Fuel injection device for a combustion engine
AssigneeRobert Bosch GmbH
InventorGerhard Geyer
Life of this patent
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Abstract
The fuel injection device has a fuel-supply pump (10) that delivers fuel from a fuel tank (12) to a high-pressure pump (18), wherein the high-pressure pump (18) delivers fuel to a reservoir (24), which is connected to at least one injector (26) that injects fuel into the internal combustion engine. A fuel filter (20) is disposed between the fuel-supply pump (10) and the high-pressure pump (18), wherein a return (60) for fuel from the at least one injector (26) and/or from the reservoir (24) to a low-pressure region is provided. The return (60) is provided with an additional fuel filter (62) and downstream of the fuel filter (20), the return (60) feeds into the connection (16) between the fuel-supply pump (10) and the high-pressure pump (18).
Claims5
A fuel injection device for an internal combustion engine, having a fuel-supply pump (10) that delivers fuel from a fuel tank (12) to a high-pressure pump (18), wherein the high-pressure pump (18) delivers fuel to a reservoir (24), which is connected to at least one injector (26) that injects fuel into the internal combustion engine, having a fuel filter (20) disposed between the fuel-supply pump (10) and the high-pressure pump (18), wherein a return (60) for fuel from the at least one injector (26) and/or from the reservoir (24) to a low-pressure region is provided, characterized in that the return (60) is provided with an additional fuel filter (62) and that downstream of the fuel filter (20), the return (60) feeds into the connection (16) between the fuel-supply pump (10) and the high-pressure pump (18).
The fuel injection device according to one of the preceding claims, characterized in that the return (60) contains a fuel cooler, which function is preferably performed by the additional fuel filter (62).
Dependencies are inferred from the claim text.