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Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine. / Cao, L ; Zhao, H ; Jiang, Xi et al.
In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 219, No. D6, 06.2005, p. 807-823.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Cao, L, Zhao, H, Jiang, X & Kalian, N 2005, 'Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine', Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 219, no. D6, pp. 807-823. https://doi.org/10.1243/095440705X11077

APA

Cao, L., Zhao, H., Jiang, X., & Kalian, N. (2005). Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 219(D6), 807-823. https://doi.org/10.1243/095440705X11077

Vancouver

Cao L, Zhao H, Jiang X, Kalian N. Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 2005 Jun;219(D6):807-823. doi: 10.1243/095440705X11077

Author

Cao, L ; Zhao, H ; Jiang, Xi et al. / Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine. In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 2005 ; Vol. 219, No. D6. pp. 807-823.

Bibtex

@article{873499ab959c481fab3f0aa320a26825,
title = "Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine",
abstract = "Controlled autoignition (CAI) combustion, also known as homogeneous charge compression ignition (HCCI), was achieved through the negative valve overlap approach by using small-lift camshafts. Three-dimensional multicycle engine simulations were carried out in order better to understand the effects of variable intake valve timings on the gas exchange process, mixing quality, CAI combustion, and pollutant formation in a four-stroke port fuel injection (PFI) gasoline engine. Full engine cycle simulation, including complete gas exchange and combustion processes, was carried out over several cycles in order to obtain the stable cycle for analysis. The combustion models used in the present study are a modified shell ignition model and a laminar and turbulent characteristic time model, which can take high residual gas fraction into account. After the validation of the model against experimental data, investigations of the effects of variable intake valve timing strategies on the CAI combustion process were carried out. These analyses show that the intake valve opening (WO) and intake valve closing (IVC) timings have a strong influence on the gas exchange and mixing processes in the cylinder, which in turn affect the engine performance and emissions. Symmetric IVO timing relative to exhaust valve closing (EVC) timing tends to produce a more stratified mixture, earlier ignition timing, and localized combustion, and hence higher NO, and lower unburned HC and CO emissions, whereas retarded WO leads to faster mixing, a more homogeneous mixture, and uniform temperature distribution.",
keywords = "controlled autoignition, homogeneous charge compression ignition, multicycle engine simulation, variable valve timing, MODEL",
author = "L Cao and H Zhao and Xi Jiang and N Kalian",
year = "2005",
month = jun,
doi = "10.1243/095440705X11077",
language = "English",
volume = "219",
pages = "807--823",
journal = "Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering",
issn = "0954-4070",
publisher = "SAGE Publications Inc.",
number = "D6",

}

RIS

TY - JOUR

T1 - Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine

AU - Cao, L

AU - Zhao, H

AU - Jiang, Xi

AU - Kalian, N

PY - 2005/6

Y1 - 2005/6

N2 - Controlled autoignition (CAI) combustion, also known as homogeneous charge compression ignition (HCCI), was achieved through the negative valve overlap approach by using small-lift camshafts. Three-dimensional multicycle engine simulations were carried out in order better to understand the effects of variable intake valve timings on the gas exchange process, mixing quality, CAI combustion, and pollutant formation in a four-stroke port fuel injection (PFI) gasoline engine. Full engine cycle simulation, including complete gas exchange and combustion processes, was carried out over several cycles in order to obtain the stable cycle for analysis. The combustion models used in the present study are a modified shell ignition model and a laminar and turbulent characteristic time model, which can take high residual gas fraction into account. After the validation of the model against experimental data, investigations of the effects of variable intake valve timing strategies on the CAI combustion process were carried out. These analyses show that the intake valve opening (WO) and intake valve closing (IVC) timings have a strong influence on the gas exchange and mixing processes in the cylinder, which in turn affect the engine performance and emissions. Symmetric IVO timing relative to exhaust valve closing (EVC) timing tends to produce a more stratified mixture, earlier ignition timing, and localized combustion, and hence higher NO, and lower unburned HC and CO emissions, whereas retarded WO leads to faster mixing, a more homogeneous mixture, and uniform temperature distribution.

AB - Controlled autoignition (CAI) combustion, also known as homogeneous charge compression ignition (HCCI), was achieved through the negative valve overlap approach by using small-lift camshafts. Three-dimensional multicycle engine simulations were carried out in order better to understand the effects of variable intake valve timings on the gas exchange process, mixing quality, CAI combustion, and pollutant formation in a four-stroke port fuel injection (PFI) gasoline engine. Full engine cycle simulation, including complete gas exchange and combustion processes, was carried out over several cycles in order to obtain the stable cycle for analysis. The combustion models used in the present study are a modified shell ignition model and a laminar and turbulent characteristic time model, which can take high residual gas fraction into account. After the validation of the model against experimental data, investigations of the effects of variable intake valve timing strategies on the CAI combustion process were carried out. These analyses show that the intake valve opening (WO) and intake valve closing (IVC) timings have a strong influence on the gas exchange and mixing processes in the cylinder, which in turn affect the engine performance and emissions. Symmetric IVO timing relative to exhaust valve closing (EVC) timing tends to produce a more stratified mixture, earlier ignition timing, and localized combustion, and hence higher NO, and lower unburned HC and CO emissions, whereas retarded WO leads to faster mixing, a more homogeneous mixture, and uniform temperature distribution.

KW - controlled autoignition

KW - homogeneous charge compression ignition

KW - multicycle engine simulation

KW - variable valve timing

KW - MODEL

U2 - 10.1243/095440705X11077

DO - 10.1243/095440705X11077

M3 - Journal article

VL - 219

SP - 807

EP - 823

JO - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

JF - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

SN - 0954-4070

IS - D6

ER -