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| Number | Title | Issue Date |
| 7354368 | Method and means for shifting a hydromechanical transmission A method for achieving high quality shifts with one hydraulic unit near zero displacement when using dog clutches. This method includes selecting the proper displacement and vocation (whether the hydrostatic unit works as a pump or motor) of a low displacement hydra... | 04/08/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7310943 | Hydrostatic transmission controls with alternative operating modes A hydrostatic transmission on a tractor is operated by a microcontroller providing current commands to the hydrostatic transmission pump, and manual controls that provide signals to the microcontroller so the current commands cause the hydrostatic transmission to op... | 12/25/2007 |
| 7269491 | Cross-checking processors for powertrain control systems using a dedicated serial data link An engine management system for a vehicle includes engine and transmission control modules that are connected to a serial vehicle data bus. A dedicated serial data bus is connected to the transmission control module and the engine control module. The engine and the ... | 09/11/2007 |
| 7252020 | Vehicle drive-train including a clutchless transmission, and method of operation A vehicle drive-train includes a drive-motor having an output shaft and a transmission having an input shaft, an output shaft, a plurality of discrete forward gear ratios and a corresponding plurality of synchronizers. Each of the synchronizers is configured to mech... | 08/07/2007 |
| 7228762 | Traveling gear for agricultural working machine A method of regulating a travelling speed of an agricultural machine includes providing a diesel engine to drive a variable displacement pump, the variable displacement pump connected by a hydraulic line to at least one hydraulic motor connected to a running gear so... | 06/12/2007 |
| 7194348 | High acceleration time shift control apparatus and control method for vehicle A high acceleration time shift control apparatus and method for a vehicle is provided. The high acceleration time shift control apparatus includes a transmission which achieves plural shift speeds whose gear ratios are different from each other; and a high accelerat... | 03/20/2007 |
| 7165638 | Hybrid drive system wherein clutch is engaged when engine speed has exceeded motor speed upon switching from motor drive mode to engine drive mode A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output... | 01/23/2007 |
| 7143016 | System and method for dynamic multi-objective optimization of pumping system operation and diagnostics Control systems and methodologies are disclosed for controlling a process having one or more motorized pumps and an associated motor drives, which comprise selecting a desired operating point within an allowable range of operation about a process setpoint according ... | 11/28/2006 |
| 7111699 | Engine governor system A governor system for limiting the ground speed of a vehicle and maintaining an idle speed of the engine. The governor system includes a first feedback shaft operably coupled with a transmission of the vehicle to provide a first feedback torque in response to a grou... | 09/26/2006 |
| 7077773 | Drive assembly with dynamic tensioning device A drive assembly for a closed loop cable system in which a flexible driver member drives a door or the like back and forth has the flexible drive member wrapped around and driven by a drive pulley. The drive assembly includes a motor unit having a motor shaft that r... | 07/18/2006 |
| 7069767 | Method of determining initial transmission calibration A process for learning the pressure and volume characteristics for a given torque-transmitting mechanism is established on the final assembly line wherein a powertrain incorporating the desired transmission learning is installed within a vehicle. During the test pro... | 07/04/2006 |
| 7043347 | Hydraulic clutch control of vehicle power train A hydraulic clutch transmits driving torque in a power train of a vehicle. An oil pressure supply unit supplies oil pressure for engagement to the clutch and a controller controls the unit. The controller causes the unit, prior to engagement of the clutch, to precha... | 05/09/2006 |
| 6978201 | Model based kickdown shift method for clutch to clutch shift transmissions with accumulators A transmission control method improves shift feel during kickdown shifts. The release clutch is fully released at the initiation of the kickdown shift. The release clutch is then reapplied when the volume of the release clutch reaches a threshold capacity. The volum... | 12/20/2005 |
| 6969339 | Control equipment for a vehicle and control method thereof A control device for a vehicle which has a function to reduce the change-speed shock when changing the speed by controlling the transmission of the vehicle. The control device performs the switching between a manual change-speed mode in which the vehicle speed can b... | 11/29/2005 |
| 6952981 | Hydrodynamic 2-speed hydraulic drive A hydrodynamic 2-speed turbine drive, in particular, a turbine drive for application in under-floor or low-floor drive systems on rail vehicles, with two hydrodynamic components for the formation of two tractive-work circuits for two different speed ranges. A first ... | 10/11/2005 |
| 6938719 | Speed control system for wheeled hydraulic traveling vehicle Control valves are respectively provided in a pair of variable displacement hydraulic pumps. If an ultra low speed travel signal is issued in response to an ultra-low-speed switch turned on, one of the control valves is fixed to a neutral position by a solenoid valv... | 09/06/2005 |
| 6931924 | Method for testing the function of an electrohydraulically controlled automatic transmission The method for testing the function of an electrohydraulically controlled automatic transmission upon a testing stand by simulation of a vehicle operation provides that the output shaft of the transmission be connected with a stationary torque-measuring hub and be b... | 08/23/2005 |
| 6911743 | Aerogenerator having a fluid transmission and a gear transmission An aerogenerator is provided wherein a fluid-driven transmission and a gear-driven transmission are arranged between a propeller and a generator. The fluid-driven transmission has a variable hydraulic pump and a variable hydraulic motor. The fluid-driven transmissio... | 06/28/2005 |
| 6810772 | Automatic transmission 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 accelera... | 11/02/2004 |
