Abstract: A hydromechanical transmission that can be used as a simple and efficient continuously variable transmission includes a differential mechanism for forming either a first mehanical transfer line for high speeds or a second mechanical transfer line for low speeds, a hydraulic power transmission mechanism having a hydraulic pump/motor, and a mode selector mechanism for selecting either a low-speed mode or a high-speed mode. In the low-speed mode, the output is connected to the input via the second mechanical transfer line. In the high-speed mode, the output is connected to the input via the first mechanical transfer line. One of the hydraulic pump/motors has a fixed displacement , while the other hydraulic pump/motor has a variable displacement.

Abstract: In a hydrodynamic-mechanical transmission for motor vehicles, consisting of a torque converter followed by a planetary gear with hydraulically actuable shift mechanism associated with the several transmission elements to select the various speeds, the planetary gear including a first sun gear connectable by way of a first clutch to the turbine rotor of the torque converter, a second sun gear connectable by way of a second clutch to the turbine rotor, a planetary mount connectable by way of a third clutch, bypassing the torque converter, directly to the engine drive shaft, on which mount first and second planet gears in engagement with each other and with the sun gears are mounted, and an internal gear constituting the drive output and in engagement with second planet gears meshing with the second sun gear, the possibility exists of reaching the third, direct speed either by purely hydrodynamic means including the torque converter by engaging the first and second clutches, by purely mechanical means bypassing

Abstract: A friction-based device for partial locking of a motor vehicle differential with at least one elastic friction segment between one or more sun gears of the differential and the crown gear driving the vehicle wheels, the at least one elastic segment contained under compression in a hole bored on the differential housing, the segment exerting radial pressure on the inside surface of the hole.This arrangement is particularly suitable for partial locking of the motor differential(s) for heavy road vehicles.

Abstract: A valve and closure assembly has a cover plate which attaches to a transmission housing to close the interior housing from atmosphere. A separator plate and a plurality of fluid valve assemblies are secured to the cover plate and disposed within the transmission housing. Fluid passages in the cover plate interconnect the valve assemblies. Passages in the separator plate direct fluid to passages in the transmission housing at the interface of the cover plate and transmission housing for distribution within the transmission housing to components disposed therein. Electrical wiring for the solenoids and an electrical connector are disposed on the cover plate so that a single electrical interconnection with the transmission can be utilized. Filters for both high pressure control fluid and low pressure cooling and lube fluid are secured on the cover plate.

Abstract: A power transfer device includes a planetary gear unit which includes a sun gear, a carrier, a ring gear, and a plurality of planet gears journaled on the carrier and in mesh with the sun and ring gears. The planetary gear unit is shiftable between first, second and third positions to establish a high speed two-wheel drive mode in the first position wherein the carrier is engaged with an input shaft and a first output shaft, and the sun gear is engaged with a second output shaft, and the ring gear is disengaged.

Abstract: A vehicle automatic transmission includes a torque converter which has a rotational power output member, and also includes a gear transmission mechanism. This gear transmission mechanism includes; a friction engaging mechanism; first and second rotational power input members; a first clutch which selectively engages the torque converter rotational power output member to the first rotational power input member; and a second clutch which selectively engages the torque converter rotational power output member to the second rotational power input member.

Abstract: A control system for a continuously variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The control system operates to control the transmission ratio in accordance with a desired ratio. The desired ratio is increased at rapid deceleration of a vehicle to increase actual transmission ratio so that the transmission ratio reaches a maximum ratio before the vehicle stops.

Abstract: A manual transmission comprises a primary shaft and first and second secondary shafts placed parallel with the primary shaft. First speed, second speed, fifth speed and reverse idling gears are rotatably mounted on the first secondary shaft. A first double synchronizer is mounted on the first secondary shaft between the first speed idling gear and the second speed idling gear. A second double synchronizer is mounted on the first secondary shaft between the fifth speed idling gear and the reverse idling gear. Third and fourth speed idling gears are rotatably mounted on the second secondary shaft. A third double synchronizer is mounted on the second secondary shaft between the third speed idling gear and the fourth speed idling gear. A third speed gear is mounted on the primary shaft and meshes with the third speed idling gear, the third speed gear being axially positioned between the teeth of the reverse idling gear and the second double synchronizer.

Abstract: A power transfer device for four-wheel drive includes a center differential of the bevel gear type arranged to split the driving torque from a power transmission into two torque delivery paths respectively for front-wheel drive and rear-wheel drive, a front-drive differential of the bevel gear type arranged coaxially with the center differential at one side thereof to transfer the split driving torque from a side gear of the center differential to front-wheel axles, an output gear for rear-wheel drive arranged coaxially with the center differential at the other side thereof to transfer the split driving torque from another side gear of the center differential to rear-wheel axles, and a limited-slip differential in the form of a viscous coupling assembled with a mounting case for the output gear to effect limited-slip torque proportional to the difference in rotational speed between the side gears.

Abstract: An accessory transmission for an automotive vehicle comprises a planetary gear set, a fixed cover and a cone clutch engageable with the ring gear of the planetary gear set or the cover to provide a direct drive or underdrive gear ratio in one embodiment, or a direct drive and overdrive gear ratio in another embodiment. The principles of the invention may also be applied to an embodiment wherein the ring gear rotation is governed by a one way clutch as well as the cone clutch to provide both underdrive and overdrive transmissions.

