Document Type and Number:
Japanese Patent JPS4968419
Kind Code:
A
Abstract:
Two concurrently operated hydraulic brakes of an automotive transmission, actuated in an intermediate-speed ("second gear") position, are filled under the control of a slide valve whose slider in a normal position admits fluid at high rate to both brakes and thereafter assumes an unstable throttling position in which the fluid pressure gradually builds up in them to a value causing an associated plunger to return the slider to normal. One of the brakes, which is only unidirectionally effective, remains actuated also upon an upshift into a high-speed position ("third gear") whereas the other, bidirectionally effective brake is released upon such upshift under the control of a shift valve which cuts off the fluid flow to the latter brake and establishes a drainage path therefor by passing the slide valve.
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Application Number:
JP10043173A
Publication Date:
July 03, 1974
Filing Date:
September 07, 1973
Export Citation:
International Classes:
B60W10/02; B60K23/02; B60W10/18; F16H61/02; F16H61/06; F16H61/08; F16H63/02; F16H63/30; F16H63/44; F16H63/48; (IPC1-7): F16H5/14
Domestic Patent References:
| JP46019134A |