Emissions suppression mechanism of premixed diesel combustion with variable valve timing

Y. Murata, Jin Kusaka, M. Odaka, Yasuhiro Daisho, D. Kawano, H. Suzuki, H. Ishii, Y. Goto

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A variable valve timing (WT) mechanism is applied to achieve premixed diesel combustion at higher load for low emissions and high thermal efficiency in a light-duty diesel engine. By means of late intake valve closing (LIVC), compressed gas temperatures near the top dead centre are lowered, thereby preventing too early ignition and increasing ignition delay to enhance fuel-air mixing. The variability of an effective compression ratio has significant potential for ignition timing control of conventional diesel fuel mixtures. At the same time, the expansion ratio is kept constant to ensure thermal efficiency. Combining the control of LIVC, exhaust gas recirculation (EGR), supercharging systems, and high-pressure fuel injection equipment can simultaneously reduce NOx and smoke. The NOx and smoke suppression mechanism in the premixed diesel combustion is analysed using a three-dimensional computational fluid dynamics (3D-CFD) code combined with detailed chemistry. LIVC can achieve a significant NOx and smoke reduction due to lowering combustion temperatures and avoiding local overrich regions in the mixtures respectively.

Original languageEnglish
Pages (from-to)415-428
Number of pages14
JournalInternational Journal of Engine Research
Volume8
Issue number5
DOIs
Publication statusPublished - 2007

Fingerprint

Intake valves
Smoke
Ignition
Computational fluid dynamics
Exhaust gas recirculation
Fuel injection
Diesel fuels
Diesel engines
Temperature
Air
Gases
Hot Temperature

Keywords

  • Diesel engine
  • Emission
  • KIVA3V
  • LIVC
  • Miller-PCCI
  • VVT

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Emissions suppression mechanism of premixed diesel combustion with variable valve timing. / Murata, Y.; Kusaka, Jin; Odaka, M.; Daisho, Yasuhiro; Kawano, D.; Suzuki, H.; Ishii, H.; Goto, Y.

In: International Journal of Engine Research, Vol. 8, No. 5, 2007, p. 415-428.

Research output: Contribution to journalArticle

Murata, Y. ; Kusaka, Jin ; Odaka, M. ; Daisho, Yasuhiro ; Kawano, D. ; Suzuki, H. ; Ishii, H. ; Goto, Y. / Emissions suppression mechanism of premixed diesel combustion with variable valve timing. In: International Journal of Engine Research. 2007 ; Vol. 8, No. 5. pp. 415-428.
@article{bf2c3f59009f45e98a07a79ef5ada475,
title = "Emissions suppression mechanism of premixed diesel combustion with variable valve timing",
abstract = "A variable valve timing (WT) mechanism is applied to achieve premixed diesel combustion at higher load for low emissions and high thermal efficiency in a light-duty diesel engine. By means of late intake valve closing (LIVC), compressed gas temperatures near the top dead centre are lowered, thereby preventing too early ignition and increasing ignition delay to enhance fuel-air mixing. The variability of an effective compression ratio has significant potential for ignition timing control of conventional diesel fuel mixtures. At the same time, the expansion ratio is kept constant to ensure thermal efficiency. Combining the control of LIVC, exhaust gas recirculation (EGR), supercharging systems, and high-pressure fuel injection equipment can simultaneously reduce NOx and smoke. The NOx and smoke suppression mechanism in the premixed diesel combustion is analysed using a three-dimensional computational fluid dynamics (3D-CFD) code combined with detailed chemistry. LIVC can achieve a significant NOx and smoke reduction due to lowering combustion temperatures and avoiding local overrich regions in the mixtures respectively.",
keywords = "Diesel engine, Emission, KIVA3V, LIVC, Miller-PCCI, VVT",
author = "Y. Murata and Jin Kusaka and M. Odaka and Yasuhiro Daisho and D. Kawano and H. Suzuki and H. Ishii and Y. Goto",
year = "2007",
doi = "10.1243/14680874JER01007",
language = "English",
volume = "8",
pages = "415--428",
journal = "International Journal of Engine Research",
issn = "1468-0874",
publisher = "SAGE Publications Ltd",
number = "5",

}

TY - JOUR

T1 - Emissions suppression mechanism of premixed diesel combustion with variable valve timing

AU - Murata, Y.

AU - Kusaka, Jin

AU - Odaka, M.

AU - Daisho, Yasuhiro

AU - Kawano, D.

AU - Suzuki, H.

AU - Ishii, H.

AU - Goto, Y.

PY - 2007

Y1 - 2007

N2 - A variable valve timing (WT) mechanism is applied to achieve premixed diesel combustion at higher load for low emissions and high thermal efficiency in a light-duty diesel engine. By means of late intake valve closing (LIVC), compressed gas temperatures near the top dead centre are lowered, thereby preventing too early ignition and increasing ignition delay to enhance fuel-air mixing. The variability of an effective compression ratio has significant potential for ignition timing control of conventional diesel fuel mixtures. At the same time, the expansion ratio is kept constant to ensure thermal efficiency. Combining the control of LIVC, exhaust gas recirculation (EGR), supercharging systems, and high-pressure fuel injection equipment can simultaneously reduce NOx and smoke. The NOx and smoke suppression mechanism in the premixed diesel combustion is analysed using a three-dimensional computational fluid dynamics (3D-CFD) code combined with detailed chemistry. LIVC can achieve a significant NOx and smoke reduction due to lowering combustion temperatures and avoiding local overrich regions in the mixtures respectively.

AB - A variable valve timing (WT) mechanism is applied to achieve premixed diesel combustion at higher load for low emissions and high thermal efficiency in a light-duty diesel engine. By means of late intake valve closing (LIVC), compressed gas temperatures near the top dead centre are lowered, thereby preventing too early ignition and increasing ignition delay to enhance fuel-air mixing. The variability of an effective compression ratio has significant potential for ignition timing control of conventional diesel fuel mixtures. At the same time, the expansion ratio is kept constant to ensure thermal efficiency. Combining the control of LIVC, exhaust gas recirculation (EGR), supercharging systems, and high-pressure fuel injection equipment can simultaneously reduce NOx and smoke. The NOx and smoke suppression mechanism in the premixed diesel combustion is analysed using a three-dimensional computational fluid dynamics (3D-CFD) code combined with detailed chemistry. LIVC can achieve a significant NOx and smoke reduction due to lowering combustion temperatures and avoiding local overrich regions in the mixtures respectively.

KW - Diesel engine

KW - Emission

KW - KIVA3V

KW - LIVC

KW - Miller-PCCI

KW - VVT

UR - http://www.scopus.com/inward/record.url?scp=37249058329&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37249058329&partnerID=8YFLogxK

U2 - 10.1243/14680874JER01007

DO - 10.1243/14680874JER01007

M3 - Article

AN - SCOPUS:37249058329

VL - 8

SP - 415

EP - 428

JO - International Journal of Engine Research

JF - International Journal of Engine Research

SN - 1468-0874

IS - 5

ER -