Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Nobuyuki Nagashima

Mitsuhiro Umeyama

Yuji Iwase

Akira Murakami

Hisanori Nomoto

Yutaka Taga

Mitsuhiro Nada

Kunio Morisawa

Hiroyuki Shioiri

Hiroshi Itoh

Hiroatsu Endo

Satoru Wakuta

Kazuhisa Ozaki

Masahiro Kojima

Masatoshi Adachi

Tatsuya Ozeki

Tomoyuki Maruyama

Masatoshi Yamada

Koji Oshima

Tomoe Osada

Kenji Imai

Masato Fujikawa

Kazuhito Enomoto

Akira Kasamatsu

Masanori Ohtake

Yasuhiro Kondo

Kiyotomo Mirua

Drain holes are arranged in positions offset from valve holes of a valve body. The drain holes have a long chimney-shaped space such that even if insulation material, that has peeled off of an electric motor, is suspended in oil, it is less likely to enter drain chambers through the drain holes.

Hydraulic circuit device and hybrid drive system using that hydraulic circuit device

A first hydraulic pump and a second hydraulic pump are respectively mounted to both ends of a rotary shaft in an electric motor, whereby it is possible to drive both of the first hydraulic pump and the second hydraulic pump by one electric motor. Since the electric motor is driven and controlled so as to have any higher rotational speed among a rotational speed of the first hydraulic pump for obtaining an amount of working fluid required in a hydraulic control circuit for a power steering apparatus and a rotational speed of the second hydraulic pump for obtaining an amount of working fluid required in a hydraulic control circuit for a power train by a hydraulic pump drive controlling portion, it is possible to necessarily and sufficiently secure the working fluids respectively required in the power steering hydraulic control circuit and the power train hydraulic control circuit which are independent from each other, by a little electric power consumption.

Hydraulic control apparatus of vehicle and control method

A hydraulic control system for an automatic transmission, which has a frictional engagement unit adapted to be kept in a slipping state when in a predetermined speed changing state and in an applied state when in another gear ratio changing state; and a drain oil establishing member for establishing a drain oil when the frictional engagement unit is kept in the slipping state comprises a drain pressure switching mechanism for supplying the drain oil to the frictional face of the frictional engagement unit when the frictional engagement unit is kept in the slipping state.

Hydraulic control system for automatic transmissions

A hybrid drive system comprising: a torque amplify mechanism coupled to an output member of an internal combustion engine and an output member of an electric motor, as energized by an electric power to output a torque, for amplifying and outputting the torque, as outputted from the internal combustion engine, by controlling the torque of the electric motor; and a continuously variable transmission arranged between torque amplify mechanism and the output shaft for increasing/decreasing and outputting the torque inputted from the torque amplify mechanism. Further comprised is a forward/backward switching mechanism between the torque amplify mechanism and the output shaft for setting a forward state, in which the inputted motive power is unreversed and outputted, and a backward state in which the inputted motive power is reversed and outputted. As a result, the reverse run can be made only with the motive power outputted from the internal combustion engine.

Hybrid drive system

To suppress a separation of working fluid from the vane surface during operation at and around a fluid coupling condition attained after a substantial completion of torque conversion, the aerofoil and the array of stator vanes of a torque converter for vehicles are arranged such that a pressure side leading edge area and a suction side trailing edge area of the vane respectively satisfy the following conditions based upon the parameters assumed in FIG. 2:

Stator of torque converter for vehicles improved to suppress separation

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Toyota, Japan

Nobuyuki Nagashima