WO2021253387A1 - Camshaft phaser and working method therefor - Google Patents

Camshaft phaser and working method therefor Download PDF

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Publication number
WO2021253387A1
WO2021253387A1 PCT/CN2020/097060 CN2020097060W WO2021253387A1 WO 2021253387 A1 WO2021253387 A1 WO 2021253387A1 CN 2020097060 W CN2020097060 W CN 2020097060W WO 2021253387 A1 WO2021253387 A1 WO 2021253387A1
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WO
WIPO (PCT)
Prior art keywords
oil
stop
rotor
stator
cavity portion
Prior art date
Application number
PCT/CN2020/097060
Other languages
French (fr)
Chinese (zh)
Inventor
钱其伟
王朋
吴晓辉
Original Assignee
舍弗勒技术股份两合公司
钱其伟
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Publication date
Application filed by 舍弗勒技术股份两合公司, 钱其伟 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2020/097060 priority Critical patent/WO2021253387A1/en
Publication of WO2021253387A1 publication Critical patent/WO2021253387A1/en

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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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear

Definitions

  • the invention relates to a camshaft phaser and a working method of the camshaft phaser.
  • variable valve timing system is an important part of ensuring the performance of the engine. It can adjust the opening and closing time of the engine's valves according to the needs, so that the engine can obtain the desired power output, fuel consumption and emissions.
  • the variable valve timing system includes a camshaft phaser for adjusting the opening and closing phases of the engine valves.
  • camshaft phasers there are various types of camshaft phasers, such as a camshaft phaser that only uses hydraulic pressure to achieve phase adjustment, a camshaft phaser that uses a motor to achieve phase adjustment, and a camshaft that uses the torque of a camshaft to achieve a clutch mechanism.
  • camshaft phaser for phase modulation has the following problems.
  • the response speed of the camshaft phaser is not high enough, so it cannot meet the occasions with high requirements for phase modulation speed.
  • the present invention has been made based on the above-mentioned shortcomings of the prior art.
  • the purpose of the present invention is to provide a new type of camshaft phaser, which has the characteristics of simple structure and low cost and high phase modulation speed.
  • Another objective of the present invention is to provide a working method of the aforementioned camshaft phaser.
  • the present invention provides a camshaft phaser as follows, which has an axial direction, a radial direction and a circumferential direction, and the camshaft phaser includes a stator and a rotor assembled together,
  • the rotor is disposed on the radially inner side of the stator and is rotatable relative to the stator.
  • the rotor is formed with a plurality of recesses that are recessed from its outer peripheral surface toward the radially inner side and are spaced apart from each other.
  • the inner peripheral surface of the stator forms a stop oil cavity
  • the camshaft phaser also includes a one-way stop mechanism disposed in each of the stop oil chambers, and the one-way stop mechanism in the first stop oil chamber of the stop oil chamber can play To prevent the rotor from rotating toward the circumferential side with respect to the stator, the stopping function can be released/recovered in a controlled manner, and the second stop oil chamber in the stop oil chamber
  • the one-way stop mechanism can play a stop function of preventing the rotor from rotating toward the other side in the circumferential direction relative to the stator, and can release/restore the stop function in a controlled manner.
  • the one-way stop mechanism includes a cylindrical roller and an elastic member
  • each of the cylindrical rollers separates the corresponding stop oil cavity into a small cavity part and a large cavity part that are independent of each other, the first stop oil cavity
  • the small cavity portion of the second stop oil cavity and the small cavity portion of the second stop oil cavity are in controlled communication with the oil inlet channel or the oil discharge channel through different channels, and
  • the elastic member applies an elastic force to the cylindrical roller toward the small cavity portion, so that the cylindrical roller can abut against the stator and the cylindrical roller without oil pressure acting on the cylindrical roller.
  • the rotor so as to achieve the stop function.
  • the size of the first stop oil cavity in the radial direction gradually increases toward one side in the circumferential direction, and the small cavity part is located in the large cavity in the first stop oil cavity. Part of the circumference to the other side, and
  • the size of the second stop oil cavity in the radial direction gradually increases toward the other side of the circumferential direction, and the small cavity part is located on the circumference of the large cavity part in the second stop oil cavity. To one side.
  • the large cavity of the first stop oil chamber is partially connected to the oil inlet passage or the oil discharge passage in a controlled manner, and the large cavity of the second stop oil cavity is partially controlled to communicate with the oil inlet passage or the oil discharge passage.
  • the oil drain channel is connected.
  • both the large cavity portion of the first stop oil cavity and the large cavity portion of the second stop oil cavity are always in communication with the atmosphere.
  • the cylindrical roller is hollow.
  • the rotor includes a cylindrical rotor body and at least one rotor blade protruding radially outward from the rotor body, the stator is formed with a phase modulation oil cavity corresponding to the blade, and the rotor The blade is located in the phase modulation oil chamber and can rotate within a predetermined range relative to the stator in the phase modulation oil chamber,
  • the recess is provided in a part of the rotor body that does not overlap with the phase modulation oil chamber or the recess is provided in the rotor blade.
  • the rotor blade divides the corresponding phase-modulating oil chamber into a first phase-modulating oil chamber part and a second phase-modulating oil chamber part that are independent of each other, and the first phase-modulating oil chamber part and the The second phase modulating oil chamber part is in controlled communication with the oil inlet passage or the oil discharge passage through different passages.
  • first stop oil cavity and the second stop oil cavity are alternately and evenly distributed in the circumferential direction.
  • the present invention also provides a working method of the camshaft phaser according to any one of the above technical solutions, and the working method includes:
  • the small cavity portion of the first stop oil cavity communicates with the oil inlet passage so that the small cavity portion is filled with oil
  • the The small cavity portion of the second stop oil chamber communicates with the oil drain passage to drain oil from the small cavity portion, so that the one-way stop mechanism in the first stop oil chamber unblocks the rotor relative to the
  • the stator has the function of stopping rotation toward one side in the circumferential direction, and the one-way stopping mechanism in the second stopping oil chamber maintains the stopping function of preventing the rotor from rotating toward the other side of the circumferential direction relative to the stator;
  • the small cavity portion of the first stop oil cavity is in communication with the oil drain passage so that oil is drained from the small cavity portion.
  • the small cavity portion of the second stop oil cavity is in communication with the oil inlet passage so that the small cavity portion is filled with oil, so that the one-way stop mechanism in the first stop oil cavity keeps preventing the rotor from being relative to the
  • the stator has the function of stopping rotation toward one side in the circumferential direction, and the one-way stop mechanism in the second stop oil chamber releases the stopping function of preventing the rotor from rotating toward the other side of the circumferential direction with respect to the stator ;as well as
  • the small cavity portion of the first stop oil cavity and the small cavity portion of the second stop oil cavity are not filled with oil, so that the first
  • the one-way stop mechanism in a stop oil chamber maintains the stop function of preventing the rotor from rotating toward the circumferential side relative to the stator
  • the one-way stop mechanism in the second stop oil chamber maintains A stop function for preventing the rotor from rotating toward the other side in the circumferential direction relative to the stator.
  • the present invention provides a camshaft phaser and its working method.
  • Two kinds of stop oil chambers are formed between the rotor and the stator of the camshaft phaser, and one-way stop mechanisms are set in each stop oil chamber, and the first one is the one-way stop mechanism in the stop oil chamber It can prevent the rotor from rotating toward the circumferential side relative to the stator, and can release/restore the stop in a controlled manner.
  • the one-way stop mechanism in the second stop oil cavity can prevent the rotor from rotating. With respect to the stop function of the stator rotating toward the other side in the circumferential direction, the stop function can be released/recovered in a controlled manner.
  • the camshaft phaser according to the present invention not only has a simpler structure and lower cost, but also has a higher phase modulation speed.
  • Fig. 1 is a schematic cross-sectional view of a camshaft phaser according to a first embodiment of the present invention.
  • Fig. 2 is a schematic cross-sectional view of a camshaft phaser according to a second embodiment of the present invention.
  • Fig. 3 is a schematic cross-sectional view of a camshaft phaser according to a third embodiment of the present invention.
  • the axial, radial and circumferential directions of the present invention refer to the axial, radial and circumferential directions of the camshaft phaser (stator and rotor) respectively, where the axial direction is shown in Figures 1 to The direction perpendicular to the paper in Figure 3, one side in the circumferential direction refers to the downstream side in the counterclockwise direction in Figures 1 to 3, and the other side in the circumferential direction refers to the clockwise direction in Figures 1 to 3 The downstream side.
  • the structure and working method of the camshaft phaser according to the present invention will be described with reference to the accompanying drawings of the specification.
  • the camshaft phaser includes a stator 1, a rotor 2 and a one-way stop mechanism 3 assembled together.
  • the stator 1 includes a cylindrical stator main body 11, and the rotor 2 includes a cylindrical rotor main body 21 located in the stator main body 11.
  • the rotor main body 21 and the stator main body 11 are coaxially provided on the diameter of the stator 1. It is inward and can rotate relative to the stator main body 11 in the circumferential direction CR.
  • the rotor main body 21 is formed with two recessed portions that are recessed toward the radially inner side from the outer peripheral surface thereof and spaced apart from each other.
  • the two recesses are line-symmetrical with respect to a straight line passing through the center of the rotor main body 21.
  • the two recesses and the inner peripheral surface of the stator body 11 respectively form a first stop oil chamber C1 (the stop oil chamber on the left in Figure 1) and a second stop oil chamber C2 (the stop oil on the right in Figure 1). Cavity).
  • the size of the first stop oil chamber C1 in the radial direction gradually increases toward one side in the circumferential direction
  • the size of the second stop oil chamber C2 in the radial direction gradually increases toward the other side in the circumferential direction.
  • the one-way stopper mechanism 3 is provided in each stopper oil chamber C1, C2.
  • Each one-way stop mechanism 3 includes a cylindrical roller 31 and an elastic member 32.
  • the cylindrical roller 31 is housed in the corresponding stop oil chambers C1 and C2 in such a way that its central axis is parallel to the central axis of the rotor main body 21.
  • the cylindrical roller 31 divides the first stop oil cavity C1 into a first small cavity portion C11 and a first large cavity portion C12 that are independent of each other, and the first small cavity portion C11 is located on the other side of the first large cavity portion C12 in the circumferential direction ;
  • Cylindrical roller 31 separates the second stop oil cavity C2 into a second small cavity portion C21 and a second large cavity portion C22 that are independent of each other, the second small cavity portion C21 is located on the circumferential side of the second large cavity portion C22 .
  • the first small cavity portion C11 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first small cavity passage A1 formed in the rotor body 21, and the second large cavity portion C22 is formed in the rotor body 21
  • the second large cavity channel A2 can be controlled to communicate with the oil inlet channel or the oil discharge channel.
  • the first small cavity portion C11 and the second large cavity portion C22 are simultaneously connected with the oil inlet channel or simultaneously with the oil discharge channel.
  • the first small cavity channel A1 and the second large cavity channel A2 both extend in the radial direction, and the radially inner opening of the first small cavity channel A1 and the radially inner opening of the second large cavity channel A2 are at the same one. Axial position.
