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    • 84. 发明授权
    • Cylinder combustion monitoring apparatus
    • 气缸燃烧监测仪
    • US4821194A
    • 1989-04-11
    • US917893
    • 1986-10-10
    • Yoshihisa Kawamura
    • Yoshihisa Kawamura
    • F02P11/06F02P15/00G01L23/22G01M15/08F02P5/15F02P11/00
    • G01M15/08F02P11/06F02P15/008G01L23/225
    • An apparatus for monitoring cylinder combustion in an internal combustion engine having at least one cylinder to control the engine by employing a pressure sensor sensitive to combustion pressure in the cylinder for producing a sensor signal indicative of a sensed cylinder combustion pressure level. From the sensor signal, there are extracted a knock signal in a predetermined high frequency range and a cylinder combustion pressure signal in a predetermined low frequency range. The apparatus includes an electrical circuit which provides a first indication in response to an abnormal condition of the high frequency knock signal and a second indication in response to an abnormal condition of the low frequency cylinder combustion pressure signal. The circuit provides a failure indication of the sensor signal being unreliable for use in controlling the engine in the presence of the first and/or second indications. The engine is controlled independently of the sensor signal upon occurrence of the failure indication.
    • 一种用于监测具有至少一个气缸的内燃机中的气缸燃烧的装置,用于通过使用对气缸中的燃烧压力敏感的压力传感器来控制发动机,以产生指示感测的气缸燃烧压力水平的传感器信号。 从传感器信号中,提取预定高频范围内的爆震信号和预定低频范围内的气缸燃烧压力信号。 该装置包括响应于高频爆震信号的异常状况而提供第一指示的电路,以及响应于低频气缸燃烧压力信号的异常状态的第二指示。 该电路提供了在存在第一和/或第二指示的情况下不可靠的用于控制发动机的传感器信号的故障指示。 发生故障指示时,发动机独立于传感器信号进行控制。