| 摘要 |
<p>In a fuel management system having an exhaust gas sensor located in an exhaust gas system of an internal combustion engine for controlling the fuel air ratio of the fuel mixture to the internal combustion engine, a detection system for detecting when the operating temperature of the exhaust gas sensor is within its normal operating range. In the preferred embodiment, an oxygen gas sensor having a voltage output above a first threshold level in a rich fuel mixture and a voltage output below a second threshold level in a lean fuel mixture is used for controlling the fuel air mixture to the internal combustion engine. When the oxygen gas sensor is below its normal operating temperature, the internal impedance of the sensor is such that the voltage generated by the sensor through its amplifier is extremely high. The detection system compares a timed developed output of the sensor to a temperature reference voltage and supplies a signal to enable the control function of the sensor when operating within its normal temperature range.</p> |
