Abstract: An automatic transmission in a power unit with a torque converter and a hydraulic clutch to be engaged and disengaged for the switching of speed-change gears. Hydraulic pressure is applied to the clutch and is increased only when operating the clutch during acceleration of a vehicle. A pressure control valve is provided at a discharge port of an oil pump for supplying hydraulic oil to the hydraulic clutch. The pressure control valve includes a valve body, a valve element is axially slidably provided in the valve body, and a spring is provided between the valve element and the valve body in a sliding direction of the valve element for adjusting a set pressure for opening/closing of the pressure control valve. The valve element is urged in its closing direction by a repulsive force applied to a stator in the torque converter.

Abstract: The present invention provides a transmission for vehicle with an HST interposed in a drive power transmission path that includes: a housing; a center section having a plate-like shape with a first surface and a second surface opposite to the first surface with respect to a drive power transmission direction, and the center section being disposed within the housing; an input shaft extending through the center section; an output shaft disposed parallel with the input shaft and away from the same in a plate surface direction of the center section; a hydraulic pump body supported on the first surface of the center section and operatively connected to the input shaft; a hydraulic motor body supported on the second surface of the center section and being adapted to drive the output shaft upon receiving operational fluid discharged from the hydraulic pump body; a bearing plate fixed within the housing, facing either one of the first and second surfaces of the center section for supporting the input shaft; and an au

Abstract: A hydrostatic transmission and gear transmission located in the same or separate housings structures, and mechanically drivingly connected together by a power transmission shaft. That housing structure surrounding the hydrostatic transmission defining a first internal volume containing the hydrostatic transmission components and providing a receptacle for the hydrostatic fluid. That housing structure surrounding the gear transmission defining a gear compartment sump. As one example, the housing structure surrounding the hydrostatic transmission may further define a second internal volume to operate as an overflow receiver for fluid transferred from the first internal volume. A duct operating in accordance with the siphon principle connects the internal volumes and where a pressure restriction valves ensures an above ambient pressure level in the volumes when the hydrostatic and gear transmission is operating. Alternatively, the gear compartment sump may act as the second internal volume.

Abstract: A hydrostatic transmission and gear transmission located in the same or separate housings structures, and mechanically drivingly connected together by a power transmission shaft. That housing structure surrounding the hydrostatic transmission defining a first internal volume containing the hydrostatic transmission components and providing a receptacle for the hydrostatic fluid. That housing structure surrounding the gear transmission defining a gear compartment sump. As one example, the housing structure surrounding the hydrostatic transmission may further define a second internal volume to operate as an overflow receiver for fluid transferred from the first internal volume. A duct operating in accordance with the siphon principle connects the internal volumes and where a pressure restriction valves ensures an above ambient pressure level in the volumes when the hydrostatic and gear transmission is operating. Alternatively, the gear compartment sump may act as the second internal volume.

Abstract: A compact transmission for an internal combustion engine in a saddle ride type vehicle for operating on wasteland that effectively utilizes space and enables members to be laid out freely. A transmission for internal combustion engine, includes a crankshaft disposed in parallel to the operating direction of a vehicle body. A forward-running/backward-running changeover mechanism is provided wherein the supply sources of a working oil and a lubricating oil for an automatic transmission are arranged concentratedly on the side of a front crankcase cover. The changeover mechanism is provided between a rear crankcase and a rear crankcase cover. A forward-running/backward-running changeover shift drum is disposed on the upper side of a plane containing the axis of a main shaft and the axis of a counter shaft of the transmission. One end portion of a shift spindle projects from the rear crankcase cover at a position on a lateral side of the shift drum.

Abstract: An internal combustion engine including a torque converter on a crankshaft, and a single oil passage provided in the crankshaft for supplying, in common, both a working oil for the torque converter and a lubricating oil for the engine. A pump impeller of the torque converter is fixed to the crankshaft, and a clutch for connection and disconnection of engine output is provided on the side of a transmission.

Abstract: A transmission assembly with an infinitely variable transmission component and a constant transmission component wherein the components are designed as modular units. The variable transmission module forms a self-contained functional transmission unit with a variable transmission housing, open on at least one side where it contains a flange. Within the flange area extends at least one infinitely variable output shaft of the variable transmission module. The flange allows the attachment of one constant transmission module of a plurality of modules of different power categories as desired.

