Patent ID: 7200485
Filing Date: 2007-04-03
Classification: F02D

Abstract:
1. An internal combustion engine comprising: a fueling system for forcing fuel under pressure into engine combustion chambers via fuel injectors; an engine control system for controlling various aspects of engine operation including injection pressure at which fuel is injected into the engine combustion chambers by the fuel injectors; wherein the control system comprises a steady state strategy for processing certain data to develop a data value for desired steady state injection pressure based on steady state engine operation and a transient strategy for developing transient data values to account for certain transients in engine operation by processing engine speed data and data representing rate of change in at least one of engine speed and engine fueling to develop a data value, for a transient component; and wherein the control system modifies the data value for desired steady state injection pressure based on steady state engine operation by the data value for the transient component to develop a data value for a transient-modified desired injection pressure, compares the transient-modified desired injection pressure with a data value for actual injection pressure to develop a data value for an error signal, and processes the data value for the error signal through a closed-loop strategy to develop a data value for control of the injection pressure.