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US 6,655,355 B2Granted
Fuel injection system
AssigneeRobert Bosch GmbH
InventorsMartin Kropp, Hans-Christoph Magel
Life of this patent
Estimating the term…
Abstract
In a pressure-controlled fuel injection system, a nozzle needle is subjected to pressure in the closing direction by a nozzle spring. A nozzle chamber for opening the nozzle needle is connectable to a pressure reservoir via a pressure line. A hydraulic device is embodied to reinforce the closing performance of the nozzle needle. As a result, a faster closing performance of the nozzle needle is achieved.
Claims10
A pressure-controlled fuel injection system (18;
- 22;
- 25;
- 35;
- 37), comprising a nozzle needle (12) which is subjected to pressure in the closing direction by a nozzle spring (21), in which for opening of the nozzle needle (12) a nozzle chamber is connectable via a pressure line (10) to a pressure reservoir (6), and a hydraulic device for reinforcing the closing performance of the nozzle needle (12), wherein the pressure line (10) includes a pressure booster (23).
1 more element
A fuel injection system (18;
- 22;
- 25;
- 35;
- 37), comprising a nozzle needle (12) which is subjected to pressure in the closing direction by a nozzle spring (21), in which for opening of the nozzle needle (12) a nozzle chamber is connectable via a pressure line (10) to a pressure reservoir (6), and a hydraulic device for reinforcing the closing performance of the nozzle needle (12), wherein the pressure line (10) includes a pressure booster (23), and wherein further the pressure chamber (31) is connectable to the pressure reservoir (6) via a pressure line (36) that includes a valve (32).
1 more element
A fuel injection system (18;
- 22;
- 25;
- 35;
- 37), comprising a nozzle needle (12) which is subjected to pressure in the closing direction by a nozzle spring (21), in which for opening of the nozzle needle (12) a nozzle chamber is connectable via a pressure line (10) to a pressure reservoir (6), and a hydraulic device for reinforcing the closing performance of the nozzle needle (12), wherein the pressure line (10) includes a pressure booster (23), further comprising a metering valve (26) operable to control the imposition of pressure on the pressure chamber (31) for performing the fuel injection.
1 more element
Dependencies are inferred from the claim text.