Heating device for component of exhaust gas after-treatment system for internal combustion engine e.g. diesel engine, has heat pipe that is extended as bypass line to diesel particulate filter in catalytic converter

摘要

The heating device (24) comprises a selective catalytic reduction (SCR) catalytic converter (18) provided with a diesel oxidation catalyst (12) and a diesel particulate filter (14). A heat pipe is extended as a bypass line to the diesel particulate filter. The heat pipe is equipped with an entry-side heat exchanger (20), an exit-side heat exchanger (26) and a controllable valve (22). The exit-side heat exchanger is arranged before the entry of the heat pipe.