WO2015035856A1

WO2015035856A1 - Regulating method and apparatus for independently and continuously variable valve timing and valve lift

Info

Publication number: WO2015035856A1
Application number: PCT/CN2014/084973
Authority: WO
Inventors: 谢庆生; 王自勤; 田丰果
Original assignee: Xie Qingsheng
Priority date: 2013-09-10
Filing date: 2014-08-22
Publication date: 2015-03-19
Also published as: CN104421007A

Abstract

A regulating apparatus for independently and continuously variable valve timing and valve lift, comprising a cam (1), a valve (2), a hydraulic system provided between the cam (1) and the valve (2), and, parallel-connected in a hydraulic oil-way (6) between a cam cylinder (4) and a valve cylinder (5), one valve timing regulator (7) and one valve lift regulator (15). The valve timing regulator (7) comprises a valve timing regulator cylinder (8), a valve timing regulator piston (9), a valve timing regulator piston resetting apparatus (10), and a valve timing regulator limiting apparatus (11). The valve lift regulator (15) comprises a valve lift regulator cylinder (16), a valve lift regulator piston (17), a valve lift regulator resetting apparatus (18), and a valve lift regulator limiting apparatus (19). The regulating apparatus allows both valve timing and valve lift of an engine to be continuously and independently variable, thus allowing for increased fuel economy and dynamics of the engine and for improved emissions. Also disclosed is a regulating method for independently and continuously variable valve timing and valve lift.

Description

Instruction manual

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of engine technology, and in particular to an adjustment method in which an engine valve phase and a valve lift are independently and continuously adjustable. It also relates to the apparatus used in the adjustment method.

BACKGROUND OF THE INVENTION Engines have different requirements for valve timing and valve lift under different operating conditions. Adjusting the valve timing according to the engine speed and adjusting the valve lift according to the engine load is one of the important technical means to improve and improve engine power characteristics, fuel economy and reduce harmful gas emissions. At present, the adjustment methods of the valve timing and valve lift are mainly as follows: 1) Different cams are used to adjust the phase of the valve. This method can only obtain the best valve phase at a few specific speeds. There are disadvantages such as the inability to achieve continuous adjustment of the phase. 2) Adjusting the phase of the valve by changing the relative angle between the camshaft and the crankshaft. In this type of method, if the advance angle is increased, the lag angle will be reduced. If the advance angle is decreased, the lag angle will be increased. It satisfies the shortcomings such as the increase or decrease of the engine speed, the adjustment requirement of the valve advance angle and the retard angle simultaneously increasing or decreasing at the same time. 3) Hydraulically actuated valves are used, and solenoid valves or other hydraulic valves are used to control the hydraulic oil circuit that drives the valves to adjust the phase or lift of the valve. In this type of method, there are many solenoid valves or other hydraulic valves that need to be configured. The structure and control are complex, and the high-frequency response performance of the solenoid valve is not good. 4) The amplifying mechanism is added to the follower of the cam mechanism to realize the adjustment of the valve lift. This method has the disadvantages of complicated mechanism and high dynamic characteristics. Due to the above-mentioned limitations of the variable valve timing and variable lift technology, the engine with the variable valve phase and the variable valve lift system has no obvious improvement effect on the fuel economy and the harmful gas discharge index. At present, most engines are not equipped with a variable valve phase and a variable lift device. The control of the gas intake air volume uses a throttle valve. The use of the throttle valve is not conducive to the flow of the intake air flow, which increases the pumping loss of the engine. , engine fuel economy And harmful gas emission indicators are poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a continuous and independent adjustment of an engine valve phase and a valve lift, which can improve engine fuel economy, improve power and emissions, and independently and continuously adjust the valve phase and valve lift. Adjustment method of adjustment. Another object of the present invention is to provide an adjustment device in which the valve timing and valve lift are independently and continuously adjustable. The object of the present invention and the main technical problem of the present invention are achieved by the following technical solutions: A method for independently and continuously adjusting the valve phase and valve lift of the present invention includes:

