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AssigneeRobert Bosch GmbH
InventorsJosef Guentert, Juergen Hammer
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A high-pressure pump for supplying fuel in a fuel injection system of an internal combustion engine, including a common rail injector system. The fuel injection system includes a low-pressure part that contains a fuel tank and a prefeed pump and a high-pressure part that contains a high-pressure pump and a common rail into which a fuel flow is fed from the high-pressure pump through a common conduit. The high-pressure pump system solves a problem in that there is an integrated demand-based quantity control for the fuel flow pumped by the high-pressure pump. The demand-based quantity control integrated with the high-pressure pump contributes to improving the overall engine efficiency, because the power consumption by the high-pressure pump drops as a result.
A high pressure pump for supplying fuel in a fuel injection system of internal combustion engines, including a common rail injection system, in which the fuel injection system comprises a low-pressure pump (2), a fuel tank (3) which supplies fuel to the low pressure pump, a high-pressure pump (1), said high pressure pump including more than one piston (6, 7, 8), a common conduit (10) into which a fuel flow is fed from each of the more than one piston of the high-pressure pump (1), said fuel injection system has an integrated demand-based multi-way quantity control valve (12) operatively connected in the common conduit (10) between the high pressure pump and the common rail for controlling the fuel flow pumped by the high-pressure pump (1) to the common rail or for returning a part of the fuel to the fuel tank.
Dependencies are inferred from the claim text.