Abstract: A power-splitting transmission which consists of a hydraulic power branch (7) and a mechanical power branch. Leakage in the hydraulic power branch (7) as well as the activation apparatuses (12) in the mechanical power branch are supplied with a pressurized medium from a common pressure source (1). The common pressure source (1) transports pressure medium to the hydraulic power branch (7), through a damping apparatus (3), and simultaneously transports pressure medium to the activation apparatuses (12) of the shifting elements (13) of the mechanical power branch via a controller (11).

Abstract: A vehicle powertrain including a torque converter assembly having tandem torque converter sub-assemblies. An impeller, a turbine and a stator in the first sub-assembly are rotationally coupled to an impeller, a turbine and a stator of the second sub-assembly, with one of the three types of rotating elements preferably coupled to the other via a gear set. The two torque converter sub-assemblies can be axially adjacent to one another, allowing for a reduction in the diameter of the torque converter assembly, or they can be radially adjacent to one another, allowing for a reduction in the axial length of the torque converter assembly. The vehicle powertrain driving the torque converter assembly may include an engine, a motor or both.

Abstract: A driving system for an industrial truck, comprising: a combustion engine; a two-branch gear transmission the input of which is coupled to the shaft of the combustion engine and the outputs of which are coupled to a primary shaft and a secondary shaft which are at a fixed speed ratio to each other; an adjustable transmission in the course of the secondary shaft; a gear assembly the inputs of which are coupled to the primary and secondary shafts; a change-over transmission the input of which is coupled to the output of the gear assembly and the output of which is coupled to the driven shaft of the driving system.

Abstract: A torque converter is provided which comprises a converter cover for connection to a power source, a pump impeller attached to the converter cover, a turbine for connection to a transmission input shaft, a stator interposed between the pump impeller and the turbine, and a ring gear mounted on the converter cover and adapted to increase moment of inertia of the converter cover.

Abstract: To provide a motive-power transmission device for a vehicle including a torque converter, a gearbox, and a clutch for cutting off the transmission of motive power between the input shaft of the gearbox and the turbine of the torque converter. The gearbox is accommodated in the crankcase, and the motive-power transmission device is compact in the axial direction of the crankshaft. A motive-power transmission device for a vehicle includes the crankshaft and the input shaft of the gearbox journaled freely rotatably in the crankcase, their axes being parallel to each other; the torque converter is mounted on one end portion of the crankshaft; and the clutch is separated along the axial direction of the crankshaft from the torque converter and so mounted on one end portion of the input shaft that part of the clutch overlaps the torque converter as seen in the axial direction of the crankshaft.

Abstract: A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission servo control system. The vehicle ground speed is continuously monitored by a speed sensor operatively associated with a rotating gear in the vehicle drive train that rotates in proportion to vehicle ground speed, to create a ground speed signal. The selectable set speed signal can be input to controller memory by driving the vehicle at a desired ground speed and then activating a speed set switch. The speed control algorithm of the controller thereafter compares the set speed to the ground speed signal from the speed sensor and corrects the control signal to the proportional valve to correct hydrostatic transmission speed output.

Abstract: The invention concerns a driving disc for transmitting the torque from one drive unit to a hydrodynamic converter (2). The driving disc (5) has one leg (51) extending in radial direction and fastened on the output shaft (1) of the drive unit and one leg (52) extending in axial direction and fastened on supporting devices (4) of a housing (3) of the hydrodynamic converter (2). By recesses (10) spaced apart from each other in peripheral direction of the driving disc (5), there are formed in the leg (52) extending in axial direction bracket arrangements which serve to fasten the leg (52) extending in axial direction on supporting device (4) situated in the housing (3). The bracket arrangements are each formed by tongue-shaped brackets (11, 12; 11′, 12′) which seen in peripheral direction extend successively from both sides of the recess (10). The end areas of the brackets (11, 12; 11′, 12′) are each fastened on one supporting device (4).

