Method and device for regenerating a particle filter

摘要

A method and device for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, wherein the particle filter is regenerated by oxidative burning of the particles during a regeneration phase, wherein oxygen consumption is balanced, directly or indirectly, during the regeneration phase via the temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to the temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter. A lambda value of λ=1 is set downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter.

主权项

1. A method for monitoring and controlling regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, the method comprising: regenerating the particle filter by oxidative burning of particles during a regeneration phase, balancing oxygen consumption, directly or indirectly, during the regeneration phase via temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to a temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter, and setting a lambda value of λ=1 downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter.