| 摘要 |
PURPOSE:To perform smooth speed control as well as to prevent any drawbacks due to the exhaust of unburned gas caused by a ignition cut and unsuitableness in an air-fuel ratio at the initial stage of fuel feed reopening caused by a fuel cut and so on from occurring, by making the specified cylinder alone stop its fuel injection by a signal of more than the setting speed. CONSTITUTION:A controlling part 54 calculates fundamental injection time on the basis of input signals out of each of sensor groups 56-64. A signal for a running velocity V is inputted into a control circuit 68 from a car speed sensor 66. When the velocity V is less than a first setting velocity V0, stop control will not take place. When the velocity V grows larger than the first setting speed V0 and less than a second setting speed (V0+DELTAV0>V>V0), each fuel injection of injection valves 46 and 48 is stopped at a first control circuit 70. Thus, a fuel injection valve is divided into two groups and one group alone is in stopped so that any shock due to a sudden output drop does not happen. In addition, a large quantity of unburned gas like in case of an ignition cut system is no case exhausted there and, what is more, unsuitableness in an air-fuel ratio at the initial stage of fuel feed reopening like in case of a fuel cut system is also nothing at all. |
