| 摘要 |
<p>The present invention involves a system and method of compensating sensor error of a differential pressure sensor (70) on an exhaust gas recirculation passage (64) for a calculation of a flow rate of recirculated exhaust gas into a vehicle engine (12). The method includes providing data representing default output of the differential pressure sensor (70) based the coolant temperature of the engine (12) and providing a predetermined threshold deviation of the default output. The method further includes determining the engine coolant temperature and an actual idle output of the sensor, when the engine (12) is at an idle engine speed for a predetermined period of time, and calculating an actual error value of the sensor (70) based on observing the actual idle output and engine coolant temperature. The method further includes utilizing the actual error of value of calculating the flow rate of the recirculated exhaust gas into the vehicle engine (12) at off-idle conditions.</p> |
