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186 条记录 (耗时 0.018 秒)

    CAM AND CAM FOLLOWERS FOR ENGINES
    1.
    发明公开
    CAM AND CAM FOLLOWERS FOR ENGINES 审中-公开
    凸轮和CAM福尔杰用于内燃机

    公开(公告)号：EP1157192A4

    公开(公告)日：2002-11-13

    申请号：EP99901507

    申请日：1999-01-19

    申请人： DARUT PTY LTD

    发明人： COOMBS BARRY WALLACE

    IPC分类号： F01L1/04 ,  F01L1/08 ,  F01L1/14 ,  F01L1/34 ,  F01L13/00 ,  F01L31/16 ,  F01L31/22 ,  F01L31/24 ,  F02D13/02 ,  F16H53/02

    摘要： A cam shaft assembly (50), which engages a plurality of cam followers (51) which operate valves (52) of an internal combustion engine. The cam shaft assembly (50) has a rotatably driven central shaft (56) to which a first cam lobe (57) is attached. An outer tubular shaft (58) has attached to it a further lobe (59). The shafts (56 and 58) are angularly displaceable to angularly displace the lobes (57 and 59) to alter valve timing and dwell angle.

    Valve gear for internal combustion engines
    7.
    发明公开
    Valve gear for internal combustion engines 失效
    内燃机用阀门

    公开(公告)号：EP0472430A3

    公开(公告)日：1992-05-27

    申请号：EP91307740.0

    申请日：1991-08-22

    申请人： RICARDO CONSULTING ENGINEERS LIMITED

    发明人： Norris, Robert David

    IPC分类号： F01L31/22 ,  F01L1/08 ,  F01L1/14

    CPC分类号： F01L1/08 ,  F01L1/143 ,  F01L13/0047

    摘要： Valve gear for an internal combustion engine includes a first cam (15) mounted to rotate about a first axis, a second cam (21) mounted to rotate about a second axis which is substantially parallel to the first axis, a phase-change mechanism arranged selectively to vary the phase of one of the cams relative to the other, a valve member (29) movable along a valve axis (30), a spring urging the valve member in a first direction along the valve axis and a cam follower (25) which has first and second contact surfaces (18,24) arranged to be engaged by the first and second cams, respectively, and is arranged to transmit movement from the cams to the valve member but is movable with respect to the valve member. The profile of the first cam (15) includes an ascending portion (202) to move the valve member (29) in a second direction opposite to the first direction and a descending ramp (203) to control movement of the cam follower with respect to the valve member. The profile of the second cam (21) includes a descending portion (200) to control movement of the valve member in the first direction and an ascending ramp (201) to control movement of the cam follower with respect to the valve member. The gradient of the ascending ramp (201) and of the descending ramp (203) are substantially the same over at least part of their length. The phase of the two cams is such that the times for which the ascending and descending ramps contact the follower at least partially overlap at a time during which the valve member is stationary in the closed position. This means that the cam follower moves with respect to the valve member and that the cams remain substantially in contact with the cam follower at all times.

    Valve actuating mechanism in four-stroke cycle engine
    9.
    发明公开
    Valve actuating mechanism in four-stroke cycle engine 失效
    VentilantriebsvorrichtungfürViertaktbrennkraftmaschine。

    公开(公告)号：EP0450332A1

    公开(公告)日：1991-10-09

    申请号：EP91103417.1

    申请日：1991-03-06

    申请人： SUZUKI KABUSHIKI KAISHA

    发明人： Shinkai, Tatsuya ,  Suzuki, Kazuhiko ,  Yokogi, Younosuke

    IPC分类号： F01L1/26 ,  F01L31/22

    CPC分类号： F01L13/0036 ,  F01L1/267 ,  F01L13/0026 ,  F02B2075/027

    摘要： A valve actuating mechanism is disposed in a four-stroke cycle engine comprises a rotatable rocker shaft (11) having eccentric large-diameter portions formed as bushings (12,13) on the way of the rocker shaft, a rocker arm assembly including a first rocker arm (7) rotatably mounted directly on the rocker shaft (11) and second and third rocker arms (8,9) rotatably mounted on the eccentric bushings of the rocker shaft with the first rocker arm being interposed therebetween, and a cam assembly including first, second and third cam members (3,4,5) which drives the first, second and third rocker arms, (7,8,9) respectively. The first rocker arm is provided with a branched distal end and the second and third rocker arms each is provided with a distal end which are laid upon each other. The second and third cams have the same cam profiles and the first cam has a cam profile different from those of the second and third cams. A play adjusting screw means (33,34) is provided for either one of the support portion of the first rocker arm and the support portions of the second and third rocker arms and a screw means receiving portion is provided for other one of the suportion of the first rocker arm and the support portions of the second and third rocker arms in a manner such that a clearance between a distal end of the play adjusting means and the screw receiving portion is adjusted.

    摘要翻译： 阀驱动机构设置在四冲程循环发动机中，该发动机包括：旋转摇臂轴（11），其具有形成为在所述摇臂轴上的衬套（12,13）上的偏心大直径部分;摇臂组件，包括第一 可旋转地安装在摇臂轴（11）上的摇臂（7）和可旋转地安装在摇臂轴的偏心衬套上的第二和第三摇臂（8,9），第一摇臂插入其间;凸轮组件，包括 分别驱动第一，第二和第三摇臂（7,8,9）的第一，第二和第三凸轮构件（3,4,5）。 第一摇臂设置有分支的远端，并且第二和第三摇臂各自设置有彼此相对放置的远端。 第二和第三凸轮具有相同的凸轮轮廓，并且第一凸轮具有不同于第二和第三凸轮的凸轮轮廓。 为第一摇臂的支撑部分和第二和第三摇臂的支撑部分中的任一个设置游隙调节螺钉装置（33,34），并且为第二摇臂和第三摇臂的支撑部分提供螺钉装置接收部分 第一摇臂和第二和第三摇臂的支撑部分以使得调节调节装置的远端和螺钉接收部分之间的间隙的方式。

    VARIABLE ACTUATOR FOR A VALVE
    10.
    发明授权
    VARIABLE ACTUATOR FOR A VALVE 失效
    阀门可变执行器

    公开(公告)号：EP0309468B1

    公开(公告)日：1991-06-12

    申请号：EP87903892.5

    申请日：1987-06-12

    申请人： UNIVERSITY OF BATH

    发明人： CHARLTON, Stephen, John ,  BELL, David, John ,  HOWARD, Peter, Charles ,  HAINES, Andrew, John ,  BIRD, Stuart, Lawrence

    IPC分类号： F01L9/02 ,  F01L1/16 ,  F01L31/22

    CPC分类号： F01L13/0031 ,  F01L1/16 ,  F01L9/02

    摘要： A valve actuator such as an hydraulic tappet. In one embodiment the tappet comprises a cylinder (16) which defines by means of a central wall (17), upper and lower chambers (18, 19). These have respective pistons (20 and 21). Piston (20) is connected to an actuator rod (13) of a valve (11), whilst piston (21) rides on a cam (23). The central wall is formed with two flow paths (24 and 25). The first allows oil to flow from the chamber (19) to the chamber (18) during upward movement of the piston (21) and hence the cam can cause lifting movement of the piston (20) and opening of the valve (11). As the cam (23) falls away the valve (11) closes under the action of spring (14) which results in downward movement of the upper piston (20). The rate of this return is dictated by the rate at which oil can flow through the passage (25) which can be variably restricted by control element (27). Thus, by adjustment of the control element (27) the rate of closing of the valve (11) can be varied. Other embodiments are described but in each the return movement of the upper piston (20) is variably damped.