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Title: Method of controlling cyclic variation in engine combustion

Abstract

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.

Inventors:
 [1];  [2];  [3];  [4];  [5];  [1]
  1. (Ann Arbor, MI)
  2. (Knoxville, TN)
  3. (Plymouth, MI)
  4. (Livonia, MI)
  5. (Canton, MI)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENERGY RES COR
OSTI Identifier:
872376
Patent Number(s):
5921221
Assignee:
Ford Global Technologies, Inc. (Dearborn, MI); Ford Motor Company (Dearborn, MI); Lockheed Martin Energy Research Corp. (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; controlling; cyclic; variation; engine; combustion; lean; burning; reduced; detecting; event; output; torsional; acceleration; cylinder; detected; predict; target; modifying; correction; term; inversely; proportional; average; phase; calculating; control; fuel; pulse; width; spark; timing; achieve; based; anti-correlation; spill-over; effects; fueling; lean burn; combustion event; pulse width; inversely proportional; engine combustion; cyclic variation; /123/701/

Citation Formats

Davis, Jr., Leighton Ira, Daw, Charles Stuart, Feldkamp, Lee Albert, Hoard, John William, Yuan, Fumin, and Connolly, Francis Thomas. Method of controlling cyclic variation in engine combustion. United States: N. p., 1999. Web.
Davis, Jr., Leighton Ira, Daw, Charles Stuart, Feldkamp, Lee Albert, Hoard, John William, Yuan, Fumin, & Connolly, Francis Thomas. Method of controlling cyclic variation in engine combustion. United States.
Davis, Jr., Leighton Ira, Daw, Charles Stuart, Feldkamp, Lee Albert, Hoard, John William, Yuan, Fumin, and Connolly, Francis Thomas. Fri . "Method of controlling cyclic variation in engine combustion". United States. https://www.osti.gov/servlets/purl/872376.
@article{osti_872376,
title = {Method of controlling cyclic variation in engine combustion},
author = {Davis, Jr., Leighton Ira and Daw, Charles Stuart and Feldkamp, Lee Albert and Hoard, John William and Yuan, Fumin and Connolly, Francis Thomas},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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