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Air-fuel ratio control in an IC engi...

Chang, Chen-Fang.

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Air-fuel ratio control in an IC engine using an event-based observer.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Air-fuel ratio control in an IC engine using an event-based observer./
作者:	Chang, Chen-Fang.
面頁冊數:	157 p.
附註:	Adviser: J. David Powell.
Contained By:	Dissertation Abstracts International54-09B.
標題:	Engineering, Automotive. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9403912

Air-fuel ratio control in an IC engine using an event-based observer.
Chang, Chen-Fang.

Air-fuel ratio control in an IC engine using an event-based observer. - 157 p.

Adviser: J. David Powell.

Thesis (Ph.D.)--Stanford University, 1993.

A port fuel-injected single-cylinder engine was used to demonstrate the cycle-to-cycle AFR control structure. Air-fuel ratio followed the commanded stoichiometric value within 0.5% rms during fast throttle and speed transients.Subjects--Topical Terms:

1018477
Engineering, Automotive.

Air-fuel ratio control in an IC engine using an event-based observer.
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035 $a (UnM)AAI9403912
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040 $a UnM $c UnM
100 1 $a Chang, Chen-Fang. $3 1253086
245 1 0 $a Air-fuel ratio control in an IC engine using an event-based observer.
300 $a 157 p.
500 $a Adviser: J. David Powell.
500 $a Source: Dissertation Abstracts International, Volume: 54-09, Section: B, page: 4877.
502 $a Thesis (Ph.D.)--Stanford University, 1993.
520 $a A port fuel-injected single-cylinder engine was used to demonstrate the cycle-to-cycle AFR control structure. Air-fuel ratio followed the commanded stoichiometric value within 0.5% rms during fast throttle and speed transients.
520 $a Better fuel economy, reduced exhaust emissions, and improved drivability strongly depend on precise control of air-fuel ratio (AFR) during both steady and transient engine operations.
520 $a A discrete, nonlinear, fuel-injected spark-ignition engine model was developed and used for the design of model-based AFR control algorithms. The engine model includes intake manifold air dynamics, fuel wall-wetting dynamics, and process delays inherent in the four-stroke engine operation. The sampling period is synchronous with engine events ("event-based") as opposed to the conventional time synchronous sampling scheme ("time-based"). The model was validated with test data over a wide range of engine operating conditions.
520 $a The significant delay time from the AFR metering location to the exhaust oxygen sensor limits the speed of the system response if conventional feedback control design is used. Modern control and estimation theory was used to design a high bandwidth closed-loop AFR controller. The engine model was embedded in the control algorithm as an observer which provided an instantaneous estimate of the AFR for feedback control.
520 $a Precise transient AFR control requires exact knowledge of the air mass inducted, which is highly dependent on the motion of the throttle with respect to the intake event. Simple air flow control was achieved by implementing a drive-by-wire throttle whose motion was synchronous with the intake event.
590 $a School code: 0212.
650 4 $a Engineering, Automotive. $3 1018477
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0540
690 $a 0544
690 $a 0548
710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 54-09B.
790 $a 0212
790 1 0 $a Powell, J. David, $e advisor
791 $a Ph.D.
792 $a 1993
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9403912