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Separated steering device for vehicular four wheels and its control method

A four-wheel independent steering and control method technology, which is applied to the steering mechanism, steering rod, vehicle components, etc., can solve the problems that the pure rolling of the vehicle cannot be guaranteed, and achieve the effects of improving space utilization, simplifying the mechanical structure, and reducing wear

Inactive Publication Date: 2005-11-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the steering trapezoidal mechanism, it is impossible to guarantee that the vehicle will do pure rolling around the steering center when turning

Method used

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  • Separated steering device for vehicular four wheels and its control method
  • Separated steering device for vehicular four wheels and its control method
  • Separated steering device for vehicular four wheels and its control method

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Experimental program
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Effect test

Embodiment Construction

[0024] The structure and principle of the present invention will be described in detail below according to the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention consists of a steering knuckle arm (5), a steering cylinder (4), an electro-hydraulic proportional valve (3), a proportional flow diverter valve (2), an accumulator (6), an overflow valve (7), a hydraulic pump (8) and filter (9), electronic control system are formed.

[0026] The steering of each wheel (1) of the vehicle is realized by driving the steering knuckle arm (5) by an independent hydraulic steering oil cylinder (4). The expansion and contraction of the steering cylinder controls the left and right turns of the wheels. The length of the telescoping controls the size of the steering angle.

[0027] The piston of the steering cylinder is connected to the steering knuckle arm that completes the steering work, and each steering cylinder is connected to each electro-hydraulic propo...

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PUM

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Abstract

The invention relates to domain of special purpose vehicle and especially to a separate four-wheel steering device of vehicle and controlling means, which is mainly used in steering system of special purpose vehicle to guarantee steering behavior. The device comprises steering knuckle arm, steering hydraulic cylinder, electro-hydraulic proportional control valves, and accumulator, easing valve, hydraulic pump, clarifier and electronic control system. The invention is characterized in that every wheel is controlled by independent oil-hydraulic cylinder, electronic control system comprises steering emulator, signal processor and measuring apparatus of displacement line and hydraulic pump driven by engine in steering hydraulic system controls hydraulic cylinder of steering system via electro-hydraulic proportional control valves of steering system. Hydraulic cylinder connects with linear movement pickup to feed variable of displacement line of hydraulic cylinder back to CPU. System adopts closed-loop control. Control circuit equips system failure diagnosis element to realize alarm when system steering error occurs and steering mode switching control unit to complete steering mode switching of vehicle.

Description

Technical field [0001] The invention relates to the field of special-purpose vehicles, in particular to a vehicle four-wheel independent steering mechanism and a control method thereof, which are mainly applied to the steering system of a special-purpose vehicle to ensure the steering performance of the vehicle. Background technique [0002] In recent years, with the rapid development of my country's automobile industry, the technical requirements for automobiles are also getting higher and higher. Four-wheel steering technology can improve handling stability at high speeds and improve vehicle maneuverability at low speeds. At present, four-wheel steering technology has been applied in some cars, SUVs, heavy trucks, special vehicles and special vehicles. [0003] The four-wheel steering mechanism used in the vehicle at present generally adopts a steering trapezoidal mechanism for the front wheels, and the rear wheels are controlled by oil cylinders to turn. Due to the mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D7/06
Inventor 田晋跃程振东
Owner JIANGSU UNIV
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