  • the second small cavity portion C21 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the second small cavity passage B2 formed in the rotor main body 21, and the first large cavity portion C12 is formed in the rotor main body 21.
  • the inner first large cavity passage B1 can be communicated with the oil inlet passage or the oil discharge passage in a controlled manner.
  • the second small cavity portion C21 and the first large cavity portion C12 are simultaneously connected with the oil inlet channel or simultaneously with the oil discharge channel.
  • the second small cavity channel B2 and the first large cavity channel B1 both extend in the radial direction, and the radially inner opening of the second small cavity channel B2 and the radially inner opening of the first large cavity channel B1 are at the same other.
  • the elastic member 32 may be, for example, a cylindrical coil spring.
  • the elastic member 32 is housed in each large cavity portion (the first large cavity portion C12 and the second large cavity portion C22).
  • One end of the elastic member 32 abuts against the rotor body 21, and the other end always applies the cylindrical roller 31 toward each The elastic force of the small cavity portion (the first small cavity portion C11 and the second small cavity portion C21).
  • the other end of the elastic member 32 and the cylindrical roller 31 are not relatively fixed.
  • each one-way stopper mechanism 3 realizes the following Stop action: the one-way stop mechanism 3 in the first stop oil chamber C1 can prevent the rotor 2 from rotating toward the circumferential side with respect to the stator 1 and the stop function in the second stop oil chamber C2
  • the one-way stop mechanism 3 can serve as a stop function for preventing the rotor 2 from rotating toward the other side in the circumferential direction with respect to the stator 1.
  • the stop function of the one-way stop mechanism 3 in the first stop oil chamber C1 can be cancelled. Draining the oil from the small cavity portion C11 can restore the stopping effect; and by filling the second small cavity portion C21 with high-pressure oil while draining the second large cavity portion C22, the one-way stop in the second stop oil cavity C2 can be released. The stopping function of the moving mechanism 3 can be restored by draining oil from the second small cavity portion C21.
  • the first small cavity portion C11 communicates with the oil inlet passage through the first small cavity passage A1 so that the The small cavity portion C11 is filled with oil
  • the second large cavity portion C22 communicates with the oil inlet passage through the second large cavity passage A2 so that the second large cavity portion C22 is filled with oil
  • the second small cavity portion C21 passes through the first
  • the two small cavity passages B2 communicate with the oil drain passage to drain oil from the second small cavity portion C21
  • the first large cavity portion C12 communicates with the oil drain passage through the first large cavity passage B1 so as to drain from the first large cavity portion C12 Oil.
  • the cylindrical roller 31 of the one-way stop mechanism 3 in the first stop oil chamber C1 at least partially unblocks the rotor 2 from relative to the stator 1.
  • the one-way stop mechanism in the second stop oil chamber C2 is used to stop the rotation on the side toward the circumferential direction, and under the action of the oil pressure of the oil in the second large cavity portion C22 and the elastic force of the elastic member 32 3 Maintain the stop function that prevents the rotor 2 from rotating toward the other side in the circumferential direction relative to the stator 1, and further utilize the torque of the camshaft to realize the phase modulation of the rotor 2 relative to the stator 1 in the circumferential direction.
  • the first small cavity portion C11 communicates with the oil discharge passage through the first small cavity passage A1 so that the first small cavity portion C11 is discharged
  • the second large cavity portion C22 communicates with the oil discharge passage through the second large cavity passage A2 so that oil is drained from the second large cavity portion C22
  • the second small cavity portion C21 passes through the second small cavity passage B2
  • Connecting with the oil inlet passage makes the second small cavity part C21 filled with oil
  • the first large cavity part C12 communicates with the oil inlet passage through the first large cavity passage B1 so that the first large cavity part C12 is filled with oil.
  • the cylindrical roller 31 of the one-way stop mechanism 3 in the second stop oil chamber C2 at least partially unblocks the rotor 2 from relative to the stator 1.
  • the one-way stop in the first stop oil cavity C1 The mechanism 3 maintains the stop function of preventing the rotor 2 from rotating to one side in the circumferential direction relative to the stator 1, and further uses the torque of the camshaft to realize the phase modulation of the rotor 2 relative to the stator 1 in the other side of the circumferential direction.
  • the first small cavity portion C11 of the first stop oil cavity C1 communicates with the oil drain passage through the first small cavity passage A1 so that the first small cavity
  • the cavity portion C11 drains oil
  • the second small cavity portion C21 of the second stop oil cavity C2 communicates with the oil drain passage so that the oil is drained from the second small cavity portion C21.
  • the cylindrical roller 31 of the one-way stop mechanism 3 in the first stop oil chamber C1 is held/restored to prevent the rotor 2 from rotating toward the circumferential side relative to the stator 1
  • the cylindrical roller 31 of the one-way stop mechanism 3 in the second stop oil chamber C2 retains/restores the stop function to prevent the rotor 2 from rotating toward the other side in the circumferential direction relative to the stator 1. At this time, the rotor 2 cannot rotate relative to the stator 1.
  • the basic structure of the camshaft phaser according to the second embodiment of the present invention is substantially the same as the basic structure of the camshaft phaser according to the first embodiment of the present invention, and only the differences between the two will be described below.
  • the rotor 2 in addition to the cylindrical rotor body 21 also includes one (or more) rotor blades 22 extending from the rotor body 21 toward the radially outer side.
  • the stator body 11 of the stator 1 includes Corresponding to the sector-shaped phase-modulating oil chamber C3, the rotor blade 22 is located in the phase-modulating oil chamber C3 and can rotate within a predetermined range relative to the stator 1 in the phase-modulating oil chamber C3.
  • the recesses for forming the stopper oil chambers C1 and C2 are provided in the portion of the rotor main body 21 that does not overlap with the phase adjusting oil chamber C3.
  • the rotor blade 22 divides the corresponding phase modulation oil chamber C3 into a first phase modulation oil chamber part C31 and a second phase modulation oil chamber part C32 that are independent of each other, and the first phase modulation oil chamber part C31 is located in the second phase modulation oil chamber part C32.
  • the first phase adjustment oil chamber portion C31 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first phase adjustment oil chamber passage A3 formed in the rotor main body 21, and the second phase adjustment oil chamber portion C32 is formed in the rotor
  • the second phase modulation oil chamber passage B3 in the main body 21 can be controlled to communicate with the oil inlet passage or the oil discharge passage.
  • the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are in communication with the oil inlet channel or with the oil discharge channel at the same time;
  • the second phase modulating oil cavity channel B3 and the second small cavity channel B2, the second phase modulating oil cavity portion C32 and the second small cavity portion C21 are connected to the oil inlet channel or simultaneously to the oil discharge channel.
  • the operating method of the camshaft phaser according to the second embodiment of the present invention is similar to the operating method of the camshaft phaser according to the first embodiment of the present invention. Only in the working method of the camshaft phaser according to the second embodiment of the present invention, the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are simultaneously connected to the oil inlet passage or simultaneously communicated with the oil discharge passage. The second phase modulating oil cavity portion C32 and the second small cavity portion C21 are in communication with the oil inlet channel or with the oil discharge channel at the same time.
  • the camshaft phaser according to the second embodiment of the present invention can not only reduce or even eliminate the excessive response speed of the camshaft phaser according to the first embodiment of the present invention.
  • the possible overshoot problem can also limit the rotation range of the rotor 2 relative to the stator 1.
  • the basic structure of the camshaft phaser according to the third embodiment of the present invention is substantially the same as the basic structure of the camshaft phaser according to the first embodiment of the present invention, and only the differences between the two will be described below.
  • the rotor 2 in addition to the cylindrical rotor body 21, the rotor 2 also includes two (or more) rotor blades 22 extending from the rotor body 21 toward the radially outer side.
  • the stator 1 includes a cylindrical rotor body 21.
  • the stator main body 11 also includes two (or more) stator protrusions 12 protruding from the stator main body 11 toward the radially inner side.
  • Two sector-shaped phase modulation oil chambers C3 corresponding to the rotor blades 22 are formed between the two stator protrusions 12, and each rotor blade 22 is located in the corresponding phase modulation oil chamber C3 and can be opposed to each other in the phase modulation oil chamber C3
  • the stator 1 rotates in a predetermined range.
  • the recesses for forming the stopper oil chambers C1 and C2 are provided on the outer peripheral surface of the rotor blade 22. Therefore, a part of the first small cavity channel A1, the first large cavity channel B1, the second small cavity channel B2, and the second large cavity channel A2 are located in the rotor body 21, and the other part is located in the rotor blade 22.
  • the rotor blade 22 divides the corresponding phase modulation oil chamber C3 into a first phase modulation oil chamber part C31 and a second phase modulation oil chamber part C32 that are independent of each other, and the first phase modulation oil chamber part C31 is located in the second phase modulation oil chamber part C32.
  • the first phase adjustment oil chamber portion C31 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first phase adjustment oil chamber passage A3 formed in the rotor main body 21, and the second phase adjustment oil chamber portion C32 is formed in the rotor
  • the second phase modulation oil chamber passage B3 in the main body 21 can be controlled to communicate with the oil inlet passage or the oil discharge passage.
  • the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are in communication with the oil inlet channel or with the oil discharge channel at the same time;
  • the second phase modulating oil cavity channel B3 and the second small cavity channel B2, the second phase modulating oil cavity portion C32 and the second small cavity portion C21 are connected to the oil inlet channel or simultaneously to the oil discharge channel.
  • the operating method of the camshaft phaser according to the third embodiment of the present invention is similar to the operating method of the camshaft phaser according to the first embodiment of the present invention. Only in the working method of the camshaft phaser according to the third embodiment of the present invention, the first phase modulating oil cavity portion C31 and the first small cavity portion C11 are simultaneously connected to the oil inlet passage or simultaneously communicated with the oil discharge passage. The second phase modulating oil cavity portion C32 and the second small cavity portion C21 are in communication with the oil inlet channel or with the oil discharge channel at the same time.
  • the camshaft phaser according to the third embodiment of the present invention can not only reduce or even eliminate the excessive response speed of the camshaft phaser according to the first embodiment of the present invention.
  • the possible overshoot problem can also limit the rotation range of the rotor 2 relative to the stator 1.
  • the one-way stop mechanism 3 of the camshaft phaser according to the third embodiment of the present invention can produce the same force as in the first embodiment of the present invention.
  • the different stopping forces of the one-way stop mechanism 3 of the camshaft phaser according to the second embodiment of the present invention and the one-way stop mechanism 3 of the camshaft phaser according to the second embodiment of the present invention provide more flexible structural choices.
  • first stop oil chambers C1 and the number of second stop oil chambers C2 are not limited to the numbers described in the above specific embodiments, but can be Set any number as needed.
  • the number of the first stop oil chamber C1 and the number of the second stop oil chamber C2 are both multiple, it is preferable that the first stop oil chamber C1 and the second stop oil chamber C2 alternately in the circumferential direction CR Evenly distributed.
  • each one-way stop mechanism 3 can play a one-way stop function only at the position where the cylindrical roller 31 abuts the stator 1 and the rotor 2, and the position of the cylindrical roller 31 is determined by The oil pressure of the oil in the small cavity parts C11 and C21 of the stop oil chambers C1 and C2, the elastic force of the elastic member 32, the friction force of the cylindrical roller 31 and the stator 1 / rotor 2 and the inertia of the cylindrical roller 31 itself Power to decide.
