Abstract: Described herein is a hydraulic control system for vehicular automatic transmission, including an accumulator back pressure control circuit which is provided between a line pressure conduit and a back pressure supply conduit, and comprises a first accumulator control valve for dropping the line pressure according to the throttle opening, and a second accumulator control valve receiving an input pressure commensurate with the throttle opening and dropping the output pressure of the first accumulator control valve according to the throttle opening to apply to the piston of the accumulator a back pressure varying in corresponding to the engine output shaft torque.

Abstract: In an automatic transmission control system incorporating the conventional line, throttle, and governor fluid pressure regulation valves, mannual selector valve, and shift valves such as 1/2, 2/3, and 3/4 shift valves, there is further incorporated a modulator fluid pressure control valve which produces a modulator fluid pressure of a predetermined constant level from the line pressure available from a port of the manual selector valve when it is shifted to a lower range, such as, for example, 2 range. The line fluid pressure regulation valve, which is normally boosted by the throttle pressure, is instead boosted by the modulator fluid pressure when the modulator fluid pressure is present while the throttle fluid pressure is very low as at the time when the manual selector valve has been shifted from the D range to the 2 range for effecting rapid deceleration of the vehicle, so as to support the governor pressure, generated from the line pressure, at a high level while the vehicle speed is still high.

Abstract: A multi-speed accessory drive employing a planetary gear reduction set. A cone clutch linked to an output member, a ball ramp actuator for moving the cone clutch into engagement with the output member and a brake for selectively controlling the rotation of the ring gear of the planetary gear set.

Abstract: An oil pass for communicating a hydraulic servo a change-over valve is provided with an orifice and a by-pass disposed parallel to one another. The by-pass is provided with a sequence valve. When the hydraulic servo is subjected to less than a predetermined pressure, the sequence valve communicates to the change-over valve and the hydraulic servo through the by-pass, and when the hydraulic servo is subjected to a pressure that is higher than the predetermined pressure, the sequence valve is cut off.

Abstract: A control system for a continuously variable transmission for a motor vehicle has a line pressure control valve having a spool for controlling oil supplied to a cylinder of a driven pulley to change the transmission ratio. The control system operates to increase the line pressure when the vehicle stops. The increased line pressure actuate the cylinder thereby increasing the transmission ratio.

Abstract: A gear box having two coaxial output shafts. The gear box provides for selectively turning the shafts whereby either the outer and inner output shafts rotate together in the same direction at the same angular velocity, the inner output shaft is rotated while the outer output shaft remains stationary, or the outer and inner output shafts are rotated independently of each other. The gear box includes two spaced apart coaxial spur bevel gears and a pair of spur bevel pinions each in meshing engagement with both spur bevel gears. A spur shaft is concentrically located over the inner output shaft and the spur bevel pinions are structurally attached to the spur shaft by radially axles. A first one of the spur bevel gears is concentrically located on the outer output shaft and attached thereto for rotation therewith. The second one of the spur bevel gears is concentrically located on the spur shaft and is journal mounted thereon for independent rotation.

Abstract: An angular position adjusting device including a planetary gear mechanism intervening between a fixed member and a movable member rotatably arranged relative to the fixed member in such a way that the relative gear engagement position between an inner gear and an outer gear of said planetary gear mechanism is changeable when any one of the inner gear and outer gear is eccentrically rotated by an eccentrically rotatable member. The planetary gear mechanism is in engagement with one of the fixed member and the movable member and a torque limiting coupling means intervenes between the planetary gear mechanism and the other of the fixed member and the movable member. A motor for rotating the eccentrically rotatable member may be mounted on any one of the movable and fixed members. With a compact size a high gear reduction ratio and a high shock damping are realized.

Abstract: A hydraulic controller for transmission includes a brake and a clutch each of which corresponds to a different transmission ratio. An orifice control is provided in the conduit structure of the hydraulic circuit for actuating the clutch and brake such that a working oil quantity is varied in response to the engine throttle valve opening.

Abstract: In combination with a power transmission, a power transfer device comprises a transfer casing detachably secured to a transmission casing, a first differential rotatable within the transmission casing and having a first gear casing driven by an output gear of the transmission, a second differential coaxial with the first differential having a second gear casing integral with an output element of the first differential and rotatable within the first gear casing, a carrier member rotatably mounted within the transfer casing and arranged coaxially with the first and second differentials, a first axle connected with an output element of the second differential and extending outwardly from the transmission casing, a second axle connected with another output element of the second differential and extending outwardly from the transfer casing through the carrier member, a hollow shaft in surrounding relationship with the second axle and connected at its opposite ends with another output element of the first different

Abstract: A friction planetary transmission has a sun roller planetary roller and an elastically deformable outer periphery. The planetary rollers are attached to shafts which have a limited amount of radial movement. The outer periphery deforms to exert a frictional contact pressure on the planetary rollers such that a torque can be transmitted. The torque is adjustable by a circular disk which fits inside the outer periphery to regulate the amount of deformation. The circular disk can be moved axially to adjust the torque.

Abstract: A limited slip differential system in the drive train of a motor vehicle with continuous all-wheel drive is provided with a direct through drive acted on by an intermediate planetary transmission and an engageable braking device. The transmission ratio between the planetary transmission and the braking device is substantially higher than the transmission ratio for the direct through drive. This keeps the required braking moment small and allows the use of a relatively small braking device.

