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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4988231
Kind Code:
A
Abstract:
A hydrodynamic retarder for vehicles, especially for motor vehicles which includes an internal working circulation between at least one rotating and at least one fixed blade wheel. An external cooling circulatory system with a by-pass valve actuatable by the pressure in the system is provided with a filling cylinder being connected with the external cooling circulatory system by way of a filling and discharge line and controlled by way of a control valve, for example, from the brake pedal. A reservoir tank is coordinated to the external cooling circulatory system and a pressure relief of the spaces disposed directly in front of the shaft seals in the direction toward a place of the working circulation which is pressureless during operation. A first spring-loaded valve especially a disk valve is coordinated to the filling cylinder which, during a braking operation closes the connection between the filling and discharge line and the reservoir tank but opens the connection of the filling and discharge line to the filling cylinder and which during idling operation opens up the connection between filling cylinder, reservoir tank and filling and discharge line. The system additionally includes a lubricating line between the pressure-relieved spaces and the filling and discharge line which includes a second spring-loaded valve, especially a disk valve that closes during braking operation but opens up the connection between lubricating line and filling and discharge line during the idling operation.

Application Number:
JP13623373A
Publication Date:
August 23, 1974
Filing Date:
December 07, 1973
Export Citation:
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International Classes:
B60T1/08; B60T10/00; F16D57/02; F16D57/04; F16D65/78; (IPC1-7): B60T1/08