Patent ID: 7007670
Filing Date: 2006-03-07
Classification: F02D,F02M

Abstract:
1. An operation control method using a fuel injection device, comprising: pressurizing fuel from a fuel tank using a high-pressure pump so that the pressurized fuel is stored in a common rail; supplying the pressurized fuel stored in the common rail to an injection nozzle connected to the common rail; and controlling the pressure of the pressurized fuel stored in the common rail by using a low-pressure control solenoid valve upstream of the high-pressure pump, and by using a high-pressure control solenoid valve downstream of the high-pressure pump, the low-pressure control solenoid valve and the high-pressure control solenoid valve being selectively feedback-controlled to control the pressure of the pressurized fuel stored in the common rail; wherein, when a pressure in the common rail exceeds a predetermined value and the high-pressure control solenoid valve is being used to control the pressure of the pressurized fuel stored in the common rail, said controlling comprises: