Exhaust system including ionization assembly

An ionization assembly for an exhaust system, the ionization assembly comprising:

• an electrically insulating support structure having one or more mounting surfaces for securing the support structure to an electrically conductive shell defining an exhaust pathway of the exhaust system;
• a support arm secured to the support structure;
• and
• a plurality of electrically conductive discs mounted on the support arm, the discs spaced apart from each other and decreasing in size relative to each other along the support arm.

An exhaust system, comprising:

• an electrically conductive shell defining an exhaust pathway, the shell having a tapered portion that tapers inward toward a longitudinal axis of the shell to define a narrowing region of the exhaust pathway that narrows in a first direction along the longitudinal axis;
• an ionization assembly, including:
• an electrically insulating support structure located within the exhaust pathway, and secured to the shell at one or more points,
• a support arm located within the exhaust pathway and extending into the narrowing region of the exhaust pathway, the support arm is supported relative to the shell by the electrically insulating support structure.
• a plurality of electrically conductive discs mounted on and supported by the support arm, with at least some of the discs located within the narrowing region of the exhaust pathway, the discs spaced apart from each other along the longitudinal axis, the discs decreasing in size relative to each other, as measured in a plane orthogonal to the longitudinal axis, in the first direction along the longitudinal axis;
• and
• a filter element covering interior surfaces of the tapered portion of the shell and tapering with the tapered portion of the shell.