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| Number | Title | Issue Date |
| 7731630 | Calibration system for hydraulic transmission A calibration system for calibrating a transmission adjusts a clutch fill pulse width and hold level current for an oncoming clutch via calibration shifts during operation of the associated machine, thus establishing the desired shift timing and duration. The pulse ... | 06/08/2010 |
| 7393305 | Controller for automatic transmission In performing a down-shift based on a driver's intention of deceleration, an engine output increasing control is started at a time when a transfer torque capacity of the releasing clutch becomes small or zero and the actual oil pressure decreases to an initial oil p... | 07/01/2008 |
| 7353725 | Method of shifting gears in a work machine A method of shifting gears in a work machine includes modulating an oncoming clutch pressure via a first segment of a predetermined curve, and modulating the clutch pressure via a second segment of the predetermined curve after the occurrence of a predetermined rela... | 04/08/2008 |
| 7349767 | Method and system for intention estimation and operation assistance An intention estimation and operation assistance system for estimating an operator's intention and providing assistance to operation of a machine. Reference data, such as the operation of a plurality of hypothetical operators, is provided for comparison with the ope... | 03/25/2008 |
| 7306543 | Automatic transmission controller An automatic transmission controller has an electronic control circuit, an electromagnetic valve, and a pressure control valve. The electronic control circuit generates a control current. The electromagnetic valve regulates a command pressure in accordance with the ... | 12/11/2007 |
| 7282012 | Electronic adaptive swap-shift control for an automatic transmission for automotive vehicles A control system and control method for a swap-shift transmission having auxiliary and main gearsets wherein precise synchronization control of ratio changes of each gearset at the start and at the end of a swap-upshift progression is achieved using an adaptive cont... | 10/16/2007 |
| 7257522 | Simulator for automatic vehicle transmission controllers A simulator comprising computer-aided design programs for simulating a shift control algorithm stored in an ECU of an automatic transmission having hydraulic clutches. In the simulator, a simplified hydraulic model describes the entire system so as to design a third... | 08/14/2007 |
| 7244215 | Transmission control system and method A vehicle transmission transmits torque from an engine to a drive axle and includes a power shift transmission and a reverser module. A control system and method automatically partially disengages the reverser module during a shift of the power shift transmission wi... | 07/17/2007 |
| 7243016 | Single wire dual speed signal system A control system and method for communicating with a transmission includes a transmission input speed sensor that generates an input speed signal. A transmission output speed sensor generates an output speed signal. A power supply supplies a total current to the tra... | 07/10/2007 |
| 7234367 | Power take-off control system A control system and method for detecting variable load types and controlling the operation of a PTO clutch to effect engagement of the clutch with variable loads, and especially to more optimally effect the engagement of a clutch with a heavy load is disclosed. The... | 06/26/2007 |
| 7234366 | Power take-off control system A control system and method for detecting variable load types and controlling the operation of a PTO clutch to effect engagement of the clutch with variable loads, and especially to more optimally effect the engagement of a clutch with a very light load or an associ... | 06/26/2007 |
| 7198586 | Transmission having multiple ratio planetary gear unit in series with an auxiliary gear unit A multiple ratio transmission having a planetary primary gear unit producing forward ratios and a reverse ratio, and a planetary auxiliary gear unit in series with the primary gear unit producing a direct drive ratio and either an underdrive ratio or an overdrive ra... | 04/03/2007 |
| 7146264 | Method and system for controlling an automatic transmission using a GPS assist having a learn mode A method and system for controlling an automatic transmission is disclosed. The method and system include obtaining positioning data using a global positioning satellite (GPS) and monitoring the automatic transmission to obtain transmission data. The method and syst... | 12/05/2006 |
| 7130733 | Control method for an automatic transmission Control method for effecting a gear shift in a stepped automatic transmission with an input shaft and an output shaft for transmitting power between two inertia components at distinct speed ratios with a first power transmission path and a second power transmission ... | 10/31/2006 |
| 7048106 | Power take-off control system and method A PTO control system and method for engaging a PTO clutch of a vehicle or work machine such as, but not limited to, an agricultural tractor, that can effectively utilize both engine speed and PTO output speed values for determining a predicted and/or actual PTO load... | 05/23/2006 |
| 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 |
| 7029419 | Automatic transmission downshifts based on tire adhesion limits A shift control system that controls gear shifts in a vehicle includes a transmission and a controller. The controller detects driving conditions of the vehicle, estimates a traction load of the vehicle and determines a current traction load of the vehicle. The cont... | 04/18/2006 |
| 7027914 | Diagnostic coordination control An engine control system includes an ignition switch that selectively initiates an ignition signal and an operating mode of an engine. A powertrain relay selectively generates a PR load signal based on the ignition signal and the operating mode. A control module ena... | 04/11/2006 |
| 7008344 | Control apparatus for controlling a shift operation in an automatic transmission A control apparatus for controlling a shift operation in an automatic transmission includes a disengaging side controlling device for performing a feedback control so as to substantially match a slip amount calculated by a slip amount calculating device with a targe... | 03/07/2006 |
| 7004872 | Control method and device for automatic transmission A control method for an automatic transmission is capable of quickly determining whether gear shifting is permissive. The control method varies the command value input to an engaging-side electromagnetic valve that adjusts a hydraulic pressure applied to a frictiona... | 02/28/2006 |
| 7001299 | Control apparatus of automatic transmission According to an aspect of the present invention, an automatic transmission includes plural friction engaging elements configures plural shift ranges based on combinations of each friction engaging element being in engaging or disengaging condition, a controlling uni... | 02/21/2006 |
