Exhaust gas cleaning device for reducing nitrogen oxides in a vehicle engine exhaust gas comprises an exhaust gas passage, a nitrogen oxide cleaning and a reducing agent delivery unit

摘要

Exhaust gas cleaning device comprises an exhaust gas passage (31, 32, 33) through which exhaust gas passes from an engine (60), a nitrogen oxide cleaning catalyst (40) arranged in a part of the exhaust gas passage and a reducing agent delivery unit (10) for adding a reducing agent into an exhaust gas passage. An independent claim is also included for an exhaust gas cleaning method using the above cleaning device. Preferred Features: The reducing agent delivery unit uses exhaust gas heat as the heat for removing components having high reduction capability from a mixture consisting of a fuel for the engine. A unit (20) introduces the mixture from a mixture tank (50) to the reducing agent removal device.