Waste heat recovery device for oil-electric hybrid vehicle

Abstract

The invention relates to a waste heat recovery device for an oil-electric hybrid vehicle and belongs to the technical field of waste heat recovery. High-temperature tail gas enters an evaporator through an exhaust pipeline after being exhausted out of an internal combustion engine, heat is transferred to a liquid organic working medium, and the liquid organic working medium is turned into a high-temperature high-pressure gaseous organic working medium. Through control of a collection control unit over an electromagnetic valve, the high-temperature high-pressure gaseous organic working medium flows into a free piston expander, expands to work, and pushes a piston to reciprocate. After working in the free piston expander, the high-temperature high-pressure gaseous organic working medium is turned into a low-temperature low-pressure organic working medium, the low-temperature low-pressure organic working medium is discharged out of the free piston expander, flows through a condenser and is condensed into the liquid organic working medium, and the liquid organic working medium flows back to a liquid storage tank. In the reciprocating process, the piston in the free piston expander drives a permanent magnet type cylindrical linear generator rotor to conduct magnetic induction line cutting movement to generate electric energy for charging a storage battery of the oil-electric hybridvehicle, and power output is achieved again. By means of the waste heat recovery device for the oil-electric hybrid vehicle, waste heat of the tail gas can be efficiently recovered for charging the storage battery, and thus environment pollution and charging cost are reduced.

Description

technical field [0001] The invention relates to a waste heat recovery device that can be used for a hybrid electric vehicle, and specifically relates to the field of energy saving and emission reduction of an internal combustion engine, which can efficiently recover waste heat from the exhaust of the internal combustion engine of the hybrid electric vehicle and convert it into electric energy for power output. Background technique [0002] The pollution caused by automobile exhaust to the atmospheric environment is becoming more and more serious, and it has become one of the most difficult and urgent problems in the atmospheric environmental pollution. The development and popularization of new energy vehicles is an inevitable trend to realize the security of my country's energy strategy and maintain the sustainable development of the automobile industry. Hybrid vehicles have received the favor of the majority of automobile manufacturers due to their superior performance and g...

AI Technical Summary

Problems solved by technology

However, there are still some problems in gasoline-electric hybrid vehicles, such as: when the internal combustion engine works alone, the fuel utilization rate is low. From the perspective of the energy balance of the internal combustion engine for vehicles, it is only 30%-45% (diesel engine) or 20%-30% (Gasoline engine) The total heat of fuel combustion is used for power output, friction loss and mechanical loss are about 10% of the total heat of fuel combustion, and the rest of the energy is mainly discharged into the atmosphere through cooling medium and high-temperature exhaust gas, causing serious energy waste; When the power source is a high-power battery and the mileage is long, it is necessary to pre-charge the battery for a long time, resulting in high charging costs, etc.

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