HYDRAULIC CONTROL DEVICE OF AUTOMATIC TRANSMISSION

• Main Authors: KITAO TAKUYA, YAMAGUCHI MASAJI, TSUCHIDA KENICHI, HIRAI NOBUYUKI, MAEDA YOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a hydraulic control device of an automatic transmission in which a delay part for delaying pressure accumulation to an accumulator can be arranged without causing the enlargement of a solenoid valve and an increase of a cost.SOLUTION: A hydraulic control device of an automatic transmission comprises: a valve body 30 having a linear solenoid valve SL1 which can output engagement pressure PSL1 based on line pressure PL to a gear change mechanism 2; an accumulator 60 which can accumulate hydraulic pressure in a pressure chamber 61; a solenoid valve 70 which can open and close the pressure chamber 61; and a connecting pipe 50 for connecting the valve body 30 and the solenoid valve 70 to each other. The valve body 30 comprises a delay part 34 which delays the circulation of oil to the accumulator 60 from the linear solenoid valve SL1 more than the circulation of the oil to the linear solenoid valve SL1 from the accumulator 60, and has a check valve 35 and an orifice 36 which are interposed at oil passages b1, b2 between the linear solenoid valve SL1 and the accumulator 60.SELECTED DRAWING: Figure 3 【課題】ソレノイドバルブの大型化やコスト増を招くことなく、アキュムレータへの蓄圧を遅らせる遅延部を設けることができる自動変速機の油圧制御装置を提供する。【解決手段】ライン圧ＰＬに基づいた係合圧ＰＳＬ１を変速機構２に出力可能なリニアソレノイドバルブＳＬ１を有するバルブボディ３０と、油圧を圧力室６１に蓄圧可能なアキュムレータ６０と、圧力室６１を開閉可能なソレノイドバルブ７０と、バルブボディ３０とソレノイドバルブ７０とを連結する連結管５０と、を備え、バルブボディ３０は、リニアソレノイドバルブＳＬ１からアキュムレータ６０への油の流通をアキュムレータ６０からリニアソレノイドバルブＳＬ１への油の流通よりも遅くすると共に、リニアソレノイドバルブＳＬ１及びアキュムレータ６０の間の油路ｂ１，ｂ２に介在された逆止弁３５及びオリフィス３６を有する遅延部３４を備える。【選択図】図３