EXHAUST TREATMENT DEVICE

摘要

A decrease in cost is devised at an exhaust treatment device that purifies exhaust from an internal engine by a catalyst that is heated from a catalyst support that generates heat by being energized, and that returns some of exhaust that has been purified to the internal combustion engine. A cooling member is provided at a portion of an exhaust pipe that is between an engine and an upstream catalytic converter, and a circulation pipe is branched-off from between the upstream catalytic converter and a vibration cut-off member that is at a downstream side.

主权项

1. An exhaust treatment device comprising:
a catalytic converter that is provided on an exhaust path through which exhaust discharged from an internal combustion engine passes, and that has a catalyst support that generates heat by being energized, and that purifies the exhaust by a catalyst supported by the catalyst support; a cooling member that is provided on a portion of the exhaust path from the internal combustion engine to the catalytic converter, and that cools the exhaust; a vibration cut-off member that is provided on the exhaust path further toward a downstream side than the catalytic converter, and that cuts-off vibrations from the internal combustion engine; and a circulation pipe that branches off from a portion of the exhaust path between the catalytic converter and the vibration cut-off member, and that is for circulating some of exhaust from the catalytic converter to the internal combustion engine.