Combined dynamic and mechanical braking system for automotive ve

Details Combined dynamic and mechanical braking system for automotive ve Combined dynamic and mechanical braking system for automotive ve

1977-03-17

1978-06-20

Reger, Duane A.

Brakes

Operators

Electric and mechanical

303 3, F16D 6536

Patent

active

040956806

ABSTRACT:
A braking system for automotive vehicles wherein a hydrodynamic brake normally furnishes the required braking torque in all effective positions of the brake pedal but its braking action can be supplemented or replaced by the braking force which is furnished by one or more fluid-operated mechanical friction brakes. The hydrodynamic brake is actuated only when the brake pedal is depressed sufficiently to insure that the pressure of fluid in the brake lines for the mechanical brakes at least equals that (application) pressure at which the pressurized fluid can overcome the friction-induced resistance of moving parts which serve to apply the mechanical brakes. When the speed of the vehicle is reduced to a lower limit at which the braking torque furnished by the hydrodynamic brake begins to decrease in a paraboloidal manner, the mechanical brakes can furnish, alone, a braking force which equals or closely approximates the braking torque of the hydrodynamic brake at the aforementioned lower limit of the speed and in the same position of the brake pedal. Furthermore, the braking force which is furnished by the mechanical brakes alone, in any position of the brake pedal and while the speed exceeds the aforementioned lower limit, equals or closely approximates the braking torque which is furnished by the hydrodynamic brake.

REFERENCES:
patent: 2860737 (1958-11-01), Hines
patent: 2933350 (1960-04-01), Hines
patent: 3488570 (1970-01-01), Vint et al.

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