(1) a gas distribution phase adjuster and a valve lift adjuster are connected in parallel in the hydraulic oil circuit between the cam cylinder and the valve cylinder of the variable valve train of the hydraulic variable cam follower;

(2) The gas distribution phase adjuster includes a gas distribution phase adjuster cylinder, a gas distribution phase adjuster piston, a gas distribution phase adjuster piston return device, and a gas distribution phase adjuster clamp device, through the gas distribution phase adjuster piston The return force generated by the returning device causes the valve of the valve phase adjuster to keep moving toward the zero position. The valve of the valve phase adjuster is controlled by the valve phase adjuster from the zero position to the valve phase adjuster. The stroke between the limiting devices controls the oil flowing into the cylinder of the gas distribution phase adjuster as a continuous angle to realize continuous variable control of the valve timing phase; wherein: the valve of the gas distribution phase adjuster when the piston of the gas distribution phase adjuster is at the zero position The oil pressure corresponding to the return force and the return force of the valve phase adjuster piston reaching the maximum adjustable stroke is less than the oil pressure corresponding to the opening of the valve by the hydraulic system against the valve spring preload;

(3) The valve lift adjuster includes a valve lift adjuster cylinder, a valve lift adjuster piston, a valve lift adjuster piston return device, and a valve lift adjuster limit device, and the piston is lifted through the valve lift adjuster. The return force generated by the position device keeps the valve lift regulator piston in the direction of zero The trend of movement, controlling the stroke between the valve lift regulator piston from the zero position to the valve lift regulator limit device by the valve lift adjuster limit device, thereby controlling the volume of oil flowing into the valve lift adjuster, In turn, the amount of oil flowing into the valve cylinder is controlled, and finally the control valve lift continuously variable control is realized; wherein: the hydraulic system overcomes the valve lift regulator piston return force when the valve lift regulator piston is at the zero position, and pushes the valve lift The oil pressure corresponding to the movement of the regulator piston is greater than the oil pressure corresponding to the opening of the valve by the system against the preload of the valve spring, and the piston return force of the valve lift adjuster is reached when the valve lift adjuster piston reaches the maximum adjustable stroke. The oil pressure is less than the oil pressure corresponding to the valve spring force when the valve reaches the required minimum lift. The above-mentioned gas distribution phase and valve lift are independently and continuously adjustable adjustment methods, wherein: the hydraulic oil circuit is provided with an oil replenishing device, and the oil pressure is smaller than the piston return position when the piston of the system 艮 gas distribution phase adjuster is at the zero position The force corresponds to the oil pressure corresponding to the movement of the valve phase adjuster piston. The above-mentioned gas distribution phase and valve lift are independent and continuously adjustable adjustment methods, wherein: the restriction device of the gas distribution phase adjuster and the valve lift adjuster is a limit rod, a limit block or a limit sleeve. The above-mentioned valve phase and valve lift are independently and continuously adjustable, wherein: the piston returning device of the valve phase adjuster and the valve lift adjuster is a hydraulic device, a pneumatic device, an electromagnetic device or/and a spring, etc. . The gas distribution phase and the valve lift of the invention are independent and continuously adjustable adjusting devices, including a cam and a valve, and a hydraulic system is provided between the cam and the valve, wherein: the hydraulic oil circuit between the cam cylinder and the valve cylinder is connected in parallel A gas distribution phase adjuster and a valve lift regulator, the gas distribution phase adjuster includes a gas distribution phase adjuster cylinder, a gas distribution phase adjuster piston, a gas distribution phase adjuster spring, a gas distribution phase adjuster limit The gas distribution phase adjuster piston is located in the gas distribution phase adjuster cylinder, and the rear end of the valve of the gas distribution phase adjuster is provided with a gas distribution phase adjuster spring and a gas distribution