METHOD FOR CONTROLLING FUEL OF LPG ENGINE

PROBLEM TO BE SOLVED: To suppress the discharge of unburned gas by suction of the remaining fuel in a sudden reduction in air quantity by decelerating operation by judging the decelerating operation or not, and stopping the current-carrying to an injector when the decelerating operation is judged. SOLUTION: During the operation of an LPG engine 100 having an LPG regulator 1, a slow lock solenoid valve 2, an injector 3, a venturi part 4, an air-fuel ratio control motor 5 and the like, when it is judged in an engine control computer 7 that the vehicle speed is a prescribed value (for example, 2 km/h) or less from the output of a vehicle sensor, it is judged whether a throttle switch 6 is ON or not. When ON is judged, the current-carrying to the injector 3 is stopped. It is then judged whether the engine rotating speed is larger than the cut rotating speed or not, and when YES is judged, the current-carrying to the slow lock solenoid valve 2 is stopped, and the fuel control processing of the LPG engine is then ended.