Electric automobile hub hydraulic motor driving system

Abstract

The invention discloses an electric automobile hub hydraulic motor driving system. The system comprises wheels (8), a storage battery pack (3), a DC / DC converter (2), a motor (4), an electric controlunit (1), a hydraulic transmission system and a stepless speed change automatic control system, wherein the hydraulic transmission system comprises an oil tank (5), a one-way variable pump (6), two high-speed switch valves (10) of a left wheel loop and a right wheel loop, two reversing valves (7) and two hub hydraulic motors (9), which are connected through oil pipes; and the stepless speed changeautomatic control system comprises a wheel speed sensor (13), an accelerator pedal position sensor (11), a brake pedal position sensor (15), a speed change controller (14) and a pulse modulator (12).The stepless speed change of the electric automobile can be realized, a speed reducer and a differential mechanism are omitted, the unsprung mass of the automobile is reduced, the spatial arrangementof the motor and a power supply is flexible, and the integrated control of driving, braking and steering of the electric automobile is easy to realize.

Description

technical field [0001] The invention relates to a driving system of an electric vehicle, in particular to a driving system of a wheel hub hydraulic motor of an electric vehicle. Background technique [0002] The shortage of oil resources, environmental pollution, traffic accidents and other problems brought about by the development of the automobile industry have become increasingly prominent, and electric vehicles have incomparable advantages in terms of energy saving, environmental protection and performance. , is an effective way to solve the above problems. In-wheel motor-driven electric vehicles install the drive motors distributedly in each drive wheel, which has outstanding advantages such as short drive transmission chain, high-efficiency transmission, and compact structure. At the same time, it has excellent dynamic control performance, which can effectively reduce vehicle energy consumption and improve vehicle performance. Active safety performance is an important...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to solve the problem that the wheel-side mechanism of an electric vehicle driven by a hub motor is complex in structure, the unsprung mass is large, the size and mass of the motor are greatly limited, and the spatial arrangement of the motor and power supply is inflexible. With the advantages of small size, light weight, quick response, stable transmission, large transmission torque, and flexible space layout, a hub hydraulic motor drive system for electric vehicles is proposed by replacing the hub motor with the hub hydraulic motor

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