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Power-assisted steering control method ensuring the computerised protection of the steering tie-rods

A control method and computer technology, applied to automatic steering control components, steering mechanisms, electric steering mechanisms, etc., to achieve the effect of reducing the weight of tie rods, saving materials and vehicle weight

Active Publication Date: 2015-08-12
JTEKT EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the disadvantages of manufacturing known steering devices stems from the structure and dimensions of the tie rods, which in fact have to satisfy two contradictory criteria

Method used

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  • Power-assisted steering control method ensuring the computerised protection of the steering tie-rods
  • Power-assisted steering control method ensuring the computerised protection of the steering tie-rods
  • Power-assisted steering control method ensuring the computerised protection of the steering tie-rods

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Embodiment Construction

[0027] Generally speaking, the invention relates to a power steering device 1 for a moving vehicle, in particular a motor vehicle, such as a wheeled vehicle for transporting people and / or goods.

[0028] as attached figure 1 As shown, the steering device 1 includes a steering wheel 2 connected to a steering column 3, and the end of the steering column 3 away from the steering wheel 2 is provided with a steering gear, which engages with a steering rack (not shown), and the steering gear Bar is installed in the steering box 4.

[0029] The opposite ends of the rack are respectively connected to the wheel hub carrier (not shown) of the left steering wheel 9 and the right steering wheel 10 of the vehicle through the left steering tie rod 5 and the right steering tie rod 6, each steering tie rod It is equipped with a left steering ball joint 7 and a right steering ball joint 8 at its outer end.

[0030] Advantageously, in order to assist the driver to apply manpower to the steeri...

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PUM

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Abstract

The invention concerns a control method for a power-assisted steering module, said method comprising a step (a) of assessing the steering wheel torque which involves obtaining an indicator signal representative of the intensity of the steering wheel torque (Cvolant) exerted by the driver on the steering wheel, a monitoring step (b) which involves comparing the indicator signal, representative of the intensity of the steering wheel torque (Cvolant), to a pre-defined alert threshold (C1), then, if said indicator signal becomes higher than or equal to said alert threshold (C1), a step (c) of reducing the assistance which involves reducing the intensity of the assistance torque (Cassist) provided by the assistance motor (12), such that the sum of the steering wheel torque (Cvolant) and the assistance torque (Cassist) remains lower than or equal to a pre-defined critical operating torque, in order to preserve the steering tie-rods from plastic deformation.

Description

technical field [0001] The present invention relates to the general field of power steering devices for various types of vehicles. Background technique [0002] Typically, a steering device includes a steering wheel that allows the driver to manipulate a steering column that is geared to a steering rack that is slidably mounted in the steering box and whose ends The tie rods are attached to the tie rods, which engage the steering knuckles to turn the wheels of the vehicle. [0003] Typically, the steering device is also provided with an auxiliary module comprising an auxiliary motor, such as an electric motor, for example via a worm or worm gear reducer, transmitting torque for the auxiliary gear. [0004] One of the disadvantages of manufacturing known steering devices stems from the structure and dimensions of the tie rods, which actually have to satisfy two contradictory criteria. [0005] Indeed, said tie rods first of all have a resistance to plastic deformation, more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
CPCB62D5/0469B62D5/0463B62D5/0481B62D6/10
Inventor 纪尧姆·棱格雷
Owner JTEKT EURO