Abstract: A gear transmission for keeping a load in balance at both ends of a crank shaft in an all-terrain saddle type vehicle provided with a transmitting unit capable of transmitting power from the crank shaft to the gear transmission and a generator connected to the crank shaft. A torque converter is provided with a lock-up clutch mounted on the crank case side of the torque converter and capable of directly connecting a pump to a turbine. A driving gear fixed to the turbine and capable of transmitting the output of the torque converter to the gear transmission is mounted on one end side of a crank shaft outside the crank case such that the lock-up clutch is sandwiched between the torque converter and the driving gear. A generator is mounted on the other end side of the crank shaft outside the crank case.

Abstract: A hydrostatic transaxle having a hydrostatic transmission module including a transmission housing, a rotating fluid pump and a rotatable fluid motor, the pump being of variable displacement, the motor being rotated at various speeds and in forward and reverse directions in response to changes in pump displacement; an axle drive unit including a housing and a speed reduction gear train having an input and an output disposed in the axle drive housing, the motor being operably coupled to the gear train input; a differential assembly having a rotating casing, the rotating casing being external to the transmission housing and axle drive unit housing; and a pair of axles extending from the differential assembly casing.

Abstract: A drive combination that is disclosed that is particularly suited for use in automobiles constructed to engage in acceleration racing. The drive combination includes a torque converter drive unit that is driven by an engine, and a countershaft transmission that that is driven by the torque converter drive unit. The disclosed drive combination requires less power to drive than known torque converter drive and planetary gear transmission drive combinations used for automobile racing and is lighter than such known drive combinations.

Abstract: In a power system for a vehicle, the line segment L connecting between the center O1 of a driving shaft (speed change shaft) of an oil hydrostatic non-stage transmission and the center O2 of a ball screw (ratio change driving shaft) of a ratio change mechanism is set parallel to the mating plane P of the crank case and the cylinder block, while the axis C2 of a detecting shaft is disposed coaxially with the turning axis C1 of a swash plate holder orthogonal to the line segment L, and, in this condition, a ratio detecting sensor is bolted to an upper wall. Wherein the axis C2 of the detecting shaft is set parallel to the cylinder axis C0, and the machining axis for a crank chamber and the machining axis for a fitting portion for the ratio detecting sensor are set parallel to each other.

Abstract: An automated twin-clutch multi-speed transmission includes a first engine clutch operable to establish a releasable drive connection between the engine and a first input shaft, a second engine clutch operable to establish a releasable drive connection between the engine and a second input shaft, an output shaft and a geartrain for selectively establishing a plurality of forward and reverse speed ratio drive connections between the input shafts and the output shaft. The transmission further includes power-operated dog clutches for selectively engaging constant-mesh gearsets associated with the geartrain, and a transmission controller for controlling coordinated actuation of the first and second engine clutches and the power-operated dog clutches. A clutch control system includes a first hydraulic pump driven by the first input shaft, a second hydraulic pump driven by the second input shaft, and flow control valving for controlling fluid flow between the first and second pumps.

Abstract: A mechanical-hydrostatic transmission particularly for tools and vehicles suitable for gardening, such as lawn-mowers or the like, comprising a reduction unit, a clutch unit, an oil pump and a hydraulic motor which are integrated and contained within a single casing, the pump and the clutch unit being arranged coaxially on a first shaft which is connected externally, by means of a coupling, to motor means, the pump being hydraulically connected to the hydraulic motor and the hydraulic motor being in turn axially associated with a second shaft from which a power take-off extends. The casing contains kinematic connections for transmitting motion to the driving wheels.

Abstract: A transmission for a vehicle has a pair of input shafts and an output shaft parallel to the input shafts. A plurality of drive gears is installed on the input shafts, and a plurality of driven gears are installed on the output shaft and meshed with the drive gears, respectively. Gear selecting mechanisms is provided respectively on the shifting input shafts to select one of the drive gears. A power transmitting mechanism is installed to the input and output shafts to transmit power from one of the input shafts to the other input shaft. First and second clutches are installed to the input shafts, respectively to fix the drive gears on the input shafts by the engagement thereof. An idler gear driven by the power transmitting mechanism is installed to the output shaft. A third clutch installed to the output shaft as to be capable of fixedly connecting the output shaft and the idler gear.

