Method of controlling cyclic variation in engine combustion
Cyclic variation in combustion of a lean burning engine is reduced by detecting an engine combustion event output such as torsional acceleration in a cylinder (i) at a combustion event (k), using the detected acceleration to predict a target acceleration for the cylinder at the next combustion event (k+1), modifying the target output by a correction term that is inversely proportional to the average phase of the combustion event output of cylinder (i) and calculating a control output such as fuel pulse width or spark timing necessary to achieve the target acceleration for cylinder (i) at combustion event (k+1) based on anti-correlation with the detected acceleration and spill-over effects from fueling. 27 figs.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- Assignee:
- Ford Global Technologies, Inc., Dearborn, MI (United States); Ford Motor Co., Dearborn, MI (United States); Lockheed Martin Energy Research Corp., Oak Ridge, TN (United States)
- Patent Number(s):
- US 5921221; A
- Application Number:
- PPN: US 9-075291
- OSTI ID:
- 6446113
- Resource Relation:
- Patent File Date: 8 May 1998
- Country of Publication:
- United States
- Language:
- English
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