| 摘要 |
PURPOSE:To control an injection to have a fixed mixture ratio at all times by a method wherein a preset quantity of fuel is supplied to a preset volume of air, regardless of the driving conditions such as an engine speed. CONSTITUTION:When an engine integrates air volume signals of intake air and the integrated value reaches a certain value, one or more pulses are generated in a voltage comparison trigger circuit 7 and with these pulses as reset pulses a capacitor in an integral circuit 6 is discharged at the same time. An injector 8 performs an ON operation in a certain time width according to the above pulses, that is, an intake air is measured in every certain volume however it may vary with loads, and a fixed quantity of fuel is injected from the injector 8 is each time with a pulse. Consequently, a mixing ratio of an intake air-fuel mixture is kept at a fixed value, regardless of the loads of the engine 1. |
