Patent ID: 6895935
Filing Date: 2005-05-24
Classification: F02M

Abstract:
1. In a fuel injection system ( 1 ) having a pressure booster ( 4 ), which booster has a displaceable piston ( 6 ; 24 ; 30 ) that can be subjected to pressure via a pressure booster chamber ( 10 ) on the low-pressure side, for compressing the fuel to be delivered to an injector ( 3 ) in a pressure booster chamber ( 9 ) on the high-pressure side, the stroke of the piston ( 6 ; 24 ; 30 ) being controllable essentially by the pressure in a differential chamber ( 7 ) of the pressure booster ( 4 ) and is used to influence the fuel pressure delivered to the injector ( 3 ), the improvement comprising means ( 24 , 25 ; 28 , 31 ) for continuously variable enlargement of the inlet cross section to the pressure booster chamber on the low-pressure side of the pressure booster ( 4 ) or of the outlet cross section from the differential chamber ( 7 ) of the pressure booster ( 4 ).