Variable valve actuation apparatus
    2.
    发明授权
    Variable valve actuation apparatus 有权
    可变气门致动装置

    公开(公告)号:US6041746A

    公开(公告)日:2000-03-28

    申请号:US208003

    申请日:1998-12-09

    IPC分类号: F01L13/00

    摘要: A variable valve actuation (VVA) apparatus comprises a supporting arm to support a pivot center of a rocker arm. The rocker arm operates a valve operating (VO) cam in response to operation of a drive cam on an engine driven drive shaft. The supporting arm is mounted for angular motion about an axis of rotation of the drive shaft to move the pivot center of the rocker arm along a circle about the drive shaft axis. The VO cam is mounted for pivot motion about the drive shaft axis. A supporting arm (SA) actuator is provided to position the pivot center of the rocker arm to any angular position to shift mode of operation of the VVA apparatus.

    摘要翻译: 可变气门致动(VVA)装置包括支撑臂以支撑摇臂的枢转中心。 响应于发动机驱动的驱动轴上的驱动凸轮的操作,摇臂操作阀操作(VO)凸轮。 支撑臂被安装成围绕驱动轴的旋转轴线进行角运动,以使摇臂的枢转中心沿着围绕驱动轴轴线的圆周移动。 VO凸轮被安装成围绕驱动轴轴线枢转运动。 提供支撑臂(SA)致动器以将摇臂的枢转中心定位到任何角度位置以移动VVA装置的操作模式。

    Variable-valve-actuation apparatus for internal combustion engine
    4.
    发明授权
    Variable-valve-actuation apparatus for internal combustion engine 有权
    用于内燃机的可变阀致动装置

    公开(公告)号:US06260523B1

    公开(公告)日:2001-07-17

    申请号:US09498031

    申请日:2000-02-04

    IPC分类号: F01L134

    CPC分类号: F01L13/0026 F01L13/0021

    摘要: In a VVA apparatus for an internal combustion engine wherein the position of contact of a cam face of a VO cam with respect to the top face of a valve lifter is changed in accordance with a change in a rocking fulcrum of a rocker arm to alter the valve lift, the maximum valve lift is obtained in a first rotated position of a control shaft where an axis of a control cam is adjacent to a driving shaft. The minimum valve lift is obtained in a second rotated position of the control shaft where the axis of the control cam is positioned near a first pivotal point of the rocker arm and a crank arm with respect to a first line connecting the axis of the control shaft and the axis of the control cam upon the maximum valve lift.

    摘要翻译: 在用于内燃机的VVA装置中,根据摇臂的摆动支点的变化,改变VO凸轮的凸轮面相对于气门挺杆的顶面的接触位置,以改变 气门升程,在控制轴的轴线与驱动轴相邻的控制轴的第一旋转位置获得最大气门升程。 在控制轴的第二旋转位置中获得最小气门升程,其中控制凸轮的轴线位于摇臂的第一枢转点附近,而曲柄臂相对于连接控制轴的轴线的第一线 和最大气门升程时控制凸轮的轴线。

    Variable valve actuator apparatus
    5.
    发明授权
    Variable valve actuator apparatus 有权
    可变阀致动器装置

    公开(公告)号:US6055949A

    公开(公告)日:2000-05-02

    申请号:US219774

    申请日:1998-12-23

    IPC分类号: F01L13/00

    CPC分类号: F01L13/0026 F01L13/0021

    摘要: A variable valve actuation (VVA) apparatus for an internal combustion engine comprises a drive cam fixed to a drive shaft, a valve operating (VO) cam supported by the drive shaft for pivotal motion, and a motion transmitting mechanism interconnecting the drive cam and the VO cam. The VO cam having a cam surface that extends at least from a cam lift start point to a maximum cam lift point. The cam surface includes a first section providing a ramp section, a second section providing a positive acceleration section, and a third section providing a zero acceleration section that includes a situation where acceleration continuously vary within a predetermined infinitesimal window about zero.

    摘要翻译: 用于内燃机的可变气门致动装置(VVA)包括固定在驱动轴上的驱动凸轮,由驱动轴支承以枢转运动的气门操作(VO)凸轮以及将驱动凸轮和 VO凸轮。 该VO凸轮具有至少从凸轮升程起点延伸到最大凸轮升程点的凸轮表面。 凸轮表面包括提供斜坡部分的第一部分,提供正加速部分的第二部分和提供零加速度部分的第三部分,其包括加速度在大约零的预定无限小窗口内连续变化的情况。

    Variable compression ratio system for internal combustion engine and method for controlling the system
    7.
    发明授权
    Variable compression ratio system for internal combustion engine and method for controlling the system 有权
    用于内燃机的可变压缩比系统和控制系统的方法

    公开(公告)号:US07059280B2

    公开(公告)日:2006-06-13

    申请号:US10692740

    申请日:2003-10-27

    IPC分类号: F02D45/00

    CPC分类号: F02D15/02 F02B75/048

    摘要: A variable compression ratio system for an internal combustion engine, including a variable compression ratio mechanism for continuously varying a compression ratio of the engine, the variable compression ratio mechanism including a control shaft rotatably moveable to a rotational position corresponding to the compression ratio, a hydraulic actuator driving the control shaft to the rotational position depending on operating conditions of the engine, a hydraulic pressure source mechanically driven by the engine to produce a hydraulic pressure supplied to the hydraulic actuator, and a hydraulic control for variably controlling the hydraulic pressure supplied to the hydraulic actuator on the basis of the engine operating conditions.

    摘要翻译: 一种用于内燃机的可变压缩比系统,包括用于连续改变发动机的压缩比的可变压缩比机构,包括可旋转地运动到与压缩比对应的旋转位置的控制轴的可变压缩比机构,液压 致动器根据发动机的运行状态将控制轴驱动到旋转位置,由发动机机械驱动的液压源,以产生供给到液压致动器的液压;以及液压控制器,用于可变地控制供给到 液压执行器在发动机运行条件的基础上。