AUTOMATIC FUEL INJECTION PRESSURE CONTROL DEVICE OF A COMMON RAIL DIESEL ENGINE AND AN AUTOMATIC FUEL INJECTION PRESSURE CONTROL METHOD USING THE SAME CAPABLE OF IMPROVING FUEL ECONOMY BY REDUCING FUEL INJECTION PRESSURE

摘要

PURPOSE: An automatic fuel injection pressure control device of a common rail diesel engine and an automatic fuel injection pressure control method using the same are provided to improve fuel economy with the prevention of oversupply of fuel by controlling a fuel pump in real time, thereby decreasing the fuel injection pressure. ;CONSTITUTION: An automatic fuel injection pressure control device(100) of a common rail diesel engine comprises: an acceleration sensor unit(110) composed of an acceleration sensor measuring the acceleration of a vehicle, and an acceleration controller receiving the measured signal by the acceleration sensor and judging whether or not the vehicle is in acceleration or deceleration, and in case of deceleration, sending out the signal to an output control unit; and an output control unit(120) receiving the signal of the acceleration sensor unit and increasing the pressure signal value of a fuel pressure sensor measuring the fuel pressure in a common rail(30), and then transmitting to an electronic control unit(40).;COPYRIGHT KIPO 2011