Patent ID: 6729309
Filing Date: 2004-05-04
Classification: F02D,F02M,F04B

Abstract:
In a fuel injection system for internal combustion engines, with a high-pressure fuel pump (1), a common rail (3), and at least one injector, the high-pressure fuel pump (1) supplying fuel to the injector(s) by means of the common rail (3), with a presupply pump (19) that delivers fuel from a tank (9) to the high-pressure fuel pump (1), with a pressure control of the delivery pressure of the presupply pump (19), with a return line (27) for conveying fuel away from the injector(s) and/or from the high-pressure fuel pump (1), and with a pressure control in the return line (27), the improvement comprising control means controlling the pressure in the return line (27) as a function of the delivery pressure of the presupply pump (19).