• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A hydraulic system for actuating gas-change valves in internal combustion engines or compressors wherein the output piston associated with each gas-change valve is capable of being moved against the force of a closing spring through a control circuit filled with control fluid by an input piston operable by a cam, with means for venting the control fluid at the highest point of the hydraulic system, and wherein the input cylinder communicates with a system for refilling with control fluid. The means for venting the control fluid are formed as permanent venting means, a variable area restrictor determining the amount of control fluid in the hydraulic system during operation is provided which is located in a discharge circuit, and the cam actuating the output piston is formed with a pre-ramp and a post-ramp.
    公开号:SU997614A3
    申请号:SU792811703
    申请日:1979-09-14
    公开日:1983-02-15
    发明作者:Цюрнер Хансюрген；Фурманн Вельфганг
    申请人:Машиненфабрик Аугсбург-Нюрнберг Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to mechanical engineering and can be used in gas distribution mechanisms with | hydraulic actuated valves of internal combustion engines or 5 reciprocating compressors.
    Known hydraulic valve actuators for valves of internal combustion engine 10 or pis- nevogo compressor comprising a drive cylinder, which interacts with a cam of a camshaft in an internal cavity of which the piston-mounted sensor, the executive Tel'nykh cylinder 15, the inner half, which is mounted STI piston valve control, and the actuating and actuating cylinders are connected by a pressure pipeline, at the highest point of which are placed means for deaerating the working fluid, ennye the drainage pipeline and device for feeding working fluid £ 1]. ''
    However, in such devices, as a result of the alternate drainage of the liquid, significant fluctuations can occur, which leads to a violation of valve control.
    The purpose of the invention is to increase reliability .. '
    This goal is achieved by the fact that in the drive means for deaeration of the working fluid are made in the form of an uncontrolled throttle and a separator installed behind it with an overflow Pipeline, a drain pipe ·. equipped with an adjustable throttle, and the cam is made with the occipital part, the radius of which is less than the radius of the main circumference of the cam and is coupled to the latter through stepless transitions.
    The drain pipe is equipped with a check valve installed behind an adjustable throttle.
    The make-up device comprises a make-up tank, a make-up pipe with a pump and a bypass valve 997614, a receiver and a filling valve, the latter not being blocked by the piston sensor in any of its positions.
    As the working fluid used oil.
    The drawing shows the proposed device,
    The hydraulic valve timing includes a drive cylinder 1, in the inner cavity of which a piston-sensor 2 is installed, which interacts with a cam 3 of the camshaft, an actuating cylinder 4, in the inner surface of which a piston 5 for controlling the spring-loaded valve 6 is installed,
    The drive 1 and actuator 4 cylinders are connected by a discharge pipe 7, at the upper point of which there are means for deaerating the working fluid, made in the form of an unregulated throttle 8 and a separator 9 installed behind it with an overflow pipe 10. The drain pipe-15 line 11 is equipped with an adjustable a throttle 12 and a check valve 13, installed behind the adjustable throttle, and the cam 3 is made with the occipital part, the radius of which is less than the radius of the main circle 14 of the cam and paired with the latter through dbccType Started changes 15 and 16.
    The hydraulic actuator is also equipped with a device for feeding the working fluid (oil) containing a feed tank 18 bypass valve filling valve
    The drive operates zom.
    I
    17, fueled by a pump 19 and ne20, a receiver 21 and 22.
    as follows40
    The throttle 12 changes the amount of lift of the valve 6. When the throttle is closed, the lift of the valve 6 is maximum.
    When the throttle 12 is open, the working fluid flows through it during the movement of the piston-sensor 2 and is directed through the pipe 11 having a soothing section into the feed tank 17. By means of the valve 13, the reverse suction of air or working liquid into the discharge pipe is prevented.
    Due to means for deaeration, reliable removal of gas bubbles and working fluid is achieved and oscillations in the hydraulic system are prevented. The implementation of the cam 3 with the occipital part, the radius of which is smaller than the radius of the main circle, and stepless transitions eliminates the possibility of vibration in the discharge pipe caused by the filling valve.
    The transitions 15 and 16 provided on the cam provide, respectively, a slow compression or expansion of the working fluid in the discharge pipe, which is necessary to open or close the gas distribution valve by overcoming the spring resistance, which also prevents oscillations.
    Thus, this embodiment of the hydraulic drive of the gas distribution valves allows to increase its reliability.
