Abstract: An improved control system and method for an automatic/semi-automatic transmission system (10) including an automatic change gear transmission (12) driven by a throttle (26) controlled engine (14) is provided. The control system includes a processing unit (42) for receiving inputs indicating at least throttle position (THL) and vehicle speed (OS) and for determining vehicle deceleration (dOS/dt) and for processing these inputs in accordance with a program or logic rules to determine the selected engaged gear ratio and for issuing command signals to a transmission shifting mechanism (34). The processing unit includes logic rules by which vehicle performance is maximized and the control will evaluate and allow and/or execute skip downshifts upon sensing conditions indicative of vehicle deceleration due to ascending a steep grade.

Abstract: A stepless speed change device including an eccentric cam assembly whose eccentricity is adjustable relative to a center shaft, a carrier rotatably arranged about the eccentric cam assembly, rotary members on input and output sides, respectively, and a plurality of friction pieces arranged in two rows each including a plurality of the friction pieces. The friction pieces in one row are rockably connected to the rotary member on the input side and free ends of the friction pieces are engaged with an inside of the carrier. The friction pieces in the other row are rockably connected to the carrier and free ends of the friction pieces are engaged with an inside of the rotary member on the output side. As an alternative, all the friction pieces are rockably connected to the carrier and free ends of the friction pieces in one row and the other row are engaged with insides of the rotary members on the input and output sides, respectively.

Abstract: The invention is a system to override electric control units which normally overns the transmission and fuel regulating valve of an automotive vehicle. The system includes a first linkage to mechanically operate the automatic transmission, a bypass valve hydraulically in parallel with the fuel regulating valve, and a second linkage to mechanically operate the bypass valve. The linkages are connected to a control assembly in the driver's compartment of the vehicle, the assembly having two moveable members for manually actuating the linkages. The control assembly has a mechanism for keeping the bypass valve closed during selected gears or modes of the transmission. This mechanism also prevents the the transmission from shifting gears when the bypass valve is open.

Abstract: A variable speed manual transmission includes an input shaft having a first drive gear for low speed drive and a second drive gear for high speed drive fixed thereon, an output shaft located under the input shaft and in parallel therewith and having at least a pair of axially spaced changed-speed driven gears fixed thereon, a first coutershaft arranged in parallel with the input and output shafts and having a first driven gear fixed thereon and continuously engaged with the first drive gear, a pair of axially spaced low speed drive gears rotatably mounted thereon and continuously engaged with the change-speed driven gears on the output shaft, and a first synchronizer coupling provided thereon to selectively connect the low speed drive gears to the first countershaft, and a second countershaft arranged in parrallel with the input and output shafts and having a second drive gear fixed thereon and continuously engaged with the second drive gear on the input shaft, a pair of axially spaced high speed drive gears

Abstract: A hydraulically, vacuumatically controlled infinitely variable speed drive transmission connecting an input shaft to an output shaft, comprising a plurality of sets of adhesion rollers mounted radially of the input and output shafts in diammetrically opposed relation to one another. The adhesion rollers are movable radially of input and output shafts under centrifugal force imparted thereto by the rotation of the aforesaid shafts. A pair of self-adjusting, floating disks are mounted to either side of said adhesion rollers and are engageable with said rollers at varying radial distances of the rollers from the axis of the input and output shafts whereby to vary the rate of rotation of said disks. The transmission further includes a planetary gear arrangement for coupling the input shaft to the output shaft and which is responsive to variations in the rate of rotation of the disks to cause the speed ratio between the input and output shafts to correspondingly vary.