| 6994653 | Method and arrangement for controlling the internal combustion engine of a vehicle A method for controlling an internal combustion engine of a vehicle makes possible an acceleration of the shift operation especially of an automatic transmission or of an automated manually shifted transmission of the vehicle. In a shift operation, an operating stat... | 02/07/2006 |
| 6994647 | Adaptive pressure control method for achieving synchronous upshifts in a multiple-ratio transmission An adaptive shift control method for a geared multiple ratio transmission having friction elements for clutches and brakes to establish and disestablish gear ratio changes wherein at least one ratio change involves engagement of one friction element in synchronism w... | 02/07/2006 |
| 6969340 | Control apparatus and control method for automatic transmission A control apparatus and method for an automatic transmission, by which a shift is executed by simultaneously controlling release and application of different friction engaging elements, are provided which i) control a clamping force of a friction engaging element to... | 11/29/2005 |
| 6966862 | Shift control system of automatic transmission In a case of an electric failure caused to a traveling vehicle and when any of forward gears is held at a step S5, a comparison is made between: 1) a supposedly-engaged friction element of friction elements which is supposed to be engaged at the any of the fo... | 11/22/2005 |
| 6962552 | Vehicle shift control device and control method therefor A duty ratio for controlling an engagement force of a friction engagement device on the side of upshift engagement is corrected by an amount corresponding to an intermediate correction control value in the course of the shift. In addition, on a prerequisite conditio... | 11/08/2005 |
| 6944529 | Automatic fluid draining from a hydraulic system component of an automatic transmission In a hydraulic system for an automatic transmission, a method for automatically draining fluid from an oil cooler and related hydraulic lines when power is off to prevent fluid leakage, escape and outflow when they are disconnected from the system. A control system ... | 09/13/2005 |
| 6915890 | Learning method for oncoming clutch fill level and volume A method for adaptively learning clutch volumes and fill level to compensate for build tolerances and clutch wear includes increasing a fill level of a clutch during an oncoming fill phase of a clutch to clutch transmission. A state of a regulator valve of the clutc... | 07/12/2005 |
| 6893379 | Hydraulic pressure control apparatus for vehicular automatic transmission and control method for hydraulic frictional engagement device of vehicular automatic transmission When it has been determined that control for a predetermined upshift has been started while an accelerator pedal was not being depressed, and that a factor that changes an input torque of an automatic transmission has been generated, an engaging pressure of a predet... | 05/17/2005 |
| 6871131 | Transmission systems A method of changing gear in an automated transmission system of a motor vehicle having a multi-ratio gearbox with an input shaft and an output shaft, a take-up clutch located between the input shaft and an output shaft of an engine, a number of pairs of intermeshin... | 03/22/2005 |
| 6726589 | Apparatus and method for controlling oil pressure of an automatic transmission When a different speed change request occurs during pre-charging, an indicated pressure is stepwise changed up to a standby pressure for after pre-charge, and a processing in accordance with the different speed change request is commenced with the indicated pressure... | 04/27/2004 |
| 6718247 | Control method and system for an infinitely variable automatic automobile transmission In the method, the transmission ratio of the speed transmission (i_act) is set automatically using stored adjustment characteristic curves, as a function of a variable (FP, tv) which characterizes the engine output, and a variable (v) which characterizes the vehicle... | 04/06/2004 |
| 6623404 | Reshift control system for automatic transmission When a reshift request for a second shift to a second gear ratio is produced during a first shift operation to a first gear ratio in an automatic transmission, a reshift control apparatus performs a reshift operation in response to the reshift request in ... | 09/23/2003 |
| 6616576 | Apparatus and method for controlling gear shift for automatic transmission In gear shift controlling method and apparatus for an automatic transmission, the automatic transmission comprising a plurality of frictional elements, a working liquid pressure for each of first and second frictional elements is controlled to make a gear... | 09/09/2003 |
| 6580993 | Process for adapting automatic transmission shiftings Described is a process for the adaption of the shifting operation of an automatic transmission. Accordingly, a determination of adaption values is made relative to occurrences shifting quality in the operation of an automatic transmission, and said determ... | 06/17/2003 |
| 6560521 | Control device and control method for a vehicle At the time of the change-speed, by correcting the torque reducing portion of an output shaft during the change-speed, the revolution number of an input shaft is controlled on the basis of the corrected torque reduction correcting value. Also, the torque ... | 05/06/2003 |
| 6554742 | Modification of shifting characteristics based upon shifting direction and drive train load An apparatus and method for controlling a plurality of clutches in a powershift transmission. The transmission is coupled to an engine of an off-road vehicle. The method includes receiving a shift command having a shift direction. Clutch timing is selecte... | 04/29/2003 |
| 6537170 | Shift control system for automatic transmission A shift control system of an automatic transmission executes an interchange shift by interchanging engagement conditions of first and second friction elements of the automatic transmission. The first and second friction elements are engaged and disengaged... | 03/25/2003 |
| 6520882 | Shift control system for automatic transmission An automatic transmission controller carries out (a) changing a control for engaging the engaging-side frictional element between in a first condition in which a speed of progression in the shift is managed mainly in accordance with a volume of the hydrau... | 02/18/2003 |
| 6508742 | Procedure for improvement of the shifting speed Within the scope of the procedure for improvement of the shifting speed of automatic transmissions, at each gear shift at least one engaging or disengaging shifting element needed for the next gear shift in the same direction is prepared or lowered to shi... | 01/21/2003 |
