Patent ID: 6619263
Filing Date: 2003-09-16
Classification: F02M

Abstract:
In a fuel injection system (1; 50; 70; 80; 90; 100; 110; 120; 130; 140; 150; 160; 170) for an internal combustion engine, in which the fuel pumped by means of a high-pressure pump (2) (5) can be injected into the combustion chamber (8) of the engine at at least two different, high fuel pressures via injectors (9; 51), the improvement comprising;between the high-pressure pump (5) and the injectors (9; 51), at least one central pressure booster unit (10; 10â€²; 131; 141; 164; 164a) for all the injectors (9; 51) is provided, said central pressure booster unit is preceded by a pressure reservoir (6) and is followed by a pressure reservoir (11), wherein each injector (9; 51) is assigned a central valve unit (22; 22a; 22b) or a local valve unit (41; 72; 93; 113; 126), by means of which a switchover can be made between the two fuel pressures.