansion driving sections of the annular peripheral surfaces of the two driving cams are the same, and the directions of the radial expansion driving sections of the driving cam groups are staggered in the circumferential direction of the shaft body.
Furthermore, the peripheral surfaces of two ends of the shaft body are respectively provided with a first axial matching groove and/or a first axial matching block.
Further, an axially extending accommodating channel is formed at one end of the shaft body, the accommodating channel is used for inserting one end of a driving shaft so that a part of the accommodating channel forms an oil chamber, an annular oil groove is formed on the outer peripheral surface of one end of the shaft body, and an oil hole communicated with the oil chamber is formed on the groove bottom surface of the annular oil groove.
Furthermore, the other end of the shaft body is provided with an axially extending accommodating channel, the accommodating channel is used for inserting one end of the phase modulator control shaft so that a part of the accommodating channel forms an elastic part accommodating cavity, when the phase modulator control shaft is inserted in the accommodating channel, the phase modulator control shaft and the valve lift control shaft can synchronously rotate, and the valve lift control shaft can axially move relative to the phase modulator control shaft under the action of an elastic part arranged in the elastic part accommodating cavity.
In a second aspect, the present invention provides a valve rocker arm comprising an arm inclined surface for contacting the wheel inclined surface of the drive cam of the valve lift control shaft described in any of the above first aspects, the arm inclined surface having the same inclination direction and the same inclination taper as the wheel inclined surface.
Thus, since the valve rocker arm includes the arm inclined surface, and the inclined surface taper and the inclined direction of the arm inclined surface are the same as those of the wheel inclined surface, stable and reliable engagement can be formed between the arm inclined surface and the wheel inclined surface, so that the engagement position between the arm inclined surface and the wheel inclined surface can be axially changed when the valve lift control shaft is axially moved, thereby controlling the valve lift.
In a third aspect, the present invention provides a driving shaft, wherein an axially extending accommodating passage is formed at one end of the driving shaft, the accommodating passage is used for inserting one end of a shaft body of the valve lift control shaft in any one of the first aspect, so that a part of the accommodating passage forms an oil chamber, an annular oil groove is formed on an outer circumferential surface of the driving shaft, and an oil hole communicated with the oil chamber is formed on a bottom surface of the annular oil groove, wherein when the valve lift control shaft is inserted in the accommodating passage, the driving shaft and the valve lift control shaft can rotate synchronously, and the valve lift control shaft can move axially relative to the driving shaft along with the change of oil pressure in the oil chamber.
Like this, the one end cartridge of the axis body of valve lift control shaft is behind holding the passageway, will form the oil pocket in holding the passageway, like this, when the axis body is in initial position, the contact of wheel inclined plane and carminative valve rocker, valve lift control shaft will make the valve move with initial lift when rotating, begin the oiling when annular oil groove, hydraulic oil passes through the oilhole and enters into in the oil pocket, make the oil pressure in the oil pocket increase, thereby order to order about valve lift control axial one side axial displacement required distance, make the cooperation position between valve rocker and the wheel inclined plane change, thereby make the valve lift change, valve lift control shaft rotates then makes the valve move with the lift after changing.
Further, second axial fitting grooves and/or second axial fitting blocks which are alternately arranged in the circumferential direction are formed on the inner circumferential surface of the accommodating channel.
Still further, the other end of the driving shaft is provided with a signal wheel.
In a fourth aspect, the present invention provides a phase modulator control shaft, wherein an axially extending accommodating passage is formed at one end of the phase modulator control shaft, the accommodating passage is used for inserting the other end of the shaft body of the valve lift control shaft in the first aspect, so that a part of the accommodating passage is formed into an elastic member accommodating cavity, when the valve lift control shaft is inserted into the accommodating passage, the phase modulator control shaft and the valve lift control shaft can synchronously rotate, and the valve lift control shaft can axially move relative to the phase modulator control shaft under the action of an elastic member arranged in the elastic member accommodating cavity.
Thus, when the phase modulator control shaft is assembled with the valve lift control shaft, the other end of the shaft body of the valve lift control shaft is inserted into the accommodating channel to form an elastic piece accommodating cavity, an elastic piece such as a spring can be arranged in the elastic piece accommodating cavity and connected with one end of the shaft body of the valve lift control shaft, when the valve lift control shaft axially moves for a required distance to change the valve lift, the elastic piece can store energy such as compressed or stretched to store energy, and when the elastic piece starts to release energy, the valve lift control shaft is driven to reversely move to change the matching position between the valve rocker and the wheel inclined surface, so that the valve lift is changed.
