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AssigneeRobert Bosch GmbH
InventorsWolfgang Gabauer, Dieter Schreckenberger, Tony Wheeler
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Fuel pumping apparatus having an impoundment container, disposed in a tank, in which impoundment container a pumping assembly is disposed that pumps fuel to the internal combustion engine. A jet pump is supplied with some of the fuel pumped by the pumping assembly and pumps fuel out of the tank into the impoundment container. Below the pumping assembly, near a bottom of the impoundment container, there is a suction chamber, from which the pumping assembly aspirates fuel. A connection of the suction chamber to the impoundment container is controlled by a float valve, disposed laterally next to the pumping assembly, and by means of this valve, when the impoundment container is full, the suction chamber communicates with the impoundment container; in this state, the pumping assembly aspirates fuel from the impoundment container. A connection of the suction chamber to the tank is controlled by a check valve, which is disposed on the bottom of the impoundment container and by which the suction chamber communicates with the tank when the impoundment container is empty; in this state, the pumping assembly aspirates fuel from the tank.
An apparatus for pumping fuel from a tank to an internal combustion engine of a motor vehicle, comprising an impoundment container (14) disposed in the tank (10), a pumping assembly (24) disposed in the impoundment chamber for pumping fuel to the engine (12), having a jet pump (60) to which a portion of the fuel pumped by the pumping assembly (24) is delivered and which pumps fuel out of the tank (10) into the impoundment container (14), a suction chamber disposed under the pumping assembly (24) near a bottom (18) of the impoundment container (14) and from which suction chamber the pumping assembly (24) aspirates fuel, and a valve assembly (42, 60), by way of which, when the impoundment container (14) is full, the suction chamber (34) communicates with it and is disconnected from the tank (10), so that the pumping assembly (24) aspirates fuel from the impoundment container (14), and by way of which when the impoundment container (14) is empty, the suction chamber (34) communicates with the tank (10) and is disconnected from the impoundment container (14), so that the pumping assembly (24) aspirates fuel from the tank (10), the valve assembly having a float valve (42), which controls the connection of the suction chamber (34) to the impoundment container (14) and is disposed laterally next to the pumping assembly (24), and a check valve (52), which controls the connection of the suction chamber (34) to the tank (10) and is disposed on the bottom (18) of the impoundment container (14).
Dependencies are inferred from the claim text.