| 摘要 |
PURPOSE: A device for directly injecting gas fuel using a microprocessor is provided to directly inject gas fuel to a suction manifold of a combustion engine capable of using both gas fuel and liquid fuel. CONSTITUTION: A device for directly injecting gas fuel using the microprocessor includes a high speed gas injection valve mounted at a portion near to a suction hole of an engine for directly injecting a fuel amount required when a suction valve is opened, a PWM valve(21) for injecting a full amount of fuel to a mixer, a rotary encoder for obtaining crank angle signal and allowing a crank of the engine to inject fuel based on the crank angle signal, and a sub program for calculating an amount of consumed fuel from signal obtained from a TPS(Throttle Position Sensor) and an oxygen sensor, controlling a continuous injection period of time to control the fuel amount, and blocking the fuel injection at the time of deceleration.
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