Further, second axial fitting grooves and/or second axial fitting blocks which are alternately arranged in the circumferential direction are formed on the inner circumferential surface of the accommodating channel.
Furthermore, an accommodating channel extending in the axial direction is formed at the other end of the phase adjuster control shaft, an annular oil groove is formed in the outer peripheral surface of the phase adjuster control shaft, and an oil hole communicated with the accommodating channel is formed in the bottom surface of the annular oil groove.
In a fifth aspect, the present invention provides a shaft assembly, which includes the valve lift control shaft, the phaser control shaft and the drive shaft as described in any of the above first aspects, wherein one end of the valve lift control shaft is in transmission connection with the drive shaft, the other end of the valve lift control shaft is in transmission connection with the drive phaser control shaft, the valve lift control shaft, the phaser control shaft and the drive shaft can rotate synchronously, and the valve lift control shaft can move axially relative to the phaser control shaft and the drive shaft.
Thus, as described above, the valve lift is controlled by changing the fitting position between the rocker arm and the wheel inclined surface by the axial movement of the valve lift control shaft and the wheel inclined surface.
Further, the valve lift control shaft is provided so as to be axially movable under the action of oil pressure and elastic force applied to both ends thereof, respectively.
In addition, when the shaft assembly includes the valve lift control shaft according to any one of the first to fourth aspects, the drive shaft is the drive shaft according to any one of the third to fourth aspects, and the phaser control shaft is the phaser control shaft according to any one of the fourth to fifth aspects, wherein one end of the shaft body is inserted into the receiving passage at one end of the drive shaft to form the oil chamber, the other end of the shaft body is inserted into the receiving passage at one end of the phaser control shaft to form the elastic member receiving chamber, and an elastic member is disposed in the elastic member receiving chamber and connected to the other end of the shaft body.
In addition, the shaft assembly further includes the valve rocker arm described in the above second aspect, the arm inclined surface being fitted with the wheel inclined surface.
In a sixth aspect, the present invention provides a shaft assembly comprising the valve lift control shaft according to any one of the above first aspects and the valve rocker arm according to the above second aspect, wherein the valve lift control shaft is provided to be rotatable and axially movable, and the arm inclined surface is engaged with the wheel inclined surface.
Thus, as described above, since the valve rocker arm includes the arm inclined surface, and the inclined surface taper and the inclined direction of the arm inclined surface are the same as those of the wheel inclined surface, stable and reliable engagement can be formed between the arm inclined surface and the wheel inclined surface, so that the engagement position between the arm inclined surface and the wheel inclined surface can be axially changed when the valve lift control shaft is axially moved, thereby controlling the valve lift.
In a seventh aspect, the present invention provides an engine provided with the shaft assembly set forth in any of the fifth and sixth aspects above.
In an eighth aspect, the invention provides a vehicle provided with the engine of the seventh aspect above.
Drawings
FIG. 1 is a schematic perspective view of a valve lift control shaft according to an embodiment of the present invention;
FIG. 2 is a side view schematic illustration of the valve lift control shaft of FIG. 1;
FIG. 3 is a schematic end view of the structure of FIG. 2;
FIG. 4 is a schematic perspective view of a valve rocker arm according to an embodiment of the present invention, showing a spring mounted on the valve rocker arm;
FIG. 5 is a side view schematic of the valve rocker arm of FIG. 4;
FIG. 6 is a schematic perspective view of a drive shaft according to an embodiment of the present invention;
FIG. 7 is a side elevational schematic view of the drive shaft of FIG. 6;
FIG. 8 is a schematic end view of the structure of FIG. 7;
fig. 9 is a schematic perspective view of a phase modulator control shaft according to an embodiment of the present invention;
FIG. 10 is a side view schematic of the structure of FIG. 9;
fig. 11 is a schematic end view of the structure of fig. 10.
