Abstract: A reduction ratio controlling mechanism provided within the hydraulic control system of a continuously variable automatic transmission of a vehicle including a V-belt type continuously variable transmission which comprises an input pulley and an output pulley, the effective diameter of each of said pulleys being variable by means of a corresponding hydraulic servomechanism, and a V-belt extending between said input and said output pulleys, for changing the reduction ratio of said continuously variable transmission by supplying a hydraulic fluid to and by draining same from the hydraulic servomechanism of said input pulley.

Abstract: An electronically controlled automatic transmission control system for controlling an automatic transmission for a vehicle, comprising an electronic controller which receives functions on the basis of input signals corresponding to the running conditions of the vehicle to control a hydraulic controller including a fluid pressure source, shift control valves for changing over the connection of the fluid pressure source to the respective hydraulic servomotors of frictional engaging mechanisms which controls the operation of the components of a gear train included in the automatic transmission, solenoid valves adapted to be controlled by the electronic controller to change input signal pressures to the shift control valves and a manual selector valve having a spool capable of moving through predetermined set positions corresponding to the shift positions of the manual shift lever of the vehicle, in which the input signal pressure is supplied to one of the shift control valves, namely, 1-2 shift control valve, wh

Abstract: An automatic transmission locking mechanism for parking, including a cam rod provided in the front portion thereof with a cam of a predetermined shape and interlocked at the rear end thereof with a manual shift lever, a sleeve supporting and guiding the cam rod for smooth axial movement and a pawl provided with a detent which made to engage with the parking gear of an automatic transmission by the axial movement of the cam rod when the manual shift lever is shifted to place the automatic transmission in the parking range.

Abstract: An automatic transmission locking mechanism for parking, comprising a detent lever interlocked with and adapted to be turned by a manual shift lever, a rod adapted to be advanced or retracted by the detent lever, a cam slidably mounted on the rod and adapted to push a pawl having a detent to the operating position where the detent engages with a parking gear when the automatic transmission is placed in the parking range, a bracket on which the cam runs and a spring for disengaging the detent from the parking gear and for retaining the pawl at the released position. The spring is disposed in the vicinity of the free end of the pawl and within a plane in which the pole turns, with one end thereof engaged with the free end portion of the pawl and with the other end thereof fixed in a finished hole formed in a stationary part.

Abstract: An automatic transmission locking mechanism including a lever rotatively interlocked with a manual shift lever, a rod adapted to be advanced or retracted by the lever, a parking gear, a pawl with a detent having a detent to be engaged with the parking gear, a cam mounted on the rod for pushing up the pawl in shifting the manual shift lever to the parking position, a bracket on which the cam runs and a spring for releasing the pawl from the parking gear and for retaining the pawl at the released position, wherein the pawl is rotatably supported on a shaft of a reduced length and the spring is disposed near the free end of the pawl within a plane in which the pawl is turned on the shaft and thereby the locking mechanism is formed in a compact construction and is suitably applicable to a front-engine front-drive vehicle.

Abstract: An automatic transmission locking mechanism including a detent lever rotatively interlocked with a manual shift lever and provided with notches corresponding to the shift positions, respectively, of the manual shift lever for receiving the detent of a detent spring, a rod adapted to be advanced or retracted by the detent lever, a parking gear fixed to the output shaft of the automatic transmission, a pawl having a detent to be engaged with the parking gear in locking the parking gear, a cam slidably mounted on the rod and adapted to push the pawl for turning when the rod is advanced in shifting the manual shift lever to the parking position, a bracket on which the cam runs upward and a spring for releasing the pawl from the parking gear and for retaining the pawl at the released position. A contact surface formed in the free end of the pawl for engagement with the cam is formed so as to reduce the detrimental slip between the cam and the contact surface to the least possible degree.

Abstract: The transmission comprises a hydraulic power transmission device, a V-belt stepless shifter and a planetary gear train. At restart time when the vehicle is at rest with the V-belt stepless shifter in high gear, the hydraulic power transmission device is operated to shift for providing a relatively high torque ratio, rather than the V-belt stepless shifter. A smooth restart is thus made possible. In addition, the planetary gear train permits the shifter smoothly to switch between forward and reverse. Both features meet the transmission needs of all vehicles.

