Jatco Corporation

Kiyokazu Tanaka

Hiroyuki Nishiyama

Fumikazu Takaoka

Takuya Takamura

Toshinari Ohde

A shift control device is mounted on a vehicle and provided with a shift control unit to control a speed ratio of a continuously variable transmission which continuously shifts and allows output of a rotational speed of a driving power source, wherein the shift control unit executes, based on a driving state of the vehicle, a first shift control for suppressing a change of the speed ratio and a second shift control for upshifting the speed ratio to a predetermined speed ratio, and suppresses a change of the speed ratio in the first shift control, followed by shifting the speed ratio to become lower before execution of the second shift control.

Control device and control method for continuously variable transmission

An engaging apparatus is provided that includes: outer and inner support members having respective splines that are opposed to each other in a radial direction thereof, and being rotatable relative to each other; a plurality of outer friction plates engaging with the spline of the outer support member; a plurality of inner friction plates alternately superposed on the outer friction plates and engaging with the spline of the inner support member; and a hydraulic piston mechanism for compressing a stack of the outer and inner friction plates. A spring member is inserted between circumferentially opposed faces of a driven set of the friction plates and a spline of the corresponding support member. The spring member is formed by bending an elastic material at an axially intermediate point thereof to have a long side and a short side with a circumferential spacing left therebetween. The long side supports the driven plates, and the end portion of the short side is supported by a side wall of the spline at a point that is approximately aligned with an axially middle portion of a region of said long side, which region supports the driven plates.

Engaging apparatus

According to the clutching device of the present invention, a flexible member, which uniformly forces a plurality of friction plates almost in the circumferential direction, is inserted between edge faces, of fixed friction plates, to which no load is applied at the time of engagement, and a spline face that is opposite to the edge faces. The insertion position is selected at such a location where the rotational direction of a rotary body is diagonally upward and toward the center. Since a load on and a degree of distortion of the flexible member are small, the flexible member can be compactly made and can have a simple design, and the mounting structure on the spline side is also simpler. The clutching device with this structure effectively prevents the vibration of friction plates, requires only a small number of components. And additional components are easily installed and removed.

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Fuji, Japan

Kiyokazu Tanaka