Method of controlling cyclic variation in engine combustion

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872376

Daw, Charles Stuart ^[1]; Feldkamp, Lee Albert ^[2]; Hoard, John William ^[3]; Yuan, Fumin ^[4]; Connolly, Francis Thomas ^[5]

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1. Knoxville, TN
2. Plymouth, MI
3. Livonia, MI
4. Canton, MI
5. Ann Arbor, MI

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: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• 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

Related Subjects

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
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