| Patent application number | Description | Published |
|---|
| 20090096324 | PIEZOACTUATOR, METHOD FOR PRODUCING A PIEZOACTUATOR AND INJECTION SYSTEM OF SAID PIEZOACTUATOR - A piezoactuator for injecting fuel with a predetermined fuel pressure has an at least laterally narrowing casing around the internal space of the actuator which has a first temperature- and/or pressure-dependent volume change, a piezo stack located in the internal space which has a second temperature- and/or pressure-dependent volume change, a transmission element which is located between the piezo stack and the casing for transmitting the fuel pressure on the outside of the casing onto the piezo stack, wherein the transmission element has a passivating liquid which has a third temperature- and/or pressure-dependent volume change as well as several preformed bodies which have a fourth temperature- and/or pressure-dependent volume change; wherein the relation between the passivating liquid and the preformed bodies is set that the first volume change of the casing basically corresponds to an overall internal space volume change which has at least the second, third, and fourth volume change. | 04-16-2009 |
| 20090200406 | INJECTION SYSTEM AND METHOD FOR PRODUCING AN INJECTION SYSTEM - An injection system ( | 08-13-2009 |
| 20100018030 | Cylindrical housing and method of producing same - A cylindrical housing has a coaxial opening having a circular cross-section and at least one line having an oval cross-section, extending parallel to a longitudinal axis. To produce the cylindrical housing, the coaxial opening is produced with a large diameter having at least one bore with a small diameter extending parallel to the opening in a cylindrical blank, and subsequently a mandrel is inserted into the coaxial opening, wherein forces are then applied onto a circumferential surface of the drilled cylindrical blank for the production of the cylindrical housing. Another possibility for production is to roll a metal strip such that a concavity is formed, to create a bore therein and to apply forces in order to level out the concavity. An oval cross-section is imparted on each bore extending in concavities. The metal strip is wound about a mandrel to create the coaxial opening of the circular cross-section. | 01-28-2010 |
| 20100102138 | PIEZOELECTRIC COMPONENT COMPRISING A SECURITY LAYER AND AN INFILTRATION BARRIER AND A METHOD FOR THE PRODUCTION THEREOF - A piezoelectric component with a monolithic stack, has electrode layers and piezoceramic layers arranged alternately one on top of the other, the piezoceramic layers have a piezoceramic, and having at least one porous security layer arranged in the stack for the formation of a crack if mechanical overload of the stack should occur. The piezoelectric component has an infiltration barrier arranged between the security layer and a lateral surface section of the stack for suppressing the penetration of a foreign substance into the security layer. The piezoelectric component can be as a piezoactuator for controlling a valve, particularly a valve of an internal combustion engine. | 04-29-2010 |
