Abstract: The invention relates to a drive train (20) for an agricultural working vehicle (10), comprising a drive motor (22), a main transmission (24), a vehicle axle (26) driven by means of the drive motor (22) and the main transmission (30), and a post-transmission (60), which is arranged between the main transmission (30) and the vehicle axle (26) and has at least two gear ratios, characterized in that a first gear ratio can be selected by means of a first shifting element (64) arranged on a main shaft (62) of the post-transmission (60) and a second gear ratio can be selected by means of a second shifting element (68) arranged on a countershaft (66) of the post-transmission (60).

Abstract: An air boost system for a two-cycle engine, such as an EMD engine, which operates with one or more roots blowers, or for similar engines that use gear-driven roots blowers or centrifugal blowers. At least one of the roots blowers is equipped with a variable transmission, which allows airflow into the engine to be varied in accordance with load or other engine operating conditions.

Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. At least one of the first and second hydraulic units has variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft and the rotatable component of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.

Abstract: There is provided a tractor with an improved clutch housing structure, which includes a hydro-static transmission (HST) positioned between a clutch and a secondary transmission, to transmit power. The tractor comprises: a clutch housing with the clutch and the HST positioned inside; a partition to separate the clutch from the HST formed inside the clutch housing; and a heat-radiating opening formed in the partition.

Abstract: An automotive transmission has a hill-hold (H) mode for preventing a vehicle parked on a slope from rolling downward, a reverse (R) mode, a neutral (N) mode, and a drive (D) mode, in which a H position and a R-range are arranged next to and connected to each other in a shift gate.

Abstract: An agricultural machine includes an engine for power delivery, at least one axle provided with two wheels, a handlebar and a power take-off. The agricultural machine further includes a hydromechanical clutch group interposed between the engine and the at least one axle and a first and a second lever associated with the handlebar controlling the hydromechanical clutch group. The hydromechanical clutch group includes a actuation piston hydraulically controlled by the first and second lever movable between a first raised position, in which the actuation piston imposes to the hydromechanical clutch group the transmission of the motion from the engine to the wheels and to the tool, and a second lowered position in which the actuation piston frees the hydromechanical clutch group by kinematically disconnecting the engine from the wheels and the tool.

Abstract: Provided is a combine with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that receives an input of drive force from an engine, and subjects the drive force to speed change; and a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus, wherein a power transmission case can be made lighter at low cost. In this combine, a continuously variable transmission case portion of a power transmission case, which houses a continuously variable transmission unit, is formed integrally with a planetary power transmission case portion of the power transmission case, which houses a planetary power transmission unit.

Abstract: The motor cooling system circulates cooling oil for cooling a motor. A transmission is configured to change a rotation speed ratio of an output shaft with respect to an input shaft by changing a rotation speed of the motor. A transmission case has an output shaft case for housing the output shaft. The output shaft case is positioned forward of the motor and protrudes to a position below the motor. The motor cooling system has a cooling oil tank for storing the cooling oil and a cooling oil pipe which connects a cooling oil tank and the motor. The cooling oil tank is positioned behind the output shaft case and under the motor.

Abstract: A variable transmission includes an input shaft, two planetary gear sets, a first planetary set on the input side of a variator, and a second planetary set on the output side of the variator, to split the torque drivingly engaged with a variator comprising, a first ring assembly, a second ring assembly; various arrangements of brakes and clutches; a gearbox; and the output shaft to produce transmissions with continuously variable or infinitely variable torque output ratios.

Abstract: A hydraulic drive comprising multiple gear motors each having a gear motor output shaft, and a common gear engaged by the output shafts of the multiple gear motors. Each hydraulic motor has a characteristic sinusoidal torque ripple out of phase with the characteristic sinusoidal torque ripple of at least one other hydraulic motor for cancelling torque ripple and thereby reducing the torque ripple at the common gear.

Abstract: A method for controlling an automated clutch, which comprises a hydraulic clutch actuating system having a hydrostatic actuator, the pressure of which is detected. The method includes using the pressure of the hydrostatic actuator to adapt the characteristic curve of the clutch.

