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Steering mechanism for vehicular drive-by-wire system and its steering drag simulator

A technology of steering mechanism and steering resistance, applied to electric steering mechanism, etc., can solve the problems of increasing the difficulty of processor ECU, complex control, and complex system control algorithm development, so as to reduce the complexity of research and development, save hardware costs, and simplify The effect of control

Active Publication Date: 2006-12-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the traditional wire-by-wire steering system realizes the "road sense" and steering return functions by using the control unit to control the steering wheel feedback motor, the control is complicated, which makes the development of the system control algorithm complex and increases the difficulty of the development of the processor ECU.

Method used

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  • Steering mechanism for vehicular drive-by-wire system and its steering drag simulator
  • Steering mechanism for vehicular drive-by-wire system and its steering drag simulator
  • Steering mechanism for vehicular drive-by-wire system and its steering drag simulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. The steering resistance simulation device of the wire-by-wire steering mechanism mainly includes the following components: a steering column 101 (connected to the steering wheel), a steering resistance simulator housing 104, a first elastic member, a second elastic member, a thrust nut 110, an upper Support 105 and lower support 115. The first elastic member can be a spring, such as an extension spring or a torsion spring, or other elastic members. The first elastic member in this embodiment is an extension spring located on the opposite side of the thrust nut 110 (that is, it is generated by stretching or compressing). Elastic deformation), referred to in this embodiment as the upper end spring 107 and the lower end spring 113, and the upper end spring 107 and the lower end spring 113 have the same stiffness, length and installation parameters, the length of the elastic member refers to the elastic member in the state of no elastic deformation below the n...

Embodiment 2

[0033] Embodiment 2. In order to make the steering wheel have a better steering "road feel" when the vehicle is turned away from the middle position, as the best embodiment of the present invention, a friction resistance elastic sleeve is added on the basis of Embodiment 1, such as figure 2 ,, 3, 4 shown. The friction resistance elastic sleeve 120 is looped on the outside of the steering column 101, and the friction resistance elastic sleeve 120 is fixed on the adjustment nut 118 ( figure 2 (not shown), the adjusting nut 118 is fixed on the housing 104 , so that the friction resistance elastic sleeve 120 is fixed on the housing 104 . Friction resistance elastic sleeve 120 is an open elastic sleeve, such as image 3 , 4 As shown, its inner wall is pasted with a friction plate 121, and there are two holes at the opening roll ear. The through hole 122 close to the adjusting nut 118 is a threaded hole 123 far away from the adjusting nut 118 , which is threaded and connected w...

Embodiment 3

[0034] Embodiment three, such as Figure 5 As shown, the difference from Embodiments 1 and 2 is that there is only one spring as the first elastic member, which is fixed on the upper side or the lower side of the thrust nut 110 , and the stretching stiffness of the spring is the same as the compression stiffness. When the steering wheel is turned, the steering resistance torque can also be generated to realize the functions of steering "road feel" and steering back.

[0035] The first elastic member in the above embodiment can also be a torsion spring, one end of the torsion spring is fixed on the casing, and the other end is fixed on the steering column, and corresponding deformation occurs with the rotation angle of the steering column to hinder the rotation of the steering column , resulting in a steering resistance torque.

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Abstract

The present invention discloses a vehicle wire-transmit steering mechanism and steering resistance simulator, which includes steering wheel and its position sensor. The steering resistance simulator includes a steering element and a first resilient element. One end of the steering element is rotationally connected with the steering wheel, and the other end is connected with the position sensor. Corresponding elastic deformation of the first resilient element is generated under the rotating operation of the steering element. Restoring force of the elastic deformation acts on the steering element and generates torque for enabling rotation of the steering element. Steering 'road sense' and correcting function of the inventive wire-transmit steering mechanism can realize simplicity and reliability. Requirement for motor and sensor of the wire-transmit steering mechanism are reduced. Hardware constitution for system is simple, and the cost is decreased. Essential control algorithm of the wire-transmit steering mechanism only relates to steering function, control is simple and realization is easy, then R.&D. difficulty of electric control unit (ECU) is reduced.

Description

【Technical field】 [0001] The present invention relates to a steering mechanism of a steering by wire (Steer by wire) system used in light and medium-sized vehicles. By using the steering mechanism, a "road feel" and a steering wheel similar to the real steering process can be realized on the steering wheel. Auto-correction function. 【Background technique】 [0002] In light- and medium-duty vehicles with steer by wire (Steer by wire) systems, there is no direct mechanical connection between the steering wheel and the transmission of the steered wheels. Traditional drive-by-wire technology such as figure 1 As shown, it includes a steering wheel 1, a steering wheel position sensor 2, a steering wheel torque sensor 3, a steering wheel feedback motor 4, a steering wheel drive motor 5, a steering wheel torque sensor 6, a steering wheel position sensor 7, a steering wheel 8, a steering wheel transmission 9, Electronic Control Unit (ie ECU). The main control signals transmitted i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
Inventor 杨春伟
Owner BYD CO LTD
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