  • the cylindrical roller 31 can be made hollow.
  • the PMW signal provided by the engine control unit can control the oil pressure of the oil flowing into the small cavity parts C11, C21 of the corresponding stop oil chambers C1, C2, so that When all the above-mentioned forces received by the cylindrical roller 31 of the corresponding one-way stop mechanism 3 in the stop oil chambers C1 and C2 reach a balance, the stop function is only partially released. In this way, it is beneficial to reduce or even eliminate the undesired overshoot phenomenon.
  • both the oil inlet channel and the oil discharge channel of the present invention can be controlled by, for example, a central oil control valve or an external oil control valve to achieve communication with different channels or Not connected.
  • the first large cavity portion C12 of the first stop oil cavity C1 and the second large cavity portion C22 of the second stop oil cavity C2 can both be in communication with the atmosphere . In this way, it is only necessary to control the oil intake/discharge of the first small cavity portion C11 of the first stop oil chamber C1 and the second small cavity portion C21 of the second stop oil chamber C2, and the camshaft phaser can be controlled to achieve the desired The phase modulation function.
  • the one-dot chain line on the outside of the camshaft phaser in FIGS. 1 to 3 represents the joint part of the camshaft phaser for engaging with, for example, a belt or a chain. .

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

Provided is a camshaft phaser. Two stop oil cavities (C1, C2) are formed between a rotor (2) and a stator (1) of the camshaft phaser, and a one-way stop mechanism (3) is arranged in each stop oil cavity (C1, C2), wherein the one-way stop mechanism (3) in the first stop oil cavity (C1) can achieve a stop action for preventing the rotor (2) from rotating towards one side of a circumferential direction (CR) relative to the stator (1) and can release/restore the stop action in a controlled manner, and the one-way stop mechanism (3) in the second stop oil cavity (C2) can achieve a stop action for preventing the rotor (2) from rotating towards the other side of the circumferential direction (CR) relative to the stator (1) and can release/restore the stop action in a controlled manner; and when it is necessary for the rotor (2) to modulate a phase towards one side of the circumferential direction (CR) or the other side of the circumferential direction (CR) relative to the stator (1), desired phase modulation can be achieved merely by using the torque of a camshaft after the stop action of a corresponding one-way stop mechanism (3) is released. The camshaft phaser has a simple structure and is low cost, and has a high phase modulation speed. Further provided is an operation method for the camshaft phaser.

Description

凸轮轴相位器及其工作方法Camshaft phaser and its working method 技术领域Technical field
本发明涉及凸轮轴相位器及该凸轮轴相位器的工作方法。The invention relates to a camshaft phaser and a working method of the camshaft phaser.
背景技术Background technique
可变气门正时***是保证发动机性能的重要组成部分，其能够根据需要调节发动机的气门的开闭时间，从而使得发动机获得期望的动力输出、燃油消耗及排放。可变气门正时***包括用于调整发动机气门开闭相位的凸轮轴相位器。The variable valve timing system is an important part of ensuring the performance of the engine. It can adjust the opening and closing time of the engine's valves according to the needs, so that the engine can obtain the desired power output, fuel consumption and emissions. The variable valve timing system includes a camshaft phaser for adjusting the opening and closing phases of the engine valves.
在现有技术中，存在各种类型的凸轮轴相位器，例如仅利用油压实现调相的凸轮轴相位器、利用电机实现调相的凸轮轴相位器和利用凸轮轴的扭矩经由离合机构实现调相的凸轮轴相位器。但是，在这些现有技术的凸轮轴相位器中存在如下的问题。In the prior art, there are various types of camshaft phasers, such as a camshaft phaser that only uses hydraulic pressure to achieve phase adjustment, a camshaft phaser that uses a motor to achieve phase adjustment, and a camshaft that uses the torque of a camshaft to achieve a clutch mechanism. Camshaft phaser for phase modulation. However, these prior art camshaft phasers have the following problems.
1.在仅利用油压实现调相的凸轮轴相位器中，凸轮轴相位器的响应速度不够高，因此不能满足调相速度要求较高的场合。1. In the camshaft phaser that only uses oil pressure to achieve phase modulation, the response speed of the camshaft phaser is not high enough, so it cannot meet the occasions with high requirements for phase modulation speed.
2.虽然利用电机实现调相的凸轮轴相位器和利用凸轮轴的扭矩经由离合机构实现调相的凸轮轴相位器均具有较好的响应速度，但是这些凸轮轴相位器具有非常复杂的结构和非常高昂的成本。2. Although the camshaft phaser that uses the motor to achieve phase modulation and the camshaft phaser that uses the torque of the camshaft to achieve phase modulation via the clutch mechanism both have better response speeds, these camshaft phasers have very complex structures and Very high cost.
发明内容Summary of the invention
基于上述现有技术的缺陷而做出了本发明。本发明的目的在于提供一种新型的凸轮轴相位器，其在具有结构简单且成本较低的特性同时具有较高的调相速度。本发明的另一个发明目的在于提供一种上述凸轮轴相位器的工作方法。The present invention has been made based on the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide a new type of camshaft phaser, which has the characteristics of simple structure and low cost and high phase modulation speed. Another objective of the present invention is to provide a working method of the aforementioned camshaft phaser.
为了实现上述发明目的，本发明采用如下的技术方案。In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions.
本发明提供了一种如下的凸轮轴相位器，其具有轴向、径向和周向，并且所述凸轮轴相位器包括组装在一起的定子和转子，The present invention provides a camshaft phaser as follows, which has an axial direction, a radial direction and a circumferential direction, and the camshaft phaser includes a stator and a rotor assembled together,
所述转子设置于所述定子的径向内侧并且能够相对于所述定子转动，所述转子形成有从其外周面朝向径向内侧凹陷且彼此间隔开的多个凹部，各所述凹部与所述定子的内周面形成止动油腔，The rotor is disposed on the radially inner side of the stator and is rotatable relative to the stator. The rotor is formed with a plurality of recesses that are recessed from its outer peripheral surface toward the radially inner side and are spaced apart from each other. The inner peripheral surface of the stator forms a stop oil cavity,
所述凸轮轴相位器还包括设置于各所述止动油腔内的单向止动机构，所述止动油腔中的第一止动油腔内的所述单向止动机构能够起到阻止所述转子相对于所述定子朝向周向一侧转动的止动作用并能够受控地解除/恢复该止动作用，并且所述止动油腔中的第二止动油腔内的所述单向止动机构能够起到阻止所述转子相对于所述定子朝向周向另一侧转动的止动作用并能够受控地解除/恢复该止动作用。The camshaft phaser also includes a one-way stop mechanism disposed in each of the stop oil chambers, and the one-way stop mechanism in the first stop oil chamber of the stop oil chamber can play To prevent the rotor from rotating toward the circumferential side with respect to the stator, the stopping function can be released/recovered in a controlled manner, and the second stop oil chamber in the stop oil chamber The one-way stop mechanism can play a stop function of preventing the rotor from rotating toward the other side in the circumferential direction relative to the stator, and can release/restore the stop function in a controlled manner.
优选地，所述单向止动机构包括圆柱滚子和弹性件，Preferably, the one-way stop mechanism includes a cylindrical roller and an elastic member,
所述圆柱滚子收纳于所述止动油腔，各所述圆柱滚子将对应的所述止动油腔分隔成彼此独立的小腔部分和大腔部分，所述第一止动油腔的小腔部分和所述第二止动油腔的小腔部分分别通过不同的通道受控地与进油通道或排油通道连通，并且The cylindrical roller is accommodated in the stop oil cavity, each of the cylindrical rollers separates the corresponding stop oil cavity into a small cavity part and a large cavity part that are independent of each other, the first stop oil cavity The small cavity portion of the second stop oil cavity and the small cavity portion of the second stop oil cavity are in controlled communication with the oil inlet channel or the oil discharge channel through different channels, and
所述弹性件对所述圆柱滚子施加朝向所述小腔部分的弹性力，使得在无油压作用于所述圆柱滚子的情况下所述圆柱滚子能够抵接于所述定子和所述转子，从而实现所述止动作用。The elastic member applies an elastic force to the cylindrical roller toward the small cavity portion, so that the cylindrical roller can abut against the stator and the cylindrical roller without oil pressure acting on the cylindrical roller. The rotor, so as to achieve the stop function.
更优选地，所述第一止动油腔在所述径向上的尺寸朝向所述周向一侧逐渐增大，在所述第一止动油腔中所述小腔部分位于所述大腔部分的周向另一侧，并且More preferably, the size of the first stop oil cavity in the radial direction gradually increases toward one side in the circumferential direction, and the small cavity part is located in the large cavity in the first stop oil cavity. Part of the circumference to the other side, and
所述第二止动油腔在所述径向上的尺寸朝向所述周向另一侧逐渐增大，在所述第二止动油腔中所述小腔部分位于所述大腔部分的周向一侧。The size of the second stop oil cavity in the radial direction gradually increases toward the other side of the circumferential direction, and the small cavity part is located on the circumference of the large cavity part in the second stop oil cavity. To one side.
更优选地，所述第一止动油腔的大腔部分受控地与进油通道或排油通道连通，并且所述第二止动油腔的大腔部分受控地与进油通道或排油通道连通。More preferably, the large cavity of the first stop oil chamber is partially connected to the oil inlet passage or the oil discharge passage in a controlled manner, and the large cavity of the second stop oil cavity is partially controlled to communicate with the oil inlet passage or the oil discharge passage. The oil drain channel is connected.
更优选地，所述第一止动油腔的大腔部分和所述第二止动油腔的大腔部分均始终与大气连通。More preferably, both the large cavity portion of the first stop oil cavity and the large cavity portion of the second stop oil cavity are always in communication with the atmosphere.
更优选地，所述圆柱滚子是中空的。More preferably, the cylindrical roller is hollow.
更优选地，所述转子包括筒状的转子主体和从所述转子主体朝向径向外侧伸出的至少一个转子叶片，所述定子形成有与所述叶片对应的调相油腔，所述转子叶片位于所述调相油腔内且能够在所述调相油腔内相对于所述定子在预定范围进行转动，More preferably, the rotor includes a cylindrical rotor body and at least one rotor blade protruding radially outward from the rotor body, the stator is formed with a phase modulation oil cavity corresponding to the blade, and the rotor The blade is located in the phase modulation oil chamber and can rotate within a predetermined range relative to the stator in the phase modulation oil chamber,
所述凹部设置于所述转子主体的不与所述调相油腔重叠的部分或所述凹部设置于所述转子叶片。The recess is provided in a part of the rotor body that does not overlap with the phase modulation oil chamber or the recess is provided in the rotor blade.
更优选地，所述转子叶片将对应的所述调相油腔分隔成彼此独立的第一调相油腔部分和第二调相油腔部分，所述第一调相油腔部分和所述第二调相油腔部分通过不同的通道受控地与进油通道或排油通道连通。More preferably, the rotor blade divides the corresponding phase-modulating oil chamber into a first phase-modulating oil chamber part and a second phase-modulating oil chamber part that are independent of each other, and the first phase-modulating oil chamber part and the The second phase modulating oil chamber part is in controlled communication with the oil inlet passage or the oil discharge passage through different passages.