phase adjuster limit rod; the valve lift adjuster includes a valve lift Process adjuster cylinder, valve lift adjuster piston, valve lift adjuster spring, valve lift adjuster limit rod, valve lift adjuster piston are located in the valve lift regulator cylinder, the valve lift adjuster piston A valve lift adjuster spring and a limit rod are provided at the rear end. The above-mentioned valve phase and valve lift are independent and continuously adjustable adjusting devices, among which: hydraulic system Overcoming the valve pre-tightening force of the valve phase adjuster and the force of the valve phase adjuster spring when the valve of the valve phase adjuster reaches the maximum adjustable stroke, the oil pressure corresponding to the piston movement of the valve phase adjuster is smaller than The hydraulic system presses the valve spring preload to open the oil pressure corresponding to the valve; the hydraulic system overcomes the valve lift adjuster spring preload and pushes the valve lift adjuster piston to correspond to the oil pressure greater than the system overcomes the valve spring Preloading force to open the oil pressure corresponding to the valve, when the valve lift adjuster piston reaches the maximum adjustable stroke, the force corresponding to the force of the valve lift adjuster spring is smaller than the valve spring when the valve reaches the required minimum lift The oil pressure corresponding to the force. The above-mentioned valve phase and valve lift are independent and continuously adjustable adjusting devices, wherein: the valve phase adjuster spring can be inserted into the rear chamber of the piston of the valve phase adjuster into the pressure oil or a combination of the pressure oil and the spring. Equivalent replacement. The above-mentioned valve timing and valve lift are independent and continuously adjustable adjusting devices, wherein: the valve lift regulator spring can be inserted into the rear oil chamber of the valve lift regulator piston into the pressure oil or a combination of the pressure oil and the spring. Equivalent replacement. The present invention has significant advantages and advantageous effects over the prior art. According to the above technical solution, the invention adopts a hydraulic volume adjustment type adjustment method, so that the engine can obtain a proper valve phase and valve lift under various speed and load conditions, cancel the throttle valve, reduce the pump power loss, and improve. Intake and exhaust conditions, prevent exhaust gas backflow, reduce useful work loss, improve fuel combustion efficiency, reduce harmful gas emissions, improve engine performance; use volume control, control accuracy, adjust the cylinder; gas distribution phase and valve lift adjustment range Wide, continuous adjustment under full engine operating conditions, greatly improving and improving the power, economy and emissions under various engine operating conditions; phase adjuster and valve lift adjustment for certain engine operating conditions The controller only needs to adjust the position of the corresponding limit rod, and the system can automatically perform adaptive operation. It does not need to perform high-frequency and repeated adjustment actions for each cycle of the engine, and has good system adaptability and dynamic response characteristics. ; All the intake and exhaust valve phase regulators of the engine can share one The drive unit, the lift adjuster of all intake valves, can share a single drive unit, the structure is simple, and the economy is good; the valve phase adjuster and the valve lift adjuster independently adjust the valve phase and valve lift respectively. The engine's valve timing adjustment and valve lift adjustment are independent of each other, which can meet the adjustment requirements of various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a device of the present invention. In the picture:

1, cam; 2, valve; 3, hydraulic system; 4, cam cylinder; 5, valve cylinder; 6, hydraulic oil circuit; 7, gas phase adjuster; 8, gas phase regulator oil rainbow; Gas phase regulator piston; 10, gas phase adjuster spring; 11, gas phase adjuster clamp; 12, valve spring; 13, cam oil rainbow piston; 14, valve cylinder piston; 15, valve lift Regulator; 16, valve lift regulator cylinder; 17, valve lift regulator piston; 18, valve lift adjuster spring; 19, valve lift adjuster limit rod.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the specific embodiments, structures, features and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. Embodiment 1 An independent and continuously adjustable adjustment method for a valve phase and a valve lift includes:

