Patent ID: 9657623
Date: 2017-05-23
CPC Classifications: F01N,F02M,Y02T

Claim:
1. An exhaust treatment device comprising: an engine room in which an internal combustion engine is disposed; an upstream catalytic converter that is disposed inside the engine room and is provided on an exhaust path through which exhaust discharged from the 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 upstream catalytic converter, and that cools the exhaust; a downstream catalytic converter that is provided on the exhaust path further toward a downstream side than the upstream catalytic converter; a vibration cut-off member that is provided on the exhaust path further toward a downstream side than the upstream catalytic converter and further toward an upstream side than the downstream catalytic converter, and that cuts-off vibrations from an inside of the engine room to the outside of the engine room; and a circulation pipe that branches off, inside the engine room, from a portion of the exhaust path between the upstream catalytic converter and the vibration cut-off member, and that is for circulating some of exhaust from the upstream catalytic converter to the internal combustion engine.