Oblon, Spivak, McClelland, Maier & Neustadt
Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating means for increasing belt tensioning pressure upon reversal of rotating direction of pulleys
 A hydraulic control apparatus for controlling a continuously variable transmission of a motor vehicle, which transmission includes a first and a second shaft, a pair of variable-diameter pulleys provided on the first and second shafts, respectively, a transmission belt connecting the pulleys, and a pair of hydraulic actuators one of which receives a belt tensioning pressure for controlling a tension of the belt. The hydraulic control apparatus includes a reversal detecting device for determining whether a rotating direction of the pulleys has been reversed or not, and a pressure increasing device for temporarily increasing the belt tensioning pressure when the reversal detecting device detects reversal of the rotating direction of the pulleys. 
Toyota Jidosha Kabushiki Kaisha
F F
F16H F16H
additional inventional
Nobuyuki Masami Yoshinobu Yuji
Kato Sugaya Soga Hattori