(1) A gas distribution phase adjuster and a valve lift regulator are connected in parallel in the hydraulic oil circuit between the cam cylinder and the valve cylinder of the variable valve train of the hydraulic variable cam follower, and the valve phase adjustment The valve and the valve lift adjuster independently adjust the valve phase and the valve lift;

(2) The gas distribution phase adjuster includes a gas distribution phase adjuster cylinder, a gas distribution phase adjuster piston, a gas distribution phase adjuster piston return device, and a gas distribution phase adjuster clamp device, through the gas distribution phase adjuster piston The returning force generated by the returning device keeps the valve of the valve phase adjuster in the direction of zero position (the position of the valve phase adjuster cylinder is zero), and the valve is controlled by the valve phase adjuster limiter. Position regulator piston from zero position to the valve phase regulator limiter The stroke controls the volume of the oil flowing into the cylinder of the gas distribution phase adjuster, thereby controlling the timing of the oil flowing into the valve cylinder and the effective working angle corresponding to the rotation of the cam, thereby realizing the continuously variable control of the valve phase; When the position regulator piston is in the zero position, the valve return force of the valve phase adjuster and the return force of the valve phase adjuster piston reaching the maximum adjustable stroke are less than the hydraulic system. Press the force to open the valve corresponding to the oil pressure.

(3) The valve lift adjuster includes a valve lift adjuster cylinder, a valve lift adjuster piston, a valve lift adjuster piston return device, and a valve lift adjuster limit device, and the piston is lifted through the valve lift adjuster. The return force generated by the position device keeps the valve lift regulator piston always moving toward the zero position (the position of the valve lift regulator cylinder is zero), and the valve lift is controlled by the valve lift adjuster limit device. The stroke of the regulator piston from the zero position to the valve lift regulator limit device, thereby controlling the volume of oil flowing into the valve lift regulator, thereby controlling the amount of oil flowing into the valve cylinder, and finally achieving continuous control of the valve lift. Variable control; wherein: the hydraulic system overcomes the valve lift adjuster piston return force when the valve lift adjuster piston is at the zero position, and pushes the valve lift adjuster piston movement corresponding to the oil pressure is greater than the system 艮月艮 valve spring pre Pressing the oil pressure corresponding to the valve, the valve lift adjuster piston reaches the maximum adjustable stroke, and the valve lift adjuster piston return force It should be less than the hydraulic force of the valve spring for the valve to the hydraulic pressure corresponding to the desired minimum lift. The hydraulic oil circuit is provided with an oil replenishing device, and the oil pressure is less than the hydraulic pressure corresponding to the piston returning force when the piston of the system 艮 gas distribution phase adjuster is at the zero position, and the piston of the gas distribution phase adjuster is moved. The limit devices of the valve phase adjuster and the valve lift adjuster are limit rods, limit blocks or limit sleeves. The piston returning device of the valve phase adjuster and the valve lift adjuster is a hydraulic device, a pneumatic device, an electromagnetic device or/and a spring. Embodiment 2 An independent and continuously adjustable adjusting device for the valve phase and the valve lift includes a cam 1, a valve 2, and a hydraulic system 3 between the cam 1 and the valve 2, wherein: the cam cylinder 4 and the valve cylinder A gas distribution phase adjuster Ί and a valve lift adjuster 15 are connected in parallel between the hydraulic oil circuit 6 of 5; Wherein: the gas distribution phase adjuster 7 includes a gas distribution phase adjuster cylinder 8, a gas distribution phase adjuster piston 9, a gas distribution phase adjuster spring 10, a gas distribution phase adjuster limit 4 dry 11, a gas distribution phase adjuster piston 9 is located in the gas distribution phase adjuster cylinder 8, and the rear end of the gas distribution phase adjuster piston 9 is provided with a gas distribution phase adjuster spring 10 and a gas distribution phase adjuster limit rod 11; the valve lift adjuster 15 includes a valve lift The regulator cylinder 16, the valve lift regulator piston 17, the valve lift adjuster spring 18, the valve lift adjuster limit lever 19, the valve lift adjuster piston 17 are located in the valve lift regulator cylinder 16, the valve lift The valve adjuster piston 17 is provided with a valve lift adjuster spring 18 and a valve lift adjuster limit lever 19 at the rear end. Hydraulic system 艮艮调调 phase adjuster spring 10 preload and valve phase adjuster piston 9 reaches the maximum adjustable stroke of the valve phase adjuster spring 10 to push the valve phase adjuster piston 9 movement The corresponding oil pressure is less than the hydraulic pressure corresponding to the opening of the valve 2 by the hydraulic system against the preload of the valve spring 12. The hydraulic system overcomes the preload force of the valve lift adjuster spring 18 and pushes the valve lift adjuster piston 17 to move the oil pressure corresponding to the oil pressure corresponding to the system to overcome the preload of the valve spring 12 and open the valve 2, the valve lift When the regulator piston 17 reaches the maximum adjustable stroke, the force corresponding to the force of the valve lift adjuster spring 18 is less than the oil pressure corresponding to the force of the valve spring 12 when the valve 2 reaches the required minimum lift. The valve timing adjuster spring 10 can be equivalently replaced by a combination of introducing pressure oil or introducing a combination of pressure oil and spring in the rear chamber of the valve phase adjuster piston 9. The valve lift adjuster spring 18 may be equivalently replaced by a combination of introducing pressurized oil or introducing a combination of pressurized oil and spring in the rear chamber of the valve lift regulator piston 17.

