Gpf with improved washcoat distribution

Exhaust system comprising a wall-flow filter for removing particles from the exhaust gas and an internal combustion engine, the wall-flow filter substrate having a length L and catalytic coating Z,

• wherein the wall-flow filter substrate has channels E and A extending in parallel between a first end (I) and a second end (II) of the wall-flow filter substrate, which are separated by porous walls and form surfaces OE and OA, and wherein the channels E are closed at the second end (II) and the channels A are closed at the first end (I), and
• wherein the exhaust gases enter the wall-flow filter through the first end (I) and leave the wall-flow filter through the second end (II), and
• wherein the wall-flow filter has a zone W that is substantially free of any washcoat and extends from the second end (II) of the wall-flow filter over at most 20% of the coatable length L of the wall-flow filter on the surfaces OA, and coating Z is located in the channels A on the surfaces OA and extends from the end of zone W over at least 35% of the coatable length L of the wall-flow filter and comprises at least one PGM supported by one or more carrier materials and one or more oxygen storage components.