EGR gas composition effects on ignition delays in diesel combustion

Yoshimitsu Kobashi; Masaki Todokoro; Gen Shibata; Hideyuki Ogawa; Toshihiro Mori; Daichi Imai

doi:10.1016/j.fuel.2020.118730

EGR gas composition effects on ignition delays in diesel combustion

Yoshimitsu Kobashi, Masaki Todokoro, Gen Shibata, Hideyuki Ogawa, Toshihiro Mori, Daichi Imai

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

This paper presents the effects on ignition delays of a range of exhaust gas compositions recirculated in the intake air. The ignition delays were measured in a single-cylinder diesel engine introducing a variety of hydrocarbons, nitrogen oxides (NO_x), and carbon monoxide (CO) into the intake gas, and changing the concentrations of these components. The experimental results show that the ignition delay decreases with the NO_x addition, NO₂ promotes the ignition more than NO, and this effect is more pronounced at higher intake gas temperatures. The ignition delay decreases with HC addition under NO_x rich conditions while there is little effect under low NO_x conditions, and the ignition delay changes with the kinds of hydrocarbons. The CO has little effect on the ignition delay. With the aid of chemical reaction analysis, the mechanisms of these changes are elucidated.

Original language	English
Article number	118730
Journal	Fuel
Volume	281
DOIs	https://doi.org/10.1016/j.fuel.2020.118730
Publication status	Published - Dec 1 2020
Externally published	Yes

Keywords

Diesel engine
Exhaust gas recirculation
Ignition delay
Nitrogen oxide

ASJC Scopus subject areas

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

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10.1016/j.fuel.2020.118730

Cite this

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title = "EGR gas composition effects on ignition delays in diesel combustion",

abstract = "This paper presents the effects on ignition delays of a range of exhaust gas compositions recirculated in the intake air. The ignition delays were measured in a single-cylinder diesel engine introducing a variety of hydrocarbons, nitrogen oxides (NOx), and carbon monoxide (CO) into the intake gas, and changing the concentrations of these components. The experimental results show that the ignition delay decreases with the NOx addition, NO2 promotes the ignition more than NO, and this effect is more pronounced at higher intake gas temperatures. The ignition delay decreases with HC addition under NOx rich conditions while there is little effect under low NOx conditions, and the ignition delay changes with the kinds of hydrocarbons. The CO has little effect on the ignition delay. With the aid of chemical reaction analysis, the mechanisms of these changes are elucidated.",

keywords = "Diesel engine, Exhaust gas recirculation, Ignition delay, Nitrogen oxide",

author = "Yoshimitsu Kobashi and Masaki Todokoro and Gen Shibata and Hideyuki Ogawa and Toshihiro Mori and Daichi Imai",

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doi = "10.1016/j.fuel.2020.118730",

language = "English",

volume = "281",

journal = "Fuel",

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TY - JOUR

T1 - EGR gas composition effects on ignition delays in diesel combustion

AU - Kobashi, Yoshimitsu

AU - Todokoro, Masaki

AU - Shibata, Gen

AU - Ogawa, Hideyuki

AU - Mori, Toshihiro

AU - Imai, Daichi

PY - 2020/12/1

Y1 - 2020/12/1

N2 - This paper presents the effects on ignition delays of a range of exhaust gas compositions recirculated in the intake air. The ignition delays were measured in a single-cylinder diesel engine introducing a variety of hydrocarbons, nitrogen oxides (NOx), and carbon monoxide (CO) into the intake gas, and changing the concentrations of these components. The experimental results show that the ignition delay decreases with the NOx addition, NO2 promotes the ignition more than NO, and this effect is more pronounced at higher intake gas temperatures. The ignition delay decreases with HC addition under NOx rich conditions while there is little effect under low NOx conditions, and the ignition delay changes with the kinds of hydrocarbons. The CO has little effect on the ignition delay. With the aid of chemical reaction analysis, the mechanisms of these changes are elucidated.

AB - This paper presents the effects on ignition delays of a range of exhaust gas compositions recirculated in the intake air. The ignition delays were measured in a single-cylinder diesel engine introducing a variety of hydrocarbons, nitrogen oxides (NOx), and carbon monoxide (CO) into the intake gas, and changing the concentrations of these components. The experimental results show that the ignition delay decreases with the NOx addition, NO2 promotes the ignition more than NO, and this effect is more pronounced at higher intake gas temperatures. The ignition delay decreases with HC addition under NOx rich conditions while there is little effect under low NOx conditions, and the ignition delay changes with the kinds of hydrocarbons. The CO has little effect on the ignition delay. With the aid of chemical reaction analysis, the mechanisms of these changes are elucidated.

KW - Diesel engine

KW - Exhaust gas recirculation

KW - Ignition delay

KW - Nitrogen oxide

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JF - Fuel

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EGR gas composition effects on ignition delays in diesel combustion

Abstract

Keywords

ASJC Scopus subject areas

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