【摘要】 根据点燃式发动机排气中的氧含量推导了计算进入发动机缸内混合气空燃比的公式 ,分析了排气中氧含量的测量误差及燃料组成对空燃比测量误差的影响 ,并把理论公式的计算值与加热式氧传感器空燃比仪的测量值进行了比较 ,结果表明两者非常吻合。另外 ,加热式氧传感器空燃比仪在试验用点燃式发动机上的测量结果表明 ,试验用发动机的空燃比变化范围在± 1个空燃比单位内更多还原

【Abstract】 The equation,which is to calculate the air fuel ratio of the mixture according to the oxygen fraction of the exhaust gas,is deduced in this paper.The effects of measuring error of oxygen and the component of the fuel on the air fuel ratio are analyzed.The theoretic value according to the equation is compared with the measured value using the heated oxygen sensor.The result proves that theoretic value is coincident with the measured value well.In addition,the application of the heated oxygen sensor to the experimental spark ignition engine shows that the air fuel ratio of the experimental engine varies within ±1.更多还原