The working process is as follows: When the rear end of the cam cylinder piston 13 is in the cam base circle at the rear end of the cam cylinder piston 13 , the valve 9 is at zero under the spring force (return force) of the valve phase adjuster spring 10 Position (position where the gas phase adjuster cylinder 8 has a volume of zero). Adjusting the position of the valve phase adjuster limit 4 dry 11 can control the valve phase adjuster piston 9 from the zero position to the phase adjuster limit lever 11 The stroke, thereby controlling the volume of oil flowing into the gas phase regulator cylinder 8, thereby controlling the timing of the oil flowing into the valve cylinder 5 and its effective working angle corresponding to the rotation of the cam 1, and finally achieving the control of the gas distribution phase continuously Variable control. The valve lift adjuster piston 17 is at the zero position (valve force) under the action of the spring lift (return force) of the valve lift adjuster spring 18 when the rear end of the cam oil rainbow piston 13 is a cam base circle at the contact with the cam 1 The position of the lift regulator cylinder 16 is zero). Adjusting the position of the valve lift adjuster limit lever 19 controls the stroke between the valve lift adjuster piston 17 from the zero position to the valve lift adjuster limit lever 19, thereby controlling the flow into the valve lift regulator cylinder 16 The volume of the oil, which in turn controls the amount of oil flowing into the valve cylinder 5, ultimately achieves the purpose of regulating and controlling the valve lift. When the engine is running at the highest speed, the valve phase adjuster limit lever 11 is adjusted to zero with the clearance of the rear end of the valve phase adjuster piston 9 and the valve phase adjuster piston 9 is pushed to the zero position, and then the flow can be flown in. The gas phase regulator has a zero oil volume. When the cam 1 is in the lift, the hydraulic system hydraulic pressure rises under the action of the cam oil rainbow piston 13, and when the oil pressure rises until the force of the system acting on the valve cylinder piston 14 is greater than the preload of the valve spring 12, the hydraulic oil flows in. The valve cylinder 5 pushes the valve cylinder piston 14 to move while the valve 1 is opened and the opening is continuously increased until the end of the cam 1 lift. When the cam 1 is in the return stroke, the valve 2 is retracted by the valve spring 12, the oil returns to the cam oil rainbow 4, and the oil pressure drops, and when the oil pressure drops to the system, the force acting on the valve oil rainbow piston 14 is less than When the valve spring 12 is preloaded, the valve 2 is closed. As described above, in this process, the timing at which the oil flows into the valve cylinder 5 is the earliest, and the time at which the oil flows out from the valve cylinder 5 at the latest is the latest, and the valve phase obtains the maximum advance angle, the maximum retard angle, and the maximum effective working angle. When the engine is at the minimum speed operation, the valve phase adjuster limit lever 11 is adjusted to the clearance of the rear end of the valve phase adjuster piston 9 to the maximum value of the adjustment range thereof, and the oil of the valve phase adjuster 7 can be flown. The volume of the liquid is the largest. When the cam 1 is in the lift, the hydraulic system hydraulic pressure rises under the action of the cam oil rainbow piston 14, and when the oil pressure rises to the system, the force acting on the valve phase adjuster piston 9 is greater than the valve phase adjuster spring 10 When tightening, the valve phase adjuster piston 9 starts to move, and the hydraulic oil first flows into the valve phase adjuster cylinder 8 and the volume of the inflow continues to increase until the rear end of the valve phase adjuster piston 9 and the valve phase adjuster limit The rod 11 is in contact. After the valve of the valve phase adjuster piston 9 stops, the oil pressure of the system further rises. When the oil pressure rises, the system acts on the valve cylinder. When the force of the piston 14 is greater than the preload of the valve spring 12, the hydraulic oil begins to flow into the valve cylinder 5 to push the valve oil rainbow piston 14 to move while the valve 2 is opened and the opening degree is continuously increased until the end of the lift of the cam 1. When the cam 1 is in the return stroke, the valve 2 first falls back under the action of the valve spring 12, the oil returns to the cam oil rainbow 4, and the oil pressure drops, when the oil pressure drops to the force of the system acting on the valve oil rainbow piston 14. When the valve spring 12 is less than the preload, the valve 2 is closed. After the valve 2 is closed, the oil in the valve phase adjuster 7 is also started to return to the cam oil rainbow 4 under the spring force of the valve phase regulator until the valve phase adjuster piston 9 returns to the zero position. As described above, in this process, the time when the oil flows into the valve cylinder 5 is the latest, the time when the oil flows out from the valve cylinder 5 at the earliest, and the valve phase obtains the minimum advance angle, the minimum