更优选地，所述第一止动油腔和所述第二止动油腔在所述周向上交替地均匀分布。More preferably, the first stop oil cavity and the second stop oil cavity are alternately and evenly distributed in the circumferential direction.
本发明还提供了一种以上技术方案中任意一项技术方案所述的凸轮轴相位器的工作方法，所述工作方法包括：The present invention also provides a working method of the camshaft phaser according to any one of the above technical solutions, and the working method includes:
当需要所述转子朝向所述周向一侧相对于所述定子转动调相时，所述第一止动油腔的小腔部分与进油通道连通使得向该小腔部分充油，所述第二止动油腔的小腔部分与排油通道连通使得从该小腔部分排油，从而使得所述第一止动油腔内的单向止动机构解除阻止所述转子相对于所述定子朝向周向一侧转动的止动作用，且所述第二止动油腔内的单向止动机构保持阻止所述转子相对于所述定子朝向周向另一侧转动的止动作用；When the rotor is required to rotate toward the circumferential side relative to the stator for phase modulation, the small cavity portion of the first stop oil cavity communicates with the oil inlet passage so that the small cavity portion is filled with oil, the The small cavity portion of the second stop oil chamber communicates with the oil drain passage to drain oil from the small cavity portion, so that the one-way stop mechanism in the first stop oil chamber unblocks the rotor relative to the The stator has the function of stopping rotation toward one side in the circumferential direction, and the one-way stopping mechanism in the second stopping oil chamber maintains the stopping function of preventing the rotor from rotating toward the other side of the circumferential direction relative to the stator;
当需要所述转子朝向所述周向另一侧相对于所述定子转动调相时，所述第一止动油腔的小腔部分与排油通道连通使得从该小腔部分排油，所述第二止动油腔的小腔部分与进油通道连通使得向该小腔部分充油，从而使得所述第一止动油腔内的单向止动机构保持阻止所述转子相对于所述定子朝向周向一侧转动的止动作用，且所述第二止动油腔内的单向止动机构解除阻止所述转子相对于所述定子朝向周向另一侧转动的止动作用；以及When the rotor is required to rotate toward the other side of the circumferential direction relative to the stator for phase modulation, the small cavity portion of the first stop oil cavity is in communication with the oil drain passage so that oil is drained from the small cavity portion. The small cavity portion of the second stop oil cavity is in communication with the oil inlet passage so that the small cavity portion is filled with oil, so that the one-way stop mechanism in the first stop oil cavity keeps preventing the rotor from being relative to the The stator has the function of stopping rotation toward one side in the circumferential direction, and the one-way stop mechanism in the second stop oil chamber releases the stopping function of preventing the rotor from rotating toward the other side of the circumferential direction with respect to the stator ;as well as
当需要所述转子相对于所述定子保持当前位置时，不向所述第一止动油腔的小腔部分和所述第二止动油腔的小腔部分充油，从而使得所述第一止动油腔内的单向止动机构保持阻止所述转子相对于所述定子朝向周向一侧转动的止动作用，并且所述第二止动油腔内的单向止动机构保持阻止所述转子相对于所述定子朝向周向另一侧转动的止动作用。When the rotor is required to maintain the current position relative to the stator, the small cavity portion of the first stop oil cavity and the small cavity portion of the second stop oil cavity are not filled with oil, so that the first The one-way stop mechanism in a stop oil chamber maintains the stop function of preventing the rotor from rotating toward the circumferential side relative to the stator, and the one-way stop mechanism in the second stop oil chamber maintains A stop function for preventing the rotor from rotating toward the other side in the circumferential direction relative to the stator.
通过采用上述技术方案，本发明提供了一种凸轮轴相位器及其工作方法。该凸轮轴相位器的转子与定子之间形成了两种止动油腔，在各止动油腔中均设置单向止动机构，其中第一种止动油腔内的单向止动机构能够起到阻止转子相对于定子朝向周向一侧转动的止动作用并能够受控地解除/恢复该止动作用，第二种止动油腔内的单向止动机构能够起到阻止转子相对于定子朝向周向另一侧转动的止动作用并能够受控地解除/恢复该止动作用。这样，当需要转子相对于定子朝向周向一侧或周向另一侧调相时，只要解除对应的单向止动机构的止动作用之后利用凸轮轴的扭矩就能够实现期望的调相。因此，根据本发明的凸轮轴相位器与现有技术的凸轮轴相位器相比不仅结构更简单且成本较低，而且具有较高的调相速度。By adopting the above technical solution, the present invention provides a camshaft phaser and its working method. Two kinds of stop oil chambers are formed between the rotor and the stator of the camshaft phaser, and one-way stop mechanisms are set in each stop oil chamber, and the first one is the one-way stop mechanism in the stop oil chamber It can prevent the rotor from rotating toward the circumferential side relative to the stator, and can release/restore the stop in a controlled manner. The one-way stop mechanism in the second stop oil cavity can prevent the rotor from rotating. With respect to the stop function of the stator rotating toward the other side in the circumferential direction, the stop function can be released/recovered in a controlled manner. In this way, when the rotor needs to be phase-modulated toward one side or the other side in the circumferential direction with respect to the stator, the desired phase-modulation can be achieved by using the camshaft torque after the corresponding one-way stop mechanism is released from the stopping function. Therefore, compared with the camshaft phaser of the prior art, the camshaft phaser according to the present invention not only has a simpler structure and lower cost, but also has a higher phase modulation speed.
附图说明Description of the drawings
图1是根据本发明的第一实施方式的凸轮轴相位器的剖视示意图。Fig. 1 is a schematic cross-sectional view of a camshaft phaser according to a first embodiment of the present invention.
图2是根据本发明的第二实施方式的凸轮轴相位器的剖视示意图。Fig. 2 is a schematic cross-sectional view of a camshaft phaser according to a second embodiment of the present invention.
图3是根据本发明的第三实施方式的凸轮轴相位器的剖视示意图。Fig. 3 is a schematic cross-sectional view of a camshaft phaser according to a third embodiment of the present invention.
附图标记说明Description of Reference Signs
1定子 11定子主体 12定子凸起1 Stator 11 Stator body 12 Stator protrusion
2转子 21转子主体 22转子叶片2 Rotor 21 Rotor body 22 Rotor blades
3单向止动机构 31圆柱滚子 32弹性件3 One-way stop mechanism 31 Cylindrical roller 32 Elastic part
C1第一止动油腔 C11第一小腔部分 C12第一大腔部分C1 First stop oil cavity C11 First small cavity part C12 First large cavity part
C2第二止动油腔 C21第二小腔部分 C22第二大腔部分C2 Second stop oil cavity C21 Second small cavity part C22 Second large cavity part
C3调相油腔 C31第一调相油腔部分 C32第二调相油腔部分C3 phase modulation oil chamber C31 first phase modulation oil chamber part C32 second phase modulation oil chamber part
A1第一小腔通道 B1第一大腔通道 A2第二大腔通道 B2第二小腔通道 A3第一调相油腔通道 B3第二调相油腔通道A1 first small cavity channel B1 first large cavity channel A2 second large cavity channel B2 second small cavity channel A3 first phase modulation oil cavity channel B3 second phase modulation oil cavity channel
CR周向。CR circumferential.
具体实施方式detailed description
在本发明中，如无特殊说明，本发明的轴向、径向和周向分别是指凸轮轴相位器(定子和转子)的轴向、径向和周向，其中轴向为图1至图3中垂直于纸面的方向，周向一侧是指图1至图3中的逆时针方向上的下游侧，周向另一侧是指图1至图3中的顺时针方向上的下游侧。以下将首先结合说明书附图对根据本发明的凸轮轴相位器的结构和工作方法进行说明。In the present invention, unless otherwise specified, the axial, radial and circumferential directions of the present invention refer to the axial, radial and circumferential directions of the camshaft phaser (stator and rotor) respectively, where the axial direction is shown in Figures 1 to The direction perpendicular to the paper in Figure 3, one side in the circumferential direction refers to the downstream side in the counterclockwise direction in Figures 1 to 3, and the other side in the circumferential direction refers to the clockwise direction in Figures 1 to 3 The downstream side. Hereinafter, the structure and working method of the camshaft phaser according to the present invention will be described with reference to the accompanying drawings of the specification.
(根据本发明的第一实施方式的凸轮轴相位器的结构和工作方法)(Structure and working method of the camshaft phaser according to the first embodiment of the present invention)
如图1所示，根据本发明的第一实施方式的凸轮轴相位器包括组装在一起的定子1、转子2和单向止动机构3。As shown in FIG. 1, the camshaft phaser according to the first embodiment of the present invention includes a stator 1, a rotor 2 and a one-way stop mechanism 3 assembled together.
在本实施方式中，定子1包括圆筒状的定子主体11，转子2包括位于定子主体11内的圆筒状的转子主体21，转子主体21与定子主体11同轴地设置于定子1的径向内侧并且能够相对于定子主体11沿着周向CR转动。In this embodiment, the stator 1 includes a cylindrical stator main body 11, and the rotor 2 includes a cylindrical rotor main body 21 located in the stator main body 11. The rotor main body 21 and the stator main body 11 are coaxially provided on the diameter of the stator 1. It is inward and can rotate relative to the stator main body 11 in the circumferential direction CR.
进一步地，转子主体21形成有从其外周面朝向径向内侧凹陷且彼此间隔 开的两个凹部。在图1中，两个凹部相对于穿过转子主体21的中心的一条直线成线对称。两个凹部与定子主体11的内周面分别形成第一止动油腔C1(图1中左侧的止动油腔)和第二止动油腔C2(图1中右侧的止动油腔)。第一止动油腔C1在径向上的尺寸朝向周向一侧逐渐增大，第二止动油腔C2在径向上的尺寸朝向周向另一侧逐渐增大。Further, the rotor main body 21 is formed with two recessed portions that are recessed toward the radially inner side from the outer peripheral surface thereof and spaced apart from each other. In FIG. 1, the two recesses are line-symmetrical with respect to a straight line passing through the center of the rotor main body 21. The two recesses and the inner peripheral surface of the stator body 11 respectively form a first stop oil chamber C1 (the stop oil chamber on the left in Figure 1) and a second stop oil chamber C2 (the stop oil on the right in Figure 1). Cavity). The size of the first stop oil chamber C1 in the radial direction gradually increases toward one side in the circumferential direction, and the size of the second stop oil chamber C2 in the radial direction gradually increases toward the other side in the circumferential direction.
在本实施方式中，单向止动机构3设置于各止动油腔C1、C2内。每个单向止动机构3均包括一个圆柱滚子31和一个弹性件32。In this embodiment, the one-way stopper mechanism 3 is provided in each stopper oil chamber C1, C2. Each one-way stop mechanism 3 includes a cylindrical roller 31 and an elastic member 32.