Description of the reference numerals
1-shaft body, 2-driving cam, 3-wheel inclined surface, 4-driving cam group, 5-accommodating channel, 6-oil cavity, 7-annular oil groove, 8-oil hole, 9-driving shaft, 10-accommodating cavity, 11-phaser control shaft, 12-valve rocker arm, 13-valve lift control shaft, 14-arm inclined surface, 15-second axial matching groove, 16-second axial matching block, 17-signal wheel, 18-elastic element, 19-first axial matching groove, 20-first axial matching block and 21-protruding surface.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In a first aspect, referring to fig. 1, 2 and 3, the valve lift control shaft according to the present invention includes a shaft body 1, a driving cam 2 is disposed on the shaft body 1, and at least a portion of an annular outer peripheral surface of the driving cam 2 in an axial direction is formed as a wheel inclined surface 3 for driving a valve, that is, the wheel inclined surface 3 is annular and includes a protruding surface 21 that protrudes radially outward and is continuous, so that when the valve lift control shaft rotates, the wheel inclined surface 3 can drive a rocker arm of the valve to operate.
Since at least a part of the annular outer peripheral surface of the driving cam 2 in the axial direction is formed as a wheel inclined surface 3 for driving the valve, when the shaft body 1 is at the initial position, the wheel inclined surface 3 contacts with a valve rocker of the valve, the valve moves in the initial lift when the valve lift control shaft rotates, and when the valve lift control shaft moves in the axial direction for a required distance, the wheel inclined surface 3 moves in the axial direction relative to the valve rocker, so that the matching position between the valve rocker and the wheel inclined surface 3 is changed, thereby changing the valve lift, and the valve lift control shaft rotates to move the valve in the changed lift, that is, the matching position between the valve rocker and the wheel inclined surface 3 is changed by the axial movement of the valve lift control shaft and the wheel inclined surface 3, thereby controlling the valve lift, and thus, the valve lift control shaft can effectively save the occupied space, due to the continuity of the inclined surface of the wheel, stepless adjustment of the valve lift can be realized.
In one embodiment, as shown in fig. 1 and 2, the annular outer peripheral surface of the drive cam 2 is integrally formed as the wheel inclined surface 3, that is, the outer peripheral surface of the drive cam 2 is integrally formed as the inclined surface, so that the thickness (axial distance) of the drive cam 2 can be reduced, and the valve lift adjustment with a larger distance (the integral axial length of the wheel inclined surface 3) can be realized, thereby further reducing the volume of the drive cam 2 and further saving the occupied space of the valve lift control shaft; and/or, the drive cam 2 and the shaft body 1 are integrally formed, for example, the drive cam 2 and the shaft body 1 may be formed by cutting the same bar. Of course, alternatively, the drive cam 2 may be a separate wheel body and may be fixedly fitted over the shaft body 1 to form the valve lift control shaft 13.
In addition, the number of the driving cams 2 on the shaft body 1 can be selected according to actual requirements, for example, the number of the driving cams 2 can be two to be suitable for a single-cylinder engine, or, a plurality of driving cam groups 4 are provided on the shaft body 1, for example, four driving cam groups 4 are shown in fig. 1 and 2, each driving cam group 4 includes two driving cams 2, the slope taper and the inclination direction of the wheel inclined surface 3 of the plurality of driving cams 2 are the same, wherein, in each driving cam group 4, the orientation of the radially enlarged driving sections of the annular outer peripheral surfaces of the two driving cams 2 is the same, and the orientation of the radially enlarged driving sections of the plurality of driving cam groups 4 is staggered in the circumferential direction of the shaft body. Therefore, when the valve lift control shaft moves axially, the valve lift of each driving cam group can be controlled.
In addition, the valve lift control shaft can be connected with the driving shaft through the power connector in actual use, the power connector comprises a first joint sleeve and a second joint sleeve which are sleeved together, can synchronously rotate and can axially move, the first joint sleeve is connected with the valve lift control shaft, and the second joint sleeve is connected with the driving shaft.
In addition, in one embodiment, as shown in fig. 1, the outer peripheral surfaces of both ends of the shaft body 1 are respectively formed with first axial engagement grooves 19 and/or first axial engagement blocks 20. For example, one end of the shaft body 1 can be engaged with the second axial engaging blocks 16 and the second axial engaging grooves formed alternately in the circumferential direction on the inner circumferential surface of the accommodating passage 5 at the one end of the drive shaft via the first axial engaging grooves 19 and the first axial engaging blocks 20, so that the rotation of the drive shaft brings the shaft body 1 into rotation, and at the same time, the shaft body 1 can be moved axially relative to the drive shaft via the movable engagement of one of the engaging blocks with the other engaging groove.