retard angle, and the minimum effective working angle. When the engine is running between the highest and lowest speeds, the valve phase adjuster limit lever 11 is adjusted to a reasonable value according to the operating condition of the engine, and the system can obtain a reasonable advance angle, a retard angle and an effective working angle. When the engine is at the maximum load operation, the valve lift adjuster limit lever 19 is adjusted to zero with the clearance of the rear end of the valve lift adjuster piston 17 and the valve lift adjuster piston 17 is pushed to the zero position, and the valve can be flowed in. The lift regulator 15 has zero oil. When the cam 1 is in the lift, the hydraulic system oil pressure rises under the action of the cam oil rainbow piston 13, and when the oil pressure rises until the force of the system acting on the valve cylinder piston 14 is greater than the preload force of the valve spring 12, the hydraulic oil flows in. The valve cylinder 5 pushes the valve oil rainbow piston 14 to move while the valve is opened and the opening is continuously increased until the cam lift ends. When the cam 1 is in the return stroke, the valve 2 is retracted by the valve spring 12, the oil returns to the cam oil rainbow 4, and the oil pressure drops, and when the oil pressure drops to the system, the force acting on the valve oil rainbow piston 14 is less than When the valve spring 12 spring preload, the valve 2 is closed. As described above, in the process, all of the oil flowing out of the cam cylinder 4 flows into the valve cylinder 5, and the lift of the valve 2 is maximized. When the engine is at the minimum load operation, the valve lift adjuster limit lever 19 is adjusted to the clearance with the rear end of the valve lift adjuster piston 17 to the maximum value of the adjustment range thereof, and the oil of the valve lift adjuster 15 can be flown. The amount is the largest. When the cam 1 is in the lift, the hydraulic pressure of the hydraulic system rises under the action of the cam cylinder piston 13. When the oil pressure rises until the force of the system acting on the valve oil rainbow piston 14 is greater than the preload of the valve spring 12, the hydraulic oil first The inflow valve cylinder 5 pushes the valve cylinder piston 14 to move while the valve 2 is open. As the valve 2 lift increases, the system oil pressure rises further, when the oil When the pressure is raised until the force of the system acting on the valve lift regulator piston 17 is greater than the preload force of the valve lift adjuster spring 18, the hydraulic oil flowing into the valve lift regulator cylinder 16 pushes the valve lift adjuster piston 17 to move and flows in. The volume continues to increase until the rear end of the valve lift adjuster piston 17 is in contact with the valve lift adjuster limit lever 19. At the same time as the valve lift adjuster piston 17 moves, the valve lift is also continuously increased. After the valve lift adjuster piston 17 is stopped, the system oil pressure is further increased, and the valve lift continues to increase until the cam lift ends. When the cam 1 is in the return stroke, the valve 2 is retracted by the valve spring 12, the oil returns to the cam oil rainbow 4, and the oil pressure drops, when the oil pressure drops to the force of the system acting on the valve lift regulator piston 17. When the spring force is less than the spring force at the rear end of the valve lift adjuster piston 17, the valve lift adjuster piston 17 also starts to return under the action of the spring force, and the oil in the valve lift adjuster 16 also starts to return to the cam oil rainbow 4 until the valve The lift adjuster piston 17 returns to the zero position (the position of the valve lift regulator cylinder is zero). During the return of the valve lift regulator piston 17, the valve 2 is also continuously falling, the system oil pressure is continuously lowered, and when the oil pressure drops to a force acting on the valve cylinder piston 14 less than the preload of the valve spring 12, Valve 2 is closed. As described above, in this process, the oil flowing out of the cam oil rainbow 4 flows into the valve lift adjuster 7 with the largest volume, and the volume flowing into the valve cylinder 5 is the smallest, and the valve lift is minimized. When the engine is running between the maximum and minimum loads, the valve lift adjuster limit lever 19 is adjusted to a reasonable value according to the operating conditions of the engine, and the system can obtain a reasonable valve lift. When the engine is in need of simultaneous gas distribution phase and valve lift adjustment, the valve phase adjuster limit rod 11 and the valve lift adjuster clamp rod 19 are simultaneously adjusted to a reasonable position according to the operating conditions of the engine, the system A reasonable valve timing and valve lift can be obtained.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any modification to the above embodiments can be made according to the technical essence of the present invention without departing from the technical scope of the present invention. And equivalent changes and modifications are still within the scope of the technical solution of the present invention.

