Hydraulic controller for automatic speed change gear equipped with overdrive mechanism

Abstract

Abstract PURPOSE:To obtain a small-sized hydraulic circuit which is used in common with a hydraulic pressure feeding passage to the clutch and the brake of a planetary gear mechanism for overdrive, on the downstream side of an overdrive shift valve. CONSTITUTION:A 3-4 shift valve 20 is installed to control the direct clutch 54 and the overdrive brake 56 of a planetary speed change gear for overdrive. The output port 204 of the 3-4 shift valve is connected to an overdrive releasing valve 207. The output port 213 of the valve 207 is connected to a common line 222, which is connected to a clutch 54 and a brake 56. Also the common line 222 is connected to a lock-up control valve 225 by the lock-up clutch 15 of a torque converter 10.

Inventors

• 👤 Kunio Otsuka
• 👤 邦雄 大塚
• 👤 Masaru Fukuiri
• 👤 福入　勝
• 👤 Toshiyasu Yoshida
• 👤 吉田　敏保

Bibliographic Details