Foley & Lardner LLP
Hydraulic control device and method for controlling the same
A hydraulic control device controls hydraulic pressure supplied to a continuously variable transmission. The hydraulic control device includes a pressure regulating valve, a solenoid valve configured to control the pilot pressure, line pressure control means, and hydraulic control means. The pressure regulating valve includes an input port to which line pressure is input, an output port configured to supply an oil chamber of a second pulley with a second pulley pressure, a drain port configured to discharge the second pulley pressure from the oil chamber, and a spool moving according to pilot pressure to regulate the second pulley pressure. The line pressure control means is configured to control the line pressure on the basis of the second pulley pressure and first pulley pressure of first pulley. The hydraulic control means is configured to temporarily change the pilot pressure from set pressure to configure the line pressure identical to the second pulley pressure.
JATCO Ltd
F F
F16H F16H
additional inventional
Tomoaki Seiichiro Yasuyuki Nobuhiko Nobuhide Hitoshi Koichi Tomoaki
Kabe Takahashi Hashimoto Morifuji Kato Goka Sugita Honma