An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME

Yoshihiko Kanoto, Tetsuo Ohmura, Norimasa Iida

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

3 Citations (Scopus)

Abstract

The HCCI engine could offer low NOx, PM emissions and high efficiency. However the operation region of the HCCI combustion is limited because of the knocking at high load and the misfire at low load. Moreover the HCCI principle lacks direct combustion control and needs a system to control the combustion phasing with high accuracy. Today there exists various ways to control the HCCI combustion, such as Variable Valve Train, Variable Compression Ratio, Inlet Air Heating and Dual Fuels. However such variable mechanisms and Inlet Air Heating tend to be heavy and complex. Dual Fuels method needs two types of fuels and has a challenge in infrastructure. In this study, in order to develop a small and light HCCI engine, a simple HCCI combustion control system is proposed. DME (Di-methyl Ether) is used as the fuel to keep the structure small and light. In this system, the mixing ratio of three gases: stoichiometric pre-mixture, hot EGR gas and cold EGR gas is changed by only throttles. Characteristics of the proposed HCCI combustion control system are evaluated experimentally. Both the load and the combustion phasing can be controlled by only two throttles. Focusing on each cycle data, cycle variability is observed. Therefore the nature of cycle variability is examined. It is caused by change of the mixing ratio of three gases and EGR property. For automatic control, output signals from engine are used as feedback signals. Therefore cycle variability must be low. The delay of CA50 (Crank Angle of 50% Heat Release), leads the high indicated thermal efficiency, but it also leads the increase of cycle variability. Though high indicated thermal efficiency is scarified, to avoid large cycle variability in automated control, CA50 around ATDC 7 degree is suitable in this system. Furthermore repeatability is observed in cycle variability of IMEP. There is a possibility to predict the future combustion.

Original languageEnglish
Title of host publicationSAE Technical Papers
DOIs
Publication statusPublished - 2007
EventJSAE/SAE International Fuels and Lubricants Meeting, JSAE 2007 - Kyoto, Japan
Duration: 2007 Jul 232007 Jul 23

Other

OtherJSAE/SAE International Fuels and Lubricants Meeting, JSAE 2007
CountryJapan
CityKyoto
Period07/7/2307/7/23

Fingerprint

Ethers
Engines
Air intakes
Gases
Control systems
Heating
Feedback
Hot Temperature

ASJC Scopus subject areas

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

Cite this

An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME. / Kanoto, Yoshihiko; Ohmura, Tetsuo; Iida, Norimasa.

SAE Technical Papers. 2007.

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

Kanoto, Y, Ohmura, T & Iida, N 2007, An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME. in SAE Technical Papers. JSAE/SAE International Fuels and Lubricants Meeting, JSAE 2007, Kyoto, Japan, 07/7/23. https://doi.org/10.4271/2007-01-1876
Kanoto, Yoshihiko ; Ohmura, Tetsuo ; Iida, Norimasa. / An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME. SAE Technical Papers. 2007.
@inproceedings{6b34a91b851c413da0d7810998a081c1,
title = "An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME",
abstract = "The HCCI engine could offer low NOx, PM emissions and high efficiency. However the operation region of the HCCI combustion is limited because of the knocking at high load and the misfire at low load. Moreover the HCCI principle lacks direct combustion control and needs a system to control the combustion phasing with high accuracy. Today there exists various ways to control the HCCI combustion, such as Variable Valve Train, Variable Compression Ratio, Inlet Air Heating and Dual Fuels. However such variable mechanisms and Inlet Air Heating tend to be heavy and complex. Dual Fuels method needs two types of fuels and has a challenge in infrastructure. In this study, in order to develop a small and light HCCI engine, a simple HCCI combustion control system is proposed. DME (Di-methyl Ether) is used as the fuel to keep the structure small and light. In this system, the mixing ratio of three gases: stoichiometric pre-mixture, hot EGR gas and cold EGR gas is changed by only throttles. Characteristics of the proposed HCCI combustion control system are evaluated experimentally. Both the load and the combustion phasing can be controlled by only two throttles. Focusing on each cycle data, cycle variability is observed. Therefore the nature of cycle variability is examined. It is caused by change of the mixing ratio of three gases and EGR property. For automatic control, output signals from engine are used as feedback signals. Therefore cycle variability must be low. The delay of CA50 (Crank Angle of 50{\%} Heat Release), leads the high indicated thermal efficiency, but it also leads the increase of cycle variability. Though high indicated thermal efficiency is scarified, to avoid large cycle variability in automated control, CA50 around ATDC 7 degree is suitable in this system. Furthermore repeatability is observed in cycle variability of IMEP. There is a possibility to predict the future combustion.",
author = "Yoshihiko Kanoto and Tetsuo Ohmura and Norimasa Iida",
year = "2007",
doi = "10.4271/2007-01-1876",
language = "English",
booktitle = "SAE Technical Papers",

