Particulate trap regeneration system and method

摘要

A particulate trap regeneration system (12) has an exhaust pipe (18) that is connected between an engine (14) and a particulate trap (22) and an air pump (20) that is connected to the exhaust pipe near the engine. The exhaust pipe (18) has a double-walled configuration where the exhaust travels within the pipe and air from the air pump travels within the space between the walls, capturing heat from the exhaust. This configuration also keeps the outside of the exhaust pipe (18) cool, improving safety and durability. Because the air entering the trap (22) is near the exhaust temperature, the burner requires less energy to raise the temperature of the particulates sufficiently to promote burning.