| 6711486 | Drive unit for a motor vehicle and method of identifying the engagement position of an automatic clutch being part of the drive unit Drive unit for motor vehicles, comprising an engine and an automated friction clutch arranged between the engine and its gearbox, the engagement and disengagement of the clutch being controlled by a servo unit, which is controlled by a control computer to which, fro... | 03/23/2004 |
| 6655233 | Speed control for a utility vehicle 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 pro... | 12/02/2003 |
| 6622594 | Apparatus for controlling a plurality of hydraulic motors and clutch An apparatus for controlling a plurality of hydraulic motors and a clutch is capable of reliably implementing a sequence for engaging and disengaging the clutch and for fixing and clearing a zero tilt rotation amounts of the hydraulic motors, thereby prev... | 09/23/2003 |
| 6483197 | Drive system, electric machine for use in a drive system, and method for operating an electric machine in a drive system The invention concerns a drive system with a drive motor (1), especially an internal combustion engine of a motor vehicle, and a drive train (27); an electric machine (26), which can apply a braking and/or driving torque to the drive motor (1) and/or driv... | 11/19/2002 |
| 6470771 | Transmission system A transmission system including an automatic transmission having a plurality of speed change modes, including at least a continuously variable speed change node and a steeping speed change mode, and a sub-transmission connected to the automatic transmissi... | 10/29/2002 |
| 6457382 | Method and apparatus for shifting ranges in a torque reversing mechanical transmission coupled to a hydrostatic transmission A transmission assembly having a variable displacement hydraulic device which controls a ratio of an input speed to an output speed of the hydrostatic transmission is disclosed. The transmission assembly further includes a torque reversing mechanical tran... | 10/01/2002 |
| 6272950 | Drive train for a vehicle and method of controlling a drive train A drive train comprises an internal combustion engine, a clutchless gearbox, which can be shifted by means of an electronic control unit and by means of actuating devices, without a mechanical synchronizing device, and a hydrostatic gearbox with a hydraul... | 08/14/2001 |
| 6250180 | Hydromechanical traveling mechanism A traveling mechanism having a driving motor (24) which drives a feed pump (25) and a hydrostatic variable displacement pump (2), a zero fluctuating hydrostatic variable displacement motor (1) which forms with the hydrostatic variable displacement pump (2... | 06/26/2001 |
| 6216074 | Method for determining the fill time of a transmission clutch A method for controlling the fill time of an oncoming transmission clutch of a vehicle within a predetermined range of speed conditions is disclosed, the method including the steps of: (a) sensing an engine speed within the predetermined range; (b) readin... | 04/10/2001 |
| 6145409 | Hybrid gearbox A hybrid gearbox for land vehicles and automotive machines is designed such that the starting up and maneuvering operations of the vehicles are powered by a hydromotor and their normal travel is powered by a direct coupling with an internal combustion eng... | 11/14/2000 |
| 6087945 | Pump failure alarm system for hydraulic working machine A pump failure alarm system which is provided in a hydraulic working machine comprising hydraulic pumps driven by a prime mover, delivery lines joining with one another into one common delivery line on the downstream side, check valves provided in the del... | 07/11/2000 |
| 6080074 | Process for precise adjustment of a hydrostatic and mechanical torque division gearing A hydrostatic/mechanical multiple path power transmission comprises an adjustable hydrostat unit (4), a summing planetary gearbox (10) with two input shafts (6, 8) and at least two output shafts, and a step gearbox (11) connected to the output shafts. In ... | 06/27/2000 |
| 6067878 | System and method for restricting gear shift operation in timber harvesting tractors A system for automatically preventing gear shift operation in a timber harvesting tractor when the tractor is moving. The system includes a drive train powered by a transmission. The drive train includes a transfer case which is shifted by the operator of... | 05/30/2000 |
| 6026941 | Hydrokinetic torque converter The rotary housing of a hydrokinetic torque converter, which can be utilized in the power train of a motor vehicle--for example, in conjunction with a continuously variable transmission--contains a torque monitoring device which is installed in such a way... | 02/22/2000 |
| 5970821 | Control system for automatic transmission for vehicle It is an object of the present invention to provide a control system for an automatic transmission, which operates so that when slipping of drive wheels is generated at the starting of a vehicle on ice or the like, upshifting from a second gear shift stag... | 10/26/1999 |
| 5737979 | Method of calibrating clutches in a transmission Clutches in multi-speed transmission have been initially calibrated in an attempt to determine the point at which the clutch is filled and thus reduce the harshness of engagement of the elements within the clutches during future gear ratio changes in the ... | 04/14/1998 |
| 5700226 | Hydraulic lubrication control system for an automatic transmission A sharp-edged orifice, located in an hydraulic circuit between a lubrication system and a source of lubrication, is connected to a flow control valve, which balances the differential pressure across the orifice and throttles the source of fluid pressure t... | 12/23/1997 |
| 5678462 | Hydrostatic travelling drive The invention relates to a hydrostatic travelling drive for a vehicle, having a primary-adjustable and secondary-adjustable hydrostatic driving gear, which comprises at least two hydraulic machines in the form of a hydraulic pump drivable by a drive motor... | 10/21/1997 |
| 5679085 | Vehicle propulsion unit and method for controlling same A propulsion unit, preferably a propulsion unit for a utility vehicle, as well as a method for controlling same are disclosed. The propulsion unit comprises an engine, a transmission and a power take-off unit having a power take-off shaft. A first fractio... | 10/21/1997 |
| 5678463 | Process for the global control of a drive unit for a gearbox operated by a hydrostatic system A process for the global control of a drive unit for a gearbox operated by a hydrostatic system, for a vehicle equipped with at least two gears, comprising an appropriate sequence of steps, performed with preset timings, for activating and deactivating el... | 10/21/1997 |
