An Adaptive Shock Absorber for Electric Vehicles

Abstract

The invention discloses an adaptive shimmy damper applicable to an electric automobile. As the electric automobile adopts a wheel hub motor, wheels are heavy, and the electric automobile easily has serious shimmy in running. The adaptive shimmy damper comprises a piston rod, an inner cylinder barrel, an inner barrel end cover, a magnetic shielding side pipe, an outer cylinder barrel, an outer endcover, a coil assembly, an electromagnet group, an electro-hydraulic proportional directional throttling valve, an oil pipe and an electric auxiliary control module. The piston rod comprises a pistonbody and a connecting rod which are integrally formed. A permanent magnet is fixed into the piston body, a piston body ring and the inner cylinder barrel form a sliding pair, the induction coil assembly comprises a first induction coil and a second induction coil which are arranged on the outer side wall of the inner cylinder barrel, and the electromagnet group comprises a first electromagnet anda second electromagnet which are fixed to the outer end wall of a closed end of the inner cylinder barrel and the outer side face of the inner barrel end cover. Shimmy intensity is detected by electromagnetic induction of the induction coils.

Description

technical field [0001] The invention belongs to the technical field of automobile shock absorption, and in particular relates to an adaptive shock absorber suitable for electric automobiles. Background technique [0002] Under certain conditions, the steering system of ordinary automobiles will continuously swing the wheels around the steering kingpin, which will cause the swing of the side slip angle of the wheels. This form of vibration will be fed back to the steering wheel operated by the driver through the steering system, which will cause obvious swing of the vehicle body and even make the vehicle snake. This kind of vibration problem is defined as "shimmy vibration". For general passenger car systems, front wheel steering is mainly used, so the shimmy problem of steering wheels is also called "front wheel shimmy". [0003] The current automobiles basically adopt the integral steering gear of power steering. The steering system is mainly composed of upper and lower co...

AI Technical Summary

Problems solved by technology

The damper of this method has poor versatility, the damping working range is small, and the damping force cannot be adjusted during operation. In addition, for larger shimmy vibrations, the shimmy vibration must be realized by reducing the orifice and increasing the piston body. control, so that the volume of the shock absorber increases, and because the orifice is small, it is easy to cause blockage or failure and other faults in long-term use

[0005] In addition, the current control methods mostly adopt passive control, such as the passive oil-gas type shock absorber, which only uses the compression deformation of the gas and the friction energy generated by the oil through the small gap inside the damper to consume the external energy. Vibration energy caused by

Because there is no control system, the passive control shock absorber will not automatically adjust the damping to the external interference, so that when it encounters a large impact load, its shock absorption effect is very poor, and overload often occurs.

Therefore, this kind of shimmy reducer can only respond to local movements, and cannot achieve adaptive shimmy reduction, which makes it difficult to meet the shimmy reduction needs of today's intelligent vehicles

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