Patent application number | Description | Published |
20090012680 | Method for Optimizing the Operating Mode of a Hydrodynamic Component Integrated in a Drive Train of a Vehicle - A method for optimizing the operating mode of a hydrodynamic component integrated into a drive train of a vehicle, using a regulating or control device associated with the component. A set characteristic curve or a set characteristic diagram is stored in a memory unit for a hydrodynamic component; an actual value of at least one variable at least indirectly characterizing an operating point is determined for each transmission process; and the actual value is compared with the set value from the set characteristic diagram. If the actual value deviates from the set value, the manipulated variable for the operating point in question is modified and stored as a new set manipulated variable for said operating point. | 01-08-2009 |
20090113886 | HYDRODYNAMIC MACHINE - The present invention relates to a hydrodynamic machine, especially a hydrodynamic retarder, including a bladed primary wheel and a bladed secondary wheel which are arranged opposite of each other axially with respect to their blade configurations such that they jointly form a working chamber. The working chamber can be filled with a working medium for one operating state in order to transmit torque from the primary wheel to the secondary wheel by means of a circulatory flow of the working medium. The working chamber can be emptied of the working medium for a non-operating state in order to prevent a transmission of torque from the primary wheel to the secondary wheel. A suction apparatus is connected with a fluidic connection to the working chamber in order to suck off working medium and/or air from the working chamber for forming a negative pressure in the working chamber in the non-operating state. | 05-07-2009 |
20100147641 | COOLING SYSTEM WITH A DRIVE MOTOR AND A HYDRODYNAMIC MACHINE - A cooling system has a drive motor which is to be cooled by a cooling medium. A cooling medium circuit conducts the cooling medium. A hydrodynamic machine comprising a working space can be filled with a working medium. The working medium is the cooling medium, and the hydrodynamic machine has a seal which is cooled and/or lubricated by the cooling medium. A cooling medium pump for circulating the cooling medium is in the cooling medium circuit. A pick-off is in the cooling medium circuit in the region of the cooling medium pump. Via the pick-off, the cooling medium is branched out of the cooling medium circuit. The branched-off cooling medium is conducted directly through or past the seal to cool and/or lubricate the latter, and the cooling medium which is conducted through or past the seal is supplied to the cooling medium circuit upstream or downstream of the working space. | 06-17-2010 |
Patent application number | Description | Published |
20120012185 | HYDRODYNAMIC MACHINE AND METHOD FOR MINIMIZING THE DRAG POWER OF SUCH A MACHINE - The invention relates to a hydrodynamic machine, in particular a retarder, having an external working medium circuit, comprising: a bladed primary wheel and a bladed secondary wheel which together form a toroidal working chamber which can be filled with working medium from the external working medium circuit, which is fed back into the external working medium circuit; an annular channel disposed outside the working chamber, which is connected in a working-medium conducting manner to the working chamber via outlet holes in the primary wheel or secondary wheel, and is in flow-conducting communication with the external working medium circuit in order to collect working medium leaving the working chamber through the outlet holes and supply this to the external working medium circuit. The invention is characterised by the following features: having at least one tapping opening disposed on or outside the working chamber which is in flow-conducting communication with the working chamber of the hydrodynamic machine and at least one filling channel which opens into a region of relatively low working medium pressure inside the hydrodynamic machine and which is in flow-conducting communication with the working chamber; wherein the at least one tapping opening and the filling channel are interconnected in a working-medium conducting manner by means of a return line outside the external working medium circuit in such a manner that working medium flows from the at least one tapping opening into the filling channel and from there back into the working chamber. | 01-19-2012 |
20120097268 | FILLING CONTROL DEVICE FOR A HYDRODYNAMIC MACHINE - The invention concerns a filling control device of a hydrodynamic machine having two inlets and two outlets as well as two valve bodies. The two valve bodies can be shifted by means of a piston rod, to control the flow of working medium in the inlets and outlets as an open or closed-loop. The invention is characterised in that that the first valve body is connected elastically on the piston rod and that a stationary stop is provided for the first valve body, against which the first valve body strikes when the second valve body is further shifted by means of the piston rod. | 04-26-2012 |
20120222633 | COOLING SYSTEM, IN PARTICULAR OF A MOTOR VEHICLE - The invention concerns a cooling system, in particular a motor vehicle cooling system comprising
| 09-06-2012 |
20130205925 | Drive Train Having a Hydrodynamic Retarder and Method for Adjusting the Braking Torque - The invention relates to a drive train, especially a motor vehicle
| 08-15-2013 |
