ENGINE DRIVEN VEHICLE WITH EXHAUST EMISSION CLEANING

摘要

The invention relates to a method of producing lower emissions in the operation of a vehicle comprising an internal combustion engine (10) which gives off exhaust gases to an exhaust system (120, 140, 150) comprising a catalytic converter (320), injectors (310, 110) which are designed to inject hydrocarbon into the exhaust system and/or into the engine combustion chamber (381), and a transmission (90) that can be driven by the engine. The method comprises the step in which a gear in the vehicle transmission is selected as a function at least of information that catalytic conversion is required and information on the temperature (T) in the exhaust system, so that the gear selected regulates the temperature in the exhaust system. The catalytic converter is preferably of the LNC (Lean NO, Catalyst) type.