A Method for Predicting Performance Improvements with Effective Cycle-To-Cycle Control of Highly Dilute Spark Ignition Engine Combustion

Abstract

Dilute spark ignition engine combustion offers a promising method of improving fuel efficiency and reducing engine-out emissions and yet is not currently feasible owing to high levels of cyclic variability under highly dilute homogeneous operation. The deterministic nature of the undesirable cycle-to-cycle variations in combustion heat release implies that appropriate control schemes should yield significant reductions in cyclic variability, making it possible to use higher levels of charge dilution in production engines. A novel analysis approach is used to predict the improvement in fuel conversion efficiency that could be expected with effective control. Additionally, this analysis gives some insight into the effect of spark timing on the dynamics and controllability of the system.

Department(s)

Mechanical and Aerospace Engineering

Second Department

Electrical and Computer Engineering

Keywords and Phrases

Cycle-To-Cycle Control; Dilute Spark Ignition Engine Combustion; Fuel Efficiency; Performance Improvement

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Professional Engineering Publishing (Institution of Mechanical Engineers), All rights reserved.

Publication Date

01 Mar 2009

Link to Full Text

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