Abstract: A powertrain includes an engine and a continuously variable transmission including a planetary gear arrangement and a variator. An input drives the variator and the planetary gears. A first planetary output gear is connected to the first output of the planetary gear arrangement. A second planetary output gear is connected to the first output, and a third planetary output gear is connectable by a first clutch to a second output of the planetary gear arrangement. A first output member is connected to the third planetary output gear, a second clutch releasably connects the first output member with the first planetary output gear, a third clutch connects the first output member with the second planetary output gear, a fourth clutch connects the second output member with the first planetary output gear, and a fifth clutch connects the second output member with the second planetary output gear.

Abstract: A device (2) for a vehicle drivetrain (1) with a transmission unit (3) for changing various transmission ratios and with a hydraulic device (4). The device (2) can provide a drive torque in the area of the drive output (5) of the vehicle drivetrain (1) and in whose area a drive output torque of the vehicle drivetrain (1) can be at least partially supported. A reversing gear system (6) is connected, upstream of the transmission unit (3), for reversing the rotation direction and the hydraulic device (4) can be brought into active connection with the transmission unit (3) by way of the reversing gear system (6).

Abstract: A sun gear of a first planetary gear train is connected to an input shaft. A carrier 9 of the first planetary gear train is connected to a sun gear of a second planetary gear train and to a first pump/motor. A ring gear of the first planetary gear train is connected to a second pump/motor, and a ring gear of the second planetary gear train is connected to an output shaft. A first clutch is provided for engaging and disengaging a carrier of the second planetary gear train and the ring gear of the first planetary gear train with and from each other, and a second clutch is provided for engaging and disengaging the carrier of the second planetary gear train and a fixed end with and from each other.

Abstract: A stepper motor suitable for use in a medical imaging environment has (a) a cylindrical central gear having an external surface with circumferentially distributed and radially directed teeth, (b) a shaft for mounting the central gear such that it is constrained to move in rotational motion about its centerline, (c) a cylindrical hoop gear having a bore with an internal surface having circumferentially distributed and radially directed teeth, (d) level arm crank mechanisms for mounting the hoop gear such that it is constrained to move in translational-circular motion about the central gear's centerline, wherein this central gear is further configured to fit within the hoop gear's bore in such a manner that a plurality of the central gear and hoop gear teeth intermesh and cooperate so that the planetary movement of the hoop gear causes the central gear to rotate, and (e) piston mechanisms for applying a fluid pressure driven force to specified points on the hoop gear so as to cause its movement.

Abstract: A vehicle air-conditioning apparatus includes a dehumidification means, which has a compressor and dehumidifies inside of the vehicle, a humidity calculation means, which calculates humidity in the vicinity of an inside surface of the windshield, and a determination means, which determines whether the windshield is fogged on the basis of comparison between the humidity and a predetermined value. A defogging operation for heightening dehumidifying performance of the dehumidification means is performed, when the determination means determines that the windshield is fogged in a state where the compressor is turned on. The dehumidifying performance of the dehumidification means is lowered or condition in which the defogging operation is started is made to be difficult in the next defogging operation, when the windshield is determined to be fogged and the defogging operation is not manually performed in a state where the compressor is turned off.

Abstract: A drilling machine drills foundation holes known as drilled shafts or bored piles with a drilling tool attached to an end of a kelly. The kelly is rotated with a rotary drive. The rotary drive has a first motor, a final drive gear coupled to the kelly so as to rotate with the kelly and a planetary gear set between the first motor and the final drive gear. A second motor is coupled to the ring gear on the planetary gear set. A clutch can also be connected to the ring gear. The rotary drive allows the drilling tool to be rotated at low drilling speeds and, without stopping rotation or shifting gears, removed from the hole and accelerated to high speeds to discharge spoil. A mid-range is also possible, wherein the drilling tool can process fluids in the hole. Another motor and planetary gear set can be coupled to the final drive gear and to the second motor.

