| 摘要 |
System for determining a gas concentration comprises a sensor which has a pump cell for removing or receiving oxygen in a gas, a sensor cell for determining the concentration of a specific gas component in the gas and a monitoring cell for determining the oxygen concentration. System for determining a gas concentration comprises a sensor (100), an exhaust gas purification unit arranged in an exhaust gas passage of an I.C. engine, and a gas concentration determining unit. The sensor has a pump cell (110) for removing or receiving oxygen in a gas, a sensor cell (130) for determining the concentration of a specific gas component in the gas, and a monitoring cell (120) for determining the oxygen concentration. During a time period in which the exhaust gas is fed to the sensor, the atmosphere changes from lean to rich. Preferred Features: The gas concentration determining unit produces the obtained acquired value, produces an estimated predicted value or stops a release function during the time period. The sensor further contains a lambda-cell for releasing an electromotive force acting on the concentration of oxygen in the chamber. |
