System for detecting combustion state in internal combustion engine
    3.
    发明授权
    System for detecting combustion state in internal combustion engine 失效
    用于检测内燃机燃烧状态的系统

    公开(公告)号:US5339245A

    公开(公告)日:1994-08-16

    申请号:US812109

    申请日:1991-12-23

    摘要: A combustion state detecting system for an internal combustion engine which is equipped with a combustion state detector for detecting a combustion state of said engine. The system also includes an amplifier having a plurality of amplification factors to amplify or attenuate a combustion signal obtained by the combustion state detector, the amplification factor of the amplifier being arranged to be switchable plural times on the basis of a detection result of the combustion state detector within a predetermined time period of a combustion cycle of the engine. The decision of the combustion state of the engine is made on the basis of an output of the amplifier generated within the predetermined time period. This arrangement allows an A/D converter to input a signal having as great as possible without overflow to improve the detection accuracy of the combustion state of the engine.

    摘要翻译: 一种用于内燃机的燃烧状态检测系统,其配备有用于检测所述发动机的燃烧状态的燃烧状态检测器。 该系统还包括具有多个放大因子的放大器,用于放大或衰减由燃烧状态检测器获得的燃烧信号,放大器的放大系数被布置为可根据燃烧状态的检测结果多次切换 在发动机的燃烧循环的预定时间段内检测器。 基于在预定时间段内产生的放大器的输出来进行发动机的燃烧状态的判定。 这种布置允许A / D转换器输入尽可能大的信号而没有溢出以提高发动机的燃烧状态的检测精度。

    Malfunction diagnosis device for engine speed controller
    4.
    发明授权
    Malfunction diagnosis device for engine speed controller 失效
    发动机转速控制器故障诊断装置

    公开(公告)号:US5701866A

    公开(公告)日:1997-12-30

    申请号:US771291

    申请日:1996-12-20

    摘要: To appropriately detect malfunction of an air quantity adjusting valve in any type of case, an electronic control type throttle valve is disposed in an air intake pipe of an engine. An ISC valve which is duty controlled by an ECU is disposed in a bypass passage which bypasses the throttle valve. A CPU within the ECU establishes a drive duty ratio of the ISC valve to control engine speed in a target speed region during idling of the engine. Additionally, in a case where the drive duty ratio exceeds a predetermined control range (0 to 100%), the CPU controls idle speed by the throttle valve. Accordingly, in a case where throttle aperture is larger than a predetermined value TAH, or in a case where throttle aperture is smaller than a predetermined value TAL (where TAH>TAL), the CPU determines that an opening side malfunction or a closing side malfunction has occurred in the ISC valve.

    摘要翻译: 为了适当地检测任何类型情况下的空气量调节阀的故障,电子控制型节流阀设置在发动机的进气管内。 由ECU负责控制的ISC阀设置在旁通节气门的旁路通路中。 ECU内的CPU建立ISC阀的驱动占空比,以控制发动机怠速期间目标速度区域内的发动机转速。 此外,在驱动占空比超过预定控制范围(0〜100%)的情况下,CPU通过节流阀来控制怠速。 因此,在节气门开度大于预定值TAH的情况下,或者在节气门开度小于规定值TAL(TAH> TAL)的情况下,CPU判断为开路侧故障或关闭侧故障 发生在ISC阀门。

    Knock control system for internal combustion engine
    5.
    发明授权
    Knock control system for internal combustion engine 失效
    内燃机爆震控制系统

    公开(公告)号:US4993387A

    公开(公告)日:1991-02-19

    申请号:US366509

    申请日:1989-06-13

    IPC分类号: F02P5/152 G01L23/22

    摘要: A knock control system for the internal combustion engine is disclosed in which a knock intensity value V is detected from a signal produced by a knock sensor, a cumulative percentage point V.sub.P of distribution of a substantially logarithmic conversion value of the knock intensity value V is detected, a value S corresponding to the standard deviation of the substantially logarithmic conversion value is detected, and a knock decision level V.sub.KD is prepared on the basis of V.sub.P and S, thereby controlling knock control factors such as ignition timing and air-fuel ratio. The control system further comprises a device for deciding whether a predetermined period has passed after the engine enters specified operating conditions, a device for averaging knock intensity values, and an update quantity setting device for increasing the unit quantity of updating the averaging device and/or the cumulative percentage point detection device only while the predetermined period has not passed.