Patent ID: 7331172

Claim:
A method for regenerating a particle filter ( 13 ) arranged in thermic connection to a catalyzer unit ( 14 ) in an exhaust canal ( 10 ) connected to an internal combustion engine ( 2 ), and wherein the internal combustion engine ( 2 ) is arranged to assume a first operational mode ( 60 ) in which a driving torque is produced and a second operational mode ( 80 ) which constitutes engine braking, where the internal combustion engine ( 2 ) supplies a compression work to a gas mixture which flows through the internal combustion engine ( 2 ) and the exhaust canal ( 10 ) without a corresponding expansion work having been emitted from the gas mixture, said method comprising: determining, using a control unit ( 22 ), that the internal combustion engine ( 2 ) is driven in the second operational mode ( 80 ) corresponding to engine braking with the temperature of the gas mixture in the exhaust canal rising; supplying fuel, via an injection unit ( 21 ) to the exhaust canal ( 10 ) during the second operational mode ( 80 ); and exposing the catalyzer unit ( 14 ) to the fuel which is oxidized at the particle filter ( 13 ) which is heated to such a temperature that the soot particles are transformed to carbon dioxide under reaction with oxygen contained in the gas mixture.