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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8070651 | Work machine coast and brake control with an infinitely variable transmission A work machine includes an IC engine having an output, an IVT having an input coupled with the IC engine output, and a ground speed actuator. A desired speed sensor associated with the ground speed actuator provides an output signal indicating a slower ground speed.... | 12/06/2011 |
| 8007403 | Work vehicle having hydraulic stepless speed changing apparatus A work vehicle includes a hydraulic stepless speed changing apparatus and a gear type speed changing apparatus operable to receive output from the hydraulic stepless speed changing apparatus to convert it into a plurality of stages of speed. A return oil passage con... | 08/30/2011 |
| 7811199 | Method for the operation of a drivetrain A method for operating a multi-speed automatic transmission of a motor vehicle. The automatic transmission has multiple shift elements for transmitting torque and/or power. When in forward and reverse gears, a first number of shift elements are engaged, and a second... | 10/12/2010 |
| 7416513 | Variable resolution single lever speed control for a hydrostatic transmission The invention refers to a self-propelled working machine comprising ground engaging means that are in drive connection with an engine for propelling the working machine, a desired speed input means having a range of movement for inputting a desired speed, a control ... | 08/26/2008 |
| 7390282 | Directional shift in hydrostatic drive work machine A method of performing a directional shifting event in a hydrostatic drive work machine, and a hydrostatic drive work machine is provided. The method includes the step of adjusting a pump displacement of a variable displacement pump coupled with an engine and a hydr... | 06/24/2008 |
| 7356398 | Synchronous shift control in an electrically variable transmission Synchronous shift control in a multi-mode, hybrid transmission utilizes motor torques to control clutch synchronizations and torque conditions thereacross for substantially torque disturbance free shifting from one mode to another. ... | 04/08/2008 |
| 7347117 | Hydraulic linear drive of a transmission actuator A hydraulic linear drive for a hydraulic vehicle transmission actuator has a piston/cylinder unit in which an adjusting piston is arranged so it is longitudinally displaceable in a cylinder housing and subdivides the cylinder space into at least two pressure spaces ... | 03/25/2008 |
| 7344473 | Hydraulic transmission vehicle A hydraulic transmission (21) has an electric actuator (86) for changing its output/input rotation speed ratio. A controller (90) of the actuator memorizes a command current value to the actuator supposing that load is not applied on the hydraul... | 03/18/2008 |
| 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 |
| 7303505 | Method for controlling rate of change of ratio in a continuously variable transmission A method for controlling a rate of change of speed ratios in a continuously variable transmission (CVT) includes sensing a vehicle speed, sensing an engine speed, and sensing a change in a position of an accelerator pedal. The method includes determining a desired e... | 12/04/2007 |
| 7288046 | Torque converter slip control for multi-displacement engine Prior to transitioning a multiple-displacement engine from a full-displacement engine operating mode to a partial-displacement engine operating mode, a base slip rate of a torque converter coupled to the engine engine is increased by a predetermined slip rate offset... | 10/30/2007 |
| 7280899 | S-type smooth command generating method and means thereof An S-type smooth command generating method and the means thereof are provided to process the motion commands smoothly, thereby generating continuous velocity commands and position commands. The provided method not only improves the motor's ability of acceleration/de... | 10/09/2007 |
| 7276016 | Speed control method for working vehicle A working vehicle in which while an operation degree of a speed change operation member is increased from 0 to a certain value, the increase of the vehicle traveling speed is produced by a first increase rate of an engine rotation speed and a first increase rate of ... | 10/02/2007 |
| 7259471 | Drive line for fluid flow power engine with speed guidance, power impact reduction and short-term energy storage Control procedure for a flow machine, wherein the flow machine comprises a turbine, which picks up power from a wind or water current, and a driveline, which transfers power from the turbine to an electric generator connected to an electricity grid of constant grid ... | 08/21/2007 |
| 7247122 | Downshift in hydrostatic drive work machine The present disclosure provides a hydrostatic drive work machine, and a method and control module having a control algorithm for performing a downshifting event in the work machine. The method includes the step of inducing a retarded mode in the work machine, if upo... | 07/24/2007 |
| 7216025 | Adaptive pressure control method for synchronous downshifts in a multiple-ratio transmission An adaptive pressure control method for synchronous downshifts in an automatic transmission that uses pressure actuated friction elements. The method uses characteristic parameters that determine downshift quality for both power-on downshifts and power-off downshift... | 05/08/2007 |
| 7189185 | Method for operating a drive train in a motor vehicle In a method for operating a drive train for a motor vehicle including a transmission with a hydraulic torque converter having a converter lockup clutch which can be activated by a working pressure acting on a piston under engine overrun conditions when an increased ... | 03/13/2007 |
| 7177729 | Meter for vehicle A meter for a vehicle has a transmission display part for displaying the gear position of a transmission and a driving mode, a speed display part for displaying vehicle speed, and a drive distance display part for displaying drive distance. A display area for select... | 02/13/2007 |
| 7107135 | Auxiliary gearset shift progression command generator for a swap-shift automatic transmission A target command generator for use in a control system for an automatic transmission having a simple planetary gearset in series with a multiple-ratio gearset, the target command generator providing input for a controller for the simple planetary gearset to achieve ... | 09/12/2006 |
| 7105938 | Electronically controlled engine generator set An electronically controlled electrical power generator comprises a generator driven by a heat engine, operated by control means, and carrying an electrical load. Operation of the heat engine is at wide open throttle. Control over engine operation and electrical out... | 09/12/2006 |
