| 摘要 |
<p>The method involves injecting reducing agent i.e. ammonia gas (30), at two distinct injection points in an exhaust line. Flow of the reducing agent is controlled at the injection points using a sonic orifice (36) of injectors by imposing a sonic flow on the reducing agent, where flows of the reducing agent injected at the points are virtually identical or with constant proportion. The reducing agent is sent to a multichannel gas distributor (21) before controlling the flow of reducing agent at each injection point. An independent claim is also included for a device for injecting gas reducing agent in an exhaust line of a burnt gas exhaust system of an internal combustion engine.</p> |
