Reducing motor vehicle emissions, comprises selecting gear in response to catalytic conversion and exhaust fume temperature information

摘要

A vehicle gear is selected depending on information concerning whether catalytic conversion is being carried out and on information relating to the temperature in the exhaust fumes, so that the selected gear can be used to control this temperature. The catalyst is of the LNC (Lean Nitrogen Oxide Catalyst) type. The exhaust fume system comprises at least one catalyst and a device for injecting hydrocarbons into this system and/or the engine combustion region.