Abstract: The device comprises first and second planet wheels having a common axis, first and second pairs of first satellite gear wheels meshing respectively with the first and second planet wheels, the two gear wheels of each of the said pairs being rotatable on a differential housing coaxial with the planet wheels and having axes lying respectively in first and second planes orthogonal to one another and passing through the first-mentioned said common axis; the device further includes two pairs of second satellite gear wheels also rotatable on the differential housing and having axes lying in the same plane orthogonal to the first and second first-defined planes, each of the second satellite gear wheels meshing simultaneously with one of the said first satellite gear wheels belonging to the first pair and with one of the said first satellite gear wheels belonging to the second pair in such a way that drive can be transmitted from one of the said first satellite gear wheels of one of the said pairs simultaneously to

Abstract: A control valve arrangement for a continually variable transmission includes a first valve for regulating pressure in a primary servo for the gear ratio of the transmission and a second valve for regulating pressure in a secondary servo controlling tension of the drivebelt. These valves are acted upon by a throttle shaft as a function of output torque of the engine. A modulating device varies pressure in the secondary servo as a function of the gear ratio and of engine torque. The modulating device comprises a lever having one end acted upon by a cam disk as a function of the engine torque and second end acted upon by a valve element of the second regulating valve. The second lever is extended radially outward from a pivot. A sensor arm acts as a function of the gear ratio on one end of the second lever, whose other end is rotatably pinned to the first lever.

Abstract: A limited slip differential comprises a bevel gear differential having side gears and planet gears carried by a planet gear support which is capable of limited rotation relative to the carrier. When the side gears carry unequal torques the support tends to rotate and moves a pressure ring axially due to complementary cam surfaces on the support and the ring and this engages a friction clutch which connects a viscous shear coupling between the side gears.

Abstract: An electronic powershift control system for an implement transmission having a plurality of selectively operated electrically controlled hydraulic powershift clutches. The system includes a manually positionable gear selector connected to electrical control circuitry. The electrical control circuitry receives input shift signals from the gear selector indicative of the shift desired and, in response, produces output shift signals for operating various hydraulic powershift clutches over a predetermined time to effect the desired shift. The electrical circuitry further incorporates a feed back loop which allows the circuitry to monitor shift performance effected during the desired shift and, if necessary, adjust the predetermined time of powershift clutch operation the next time the same shift is selected by the operator.

Abstract: An automatic transmission control system for controlling an automatic transmision for use in a vehicle provided with a throttle control system which electrically controls a throttle valve to control the engine output according to the amount of depression of the accelerator pedal and a constant-speed cruising control system which makes the vehicle cruise at a desired constant speed includes a first gear-stage setting system which designates a gear stage of the automatic transmission on the basis of a first gear-shifting pattern, which applies when the constant-speed cruising control is not performed, and in which the gear stages of the automatic transmission are related to the detected amount of depression of the accelerator pedal and the vehicle speed or a value corresponding to the vehicle speed, and a second gear-stage setting system which designates a gear stage of the automatic transmission on the basis of a second gear-shifting pattern, which applies when the constant-speed cruising control is performed

Abstract: The speed reduction ratio of a continuously variable speed transmission on a motor vehicle is controlled by continuously varying the speed reduction ratio in a range between a maximum speed reduction ratio and a minimum speed reduction ratio. A top limit speed reduction ratio corresponding to a speed of the motor vehicle and being higher than the minimium speed reduction ratio is set in a low vehicle speed range. The speed reduction ratio is controlled only between the maximum speed reduction ratio and the top limit speed reduction ratio in the low vehicle speed range.

Abstract: A stepless transmission is provided with an input shaft having gear structure. A variator shaft also has gear structure. A variator is connected between the input shaft and the variator shaft. The variator alters the relative speeds of rotation between the input shaft and the variator shaft. An output shaft has gear structure that is operatively connected to the input shaft gear structure and the variator shaft gear structure. The speed and direction of rotation of the output shaft is related to the difference between the tangential velocities of the input shaft gear structure and the variator shaft gear structure acting on the output shaft gear structure. Structure for increasing the rotational speed delivered from the input shaft to the variator can be provided. Reduction structure for gearing down the rotational speed of the variator shaft gear structure can also be provided. Controls for the transmissions are also disclosed.

