Exhaust gas purification device for internal combustion engine
Abstract
Abstract Translated from Japanese (57)【要約】 【目的】 NO X 吸収剤からのNO X 放出時に失火の発 生を阻止する。 【構成】 排気マニホルド24の下流にNO X 吸収剤2 6を配置し、排気マニホルド24をEGRガス通路28 を介してサージタンク16に連結する。機関低中負荷運 転時にはEGRガスを再循環させ、リーン混合気を燃焼 させてこのとき発生するNO X をNO X 吸収剤26に吸 収させる。NO X 吸収剤26に吸収されたNO X を放出 還元すべく追加の燃料が膨張行程に噴射され、このとき EGR弁29が閉弁せしめられる。 (57) to prevent the occurrence of a misfire when Abstract: OBJECTIVE NO X release from the NO X absorbent. [Composition] NO x absorbent 2 is provided downstream of the exhaust manifold 24. 6 and the exhaust manifold 24 is connected to the EGR gas passage 28. Is connected to the surge tank 16 via. During low engine load operation, the EGR gas is recirculated to burn the lean air-fuel mixture so that the NO X generated at this time is absorbed by the NO X absorbent 26. Additional fuel is injected in the expansion stroke to release and reduce the NO X absorbed by the NO X absorbent 26, and the EGR valve 29 is closed at this time.
Inventors
- 👤 Yasushi Ito
- 👤 泰志 伊藤
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