Of course, the axial movement of the shaft body 1 can be achieved by the above-described annular pick and fork, and also by the oil pressure change in the oil chamber formed on the drive shaft described later.
In addition, in the valve lift control shaft provided by the present invention, one end of the shaft body 1 may be a solid body or may be formed with a hollow section, so that one end of the shaft body 1 may be inserted into the receiving channel 5 of one end of the driving shaft 9 described below to form an oil chamber in the receiving channel 5 of the driving shaft 9, and when pressure oil is injected into the oil chamber, the hydraulic oil drives the shaft body 1 to move axially to change the valve lift.
Or, in one embodiment, one end of the shaft body 1 is formed with an axially extending accommodating passage 5, the accommodating passage 5 is used for inserting one end of the driving shaft 9 so that a part of the accommodating passage 5 forms an oil chamber 6, an annular oil groove 7 is formed on the outer peripheral surface of one end of the shaft body 1, and an oil hole 8 communicated with the oil chamber 6 is formed on the groove bottom surface of the annular oil groove 7, wherein when the driving shaft is inserted into the accommodating passage 5, the driving shaft and the shaft body 1 can synchronously rotate, and the valve lift control shaft can axially move relative to the driving shaft 9 along with the change of oil pressure in the oil chamber 6. In this way, the axial movement of the shaft body 1 can also be achieved by changing the oil pressure in the oil chamber. For example, the annular oil groove 7 is rotationally covered with an annular shell which can move axially with the shaft body 1 but which does not rotate, so that a flexible oil line can be connected to the annular shell.
Or, in another embodiment, the other end of the shaft body 1 is formed with an axially extending accommodating passage 5, the accommodating passage 5 is used for inserting one end of a phase adjuster control shaft 11 so that a part of the accommodating passage 5 forms an elastic member accommodating cavity 10, wherein when the phase adjuster control shaft is inserted in the accommodating passage 5, the phase adjuster control shaft 11 and the valve lift control shaft can synchronously rotate, and the valve lift control shaft can axially move relative to the phase adjuster control shaft 11 under the action of an elastic member arranged in the elastic member accommodating cavity 10. Thus, an elastic member, such as a spring, may be disposed in the elastic member receiving cavity and connected to the phase modulator control shaft 11 and the valve lift control shaft, respectively, such that when the valve lift control shaft is moved axially by a desired distance to change the valve lift, the elastic member will store energy, such as compressed or stretched, to store energy, and when the elastic member begins to release energy, the valve lift control shaft will be actuated to move in reverse to change the engagement position between the rocker arm and the inclined surface of the wheel, thereby changing the valve lift.
In a second aspect, the present invention provides a rocker arm, as shown in fig. 4 and 5, the rocker arm 12 including an arm inclined surface 14 for contacting the wheel inclined surface 3 of the drive cam 2 of the valve lift control shaft 13 described in any of the above first aspects, that is, the arm inclined surface 14 of the rocker arm 12 contacts the wheel inclined surface 3 of the drive cam 2 in actual use, and at the same time, the slope taper and the slope direction of the arm inclined surface 14 are the same as those of the wheel inclined surface 3.
Thus, since the rocker arm 12 includes the arm inclined surface 14, and the inclined surface taper and the inclined direction of the arm inclined surface 14 are the same as those of the wheel inclined surface 3, a stable and reliable inclined surface engagement can be formed between the arm inclined surface 14 and the wheel inclined surface 3, so that the engagement position between the arm inclined surface 14 and the wheel inclined surface 3 can be axially changed when the valve lift control shaft 13 is axially moved, thereby controlling the valve lift.
For example, the rocker arm 12 may be a rod body whose tip end surface is formed as an inclined surface having the same slope taper and the same slope direction as the wheel inclined surface 3.
In a third aspect, the present invention provides a driving shaft, as shown in fig. 6 and 7, an axially extending accommodating passage 5 is formed at one end of a driving shaft 9, the accommodating passage 5 is used for inserting one end of a shaft body 1 of the valve lift control shaft described in any one of the first aspect above, so that a part of the accommodating passage 5 is formed as an oil chamber 6, an annular oil groove 7 is formed on an outer peripheral surface of the driving shaft 9, and an oil hole 8 communicated with the oil chamber 6 is formed on a groove bottom surface of the annular oil groove 7, wherein when the valve lift control shaft is inserted into the accommodating passage 5, the driving shaft 9 and the valve lift control shaft can synchronously rotate, and the valve lift control shaft can axially move relative to the driving shaft 9 along with the change of oil pressure in the oil chamber 6.