进一步地，圆柱滚子31以其中心轴线与转子主体21的中心轴线平行的方式收纳于对应的止动油腔C1、C2。圆柱滚子31将第一止动油腔C1分隔成彼此独立的第一小腔部分C11和第一大腔部分C12，第一小腔部分C11位于第一大腔部分C12的周向另一侧；圆柱滚子31将第二止动油腔C2分隔成彼此独立的第二小腔部分C21和第二大腔部分C22，第二小腔部分C21位于第二大腔部分C22的周向一侧。Further, the cylindrical roller 31 is housed in the corresponding stop oil chambers C1 and C2 in such a way that its central axis is parallel to the central axis of the rotor main body 21. The cylindrical roller 31 divides the first stop oil cavity C1 into a first small cavity portion C11 and a first large cavity portion C12 that are independent of each other, and the first small cavity portion C11 is located on the other side of the first large cavity portion C12 in the circumferential direction ; Cylindrical roller 31 separates the second stop oil cavity C2 into a second small cavity portion C21 and a second large cavity portion C22 that are independent of each other, the second small cavity portion C21 is located on the circumferential side of the second large cavity portion C22 .
一方面，第一小腔部分C11通过形成于转子主体21内的第一小腔通道A1能够受控地与进油通道或排油通道连通，第二大腔部分C22通过形成于转子主体21内的第二大腔通道A2能够受控地与进油通道或排油通道连通。在本实施方式中，通过第一小腔通道A1和第二大腔通道A2，第一小腔部分C11和第二大腔部分C22同时与进油通道连通或者同时与排油通道连通。优选地，第一小腔通道A1与第二大腔通道A2均沿着径向延伸并且第一小腔通道A1的径向内侧开口和第二大腔通道A2的径向内侧开口在相同的一轴向位置。On the one hand, the first small cavity portion C11 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first small cavity passage A1 formed in the rotor body 21, and the second large cavity portion C22 is formed in the rotor body 21 The second large cavity channel A2 can be controlled to communicate with the oil inlet channel or the oil discharge channel. In this embodiment, through the first small cavity channel A1 and the second large cavity channel A2, the first small cavity portion C11 and the second large cavity portion C22 are simultaneously connected with the oil inlet channel or simultaneously with the oil discharge channel. Preferably, the first small cavity channel A1 and the second large cavity channel A2 both extend in the radial direction, and the radially inner opening of the first small cavity channel A1 and the radially inner opening of the second large cavity channel A2 are at the same one. Axial position.
另一方面，第二小腔部分C21通过形成于转子主体21内的第二小腔通道B2能够受控地与进油通道或排油通道连通，第一大腔部分C12通过形成于转子主体21内的第一大腔通道B1能够受控地与进油通道或排油通道连通。在本实施方式中，通过第二小腔通道B2和第一大腔通道B1，第二小腔部分C21和第一大腔部分C12同时与进油通道连通或者同时与排油通道连通。优选地， 第二小腔通道B2和第一大腔通道B1均沿着径向延伸并且第二小腔通道B2的径向内侧开口和第一大腔通道B1的径向内侧开口在相同的另一轴向位置。On the other hand, the second small cavity portion C21 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the second small cavity passage B2 formed in the rotor main body 21, and the first large cavity portion C12 is formed in the rotor main body 21. The inner first large cavity passage B1 can be communicated with the oil inlet passage or the oil discharge passage in a controlled manner. In this embodiment, through the second small cavity channel B2 and the first large cavity channel B1, the second small cavity portion C21 and the first large cavity portion C12 are simultaneously connected with the oil inlet channel or simultaneously with the oil discharge channel. Preferably, the second small cavity channel B2 and the first large cavity channel B1 both extend in the radial direction, and the radially inner opening of the second small cavity channel B2 and the radially inner opening of the first large cavity channel B1 are at the same other. An axial position.
进一步地，弹性件32可以例如为圆柱螺旋弹簧。该弹性件32收纳于各大腔部分(第一大腔部分C12和第二大腔部分C22)，弹性件32的一端抵接于转子主体21，而另一端始终对圆柱滚子31施加朝向各小腔部分(第一小腔部分C11和第二小腔部分C21)的弹性力。而且，弹性件32的另一端与圆柱滚子31并不相对固定。Further, the elastic member 32 may be, for example, a cylindrical coil spring. The elastic member 32 is housed in each large cavity portion (the first large cavity portion C12 and the second large cavity portion C22). One end of the elastic member 32 abuts against the rotor body 21, and the other end always applies the cylindrical roller 31 toward each The elastic force of the small cavity portion (the first small cavity portion C11 and the second small cavity portion C21). Moreover, the other end of the elastic member 32 and the cylindrical roller 31 are not relatively fixed.
这样，在无油压作用于圆柱滚子31的情况下圆柱滚子31主要在弹性件32的弹性力的作用下抵接于定子1和转子2，从而各单向止动机构3实现如下的止动作用：第一止动油腔C1内的单向止动机构3能够起到阻止转子2相对于定子1朝向周向一侧转动的止动作用，并且第二止动油腔C2内的单向止动机构3能够起到阻止转子2相对于定子1朝向周向另一侧转动的止动作用。另外，通过向第一小腔部分C11填充高压油的同时从第一大腔部分C12排油能够解除第一止动油腔C1内的单向止动机构3的止动作用，通过从第一小腔部分C11排油则能够恢复该止动作用；并且通过向第二小腔部分C21填充高压油的同时排空第二大腔部分C22能够解除第二止动油腔C2内的单向止动机构3的止动作用，通过从第二小腔部分C21排油能够恢复该止动作用。In this way, when there is no oil pressure acting on the cylindrical roller 31, the cylindrical roller 31 mainly abuts against the stator 1 and the rotor 2 under the action of the elastic force of the elastic member 32, so that each one-way stopper mechanism 3 realizes the following Stop action: the one-way stop mechanism 3 in the first stop oil chamber C1 can prevent the rotor 2 from rotating toward the circumferential side with respect to the stator 1 and the stop function in the second stop oil chamber C2 The one-way stop mechanism 3 can serve as a stop function for preventing the rotor 2 from rotating toward the other side in the circumferential direction with respect to the stator 1. In addition, by filling the first small cavity portion C11 with high-pressure oil while draining the oil from the first large cavity portion C12, the stop function of the one-way stop mechanism 3 in the first stop oil chamber C1 can be cancelled. Draining the oil from the small cavity portion C11 can restore the stopping effect; and by filling the second small cavity portion C21 with high-pressure oil while draining the second large cavity portion C22, the one-way stop in the second stop oil cavity C2 can be released. The stopping function of the moving mechanism 3 can be restored by draining oil from the second small cavity portion C21.
以上说明了根据本发明的第一实施方式的凸轮轴相位器的结构，以下说明根据本发明的第一实施方式的凸轮轴相位器的工作方法。The structure of the camshaft phaser according to the first embodiment of the present invention has been described above, and the operation method of the camshaft phaser according to the first embodiment of the present invention will be described below.
如图1所示，当需要转子2朝向周向一侧相对于定子1转动调相时，一方面，第一小腔部分C11通过第一小腔通道A1与进油通道连通使得向该第一小腔部分C11充油，同时第二大腔部分C22通过第二大腔通道A2与进油通道连通使得向该第二大腔部分C22充油；另一方面，第二小腔部分C21通过第二小腔通道B2与排油通道连通使得从该第二小腔部分C21排油，同时第一大腔部分C12通过第一大腔通道B1与排油通道连通使得从第一大腔部分C12排 油。这样，在第一小腔部分C11中的油的油压的作用下，第一止动油腔C1内的单向止动机构3的圆柱滚子31至少部分地解除阻止转子2相对于定子1朝向周向一侧转动的止动作用，且在第二大腔部分C22中的油的油压和弹性件32的弹性力的作用下，第二止动油腔C2内的单向止动机构3保持阻止转子2相对于定子1朝向周向另一侧转动的止动作用，进一步地利用凸轮轴的扭矩实现转子2相对于定子1朝向周向一侧转动调相。As shown in Figure 1, when the rotor 2 is required to rotate towards the circumferential side relative to the stator 1 for phase modulation, on the one hand, the first small cavity portion C11 communicates with the oil inlet passage through the first small cavity passage A1 so that the The small cavity portion C11 is filled with oil, while the second large cavity portion C22 communicates with the oil inlet passage through the second large cavity passage A2 so that the second large cavity portion C22 is filled with oil; on the other hand, the second small cavity portion C21 passes through the first The two small cavity passages B2 communicate with the oil drain passage to drain oil from the second small cavity portion C21, while the first large cavity portion C12 communicates with the oil drain passage through the first large cavity passage B1 so as to drain from the first large cavity portion C12 Oil. In this way, under the action of the oil pressure of the oil in the first small cavity portion C11, the cylindrical roller 31 of the one-way stop mechanism 3 in the first stop oil chamber C1 at least partially unblocks the rotor 2 from relative to the stator 1. The one-way stop mechanism in the second stop oil chamber C2 is used to stop the rotation on the side toward the circumferential direction, and under the action of the oil pressure of the oil in the second large cavity portion C22 and the elastic force of the elastic member 32 3 Maintain the stop function that prevents the rotor 2 from rotating toward the other side in the circumferential direction relative to the stator 1, and further utilize the torque of the camshaft to realize the phase modulation of the rotor 2 relative to the stator 1 in the circumferential direction.
当需要转子2朝向周向另一侧相对于定子1转动调相时，一方面，第一小腔部分C11通过第一小腔通道A1与排油通道连通使得从该第一小腔部分C11排油，同时第二大腔部分C22通过第二大腔通道A2与排油通道连通使得从该第二大腔部分C22排油；另一方面，第二小腔部分C21通过第二小腔通道B2与进油通道连通使得向该第二小腔部分C21充油，同时第一大腔部分C12通过第一大腔通道B1与进油通道连通使得第一大腔部分C12充油。这样，在第二小腔部分C21中的油的油压的作用下，第二止动油腔C2内的单向止动机构3的圆柱滚子31至少部分地解除阻止转子2相对于定子1朝向周向另一侧转动的止动作用，且在第一大腔部分C12中的油的油压和弹性件32的弹性力的作用下，第一止动油腔C1内的单向止动机构3保持阻止转子2相对于定子1朝向周向一侧转动的止动作用，进一步地利用凸轮轴的扭矩实现转子2相对于定子1朝向周向另一侧转动调相。When the rotor 2 is required to rotate relative to the stator 1 toward the other side in the circumferential direction and phase modulation, on the one hand, the first small cavity portion C11 communicates with the oil discharge passage through the first small cavity passage A1 so that the first small cavity portion C11 is discharged At the same time, the second large cavity portion C22 communicates with the oil discharge passage through the second large cavity passage A2 so that oil is drained from the second large cavity portion C22; on the other hand, the second small cavity portion C21 passes through the second small cavity passage B2 Connecting with the oil inlet passage makes the second small cavity part C21 filled with oil, while the first large cavity part C12 communicates with the oil inlet passage through the first large cavity passage B1 so that the first large cavity part C12 is filled with oil. In this way, under the action of the oil pressure of the oil in the second small cavity portion C21, the cylindrical roller 31 of the one-way stop mechanism 3 in the second stop oil chamber C2 at least partially unblocks the rotor 2 from relative to the stator 1. To stop the rotation toward the other side of the circumferential direction, and under the action of the oil pressure of the oil in the first large cavity portion C12 and the elastic force of the elastic member 32, the one-way stop in the first stop oil cavity C1 The mechanism 3 maintains the stop function of preventing the rotor 2 from rotating to one side in the circumferential direction relative to the stator 1, and further uses the torque of the camshaft to realize the phase modulation of the rotor 2 relative to the stator 1 in the other side of the circumferential direction.
