Fluid-pressure and analogous brake systems – Speed-controlled – Odd condition or device detection
Patent
1996-05-23
1996-03-12
Ballato, Josie
Fluid-pressure and analogous brake systems
Speed-controlled
Odd condition or device detection
303DIG7, B60T 858
Patent
active
054980720
ABSTRACT:
An automobile anti-skid brake control system, comprises wheel-speed sensors, a pseudo vehicle speed generator, an arithmetic circuit for calculating a slip ratio of each road wheel, and a controller for controlling a wheel-brake cylinder pressure of each road wheel. The controller includes a compensation circuit for compensating a different-diameter wheel speed of a different-diameter road wheel with a small-sized emergency tire, utilizing an error rate of the different-diameter wheel speed with respect to the detected wheel speed of the other road wheel with a usual tire. The error rate is derived on the basis of a ratio of diameter-difference between the different-diameter road wheel and the other road wheel. The ratio of diameter-difference is derived on the basis of a maximum wheel speed corresponding to the different-diameter wheel speed and a second highest wheel speed of the detected wheel speeds. The controller controls each wheel-brake cylinder pressure so that the slip ratio derived from a compensated pseudo vehicle speed based on the compensated different-diameter wheel speed is adjusted to a predetermined reference slip ratio.
REFERENCES:
patent: 4545623 (1985-10-01), Sato et al.
patent: 5015042 (1991-05-01), Yoshino
patent: 5200897 (1993-04-01), Makino et al.
Ballato Josie
Nissan Motor. Co., Ltd.
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