Patent ID: 7143747
Filing Date: 2006-12-05
Classification: F02D

Abstract:
1. A common rail fuel injection system for an internal combustion engine comprising: a high pressure pump for discharging high pressure fuel; a common rail for accumulating the high pressure fuel supplied from the high pressure pump; multiple injectors for injecting the high pressure fuel from the common rail into respective cylinders of the engine; a pressure sensor for detecting common rail fuel pressure of the high pressure fuel accumulated in the common rail; and a control unit for controlling a discharge amount of the high pressure fuel to be discharged from the high pressure pump in order that a detected fuel pressure (PCi) detected by the pressure sensor will coincide with a target fuel pressure (PC wherein the control unit comprises; a decreased amount presuming means for calculating a presumed decreased amount (PC a first determination means for directly or indirectly comparing a detected decreased amount (PC