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Method for detecting hands on steering wheel

A technology of steering wheel and function, which is applied to the steering control, measuring device, steering mechanism and other directions installed on the car to achieve the effect of cost saving

Active Publication Date: 2022-03-29
TRW AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, additional sensors cause additional cost

Method used

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  • Method for detecting hands on steering wheel
  • Method for detecting hands on steering wheel
  • Method for detecting hands on steering wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] motor vehicles in figure 1 The steering system 10 shown in the figure is designed as an electromechanically assisted steering system. The steering system 10 comprises an upper part 12 with a steering wheel 14 , a steering column 16 with a torsion bar 17 and a measuring device 18 , and a lower part with an auxiliary motor 20 .

[0034] If the driver applies a torque to the steering wheel 14 , this turns the steering column 16 . The measuring device 18 determines the torque acting on the torsion bar 17 from the relative angle between the upper (steering wheel-side) end and the lower end of the torsion bar 17 . Furthermore, an angular position sensor of the auxiliary motor 20 determines the angle of rotation of the lower end of the torsion bar 17 .

[0035] Based on the determined torque acting on torsion bar 17 and the angle of rotation of the lower end of torsion bar 17 , auxiliary motor 20 is controlled in such a way that it provides a suitable auxiliary torque for st...

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PUM

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Abstract

The invention relates to a method for detecting a driver's hands on a steering wheel (14). At least one part of a steering system (10) of a motor vehicle is modeled by means of a mathematical model. Furthermore, the angle of rotation of the lower and / or upper end of the torsion bar (17) of the steering system (10) is determined. The torque acting on the torsion bar is determined by means of a measuring device (18). Estimates with the aid of a Kalman filter the sum of the torque with which the driver loads the steering wheel (14) and the counter torque which is generated by friction in the upper part (12) of the steering system (10) . Furthermore, the counter torque is estimated, and the sum of the estimated torque and the counter torque is used to determine whether the driver's hands are on the steering wheel (14).

Description

technical field [0001] The invention relates to a method for detecting a hand on a steering wheel of a driver of a motor vehicle, in particular a motor vehicle with an electromechanically assisted steering system. Background technique [0002] In motor vehicles with an electromechanically assisted steering system, the electromechanical steering assistance device can act on the steering system with a torque and thus assist the driver when steering or steer the motor vehicle in a defined direction. In particular, electromechanical steering assistance devices can also steer the vehicle in a defined direction automatically, ie without a corresponding steering movement by the driver, for example based on data from a camera or other sensors. The automatic steering of a motor vehicle is used in particular in the control system of an at least partially autonomous motor vehicle. An example of such a control system is the so-called lane keeping assist system, which assists the driver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D1/28B62D15/02
CPCB62D1/286B62D15/0215B62D15/024G01L3/10G01L5/221
Inventor E·法施扎德T·奥斯特温德A·路恩根D·兹默曼
Owner TRW AUTOMOTIVE GMBH