HEATER CONTROL DEVICE FOR AIR/FUEL RATIO SENSOR,申请号JP19920183459-传众专利搜索

HEATER CONTROL DEVICE FOR AIR/FUEL RATIO SENSOR

申请公布号：JPH0626384(A)

申请号：JP19920183459

申请日期：1992.07.10

申请公布日期：1994.02.01

申请人：

MITSUBISHI MOTORS CORP

发明人：INANO KATSUHARU

分类号：F02D41/14;F02D45/00;G01N27/416

主分类号：F02D41/14

摘要：PURPOSE:To provide a heater control device for air/fuel ratio sensors capable of reducing power consumption of heaters and avoiding the fail of the sensors. CONSTITUTION:A heater control device is provided with air/fuel ratio sensors 29 and 30 with sensor overheating heater 31 and 32, a heater control means 26 to control the heaters, and an air/fuel ratio control means 26 to control a target air/fuel ratio (A/F)OBJ based on air/fuel ratio A/F information when an exhaust line temperature Ext is over an air/fuel ratio feedback start temperature FBt, and sets a heater drive set temperature Wt at or below an air/fuel ratio feedback start temperature. Then, when the heater control means 26 operates the heaters when the engine temperature Wt (Et) has been detected to be over a set temperature Wts1 and an engine speed Ne has been detected to be below a set value Ns3.