| 摘要 |
A method of controlling a fuel injection system and a fuel injection system are proposed for supplying fuel to an internal combustion engine with mixture compression and applied ignition. The fuel injection system comprises at least one injection valve (11) injecting fuel into the intake pipe (25) of the internal combustion engine, a fuel supply line (12) and a pressure regulating device connected to the fuel supply line (12), which device comprises a first pressure regulator (19), a second pressure regulator (44) and a control valve (23) with a solenoid (24). The inlet pipe (18) of the first pressure regulator (19) is connected to the fuel supply line (12) whilst the outlet pipe (20) lies on a return line (21) on which the control valve (23) is located. The second pressure regulator (44), which sets a higher fuel pressure than the first pressure regulator (19), is located on a bypass line (45) to the control valve (23). In the non-energised state the control valve (23) is closed so that when the internal combustion engine is running the fuel pressure is regulated by means of the second pressure regulator (44), which leads to a higher fuel pressure. The solenoid (24) is de-energised by the electronic control unit (32) not only when the internal combustion engine is shut off but also in the event of operating variables characteristic of hot starting of the internal combustion engine, in the re-start phase following a hot start and in the event of operating states characteristic of an increased fuel requirement, for example at full load. <IMAGE> |
