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    • 1. 发明专利
    • Hydraulic control device for a belt-type continuously variable transmission
    • JP5310468B2
    • 2013-10-09
    • JP2009237660
    • 2009-10-14
    • トヨタ自動車株式会社
    • 敏行 小林
    • F16H61/00F16H61/662
    • PROBLEM TO BE SOLVED: To avoid the complication of the structure of a hydraulic control device of a belt-type continuous variable transmission in preventing the energy loss of a hydraulic control device which supplies oil to an oil pressure chamber. SOLUTION: The hydraulic control device of the belt-type continuously variable transmission includes a belt 4 wound around a primary pulley 2 and a secondary pulley 3, wherein are provided a first oil pressure chamber 9 for compression for pushing the first movable piece 7 of the primary pulley 2 to the belt 4, a second oil pressure chamber 20 for compression for pushing the second movable piece 15 of the secondary pulley 3 to the belt 4, a third movable piece 22 which contacts with the first movable piece or the second movable piece and is able to move in a direction along the rotation axis line, an oil pressure chamber 25 for speed change for providing a thrust force to the third movable piece 22 to control a gear ratio, and a connection oil path 32 which connects the first oil pressure chamber 9 for compression with the second oil pressure chamber 20 for compression to allow the oil to go back and forth at the time of changing the gear ratio between the first oil pressure chamber 9 for compression and the second oil pressure chamber 20 for compression. COPYRIGHT: (C)2011,JPO&INPIT