Patent ID: 6850832
Filing Date: 2005-02-01
Classification: F02D,G05B,Y02T

Abstract:
1. An internal combustion engine comprising: a fuel system that applies injection control pressure (ICP) to fuel injectors to force fuel into combustion chambers; and a control system for setting ICP in accordance with data developed by a processor of the control system wherein, the control system comprises a map that provides a schedule that correlates data values of closed-loop gain with data values for certain operating conditions, and the processor comprises a control strategy a) for processing data values of various parameters to develop a data value representing a desired ICP set-point, b) for processing the desired ICP set-point data value and a data value representing actual ICP to develop an ICP error data value for closed-loop control of actual ICP, c) for selecting a data value of closed-loop gain from the map based on the data values of certain operating conditions obtained from measurements of those operating conditions, d) for processing both the selected data value of closed-loop gain and the ICP error data value to create a data value for a closed-loop output, and e) and for using the data value for the closed-loop output to create a data value for a final output for forcing actual ICP to the desired ICP set-point.