Abstract: The present invention relates to a particle filter and a method for operating a particle filter. The particle filter includes at least one filter portion forming an open filter system and also a heatable particle collecting element which is arranged adjacently to this filter portion and comprises a material having temperature-dependent electrical resistance. The method for operating the particle filter includes heating the particle collecting element and measuring the electrical resistance of the particle collecting element to determine whether to regenerate the particle filter.

Abstract: The present invention relates to a particle filter and a method for operating a particle filter. The particle filter includes at least one filter portion forming an open filter system and also a heatable particle collecting element which is arranged adjacently to this filter portion and comprises a material having temperature-dependent electrical resistance. The method for operating the particle filter includes heating the particle collecting element and measuring the electrical resistance of the particle collecting element to determine whether to regenerate the particle filter.

Abstract: The invention relates to a Method of purging a lean NOx trap (LNT) coupled downstream of a direct injection internal combustuion engine with post injection for achieving a purge air/fuel (A/F) ratio. At least two separate post injections are applied in the expansion stroke after a main injection train, so that a torque produced is decoupled from the A/F-control.