Like this, the one end cartridge of the axis body 1 of valve lift control shaft 13 is in the back of the holding channel 5 of drive shaft 9, will form oil pocket 6 in holding channel 5, like this, when the axis body 1 is in initial position, wheel inclined plane 3 contacts with the valve's valve rocker 12, valve lift control shaft 13 will make the valve move with initial lift when rotating, begin the oiling when annular oil groove 7, hydraulic oil passes through oilhole 8 and enters into oil pocket 9, make the oil pressure of oil pocket 9 increase, thereby it to one side axial displacement required distance to order about valve lift control shaft 13, make the cooperation position between valve rocker 12 and the wheel inclined plane 3 change, thereby make the valve lift change, valve lift control shaft rotates and then makes the valve move with the lift after changing.
In addition, in order to be engaged with the first axial engagement grooves 19 and/or the first axial engagement blocks 20 formed on the outer peripheral surface of one end of the shaft body 1, as shown in fig. 6, the second axial engagement grooves 15 and/or the second axial engagement blocks 16 are formed alternately in the circumferential direction on the inner peripheral surface of the accommodating passage 5 of the drive shaft 9. One end of the shaft body 1 can be matched with the second axial matching blocks 16 and the second axial matching grooves which are alternately arranged in the circumferential direction and formed on the inner circumferential surface of the accommodating channel 5 at one end of the driving shaft through the first axial matching grooves 19 and the first axial matching blocks 20, so that the shaft body 1 can be driven to rotate when the driving shaft rotates, and meanwhile, the shaft body 1 can axially move relative to the driving shaft under the action of pressure oil in the oil cavity 9 through the movable matching of one matching block and the other matching groove.
In addition, as shown in fig. 6 and 8, the other end of the driving shaft 9 is provided with a signal wheel 17, and the signal wheel 17 can transmit the rotational position of the shaft body 1 by induction, for example, magnetic induction.
In a fourth aspect, the present invention provides a phase adjuster control shaft, as shown in fig. 9 and 10, an axially extending accommodating passage 5 is formed at one end of a phase adjuster control shaft 11, the accommodating passage 5 is used for inserting the other end of the shaft body 1 of the valve lift control shaft described in any one of the first aspects, so that a part of the accommodating passage 5 forms an elastic member accommodating cavity 10, when the valve lift control shaft is inserted into the accommodating passage 5, the phase adjuster control shaft 11 and the valve lift control shaft can rotate synchronously, and the valve lift control shaft can move axially relative to the phase adjuster control shaft 11 under the action of an elastic member arranged in the elastic member accommodating cavity 10.
Thus, when the phase modulator control shaft 11 is assembled with the valve lift control shaft 13, the other end of the shaft body 1 of the valve lift control shaft 13 is inserted into the accommodating passage to form the elastic member accommodating cavity 10, the elastic member 18, such as a spring, may be disposed in the elastic member accommodating cavity 10 and connected to one end of the shaft body 1 of the valve lift control shaft 13, when the valve lift control shaft 13 axially moves a required distance to change the valve lift, the elastic member 18 may store energy, such as compressed or stretched to store energy, and when the elastic member 18 starts to release energy, the valve lift control shaft 13 may be driven to move reversely to change the matching position between the rocker arm and the wheel inclined surface, thereby changing the valve lift.
In addition, in order to be fitted with the first axial fitting grooves 19 and/or the first axial fitting blocks 20 formed on the outer peripheral surface of the other end of the shaft body 1, as shown in fig. 11, and referring to fig. 6, second axial fitting grooves 15 and/or second axial fitting blocks 16 alternately arranged in the circumferential direction are formed on the inner peripheral surface of the accommodating passage 5. Thus, the other end of the shaft body 1 can be matched with a second axial matching block 16 and a second axial matching groove which are alternately arranged in the circumferential direction and formed on the inner circumferential surface of the accommodating channel 5 at one end of the phase modulator control shaft 11 through the first axial matching groove 19 and the first axial matching block 20, when the valve lift control shaft 13 rotates, the phase modulator control shaft 11 can be driven to rotate, meanwhile, through the movable matching of the matching block on one side and the matching groove on the other side, the shaft body 1 can axially move relative to the driving shaft under the action of pressure oil in the oil cavity 9 so that the elastic element is compressed and stored with energy, and after the oil pressure in the oil cavity 9 is reduced, the elastic element 18 releases energy to reversely push the shaft body 1 to move so as to change the matching position between the valve rocker and the wheel inclined surface, and further change the valve lift.
