Abstract: A low pressure fuel pump control system of a GDI engine may include a low pressure fuel pump primarily pressurizing fuel supplied from a fuel tank, a high pressure fuel pump secondarily pressurizing fuel from the low pressure fuel pump, a low pressure fuel pump pressure sensor and a high pressure fuel pump pressure sensor detecting fuel pressure of the low pressure fuel pump and the high pressure fuel pump, and a fuel supply pressure controller setting a final target pressure of the low pressure fuel pump by correcting a reference pressure, wherein the reference pressure is corrected by a low pressure correcting pressure according to temperature of the low pressure fuel pump and a correction pressure.

Abstract: 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.

Abstract: A low pressure fuel pump control system of a GDI engine may include a low pressure fuel pump primarily pressurizing fuel supplied from a fuel tank, a high pressure fuel pump secondarily pressurizing fuel from the low pressure fuel pump, a low pressure fuel pump pressure sensor and a high pressure fuel pump pressure sensor detecting fuel pressure of the low pressure fuel pump and the high pressure fuel pump, and a fuel supply pressure controller setting a final target pressure of the low pressure fuel pump by correcting a reference pressure, wherein the reference pressure is corrected by a low pressure correcting pressure according to temperature of the low pressure fuel pump and a fuel constellation correcting pressure according to a fuel constellation.

Abstract: 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.