ISG Restarting Method for Diesel Engine Rail Pressure Control and Diesel ISG Vehicle thereof

摘要

The diesel ISG vehicle according to the present invention includes an engine ECU (Electronic Control Unit) 40 for controlling the rail pressure of the common rail engine system 1, and the engine ECU 40 is connected to an idle stop & The engine is restarted in the rapid rail pressure control mode in which the coolant temperature detected at the time of restarting the engine by Go and the detected fuel temperature is judged as the cold start of the engine and then the pressure of the fuel fed by the common rail 30 is adjusted, Or restarting the engine in the normal rail pressure control mode in which the flow rate and pressure of the fuel fed to the common rail 30 are controlled together, thereby improving the fuel economy by restarting the ISG that does not increase the driving torque of the high pressure pump. The amount of fuel injection is also reduced by reduction of the flow loss such as a compressor.