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Synchronous, simultaneous optimizati...

Franklin, Matthew Lee.

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Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine./
Author:	Franklin, Matthew Lee.
Description:	160 p.
Notes:	Adviser: David B. Kittelson.
Contained By:	Dissertation Abstracts International57-06B.
Subject:	Engineering, Automotive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9632372

Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine.
Franklin, Matthew Lee.

Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine. - 160 p.

Adviser: David B. Kittelson.

Thesis (Ph.D.)--University of Minnesota, 1996.

An adaptive control system which simultaneously optimizes the equivalence ratio and spark timing of a spark ignition engine for maximum thermal efficiency was conceived and tested. This adaptive control makes it possible to follow changing engine requirements because of engine differences due to manufacturing tolerances, wear, or deposit accumulation; or changing conditions, such as ambient pressure, temperature, and humidity. The control system proposed here introduces small, controlled fluctuations of the ignition timing and/or air fuel ratio and senses the resulting crankshaft speed fluctuations. This information is used to calculate corrections to these variables which move the system toward the desired operating condition: either at or in a fixed relation to best thermal efficiency. The control strategy was first simulated on an engine model to test the concept. Then experiments were performed on spark ignition engines to validate and calibrate the model. Simulations and actual test data showed that cycle-to-cycle combustion variations introduce noise into the system and limit speed of response of control schemes. The model was then used to improve the response of controller by systematically varying gains and correction limits and modifying the base strategy.Subjects--Topical Terms:

1018477
Engineering, Automotive.

Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine.
LDR:02205nam 2200277 a 45 001 929716
005 20110427
008 110427s1996 eng d
035 $a (UnM)AAI9632372
035 $a AAI9632372
040 $a UnM $c UnM
100 1 $a Franklin, Matthew Lee. $3 1253202
245 1 0 $a Synchronous, simultaneous optimization of ignition timing and equivalence ratio in a gas-fueled spark-ignition engine.
300 $a 160 p.
500 $a Adviser: David B. Kittelson.
500 $a Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3983.
502 $a Thesis (Ph.D.)--University of Minnesota, 1996.
520 $a An adaptive control system which simultaneously optimizes the equivalence ratio and spark timing of a spark ignition engine for maximum thermal efficiency was conceived and tested. This adaptive control makes it possible to follow changing engine requirements because of engine differences due to manufacturing tolerances, wear, or deposit accumulation; or changing conditions, such as ambient pressure, temperature, and humidity. The control system proposed here introduces small, controlled fluctuations of the ignition timing and/or air fuel ratio and senses the resulting crankshaft speed fluctuations. This information is used to calculate corrections to these variables which move the system toward the desired operating condition: either at or in a fixed relation to best thermal efficiency. The control strategy was first simulated on an engine model to test the concept. Then experiments were performed on spark ignition engines to validate and calibrate the model. Simulations and actual test data showed that cycle-to-cycle combustion variations introduce noise into the system and limit speed of response of control schemes. The model was then used to improve the response of controller by systematically varying gains and correction limits and modifying the base strategy.
590 $a School code: 0130.
650 4 $a Engineering, Automotive. $3 1018477
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0540
690 $a 0542
690 $a 0548
710 2 0 $a University of Minnesota. $3 676231
773 0 $t Dissertation Abstracts International $g 57-06B.
790 $a 0130
790 1 0 $a Kittelson, David B., $e advisor
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9632372