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Summary & Details

A Study on Changes in Exhaust Gas Performance during the Use Process of Heavy-Duty Trucks Equipped with Urea SCR System

尿素SCRシステムを搭載した大型貨物車の使用過程における排出ガス性能の変化に関する研究

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Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20266034

Paper/Info type: Proceedings (Autumn)

No.99-26

Pages: 1-2(Total 2 p)

Date of publication: Oct 2026

Publisher: JSAE

Language: Japanese

Event: 2026 JSAE Annual Congress (Autumn)

Detailed Information

Author(J)	1) 山本敏朗
Author(E)	1) Toshiro Yamamoto
Affiliation(J)	1) 自動車技術総合機構
Affiliation(E)	1) NALTEC
Abstract(J)	尿素SCRシステム搭載大型貨物車に対して，15万km～50万kmと積算走行距離が増加する中で定期的にシャシダイナモメータ試験を実施し，同一車両の排出ガスデータを継続的に収集した．これを基に，使用過程におけるNOx，PM，N2O等の排出量から排出ガス性能の変化を把握すると共に変化の原因を探った． Translation
Abstract(E)	For heavy-duty truck equipped with urea SCR systems, we conducted periodic chassis dynamometer tests as their accumulated mileage increased from 150,000 km to 500,000 km, and continuously collected emissions data from the same vehicle. Based on this, we analyzed changes in exhaust gas performance by examining emissions of NOx, PM, N₂O, and other pollutants during the use process, and investigated the causes of these changes. Analysis revealed that as the accumulated mileage increased, the SCR catalyst temperature decreased to approximately 25°C to 30°C. It was considered possible that this caused changes in NOx, PM, and N₂O emissions.

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