IMPROVEMENTS IN CONTROLLING INTERNAL COMBUSTION ENGINE EMISSIONS

摘要

The invention relates to a method for heating a catalyst. When the engine is started, engine speed is maintain at high rpm. This high rpm is maintained even if the driver shifts the transmission out of neutral, at time (A). Engine speed is lowered if an indication that the driver wishes to drive off is detected, at time (C), e.g. release of the brake pedal. The shaded area shows the additional contribution to catalyst warm up. The high rpm may be disabled if catalyst temperature is high enough or if the vehicle is parked on a slope. The invention also relates to a vehicle carrying out the method.