公开(公告)号：US4502444A

公开(公告)日：1985-03-05

申请号：US515695

申请日：1983-07-19

申请人： John T. Rubbo ,  Kenneth R. Burns ,  Ronald M. Heck ,  John J. Early

发明人： John T. Rubbo ,  Kenneth R. Burns ,  Ronald M. Heck ,  John J. Early

IPC分类号： F02B1/04 ,  F02D41/14 ,  F02D41/24 ,  F02B3/00

CPC分类号： F02D41/2474 ,  F02D41/2454 ,  F02B1/04 ,  F02D41/2438

摘要： A system for the control of the air-fuel ratio in an internal combustion engine incorporates an electronic control unit, a sensor of exhaust emissions and a valve for metering fuel with air to control the air-fuel ratio. The electronic control unit provides for the comparison of successive measurements of the sensor output voltage under conditions wherein the fuel valve is being operated for ever increasing richness or leaness until such time as the differential measurement drops below a predetermined amount. An offset voltage is then subtracted from or added to this voltage to calculate an operating set point voltage. Thereby, the system's accuracy is maintained through the compensation for changed sensor characteristics with aging.

摘要翻译： 用于控制内燃机中的空燃比的系统包括电子控制单元，废气排放传感器和用于用空气计量燃料以控制空燃比的阀。 电子控制单元提供了在燃料阀正在运行以增加浓度或倾斜度的条件下直到差分测量下降到预定量以下的条件下对传感器输出电压的连续测量的比较。 然后将偏移电压从该电压中减去或加到该电压上，以计算工作设定点电压。 因此，通过对变化的传感器特性随着老化的补偿来维持系统的精度。