Measuring and testing – Frictional resistance – coefficient or characteristics
Patent
1991-01-30
1992-05-05
Raevis, Robert
Measuring and testing
Frictional resistance, coefficient or characteristics
G01M 1500
Patent
active
051096943
ABSTRACT:
The present invention relates to a method for estimating vehicle speeds independently on front and rear wheels of a four-wheel motor vehicle on the basis of front wheel speeds and rear wheel speeds, for use as a basis for determining slip rates for front and rear wheels. According to the first method of the invention, a reference wheel speed determined by the vehicle speed as estimated from the left and right wheel speeds cannot be unnecessarily increased during turning of the vehicle. According to the second and third methods of the invention, the estimated vehicle speed largely does not deviate from the actual vehicle speed in the event of a phase difference of variants produced between the left and right wheels due to an anti-lock control during the turning of the vehicle. According to other features of the invention, corrections can be performed with respect to the inner and outer wheel differences during turning of the vehicle based on an index representative of the traveling speed, lateral acceleration of the vehicle and steering angle.
REFERENCES:
patent: 3930688 (1976-01-01), Rau et al.
patent: 4042059 (1977-08-01), Bertolasi
patent: 4322809 (1982-03-01), De Vlieg et al.
patent: 4526426 (1985-07-01), Sato et al.
patent: 4877295 (1989-10-01), Yoshino
Iwagawa Yoshihiro
Satoh Tsuyoshi
Sugimoto Yoichi
Yahagi Toshio
Honda Giken Kogyo Kabushiki Kaisha, Corp.
Raevis Robert
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