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    Method of controlling the air-fuel ratio in an internal combustion engine
    1.
    发明授权
    Method of controlling the air-fuel ratio in an internal combustion engine 失效
    控制内燃机的空燃比的方法

    公开(公告)号：US5168701A

    公开(公告)日：1992-12-08

    申请号：US674162

    申请日：1991-03-25

    申请人： Toshio Yamamoto ,  Katsuyuki Kajitani ,  Youichi Iwakura

    发明人： Toshio Yamamoto ,  Katsuyuki Kajitani ,  Youichi Iwakura

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1441 ,  F02D41/2445 ,  F02D41/2454 ,  F02D41/2477 ,  F02D41/2483

    摘要： This invention relates to a method of controlling the air-fuel ratio of an internal combustion engine having a main 0.sub.2 sensor and a subsidiary O.sub.2 sensor provided upstream and downstream, respectively, of a catalyst converter for detecting the oxygen concentration of the exhaust gas of the engine. The method comprises: feedback-controlling the air-fuel ratio of a mixture gas to be supplied to the engine to about a stoichiometric air-fuel ratio having the highest purification efficiency of the exhaust gas by adjusting the amount of fuel to be supplied by an injector in accordance with the output signal from the main O.sub.2 sensor; and also feedback-controlling more precisely the air-fuel ratio of the mixture gas to about the stoichiometric air-fuel ratio by adjusting the amount of fuel supply in accordance with the output signal of the subsidiary O.sub.2 sensor. The feedback control value set for adjusting the amount of fuel supply in accordance with the output signal of the subsidiary O.sub.2 sensor is usually increased or decreased by a predetermined value. When a change of the air-fuel ratio from the rich to the lean side or from the lean to the rich side is detected by the output signal of the subsidiary O.sub.2 sensor, the feedback control value is increased or decreased by a skip amount.

    摘要翻译： 本发明涉及一种控制内燃机的空燃比的方法，所述内燃机具有分别设置在上游和下游的主O2传感器和辅助O2传感器，所述催化转化器用于检测所述废气的氧气浓度 发动机。 该方法包括：通过调节供给到发动机的燃料的量来反馈控制要供给到发动机的混合气体的空燃比至具有最高净化效率的化学计量空燃比 注射器根据来自主O2传感器的输出信号; 并且还通过根据辅助O 2传感器的输出信号调节燃料供给量，更准确地将混合气体的空燃比反馈控制到约理论空燃比。 用于根据辅助O 2传感器的输出信号调整燃料供给量的反馈控制值通常增加或减少预定值。 当通过辅助O 2传感器的输出信号来检测空燃比从浓向瘦侧或从贫侧变化到浓侧时，反馈控制值增加或减少跳跃量。

    Throttle valve opening detecting device
    2.
    发明授权
    Throttle valve opening detecting device 失效
    节气门开阀检测装置

    公开(公告)号：US6070458A

    公开(公告)日：2000-06-06

    申请号：US974152

    申请日：1997-11-19

    申请人： Hideaki Nawa ,  Sadao Takaki ,  Katsuyuki Kajitani ,  Atsushi Ito ,  Haruhiko Nishino ,  Masao Takeda

    发明人： Hideaki Nawa ,  Sadao Takaki ,  Katsuyuki Kajitani ,  Atsushi Ito ,  Haruhiko Nishino ,  Masao Takeda

    IPC分类号： G01B7/30 ,  F02D9/00 ,  F02D9/02 ,  F02D11/10 ,  F02D45/00 ,  G01B21/22 ,  G01M15/00

    CPC分类号： F02D11/106

    摘要： According to the device of the invention, measured values (V.sub.0 ', V') of an output V.sub.A of an opening sensor at two adjusted levels of throttle openings in both idling state and fast idling state and their ideal values (V.sub.0, V) are used. The value V.sub.0 ' in the idling state is subtracted from the output V.sub.A in a driving condition, (V.sub.A -V.sub.0 '), which is then multiplied by the ratio of ideal variation characteristics of the sensor output for a change of the throttle opening to those in the throttle valve product used, {(V-V.sub.0)/(V'-V.sub.0 ')}, to produce a correction signal T.sub.A matching the individual difference. Further, a reference value subtracted from the output V.sub.A in a driving condition is set as T.sub.AMIN which varies with the output V.sub.A, taking the difference of variation characteristics of the sensor output from ideal characteristics into account.

    摘要翻译： 根据本发明的装置，在怠速状态和快速怠速状态下的两个调节节气门开度的开度传感器的输出VA和它们的理想值（V0，V）的测量值（V0'，V'）分别为 用过的。 在驱动条件（VA-V0'）中从输出VA中减去怠速状态下的值V0'，然后乘以传感器输出的理想变化特性与节气门开度变化的比值 在所使用的节流阀产品{（V-V0）/（V'-V0'）}中，产生与各个差相匹配的校正信号TA。 此外，考虑到传感器输出与理想特性的变化特性的差异，将在驱动条件下从输出VA减去的参考值设置为随输出VA变化的TAMIN。