Analyses of mechanism on roadside pollution by on-board emissions measurement system (transient characteristics of NOx emissions in vehicles with EGR system in real traffic conditions)

Yutaka Takada, Norifumi Takada, Norimasa Iida

研究成果: Article

抄録

In order to clarify the reason why the NOx emissions factor is higher at vehicle acceleration at intersections etc, two freight vehicles with EGR system for the reduction of NOx were tested by on-board NOx measurement system. Higher NOx emissions factor was observed at lower gear operations in each vehicle. The NOx emissions characteristics were analyzed in the view of engine torque, NOx mass emissions and EGR ratio, considering the rate of engine speed change. As the results, it was found that lower gear operations made the rate of engine speed change higher and also made EGR ratio lower, resulting in higher NOx emissions. This seems to be one of the factors to engender the intensive NOx pollution at roadside.

元の言語English
ページ(範囲)2006-2013
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
71
発行部数6
出版物ステータスPublished - 2005 6
外部発表Yes

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Roadsides
Pollution
Engines
Gears
Torque

ASJC Scopus subject areas

  • Mechanical Engineering

これを引用

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abstract = "In order to clarify the reason why the NOx emissions factor is higher at vehicle acceleration at intersections etc, two freight vehicles with EGR system for the reduction of NOx were tested by on-board NOx measurement system. Higher NOx emissions factor was observed at lower gear operations in each vehicle. The NOx emissions characteristics were analyzed in the view of engine torque, NOx mass emissions and EGR ratio, considering the rate of engine speed change. As the results, it was found that lower gear operations made the rate of engine speed change higher and also made EGR ratio lower, resulting in higher NOx emissions. This seems to be one of the factors to engender the intensive NOx pollution at roadside.",
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AU - Takada, Yutaka

AU - Takada, Norifumi

AU - Iida, Norimasa

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N2 - In order to clarify the reason why the NOx emissions factor is higher at vehicle acceleration at intersections etc, two freight vehicles with EGR system for the reduction of NOx were tested by on-board NOx measurement system. Higher NOx emissions factor was observed at lower gear operations in each vehicle. The NOx emissions characteristics were analyzed in the view of engine torque, NOx mass emissions and EGR ratio, considering the rate of engine speed change. As the results, it was found that lower gear operations made the rate of engine speed change higher and also made EGR ratio lower, resulting in higher NOx emissions. This seems to be one of the factors to engender the intensive NOx pollution at roadside.

AB - In order to clarify the reason why the NOx emissions factor is higher at vehicle acceleration at intersections etc, two freight vehicles with EGR system for the reduction of NOx were tested by on-board NOx measurement system. Higher NOx emissions factor was observed at lower gear operations in each vehicle. The NOx emissions characteristics were analyzed in the view of engine torque, NOx mass emissions and EGR ratio, considering the rate of engine speed change. As the results, it was found that lower gear operations made the rate of engine speed change higher and also made EGR ratio lower, resulting in higher NOx emissions. This seems to be one of the factors to engender the intensive NOx pollution at roadside.

KW - Emission /NOx

KW - On-board Measurement System

KW - Pollution

KW - Traffic Environment

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