Apparatus for controlling a pressure in a fuel inflow line

Details Apparatus for controlling a pressure in a fuel inflow line Apparatus for controlling a pressure in a fuel inflow line

2007-02-20

2007-02-20

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

C123S510000

Reexamination Certificate

active

11040677

ABSTRACT:
In an apparatus (12) for controlling a pressure in a fuel inflow line of a motor vehicle, a shutoff valve (20) and a pressure limiting valve (21) are arranged in a connection (19). The connection (19) is arranged between an inflow junction (16) which leads to the inflow line and an outflow junction (17) which is led into a fuel container. The pressure limiting valve (21) opens above a first pressure and throttles the flow of the fuel through the connection (19). The shutoff valve (20) closes above a second pressure, the second pressure being higher than the first pressure. This ensures that, when a fuel delivery unit is at a standstill, the pressure in the inflow line does not exceed the first pressure and that, during operation of the delivery unit, the pressure in the inflow line can rise above the second pressure and an internal combustion engine of the motor vehicle is supplied sufficiently with fuel.

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