Patent ID: 7779816
Filing Date: 2010-08-24
Classification: F02D

Abstract:
1. An open-loop and closed-loop control method for an internal combustion engine with a common rail injection system, in which a rail pressure (pCR) is subject to closed-loop control during normal operation, comprising the steps of: determining a first actual rail pressure (pCR calculating a control deviation (ep) from a set rail pressure (pCR(SL)) and the first actual rail pressure (pCR calculating a correcting variable (qV determining a PWM signal (PWM) for controlling a controlled system as a function of the correcting variable (qV determining a second actual rail pressure (pCR detecting a load reduction when the second actual rail pressure (pCR when a load reduction is detected, controlling the rail pressure (pCR) by open-loop control by setting the PWM signal (PWM) to a PWM value (PWM