当需要转子2相对于定子1保持当前位置而不进行调相时，第一止动油腔C1的第一小腔部分C11通过第一小腔通道A1与排油通道连通使得从该第一小腔部分C11排油，第二止动油腔C2的第二小腔部分C21与排油通道连通使得从该第二小腔部分C21排油。在弹性件32的弹性力的作用下，使得第一止动油腔C1内的单向止动机构3的圆柱滚子31保持/恢复阻止转子2相对于定子1朝向周向一侧转动的止动作用，并且第二止动油腔C2内的单向止动机构3的圆柱滚子31保持/恢复阻止转子2相对于定子1朝向周向另一侧转动的止动 作用。这时，转子2不能相对于定子1转动。When the rotor 2 is required to maintain the current position relative to the stator 1 without phase adjustment, the first small cavity portion C11 of the first stop oil cavity C1 communicates with the oil drain passage through the first small cavity passage A1 so that the first small cavity The cavity portion C11 drains oil, and the second small cavity portion C21 of the second stop oil cavity C2 communicates with the oil drain passage so that the oil is drained from the second small cavity portion C21. Under the action of the elastic force of the elastic member 32, the cylindrical roller 31 of the one-way stop mechanism 3 in the first stop oil chamber C1 is held/restored to prevent the rotor 2 from rotating toward the circumferential side relative to the stator 1 The cylindrical roller 31 of the one-way stop mechanism 3 in the second stop oil chamber C2 retains/restores the stop function to prevent the rotor 2 from rotating toward the other side in the circumferential direction relative to the stator 1. At this time, the rotor 2 cannot rotate relative to the stator 1.
以上结合说明书附图说明了根据本发明的第一实施方式的凸轮轴相位器的结构和工作方法，以下将结合说明书附图说明根据本发明的第二实施方式的凸轮轴相位器的结构和工作方法。The structure and working method of the camshaft phaser according to the first embodiment of the present invention are described above in conjunction with the drawings of the specification, and the structure and operation of the camshaft phaser according to the second embodiment of the present invention will be described below in conjunction with the drawings of the specification. method.
(根据本发明的第二实施方式的凸轮轴相位器的结构和工作方法)(The structure and working method of the camshaft phaser according to the second embodiment of the present invention)
根据本发明的第二实施方式的凸轮轴相位器的基本结构与根据本发明的第一实施方式的凸轮轴相位器的基本结构大致相同，以下将仅说明两者之间的不同之处。The basic structure of the camshaft phaser according to the second embodiment of the present invention is substantially the same as the basic structure of the camshaft phaser according to the first embodiment of the present invention, and only the differences between the two will be described below.
如图2所示，转子2除了包括筒状的转子主体21之外还包括从转子主体21朝向径向外侧伸出的一个(或多个)转子叶片22，定子1的定子主体11包括与叶片对应的扇形的调相油腔C3，转子叶片22位于调相油腔C3内且能够在调相油腔C3内相对于定子1在预定范围进行转动。用于形成止动油腔C1、C2的凹部设置于转子主体21的不会与调相油腔C3重叠的部分。As shown in Figure 2, the rotor 2 in addition to the cylindrical rotor body 21 also includes one (or more) rotor blades 22 extending from the rotor body 21 toward the radially outer side. The stator body 11 of the stator 1 includes Corresponding to the sector-shaped phase-modulating oil chamber C3, the rotor blade 22 is located in the phase-modulating oil chamber C3 and can rotate within a predetermined range relative to the stator 1 in the phase-modulating oil chamber C3. The recesses for forming the stopper oil chambers C1 and C2 are provided in the portion of the rotor main body 21 that does not overlap with the phase adjusting oil chamber C3.
进一步地，转子叶片22将对应的调相油腔C3分隔成彼此独立的第一调相油腔部分C31和第二调相油腔部分C32，第一调相油腔部分C31位于第二调相油腔部分C32的周向另一侧。第一调相油腔部分C31通过形成于转子主体21内的第一调相油腔通道A3能够受控地与进油通道或排油通道连通，第二调相油腔部分C32通过形成于转子主体21内的第二调相油腔通道B3能够受控地与进油通道或排油通道连通。而且，通过第一调相油腔通道A3和第一小腔通道A1，第一调相油腔部分C31和第一小腔部分C11同时与进油通道连通或者同时与排油通道连通；通过第二调相油腔通道B3和第二小腔通道B2，第二调相油腔部分C32和第二小腔部分C21同时与进油通道连通或者同时与排油通道连通。Further, the rotor blade 22 divides the corresponding phase modulation oil chamber C3 into a first phase modulation oil chamber part C31 and a second phase modulation oil chamber part C32 that are independent of each other, and the first phase modulation oil chamber part C31 is located in the second phase modulation oil chamber part C32. The other side of the circumferential direction of the oil cavity portion C32. The first phase adjustment oil chamber portion C31 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first phase adjustment oil chamber passage A3 formed in the rotor main body 21, and the second phase adjustment oil chamber portion C32 is formed in the rotor The second phase modulation oil chamber passage B3 in the main body 21 can be controlled to communicate with the oil inlet passage or the oil discharge passage. Moreover, through the first phase modulating oil chamber channel A3 and the first small cavity channel A1, the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are in communication with the oil inlet channel or with the oil discharge channel at the same time; The second phase modulating oil cavity channel B3 and the second small cavity channel B2, the second phase modulating oil cavity portion C32 and the second small cavity portion C21 are connected to the oil inlet channel or simultaneously to the oil discharge channel.
根据本发明的第二实施方式的凸轮轴相位器的工作方法与根据本发明的第一实施方式的凸轮轴相位器的工作方法类似。只是在根据本发明的第二 实施方式的凸轮轴相位器的工作方法中，第一调相油腔部分C31和第一小腔部分C11同时与进油通道连通或者同时与排油通道连通，第二调相油腔部分C32和第二小腔部分C21同时与进油通道连通或者同时与排油通道连通。The operating method of the camshaft phaser according to the second embodiment of the present invention is similar to the operating method of the camshaft phaser according to the first embodiment of the present invention. Only in the working method of the camshaft phaser according to the second embodiment of the present invention, the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are simultaneously connected to the oil inlet passage or simultaneously communicated with the oil discharge passage. The second phase modulating oil cavity portion C32 and the second small cavity portion C21 are in communication with the oil inlet channel or with the oil discharge channel at the same time.
这样，通过设置转子叶片22和调相油腔C3，根据本发明的第二实施方式的凸轮轴相位器不仅能够减轻甚至消除根据本发明第一实施方式中的凸轮轴相位器由于响应速度过快而可能产生的超调问题，而且能够对转子2相对于定子1的转动范围进行限定。In this way, by providing the rotor blade 22 and the phase modulation oil chamber C3, the camshaft phaser according to the second embodiment of the present invention can not only reduce or even eliminate the excessive response speed of the camshaft phaser according to the first embodiment of the present invention. The possible overshoot problem can also limit the rotation range of the rotor 2 relative to the stator 1.
以上结合说明书附图说明了根据本发明的第二实施方式的凸轮轴相位器的结构和工作方法，以下将结合说明书附图说明根据本发明的第三实施方式的凸轮轴相位器的结构和工作方法。The structure and working method of the camshaft phaser according to the second embodiment of the present invention are described above in conjunction with the drawings of the specification, and the structure and operation of the camshaft phaser according to the third embodiment of the present invention will be described below in conjunction with the drawings of the specification. method.
(根据本发明的第三实施方式的凸轮轴相位器的结构和工作方法)(Structure and working method of the camshaft phaser according to the third embodiment of the present invention)
根据本发明的第三实施方式的凸轮轴相位器的基本结构与根据本发明的第一实施方式的凸轮轴相位器的基本结构大致相同，以下将仅说明两者之间的不同之处。The basic structure of the camshaft phaser according to the third embodiment of the present invention is substantially the same as the basic structure of the camshaft phaser according to the first embodiment of the present invention, and only the differences between the two will be described below.
如图3所示，转子2除了包括筒状的转子主体21之外还包括从转子主体21朝向径向外侧伸出的两个(或更多个)转子叶片22，定子1除了包括筒状的定子主体11之外还包括从定子主体11朝向径向内侧伸出的两个(或更多个)定子凸起12。在两个定子凸起12之间形成有与转子叶片22对应的两个扇形的调相油腔C3，各转子叶片22位于对应的调相油腔C3内且能够在调相油腔C3内相对于定子1在预定范围进行转动。在本实施方式中，用于形成止动油腔C1、C2的凹部设置于转子叶片22的外周面。因此，第一小腔通道A1、第一大腔通道B1、第二小腔通道B2和第二大腔通道A2的一部分位于转子主体21内，而另一部分位于转子叶片22内。As shown in FIG. 3, in addition to the cylindrical rotor body 21, the rotor 2 also includes two (or more) rotor blades 22 extending from the rotor body 21 toward the radially outer side. The stator 1 includes a cylindrical rotor body 21. The stator main body 11 also includes two (or more) stator protrusions 12 protruding from the stator main body 11 toward the radially inner side. Two sector-shaped phase modulation oil chambers C3 corresponding to the rotor blades 22 are formed between the two stator protrusions 12, and each rotor blade 22 is located in the corresponding phase modulation oil chamber C3 and can be opposed to each other in the phase modulation oil chamber C3 The stator 1 rotates in a predetermined range. In this embodiment, the recesses for forming the stopper oil chambers C1 and C2 are provided on the outer peripheral surface of the rotor blade 22. Therefore, a part of the first small cavity channel A1, the first large cavity channel B1, the second small cavity channel B2, and the second large cavity channel A2 are located in the rotor body 21, and the other part is located in the rotor blade 22.
进一步地，转子叶片22将对应的调相油腔C3分隔成彼此独立的第一调相油腔部分C31和第二调相油腔部分C32，第一调相油腔部分C31位于第二调相 油腔部分C32的周向另一侧。第一调相油腔部分C31通过形成于转子主体21内的第一调相油腔通道A3能够受控地与进油通道或排油通道连通，第二调相油腔部分C32通过形成于转子主体21内的第二调相油腔通道B3能够受控地与进油通道或排油通道连通。而且，通过第一调相油腔通道A3和第一小腔通道A1，第一调相油腔部分C31和第一小腔部分C11同时与进油通道连通或者同时与排油通道连通；通过第二调相油腔通道B3和第二小腔通道B2，第二调相油腔部分C32和第二小腔部分C21同时与进油通道连通或者同时与排油通道连通。Further, the rotor blade 22 divides the corresponding phase modulation oil chamber C3 into a first phase modulation oil chamber part C31 and a second phase modulation oil chamber part C32 that are independent of each other, and the first phase modulation oil chamber part C31 is located in the second phase modulation oil chamber part C32. The other side of the circumferential direction of the oil cavity portion C32. The first phase adjustment oil chamber portion C31 can be controlled to communicate with the oil inlet passage or the oil discharge passage through the first phase adjustment oil chamber passage A3 formed in the rotor main body 21, and the second phase adjustment oil chamber portion C32 is formed in the rotor The second phase modulation oil chamber passage B3 in the main body 21 can be controlled to communicate with the oil inlet passage or the oil discharge passage. Moreover, through the first phase modulating oil chamber channel A3 and the first small cavity channel A1, the first phase modulating oil chamber portion C31 and the first small cavity portion C11 are in communication with the oil inlet channel or with the oil discharge channel at the same time; The second phase modulating oil cavity channel B3 and the second small cavity channel B2, the second phase modulating oil cavity portion C32 and the second small cavity portion C21 are connected to the oil inlet channel or simultaneously to the oil discharge channel.
