| 摘要 |
PURPOSE:To save fuel consumption while improving driveability by stopping the direction of fuel cut while injecting fuel from a fuel injector to determine the injection amount according to the reduction ratio of rotational frequency of an engine. CONSTITUTION:In step 104 is determined fuel injection time TAU in fuel cut return. The larger the reduction rate DELTANe of rotational frequency 41 of an engine becomes, the longer the fuel injection time TAU gets and the air fuel ratio in fuel cut return is adapted to approach the maximum output air fuel ratio. In step 105 is opened a fuel injector 10 to inject LP gas into an intake path 4. In step 106 is set a flag F2 to 1 and fuel injection is carried out by the fuel injector 10 only once in the fuel cut return. Thus, the fuel consumption is saved while driveability is improved.
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