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Circular ball type electric booster steering device

An electric power steering, ball-type technology, applied in the direction of electric steering mechanism, mechanical steering gear, etc., can solve the problems of difficulty in coordinating low-speed steering portability, inability to adjust and control, poor steering wheel return ability, etc., to shorten production and development cycle, a high degree of assembly automation, and the effect of reducing steering force

Active Publication Date: 2008-07-02
BEIJING AUTONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional hydraulic power steering has the following problems: After the design of the selected parameters is completed, the power assist characteristics are determined, and adjustment and control cannot be performed. "; there is energy loss, even if the oil pump is not turning, the oil pump continues to work, which increases energy consumption; due to the oil leakage and maintenance problems of the hydraulic system itself, the maintenance cost is increased, and the hydraulic oil will also pollute the environment
Components such as oil pumps, pulleys, and hydraulic pipelines take up space and are difficult to arrange; low-temperature performance is poor

Method used

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  • Circular ball type electric booster steering device
  • Circular ball type electric booster steering device
  • Circular ball type electric booster steering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Such as figure 1 As shown, the electronic control unit according to the collected steering wheel torque T s Determine the target current Icmd of the booster motor with the vehicle speed V, and then perform feedback tracking control on the booster motor current according to the actual current I and target current Icmd of the booster motor.

[0024] Such as figure 2 As shown, one end of the torsion bar 5 is connected with the input end 4 of the steering gear, and the other end is rigidly connected with the screw rod 7 through an interference fit. Connected, and by cooperating with the spiral groove on the sliding sleeve 2, the axial movement is generated while the sliding sleeve 2 is rotating, and the axial movement of the sliding sleeve 2 is measured by the angular displacement sensor 6, and the relative deformation of the torsion bar 5, That is, the relative rotation angle between the input end 4 of the steering gear and the screw rod 7 is converted into an electric ...

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Abstract

The circular ball type electric booster steering device has, except screw, nut, gear sector, steel ball and other mechanical parts, torque sensor, boosting motor, decelerating mechanism, electronic controller unit, etc. The electronic controller unit determines the target current of the motor based on the steering disc torque and the vehicle speed to complete the feedback tracking control of the motor current. The decelerating mechanism has input connected to the motor and output connected to the screw or gear sector shaft in the circular ball steering unit. The present invention has saving in energy, provides proper power force fitting different running conditions, and has less parts, light weight, compact structure and high automation.

Description

Technical field [0001] The invention belongs to the technical field of automobile parts, and in particular relates to a recirculating ball type electric power steering device for vehicles. Background technique [0002] At present, the steering gear for vehicles is mainly divided into two types: rack and pinion type and recirculating ball type. The commonly used power steering is hydraulic power steering, and the power assist is controlled by a slide valve or a rotary valve. The traditional hydraulic power steering has the following problems: After the design of the selected parameters is completed, the power assist characteristics are determined, and adjustment and control cannot be performed. "; there is energy loss, even if there is no steering, the oil pump keeps working, which increases energy consumption; due to oil leakage and maintenance problems in the hydraulic system itself, the maintenance cost is increased, and the hydraulic oil will also pollute the environment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D3/08
Inventor 林逸施国标王建华申荣卫
Owner BEIJING AUTONICS TECH
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