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1氧传感器的作用及原理对于使用电控燃油喷射系统的车辆,为了降低尾气排放污染,必须精确控制空燃比(始终接近14.7的理论值),从而充分发挥三元催化转化器的作用,降低排气中一氧化碳(CO)、碳氢化合物(HC)和氮氧化合物(NOx)等的含量。氧传感器的作用就是监测尾气中的氧含量并反馈给ECU,ECU根据反馈的信息判断实际空燃比的大小,继而对空燃比进行修正,从而达到精确控制空燃比的目的。氧传感器
1 The Role and Principle of Oxygen Sensor For vehicles using electronically controlled fuel injection systems, the air-fuel ratio (always close to the theoretical value of 14.7) must be precisely controlled in order to reduce exhaust emission pollution so as to give full play to the role of the three-way catalytic converter to reduce emissions Gas, carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) and other content. The function of the oxygen sensor is to monitor the oxygen content in the exhaust gas and feed it back to the ECU. The ECU judges the actual air-fuel ratio according to the feedback information, and then corrects the air-fuel ratio to achieve the precise control of the air-fuel ratio. Oxygen Sensor