Regulation method for a controllable energy absorber
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United States of America Patent
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Dec 24, 2013
Grant Date -
Feb 28, 2013
app pub date -
Apr 1, 2011
filing date -
May 10, 2010
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Abstract
The invention relates to a method for regulating the current flow of a coil that controls the viscosity of a magnetorheological fluid of a controllable energy absorber in a steering system for a motor vehicle, wherein during an accident the energy absorber acts as a hydraulic damper between two parts movable with respect to one another, whose damping force is determined by the current flow through the magnetic coil, wherein the following steps are provided:
- the relative velocity between a first part of the steering column movable with the steering wheel and a second part of the steering column fixed to the vehicle body is determined continuously or at intervals,the acceleration required for the braking from the measured relative velocity at standstill up to the end of the travel path is calculated,the current flow is calculated from the calculated acceleration in such a way that the value of the acceleration is approximately reached during the further travel of the parts movable with respect to one another.
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