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Motor Vehicle With Road Evaluation Device

A technology for motor vehicles and roads, applied in control devices, vehicle components, steering mechanisms, etc., to solve problems such as unsuitable driving styles

Active Publication Date: 2014-10-22
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem here is that a heavily adjusted running gear for a slippery road surface makes the driver feel that the road surface has better grip than it actually is and can thus induce him to take an unsuitable driving style

Method used

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  • Motor Vehicle With Road Evaluation Device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] figure 1 The steering wheel 1 of the motor vehicle shown is connected to a steering shaft 2 on which a steering angle sensor 3 and an electric motor 4 or other actuators for applying a torque to the steering shaft 2 are arranged. Power steering 5 receives the measured values ​​of steering angle sensor 3 and, on the basis of these measured values, controls a double-acting adjusting cylinder 6 , which controls the track angle of front wheels 8 of the motor vehicle via tie rods 7 .

[0018] exist figure 1 In the illustrated embodiment, there is no mechanical connection between the wheels and the steering wheel that would cause the driver to feel the force required to turn the front wheels directly on the steering wheel 1 . Instead, the feedback unit 18 of the power steering device 5 receives a feedback signal of the amount and direction of the adjustment force exerted by the adjustment cylinder 6 on the tie rod 7 and controls the electric motor 4 in order to exert a torqu...

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PUM

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Abstract

A motor vehicle including an adjustable steering assistance is disclosed. The adjustable steering assistance includes an evaluation unit for evaluating the grip of a road travelled, in which the extent of the steering assistance is variable as a function of the result of the road grip evaluation. The effectiveness of the steering assistance adjustment is due to the fact that the driver is accustom to the hand moment exerted on the steering wheel during steering, conventionally as a fixed relationship to the torque, which for steering the wheels of the motor vehicle has to be exerted thereon. Consequently, the lower the steering resistance the less road grip as a general rule. In that the extent of the steering assistance is varied, a road with less grip can thus be suggested to the driver in order to prompt him to a correspondingly careful driving style.

Description

technical field [0001] The invention relates to a motor vehicle with a device for determining the adhesion or the slip resistance of a road over which the motor vehicle travels. Background technique [0002] A vehicle of this type is described, for example, in DE 10 2004 036 087 A1. In such conventional vehicles, the control units for the running gear and instrumentation can be switched to a bad weather mode with the aid of data acquired from various sources in order to take into account the reduced road grip in bad weather. In bad weather mode, for example, the running gear should be adapted to smooth road surfaces or the maximum top speed should be limited. [0003] The problem arises here that the chassis, which is largely adjusted to the smooth road surface, makes the driver perceive that the road surface has better grip than it actually does, and thus induces him to adopt an unsuitable driving style. An automatic top speed limit can be perceived by the driver as an un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B60W40/068B62D137/00
CPCB62D5/0463B62D6/008B62D6/04B62D6/006B60W2550/148B60W2552/40
Inventor T·德根斯泰恩
Owner GM GLOBAL TECH OPERATIONS LLC
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