HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

• Main Author: KUMAZAWA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• 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 for an automatic transmission capable of shortening a warming-up time while restricting deterioration of fuel consumption.SOLUTION: When a non-travel range is selected by a change lever (31) (S1 is No) or when a travel range is selected by the change lever (S1 is Yes), the range is a normal travel other than a starting time and a gear changing time (S2 is Yes) and a hydraulic pressure of hydraulic fluid is less than a prescribed pressure (S4 is Yes) and a temperature of hydraulic fluid is more than a prescribed temperature (S5 is Yes), a hydraulic pressure of hydraulic fluid is set to a low pressure side by a hydraulic pressure adjusting mechanism 14 (S6); and when a temperature of the hydraulic fluid is less than a prescribed temperature (S5 is No), the hydraulic pressure of the hydraulic fluid is set to a high pressure side (S7) by the hydraulic pressure adjusting mechanism 14.SELECTED DRAWING: Figure 2 【課題】燃費の悪化を抑制しつつ、暖機時間を短縮することのできる自動変速機の油圧制御装置を提供すること。【解決手段】チェンジレバー（３１）により非走行レンジが選択されている場合（Ｓ１がＮｏ）、又は前記チェンジレバーにより走行レンジが選択されており（Ｓ１がＹｅｓ）、発進時及び変速時以外の通常走行時であり（Ｓ２がＹｅｓ）、且つ前記作動油の油圧が所定圧以下である場合に（Ｓ４がＹｅｓ）、作動油の温度が所定温度以上である場合は（Ｓ５がＹｅｓ）、油圧調整機構１４により作動油の油圧を低圧側に設定し（Ｓ６）、作動油の温度が所定温度未満である場合は（Ｓ５がＮｏ）、油圧調整機構１４により作動油の油圧を高圧側に設定する（Ｓ７）。【選択図】図２