HYDRAULIC CONTROL DEVICE OF AUTOMATIC TRANSMISSION

• Main Authors: MAKINO KOJI, YAMAGUCHI MASAJI, HYODO YOSHIMITSU, TSUCHIDA KENICHI, ICHIKAWA SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 06.07.2015
• 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 capable of shortening an oil path from a drain port of a linear solenoid valve to a drain check valve.SOLUTION: A hydraulic control device of an automatic transmission includes a drain check valve 61 having a first input port 61a communicated with a drain port 66, a sealing member 61p capable of switching communication and cut-off, and a spring 61s biasing to cut off, a fuel safe valve 51 switched to a fuel position in fueling, and having an output port 51d for forward movement, and outputting a prescribed hydraulic pressure for biasing to cut off, and a check valve 62 for delay, having a second input port 62a communicated with the output port 51d for forward movement, an output port 62b communicated with the drain port 66, a sealing member 62p capable of switching communication and cut-off, and a spring 62s communicating the second input port 62a and the output port 62b with each other by a hydraulic pressure lower than the prescribed hydraulic pressure. 【課題】リニアソレノイドバルブのドレーンポートからドレーンチェックバルブまでの油路を短くできる自動変速機の油圧制御装置を提供する。【解決手段】ドレーンポート６６に連通する第１の入力ポート６１ａと、連通及び遮断を切換可能な封止部材６１ｐと、遮断するように付勢するスプリング６１ｓと、を有するドレーンチェックバルブ６１と、フェール時にフェール位置に切り換わると共に、遮断するように付勢する所定の油圧を出力する前進用出力ポート５１ｄを有するフェールセーフバルブ５１と、前進用出力ポート５１ｄに連通する第２の入力ポート６２ａと、ドレーンポート６６に連通する出力ポート６２ｂと、連通及び遮断を切換可能な封止部材６２ｐと、所定の油圧より低い油圧で第２の入力ポート６２ａ及び出力ポート６２ｂを連通させるスプリング６２ｓと、を有する遅延用チェックバルブ６２とを備える。【選択図】図８