A hydraulic pressure supply system of an automatic transmission for a vehicle may include a low-pressure hydraulic pump, a low-pressure regulator valve, a high-pressure hydraulic pump, a high-pressure regulator valve regulating the high hydraulic pressure supplied from the high-pressure hydraulic pump to be stable hydraulic pressure and supplying the regulated hydraulic pressure to the high pressure portion, a first switch valve disposed between the low-pressure hydraulic pump and the low-pressure regulator valve, and selectively communicating the low-pressure hydraulic pump to the low-pressure regulator valve, a second switch valve selectively opening or closing a first circulating line connecting a downstream of the low-pressure hydraulic pump to an upstream of the high-pressure regulator valve, and a third switch valve selectively opening or closing a second circulating line connecting a downstream of the high-pressure regulator valve to an upstream of the low-pressure regulator valve.


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    Title :

    Hydraulic pressure supply system of automatic transmission for vehicle


    Contributors:

    Publication date :

    2017-02-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16H Getriebe , GEARING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS



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