Purge valve detachment diagnostic systems and methods
    4.
    发明授权
    Purge valve detachment diagnostic systems and methods 有权
    清洗阀拆卸诊断系统和方法

    公开(公告)号:US09562499B2

    公开(公告)日:2017-02-07

    申请号:US14539187

    申请日:2014-11-12

    Abstract: A diagnostic system for a vehicle includes a purge valve control module that closes a purge valve. The purge valve regulates fuel vapor flow from a fuel vapor canister to an intake system of an engine. A pump control module, after the closing of the purge valve, turns on a pump that pumps fuel vapor toward the purge valve. A first pressure module, after the purge valve is closed, determines a first pressure measured using a pressure sensor located between the pump and the purge valve. A second pressure module, after the determination of the first pressure and while the pump is on, determines a second pressure measured using the pressure sensor located between the pump and the purge valve. A diagnostic module selectively diagnoses detachment of the purge valve from the intake system based on the first and second pressures.

    Abstract translation: 用于车辆的诊断系统包括关闭排气阀的排气阀控制模块。 净化阀调节从燃料蒸汽罐到发动机的进气系统的燃料蒸气流。 泵控制模块在关闭清洗阀之后,打开一个将燃料蒸汽向排气阀泵送的泵。 第一压力模块在吹扫阀关闭之后确定使用位于泵和排气阀之间的压力传感器测量的第一压力。 第二压力模块在第一压力的确定和泵打开之后确定使用位于泵和净化阀之间的压力传感器测量的第二压力。 诊断模块基于第一和第二压力选择性地诊断排气阀与进气系统的分离。

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