Abstract: A control system for a continuously variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The tansmission ratio control valve has chambers at both ends of the spool. By controlling flow rate of oil supplied to the chambers with a control signal in accordance with a desired transmission ratio, the spool is shifted, so that the transmission ratio is controlled to a desired transmission ratio. When the actual transmission ratio does not coincide with the desired ratio in a steady state of an engine, the control signal is corrected so as to reduce the difference between the desired transmission ratio and the actual ratio.

Abstract: A vehicular transmission with a main speed change mechanism that has plural speeds and a sub speed change mechanism for establishing a very low speed. Shift forks for selectively changing gear trains mounted on shift fork shafts with the sub speed shift fork mounted on the same shaft as the shift fork for the lowest speed of the main speed change mechanism. The shift fork shafts supported on one end by the transmission case and on the other end by the clutch case. A lever forms part of the sub speed change mechanism and is pivotally mounted on the transmission case by a pivot pin installed from the outside of the transmission case.

Abstract: A transmission comprises two planetary gear sets which are interconnected to provide four forward speeds and one reverse between an input shaft and an output shaft, and friction elements arranged to cause the two planetary gear sets to provide any one of the four forward speeds. The friction elements include a clutch and a one-way clutch arranged in series with the clutch.

Abstract: A torque proportioning differential utilizing helical face side gears and helical pinions is disclosed which is equivalent in torque capacity and interchangeable with bevel gear differentials in the same case and which is economical to manufacture.A differential structure, interchangeable with bevel gear differential components in the same case, composed of a drive cage in which are pocketed up to 8 helical pinions; two helical face side gears in concentric relationship on each side of the cage with teeth engaging the helical pinions; thrust-friction plates fixed alternately to the side gears and the cage and spring mechanism for pre-loading the friction plates. The helical face side gears connect with axle shafts to drive the load.

Abstract: A motor and associated gear system share an extended shaft axial with the motor. A rotor and a driving gear are attached to the shaft. Such an integral gearmotor concept minimizes coupling and sealing problems associated with prior art coupled motors and speed reducers. Particular housing features further enhance integrated advantages of the invention. Also, a reduction in the number of separate parts and use of a shim technique for establishing the stator/rotor air gap of the motor reduces prior art manufacturing costs associated with high precision borings while maintaining the accuracy of critical air gap characteristics. The shim feature of this invention is also equally and generally applicable to the establishment of air gaps in motors other than the present integral gearmotor.

Abstract: In a control device, especially for heating and ventilation systems in mo vehicles, comprising a rotatable control knob and a linearly movable setting member, a lever is provided for coupling the knob and member and converting rotational motion of the knob into linear movement of the setting member. To achieve this, the control knob 2 is provided with a guide slope extending at an acute angle to the axis of rotation. A shorter arm portion of the lever is controlled by the guide slope. A longer arm portion of the lever is actuated by movement of the shorter arm portion against the guide slope and acts upon a coupled setting member in a linear manner.

Abstract: In a motor vehicle power train including an automatic transmission calibrated to provide high quality shifting at a specified engine performance level, an engine spark timing control system effective in the course of transmission shifting for bringing the actual engine acceleration into correspondence with a predefined engine acceleration. The predefined engine acceleration corresponds to the acceleration which would occur at the specified engine performance level upon which the transmission calibration is based. As a result, high quality transmission shifting is achieved despite engine performance level variations.

Abstract: A control system (158) for a multi-speed splitter type change gear auxiliary transmission section (14) of a compound transmission (10) of the type permitting preselection of a selected auxiliary section gear ratio is provided. The control system includes an operator actuated selector valve (160) for selection of a desired auxiliary section gear ratio and for selectively pressurizing or exhausting first (2) and second (3) selectively pressurized and exhausted fluid conduits which are directly fluidly connected to first and second (186 and 184) inlet ports at the remotely located actuator assembly (152). The actuator assembly (152) includes pistons (144 and 150) for assuming at least three selectable positions corresponding to engagement of one of at least three selectable auxiliary transmission section ratios and is enclosed in a valve body housing (170) having enlarged cavities adjacent the inlet ports (182, 184, 186) to define enlarged fluid reservoirs (R.sub.1, R.sub.2, R.sub.

Abstract: A two-and-four-wheel drive shifting system of the type not including a differential gear unit comprises a pair of output shafts extending opposedly from each other and mounted rotatably independently of each other, an input member mounted concentrically and rotatably on one end of one of the pair of output shafts, and a sliding clutch mounted operatively on the other of the pair of output shafts. The sliding clutch having an engagement claw adapted to commonly engage with claws provided on one output shaft and on an input member in such a manner that the sliding clutch may be shifted in sliding motion in the axial direction along the other output shaft so as to selectively engage and disengage with either of the output shafts and the input member so that either the two-wheel or four-wheel drive position can be selected.

Abstract: Pressure regulating system for use in an automatic transmission including a fluid coupling, a belt drive continuously-variable speed transmission mechanism having an input pulley and an output pulley which are rotatably interlocked with a V-belt and a reduction ratio control system for controlling the reduction ratio of the belt drive continuously-variable speed transmission mechanism. The pressure regulating system includes a regulator valve capable of regulating the discharge pressure of an oil pump to provide a line pressure, a reduction ratio detecting valve and a throttle pressure valve. The reduction ratio detecting valve receives the line pressure and provides a pressure which is proportional to the displacement of the movable flange of the output pulley with respect to the corresponding fixed flange.