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Torque control strategy for a diesel engine during lean-rich modulation using independent fuel injection maps

  • US 6,990,951 B1
  • Filed: 07/12/2004
  • Issued: 01/31/2006
  • Est. Priority Date: 07/12/2004
  • Status: Active Grant
First Claim
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1. A method of operating a compression ignition engine to accomplish lean-rich modulation of fueling, the method comprising:

  • processing certain data to modulate fueling between lean modulation and rich modulation;

    during lean modulation, processing data representing a particular set of operating conditions to select a particular lean fueling map that comprises fueling data appropriate to the particular set of operating conditions for causing the engine to be fueled in a manner that causes the engine to run lean and develop a corresponding torque; and

    during rich modulation, processing data representing substantially the same particular set of operating conditions to select a particular rich fueling map that comprises fueling data appropriate to that substantially same particular set of operating conditions for causing the engine to be fueled in a manner that causes the engine to run rich and develop substantially the same corresponding torque as during lean modulation.

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