Fail safe device for temperature sensor
    1.
    发明授权
    Fail safe device for temperature sensor 失效
    用于温度传感器的失效安全装置

    公开(公告)号:US5153835A

    公开(公告)日:1992-10-06

    申请号:US498041

    申请日:1990-03-22

    IPC分类号: F01P11/16 F02D41/22

    摘要: An engine control system for controlling an engine in response to an output from a temperature sensor for detecting a coolant temperature of the engine, comprising temperature sensor output monitoring device for monitoring an output of the temperature sensor during operation of the engine, temperature sensor fail judging device for judging the temperature sensor to be failed when the temperature sensor output monitoring device does not detect for a predetermined length of time a change in output of the temperature sensor corresponding to an increase in coolant temperature while the temperature sensor is outputting a signal corresponding to the coolant temperature during the operation of the engine, and dummy signal outputting device for outputting a dummy signal corresponding to a predetermined temperature in place of an output signal from the temperature sensor when the temperature sensor is judged as failed by the temperature sensor fail judging device, which, in addition to engine control with a normal temperature sensor, can detect a malfunction of the temperature sensor due to a short circuit, an open circuit, or a resistance increase to fix the temperature sensor output, thereby providing positive engine control, and enables fixing of the engine speed to a desired value in the idle rotation speed control, suppression of an unnecessary fuel enrichment in the fuel control, and suppression of an advance in ignition timing in the ignition control.

    摘要翻译: 一种用于响应于来自用于检测发动机的冷却剂温度的温度传感器的输出来控制发动机的发动机控制系统,包括用于在发动机运转期间监测温度传感器的输出的温度传感器输出监视装置,温度传感器故障判定 当所述温度传感器输出监视装置在温度传感器输出与所述温度传感器输出对应的信号相对应的温度传感器的输出变化时,所述温度传感器输出监视装置未检测到所述温度传感器的输出变化时, 发动机运转时的冷却剂温度,以及当温度传感器被温度传感器故障判断装置判定为失败时,输出与预定温度对应的虚拟信号代替来自温度传感器的输出信号的虚拟信号输出装置 ,其中,除了发动机c 使用常温传感器进行控制,可以检测温度传感器由于短路,开路或电阻增加而导致的故障,以固定温度传感器输出,从而提供积极的发动机控制,并且能够将发动机转速固定在 怠速转速控制中的期望值,燃料控制中的不必要的燃料浓缩的抑制以及点火控制中的点火正时的提前的抑制。

    Exhaust gas cleaning device for an internal combustion engine
    3.
    发明授权
    Exhaust gas cleaning device for an internal combustion engine 失效
    用于内燃机的排气清洁装置

    公开(公告)号:US5099818A

    公开(公告)日:1992-03-31

    申请号:US555442

    申请日:1990-06-29

    IPC分类号: F02D41/14

    摘要: An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13) is disclosed. The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

    摘要翻译: PCT No.PCT / JP89 / 01130 Sec。 371日期1990年8月29日第 102(e)日期1990年8月29日PCT提交1989年10月31日PCT公布。 公开号WO90 / 05241 日本1990年5月17日。一种废气净化装置,其用于控制​​供给到配置在排气管(13)内的催化转化器(14)的内燃机(1)的空气燃料混合物的空燃比, )被公开。 基于空燃比传感器(12)的输出,空燃比围绕积分控制或比例积分反馈控制信号的中心水平振荡; 振荡的振幅和比例控制量,或者替代地,振荡的频率根据发动机的运行状态而变化。

    Exhaust gas cleaning device for an internal combustion engine
    4.
    发明授权
    Exhaust gas cleaning device for an internal combustion engine 失效
    内燃机废气净化装置

    公开(公告)号:US5311853A

    公开(公告)日:1994-05-17

    申请号:US12641

    申请日:1993-02-03

    IPC分类号: F02D41/14

    摘要: An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13). The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

    摘要翻译: 一种废气净化装置,用于控制供给到设置在排气管(13)中的催化转化器(14)的内燃机(1)的空气燃料混合物的空燃比。 基于空燃比传感器(12)的输出,空燃比围绕积分控制或比例积分反馈控制信号的中心水平振荡; 振荡的振幅和比例控制量,或者替代地,振荡的频率根据发动机的运行状态而变化。