Further, as shown in fig. 9 and 10, the other end of the phaser control shaft 11 is formed with an axially extending accommodating passage 5, an annular oil groove 7 is formed on the outer peripheral surface of the phaser control shaft 11, and oil holes 8 communicating with the accommodating passage 5 are formed on the groove bottom surface of the annular oil groove 7. In this way, by adjusting the oil pressure in the accommodating passage 5, the other end of the phaser control shaft 11 can be made to cooperate with VVT (variable valve timing) to achieve the valve timing adjusting effect.
In addition, in a fifth aspect, the present invention provides a shaft assembly, which includes the valve lift control shaft 13, the phaser control shaft 11 and the drive shaft 9 as described in any of the above, wherein one end of the valve lift control shaft 13 is in transmission connection with the drive shaft 9, the other end of the valve lift control shaft 13 is in transmission connection with the drive phaser control shaft 11, the valve lift control shaft 13, the phaser control shaft 11 and the drive shaft 9 can rotate synchronously, and the valve lift control shaft 13 can move axially relative to the phaser control shaft 11 and the drive shaft 9.
Thus, as described above, the valve lift is controlled by changing the fitting position between the rocker arm and the wheel inclined surface by the axial movement of the valve lift control shaft and the wheel inclined surface.
Of course, in this shaft assembly, the axial movement of the valve lift control shaft 13 may be achieved in various ways, for example, by the annular paddle and the shift fork described above. Alternatively, in one embodiment, the valve lift control shaft 13 is configured to be axially movable under the action of oil pressure and elastic force applied to both ends thereof. In this way, the valve lift control shaft 13 is axially moved by the interaction of the oil pressure and the elastic force, and the movement of the valve lift control shaft 13 can be made more stable due to the continuously adjustable stability of the oil pressure.
Or, in another embodiment, when the shaft assembly comprises the valve lift control shaft 13 according to one of the first aspect, the drive shaft 9 is a drive shaft according to any of the third aspect, and the phaser control shaft 11 is a phaser control shaft according to any of the fourth aspect, wherein one end of the shaft body 1 is inserted into the accommodating channel 5 at one end of the drive shaft 9 to form the oil chamber 6, the other end of the shaft body 1 is inserted into the accommodating channel 5 at one end of the phaser control shaft 11 to form the elastic member accommodating chamber 10, the elastic member accommodating chamber 10 is provided with the elastic member 18, and the elastic member 18 is connected to the other end of the shaft body 1. Thus, when the oil chamber 6 is filled with hydraulic oil, the driving shaft body 1 is moved to change the valve lift and compress the elastic member 18, and when the oil pressure is reduced, the elastic member 18 starts to release energy to drive the shaft body 1 to move reversely to change the valve lift.
Furthermore, the axle assembly comprises a valve rocker arm 12 as described above in relation to the second aspect, the arm ramp surface 14 cooperating with the wheel ramp surface 3. Thus, as described above, since the valve rocker arm includes the arm inclined surface, and the inclined surface taper and the inclined direction of the arm inclined surface are the same as those of the wheel inclined surface, a stable and reliable engagement can be formed between the arm inclined surface and the wheel inclined surface, so that the engagement position between the arm inclined surface and the wheel inclined surface can be axially changed when the valve lift control shaft is axially moved, thereby controlling the valve lift.
In addition, in a sixth aspect, the present invention provides a shaft assembly including the valve lift control shaft 13 described in any one of the above first aspects and the rocker arm 12 described in the above second aspect, wherein the valve lift control shaft 13 is provided to be rotatable and axially movable, and the arm inclined surface 14 is engaged with the wheel inclined surface 3.
Thus, as described above, since the valve rocker arm includes the arm inclined surface, and the inclined surface taper and the inclined direction of the arm inclined surface are the same as those of the wheel inclined surface, a stable and reliable engagement can be formed between the arm inclined surface and the wheel inclined surface, so that the engagement position between the arm inclined surface and the wheel inclined surface can be axially changed when the valve lift control shaft is axially moved, thereby controlling the valve lift.
In a seventh aspect, the present invention provides an engine provided with the shaft assembly of any of the above fifth and sixth aspects.