20130225365 | DRIVE TRAIN HAVING A HYDRODYNAMIC RETARDER - The invention concerns a drive train, in particular of a motor vehicle fitted with a drive motor, including a main output shaft; having a transmission connected downstream of the drive motor in the drive power flow, comprising a transmission input shaft and a transmission housing; the transmission input shaft is connected to and actuated by the main output shaft of the drive motor or can be switched into such connection by means of a coupling; having a hydrodynamic retarder, comprising a driven bladed primary wheel and a stationary bladed secondary wheel or which is driven in reverse direction of the primary wheel, whereas both wheels form together a frusto-conical work space which is filled or can be filled with working medium, for hydrodynamic transmission of torque from the primary wheel to the secondary wheel;
| 08-29-2013 |
20140081528 | Method of Controlling a Vehicle Drive Train with a Hydrodynamic Retarder - The invention concerns a method for controlling a vehicle drive train with a hydrodynamic retarder which can be engaged and disengaged mechanically via a coupling, whereas the retarder comprises a working chamber formed between two bladed wheels, which is filled with a working fluid for generating a braking torque after detecting a retarder switch-on signal and is emptied of the working medium after detecting a retarder switch-off signal to turn off the braking torque, and the retarder is driven in braking mode by means of a drive shaft via the closed coupling to constitute a hydrodynamic circuit of the working fluid in the working chamber. | 03-20-2014 |
20140113759 | Drive Train Having a Hydrodynamic Retarder and Its Control Method - The invention concerns a drive train
| 04-24-2014 |
20140131153 | Hydrodynamic Retarder and Method for Controlling the Power Transmission of Such a Retarder - The invention concerns a method for controlling the power transmission of a hydrodynamic retarder, comprising a rotating bladed rotor and a bladed stator or a bladed counter-rotor rotating against the direction of rotation of the rotor, which form together a working chamber which selectively can be filled with a working medium via an inlet and can be drained via an outlet; whereas the working chamber is filled with a working medium in braking mode, and a braking torque is generated with the hydrodynamic retarder and in a non-braking mode the working chamber is emptied of working medium down to a certain residual amount and substantially no braking torque is generated with the hydrodynamic retarder. The invention is characterised by the following step: In non-braking mode, working medium is injected into the working chamber of the hydrodynamic retarder for adjusting the residual amount, said working medium being extracted from a stock of working medium, which is provided outside the working chamber in a working medium storage tank using an idle pump. | 05-15-2014 |
20140151176 | Method for Controlling a Hydrodynamic Retarder which can be Disengaged Mechanically Via a Separating Clutch - The invention concerns a method for controlling a hydrodynamic retarder which can be disengaged mechanically via a separating clutch in a motor vehicle, which comprises a rotating bladed rotor and a bladed stator or a rotating bladed rotor and a bladed counter-rotor rotating in opposite direction thereto, which together form a working chamber filled with working medium in braking operation and emptied of working medium in non-braking operation, wherein the rotor is driven in braking operation via a drive train with a closed separating clutch and the working chamber is emptied when passing from the braking operation to the non-braking operation, wherein the transition from the braking operation to the non-braking operation is initiated via a retarder switch-off request of a driver assistance system or via actuation of an input device by the vehicle driver. | 06-05-2014 |
20140182983 | Disconnectable Hydrodynamic Retarder and Method for Controlling Same - The invention concerns a hydrodynamic retarder | 07-03-2014 |
20140311840 | Hydrodynamic Retarder and Method for Actuating Same - The invention relates to a hydrodynamic retarder comprising a rotor that revolves in a decelerating mode and a counter-rotating twin rotor or a stationary stator which jointly from a working chamber that is or can be filled with a working medium. The rotor can be driven using driving power via a drive train in order to decelerate the drive train. The invention is characterized in that an energy storage device is associated with or integrated into the retarder, said energy storage device comprising a mechanical energy store, pressure accumulator or kinetic energy store as well as an acceleration mechanism that is connected to the rotor, said acceleration mechanism being linked to the energy store and the rotor or being integrated into the rotor in order to convert energy stored in the energy store into an angular acceleration of the rotor. | 10-23-2014 |
20140330495 | MOTOR VEHICLE DRIVE TRAIN COMPRISING A HYDRODYNAMIC RETARDER THAT CAN BE DISENGAGED, AND CONTROL METHOD THEREFOR - The invention relates to a motor vehicle drive train including a hydrodynamic retarder that comprises a revolving bladed impeller and a stationary or counter-rotating bladed turbine which jointly form a working chamber that can be filled with a working medium to switch on the retarder. The hydrodynamic retarder can be mechanically disengaged from the drive train by a disconnect clutch. The invention is characterized in that a fill level monitoring device detects the current fill level of the working medium in the working chamber, while a disconnect clutch-blocking device is effectively connected in a communicating or mechanical manner to the fill level monitoring device and prevents the disconnect clutch from engaging in accordance with the detected fill level. | 11-06-2014 |
20150075929 | Hydrodynamic Retarder - The invention relates to a hydrodynamic retarder, comprising
| 03-19-2015 |