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    • 2. 发明授权
    • Air-fuel ratio feedback control method for internal combustion engines
    • 内燃机空燃比反馈控制方法
    • US4878472A
    • 1989-11-07
    • US228545
    • 1988-08-04
    • Yoshitaka Hibino
    • Yoshitaka Hibino
    • F02D41/00F02D41/14
    • F02D41/1474F02D41/1482
    • A method of controlling the air-fuel ratio of a mixture being supplied to an internal combustion engine, in a feedback manner responsive to an output signal from an O.sub.2 sensor arranged in the engine exhaust system for sensing the concentration of a component in exhaust gases from the engine to produce as the output signal a normally fluctuating output signal indicative of the concentration. The air-fuel ratio is controlled to a desired value by means of at least one of proportional control applying a first correction value to correct the air-fuel ratio when the output signal changes from a rich side to a lean side or vice versa with respect to a predetermined reference value, and integral control applying a second correction value to correct the air-fuel ratio whenever a predetermined period of time elapses so long as the output signal remains on the lean side or on the rich side with respect to the predetermined reference value. A correcting amount is determined in response to the rate of change in the output signal of the O.sub.2 sensor. The second correction value is to be increased or decreased by means of the correcting amount, depending upon whether the output signal remaining on the lean side or on the rich side.
    • 一种响应于布置在发动机排气系统中的O2传感器的输出信号的反馈方式来控制供应到内燃机的混合物的空燃比的方法,用于感测排气中的组分浓度 发动机作为输出信号产生指示浓度的正常波动的输出信号。 利用第一校正值的比例控制中的至少一个将空燃比控制为期望值,以便当输出信号从富侧变为稀侧时反正空气燃料比,反之亦然,相对于 只要输出信号相对于预定的参考值保持在瘦侧或富侧,只要经过预定时间段,施加第二校正值来校正空燃比的积分控制; 值。 响应于O2传感器的输出信号的变化率来确定校正量。 取决于剩余在稀薄侧还是在富面上的输出信号,第二校正值将通过校正量而增加或减小。