Technical Briefs

Sensitivity Analysis of Combustion Timing of Homogeneous Charge Compression Ignition Gasoline Engines

[+] Author and Article Information
Chia-Jui Chiang

Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 10607 R.O.Ccjchiang@mail.ntust.edu.tw

Anna G. Stefanopoulou

Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109annastef@umich.edu

J. Dyn. Sys., Meas., Control 131(1), 014506 (Dec 05, 2008) (5 pages) doi:10.1115/1.2936877 History: Received December 12, 2005; Revised February 29, 2008; Published December 05, 2008

The goal of this paper is to identify the dominant factors that should be included in a control oriented model in order to predict the start of combustion in a homogeneous charge compression ignition (HCCI) engine. Qualitative and quantitative information on the individual effects of fuel and exhaust gas recirculation on the HCCI combustion is provided. Using sensitivity analysis around a wide range of operating conditions of a single-cylinder port-injection gasoline HCCI engine, we find that temperature is the dominant factor in determining the start of combustion. Charge temperature thus becomes the “spark” in a HCCI engine. Therefore, a model without the composition terms should be adequate for model based regulation of the combustion timing in a port-injection gasoline HCCI engine with high dilution from the exhaust.

Copyright © 2009 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 2

Start of combustion: Test A and Test B for the Arrehnius integral with and without composition terms

Grahic Jump Location
Figure 1

Exhaust, intake and rebreathing valve profiles



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