A study of fuel and EGR stratification to reduce pressure-rise rates in a HCCI engine

Kyohei Ozaki, Dong Won Jung, Norimasa Iida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Problem of HCCI combustion is knocking due to a steep heat release by the ignition that is occurred in each local area at the same time. It is considered that dispersion of auto-ignition timing at each local area in the combustion chamber is necessary to prevent this problem. One of technique of this solution is to make thermal stratification. It could be made by using two-stage ignition fuel, which has large heat release at low temperature reaction. Dispersion of fuel concentration leads to difference of temperature histories while combustion phasing is dispersed at each local area. Also, EGR gas stratification could make difference of temperature histories at each local area because of that of the characteristics. This study examines the effect of mixing stratification by stratifying the charge of fuel and CO2. A single-cylinder engine equipped with optical access was used in experiments, and numerical analysis was executed. This study shows that stratified mixtures of the fuel and EGR gas make differences of the temperature histories at each local area, which results in difference of the combustion phasing at each local area in combustion chamber and reduction of PRR.

Original languageEnglish
Title of host publicationSAE Technical Papers
Volume2013
DOIs
Publication statusPublished - 2013

Fingerprint

Engines
Ignition
Combustion chambers
Thermal stratification
Temperature
Engine cylinders
Gases
Numerical analysis
Experiments
Hot Temperature

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Ozaki, K., Jung, D. W., & Iida, N. (2013). A study of fuel and EGR stratification to reduce pressure-rise rates in a HCCI engine. In SAE Technical Papers (Vol. 2013) https://doi.org/10.4271/2013-32-9070

A study of fuel and EGR stratification to reduce pressure-rise rates in a HCCI engine. / Ozaki, Kyohei; Jung, Dong Won; Iida, Norimasa.

SAE Technical Papers. Vol. 2013 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ozaki, Kyohei ; Jung, Dong Won ; Iida, Norimasa. / A study of fuel and EGR stratification to reduce pressure-rise rates in a HCCI engine. SAE Technical Papers. Vol. 2013 2013.
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