Switchable vehicle active/semi-active suspension

A semi-active suspension and active technology, applied in the direction of suspension, elastic suspension, vehicle components, etc., can solve the problems of fixed uncontrollability, complex structure, and high requirements of external conditions, achieve significant vibration reduction effect, and have wide application prospects , the effect of wide working range

Inactive Publication Date: 2006-08-02
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the fixed uncontrollability of the passive suspension, the large energy consumption of the active suspension, the complex structure, and the high cost, as well as the characteristics of the semi-active suspension of the vehicle currently developed, such as the complex structure, poor reli...

Method used

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  • Switchable vehicle active/semi-active suspension
  • Switchable vehicle active/semi-active suspension

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Embodiment Construction

[0024] The vehicle semi-active suspension of the present invention is mainly composed of a spring, a hydraulic cylinder, a hydraulic motor, a controller and a brushless motor. Two specific design schemes of the device are given here for reference.

[0025] Selected vehicle (suspension) basic parameter value range: single suspension mass (body mass) m s = 150kg, non-suspension mass (mass such as wheels) m u =35kg, tire stiffness k t = 160000 N / m.

[0026] Reference design scheme one:

[0027] According to the load condition of the suspension, a single-rod double-acting hydraulic cylinder 2 is selected, the inner diameter of the cylinder is about 40mm, and the rod diameter is about 25mm. Gear hydraulic motor 3 (pump) is selected as the actuator: GM5-5 gear motor (also hydraulic pump), theoretical displacement 5.2ml / r, rated pressure 20Mpa, maximum speed 4000r / min, minimum speed 800r / min, Weight 1.9kg. The spring 9 is a helical compression spring: the inner diameter of the ...

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Abstract

One kind of switchable active/semi-active suspension system for vehicle superior to available ones, which have complicated structure, lower reliability and strict operation conditions, is provided. The electronically controlled switchable active/semi-active suspension system for vehicle includes mainly a hydraulic cylinder and a spring connected to the vehicle frame and axle separately, a hydraulic motor connected via pipeline to the hydraulic cylinder, a DC motor connected through a back coupling to the hydraulic cylinder, an accumulator connected to the DC motor, and a controller installed between the motor and the accumulator. The electronically controlled switchable active/semi-active suspension system has simple structure, high reliability, wide operation range, the functions of both active suspension and semi-active suspension, and wide application foreground.

Description

Technical field [0001] The invention belongs to a vehicle damping device, in particular to a vehicle suspension adopting an electronically controlled damping system. Background technique [0002] The automobile suspension system is the key to improving vehicle ride comfort (riding comfort) and safety (handling stability), reducing dynamic loads to avoid damage to parts, and the suspension system generally consists of springs and dampers. At present, automobile suspensions are divided into three categories: passive suspensions, semi-active suspensions, and active suspensions. [0003] The spring and damper of the passive suspension do not consume external energy during work, and are passively adjusted only by inherent characteristics, which has the advantage of low cost; the active suspension has no fixed elastic characteristics and damping characteristics, and the spring and damper are controlled by the actuator Instead, the actuator can actively respond according to the st...

Claims

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Application Information

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IPC IPC(8): B60G13/16B60G17/08
Inventor 方宗德芦刚李声晋李建华赵宁寇发荣
Owner NORTHWESTERN POLYTECHNICAL UNIV
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