owners manual Mitsubishi Eclipse

owners manual Mitsubishi Eclipse - year of production: 1995, 1996, 1997, 1998, 1999 - Mitsubishi Eclipse II technical information manual EN

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text version of content this owner's manual page from owners manual to the vehicle Mitsubishi Eclipse, year of production 1995 - 1999:

I-22 ENGINE - Control System -Upstream The input from the upstream heated oxygen sensor sensor temperature at all times allows the system tells the PCM the oxygen content of the exhaust to enter into Closed Loop operation sooner. Also, gas. Based on this input, the PCM fine tunes the it allows the system to remain in Closed Loop opera- air-fuel ratio by adjusting injector pulse width. tion during periods extended’ idle. The sensor produces from 0 to 1 volt, depending In Closed Loop operation the PCM monitors the upon the oxygen content of the exhaust gas in the inputs from the heated oxygen sensors (along with exhaust manifold. When a large amount of oxygen other inputs). In Closed Loop, the PCM adjusts injec- is present (caused by a lean air-fuel mixture), the tor pulse width based on the upstream heated oxy- sensor produces voltage as low as 0.1 volt. When gen sensor input. During Open Loop operation the there is a lesser amount of oxygen present (rich air-fuel mixture) the sensor produces a voltage asPCM ignores the inputs from both the upstream and downstream heated oxygen sensors. In Open high as 1.0 volt. By monitoring the oxygen content Loop, the PCM adjusts injector pulse width based and converting it to electrical voltage, the sensor acts as a rich-lean switch. on preprogrammed (fixed) values and inputs from other sensors. The heating element in the sensor maintains correct The upstream oxygen sensor threads into the outlet oxygen sensor temperature. Maintaining correct flange of the exhaust manifold. Downstream the downstream sensor begins to match theup- The downstream heated oxygen sensor threads stream sensor input except for a slight time delay. into the exhaust pipe at the rear of the catalytic By comparing the downstream heated oxygensen- convertor. The downstream heated oxygen sensor sor input to the input from the upstream sensor, input is used to detect catalytic convertordeteriora- the PCM calculates catalytic convertor efficiency. tion. As the convertor deteriorates, the input from _ Downstream heated = oxygen sensor 2 convertor

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year of production from: 1995

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