Patent application number | Description | Published |
20110297111 | SEALING FOR A REGULABLE COOLANT PUMP - A regulable coolant pump for a coolant circuit of an internal combustion engine, which has a pump housing and a hollow shaft that is placed in the housing and mounted on rolling bearings that connects a drive wheel to an impeller. As the impeller rotates, coolant is drawn in via an inlet chamber that is upstream from the cover disk and is delivered, via vanes of the impeller, into an annular channel of the pump housing. The volumetric delivery can be influenced through an axially displaceable baffle plate assigned to the impeller. The baffle plate is connected in a rotationally rigid manner to a push rod guided in the hollow shaft that acts together with an adjusting unit. A sealing element is provided to seal an annular gap that forms between the baffle plate and the cover disk. | 12-08-2011 |
20120076640 | SEAL FOR A CONTROLLABLE COOLANT PUMP - A controllable coolant pump which has a pump housing. In the pump housing a pump shaft is arranged, which connects a drive wheel to an impeller wheel. In the operating state of the coolant pump, during a rotation of the impeller wheel, coolant is sucked in via a cover disk which is mounted in front of a suction space, and is conveyed into an annular channel of the pump housing. A delivery volume of the coolant pump can be influenced via an actuator which interacts with an axially displaceable guide plate assigned to the impeller wheel. An elastic sealing element is provided for effective sealing of an annular gap which is produced in a functionally required manner between the impeller wheel and the guide plate. The sealing element is inserted in an annular groove of the impeller wheel and is supported sealingly on a cylindrical section of the guide plate. | 03-29-2012 |
20120111291 | DEVICE FOR REGULATING A COOLANT FLOW AND COOLING SYSTEM | 05-10-2012 |
20120291723 | ACTUATING MECHANISM FOR A REGULATED COOLANT PUMP - A regulatable coolant pump for a cooling circuit of an internal combustion engine having a pump housing with a hollow pump shaft with an impeller. Rotation of the impeller moves coolant. An axially displaceable guide disk on the impeller controls a pump displacement volume and works via an actuating mechanism. The guide disk is rigidly connected to a connecting rod guided in the pump shaft. The actuating mechanism includes a displacement pump integrated in the coolant pump, and an actuator formed as a piston-cylinder unit with a pressure chamber in the pump housing that has a circular annular shape positioned to coincide with an outer region of the guide disk. A piston that works together with the guide disk is guided in linearly displaceable fashion in the pressure chamber. A coolant flow of the displacement pump controlled by a control valve charges the pressure chamber to displace the piston. | 11-22-2012 |
20120291724 | ACTUATING MECHANISM TO REGULATE A CONTROLLABLE COOLANT PUMP - A controllable coolant pump, insertable in a coolant circuit of an internal combustion engine includes a pump housing, in which a hollow pump shaft is supported rotationally with an allocated impeller. Rotation of the impeller conveys coolant. To control a volume conveyed by the coolant pump an axially displaceable guide disk is provided, allocated to the impeller and cooperating with an actuating mechanism. The guide disk is connected to a push rod, guided in the pump shaft, and is displaceable between two end positions defined by a rear wall and a pump cover of the impeller. The actuating mechanism further includes a displacement pump integrated in the coolant pump, with a coolant flow of the displacement pump being supplied for adjustment of the guide disk via a control valve to an actuator, which includes a piston in a pressure chamber in the pump shaft connected to the push rod. | 11-22-2012 |
20130309103 | ACTUATOR SYSTEM FOR A CONTROLLED COOLANT PUMP - A coolant pump of an internal combustion engine, with a pump housing and a hollow shaft rotatably mounted therein. Coolant is delivered via an impeller wheel from a suction connection. The flow is controlled by a guide plate on the impeller wheel that is variably displaceable axially between two end positions. The guide plate is adjustable by a push rod actuator guided in the pump shaft. The actuator has a radial piston pump integrated within the coolant pump with an intake piston and a counterpiston guided in the pump shaft, that are inserted lying opposite one another and delimit a pressure space. The pistons are enclosed outside by a linearly displaceable control element guided in the pump housing. Adjustment of the control element takes place as a function of a rotary angle of the pump shaft via an actuator unit having an electrically operated actuating element and a linear freewheel. | 11-21-2013 |
20140003913 | INFINITELY ADJUSTABLE COOLANT PUMP | 01-02-2014 |
20140308115 | CONTROLLABLE COOLANT PUMP WITH AN ELECTRO-HYDRAULIC BAFFLE PLATE ADJUSTMENT - A controllable coolant pump of a cooling circuit for an internal combustion engine, having a pump housing, in which a pump shaft with associated impeller is rotatably arranged. The impeller conveys a coolant as a volume flow via an intake connection in a pressure or spiral channel of the coolant pump. The volume flow can be influenced by a baffle plate which encloses the outside of the impeller, the push rod of the baffle plate being guided in the pump shaft. In connection with an actuator the baffle plate can be continuously adjusted between two limit positions against the force of a spring. A control element, which has an electro-hydraulic action and which is integrated into the pump shaft, serves as an actuator, wherein the pressurized coolant in the coolant pump is provided as a hydraulic fluid. | 10-16-2014 |