Patent ID: 6142120
Filing Date: 2000-11-07
Classification: F02D,F02M

Abstract:
A process for controlling an internal combustion engine having a high pressure injection, comprising the steps of:delivering fuel to a low-pressure area with a first pump;delivering the fuel from the low-pressure area to a high-pressure area with a second pump;regulating a fuel pressure of the fuel with a final controlling element and a pressure-regulating valve, the final controlling element being arranged in the low-pressure area and influencing a delivery quantity of the fuel in the low-pressure area, the pressure-regulating valve being arranged in the high-pressure area;applying a first drive signal to the final controlling element, the first drive signal being provided as a function of at least a fuel quantity to be injected; andapplying a second drive signal to the pressure-regulating valve, the second drive signal being provided as a function of a comparison between an actual pressure value and a predetermined pressure value,wherein the final controlling element effects a closed loop control of the fuel pressure, andwherein the pressure-regulating valve effects an open loop control of the fuel pressure.