48V micro-hybrid braking energy recovery experiment system based on CVT speed ratio control

Abstract

The invention discloses a 48V micro-hybrid system braking energy recovery experiment system based on CVT speed ratio control. The brake energy recovery efficiency of a 48V micro-hybrid system is adjusted through CVT speed ratio control. A mechanical braking part and a motor braking part are designed according to the actual braking process in the braking process; the total braking forces required by different experiments are different, therefore, the mechanical braking part is required to output different braking forces; when the total braking force is large, a vacuum booster, a large-displacement hydraulic cylinder and other complex braking structures need to be used, a flywheel is an energy storage element of the device, and if the change of the total braking force is equivalent to the change of the mass of the flywheel, the design difficulty and cost can be greatly reduced, so that the assembled flywheel assembly is designed; the vibration problem of the system is considered, and a load bearing area and a damping structure are designed; a frame base is formed by combining sectional materials, so that disassembly, assembly and wiring are facilitated, and the size and the cost arereduced.

Description

technical field [0001] The invention belongs to the technical field of braking energy recovery of hybrid electric vehicles, and relates to a braking energy recovery experimental system of a 48V micro-mixing system based on CVT speed ratio control. Background technique [0002] With the increasingly stringent fuel consumption regulations in various countries, the trend of vehicle electrification is gradually accelerating. But at this stage, pure electric vehicles are still facing many problems, and both users and vehicle manufacturers need a more economical and convenient transition solution. Studies have shown that the 48V micro-hybrid system can improve fuel consumption by 10%-15%, but the input cost and development cycle are far lower than HEV and PHEV models, and the price is more competitive. At present, the HEV system has begun to build up patent barriers, and it is difficult to develop in the short term. As a low-cost solution, 48V micro-hybrid has a low technical thr...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the present invention uses a CVT controller to design a 48V micro-hybrid system braking energy recovery experimental system based on CVT speed ratio control, which considers adjusting the braking of the 48V micro-hybrid system through CVT speed ratio control. Energy recovery efficiency; in the braking process, the mechanical braking and motor braking parts are designed in imitation of the actual braking process; because the total braking force required by different experiments is different, the mechanical braking part needs to output different braking forces. When the total braking force is large, complex braking structures such as vacuum boosters and large-displacement hydraulic cylinders are required, and the flywheel is the energy storage element of the device. If the change in the total braking force is equivalent to the change in the quality of the flywheel, then It will greatly reduce the design difficulty and cost, so the present invention designs an assembled flywheel assembly; considering the vibration problem of the system, a load-bearing area and a shock-absorbing structure are designed; the frame base is formed by combining profiles, which is convenient for disassembly and wiring, and reduces Small size and cost

Images