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Patent Searching and Data


Title:
BRAKE SYSTEM EMPLOYING DYNAMICALLY HYDRAULIC BRAKE
Document Type and Number:
Japanese Patent JPS54162067
Kind Code:
A
Abstract:
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 concentrically within the retarder chambers on opposite sides of the rotor and splined to the drum and stators and a brake apply motor. In response to brake demand, the brake controls provide air pressure proportional to brake demand to the 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 friction braking and increasing retarder braking having a total value proportional to brake demand, and in the higher speed range low friction braking and high retarder braking having a total value proportional to brake demand and increasing in a substantially straight line with increasing speed.

Inventors:
JIEEMUSU SHII PORAKU
HARII FUATSUKENSARU
KAARU EE RENTSU
UORUTAA II PARUMAA
ROBAATO ETSUCHI SHIEEFUAA
Application Number:
JP7135479A
Publication Date:
December 22, 1979
Filing Date:
June 08, 1979
Export Citation:
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Assignee:
GEN MOTORS CORP
International Classes:
B60T1/06; B60T1/08; B60T1/087; B60T10/00; B60T13/10; B60T13/58; F16D57/04; F16D63/00; F16D65/853; (IPC1-7): B60T13/14