PROBLEM TO BE SOLVED: To accumulate an accumulator quickly by a line pressure after starting a driving source, and to enable actuation of a parking lock without hindrance by the hydraulic pressure accumulated in the accumulator even when the driving source stops in a short time after the start of the driving source.SOLUTION: A hydraulic circuit 31 of an automatic transmission, when a driving source is stopped, releases parking lock by supplying a hydraulic pressure accumulated in accumulators 37, 38 to a hydraulic actuator 25, and, when the driving source is started, accumulates the accumulators 37, 38 by a line pressure. In the case where a predetermined condition is established when the driving source is started, line pressure control means 44 increases the line pressure equal to or greater than the pressure necessary for full filling of the accumulators 37, 38, so that the accumulators 37, 38 come to a state of full filling in a short time by the high line pressure rising right after the start of the driving source, and even when the driving source stops again right after the start, the parking lock can be actuated without hindrance by the hydraulic pressure accumulated in the accumulators 37, 38.SELECTED DRAWING: Figure 8

    【課題】 駆動源の始動後にライン圧で速やかにアキュムレータを蓄圧し、駆動源を始動後に短時間で停止してもアキュムレータに蓄圧した油圧でパーキングロックを支障なく作動可能にする。【解決手段】 自動変速機の油圧回路31は、駆動源を停止したときにアキュムレータ37,38に蓄圧された油圧を油圧アクチュエータ25に供給してパーキングロックを解除するとともに、駆動源を始動したときにライン圧によりアキュムレータ37,38を蓄圧する。駆動源を始動したときに所定条件が成立した場合に、ライン圧制御手段44はライン圧をアキュムレータ37,38の満充填に必要な圧力以上に昇圧するので、駆動源の始動直後に高いライン圧が立ち上がることでアキュムレータ37,38が短時間で満充填の状態になり、駆動源を始動した直後に再び停止しても、アキュムレータ37,38に蓄圧された油圧でパーキングロックを支障なく作動させることができる。【選択図】 図8


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    Title :

    PARKING LOCK DEVICE FOR VEHICLE


    Additional title:

    車両用パーキングロック装置


    Contributors:

    Publication date :

    2016-12-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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