Brake booster vacuum sensor diagnostic
    1.
    发明授权
    Brake booster vacuum sensor diagnostic 有权
    制动助力器真空传感器诊断

    公开(公告)号:US07076347B2

    公开(公告)日:2006-07-11

    申请号:US10763629

    申请日:2004-01-23

    IPC分类号: G06F17/00 F02D17/02

    摘要: A diagnostic system for a brake booster sensor includes a monitor that monitors a maximum error and a minimum error based on a brake booster sensor signal over a monitoring period. A first comparator determines one of a pass status and a fail status of the brake booster sensor based on the maximum error and the minimum error.

    摘要翻译: 用于制动助力传感器的诊断系统包括监视器,其监视在监视周期内基于制动助力器传感器信号的最大误差和最小误差。 第一比较器基于最大误差和最小误差确定制动助力传感器的通过状态和故障状态之一。

    Secondary air injection diagnostic system using pressure feedback
    2.
    发明授权
    Secondary air injection diagnostic system using pressure feedback 失效
    二次空气注射诊断系统采用压力反馈

    公开(公告)号:US06983590B2

    公开(公告)日:2006-01-10

    申请号:US10277475

    申请日:2002-10-22

    IPC分类号: F01N3/00

    摘要: A diagnostic system according to the present invention diagnoses system failure of a secondary air injection system. The secondary air injection system includes a pump that provides air to an exhaust system via a conduit and a valve that controls the flow of air through the conduit. A pressure sensor measures pressure in the conduit. A controller predicts pressure in the conduit during first, second and third operational phases of the secondary air injection system. The controller compares the measured pressure to the predicted pressure to evaluate operation of the secondary air injection system. During the first phase, the secondary air injection system is used to reduce vehicle emissions. During the second phase, the valve is shut while the pump is on. During the third phase, the pump is turned off while the valve is closed.

    摘要翻译: 根据本发明的诊断系统诊断二次空气喷射系统的系统故障。 二次空气喷射系统包括通过导管向排气系统提供空气的泵和控制通过导管的空气流动的阀。 压力传感器测量导管中的压力。 控制器预测在二次空气喷射系统的第一,第二和第三操作阶段期间管道中的压力。 控制器将测量的压力与预测的压力进行比较,以评估二次空气喷射系统的操作。 在第一阶段,二次空气喷射系统用于减少车​​辆排放。 在第二阶段期间,当泵打开时,关闭阀门。 在第三阶段,泵关闭时关闭泵。