| 摘要 |
PURPOSE: A device for controlling an air-fuel ratio is provided to reduce hydrocarbon in the exhaust gas by forcibly feeding external air to a combustion chamber in the last stage of an explosion stroke and then generating a swirl, and accelerating a complete combustion. CONSTITUTION: A crank angle sensor(8) senses the position of a crank angle. An ECU(7) receives a signal from the crank angle sensor, and outputs a control signal to open an injection nozzle(6) in the last stage of an explosion stroke. The injection nozzle is opened/closed by the control signal of the ECU, and feeds high pressure air from an air compressor(15) to a check valve(9). The air compressor feeds the high pressure air to the injection nozzle through an air line(5). The air line is connected to a combustion chamber(3) through the air compressor and the injection nozzle, and feeds fuel to the combustion chamber. The check valve is installed on the air line and is operated by the pressure of air, and opens/closes an inlet.
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