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    • 28. 发明申请
    • Default device of actuator for variable lift valve operating mechanism
    • 可变提升阀操作机构的执行器默认装置
    • US20070199530A1
    • 2007-08-30
    • US11701551
    • 2007-02-02
    • Michihisa TsutsumiShigeru Maruyama
    • Michihisa TsutsumiShigeru Maruyama
    • F01L1/34
    • F01L13/0063F01L13/0021F01L2105/00
    • In a default device of an actuator for a variable lift valve operating mechanism, in the event of failure of the actuator, a pressed portion of a lever pivotably supported on a support shaft is urged by a resilient force of a coil spring, an arm is pressed by a cam portion of the lever to rotate a control shaft in one direction to prevent valve lift from being a predetermined value or lower. The support shaft that pivotably supports the lever of a default mechanism is placed in a position offset from a rotation axis of the control shaft. Thus, as compared with the case where the support shaft is placed coaxially with the control shaft, a large urging force is input from the lever to the control shaft to reliably prevent the valve lift from being the predetermined value or lower.
    • 在用于可变提升阀操作机构的致动器的默认装置中,在致动器发生故障的情况下,可枢转地支撑在支撑轴上的杠杆的按压部分被螺旋弹簧的弹力推动,臂是 由杠杆的凸轮部分按压以使控制轴沿一个方向旋转,以防止气门升程达到预定值或更低。 可枢转地支撑默认机构的杠杆的支撑轴被放置在偏离控制轴的旋转轴线的位置。 因此,与支撑轴与控制轴同轴配置的情况相比,从杠杆向控制轴输入大的作动力,可靠地将气门升程降低到规定值以下。