Fuel injection system for internal combustion engines
AssigneeRobert Bosch GmbH
InventorHans-Christoph Magel
Life of this patent
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Abstract
A fuel injection system for internal combustion engines, having a fuel injection nozzle supplied with fuel by a high-pressure fuel source, which fuel injection nozzle has a movable nozzle piston for opening and closing injection openings, an injection nozzle high-pressure chamber, and an injection nozzle control chamber. A pressure boosting device connected between the fuel injection nozzle and the high-pressure fuel source has a movable piston, a work chamber, and a high-pressure chamber, in which a filling connection which is open for filling the high-pressure chamber when the fuel injection nozzle is closed and is itself closed when the fuel injection nozzle is open.
Claims15
1-14. (canceled)
A fuel injection system for internal combustion engines, comprising
- a fuel injection nozzle (2), which can be supplied with fuel by a high-pressure fuel source (1), the fuel injection nozzle (2) having a movable nozzle piston (3) for opening and closing injection openings (6), an injection nozzle high-pressure chamber (21), and an injection nozzle control chamber (20),
- a pressure boosting device (7) is connected between the fuel injection nozzle (2) and the high-pressure fuel source (1), the pressure boosting device (7) having a movable pressure booster piston (8), a pressure booster work chamber (11), and a pressure booster high-pressure chamber (9), and
- a filling connection (10) which is open for filling the pressure booster high-pressure chamber (9) when the fuel injection nozzle (2) is closed and is itself closed when the fuel injection nozzle (2) is open.
Dependencies are inferred from the claim text.