Device and method for monitoring the turn command to a steered rear wheel

A steering control and rear steering technology, applied in the control system field of ground vehicles, can solve problems such as intractability, expensive hardware and software components, and achieve the effect of increasing vehicle safety and reducing risks

Inactive Publication Date: 2009-08-26
RENAULT SA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Full redundancy of hardware and software components would result in an overly expensive and cumbersome solution

Method used

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  • Device and method for monitoring the turn command to a steered rear wheel
  • Device and method for monitoring the turn command to a steered rear wheel
  • Device and method for monitoring the turn command to a steered rear wheel

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no. 1 example

[0077] According to the first embodiment, the symbols are determined as:

[0078] sign(α 2-static ) = sign(α 1 )if 0

[0079] sign(α 2-static )=-sign(α 1 )if Tgs>l (2)

[0080] alpha 2-static ≈0 if Tgs=1 (3)

[0081] Therefore, if these three relations are not satisfied, an error is notified.

[0082] In order to monitor the absolute value of the static steering setting, the monitoring system 29 establishes straight lines illustrating the upper and lower limits of said value.

[0083] Upper limit: |α 2upper bound |=|(1-Tgs)α 1 |+b1 (4)

[0084] Lower limit: |α 2lower bound |=|(1-Tgs)α 1 |+b2 (5)

[0085] where b1=-(1-Tgs)*d, and b2 is calculated such that the lower limit is parallel to the upper limit and tangent to the lower limit curve

[0086] |α 2-static Nominal|, see Figure 4 .

[0087] Therefore, for all Tgs≠1, the monitoring system 29 checks

[0088] |(1-Tgs)α 1 |+b2≤|α 2-static |≤|(1-Tgs)α 1 |+b1 (6)

[0089] And if Tgs≈1, the monitorin...

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Abstract

Device and method (29) for monitoring the turn command to the steered rear wheel (5) of a vehicle (1) with at least three steered wheels, in which a steering angle datum value for the steered rear wheel (5) is compared against a template, said comparison being made by the computer that generates the datum value.

Description

technical field [0001] The invention relates to the field of control systems for ground vehicles, in particular wheeled motor vehicles. Background technique [0002] Traditionally, a motor vehicle has a chassis, a cabin, wheels connected to the chassis by a suspension mechanism, wherein the front steering wheels are controlled by a steering wheel that can be manipulated by the driver in the vehicle cabin. [0003] Document FR-A-2 681 303 describes a rear steering control device for a motor vehicle with four steered wheels, comprising a plate forming a cam and two small wheels placed in the same mid-plane of the vehicle, said The midplane includes the longitudinal axis of the rear guide rods that control the rotation of the rear wheels. [0004] The document also describes that in order to obtain the best possible road behavior of the vehicle, it is necessary to deflect the rear wheels in the same direction as the front wheels to obtain a steering wheel deflection angle belo...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B62D7/15
CPCB62D7/159
InventorP·加西亚·埃斯特班内斯S·盖冈
OwnerRENAULT SA