Patent ID: 7356988
Filing Date: 2008-04-15
Classification: F01N,F02D,Y02T

Abstract:
1. Method for controlling the temperature of at least one catalyst arranged in an exhaust gas cleaning system ( 12 ) of a lean-runnable multi-cylinder engine ( 10 ), wherein energy is introduced into the exhaust gas cleaning system ( 12 ) by a lambda split, and the introduction of energy is limited depending on: (a) at least one of catalyst temperature, exhaust gas temperature, exhaust gas mass flow rate, change of the catalyst temperature with respect to time, change of the exhaust gas temperature with respect to time and change of the exhaust gas mass flow rate with respect to time; and (b) at least one of rate of change of the catalyst temperature with respect to time, rate of change of the exhaust gas temperature with respect to time and rate of change of the exhaust gas mass flow rate with respect to time.