Variable displacement engine diagnostics
    9.
    发明授权
    Variable displacement engine diagnostics 有权
    可变排量发动机诊断

    公开(公告)号:US08286471B2

    公开(公告)日:2012-10-16

    申请号:US12352989

    申请日:2009-01-13

    IPC分类号: G01M15/08

    摘要: Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises indicating valve degradation based on an indication of manifold pressure over a plurality of immediately successive induction events of the engine, the indication responsive to increases and decreases in the indication of manifold pressure correlated to the induction events of engine cylinders and further correlated to whether cylinders are commanded to be activated or deactivated.

    摘要翻译: 提供了用于监测在与多个气缸阀一起操作的发动机中的气缸阀门失活的方法和系统。 一个示例性方法包括基于在发动机的多个立即连续的感应事件上的歧管压力的指示来指示阀门劣化,该指示响应于与发动机气缸的感应事件相关的歧管压力的指示的增加和减少,以及进一步相关 指示是否命令气缸被激活或停用。