| 摘要 |
PURPOSE:To enhance safety and reliability of an engine by controlling the air- to-fuel ratio through opening/closing of a solenoid valve in accordance with the duty value of control pulses corrected by the atmospheric pressure value, and thereby eliminating disorder of the engine. CONSTITUTION:When an engine is in warming up or in operation with heave load, the mode is transferred to Step (4), where open loop controls except the theoretical air-to-fuel ratio control are performed. The fixed duty value C undergoes correction with water and suction temps. and the atmospheric pressure. When the atmospheric pressure is low, the duty value is increased to make correction of the air-to-fuel ratio to the lean side. Thereby proper air-to-fuel ratio is secured for the whole operating range of the engine to ensure that it operates without fear of disorder, and thus the reliability and safety with the engine will be enhanced. |