Abstract: A modular hydrostatic transaxle includes an axle module removably connected to a hydrostatic transmission module. The axle module includes a differential connected to a reduction gear train and disposed in an axle casing. A pair of axles are connected to the differential and supported within the axle casing. The hydrostatic transmission module comprises a transmission casing separate from the axle casing and hydraulically connected pump and motor disposed in the transmission casing. The motor output connection includes a shaft piloted to an input drive of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels are hydraulically connected through the pump and motor block at 90° orientation, and a portion of the pump and motor block forms an inclined surface which supports a face of a thrust bearing.

Abstract: An automated twin-clutch multi-speed transmission adapted to transfer power from the engine to one or more drivelines of a motor vehicle. The transmission includes a first engine clutch operable to establish a releasable drive connection between the engine and a first input shaft, a second engine clutch operable to establish a releasable drive connection between the engine and a second input shaft, an output shaft adapted to transfer power to the driveline, and a geartrain for selectively establishing a plurality of forward and reverse speed ratio drive connections between the input shafts and the output shaft.

Abstract: A powershift transmission for a work vehicle is disclosed having two modes of applying power: a direct connection through a series of gears, and a connection through a torque converter integral with the transmission. The two paths branch at the input shaft, on which is mounted and which drives a torque converter that has a gear coupled to its output. Another gear on the input shaft is connected to that shaft by a hydraulic clutch. When the clutch is engaged, the transmission provides several high-range forward gear ratios through a direct gear drive. When that clutch is disconnected, the torque converter supplies power to the transmission to low forward and low reverse ranges of gear ratios. The transmission includes a first countershaft, on which are mounted a reverse master clutch engaged in all reverse gear ratios) and a forward low range clutch, which is engaged in the low range of forward gear ratios. The reverse master clutch couples the countershaft directly to the output shaft.

Abstract: A drive combination that is disclosed that is particularly suited for use in automobiles constructed to engage in acceleration racing. The drive combination includes a torque converter drive unit that is driven by an engine, and a countershaft transmission that that is driven by the torque converter drive unit. The disclosed drive combination requires less power to drive than known torque converter drive and planetary gear transmission drive combinations used for automobile racing and is lighter than such known drive combinations.

Abstract: In a transmitting system for a small-sized vehicle in which a crankshaft and an input shaft of a transmission are connected to each other through a fluid transmitting device such as a torque converter. A primary reducing device, the fluid transmitting device and a shifting clutch are disposed on the crankshaft sequentially from one side of a crankcase supporting the crankshaft with a bearing interposed therebetween toward the outside, and the axial movements of the input member, the pump impeller and the turbine impeller on the crankshaft are restrained by the bearing and a nut threadedly fitted at a tip end of the crankshaft. Thus, a creep phenomenon of the fluid transmitting device can be eliminated by controlling the shifting clutch, and the shifting operation of the transmission can be conducted lightly. Moreover, the transmitting system is of a simple construction and improved in assemblability.

Abstract: A vehicle includes a variable speed hydrostatic transmission which drives through a gear transmission, having selectable gear ratios, to provide propulsion power to a pair of drive wheels. The hydrostatic transmission is used as a brake to supplement the braking ability of the vehicle. The gear transmission is provided with a positioning plate which is mounted for pivoting between respective positions corresponding to different transmission gear ratios in response to a gear shift lever being moved between corresponding positions. Provided for ensuring that the gear transmission is not shifted to neutral while the vehicle is in motion, and the consequent loss of the ability of the hydrostatic transmission to provide braking, is a blocking arrangement, including a vehicle motion responsive sensor, that operates to prevent the movement of the positioning plate, so long as the vehicle is in motion.

Abstract: The invention provides a transmission mechanism for use in a vehicle including a vehicle body having one side toward a first direction along the length thereof and the other side toward a second direction opposite to the first direction, the vehicle comprising a differential gear unit 11, an HST 8 and an engine 7 which are arranged in the vehicle body from the first direction side toward the second direction. A transmission 10 is provided between the differential gear unit 11 and the HST 8, whereby the power of the engine 7 is transmitted through the transmission 10 and input to the HST 8 at the first direction side thereof. The transmission mechanism of simple construction serves to shorten the overall length of the vehicle while preventing the rise of the center of gravity of the vehicle.

