Method and device for temperature management of exhaust purification equipment

Abstract

The present invention provides a method and a device for temperature management of an exhaust purification equipment. The invention relates to a method for temperature management in an exhaust channel of an internal combustion engine, wherein at least one thermoelectric generator is equipped in the exhaust channel or the exhaust purification equipment. The operation mode of the thermoelectric generator comprises: in temperature management of the exhaust purification equipment, when exhaust flow in the exhaust channel or for controlling the exhaust purification equipment, an achievable heating or cooling capacity of the thermoelectric generator and cooling capacity of additional components for cooling the thermoelectric generator are considered. The invention also relates to a device for temperature management of exhaust purification equipment in an exhaust channel of the internal combustion engine. Through totally including cooling or heating capability of the thermoelectric generator in the operation mode of the exhaust purification equipment, the efficiency of the exhaust purification equipment is improved, temperature management is improved and fuel consumption is reduced. The method and the device can be particularly used in an Otto engine or a diesel engine advantageously.

Description

technical field [0001] The invention relates to a method for temperature management of an exhaust gas purification system in an exhaust gas duct of an internal combustion engine, wherein at least one thermoelectric generator is installed in the exhaust gas duct or on the exhaust gas purification system. [0002] The invention also relates to a corresponding device for carrying out the method. Background technique [0003] In the context of improving the energy utilization of vehicle fuels, efforts are being made to utilize the energy contained in the hot exhaust gases. One option is thermoelectric generators (TEGs), which are mounted on components in the exhaust passage of an internal combustion engine. Thermoelectric generators exploit semiconductor materials such as Bi due to the Seebeck effect 2 Te 3 , PbTe, SiGe, BiSb, FeSi 2 A voltage difference is generated across the semiconductor material if two parts of an object made of these semiconductor materials have differ...

AI Technical Summary

Problems solved by technology

However, the prior art does not deal with the use of thermoelectric generators at all or is only insufficiently included in the operating strategy for exhaust gas aftertreatment

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