Design and Evaluation on a Controller for Universal Oxygen Sensor

The universal oxygen sensor can accurately describe the concentration of the exhaust gas,which is more advantageous than the traditional oxygen sensors.Based on the working principle of universal oxygen sensor,a controller is designed for it from two aspects including hardware and software.The relationship between the output voltage and the excess air coefficient is established through benchmarks,and the application of the controller is carried out in the gas distribution system performance test table of the oxygen sensor.The application effects show that,the controller has good dynamic performance and can track the variation of excess air coefficient,and further accurately grasp the exhaust air fuel ratio,indicating a promotion potential.