Retarder brake control

Details Retarder brake control Retarder brake control

1982-11-15

1984-11-06

Stoner, Jr., Bruce H.

Brakes

Internal-resistance motion retarder

Combined with surface-friction brake

188296, 192 4B, 303 3, 303 13, F16F 1100

Patent

active

044807287

ABSTRACT:
A control system for a combination hydrodynamic and friction retarder brake wherein in an output speed range above a first reference speed retarder braking is entirely hydrodynamic, in an output speed range between the first reference speed and a lower second reference speed retarder braking is partially hydrodynamic and partially friction with friction braking increasing as output speed decreases to a maximum at the second reference speed, and in an output speed range below the second reference speed both friction and hydrodynamic retarder braking decrease as output speed decreases to provide a smooth transition to the vehicle's service brakes. In addition, a partial apply valve is provided to limit retarder braking in all speed ranges to levels proportional to a manually applied retarder brake demand signal.

REFERENCES:
patent: 4235320 (1980-11-01), Polak et al.
patent: 4324320 (1982-04-01), Spurlin et al.

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