Fluid-pressure and analogous brake systems – Speed-controlled – And traction control
Patent
1997-06-30
2000-01-18
Le, Mark T.
Fluid-pressure and analogous brake systems
Speed-controlled
And traction control
303150, 701 80, B60T 824
Patent
active
060151927
ABSTRACT:
A system for a wheeled vehicle includes sensors for determining wheel speed, wheel load and wheel longitudinal driving or braking force of each wheel, and an estimating or controlling unit for estimating a vehicle body speed and/or a road surface friction coefficient from sensor output signals. The estimating unit determines a coordinate pair of a wheel speed value and a longitudinal force coefficient value for each wheel, and plots the coordinate pairs of the individual wheels as a set of points in a plane rectangular coordinate axis. The unit determines a regression line closely fit to the point set and obtains the estimates of the vehicle body speed and friction coefficient from the intercept of the regression line on the coordinate axis of the wheel speed and the slope of the regression line.
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patent: 5676434 (1997-10-01), Ichikawa et al.
patent: 5711024 (1998-01-01), Wanke
patent: 5723768 (1998-03-01), Ammon
patent: 5774821 (1998-06-01), Eckert
Le Mark T.
Nissan Motor Co,. Ltd.
Williams Thomas J.
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