In an eighth aspect, the invention provides a vehicle provided with the engine of the above seventh aspect.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (20)

1. The valve lift control shaft is characterized by comprising a shaft body (1), wherein a driving cam (2) is arranged on the shaft body (1), and at least one part of the annular outer peripheral surface of the driving cam (2) in the axial direction is formed into a wheel inclined surface (3) for driving a valve.
2. The valve lift control shaft according to claim 1, characterized in that an annular outer peripheral surface of the drive cam (2) is integrally formed as the wheel inclined surface (3); and/or the driving cam (2) and the shaft body (1) are integrally formed.
3. The valve lift control shaft according to claim 1, characterized in that a plurality of drive cam groups (4) are provided on the shaft body (1), each drive cam group (4) comprises two drive cams (2), and the slope taper and the slope direction of the wheel slope surfaces (3) of the plurality of drive cams (2) are the same, wherein in each drive cam group (4), the orientation of the radially enlarged drive sections of the annular outer peripheral surfaces of the two drive cams (2) is the same, and the orientation of the radially enlarged drive sections of the plurality of drive cam groups (4) is staggered in the circumferential direction of the shaft body.
4. The valve lift control shaft according to any one of claims 1 to 3, characterized in that a first axial engagement groove (19) and/or a first axial engagement block (20) is formed on the outer peripheral surface of both ends of the shaft body (1), respectively.
5. Valve lift control shaft according to any one of claims 1 to 3, one end of the shaft body (1) is formed with an axially extending accommodating channel (5), the accommodating channel (5) is used for inserting one end of a driving shaft (9) so that a part of the accommodating channel (5) is formed as an oil chamber (6), an annular oil groove (7) is formed on the outer peripheral surface of one end of the shaft body (1), an oil hole (8) communicated with the oil cavity (6) is formed on the bottom surface of the annular oil groove (7), wherein, when the driving shaft is inserted in the containing channel (5), the driving shaft (9) and the shaft body (1) can synchronously rotate, the valve lift control shaft is axially movable relative to the drive shaft (9) in accordance with a change in oil pressure in the oil chamber (6).
6. Valve lift control shaft according to any of claims 1 to 3, characterized in that the other end of the shaft body (1) is formed with an axially extending receiving channel (5), the receiving channel (5) being adapted to receive one end of a phaser control shaft (11) such that a portion of the receiving channel (5) forms an elastomeric receiving cavity (10), wherein the phaser control shaft (11) and the valve lift control shaft are synchronously rotatable when the phaser control shaft is inserted in the receiving channel (5), and the valve lift control shaft is axially movable relative to the phaser control shaft (11) under the influence of an elastomeric element arranged in the elastomeric receiving cavity (10).
7. A valve rocker arm, characterized in that the valve rocker arm (12) comprises an arm inclined surface (14) for contacting the wheel inclined surface (3) of the drive cam (2) of the valve lift control shaft (13) according to any one of claims 1 to 6, the arm inclined surface (14) having the same slope taper and slope direction as the wheel inclined surface (3).
8. A drive shaft, characterized in that one end of the drive shaft (9) is formed with an axially extending receiving channel (5), the receiving channel (5) is used for plugging one end of a shaft body (1) of a valve lift control shaft according to any one of claims 1 to 4 such that a portion of the receiving channel (5) is formed as an oil chamber (6), an annular oil groove (7) is formed on the outer peripheral surface of the driving shaft (9), an oil hole (8) communicated with the oil chamber (6) is formed on the bottom surface of the annular oil groove (7), wherein when the valve lift control shaft is inserted in the accommodating channel (5), the driving shaft (9) and the valve lift control shaft can synchronously rotate, the valve lift control shaft is axially movable relative to the drive shaft (9) in accordance with a change in oil pressure in the oil chamber (6).
9. The drive shaft according to claim 8, characterized in that the inner circumferential surface of the receiving channel (5) is formed with second axial fitting grooves (15) and/or second axial fitting blocks (16) arranged alternately in the circumferential direction.
10. The drive shaft according to claim 8 or 9, characterized in that the other end of the drive shaft (9) is provided with a signal wheel (17).
