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US 2008/0189025 A1Published application
Fuel Injection Device for an Internal Combustion Engine
AssigneeRobert Bosch GmbH
InventorThomas Pauer
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AssigneeRobert Bosch GmbH
InventorThomas Pauer
Estimating the term…
A fuel injection device comprising a high-pressure pump supplying a fuel to a high-pressure area in which an injector for injecting fuel into an internal combustion engine cylinder is arranged. An electric control unit for controlling fuel injection by at least one injector is provided. A pressure adjusting valve which adjusts a pressure in the high-pressure area and controls a connection between said high pressure area and a low-pressure fuel-filled area is controlled by the control unit. When the pressure adjusting valve is not controlled by the control unit it is placed in an open switching position in such a way that the connection between the high- low-pressure areas is opened, thereby preventing a gas formation in the high pressure area when the internal combustion engine is switched off and the fuel is cooled.
1-8. (canceled)
A fuel injection device for an internal combustion engine, comprising a high pressure pump that delivers fuel into a high-pressure region containing at least one injector that injects fuel into a cylinder of the engine, comprising an electric control unit that controls the fuel injection of the at least one injector, and comprising a pressure control valve operable to adjust the pressure prevailing in the high-pressure region, the pressure control valve being connected to control a connection of the high-pressure region to a fuel-filled low-pressure region and being triggered by the control unit to open a connection between the high-pressure region and the low-pressure region, and when it is not being triggered by the control unit, the pressure control valve assumes an open switched position in which the connection between the high-pressure region and the low-pressure region is open.
Dependencies are inferred from the claim text.