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Method of controlling cyclic variation in engine combustion

Patent ·
OSTI ID:872376
 [1];  [2];  [3];  [4];  [5]
  1. Knoxville, TN
  2. Plymouth, MI
  3. Livonia, MI
  4. Canton, MI
  5. Ann Arbor, MI
+ Show Author Affiliations
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.
Research Organization:
LOCKHEED MARTIN ENERGY RES COR
DOE Contract Number:
AC05-96OR22464;
Assignee:
Ford Global Technologies, Inc. (Dearborn, MI); Ford Motor Company (Dearborn, MI); Lockheed Martin Energy Research Corp. (Oak Ridge, TN)
Patent Number(s):
US 5921221
OSTI ID:
872376
Country of Publication:
United States
Language:
English

References (3)

Cycle-to-Cycle Variations: A Chaotic Process? journal February 1988
A Dynamical Instability of Spark-Ignited Engines journal June 1984
The Influence of Arc Parameters on Combustion in a Spark-Ignition Engine
  • Hancock, M. S.; Buckingham, D. J.; Belmont, M. R.
  • SAE International Congress and Exposition, SAE Technical Paper Series https://doi.org/10.4271/860321
conference February 1986

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/123/701/
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