Method for determining the understeering ratio of a vehicle provided with electric power steering and for optionally correcting the power steering
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United States of America Patent
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Oct 28, 2014
Grant Date -
Dec 29, 2011
app pub date -
Dec 15, 2009
filing date -
Dec 19, 2008
priority date (Note) -
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Abstract
The invention relates to a method for calculating the understeering ratio of automobiles provided with electric power steering (EPS) including an electric assistance motor (9) driven by an onboard electronic computer (11), a sensor (12, 14) providing a first piece of information on a real angular position of the steering wheel (3), a wheel anti-lock braking system (ABS) providing a second piece of information on the speed of the wheels (15) of the vehicle, characterised in that the onboard computer (11) of the EPS processes the second piece of information for estimating a theoretical angular position of the steering wheel (3), which is further compared to the real angular position of the steering wheel (3) in order to derive the understeering ratio (τ) of the vehicle.
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