Abstract: The transmission comprises a hydraulic power transmission device, a V-belt stepless shifter and a planetary gear train. At restart time when the vehicle is at rest with the V-belt stepless shifter in high gear, the hydraulic power transmission device is operated to shift for providing a relatively high torque ratio, rather than the V-belt stepless shifter. A smooth restart is thus made possible. In addition, the planetary gear train permits the shifter smoothly to switch between forward and reverse. Both features meet the transmission needs of all vehicles.

Abstract: A throttle opening detector for internal combustion engine is composed of a slide contact device which has first and second contacts with potential periodically varying in pulse form corresponding to throttle opening variation, phase difference of pulses beteeen said first and second contacts being a fourth of the period, and of a throttle opening reading device which reads out throttle opening from the potential variation in the first and second contacts and variations of exclusive-OR of potential signals in both contacts. The throttle opening detector enables to detect throttle opening precisely using a cheap micro-computer in 2 bits and to carry out the initial adjustment automatically.

Abstract: A one-way brake having end bearings the support wall of each of which is protruded at the inner race side portion thereof in the outward direction with respect to a space between inner and outer races from that surface of the support wall which is contacted by a support means connected to the outer race, to thereby increase the area of that portion of the inner race which is in sliding contact with an inner rib of the support wall. Accordingly, the wear resistance and stiffness of the end bearings can be increased without increasing an attaching space.

Abstract: A shift control device for an automatic transmission comprises a pressure hold valve equipped with a pressure oil and an oil chamber wherein said pressure oil is connected to an oil passage being between a shift valve and an oil servo and equipped line pressure is supplied to said oil chamber, and a flow control valve which restricts exhausting of the pressure oil of said pressure hold valve; wherein oil is exhausted through a fore-stage shift valve after the oil pressure of the oil pressure servo to be released is held in the appointed times at the shift where fore-stage engaging elements are disengaged and other engaging elements are allowed to operate without passing through the one-way clutch of an automatic transmission.

Abstract: The control device for automatic transmissions with an overdrive mechanism engages the brake of the overdrive mechanism while the shift control valve of the hydraulic control device is in the N-position (neutral), so that when the shift lever is shifted from the N-position to the D-position or R-position, the overdrive mechanism is momentarily set for overdrive thereby reducing shocks upon manually shifting.

Abstract: A shift control device for an automatic transmission relating to this invention comprises: an electric control circuit comprising a means for generating an electric signal in accordance with the running conditions of the vehicle and a logic circuit for receiving the signals from said means and generating an electric output signal corresponding to one of the gears; a first solenoid to supply and discharge fluid pressure in fluid passages, said first solenoid acting in response to said electric output signal; a first shift valve operable between upshift and down-shift positions, the position of said first shift valve controlled by said first solenoid; a second solenoid to supply and discharge fluid pressure in fluid passages, said second solenoid acting in response to said electric output signal; and second and third shift valves operable between upshift and downshift positions, the positions of said second and third shift valves controlled by said second solenoid and by the position of said first shift valve;

Abstract: An automatic four-wheel drive transfer case according to this invention comprises a differential gear connected to the output shaft of a transmission, said differential gear having first and second side gears and a casing, a clutch arranged coaxially with the output shaft for releasably engaging the casing of the differential gear with the side gears thereof, the first side gear being connected with a rearwheel drive output shaft which is arranged on the extension of the output shaft of the transmission, the second side gear being connected with an intermediate shaft arranged coaxially with the output shaft of the transmission, a selective gearing for selectively engaging the second side gear with a front-wheel drive output shaft to change over between two-wheel drive and four-wheel drive, and a clutch control which receives a signal indicating the position of the selective gearing and signals representing the revolution speed of the front-wheel drive output shaft and/or the rear-wheel drive output shaft so a

Abstract: A lock-up clutch having high durability and high reliability of operation is provided in the present invention.