根据本发明的第三实施方式的凸轮轴相位器的工作方法与根据本发明的第一实施方式的凸轮轴相位器的工作方法类似。只是在根据本发明的第三实施方式的凸轮轴相位器的工作方法中，第一调相油腔部分C31和第一小腔部分C11同时与进油通道连通或者同时与排油通道连通，第二调相油腔部分C32和第二小腔部分C21同时与进油通道连通或者同时与排油通道连通。The operating method of the camshaft phaser according to the third embodiment of the present invention is similar to the operating method of the camshaft phaser according to the first embodiment of the present invention. Only in the working method of the camshaft phaser according to the third embodiment of the present invention, the first phase modulating oil cavity portion C31 and the first small cavity portion C11 are simultaneously connected to the oil inlet passage or simultaneously communicated with the oil discharge passage. The second phase modulating oil cavity portion C32 and the second small cavity portion C21 are in communication with the oil inlet channel or with the oil discharge channel at the same time.
这样，通过设置转子叶片22和调相油腔C3，根据本发明的第三实施方式的凸轮轴相位器不仅能够减轻甚至消除根据本发明第一实施方式中的凸轮轴相位器由于响应速度过快而可能产生的超调问题，而且能够对转子2相对于定子1的转动范围进行限定。另外，由于单向止动机构3的圆柱滚子31受到的力的力臂不同，根据本发明第三实施方式的凸轮轴相位器的单向止动机构3能够产生与根据本发明第一实施方式的凸轮轴相位器的单向止动机构3和根据本发明第二实施方式的凸轮轴相位器的单向止动机构3不同的止动力，提供了更灵活的结构选择。In this way, by providing the rotor blades 22 and the phase modulation oil chamber C3, the camshaft phaser according to the third embodiment of the present invention can not only reduce or even eliminate the excessive response speed of the camshaft phaser according to the first embodiment of the present invention. The possible overshoot problem can also limit the rotation range of the rotor 2 relative to the stator 1. In addition, since the force arm of the force received by the cylindrical roller 31 of the one-way stop mechanism 3 is different, the one-way stop mechanism 3 of the camshaft phaser according to the third embodiment of the present invention can produce the same force as in the first embodiment of the present invention. The different stopping forces of the one-way stop mechanism 3 of the camshaft phaser according to the second embodiment of the present invention and the one-way stop mechanism 3 of the camshaft phaser according to the second embodiment of the present invention provide more flexible structural choices.
以上已经对本发明的具体实施方式进行了详细地阐述，另外进行如下的补充说明。The specific embodiments of the present invention have been described in detail above, and the following supplementary descriptions are additionally provided.
i.虽然在以上的具体实施方式中没有明确说明，但是应当理解第一止动油腔C1的数量和第二止动油腔C2的数量不限于上述具体实施方式中说明的 数量，而是可以根据需要设置任意数量。当第一止动油腔C1的数量和第二止动油腔C2的数量均为多个时，优选地第一止动油腔C1和第二止动油腔C2在周向CR上交替地均匀分布。i. Although there is no clear description in the above specific embodiments, it should be understood that the number of first stop oil chambers C1 and the number of second stop oil chambers C2 are not limited to the numbers described in the above specific embodiments, but can be Set any number as needed. When the number of the first stop oil chamber C1 and the number of the second stop oil chamber C2 are both multiple, it is preferable that the first stop oil chamber C1 and the second stop oil chamber C2 alternately in the circumferential direction CR Evenly distributed.
ii.在本发明中，各单向止动机构3只有在其圆柱滚子31与定子1和转子2均抵接的位置处才能起到单向止动作用，而圆柱滚子31的位置由各止动油腔C1、C2的小腔部分C11、C21内的油的油压、弹性件32的弹性力、圆柱滚子31与定子1/转子2的摩擦力以及圆柱滚子31自身的惯性力来决定。当需要降低圆柱滚子31的惯性力时，可以使得圆柱滚子31是中空的。ii. In the present invention, each one-way stop mechanism 3 can play a one-way stop function only at the position where the cylindrical roller 31 abuts the stator 1 and the rotor 2, and the position of the cylindrical roller 31 is determined by The oil pressure of the oil in the small cavity parts C11 and C21 of the stop oil chambers C1 and C2, the elastic force of the elastic member 32, the friction force of the cylindrical roller 31 and the stator 1 / rotor 2 and the inertia of the cylindrical roller 31 itself Power to decide. When it is necessary to reduce the inertial force of the cylindrical roller 31, the cylindrical roller 31 can be made hollow.
这样，由于根据本发明的凸轮轴相位器的响应速度快，可以通过发动机控制单元提供的PMW信号控制流入对应的止动油腔C1、C2的小腔部分C11、C21的油的油压，使得当该止动油腔C1、C2内的对应的单向止动机构3的圆柱滚子31所受到的上述所有力达到平衡时仅部分地解除其止动作用。这样，有利于减轻甚至消除不期望的超调现象。In this way, because the camshaft phaser according to the present invention has a fast response speed, the PMW signal provided by the engine control unit can control the oil pressure of the oil flowing into the small cavity parts C11, C21 of the corresponding stop oil chambers C1, C2, so that When all the above-mentioned forces received by the cylindrical roller 31 of the corresponding one-way stop mechanism 3 in the stop oil chambers C1 and C2 reach a balance, the stop function is only partially released. In this way, it is beneficial to reduce or even eliminate the undesired overshoot phenomenon.
iii.虽然在以上的具体实施方式中没有明确说明，但是应当理解本发明的进油通道和排油通道均可以由例如中央油控阀或外置式油控阀控制以实现与不同的通道连通或不连通。iii. Although there is no clear description in the above specific embodiments, it should be understood that both the oil inlet channel and the oil discharge channel of the present invention can be controlled by, for example, a central oil control valve or an external oil control valve to achieve communication with different channels or Not connected.
iv.虽然在以上的具体实施方式中没有明确说明，但是可以使第一止动油腔C1的第一大腔部分C12和第二止动油腔C2的第二大腔部分C22均与大气连通。这样，仅需要控制第一止动油腔C1的第一小腔部分C11和第二止动油腔C2的第二小腔部分C21的进油/排油，就能够控制凸轮轴相位器实现期望的调相功能。iv. Although there is no clear description in the above specific embodiments, the first large cavity portion C12 of the first stop oil cavity C1 and the second large cavity portion C22 of the second stop oil cavity C2 can both be in communication with the atmosphere . In this way, it is only necessary to control the oil intake/discharge of the first small cavity portion C11 of the first stop oil chamber C1 and the second small cavity portion C21 of the second stop oil chamber C2, and the camshaft phaser can be controlled to achieve the desired The phase modulation function.
v.虽然在以上的具体实施方式中没有说明，但是应当理解图1至图3中的凸轮轴相位器的外侧的单点划线表示凸轮轴相位器用于与例如皮带或链条等接合的接合部。v. Although not described in the above specific embodiments, it should be understood that the one-dot chain line on the outside of the camshaft phaser in FIGS. 1 to 3 represents the joint part of the camshaft phaser for engaging with, for example, a belt or a chain. .

Claims (10)

  1. 一种凸轮轴相位器，其具有轴向、径向和周向(CR)，并且所述凸轮轴相位器包括组装在一起的定子(1)和转子(2)，A camshaft phaser has an axial direction, a radial direction and a circumferential direction (CR), and the camshaft phaser includes a stator (1) and a rotor (2) assembled together,
    所述转子(2)设置于所述定子(1)的径向内侧并且能够相对于所述定子(1)转动，所述转子(2)形成有从其外周面朝向径向内侧凹陷且彼此间隔开的多个凹部，各所述凹部与所述定子(1)的内周面形成止动油腔(C1、C2)，The rotor (2) is arranged on the radially inner side of the stator (1) and is capable of rotating relative to the stator (1), and the rotor (2) is formed to be recessed from its outer peripheral surface toward the radially inner side and spaced apart from each other Open a plurality of recesses, each of which forms a stop oil cavity (C1, C2) with the inner peripheral surface of the stator (1),
    所述凸轮轴相位器还包括设置于各所述止动油腔(C1、C2)内的单向止动机构(3)，所述止动油腔(C1、C2)中的第一止动油腔(C1)内的所述单向止动机构(3)能够起到阻止所述转子(2)相对于所述定子(1)朝向周向一侧转动的止动作用并能够受控地解除/恢复该止动作用，并且所述止动油腔(C1、C2)中的第二止动油腔(C2)内的所述单向止动机构(3)能够起到阻止所述转子(2)相对于所述定子(1)朝向周向另一侧转动的止动作用并能够受控地解除/恢复该止动作用。The camshaft phaser also includes a one-way stop mechanism (3) arranged in each of the stop oil chambers (C1, C2), and the first stop in the stop oil chamber (C1, C2) The one-way stop mechanism (3) in the oil chamber (C1) can prevent the rotor (2) from rotating toward the circumferential side relative to the stator (1) and can be controlled in a controlled manner. The stop function is released/recovered, and the one-way stop mechanism (3) in the second stop oil chamber (C2) of the stop oil chambers (C1, C2) can prevent the rotor (2) With respect to the stop function of the stator (1) rotating toward the other side in the circumferential direction, the stop function can be released/recovered in a controlled manner.
  2. 根据权利要求1所述的凸轮轴相位器，其特征在于，所述单向止动机构(3)包括圆柱滚子(31)和弹性件(32)，The camshaft phaser according to claim 1, wherein the one-way stop mechanism (3) comprises a cylindrical roller (31) and an elastic member (32),
    所述圆柱滚子(31)收纳于所述止动油腔(C1、C2)，各所述圆柱滚子(31)将对应的所述止动油腔(C1、C2)分隔成彼此独立的小腔部分(C11、C21)和大腔部分(C12、C22)，所述第一止动油腔(C1)的小腔部分(C11)和所述第二止动油腔(C2)的小腔部分(C21)分别通过不同的通道(A1、B2)受控地与进油通道或排油通道连通，并且The cylindrical rollers (31) are accommodated in the detent oil chambers (C1, C2), and each of the cylindrical rollers (31) separates the corresponding detent oil chambers (C1, C2) into independent The small cavity portion (C11, C21) and the large cavity portion (C12, C22), the small cavity portion (C11) of the first detent oil cavity (C1) and the small cavity portion (C11) of the second detent oil cavity (C2) The cavity part (C21) is in controlled communication with the oil inlet passage or the oil discharge passage through different passages (A1, B2), and
    所述弹性件(32)对所述圆柱滚子(31)施加朝向所述小腔部分(C11、C21)的弹性力，使得在无油压作用于所述圆柱滚子(31)的情况下所述圆柱滚子(31)能够抵接于所述定子(1)和所述转子(2)，从而实现所述止动作用。The elastic member (32) exerts an elastic force on the cylindrical roller (31) toward the small cavity portion (C11, C21), so that when no oil pressure acts on the cylindrical roller (31) The cylindrical roller (31) can abut against the stator (1) and the rotor (2), so as to achieve the stopping effect.
