Internal combustion engine exhaust modification system

An internal combustion engine exhaust modification system, for transforming exhaust emissions from an internal combustion engine into modified exhaust emissions, the exhaust modification system comprising:

• a housing defined by a housing axis and extending between an inlet end, at which the exhaust emissions are received in the housing via an inlet end opening that is coaxial with the housing axis, and an outlet end, at which the modified exhaust emissions exit the housing;
• the housing having a first cross-sectional area therein at a first location that is downstream from the inlet end relative to the exhaust emissions received into the housing, and a second cross-sectional area at a second location that is downstream from the first location, the second cross-sectional area being larger than the first cross-sectional area, wherein the exhaust emissions at the first cross-sectional area flow faster relative to the housing than the exhaust emissions at the second cross-sectional area;
• an impeller rotatably mounted in the housing, the impeller being rotatable by the exhaust emissions directed via the inlet opening into the housing about an axis of the impeller that is coaxial with the housing axis, for drawing the exhaust emissions out of the engine and for accelerating particulate matter and liquid droplets in the exhaust emissions outwardly from the axis;
• a filter subassembly located in the housing and stationary relative to the housing, the filter subassembly being positioned downstream relative to the impeller, the filter subassembly being configured to collect at least part of the particulate matter and the liquid droplets in the exhaust emissions, for removing the at least part of the particulate matter and the liquid droplets from the exhaust emissions to form the exhaust emissions into the modified exhaust emissions, the filter subassembly being permeable to the modified exhaust emissions,
• wherein the impeller directs the at least part of the particulate matter and the liquid droplets to a peripheral region of the filter subassembly to accumulate in the peripheral region as the impeller is driven by the exhaust emissions moving past the impeller.