| Patent application number | Description | Published |
|---|
| 20080217134 | Process for pressure actuation of a shifting element - The invention concerns a process for pressure actuation of a rotating shifting element of an automatic transmission or automated manual transmission, in which the shifting element is configured with a piston that interacts with a torque transfer element and a pressure medium supply, by way of which the piston can be actuated with pressure medium in order to be displaced into a positioned defined for an activated state of the shifting element, and in which a pressure pulse can be induced in the pressure medium supply in a de-activated state of the shifting element. It is proposed that the pressure medium pulse be triggered when the pressure medium amount drained from the de-activated shifting element has reached a predefined value. | 09-11-2008 |
| 20080293544 | PROCESS FOR ACTUATING A TRANSMISSION MECHANISM - A process for actuating a transmission mechanism having hydraulic shifting elements for changing gear ratios by using electric actuators to adjust the actuating pressures of the shifting elements. Upon a request from an engine start/stop function for shutdown of an engine, the flow of electrical current to the actuators is changed from an operating level to a standby level depending upon the operating pressure of the shifting elements. Upon the request for startup of the engine, the flow or electrical current is changed from the standby level to the operating level. A system pressure in the hydraulic system is zero when the engine is shutdown, and the power consumption in the transmission mechanism is lower at the standby level than the operating level. | 11-27-2008 |
| 20090111647 | METHOD FOR SELECTING A NEUTRAL POSITION OF A MOTOR VEHICLE TRANSMISSION AND FOR SELECTING A PARKING GEAR OF A MOTOR VEHICLE - The invention relates to a method to select a neutral position of an automatic or automated motor vehicle transmission and to select a parking gear provided to immobilize a motor vehicle, wherein the neutral position and parking device can be set or activated, depending on a gear selected by the driver of the motor vehicle on a selector device and depending on other operating parameters of the motor vehicle. In addition, the invention relates to a motor vehicle controlled by this method. | 04-30-2009 |
| 20090111648 | METHOD FOR AUTOMATICALLY CONTROLLING A NEUTRAL POSITION AND A PARKING LOCK OF A MOTOR VEHICLE TRANSMISSION - A method of automatically controlling a neutral position and parking lock of an motor-vehicle transmission to immobilize the vehicle depending on a drive position of the transmission selected by the driver with a selector device and subject to other operating parameters of the motor vehicle. Only when simultaneously the vehicle is essentially stationary, an ignition circuit is electrically interrupted and the selector device is in a “Neutral” position, can an Neutral-holding phase be activated, in which the transmission is in a non-frictionally engaged neutral position as long as the parking lock of the transmission has not yet been engaged. If the Neutral-holding phase has not been activated, the transmission remains non-frictionally connected in the Neutral position until the driver at least intends to exit the vehicle, at which time the parking lock of the transmission is automatically engaged. | 04-30-2009 |
| 20090111649 | METHOD FOR SELECTING A NEUTRAL POSITION OF A MOTOR VEHICLE TRANSMISSION AND FOR SELECTING A PARKING DEVICE OF THE MOTOR VEHICLE - A method for selecting a neutral position of an automatic or automated motor vehicle transmission and for selecting a parking device of the motor vehicle intended for immobilizing the motor vehicle, wherein the neutral position and the parking device can be engaged or actuated as a function of a position chosen by the driver of the motor vehicle on a selector device and as a function of other operating parameters of the motor vehicle. The invention further relates to a motor vehicle controlled by this method. | 04-30-2009 |
| 20090111654 | METHOD FOR THE AUTOMATIC CONTROL OF A NEUTRAL POSITION AND A PARKING LOCK OF A MOTOR VEHICLE TRANSMISSION - The invention concerns a method for the automatic control of a neutral position and a parking lock of an automatic or automated motor vehicle transmission, such that the neutral position and the parking lock of the transmission provided in order to immobilize the motor vehicle can be engaged as a function of a drive setting selected by the driver of the motor vehicle using a selector device, and as a function of other operating parameters of the vehicle. In addition, the invention concerns a motor vehicle controlled by the method. | 04-30-2009 |
| 20090112425 | Method for Operating an Automatic Gearbox - A method of operating an automatic transmission of a motor vehicle, in particular a variable-speed transmission. The automatic transmission includes at least five shift elements, at least three of which are engaged in a forward and a reverse gear to transfer torque or force. When disengaging gears for shifting the automatic transmission from a forward or reverse gear to a neutral position, at least one of the at least three shift elements that are engaged in the respective forward or reverse gear is completely disengaged. | 04-30-2009 |
