Electro-hydraulic proportional hybrid energy recovery control system for motor vehicle

Abstract

The invention relates to an electro-hydraulic proportional hybrid energy recovery control system for a motor vehicle, in particular to equipment of electro-hydraulic proportional hybrid energy recovery control system for the motor vehicle. A first pump is respectively communicated with a first energy accumulator, a fourth cartridge valve and a first one-way valve. A second cartridge valve is communicated with a pressure-compensated valve which is communicated with a proportional cartridge valve, a first electromagnetic ball valve is communicated with a spring cavity of the first cartridge valve, a sequence valve is communicated with a spring cavity of a third cartridge valve and a third electromagnetic ball valve, a third one-way valve is communicated with a fourth pump, a spring cavity of the fourth cartridge valve is communicated with a direct-acting overflow valve and a proportional overflow valve, and the other end of each of the four pumps is communicated with a hydraulic oil tank. The system has the advantages of simple structure, usage of the cartridge valves, high integration, small size, freeness of leakage, stability and reliability in operation, stability in operation of the vehicle, reduction of air pollution and wide application.

Description

technical field [0001] The invention relates to a motor vehicle electro-hydraulic proportional hybrid energy recovery control system, in particular to equipment for the motor vehicle electro-hydraulic proportional hybrid energy recovery control system. Background technique [0002] At present, most motorized construction vehicles and traffic vehicles use internal combustion engines to mechanically transmit power, and the energy loss is high. Usually, the braking energy accounts for 43% of the total energy of the vehicle during driving, and this part of energy is completely wasted in traditional vehicles. When the vehicle starts, it needs a large torque output, which releases a large amount of exhaust gas and causes air pollution. When the vehicle stops, the kinetic energy of its operation is converted into heat energy and released, resulting in energy waste. The existing hybrid power system adopts electric hybrid power and uses batteries to store excess energy, but the batte...

AI Technical Summary

Problems solved by technology

[0002] At present, most motorized construction vehicles and traffic vehicles use internal combustion engines to mechanically transmit power, and the energy loss is high. Usually, the braking energy accounts for 43% of the total energy of the vehicle during driving, and this part of energy is completely wasted in traditional vehicles.

When the vehicle starts, it needs a large torque output, which releases a large amount of exhaust gas and causes air pollution. When it stops, the kinetic energy of its operation is converted into heat energy and released, resulting in energy waste

The existing hybrid power system adopts electric hybrid power and uses batteries to store excess energy, but the battery life is relatively short, the price is relatively high, and the disposal cost of waste batteries is also high; current research also uses hydraulic hybrid power However, they all use plate-type on-off valves, which have a large volume and weight, increase the weight of the vehicle, and are also prone to leakage, causing road pollution, inaccurate flow control, and unable to control the uniform rotation of the pump, especially when starting on a ramp. When the speed of the vehicle is not easy to control, it is easy to rush forward, and finally achieve the speed required for the smooth start of the vehicle.

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