| Patent application number | Description | Published |
|---|
| 20080234099 | Control Valve Assembly for Controlling a Starting Clutch of an Automatic Transmission - The invention involves a control valve arrangement to activate at least one start-up clutch of a motor vehicle automatic transmission with at least one clutch control valve ( | 09-25-2008 |
| 20080234100 | Control Valve Arrangement for Controlling a Starting Clutch of an Automatic Transmission - A control valve arrangement having a clutch regulation valve ( | 09-25-2008 |
| 20090107136 | ELECTROHYDRAULIC TRANSMISSION CONTROLLER, TRANSMISSION DEVICE, AND A MOTOR VEHICLE DRIVE TRAIN - An electrohydraulic transmission controller ( | 04-30-2009 |
| 20090111636 | ELECTROYHYDRAULIC CONTROL DEVICE OF A GEAR UNIT - An electrohydraulic control device ( | 04-30-2009 |
| 20090215587 | Gear control device - An automatic transmission control device with a hydraulic control system controlled by an electric transmission control device. The system including several pressure control valves, actuated electrically by the transmission control device, and several switching valves and pressure regulation valves, actuated by hydraulic pilot pressure, which is adjustable with the pressure control valves. Each shift element is associated with one of the pressure control valve. An engagement prevention valve is actuated by one of a control pressure of the first shift element and a pressure signal equivalent to the control pressure of the first shift element to engage the reverse drive gear. A pressure supply line of the second shift element for obtaining the reversing gear is blocked when the engagement prevention valve is in its first switch position and open when the engagement prevention valve is in its second switch position. | 08-27-2009 |
| 20100042302 | METHOD FOR THE EMERGENCY ACTUATION OF AN AUTOMATED DOUBLE CLUTCH TRANSMISSION OF A MOTOR VEHICLE - A method for emergency actuation of an automated dual-clutch transmission of a vehicle with electrohydraulic control via a transmission control device. The method includes disengaging one clutch of the dual-clutch transmission, in order to realize emergency operation of the transmission and applying pressure on the other clutch after an error signal is transmitted indicating a malfunction of the transmission and/or the transmission control device. In order to keep the complexity of the hardware of the hydraulic system low, both clutches are disengaged, when an error signal occurs, and adjusted to a safe initial state, and an actuating pressure is only re-applied to one of the two clutches after the initial state is reached. In addition to the already existing elements of the hydraulic system, only one device or software is required which detects and selects the clutch that is more advantageous for continued driving operation. | 02-18-2010 |
| 20100093490 | DEVICE FOR THE CONTROL AT LEAST OF A HYDRAULICALLY OPERABLE SWITCHING ELEMENT OF AN AUTOMATIC TRANSMISSION - A device for controlling a hydraulically operable switching element ( | 04-15-2010 |
| 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 |
| 20100243079 | PRESSURE LIMITING VALVE AND ARRANGEMENT OF A PRESSURE LIMITING VALVE FOR THE PILOT CONTROL OF A PRESSURE CONTROL VALVE - An arrangement of a pressure limiting valve ( | 09-30-2010 |
| 20100326543 | PRESSURE CONTROL VALVE - A pressure control valve for at least one of controlling and/or regulating a pressure level in a hydraulic circuit. The control valve comprises a valve housing ( | 12-30-2010 |
| 20110027105 | OIL PUMP FOR AN AUTOMATIC TRANSMISSION AND CONTROL METHOD THERETO - A transmission oil pump for an automatic transmission of a motor vehicle. The speed of the oil pump can be shifted by a transmission ( | 02-03-2011 |
| 20110138957 | ACTUATING DEVICE FOR A SHIFT ELEMENT OF A TRANSMISSION DEVICE WHICH CAN BE APPLIED WITH AN ACTUATING PRESSURE - An actuating device for a shift element of a transmission which is acted upon by a hydraulic actuating pressure (p_B | 06-16-2011 |
