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公开(公告)号:US20050284448A1
公开(公告)日:2005-12-29
申请号:US11153150
申请日:2005-06-15
CPC分类号: F02D33/006 , F02D41/3082 , F02D41/3836 , F02M37/0047 , F02M37/10
摘要: A fuel pump system includes a fuel pump having a direct current motor for driving a pumping element to deliver fuel to an engine at a variable rate. A pulse width modulated controller is electrically communicated with the motor for varying the speed thereof, thereby enabling the fuel pump to deliver the fuel to the engine at the variable rate. The controller includes a first switch in series with the motor and a second switch in parallel across the motor. In a motor-off cycle, control electronics connected to the switches deactivate the first switch and activate the second switch to commutate the motor. In a motor-on cycle, the control electronics deactivate the second switch and activate the first switch to power the motor.
摘要翻译: 燃料泵系统包括具有直流电动机的燃料泵,该直流电动机用于驱动泵送元件以可变速率向发动机输送燃料。 脉宽调制控制器与电动机电连通以改变其速度,从而使得燃料泵以可变速率将燃料输送到发动机。 控制器包括与电动机串联的第一开关和并联在电动机上的第二开关。 在电动关闭循环中,连接到开关的控制电子器件使第一开关断开并激活第二开关以使电动机换向。 在电机启动循环中,控制电子设备使第二个开关停用,并激活第一个开关以为电机供电。