| 20090176612 | Method for Operating an Automatic Gearbox - A method for operating an automatic transmission of a motor vehicle, in particular a variable-speed automatic transmission. The automatic transmission has five shift elements and for transferring torque or force in a forward gear and in a reverse gear at least three of the five shift elements are engaged. In a neutral position of the automatic transmission, to prevent torque or force flow at least one of the shift elements that are engaged in the respective forward or reverse gear is fully disengaged. | 07-09-2009 |
| 20090206292 | METHOD OF OPERATING A TRANSMISSION SYSTEM VALVE CONFIGURATION - The invention describes a method for operating a transmission's valve system of a vehicle's drive train through a valve unit and said valve unit's electro-magnetic activator configuration. In a transmission's hydraulic system and being part of the vehicle's drive train, its hydraulic pressure value (p_EDS) can be employed and adjusted through a valve unit's configuration by applying to the electro-magnetic activator system a pulse-width-modulated current signal (i_EDS). The pulse-width modulated current signal (i_EDS) and its signal's amplitude (A) and/or its pulse duration (pw | 08-20-2009 |
| 20090249777 | TRANSMISSION DEVICE WITH AT LEAST ONE FORM-FIT SHIFTING ELEMENT BEING HYDRAULICALLY ACTUATED VIA A HYDRAULIC SYSTEM - A transmission device ( | 10-08-2009 |
| 20090250310 | TRANSMISSION APPARATUS COMPRISING AT LEAST ONE POSITIVE SHIFTING ELEMENT HYDRAULICALLY ACTUATED BY WAY OF A HYDRAULIC SYSTEM - A transmission apparatus ( | 10-08-2009 |
| 20090280951 | METHOD FOR OPERATING A VEHICLE DRIVETRAIN - A method for operating a vehicle drivetrain ( | 11-12-2009 |
| 20100197456 | METHOD FOR ACTUATING A GEAR STEP IN AN AUTOMATIC OR AUTOMATED TRANSMISSION OF A MOTOR VEHICLE AND CORRESPONDING MOTOR VEHICLE - A method of actuating a gear step in an automatic or automated transmission of a motor vehicle. The gear step of the transmission and a parking lock, which immobilizes the vehicle, can be engaged as a function of a gear step (P, R, N, D) that can be selected by the driver via a controllable selector device, and as a function of other motor vehicle operating parameters. A separate operating device, which is in addition to the selector device, can activate a holding phase, in which the transmission is in a traction-free neutral position, independently of a predetermined gear step “Park” (P), “Reverse” (R), “Neutral” (N) and/or “Forward”’ (D) that is specified by the selector device, if the motor vehicle is at least almost at a standstill and at the same time, an ignition circuit acting on a drive motor of the motor vehicle is electrically interrupted. | 08-05-2010 |
| 20100204893 | PROCESS FOR MONITORING THE DIRECTION OF FRICTIONAL DRIVE FROM A VEHICLE TRANSMISSION AT NEAR-ZERO VEHICLE SPEED - A process of monitoring a drive direction of an automatic or automated vehicle transmission at near-zero vehicle speed via an engaged gear. A desired direction of drive of the transmission is determined from an engaged gear at the time the vehicle begins motion. An actual direction of drive is determined from the transmission and, if different from the desired direction of drive, an error signal is produced. The process includes determining the actual drive either from a sensed rotational direction of a transmission input shaft and a sensed rotational direction of a transmission output shaft or a sensed valve setting, a sensed pressure in an transmission electro-hydraulic control system or on a transmission shifting element or from a sensed direction of rotation of a transmission gearset element or from axial movement or force of a transmission constructional element. | 08-12-2010 |
| 20100312423 | METHOD AND DEVICE FOR CONTROLLING A PARALLEL HYBRID DRIVE-TRAIN OF A VEHICLE - An method for controlling a parallel hybrid drive-train of a vehicle comprising an automatic transmission and a combustion engine which is connected, via a first shifting device, to an electrical machine, which is connected, via a drive shaft, a starting clutch positioned in the transmission. To guarantee safety and high drive comfort of the vehicle during failure of the starting clutch, shifting failures of the starting clutch are monitored. If a shifting failure is recognized, predetermined contingency procedures are initiated and executed in which either continued drive of the vehicle or slowing down of the vehicle to a stop is possible. A device comprises a monitor with a sensor and parts for analyzing and recognizing shifting failures of the starting clutch. Control parts initiate and execute contingency procedures such that a continued drive operation or slowing down of the vehicle to a stop is possible. | 12-09-2010 |
| 20110087386 | METHOD FOR ACTUATING THE NEUTRAL POSITION IN AN AUTOMATIC OR AUTOMATED TRANSMISSION OF A MOTOR VEHICLE, AND CORRESPONDING MOTOR VEHICLE - A method for shifting an automatic or an automated transmission of a motor vehicle to a “neutral” position such that the shift position of the transmission and a parking lock, provided for keeping the motor vehicle stationary, are engaged as a function of a shift position selected with a driver operated selector device and as a function of other operating parameters of the motor vehicle. A holding phase, in which the transmission is in the neutral position, free from friction force locking, can be activated by a separate operating device which is provided, in addition to the selector device, but only when the motor vehicle is simultaneously at least approximately stationary, an ignition current circuit that acts on a drive engine of the motor vehicle is electrically interrupted, and the “neutral” (N) shift position is specified by a selector device. | 04-14-2011 |
