Simultaneous attainment of low fuel consumption high output power and low exhaust emissions in direct injection SI engines

Yasuo Takagi; Teruyuki Itoh; Shigeo Muranaka; Akihiro Iiyama; Yasunori Iwakiri; Tomonori Urushihara; Ken Naitoh

doi:10.4271/980149

Simultaneous attainment of low fuel consumption high output power and low exhaust emissions in direct injection SI engines

Yasuo Takagi^*, Teruyuki Itoh, Shigeo Muranaka, Akihiro Iiyama, Yasunori Iwakiri, Tomonori Urushihara, Ken Naitoh

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

72 Citations (Scopus)

Abstract

This paper describes simultaneous attainment in improving fuel consumption, output power and reducing HC emissions with a direct injection S.I. engine newly developed in Nissan. Straight intake port is adopted to increase discharge coefficient under WOT operation and horizontal swirl flow is generated by a swirl control valve to provide stable stratified charge combustion under part load conditions. As a result, fuel consumption is reduced by more than 20% and power output is improved by approximately 10%. Moreover, unburned HC is reduced by equivalently 30% in engine cold start condition. An application of diagnostic and numerical simulation tools to investigate and optimize various factors are also introduced.

Original language	English
Journal	SAE Technical Papers
DOIs	https://doi.org/10.4271/980149
Publication status	Published - 1998 Jan 1
Externally published	Yes
Event	1998 SAE International Congress and Exposition - Detroit, MI, United States Duration: 1998 Feb 23 → 1998 Feb 26

ASJC Scopus subject areas

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

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title = "Simultaneous attainment of low fuel consumption high output power and low exhaust emissions in direct injection SI engines",

abstract = "This paper describes simultaneous attainment in improving fuel consumption, output power and reducing HC emissions with a direct injection S.I. engine newly developed in Nissan. Straight intake port is adopted to increase discharge coefficient under WOT operation and horizontal swirl flow is generated by a swirl control valve to provide stable stratified charge combustion under part load conditions. As a result, fuel consumption is reduced by more than 20% and power output is improved by approximately 10%. Moreover, unburned HC is reduced by equivalently 30% in engine cold start condition. An application of diagnostic and numerical simulation tools to investigate and optimize various factors are also introduced.",

author = "Yasuo Takagi and Teruyuki Itoh and Shigeo Muranaka and Akihiro Iiyama and Yasunori Iwakiri and Tomonori Urushihara and Ken Naitoh",

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doi = "10.4271/980149",

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T1 - Simultaneous attainment of low fuel consumption high output power and low exhaust emissions in direct injection SI engines

AU - Takagi, Yasuo

AU - Itoh, Teruyuki

AU - Muranaka, Shigeo

AU - Iiyama, Akihiro

AU - Iwakiri, Yasunori

AU - Urushihara, Tomonori

AU - Naitoh, Ken

PY - 1998/1/1

Y1 - 1998/1/1

N2 - This paper describes simultaneous attainment in improving fuel consumption, output power and reducing HC emissions with a direct injection S.I. engine newly developed in Nissan. Straight intake port is adopted to increase discharge coefficient under WOT operation and horizontal swirl flow is generated by a swirl control valve to provide stable stratified charge combustion under part load conditions. As a result, fuel consumption is reduced by more than 20% and power output is improved by approximately 10%. Moreover, unburned HC is reduced by equivalently 30% in engine cold start condition. An application of diagnostic and numerical simulation tools to investigate and optimize various factors are also introduced.

AB - This paper describes simultaneous attainment in improving fuel consumption, output power and reducing HC emissions with a direct injection S.I. engine newly developed in Nissan. Straight intake port is adopted to increase discharge coefficient under WOT operation and horizontal swirl flow is generated by a swirl control valve to provide stable stratified charge combustion under part load conditions. As a result, fuel consumption is reduced by more than 20% and power output is improved by approximately 10%. Moreover, unburned HC is reduced by equivalently 30% in engine cold start condition. An application of diagnostic and numerical simulation tools to investigate and optimize various factors are also introduced.

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M3 - Conference article

AN - SCOPUS:85072464084

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JF - SAE Technical Papers

T2 - 1998 SAE International Congress and Exposition

Y2 - 23 February 1998 through 26 February 1998

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Simultaneous attainment of low fuel consumption high output power and low exhaust emissions in direct injection SI engines

Abstract

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