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    • 9. 发明授权
    • Idle control method for an internal combustion engine
    • 一种内燃机的空转控制方法
    • US4612889A
    • 1986-09-23
    • US804012
    • 1985-12-03
    • Takayuki SugiuraTakahisa Hasegawa
    • Takayuki SugiuraTakahisa Hasegawa
    • F02D41/00F02D41/08F02D41/14F02D41/16
    • F02D41/1486F02D41/08Y02T10/42
    • A method of controlling an air-fuel ratio of an air-fuel mixture for an internal combustion engine includes the steps of sensing the intake air temperature and the operating state and rotating speed of the engine using various detectors. When the intake air temperature is above a predetermined temperature, when the engine is in the idle operating state, and when its rotating speed is below a predetermined speed, the control circuit ceases a normal control in which the air-fuel ratio of the air-fuel mixture is controlled to be a value in a theoretical air-fuel ratio range, and instead controls the air-fuel ratio to be a predetermined rich air-fuel ratio. With this method, a decrease in the absolute amount of fuel supplied to the engine due to a reduction in intake air quantity in the idle operating state when the intake air temperature is high is avoided, which in turn prevents a reduction in the rotating speed of the engine and ensures stability of idling.
    • 用于控制内燃机的空气燃料混合物的空燃比的方法包括以下步骤:使用各种检测器检测发动机的进气温度和运转状态以及转速。 当进气温度高于预定温度时,当发动机处于怠速运行状态时,当其转速低于预定速度时,控制电路停止空调机的空燃比的正常控制, 将燃料混合物控制为理论空燃比范围内的值,将空燃比控制为规定的浓空燃比。 利用这种方法,避免了当进气温度高时由于空转运行状态下的进气量减少而向发动机供给的燃料的绝对量的减少,从而防止了进气旋转速度降低 发动机并确保空转的稳定性。