Device and method for treating exhaust gas containing particles and motor vehicle having the device and performing the method

A device for treating exhaust gas having particles, the device comprising:

• an electrically neutral particle separator being a wall-flow filter or a partial-flow filter;
• and
• a particle agglomeration device positioned upstream of said particle separator in exhaust gas flow direction;
• said particle agglomeration device having at least one apparatus configured to generate an electric field and provide the particles with a charge and said particle agglomeration device having a particle buffer storage device through which the exhaust gas can flow;
• said particle buffer storage device being connected to an electrical pole having a charge opposing the charge of the particles, said particle buffer storage device having at least one open structure with a multiplicity of passages and said particle buffer storage device configured:
• to cause the particles to be deposited in a targeted manner on said particle buffer storage device due to an electric field,
• to cause the particles to come to rest on top of each other and increase in size due to a tendency of the particles to adhere to one another, and
• to cause the particles after having reached a desired size on said particle buffer storage device to be entrained again by the exhaust gas and supplied to said particle separator disposed downstream of said particle buffer storage device.