F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
138/22
F16H 41/22 (2006.01) B60T 1/06 (2006.01) B60T 1/08 (2006.01) B60T 13/58 (2006.01) F16D 57/04 (2006.01) F16D 63/00 (2006.01) F16D 65/853 (2006.01)
Patent
CA 1128833
C-2959 D-1,930 RETARDER AND FRICTION BRAKES Abstract of the Disclosure A retarder and friction brake system having vehicle service brakes and a shaft brake unit having a hydrodynamic retarder and friction brake. Manual brake controls provide for initial brake apply of the brake unit and then apply of the service brakes or independent apply of the service brakes. The brake unit has a dual chamber, hydrodynamic retarder with opposed bladed stators and a central rotor member having opposed bladed rotors mounted between the stator members for limited axial movement and rotation with a drum fixed to the shaft, and a friction brake having plates located concentric- ally within the retarder chambers on opposite sides of the rotor and splined to the drum and stators and a brake apply motor and fluid pressure proportional to brake demand and, in a low speed range limited to lower values with decreasing speed, to a brake chamber to provide a release pressure on the brake apply motor and flow through the constant restriction cooling passages in the brake plates to the retarder chambers for retarder braking and pumping through a cooler to provide with increasing speed in the low speed range, decreasing fric- tion braking and increasing retarder braking having a total value proportional to brake demand, and in the higher speed range low friction braking and high demand and increasing in a total value proportional to brake demand and increasing in a substantially straight line with increasing speed.
323949
Fackenthal Harry
Lentz Carl A.
Palmer Walter E.
Polak James C.
Schaefer Robert H.
General Motors Corporation
Gowling Lafleur Henderson Llp
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