AIR-FUEL RATIO CONTROL DEVICE,申请号JP19870058472-传众专利搜索

AIR-FUEL RATIO CONTROL DEVICE

申请公布号：JPS63223343(A)

申请号：JP19870058472

申请日期：1987.03.12

申请公布日期：1988.09.16

申请人：

FUJI HEAVY IND LTD

发明人：MIURA KEIICHI

分类号：F02D41/10;F02D23/00;F02D41/00

主分类号：F02D41/10

摘要：PURPOSE:To enhance the output power and the rate of fuel consumption by furnishing a normal operation map, whereon the air-fuel ratio at high load is decided on the rich side, and an accelerative map whereon the same is decided on the lean side, and by making lean control of the air-fuel ratio according to the accelerative map when the exhaust gas temp. is below a set value at acceleration. CONSTITUTION:A control unit 18 to control an engine with a turbo-charger 1 is furnished with a normal operation map, whereon the air-fuel ratio at high load is decided on the rich side, and an accelerative map whereon the same is on the lean side. Into this control unit 18 output signals from such sensing means are fed as an air flow meter 11 to sense the engine operating condition, a throttle opening sensor 12, an engine revolving speed sensor 14, and an exhaust gas temp. sensor 17. In case it is sensed that it applied to acceleration at high- speed and high load and the exhaust temp. is over a set value, the air-fuel ratio is determined by the use of the above-mentioned normal operation map, and in case the exhaust temp. is below the set temp., the air-fuel ratio is determined by the use of the above-mentioned accelerative map to serve computation of the fuel injection amount.