| 摘要 |
PURPOSE:To prevent unstable operation, gasping or the like of an engine after starting by a method wherein the value of lean air-fuel ratio correcting coefficient is increased for a predetermined period of time after starting so as to increase the amount of fuel injection, in the electronic control type fuel injection device operating the internal-combustion engine under an objective lean air-fuel ratio. CONSTITUTION:The device is provided with an operating means M1 for determining the amount of fuel injection by a fuel injection amount operating formula including the lean air-fuel ratio correcting coefficient and the internal-combustion engine M2 is operated under the objective lean air-fuel ratio. The device is also provided with a means M3 determining new lean air-fuel ratio correcting coefficient by multiplying a coefficient, attenuating in accordance with the elapse of time after starting, with the lean air-fuel ratio correcting coefficient. The desired lean air-fuel ratio is made rich for a predetermined period of time after starting the engine. The electronic control unit M4, accommodating a microcomputer, receives a detecting signal for detecting various operating conditions of the internal-combustion engine M2 from a lean sensor M5, for example, or the like and controls a fuel injection valve M6, for example, or the like. |
