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    • 1. 发明授权
    • Automatic speed control apparatus for controlling vehicle speed at set
speed
    • 用于以设定速度控制车速的自动速度控制装置
    • US4862367A
    • 1989-08-29
    • US154310
    • 1988-02-10
    • Tetsuya TadaMasumi NagasakaKouji IwamotoTatsuo TerataniJunji TakahashiAkira MiyazakiMasaki HitotsuyaKiyoshi Yagi
    • Tetsuya TadaMasumi NagasakaKouji IwamotoTatsuo TerataniJunji TakahashiAkira MiyazakiMasaki HitotsuyaKiyoshi Yagi
    • B60K31/06B60K31/04B60W30/00F02D29/02F02D41/00F02D41/14
    • B60K31/04B60W2510/0628B60W2710/0605
    • An automatic speed control apparatus for controlling the running speed of a vehicle at a constant set speed includes an auxiliary intake passage providing direct communication between portions of a main intake passage upstream and downstream from a throttle valve so as to bypass the throttle valve, an auxiliary intake air valve adapted for controlling the flow rate of air in the auxiliary intake passage, and a fuel supply cut-off means for suspending the supply of fuel to the engine from a moment at which a fuel supply cut-off condition is met, which requires the throttle valve to be set at the minimum opening position and the engine speed to be higher than a predetermined fuel supply cut-off engine speed, until the moment at which a predetermined fuel supply recovery condition is met. An actuator for actuating the throttle valve is controlled so as to vary the degree of opening degree of the throttle valve and enable the vehicle to run at the constant set speed. The auxiliary intake air valve is controlled in such a manner that the flow rate of air in the auxiliary intake passage is reduced before the fuel supply cut-off condition is met during motion of the vehicle under the control of the automatic driving apparatus. The rate of fuel supply to the engine has therefore been reduced before the fuel supply is actually cut-off so that the amount of change in the engine output torque and, hence, the level of shock produced by the change in the engine output torque are reduced when cut-off of the fuel supply is executed.
    • 用于以恒定的设定速度控制车辆的行驶速度的自动速度控制装置包括辅助进气通道,其在主进气道的节流阀上游和下游的部分之间直接连通,以便绕过节流阀,辅助进气通道 适于控制辅助进气通道中的空气流量的进气阀,以及用于将燃料供应暂停到发动机的燃料供应切断条件的时刻,燃料供给切断装置 需要将节流阀设定在最小打开位置,并将发动机转速设定为高于预定的燃料供给截止发动机转速,直到满足预定燃料供应恢复条件的时刻为止。 控制用于致动节流阀的致动器,以便改变节流阀的开度,并使车辆以恒定的设定速度运行。 控制辅助进气阀,使得在自动驾驶装置的控制下在车辆运动期间满足燃料供应切断条件之前,辅助进气通道中的空气流量减小。 因此,在实际切断燃料供应之前,发动机的燃料供给量已经降低,使得发动机输出转矩的变化量以及由发动机输出转矩变化产生的冲击水平是 执行燃料供应的切断时减少。