Fluid conveying device for use in fluid injection system of motor vehicle, has valves connected with feed pump, reservoir and pressure line and closing suction line in back suction position in fluid tight manner

摘要

The device (1) has valves (100, 200) reversed between a conveying position and a back suction position and connected with a feed pump (8), a reservoir (2) and a pressure line (10). Fluid (4) is received through a suction line (6) from the reservoir during operation of the pump in the conveying position and is output into the pressure line. The fluid is conveyed from the pressure line into the reservoir in the back suction position without reversing a conveyance direction of the pump. The valves close the suction line in the back suction position in a fluid tight manner. An independent claim is also included for a method for discharging a pressure line of a fluid conveying device.