    权利要求:
    Claims (2)
    [1]
    This valve, the receiver and the filling valve, the latter not overlapping by the piston sensor in any of its positions, used oil as slabs of the liquid. The drawing shows the proposed device. The hydraulic valve timing drive comprises a drive cylinder 1, in the inner cavity of which a piston-sensor 2 is installed, interacting with a cam 3 of the camshaft, an actuating cylinder C, in the inner surface of which a piston 5 is installed that controls a spring-loaded valve 6, The drive 1 and executive k cylinders are connected by an injection pipe 7, at the top of which are placed the means for de-aerating the working fluid, made in the form unregulated throttle 8 and a separator 9 mounted behind it with an overflow pipe 10 "The drain pipe 11 is equipped with an adjustable throttle 12 and a check valve 13 installed behind the adjustable throttle, and the cam 3 is made with the occipital part, the radius of which is less than the radius of the main circle H a cam and a pump with the latter through dbccTy step transitions 1Y 15 and 16. The hydraulic drive is also equipped with a device for feeding the working fluid (oil) containing the feed tank 17, the feed pipe 18 s to osom 19 and bypass valve 20, a receiver 21 and a filling valve 22. The actuator operates as follows. I The throttle 12 changes the value of the valve side 6. When the throttle is closed, the valve 6 lift is maximum. When the throttle 12 is open, the working fluid flows through it during the movement of the piston sensor 2 and is directed through the calming pipe 11 to the feed tank 17. The valve 13 prevents the intake of air or working fluid into the discharge pipe. By means of deaeration, a reliable removal of gas bubbles from the working fluid is achieved and oscillations in the hydraulic system are prevented. Making a cam 3 with the back of the head, the radius of which is smaller than the radius of the main circumference, and stepless transitions eliminates the possibility of vibration in the injection duct. de caused by the filling valve. The cam connections 15 and 16 provided on the cam respectively provide for slower compression or expansion of the working fluid in the discharge line, which is necessary to open or close the camshaft valve by overcoming spring resistance, which also prevents oscillations from occurring. Thus, this implementation of the hydraulic valve timing mechanism allows to increase its reliability. Claim 1. Hydraulic valve timing drive for an internal combustion engine or a piston compressor, containing a drive cylinder, in the internal cavity of which a piston-sensor is installed that interacts with the cam of the camshaft, the actuating cylinder in the internal cavity of which has a piston controlling the valve, and the drive and executive the cylinders are connected by a discharge pipe, at the top of which are placed means for deaerating the working fluid communicated with the drain pipe, and a device for feeding the working fluid, characterized in that, in order to increase reliability, the means for deaerating the working fluid are made in the form of an unregulated throttle and a separator with an overflow pipe behind it, the drain pipe is equipped with an adjustable choke, and the cam is made with the occipital part, the radius of which is less than the radius of the main circle of the cam and is adjacent to the latter through stepless transitions
    [2]
    2. Drive pop, 1, cast with the fact that the drain pipe is equipped with a check valve installed behind the adjustable choke. The drive is in accordance with claim 1, in which it is provided that the feeding device comprises a charging tank, feeding pipeline with a pump and a relief valve, a receiver and a charging valve, the latter not being blocked by a piston sensor of any of its provisions. 99 Actuation according to claim 1, characterized in that oil is used as the working fluid. Sources of information taken into account in the examination of K Patent of Germany If cl. And d 9/02, pub. 1928.
    类似技术:
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    同族专利:
    公开号 | 公开日
    SE438707B|1985-04-29|
    FR2436255A1|1980-04-11|
    GB2032005B|1982-09-08|
    IT7925667D0|1979-09-12|
    JPS6315448B2|1988-04-05|
    RO78026A|1982-02-01|
    DD146076A1|1981-01-21|
    JPS5543295A|1980-03-27|
    SE7907629L|1980-03-17|
    HU180014B|1983-01-28|
    DE2840445C2|1984-10-04|
    GB2032005A|1980-04-30|
    CH642429A5|1984-04-13|
    FR2436255B1|1985-10-25|
    US4278233A|1981-07-14|
    IT1123701B|1986-04-30|
    DE2840445A1|1980-04-17|
    IN151291B|1983-03-26|
    PH17702A|1984-11-14|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2840445A|DE2840445C2|1978-09-16|1978-09-16|Hydraulic device for operating a gas exchange valve for internal combustion engines|
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