Abstract: In a system for controlling a drive unit, particularly a boat drive unit, which comprises an internal combustion engine and a reversible gearing, with an operating member for adjusting the power and the direction of rotation, the operating member (1) feeds electric signals corresponding to the power and the direction of turning to a control device (5) which contains a microcomputer (6). Actuators (11, 12) for the power of the internal combustion engine and the switching of the reversible gearing respectively are connected to the control device (5). The control device (5) is developed in such a manner that switching of the reversible gearing is only possible when the speed of rotation of the internal combustion engine lies below a predetermined value.

Abstract: According to the present invention, there is provided a device for controlling a motor vehicle installed with an engine and an automatic transmission during a shift in gear positon in the automatic transmission, the automatic transmission having an input shaft drivingly connected to the engine and an output shaft. In the device, an actual value in a speed ratio is accurately detected and thus monitored during a transient period involving a shift in gear position taking place in the automatic transmission, and a closed loop control is effected based on the actual speed ratio detected.

Abstract: An electro-hydraulic control for an automatic transmission for an automotive vehicle, comprises a 3-2 timing valve, an overrun clutch control valve, an electromagnetic valve under the control of a computer, and a shuttle valve. The shuttle valve has a spool movable responsive to a line pressure variable with the engine throttle opening degree. The spool is movable between a first position where the overrun clutch control valve is under the control of the electromagnetic valve and a second position where the 3-2 timing valve is under the control of the electromagnetic valve.

Abstract: A control system for a continuously variable transmission has a line pressure control valve having ports and a spool for controlling the line pressure of oil supplied to a cylinder of a pulley device to change the transmission ratio. The line pressure control valve has chambers. When the transmission ratio reaches a maximum value after disengagement of a clutch, a line pressure reducing signal generates. The signal is applied to the line pressure control valve to shift the spool thereof, so that the line pressure is reduced to a minimum value. By controlling the pressure of oil supplied to the chambers in accordance with a desired line pressure, the spool is shifted, so that the line pressure is controlled.

Abstract: In order to avoid a large torque spike in a system in the event of a system failure, a shaft relative speed limiting system includes a lost motion device and a brake. The lost motion device is operatively associated with a pair of shafts normally driven at selected speeds such that one of the shafts drives the other of the shafts in the event of a system failure. The brake is operatively associated with the pair of shafts normally driven at selected speeds through first and second portions of a relative speed limiting device and limits the relative speed between the shafts in the event of a system failure. Additionally, the first portion of the relative speed limiting device is normally driven by one of the shafts at the selected speed thereof and the second portion of the relative speed limiting device is normally driven by the other of the shafts at the slected speed thereof in the shaft relative speed limiting system.

Abstract: A countershaft transmission auxiliary drive mechanism is provided for a countershaft transmission having an input shaft and a first gear connected thereto, and a second shaft having a second gear connected thereto and engaged with the first gear. A pump drive shaft is laterally offset from the first and second shafts, first and second pumps are connected to the opposite ends of the pump drive shaft, and a drive train is provided for rotating the pump drive shaft as a function of input shaft rotation. A PTO shaft and associated rotating clutch can be in coaxial alignment with the input shaft.

Abstract: By making the ratios of the gear pairs in a conventional single countershaft transmissions a particularly defined sequence, and mounting the gear elements that are not affixed to the countershaft so that, that of the first gear pair is free to rotate on and couplable to the input shaft, that of the second gear pair is free to rotate on the output shaft and couplable to both the input and output shafts, with those of the remaining pairs free to rotate on and couplable to the output shaft, the number of ratios in the transmission will be enhanced by a factor of two (2) and the continuum will be in a particular geometric progression. By extending the particularly defined ratio sequence to a series arrangement of similarly constructed gearboxes, the number of continuum ratios in the resulting transmission will be enhanced by a factor of three (3) to five (5) and the continuum will again be of the same geometric progression.

Abstract: An automatic transmission system in an automobile having an engine, a brake, a throttle valve, a shift lever, a clutch, and transmission gears associated with synchromesh systems. The automatic transmission system includes a throttle actuator for actuating the throttle valve, a clutch actuator for actuating the clutch, a gear selection actuator for selectively actuating the synchromesh systems to shift the transmission gears, a fluid-pressure control unit for applying working fluid pressures to the gear selection actuator, and an electronic control unit for issuing control signals to the throttle actuator, the clutch actuator, and the fluid-pressure control unit in response to detected signals indicative of a rotational speed of the engine, an operation of the brake, an operative position of the throttle valve, a selected position of the shift lever, a releasing position of the clutch, and a speed of travel of the automobile.

Abstract: An auxiliary device driving unit driven by an engine comprises an input member fixed to a crank shaft of the engine and provided with a disc-like portion and a cylindrical portion, an output member placed opposing the disc-like portion in a freely rotatable manner, the output member having the same axial center as the cylindrical portion of the input member, a plurality of planet cone members in a conical shape which are supported by the outer peripheries of the input and output members through partial contact, a speed change ring which is in contact with the cone generatrix of said planet cone members and is movable along the same axial center line as the input member, a speed change shaft having a feeding means for controlling movement of the speed change ring in the axial direction, a motor for rotating the speed change shaft, an electric circuit for controlling the motor, a driven member which is coupled to the output member through a ball cam and is rotatable on said cylindrical portion of input member a