}

TY - GEN

T1 - An investigation of combustion control using EGR for small and light HCCI engine fuelled with DME

AU - Kanoto, Yoshihiko

AU - Ohmura, Tetsuo

AU - Iida, Norimasa

PY - 2007

Y1 - 2007

N2 - The HCCI engine could offer low NOx, PM emissions and high efficiency. However the operation region of the HCCI combustion is limited because of the knocking at high load and the misfire at low load. Moreover the HCCI principle lacks direct combustion control and needs a system to control the combustion phasing with high accuracy. Today there exists various ways to control the HCCI combustion, such as Variable Valve Train, Variable Compression Ratio, Inlet Air Heating and Dual Fuels. However such variable mechanisms and Inlet Air Heating tend to be heavy and complex. Dual Fuels method needs two types of fuels and has a challenge in infrastructure. In this study, in order to develop a small and light HCCI engine, a simple HCCI combustion control system is proposed. DME (Di-methyl Ether) is used as the fuel to keep the structure small and light. In this system, the mixing ratio of three gases: stoichiometric pre-mixture, hot EGR gas and cold EGR gas is changed by only throttles. Characteristics of the proposed HCCI combustion control system are evaluated experimentally. Both the load and the combustion phasing can be controlled by only two throttles. Focusing on each cycle data, cycle variability is observed. Therefore the nature of cycle variability is examined. It is caused by change of the mixing ratio of three gases and EGR property. For automatic control, output signals from engine are used as feedback signals. Therefore cycle variability must be low. The delay of CA50 (Crank Angle of 50% Heat Release), leads the high indicated thermal efficiency, but it also leads the increase of cycle variability. Though high indicated thermal efficiency is scarified, to avoid large cycle variability in automated control, CA50 around ATDC 7 degree is suitable in this system. Furthermore repeatability is observed in cycle variability of IMEP. There is a possibility to predict the future combustion.

AB - The HCCI engine could offer low NOx, PM emissions and high efficiency. However the operation region of the HCCI combustion is limited because of the knocking at high load and the misfire at low load. Moreover the HCCI principle lacks direct combustion control and needs a system to control the combustion phasing with high accuracy. Today there exists various ways to control the HCCI combustion, such as Variable Valve Train, Variable Compression Ratio, Inlet Air Heating and Dual Fuels. However such variable mechanisms and Inlet Air Heating tend to be heavy and complex. Dual Fuels method needs two types of fuels and has a challenge in infrastructure. In this study, in order to develop a small and light HCCI engine, a simple HCCI combustion control system is proposed. DME (Di-methyl Ether) is used as the fuel to keep the structure small and light. In this system, the mixing ratio of three gases: stoichiometric pre-mixture, hot EGR gas and cold EGR gas is changed by only throttles. Characteristics of the proposed HCCI combustion control system are evaluated experimentally. Both the load and the combustion phasing can be controlled by only two throttles. Focusing on each cycle data, cycle variability is observed. Therefore the nature of cycle variability is examined. It is caused by change of the mixing ratio of three gases and EGR property. For automatic control, output signals from engine are used as feedback signals. Therefore cycle variability must be low. The delay of CA50 (Crank Angle of 50% Heat Release), leads the high indicated thermal efficiency, but it also leads the increase of cycle variability. Though high indicated thermal efficiency is scarified, to avoid large cycle variability in automated control, CA50 around ATDC 7 degree is suitable in this system. Furthermore repeatability is observed in cycle variability of IMEP. There is a possibility to predict the future combustion.

UR - http://www.scopus.com/inward/record.url?scp=84877417668&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877417668&partnerID=8YFLogxK

U2 - 10.4271/2007-01-1876

DO - 10.4271/2007-01-1876

M3 - Conference contribution

BT - SAE Technical Papers

ER -