Method for controlling pre-supply pressure of common rail fuel system of internal combustion engine, lying high-pressure pump against pressure side, where pre-supply pressure comprises pre-supply pump

摘要

The method involves lying a high-pressure pump (6) against a pressure side (5), where a pre-supply pressure comprises a pre-supply pump (2) and the high-pressure pump. A pulse width modulated control of an electric actuator (28) of the pre-supply pump takes place by opening and closing a pre-supply pump relay in case of an error of a power amplifier (15) or control. Independent claims are also included for the following: (1) a common rail fuel system of internal combustion engine (2) a computer program with a program code.