Energy self-supply automobile exhaust gas circulation processing device

Abstract

Aiming at the energy waste caused by the exhaust emission of about 30%∼40% of the automobile engine energy and the exhaust emission caused by the failure of the three-way catalytic converter to reach the working temperature during the start-up of the automobile, our team proposes a design scheme for energy reuse and exhaust gas treatment of automobile exhaust pipes. The work has the characteristics of simple structure, low cost and strong pertinence, and achieves energy conservation and reduction of air pollution caused by exhaust emissions. The main body of this work consists of an energy conversion system and an exhaust gas circulatory system. Energy conversion system: The heat of the exhaust cylinder wall is reused by the thermoelectric power generation sheet. In order to convert thermal energy into electrical energy with higher efficiency, a heat sink is used to increase the temperature difference between the inside and outside of the thermoelectric power generation chip. The secondary energy utilization can realize the autonomous operation of the exhaust gas circulation system. Exhaust gas circulation system: The system is automatically controlled by single-chip microcomputer STM32F10XX. When the vehicle starts, the automobile exhaust gas would not meet the emission standard. At this time, the exhaust gas is passed into the exhaust gas storage bag, and the temperature of the three-way catalytic converter is monitored by the temperature sensor. When the operating temperature of the three-way catalytic converter is reached, the exhaust passage will be converted by the single-chip microcomputer, and the automobile exhaust gas will be discharged into the air. At the same time, the non- standard exhaust gas in the exhaust gas storage bag is again introduced into the three- way catalytic converter for secondary catalysis by using a micro-extractor. This avoids the situation that the temperature of the three-way catalyst is low and the catalytic efficiency is low, resulting in substandard exhaust emissions.