Study on Auto-Ignition and Combustion Mechanism of HCCI Engine

2004-32-0095

09/27/2004

Event
Small Engine Technology Conference & Exposition
Authors Abstract
Content
In the HCCI (Homogeneous Charge Compression Ignition) engine, a mixture of fuel and air is supplied to the cylinder and auto-ignition occurs resulting from compression. This method can expand the lean flammability limit, realizing smokeless combustion and also having the potential for realizing low NOx and high efficiency. The optimal ignition timing is necessary in order to keep high thermal efficiency. The Ignition in the HCCI engine largely depends on the chemical reaction between the fuel and the oxidizer. Physical methods in conventional engines cannot control it, so a chemical method is demanded. Combustion duration is maintained properly to avoid knocking. In addition, the amount of HC and CO emissions must be reduced. The objective of this study is to clarify the following through calculations with detailed chemical reactions and through experiment with the 2-stroke HCCI engine: the chemical reaction mechanism, and HC and CO emission mechanisms. Ignition and combustion mechanisms and the effect of pre-mixture heterogeneity on ignition and combustion are also clarified. This is done by using an optically accessible engine and measuring the luminescence at auto-ignition and during the combustion process.
Meta TagsDetails
DOI
https://doi.org/10.4271/2004-32-0095
Pages
21
Citation
Iida, N., Yamasaki, Y., Sato, S., Kumano, K. et al., "Study on Auto-Ignition and Combustion Mechanism of HCCI Engine," SAE Technical Paper 2004-32-0095, 2004, https://doi.org/10.4271/2004-32-0095.
Additional Details
Publisher
Published
Sep 27, 2004
Product Code
2004-32-0095
Content Type
Technical Paper
Language
English