  3. 根据权利要求2所述的凸轮轴相位器，其特征在于，The camshaft phaser according to claim 2, wherein:
    所述第一止动油腔(C1)在所述径向上的尺寸朝向所述周向一侧逐渐增大，在所述第一止动油腔(C1)中所述小腔部分(C11)位于所述大腔部分(C12)的周向另一侧，并且The size of the first stop oil chamber (C1) in the radial direction gradually increases toward the circumferential side, and the small cavity portion (C11) in the first stop oil chamber (C1) Located on the other side of the large cavity part (C12) in the circumferential direction, and
    所述第二止动油腔(C2)在所述径向上的尺寸朝向所述周向另一侧逐渐增大，在所述第二止动油腔(C2)中所述小腔部分(C21)位于所述大腔部分(C22)的周向一侧。The size of the second stop oil chamber (C2) in the radial direction gradually increases toward the other side of the circumferential direction, and the small cavity portion (C21) in the second stop oil chamber (C2) ) Is located on the circumferential side of the large cavity portion (C22).
  4. 根据权利要求2或3所述的凸轮轴相位器，其特征在于，所述第一止动油腔(C1)的大腔部分(C12)受控地与进油通道或排油通道连通，并且所述第二止动油腔(C2)的大腔部分(C22)受控地与进油通道或排油通道连通。The camshaft phaser according to claim 2 or 3, wherein the large cavity portion (C12) of the first stop oil cavity (C1) is in controlled communication with the oil inlet passage or the oil discharge passage, and The large cavity portion (C22) of the second stop oil cavity (C2) is in controlled communication with the oil inlet passage or the oil discharge passage.
  5. 根据权利要求2或3所述的凸轮轴相位器，其特征在于，所述第一止动油腔(C1)的大腔部分(C12)和所述第二止动油腔(C2)的大腔部分(C22)均始终与大气连通。The camshaft phaser according to claim 2 or 3, wherein the large cavity portion (C12) of the first detent oil cavity (C1) and the large cavity portion (C12) of the second detent oil cavity (C2) The cavity part (C22) is always in communication with the atmosphere.
  6. 根据权利要求1至5中任一项所述的凸轮轴相位器，其特征在于，所述圆柱滚子(31)是中空的。The camshaft phaser according to any one of claims 1 to 5, wherein the cylindrical roller (31) is hollow.
  7. 根据权利要求1至6中任一项所述的凸轮轴相位器，其特征在于，所述转子(2)包括筒状的转子主体(21)和从所述转子主体(21)朝向径向外侧伸出的至少一个转子叶片(22)，所述定子(1)形成有与所述叶片对应的调相油腔(C3)，所述转子叶片(22)位于所述调相油腔(C3)内且能够在所述调相油腔(C3)内相对于所述定子(1)在预定范围进行转动，The camshaft phaser according to any one of claims 1 to 6, characterized in that, the rotor (2) comprises a cylindrical rotor body (21) and from the rotor body (21) to the radially outer side At least one extended rotor blade (22), the stator (1) is formed with a phase modulation oil cavity (C3) corresponding to the blade, and the rotor blade (22) is located in the phase modulation oil cavity (C3) And capable of rotating within a predetermined range relative to the stator (1) in the phase modulation oil chamber (C3),
    所述凹部设置于所述转子主体(21)的不与所述调相油腔(C3)重叠的部分或所述凹部设置于所述转子叶片(22)。The recess is provided in a part of the rotor main body (21) that does not overlap the phase modulation oil chamber (C3) or the recess is provided in the rotor blade (22).
  8. 根据引用权利要求2至6中任一项的权利要求7所述的凸轮轴相位器，其特征在于，所述转子叶片(22)将对应的所述调相油腔(C3)分隔成彼此独立的第一调相油腔部分(C31)和第二调相油腔部分(C32)，所述第一调 相油腔部分(C31)和所述第二调相油腔部分(C32)通过不同的通道(A3、B3)受控地与进油通道或排油通道连通。The camshaft phaser according to claim 7 according to any one of claims 2 to 6, characterized in that, the rotor blades (22) separate the corresponding phase modulation oil chambers (C3) to be independent of each other The first phase adjusting oil chamber part (C31) and the second phase adjusting oil chamber part (C32), the first phase adjusting oil chamber part (C31) and the second phase adjusting oil chamber part (C32) pass different The passages (A3, B3) of the control panel are communicated with the oil inlet passage or the oil discharge passage in a controlled manner.
  9. 根据权利要求1至8中任一项所述的凸轮轴相位器，其特征在于，所述第一止动油腔(C1)和所述第二止动油腔(C2)在所述周向(CR)上交替地均匀分布。The camshaft phaser according to any one of claims 1 to 8, wherein the first stop oil chamber (C1) and the second stop oil chamber (C2) are in the circumferential direction (CR) alternately and evenly distributed.
  10. 一种权利要求2至9中任一项所述的凸轮轴相位器的工作方法，所述工作方法包括：A working method of a camshaft phaser according to any one of claims 2 to 9, the working method comprising:
    当需要所述转子(2)朝向所述周向一侧相对于所述定子(1)转动调相时，所述第一止动油腔(C1)的小腔部分(C11)与进油通道连通使得向该小腔部分(C11)充油，所述第二止动油腔(C2)的小腔部分(C21)与排油通道连通使得从该小腔部分(C21)排油，从而使得所述第一止动油腔(C1)内的单向止动机构(3)解除阻止所述转子(2)相对于所述定子(1)朝向周向一侧转动的止动作用，且所述第二止动油腔(C2)内的单向止动机构(3)保持阻止所述转子(2)相对于所述定子(1)朝向周向另一侧转动的止动作用；When the rotor (2) needs to be rotated toward the circumferential side relative to the stator (1) for phase modulation, the small cavity portion (C11) of the first stop oil cavity (C1) and the oil inlet channel The communication allows the small cavity portion (C11) to be filled with oil, and the small cavity portion (C21) of the second stop oil cavity (C2) communicates with the oil drain passage so that oil is drained from the small cavity portion (C21), thereby making The one-way stop mechanism (3) in the first stop oil chamber (C1) releases the stop function of preventing the rotor (2) from rotating toward the circumferential side relative to the stator (1), and so The one-way stop mechanism (3) in the second stop oil chamber (C2) keeps the stop function of preventing the rotor (2) from rotating toward the other side of the circumferential direction relative to the stator (1);
    当需要所述转子(2)朝向所述周向另一侧相对于所述定子(1)转动调相时，所述第一止动油腔(C1)的小腔部分(C11)与排油通道连通使得从该小腔部分(C11)排油，所述第二止动油腔(C2)的小腔部分(C21)与进油通道连通使得向该小腔部分(C21)充油，从而使得所述第一止动油腔(C1)内的单向止动机构(3)保持阻止所述转子(2)相对于所述定子(1)朝向周向一侧转动的止动作用，且所述第二止动油腔(C2)内的单向止动机构(3)解除阻止所述转子(2)相对于所述定子(1)朝向周向另一侧转动的止动作用；以及When the rotor (2) is required to rotate relative to the stator (1) toward the other side of the circumferential direction for phase modulation, the small cavity portion (C11) of the first stop oil cavity (C1) and the oil drain The passage communicates to drain oil from the small cavity portion (C11), and the small cavity portion (C21) of the second stop oil cavity (C2) communicates with the oil inlet passage so that the small cavity portion (C21) is filled with oil, thereby So that the one-way stop mechanism (3) in the first stop oil chamber (C1) maintains the stop function of preventing the rotor (2) from rotating toward the circumferential side relative to the stator (1), and The one-way stop mechanism (3) in the second stop oil chamber (C2) releases the stop function of preventing the rotor (2) from rotating toward the other side in the circumferential direction relative to the stator (1); and
    当需要所述转子(2)相对于所述定子(1)保持当前位置时，不向所述第一止动油腔(C1)的小腔部分(C11)和所述第二止动油腔(C2)的小腔 部分(C21)充油，从而使得所述第一止动油腔(C1)内的单向止动机构(3)保持阻止所述转子(2)相对于所述定子(1)朝向周向一侧转动的止动作用，并且所述第二止动油腔(C2)内的单向止动机构(3)保持阻止所述转子(2)相对于所述定子(1)朝向周向另一侧转动的止动作用。When the rotor (2) needs to maintain the current position relative to the stator (1), the small cavity portion (C11) of the first stop oil chamber (C1) and the second stop oil chamber are not The small cavity part (C21) of (C2) is filled with oil, so that the one-way stop mechanism (3) in the first stop oil chamber (C1) keeps preventing the rotor (2) from relative to the stator ( 1) The one-way stop mechanism (3) in the second stop oil chamber (C2) keeps preventing the rotor (2) from rotating relative to the stator (1). ) To stop the rotation toward the other side of the circumferential direction.
PCT/CN2020/097060 2020-06-19 2020-06-19 Camshaft phaser and working method therefor WO2021253387A1 (en)

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CN1621662A (en) * 2003-11-27 2005-06-01 三菱电机株式会社 Valve timing adjusting device and assembly apparatus of the same
CN102472126A (en) * 2009-07-07 2012-05-23 谢夫勒科技有限两合公司 Camshaft adjuster
CN103161539A (en) * 2011-12-09 2013-06-19 日立汽车***株式会社 Valve timing control apparatus of internal combustion engine
JP2015158191A (en) * 2014-02-25 2015-09-03 アイシン精機株式会社 Valve opening/closing timing controller
WO2016114019A1 (en) * 2015-01-16 2016-07-21 日立オートモティブシステムズ株式会社 Valve timing control device for internal combustion engine
US10077688B2 (en) * 2015-02-25 2018-09-18 Schaeffler Technologies AG & Co. KG Cam shaft phaser with mid-position and retard lock position

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1621662A (en) * 2003-11-27 2005-06-01 三菱电机株式会社 Valve timing adjusting device and assembly apparatus of the same
CN102472126A (en) * 2009-07-07 2012-05-23 谢夫勒科技有限两合公司 Camshaft adjuster
CN103161539A (en) * 2011-12-09 2013-06-19 日立汽车***株式会社 Valve timing control apparatus of internal combustion engine
JP2015158191A (en) * 2014-02-25 2015-09-03 アイシン精機株式会社 Valve opening/closing timing controller
WO2016114019A1 (en) * 2015-01-16 2016-07-21 日立オートモティブシステムズ株式会社 Valve timing control device for internal combustion engine
US10077688B2 (en) * 2015-02-25 2018-09-18 Schaeffler Technologies AG & Co. KG Cam shaft phaser with mid-position and retard lock position

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