Claims

Claim

1. An independent and continuously adjustable adjustment method for a valve phase and a valve lift, comprising: (1) a hydraulic pressure between a cam cylinder and a valve cylinder of a variable valve train of a hydraulic variable cam follower a gas distribution phase adjuster and a valve lift adjuster are connected in parallel in the oil circuit;

(3) The valve lift adjuster includes a valve lift adjuster cylinder, a valve lift adjuster piston, a valve lift adjuster piston returning device and a valve lift adjuster limit device, and the piston is lifted through the valve lift adjuster. The return force generated by the position device keeps the valve lift regulator piston moving to the zero direction at all times, and the valve lift adjuster piston is controlled from the zero position to the valve lift adjuster limit by the valve lift adjuster limit device. The stroke between the devices, thereby controlling the volume of oil flowing into the valve lift regulator, thereby controlling the amount of oil flowing into the valve cylinder, and finally achieving continuous control of the control valve lift; wherein: the hydraulic system overcomes the valve lift regulator When the piston is in the zero position, the valve lift regulator piston returning force pushes the valve lift regulator piston to correspond to the hydraulic pressure corresponding to the system's pre-tightening force of the valve spring and opens the valve corresponding to the oil pressure, the valve rises When the regulator piston reaches the maximum adjustable stroke, the valve lift force of the valve lift regulator is lower than the minimum required lift of the valve. When the valve spring force corresponding to the hydraulic pressure.