11. A phase modifier control shaft, characterized in that, one end of phase modifier control shaft (11) is formed with the passageway (5) that holds of axial extension, hold passageway (5) be used for cartridge claim 1-4 any one the other end of the body (1) of valve lift control shaft so that hold a part of passageway (5) and form elastic component and hold chamber (10), when holding passageway (5) interpolation and being equipped with valve lift control shaft, phase modifier control shaft (11) and valve lift control shaft can rotate synchronously, valve lift control shaft can hold chamber (10) the effect of the elastic component that sets up in and for phase modifier control shaft (11) axial displacement.
12. Phase modulator control shaft according to claim 11, characterized in that said housing channel (5) has on its inner peripheral surface second axial mating grooves (15) and/or second axial mating blocks (16) arranged alternately in the circumferential direction.
13. A phase adjuster control shaft according to claim 11 or 12, wherein the other end of said phase adjuster control shaft (11) is formed with an axially extending accommodating passage (5), an annular oil groove (7) is formed on an outer peripheral surface of said phase adjuster control shaft (11), and an oil hole (8) communicating with said accommodating passage (5) is formed on a groove bottom surface of said annular oil groove (7).
14. A shaft assembly, characterized by comprising a valve lift control shaft (13), a phaser control shaft (11) and a drive shaft (9) according to any one of claims 1-6, wherein one end of the valve lift control shaft (13) is in driving connection with the drive shaft (9), the other end of the valve lift control shaft (13) is in driving connection with the drive phaser control shaft (11), the valve lift control shaft (13), the phaser control shaft (11) and the drive shaft (9) are capable of synchronous rotation, and the valve lift control shaft (13) is capable of axial movement relative to the phaser control shaft (11) and the drive shaft (9).
15. A shaft assembly according to claim 14, characterised in that the valve lift control shaft (13) is arranged to be axially displaceable under the influence of oil pressure and spring force respectively applied to both ends.
16. Shaft assembly according to claim 15, characterized in that, when the shaft assembly comprises a valve lift control shaft (13) according to claim 4, the drive shaft (9) is a drive shaft according to any one of claims 8-10 and the phaser control shaft (11) is a phaser control shaft according to any one of claims 11-13, wherein,
one end of the shaft body (1) is inserted into the accommodating channel (5) at one end of the driving shaft (9) to form the oil chamber (6), the other end of the shaft body (1) is inserted into the accommodating channel (5) at one end of the phase adjuster control shaft (11) to form the elastic member accommodating cavity (10), an elastic member (18) is arranged in the elastic member accommodating cavity (10), and the elastic member (18) is connected to the other end of the shaft body (1).
17. The axle assembly according to any of the claims 14-16, characterized in that it further comprises a valve rocker arm (12) according to claim 7, the arm inclination (14) cooperating with the wheel inclination (3).
18. A shaft assembly, characterized in that it comprises a valve lift control shaft (13) according to any one of claims 1-6 and a valve rocker (12) according to claim 7, wherein the valve lift control shaft (13) is arranged to be rotatable and axially movable, and the arm inclined surface (14) cooperates with the wheel inclined surface (3).
19. An engine, characterized in that it is provided with a shaft assembly according to any one of claims 14-18.
20. A vehicle characterized in that the vehicle is provided with the engine of claim 19.
CN202010858662.8A 2020-08-24 2020-08-24 Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle Pending CN114087049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010858662.8A CN114087049A (en) 2020-08-24 2020-08-24 Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010858662.8A CN114087049A (en) 2020-08-24 2020-08-24 Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle

Publications (1)

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CN114087049A true CN114087049A (en) 2022-02-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010858662.8A Pending CN114087049A (en) 2020-08-24 2020-08-24 Valve lift control shaft, valve rocker arm, drive shaft, phase modulator control shaft, shaft assembly, engine and vehicle

Country Status (1)

Country Link
CN (1) CN114087049A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329895A (en) * 1992-09-30 1994-07-19 Mazda Motor Corporation System for controlling valve shift timing of an engine
JP2003049672A (en) * 2001-05-31 2003-02-21 Toyota Motor Corp Variable valve system for internal combustion engine
CN102182529A (en) * 2011-05-24 2011-09-14 奇瑞汽车股份有限公司 Variable lift camshaft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329895A (en) * 1992-09-30 1994-07-19 Mazda Motor Corporation System for controlling valve shift timing of an engine
JP2003049672A (en) * 2001-05-31 2003-02-21 Toyota Motor Corp Variable valve system for internal combustion engine
CN102182529A (en) * 2011-05-24 2011-09-14 奇瑞汽车股份有限公司 Variable lift camshaft

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