Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Mitsubishi Steel Mfg. Co., Ltd.

Mitsubishi Jidosha Engineering Kabushiki Kaisha

Seiichi Inukai

Kenjiro Fujita

Akihiro Kondo

Katsutoshi Usuki

Yasuhiko Fujita

Minoru Sawayama

Masayoshi Shimoseki

Akira Mino

Minoru Shibuya

When a MODE selector SW is manipulated while CVT automatic shifting mode is selected, the shifting mode is switched to STEP-AT automatic shifting mode. Then, when the shift lever of a shifting device is manipulated by the driver while the CVT automatic shifting mode is selected as the shifting mode of a CVT, the then-set automatic shifting control mode for the CVT is maintained whereas the shifting mode of the CVT is switched to sport mode. When the sport mode being selected as the shifting mode of the CVT is canceled, the shifting mode of the CVT is switched to the mode selected before the switchover to the sport mode, that is, the maintained automatic shifting control mode, unless the MODE selector SW is manipulated during execution of the sport mode.

Control device for transmission

A coiled wave spring obtained by winding a corrugated wire into a coil shape, wherein mutually overlapping top portions and mutually overlapping base portions of the spring are in mutual contact and predetermined gaps are defined between mutually overlapping slope portions which connect the top and base portions, the first loop of the spring, that is, on the upper side, and the second loop, that is, on the lower side, are in mutual contact in an axial direction thereof only between the top portions and between the base portions, and the gaps are defined between the slope portions to prevent mutual contact. When the spring receives a load and undergoes deformation, the top portions and the base portions come into mutual contact, respectively, but hardly generate friction. Since the gaps are defined between the mutually overlapping slope portions, friction does not occur at these portions, either.

Coiled wave spring and production method thereof

A hydraulic control device for an automatic transmission including a first frictional engaging element for achieving a low-speed side position, a second frictional engaging element for achieving a position higher in speed than the low-speed side position, a third frictional engaging element for achieving a position even higher in speed than the high-speed side position, a regulator valve for regulating pressure from an oil pump to a predetermined pressure and reducing the predetermined pressure in response to supply of a pilot pressure, and a control valve for controlling the pressure from the regulator valve to a desired hydraulic pressure, for controlling hydraulic pressures to the plural frictional engaging elements. A change-over valve is provided for making the control valve in communication with one of the first frictional engaging element and the third frictional engaging element and supplying and discharging the pilot pressure to the regulator valve, so that the change-over valve is operated by hydraulic pressure supplied to the second frictional engaging element and takes a first position where the control valve communicates with the first frictional engaging element and blocks supply of the pilot pressure to the regulator valve when the supply pressure is lower than a predetermined value, and takes a second position where the control valve communicates with the third frictional engaging element and supplies the pilot pressure to the regulator valve when the supply pressure to the second frictional engaging element is higher than a predetermined value.

Hydraulic control appartus for automatic transmission

A bypass line is provided to return an excess portion of working oil, whose pressure has been regulated by a regulator valve, to a suction side of an oil pump from a point between the regulator valve and a torque converter pressure regulator valve. An oil filter is inserted in the bypass line.

Hydraulic circuit

Growing community of inventors

Kyoto, Japan

Seiichi Inukai