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Automobile electro-hydraulic intelligent steering system and multi-target optimization method thereof

An intelligent steering and electro-hydraulic technology, which is applied in the direction of electric steering mechanism, steering mechanism, steering rod, etc., to achieve good driving feeling, good global optimization and good convergence

Active Publication Date: 2019-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Claims
  • Application Information

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Problems solved by technology

The present invention proposes an electro-hydraulic intelligent steering system that combines electric power steering and electro-hydraulic power steering, and considers the electromechanical-hydraulic coupling relationship for multi-objective optimization, which solves the problem that the automobile steering system is difficult to simultaneously take into account low energy consumption and sufficient power assistance , the problem of proper road sense

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  • Automobile electro-hydraulic intelligent steering system and multi-target optimization method thereof
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  • Automobile electro-hydraulic intelligent steering system and multi-target optimization method thereof

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Embodiment Construction

[0059] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0060] refer to figure 1 As shown, an automobile electro-hydraulic intelligent steering system of the present invention includes: a mechanical steering module, an electric power assist module, an electrohydraulic power assist module and a control module;

[0061] The mechanical steering module includes a steering wheel 1, a torsion bar 2, a lower column 5, a steering pinion 6, a steering rack 7, and a wheel unit 8 connected in sequence;

[0062] The electric booster module includes a booster motor 20 and a worm gear reducer 21; the output end of the booster motor 20 is connected to the worm gear reducer 21, and the worm gear reducer acts between the torsion bar 2 and the lower pipe column 5,...

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Abstract

The invention discloses an automobile electro-hydraulic intelligent steering system and a multi-target optimization method thereof. The system comprises a mechanical steering module, an electric powerassisting module, an electric hydraulic power assisting module and a control module. The system can intelligently select the power-assisted steering participation proportions of the electric power assisting module and the electric hydraulic power assisting module. According to a mechanical, electric and hydraulic complex coupling relationship existing in the system, the multi-target optimizationmethod is proposed, through parameter coupling analysis, key design variables greatly affecting the performance of the system are selected, a multi-target particle swarm algorithm based on the sharedniche technology is adopted for optimization, optimal design parameters are obtained, performance optimum of the steering road sense, steering energy consumption and steering power assisting is achieved, and the overall performance of the steering system is improved.

Description

technical field [0001] The invention belongs to the technical field of automobile steering systems, and specifically refers to an automobile electro-hydraulic intelligent steering system and a multi-objective optimization method thereof. Background technique [0002] Automobile steering system has gradually developed from mechanization to hydraulic and electronic, which not only reduces the driver's manipulation burden, obtains a comfortable driving feeling, but also reduces steering energy consumption and enhances driving safety. Among the existing automobile steering systems, electro-hydraulic power steering systems and electric power steering systems are the most widely used. The electric hydraulic power steering system still has the inherent energy loss of the hydraulic system, which leads to high steering energy consumption. The electric power steering has better energy-saving characteristics, but the high-speed road feeling is not as good as the hydraulic steering, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D5/06B62D3/12B62D6/00B62D137/00
CPCB62D3/12B62D5/04B62D5/06B62D6/00
Inventor 周小川赵万忠汪桉旭栾众楷王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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