Free piston expander-linear generator vehicle waste heat recovery system based on composite power system

Abstract

The invention relates to a free piston expander-linear generator vehicle waste heat recovery system based on a composite power system, and belongs to the field of energy saving and emission reduction.A novel free piston expander-linear generator integrated unit is provided to serve as a thermoelectric conversion device, and the new vehicle waste heat recovery system is designed based on the composite power system; and by means of the system, engine exhaust energy is converted into high-grade electrical energy to be used for driving motors through the composite power system. The system can effectively improve the fuel economy of the engine, reduces fuel consumption, reduces CO2 and pollutant emission, meanwhile, prolongs the service life of a battery and meets the requirements of a vehicle-mounted power supply for high energy and high power.

Description

technical field [0001] The patent of the invention relates to a waste heat recovery system for a free piston expander-linear generator vehicle based on a composite power supply, which belongs to the field of energy saving and emission reduction. Background technique [0002] Energy is the driving force of social and economic development, and energy security is the basis for ensuring national security and sustainable development of the national economy. The growth of automobile production and ownership is bound to cause a large amount of energy consumption and severe environmental pressure. CO emissions from internal combustion engines used in vehicles 2 About the world's CO 2 1 / 4 of the total emissions. From the perspective of the energy balance of the internal combustion engine for vehicles, only 30%-45% (diesel engine) or 20%-30% (gasoline engine) of the total heat of fuel combustion is used for power output, and the rest of the energy is mainly discharged through the co...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the above-mentioned gasoline-electric hybrid vehicles and the hybrid vehicles formed by using the organic Rankine cycle system, such as: when the internal combustion engine works alone, the fuel utilization rate is low and the fuel consumption is high, about 1 / 3 Energy is released into the atmosphere through the exhaust

The specific power of the battery is small, the cycle life is short, the temperature characteristics are poor, and the mileage is short. The single use of the battery as the power source will cause impact damage to the battery when the vehicle has an instantaneous high power demand, especially for urban working conditions, where the vehicle has more frequent During the starting, acceleration and deceleration process, the power output of the battery fluctuates frequently and greatly, and the impact damage to the battery is more serious.

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