Process for mixing a nitrogen oxide reducing agent with the exhaust gas of an IC engine comprises fitting a reducing agent amount to the requirement in a first region and partially mixing reducing agent in a second region

摘要

The process for mixing a nitrogen oxide reducing agent (30) with the exhaust gas of an IC engine (10) via a mixing valve (36) comprises fitting a reducing agent amount to the requirement in a first region by varying a continuously mixed reducing agent amount and partially mixing reducing agent in a second region in a discontinuous intermittent manner. An independent claim is also included for a control device (18) for controlling the mixing process.