Abstract: An automatic transmission system for a vehicle having a plurality of drive gears mounted on an input shaft, a plurality of driven gears mounted on an output shaft and meshing with the drive gears, a torque converter disposed between a crankshaft of an engine and the input shaft, synchromesh mechanisms for synchronously engaging the drive gears with the driven gears and a shift controller for automatically actuating the synchromesh mechanisms so as to obtain a required gear ratio, includes a lock-up clutch incorporated in the torque converter for connecting a turbine shaft of the torque converter with the crankshaft, an electronically controlled throttle valve for automatically operating to reduce a rotation speed of the crank shaft when the gear is shifted, a bypass clutch for transmitting torque from the input shaft to the output shaft when the gear is shifted while the electronically controlled throttle valve operates to reduce a rotation speed of the crankshaft, an input clutch provided between an output e

Abstract: With regard to an automatic transmission in which an oil passage is formed by interposing a separator plate between a torque converter case and a valve body, a housing of a bearing that supports a counter shaft is press-fitted in a recess of the torque converter case, the edge of the separator plate abuts the outer periphery of the housing, and a notch formed on the valve body superimposed on the separator plate is in contact with the end face of the housing, thereby preventing the bearing from falling out. When supporting the bearing in the recess of the torque converter case, the present invention enables the bearing having a large axial dimension to be supported without deepening the above-mentioned recess.

Abstract: A hydraulic circuit, particularly for an automated twin clutch transmission for motor vehicles, comprises a countershaft transmission with two parallel power transmission branches, and two clutches, comprising:

Abstract: A drive combination that is disclosed that is particularly suited for use in automobiles constructed to engage in acceleration racing. The drive combination includes a torque converter drive unit that is driven by an engine, and a countershaft transmission that that is driven by the torque converter drive unit. The disclosed drive combination requires less power to drive than known torque converter drive and planetary gear transmission drive combinations used for automobile racing and is lighter than such known drive combinations.

Abstract: A drive unit provided with a power transmission path interlockingly connecting an engine (E) to left and right sprockets (12L, 12R), which are adapted to drive left and right crawlers (11) of left and right traveling parts (1L, 1R), via a non-stage traveling transmission unit (21) and an auxiliary traveling transmission unit (28) capable of changing the speed of a working vehicle in a plurality of stages. The power transmission path is provided with a non-stage steering transmission unit (20), left and right steering transmission units (48L, 48R) and left and right planetary gears (40L, 40R) all of which are adapted to be operated for speed change in accordance with a turning operation of a steering wheel (7). This construction enables a pivot turn and a spin turn of a working vehicle body to be made, the swinging performance of the working vehicle to be improved, the maneuvering of the vehicle to be done easily, and the construction of the drive unit to be simplified.

Abstract: A gear transmission for keeping a load in balance at both ends of a crank shaft in an all-terrain saddle type vehicle provided with a transmitting unit capable of transmitting power from the crank shaft to the gear transmission and a generator connected to the crank shaft. A torque converter is provided with a lock-up clutch mounted on the crank case side of the torque converter and capable of directly connecting a pump to a turbine. A driving gear fixed to the turbine and capable of transmitting the output of the torque converter to the gear transmission is mounted on one end side of a crank shaft outside the crank case such that the lock-up clutch is sandwiched between the torque converter and the driving gear. A generator is mounted on the other end side of the crank shaft outside the crank case.

Abstract: A torque converter 1 equipped with a lockup device 8 is provided to secure sufficient space in the axial direction for the damper in a hydraulic torque transmitting device provided with a lockup device having a damper. Lockup device 8 is disposed between a front cover 4 and a turbine 6. Lockup device 8 has a clutch mechanism 31 for mechanically coupling front cover 4 and turbine 6 and a damper mechanism 32 for absorbing and attenuating torsional vibrations. In the vicinity of its outlet, turbine 6 has a linearly shaped part 62 that is aligned with damper mechanism 32. As a result, the axial dimensions of torsion springs 52 can be enlarged.