Research for “Trap Catalyst” located on upper stream of main catalyst for suppressing the catalyst deterioratio n of internal combustion engine
- 提供方法
- 本サイト上にてダウンロード・閲覧可
- 形態
- 価格
- 一般価格(税込)：￥1,100 会員価格(税込)：￥880
- 文献番号
- 20229019
- 文献・情報種別
- SETC
No.2022-32-0019
- 掲載ページ
- 1-6(Total 6 p)
- 発行年月
- 2022年 10月
- 出版社
- (公社)自動車技術会
- 言語
- 英語
- イベント
- SETC2022
書誌事項
| 著者（英） | 1) Daisuke MATSUKAWA, 2) Akihito KASAI, 3) Kiichi SHIMAMURA, 4) Shuto SATO |
|---|---|
| 勤務先（英） | 1) Honda R&D Co., Ltd., 2) Honda R&D Co., Ltd., 3) Honda R&D Co., Ltd., 4) Honda R&D Co., Ltd. |
| 抄録（英） | As strengthening environmental regulations, exhaust gas emission regulation for internal combustion engines used for Small Off-Road Engines is increasingly strict. The decrease in “the initial exhaust emissions before durability test” and in “the deterioration of exhaust emissions after durability test” is important to meet the strict regulation. In this report, electrical power generator EU7000is using a general purpose engine was investigated and the catalyst deterioration was focused on for the deterioration of exhaust emissions after durability test. It was turned out that the main factor for the deterioration of exhaust emissions after durability test was the catalyst deterioration by the investigation of Deterioration Factor (DF) durability test. The causes of the catalyst deterioration are roughly classified into two types, “Thermal Deterioration” and “Poisoning Deterioration”. The thermal deterioration is that precious metal specific surface area decreases by heat affect. The poisoning deterioration is that the catalyst is covered by the poisoning components derived from the engine oil or the engine fuel. The catalysts were analyzed about the poisoning components quantitative analysis by X‐ray Fluorescence (XRF). The results showed that the phosphate amount is highly correlated with the purification rate decreasing. Therefore, the catalyst without precious metals which has same structure as main catalyst, (hereinafter referred as Trap Catalyst), was located on upper stream of main catalyst. The phosphate amount of poisoned catalyst decreased by the Trap Catalyst taking on the phosphate. These results implies that this technology contributes to reduce the environmental impact. 翻訳 |