Abstract: An apparatus for controlling a transmission includes a detecting device for detecting the speed of rotation of an electric motor of a selecting actuator and a learning device for learning angular positions of the motor which correspond respectively to gear selecting positions based on a detected signal from the detecting device. Gear selecting operation of the selecting actuator is controlled by the learned angular positions of the motor.

Abstract: A planetary gear system comprises a plurality of external gears swingably rotated by at least three eccentric members juxtaposed axially with their phases offset from each other; an internal gear internally meshing with these external gears; and a flange for retaining pins fitted with a play in internal pin holes formed in the external gears. This planetary gear system is used as a planetary reduction gear when the eccentric members are rotatively driven with either one of the internal gear or the flange being held stationary, so as to obtain an output of reduced rotation, or as a planetary overdrive gear in which either one of the internal gear or the flange is held stationary, and an input is applied to the other to obtain an output of accelerated rotation from a shaft on which the eccentric members are installed. All the eccentric members are formed integrally as one component.

Abstract: A mechanical torque converting transmission for producing an output with variable, controllable speed and torque characteristics comprises a rotary input shaft adapted for attachment to a rotary power source and connected to a main drive gear. The drive gear is meshed with a plurality of pinion gears which are journaled for rotation on an arm assembly. An eccentric device is driven by each pinion gear for creating a centrifugal force that cyclically urges the arm assembly in alternating forward and backward directions with a pulsating motion during each rotation of each eccentric device. A clutch is provided for allowing forward movement of the arm assembly while preventing movement in the backward direction during each eccentric revolution.

Abstract: A multi-speed transmission with a shift mechanism which selectively couples at least a forward and a reverse gear operatively positioned on a shaft. The shift mechanism is disposed entirely within the transmission housing and includes a shift key arranged for sliding movement of the key in the shaft. An improved neutral collar is positioned on the shaft between the forward and the reverse gears. The neutral collar has its widest cross section centrally located thereto. From this widest central cross section, the neutral collar profile tapers along the inside surface thereof to relatively narrow cross section at each end thereof.

Abstract: A method of controlling the speed change of a kickdown shift for an electronic automatic transmission system by predicting how much time remains to fill the apply element after having achieved a predetermined target speed for the turbine of the torque converter.

Abstract: A control for an extended range splitter type compound transmission (10) comprising a main transmission section (12) connected in series with a splitter type auxiliary transmission section (14) connected in series with an extended range section (15) is provided. The main section shift lever (72) has a first (1) and a second (1E) position for selection of low ratio (50). Selection of the second position (1E) will automatically cause the extended range section clutch (206) to be shifted to the speed reduction position thereof.

Abstract: A carrier assembly has a pair of side plates with axially aligned apertures in which are disposed pin members for rotatably supporting pinion gears. Each pin member has a slot which is alignable with a groove formed in one of the side plates. A locking plate has radially extending tab members which are positionable in respective ones of the groove and slots by simultaneous rotation of the pins and locking plate about their respective axis during assembly. A spring pin or roll pin is secured in an aperture in the grooved side wall and cooperates with a notch in the locking plate to prevent rotation thereof relative to the side plate after assembly with the pins.

Abstract: Apparatus for controlling at least three shift valves operating four hydraulic clutches in a hydraulically operated vehicular transmission. The shift valves are serially located and alternately switched to establish successive first through fourth-speed transmission trains. Each shift valve is urged to one position by a respective spring and has an oil chamber at its opposite for oil pressure to urge it to its other position. Additionally, the first shift valve has another oil chamber at its spring end. A first electromagnetic open-air pressure dump valve is connected to a first oil passage through which oil is inputted to the first oil chamber of the first shift valves and the oil chamber of the second shift valve. A second electromagnetic open-air pressure dump valve is connected to a second oil passage through which oil is inputted to the other oil chamber of the first shift valve and the oil chamber of the third shift valve.