Patent ID: 8268273

Claim:
A method for the regeneration of at least one particle filter arranged in an exhaust gas train of an internal combustion engine, wherein a raw exhaust gas stream to be cleaned is supplied to the at least one particle filter, the method comprising: branching off, from the raw exhaust gas stream, an exhaust gas stream to be heated at a branching point upstream of the at least one particle filter; heating the branched-off exhaust gas stream by a heater to form a heated exhaust gas stream; supplying the raw exhaust gas stream to the at least one particle filter; mixing, during a regeneration mode, the heated exhaust gas stream with the raw gas exhaust stream at an entry point downstream from the branching point and upstream of the at least one particle filter, the heated exhaust gas stream at a higher temperature than the raw exhaust gas stream, the mixing occurring under control of at least one control device configured to actuate at least one of a throttle device and a shut-off device based at least in part on predetermined regeneration parameters; and supplying a fresh-air stream to the exhaust gas stream to-be-heated after at least one of a predetermined heating temperature is reached as measured in the heated exhaust gas stream and after a predetermined lambda value is reached, wherein, when at least one of an oxygen content and a lambda value of a to-be-heated exhaust gas stream falls below at least one of a predetermined oxygen limit value or lambda limit value during the regeneration mode, the control device at least one of shuts off and throttles the exhaust gas stream downstream of the branching point by at least one of the at least one throttle device and the shut-off device such that a predetermined amount of exhaust gas is branched off from the raw exhaust gas stream based at least in part on at least one of the oxygen content of the raw exhaust gas stream, the lambda value of the raw exhaust gas stream, and a function of the oxygen content or lambda value of the exhaust gas stream which is to be heated and which has been heated and sent to the at least one heating device arranged upstream of the entry point of the heated exhaust gas stream which has been branched off for heating.