A piston thermoelectric power generation device based on temperature feedback control

Abstract

The present invention discloses a piston thermoelectric power generation device based on temperature feedback control. Thermoelectric power generation is carried out by using residual heat on the inner top surface of a piston. The piston thermoelectric power generation device based on temperature feedback control mainly comprises a thermoelectric module, an integrated voltage stabilizing circuit, a super capacitor energy storage device, a step-up step-down DC / DC circuit, a load, a cooling device, a solenoid valve, a piston pin, a connecting rod, a first thermocouple, a second thermocouple and a micro control unit MCU. A hot end of the thermoelectric module fits with the inner top surface of the piston, and a cold end of the thermoelectric module fits with the upper surface of an oil chamber of the cooling device. Machine oil is used to forcibly cool the cold end of the thermoelectric module. The invention solves the power supply problem for the narrow inside space of the piston, and provides electric energy support for piston optimization design. In the invention, the machine oil is used to cool the cold end of the thermoelectric module, thereby reducing the temperature of the cold end of the thermoelectric module and increasing the generated power. The oil is supplied in a circular manner for the purpose of cooling only when the temperature difference between both ends of the thermoelectric module is below the limit, thereby reducing the load of a machine oil pump. The present invention has no effect on normal operation of an internal combustion engine.

Description

technical field [0001] The invention relates to the field of waste heat utilization of internal combustion engines, more precisely, the invention relates to a piston thermoelectric power generation device based on temperature feedback control. Background technique [0002] Only 25% of the heat generated by the fuel combustion of the automobile internal combustion engine is converted into useful work output, 5% of the mechanical loss is removed, and the remaining 70% of the heat is taken away by the cooling water and exhaust gas and dissipated in vain. Forced heat transfer will generate a significant portion of the energy. It is very meaningful to use this part of energy to power the automotive equipment. [0003] Thermoelectric power generation can convert the waste heat of the internal combustion engine into electrical energy, realize energy reuse, and achieve energy-saving effects. At present, the research on internal combustion engine pistons is gradually increasing, su...

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Problems solved by technology

Without exception, these studies need to solve the problem of the internal power supply of the piston, and the piston is inside the engine, and it performs high-speed reciprocating linear motion during the working process. If the ordinary line connection method is used, the power line is introduced from the outside of the piston, one end is fixed, and the other end moves. , poor reliability, and how to arrange it is a big problem

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