| 摘要 |
PURPOSE:To make it possible to secure the accuracy of air-fuel ratio control by a method wherein in the method for determining the actual amount of fuel injection on the base of the basic amount of fuel injection obtained from the opening degree of a throttle valve and the rotational velocity of an engine is controlled by changing the fully closing position of the throttle valve. CONSTITUTION:An electronic fuel injection controlling device operates such that in ECU40 the basic fuel injection time obtained from the outputs of a throttle sensor 22 and a crank angle sensor 36 is corrected by the oututs of a sucked air temperature sensor 16 and an O2 sensor 32 and an injector 28 is controlled on the base of the actual fuel injection time as corrected. In this case, an idle-up device 42 adopted to change the fully closing position of the throttle valve 20 in proportion to the temperature of cooling water. The device 42 causes a stopper 78 to rotate clockwise through the action of a return spring 80 at the time of cooling the engine to thereby regulate the fully closing position of the valve 20 toward the opening side of the valve while when the heating of the engine is finished, it causes the stopper 78 to rotate against the force of the spring 80 through the expansion of a thermo-wax so as to set the fully closing position of the throttle valve at the usual closing position. |