2. The valve phase and valve lift according to claim 1 are independently and continuously adjustable. The method is characterized in that: the hydraulic oil circuit is provided with an oil replenishing device, and the oil pressure is less than the oil pressure corresponding to the piston returning force of the system when the piston of the gas distribution phase adjuster is at the zero position, so that the piston of the gas distribution phase adjuster moves .

3. The method according to claim 1 or 2, wherein the valve timing and the valve lift are independently and continuously adjustable, wherein: the limiting device of the valve phase adjuster and the valve lift adjuster is limited to 4 , limit block or limit set.

4. The method according to claim 3, wherein the valve phase returning device and the valve lifter of the valve lift adjuster are hydraulic devices and air pressure. Device, electromagnetic device or / and spring.

5. An independent and continuously adjustable adjusting device for the valve phase and the valve lift, comprising a cam (1), a valve (2), a hydraulic system (3) between the cam (1) and the valve (2), The utility model is characterized in that: a gas distribution phase adjuster (7) and a valve lift adjuster (15) are connected in parallel in the hydraulic oil circuit (6) between the cam oil rainbow (4) and the valve cylinder (5), wherein: The gas distribution phase adjuster (7) includes a gas distribution phase adjuster cylinder (8), a gas distribution phase adjuster piston (9), a gas distribution phase adjuster spring (10), a gas distribution phase adjuster limit rod (11) The gas distribution phase adjuster piston (9) is located in the gas distribution phase adjuster cylinder (8), and the rear end of the gas distribution phase adjuster piston (9) is provided with a gas distribution phase adjuster spring (10) and a gas distribution phase adjuster Limit lever (11); Valve lift adjuster (15) includes valve lift regulator cylinder (16), valve lift adjuster piston (17), valve lift adjuster spring (18), valve lift adjustment Limit rod ( 19), valve lift adjuster piston ( 17) is located at the valve lift adjustment An inner cylinder (16), the valve lift regulator piston (17) is provided with the rear end of the valve lift adjustment spring (18) and a valve lift adjuster limiting rod (19).

6. The independent and continuously adjustable adjusting device for the valve timing and the valve lift according to claim 5, wherein: the hydraulic system is equipped with a gas phase adjuster spring (10) preload and valve phase adjustment The piston (9) reaches the maximum adjustable stroke of the valve phase adjuster spring (10) and pushes the valve phase adjuster piston (9) to move less than the hydraulic system to overcome the valve spring (12) The pre-tightening force opens the corresponding hydraulic pressure of the valve (2), and the hydraulic system overcomes the preload of the valve lift adjuster spring (18) to push the movement of the valve lift adjuster piston (17). The oil pressure is greater than the hydraulic pressure corresponding to the valve (2) pre-tightening force of the system, and the valve lift adjuster piston (17) reaches the maximum adjustable stroke when the valve lift adjuster spring ( 18) The force corresponding to the oil pressure is less than the oil pressure corresponding to the force of the valve spring (12) when the valve (2) reaches the required minimum lift.

7. The regulating valve of the gas distribution phase and the valve lift according to claim 6 independently and continuously adjustable, characterized in that: the valve phase adjuster spring (10) can be behind the valve phase adjuster piston (9) Equivalent replacement of the cavity by introducing pressure oil or by introducing a combination of pressure oil and spring.

8. The independently adjustable continuously adjustable regulating valve phase and valve lift according to claim 7, wherein: the valve lift adjuster spring (18) is available behind the valve lift regulator piston (17) Equivalent replacement of the cavity by introducing pressure oil or by introducing a combination of pressure oil and spring.