Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-09-11
1987-03-10
Brigance, Gerald L.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 96, 303119, 303116, 303DIG4, 180197, B60T 840, B60L 310
Patent
active
046486631
ABSTRACT:
A wheel slip controlling system according to the present invention comprises braking actuator operable by a driver of a car for braking rotation of wheels at least including driving wheels, slip detector for detecting a slipping condition of the wheels to output a slip signal indicative of the slipping condition, anti skid controller for receiving the slip signal and for controlling, in response to the slip signal received, the pressure to be imparted from the braking actuator with a self-contained pressure source to control braking slips of said wheels at least including the driving wheels and traction controller responsive to the slip signal during acceleration of the car for controlling the driving wheels with the self-contained pressure source for control acceleration slips at least of the driving wheels. Since the system makes use of the pressure of a hydraulic source of a conventional anti skid brake system and controls a braking system, quick responsiveness can be obtained without the necessity of extensive modification of the conventional anti skid brake system. When a driver carries out a braking operation to exhibit his own braking will, the braking operation will have a priority so that the slip control can be attained without deterioration of the treadling feeling of a brake pedal. If any other controlling technique such as priority of stabilized brake hydraulic pressure with a hysteresis is used in combination for selection of traction control, more stabilized acceleration slip control can be attained.
REFERENCES:
patent: 3582152 (1971-06-01), Burckhardt
patent: 3825306 (1974-07-01), Fink
patent: 3893535 (1975-07-01), Burckhardt et al.
patent: 3909071 (1975-09-01), Klatt
patent: 4033637 (1977-07-01), Leiber
patent: 4462642 (1984-07-01), Leiber
Ishikawa Masakazu
Nakamura Kazumasa
Nogami Takahiro
Nomura Yoshihisa
Ohashi Kaoru
Brigance Gerald L.
Oberley Alvin
Toyota Jidosha & Kabushiki Kaisha
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