Abstract: A hydromechanical transmission having a continuously variable transmission function and occupying a small area for installation is provided. For this purpose, the transmission includes a driving source (3), a planetary gear speed reducer (5) connected to the driving source, a variable displacement hydraulic pump (11), which is connected to the planetary gear speed reducer, and to which one part of an output force of the driving source is outputted, an output shaft (717), which is connected to the planetary gear speed reducer, and to which the other part of the output force of the driving source is outputted, a first and a second variable displacement hydraulic motors (31, 37) receiving pressure oil from the hydraulic pump and outputting a driving force to the output shaft, and a clutch (45) placed between the second hydraulic motor (37) and the output shaft.

Abstract: The invention provides a hydraulic drive apparatus which obtain a desired speed reduction ratio and a reduced shock during clutch engagement. Accordingly, the hydraulic drive apparatus for a working machine has a variable capacity type first (8) and second hydraulic motor (11), a first input shaft (5) and a second input shaft connected respectively (7). The hydraulic drive apparatus transmits a torque from the first and the second hydraulic motor to an output shaft (2). A planetary gear (21) is interposed between the second hydraulic motor and the second input shaft, and a clutch (10) freely engaging the second hydraulic motor with the second input shaft is provided between a ring gear (29) of the planetary gear and a housing (24). A modulation damper (22) for reducing a clutch pressure (P3) before the engagement and reducing at a time of engagement is provided.

Abstract: An apparatus, for controlling a plurality of hydraulic motors and a clutch for driving a drive shaft, can prevent a speed change shock and a load slip of a hydraulic motor as well as making a structure simple. The apparatus includes: a first volume variable hydraulic motor (1), connected to the drive shaft (3) through the clutch (5); a second volume variable hydraulic motor (2), which is always connected to the drive shaft (3); first tilt rotation control means (7, 8), for controlling a tilt rotation amount (a discharge volume cc/rev) of the first hydraulic motor by receiving a drive side pressurized oil (Pac) of the first hydraulic motor; and a zero tilt rotation holding means (10, 10A), for holding the tilt rotation amount of the first hydraulic motor at substantially zero in a state wherein the tilt rotation amount of the first hydraulic motor is controlled to be substantially zero.

Abstract: A power of an input shaft driven by an engine is divided by a power dividing device and transmitted to first and second output shafts and a hydraulic pump of a hydrostatic continuously variable transmission is driven by the first output shaft, whereas a hydraulic motor is driven by the second output shaft through a mechanical transmission device and also by the hydraulic pump. A main oil pump is provided at the input shaft which rotates at the same speed as an engine speed, and a subsidiary oil pump is provided at the first output shaft which decreases rotational speed thereof to zero with an increase in the engine rotational speed. In a low rotational speed region of the engine, oil is supplied by both the main oil pump and the subsidiary oil pump, whereas in a high rotational speed region of the engine, oil is supplied by only the main oil pump.

Abstract: A hydrostatic transmission has at least one pump, first and second motors connected to and driven by the pump and having respective first and second motor shafts, and a planetary-gear drive. This drive has a sun gear connected permanently to the first motor shaft, planet gears in mesh with the sun gear, a planet carrier carrying the planet gears and forming an output, and a ring gear meshing with the planet gears. First gearing and a first clutch are connected between the motor shafts and a brake connected to the ring gear is actuatable to arrest same. A second clutch is connected between the second motor shaft and the ring gear. In a first range the first clutch is closed, the second clutch is opened, and the brake is actuated to drive the sun gear with both shafts with the ring gear stopped. In a second range the first clutch is opened, the second clutch is closed, and the brake is released to drive the sun gear with the one shaft and the ring gear with the other shaft.

Abstract: An apparatus for providing an automatic transmission, including at least one planetary gear, at least one braking pump, at least one flow control valve and an oil path system provided therebetween for obtaining a continuously variable transmission (CVT). Each braking member of at least one planetary gear of the present invention is connected to each rotor shaft of at least one braking pump. A sensing means is provided for sensing a rotation speed of a rear propeller shaft and to output predetermined amounts of pressurized working fluid in response to the rotation speed of the rear propeller shaft. A first flow control valve provided on an oil path system is controlled by the pressurized working fluid to be closed to various extents so as to reduce the flow within the oil path system. The rotation speed of at least one braking pump together with each braking member is also reduced, on extreme conditions the pumps even stop.