Variable displacement engine diagnostics
    1.
    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。

    Engine control with valve operation monitoring using camshaft position sensing
    6.
    发明授权
    Engine control with valve operation monitoring using camshaft position sensing 有权
    发动机控制采用凸轮轴位置检测进行阀门运行监控

    公开(公告)号:US08249796B2

    公开(公告)日:2012-08-21

    申请号:US12877309

    申请日:2010-09-08

    摘要: A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern.

    摘要翻译: 一种用于控制以减少排量模式操作的多气缸内燃机的系统或方法,其中至少一个阀或气缸选择性地停用包括通过分析凸轮轴位置来监测阀门操作,以检测与当前气缸状态不一致的阀门操作(激活或停用) 并且响应于检测到不一致的操作来控制引擎。 可以使用凸轮轴位置来产生指示使用相对于相应曲轴位置的预期或参考齿位置的凸轮轴传感器齿偏差产生的进气/排气门升程的代理信号,并与相应的阈值进行比较。 指示气门升程的替代信号也可以通过一个或多个参考齿位置图案与测量或推断的齿位置图案的图案匹配或相关来产生。

    Coordination of variable cam timing and variable displacement engine systems
    8.
    发明授权
    Coordination of variable cam timing and variable displacement engine systems 有权
    可变凸轮定时和可变排量发动机系统的协调

    公开(公告)号:US07835848B1

    公开(公告)日:2010-11-16

    申请号:US12434377

    申请日:2009-05-01

    IPC分类号: F02D41/00 F01L9/02

    摘要: A method of controlling an engine with a first group of cylinders having selectively deactivatable cylinders valves and a variable camshaft timing actuator coupled in a hydraulic system is described. In one example, the method includes during a first mode where the first group of cylinders is activated to carry out combustion cycles, adjusting the hydraulic system with a first gain based on cam timing feedback information and/or maintaining a null position of the actuator by adjusting a control signal to the hydraulic system to within a first value range. During a second mode where the first group of cylinders is deactivated, the method includes adjusting the hydraulic system with a second gain based on cam timing feedback information, the second gain higher than the first gain and/or maintaining the null position of the actuator by adjusting the control signal to the hydraulic system to within a second value range.

    摘要翻译: 描述了一种利用具有选择性地不激活的气缸的第一组气缸控制发动机的方法,以及联接在液压系统中的可变凸轮轴正时致动器。 在一个示例中,该方法包括在第一模式中,第一组气缸被激活以执行燃烧循环,基于凸轮定时反馈信息以第一增益调节液压系统和/或通过致动器的零位置维持 将对液压系统的控制信号调整到第一值范围内。 在第一组气缸停用的第二模式中,该方法包括基于凸轮定时反馈信息以第二增益调节液压系统,第二增益高于第一增益和/或通过致动器的零位置维持 将所述液压系统的控制信号调整到第二值范围内。

    VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS
    9.
    发明申请
    VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS 有权
    可变位移发动机诊断

    公开(公告)号:US20130013165A1

    公开(公告)日:2013-01-10

    申请号:US13620036

    申请日:2012-09-14

    IPC分类号: F02D41/00

    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。