| 7074144 | Hydraulic control apparatus for vehicle with belt-drive continuously variable transmission Hydraulic control apparatus includes a belt-drive CVT, a pressure regulator valve (P.REG.V) regulating the oil pressure produced by an oil pressure source, a controller programmed to develop a transmission control signal, a transmission actuator driven based on the ... | 07/11/2006 |
| 7047118 | Method and apparatus for regulating the transmission ratio of a continuously variable transmission A method and apparatus for regulating the transmission ratio of a continuously variable transmission. A set point value for adjusting the transmission ratio can be changed as a function of the operating parameters of a power train that includes the transmission. The... | 05/16/2006 |
| 7044887 | Shift control system for automatic transmission A shift control system for a vehicle automatic transmission includes a vehicle speed sensor for detecting a vehicle speed, and a first control means normally performs a shift control of the transmission so that a target speed ratio of the transmission is achieved, w... | 05/16/2006 |
| 7037236 | Hydraulic transmission vehicle A hydraulic transmission (21) has an electric actuator (86) for changing its output/input rotation speed ratio. A controller 90 of the actuator memorizes a command current value to the actuator supposing that load is not applied on the hydraulic... | 05/02/2006 |
| 7029421 | Method for operating an automatic gearbox on a motor vehicle A method is described for operating an automatic transmission in which a command for changing a current ratio of the automatic transmission is generated when achieving preset operating states of the vehicle automatically or by manual input in a manual shifting mode,... | 04/18/2006 |
| 7022044 | Drive train for powering a mobile vehicle To reduce the structural volume of a drive engine (1) in a drive train of a mobile vehicle, in particular a working machine such as a wheel loader, a continuously adjustable transmission gear is arranged between the drive engine (1) and a hydraulic pum... | 04/04/2006 |
| 6997837 | Shift control system of automatic transmission for vehicle and shift control method thereof In a shift control system of an automatic transmission for a vehicle, an engaging torque applied to a predetermined friction element that has been engaged to establish a predetermined gear stage of the automatic transmission during running of the vehicle is graduall... | 02/14/2006 |
| 6988571 | Crawler tractor The purpose of the invention is to enable a crawler tractor to brake and stop certainly without applying a load to an engine and a driving mechanism, and without complicated operation. An operation link links a conic linkage (53) which links a steering wheel ... | 01/24/2006 |
| 6950736 | Shift control method and apparatus of an automatic transmission In the case of malfunctioning of an inhibitor switch of an automatic transmission, a current vehicle speed is compared with a maximum vehicle speed of a reverse speed when the current vehicle speed is other than 0. The transmission is then controlled to a target shi... | 09/27/2005 |
| 6939261 | Compact vehicle transmission A small engine transmission having a hydromechanical transmission unit providing a first power path, and a mechanical power transmission unit providing a second power path. The mechanical power transmission is a planetary gear system having a planetary carrier. The ... | 09/06/2005 |
| 6926640 | Transmission control system of automatic transmission for vehicle A transmission control system, includes: 1) a high speed side friction element for establishing a high speed side change gear; and 2) a low speed side friction element for establishing a low speed side change gear. After a disengagement of the h... | 08/09/2005 |
| 6908412 | Control apparatus for continuously variable transmission When an operator takes his foot from an accelerator pedal, a returning speed of the accelerator pedal is calculated from a signal of an accelerator sensor. In case where the returning speed is larger than a reference value, it is judged that the operator intends to ... | 06/21/2005 |
| 6885929 | Control method for an automatic transmission of an engine-driven vehicle A control method for an automatic transmission in which a first and a second control system are provided and regulate the transmission ratio respectively in automatic and in manual mode. The method comprises the stages of activating the first control system and auto... | 04/26/2005 |
| 6849028 | Propelling transmission control apparatus for a working vehicle having a hydrostatic stepless transmission A propelling transmission control apparatus for a working vehicle having a hydrostatic stepless transmission comprises a variable displacement type hydraulic pump (35), a change speed control mechanism (80) for converting a displacement of a control de... | 02/01/2005 |
| 6839617 | Extension of operating range of feedback in CVT ratio control Operating range of feedback in CVT ratio control has been extended by use of stabilized values as an actual value of CVT ratio. The actual value of CVT ratio is derived from first and second pulse train signals provided by input and output speed sensors. Updating of... | 01/04/2005 |
| 6827667 | Select-shock control system and method for automotive automatic transmission The method for decreasing gear select shock comprises determining whether a vehicle is stopped and if idle conditions exist based on vehicle operating parameters. It is then determined whether the vehicle has been stopped for longer than a predetermined period. If i... | 12/07/2004 |
| 6723021 | Gear actuator for engaging and/or disengaging gears of a transmission A gear actuator for engaging and disengaging gears in an automatic manual transmission has a single working piston or two working pistons provided with a first working piston surface and a second working piston surface. An auxiliary piston is provided also. A pressu... | 04/20/2004 |
| 6712735 | Control apparatus for automatic transmission The invention eliminates the feeling of two-phase speed-change operations by causing a speed-change operation to proceed continuously when the speed-change operation is performed through two-phase control of engagement and release of four engagement elements. An aut... | 03/30/2004 |
| 6641502 | Apparatus for controlling a motor vehicle transmission A control device for a gear of a motor vehicle, where the control device adjusts the speeds or transmissions of a gear according to a control program. In order to improve the setting of options and parameters to influence the control program, it is propos... | 11/04/2003 |
| 6640177 | Method for determining a transmission ratio for an automatic transmission arranged in a drive train of a motor vehicle The invention relates to a method for determining a transmission ratio for an automatic transmission arranged in the drive train of a motor vehicle. Operating parameters of the vehicle and especially of equipment arranged in the drive train are made avail... | 10/28/2003 |
