METHOD AND SYSTEM FOR CONTROLLING LOW PRESSURE FUEL PUMP OF GASOLINE DIRECT INJECTION ENGINE

摘要

A method of controlling a low pressure fuel pump of a gasoline direct injection (GDI) engine includes receiving failure related information of a high pressure fuel pump, boosting, if the high pressure fuel pump is failed based on the failure related information of the high pressure fuel pump, a fuel pressure of the low pressure fuel pump to a setting pressure and controlling, if the high pressure fuel pump is not failed, the fuel pressure of the low pressure fuel pump based on a measured fuel pressure with respect to a target fuel pressure of the high pressure fuel pump or a change of a control value of the GDI engine. A corresponding control system includes a fuel supply pressure controller, among other components, which is operated by a predetermined program for executing the method of controlling the low pressure fuel pump of the GDI engine.

主权项

1. A method of controlling a low pressure fuel pump of a gasoline direct injection (GDI) engine, wherein the GDI engine comprises a low pressure system having a low pressure fuel pump and a high pressure system having a high pressure fuel pump, wherein a fuel primarily compressed in the low pressure system is secondarily compressed in the high pressure system and injected to a combustion chamber through an injector, the method comprising:
receiving an input of failure related information of the high pressure fuel pump; boosting, if the high pressure fuel pump is failed based on the failure related information of the high pressure fuel pump, a fuel pressure of the low pressure fuel pump to a first setting pressure; and controlling, if the high pressure fuel pump is not failed, the fuel pressure of the low pressure fuel pump based on a measured fuel pressure with respect to a target fuel pressure of the high pressure fuel pump or a change of a control value of the GDI engine.