Patent ID: 6523526
Filing Date: 2003-02-25
Classification: F02M

Abstract:
A method for operating a Diesel engine with a pump-line-nozzle fuel injection system, which includes for each individual cylinder a fuel injection nozzle supplied with fuel by a cam-driven pump, that is designed for achieving a maximum permissible injection pressure in a low engine speed range and capable of generating a triangular fuel pressure profile over the cam angle during each pump stroke, whereby fuel delivery volume increases with engine speed towards a design point, wherein an electric control valve situated in a connection to a low-pressure side controls the pressure of the fuel supplied to the fuel injection nozzle, and wherein the delivery pressure corresponding to the design point of said all cam-driven pump is above a maximum permissible injection pressure, said method comprising the step of operating said electronic control valve so as release fuel at the beginning of the fuel compression stroke to configure the pressure profile over the engine speed for a particular engine operating point below the maximum permissible injection pressure of the system.