Patent application number | Description | Published |
20080229815 | Sensor system for measuring pressure - A sensor system for measuring the pressure in the combustion chamber of an internal combustion engine, by the use of which a high measuring accuracy may be achieved, based on high measuring sensitivity and great thermal stability. In addition, the construction of the sensor system makes possible great system flexibility, and particularly very space-saving installation in the combustion chamber of an internal combustion engine. For this purpose, the sensor system includes at least one electrically conductive spring element and at least one electrically conductive counter-element,
| 09-25-2008 |
20090321408 | SEAL FOR A GLOW PLUG - A glow plug for a combustion chamber of a self-igniting internal combustion engine has a ceramic heating element designed as a sheathed-element glow plug, which is surrounded by a supporting tube. The ceramic heating element is sealed with respect to the combustion chamber of the internal combustion engine by a seal in the supporting tube. The seal is designed as a sealing element made of an FeNi alloy having an Invar effect. | 12-31-2009 |
20100037698 | PRESSURE-MEASURING DEVICE - A pressure-measuring device is situated in a chamber of an internal combustion engine. The pressure-measuring device has a housing, a force-transmitting element that protrudes partly from the housing at a chamber-side opening of the housing, and a pressure sensor that is situated in an interior space of the housing. The pressure sensor stands in effective connection to the force-transmitting element. In addition, a diaphragm is provided that seals the interior space of the housing, in which the pressure sensor is situated, against the chamber-side opening. The diaphragm, which is preferably fashioned as a metal diaphragm, has a force-transmitting segment that is oriented in an axial direction of the force-transmitting element. Moreover, the pressure sensor stands in effective connection with the force-transmitting element via the force-transmitting segment of the diaphragm. In this way, there takes place at least a partial compensation of thermally caused changes in length of the diaphragm, caused for example by hot combustion gases, and resulting in periodic impairments of the pressure measurement made by the pressure sensor. | 02-18-2010 |
20100170346 | SENSOR ELEMENT FOR CAPACITIVE DIFFERENTIAL-PRESSURE SENSING - A sensor design, respectively a micromechanical sensor structure for capacitive relative-pressure measurement, that will allow very small pressure differentials to be reliably recorded at high absolute pressures even in harsh, particle-laden measuring environments. For that purpose, the micromechanical sensor element includes a deflectable diaphragm structure which is provided with at least one deflectable electrode, and a fixed support structure for at least one fixed counter-electrode which is located opposite the deflectable electrode. The diaphragm structure includes two mutually parallel configured diaphragms that are joined rigidly to one another via at least one connecting crosspiece, so that each application of force to one of the two diaphragms is directly transmitted to the respective other diaphragm. The first diaphragm is able to be pressurized by a first measuring pressure emanating from the front side of the sensor element, and the second diaphragm is able to be pressurized by a second measuring pressure emanating from the rear side of the sensor element. The fixed counter-electrode is located in the sealed volume between the two diaphragms of the diaphragm structure. | 07-08-2010 |
20100294028 | DEVICE FOR DETECTING A COMBUSTION CHAMBER PRESSURE OF AN INTERNAL COMBUSTION ENGINE - A device for detecting a combustion chamber pressure of an internal combustion engine, in particular a gasoline engine. The device includes a sensor housing, the sensor housing being set up to be at least partially introduced into a combustion chamber of the internal combustion engine. At least one mechanical-electrical transducer element is accommodated inside the sensor housing, which is separated from the sensor housing by at least one sensor holder, in particular a sensor holder which at least partially encloses the mechanical-electrical transducer element. The sensor holder has an at least partially rigid design. | 11-25-2010 |
20100300186 | Pressure-Measuring Device - A pressure-measuring device is to be placed in a chamber of an internal combustion engine. The pressure-measuring device has a housing, a force-transmission element projecting out of the housing, and a pressure sensor disposed in an interior chamber of the housing. On the one hand, the pressure sensor is braced on a fixation element. On the other hand, to detect a pressure prevailing inside the chamber, the pressure sensor is operatively connected to the force-transmission element. The pressure sensor has a straight-through recess through which an electrical line is routed. In addition, a positioning element is provided, which has a straight-through recess in a guide region, the electrical line being routed through the straight-through recess, and the positioning element having a reduced thickness in the guide region. This makes it possible to reduce friction of the electrical line in the guide region at the straight-through recess, so that the pressure measurement is improved. | 12-02-2010 |
20110192236 | Micromechanical sensor element for capacitive differential pressure detection - A sensor concept for capacitive pressure measurement yields reliable measurement results and is for aggressive particle-bearing measuring environments. This sensor element is a micromechanical sensor element, whose structural elements are implemented in a layered structure. The sensor element includes two pressure connections separated from each other, a deflectable carrier element for at least one deflectable measuring electrode, and at least one stationary counter electrode for the measuring electrode. The carrier element spans a closed cavity in the layered structure. The carrier element is spanned by a cap structure, and is suspended on the cap structure via a suspension web functioning as a rocker bearing. The two pressure connections are connected to the carrier element's top side which is divided by the suspension web into two separated pressure connection zones. The measuring electrode is on the carrier element's underside and the counter electrode is on the cavity's opposite wall. | 08-11-2011 |
20120174660 | COMBUSTION CHAMBER PRESSURE SENSOR FOR RECORDING A PRESSURE IN A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE - A combustion chamber pressure sensor is provided for recording a pressure in a combustion chamber of an internal combustion engine, the combustion chamber pressure sensor has a housing having an inner space that is at least partially enclosed by the housing. At least one mechanical-electrical transducer element, for recording the pressure, is accommodated in the housing. The housing has at least one housing opening. The housing opening is sealed by at least one diaphragm. The diaphragm has at least one convex curvature towards the inner space. | 07-12-2012 |
20120234084 | Device for detecting a combustion chamber pressure of an internal combustion engine - A device for detecting a combustion chamber pressure of an internal combustion engine includes a sensor housing which is designed to be at least partially introduced into a combustion chamber of the internal combustion engine. On the combustion chamber side, the sensor housing has an opening which is closed by at least one diaphragm. At least one mechanical-electrical transducer element is accommodated inside the sensor housing. Furthermore, at least one transmission element is provided, which is implemented separately from the sensor housing, for transmitting a deformation of the diaphragm to the mechanical-electrical transducer element. | 09-20-2012 |
20150027213 | Pressure-Measuring Device with additional diaphragm - A pressure-measuring device for recording a pressure in a combustion chamber of an internal combustion engine, having a force transmission body, situated in a housing, which is exposed to the combustion chamber and which transmits the combustion chamber pressure to a pressure-measuring unit at least indirectly by an axial motion, and having a flexible diaphragm, which is situated between the force transmission body and the housing. The flexible diaphragm is configured to be resilient to implement the axial motion of the force transmission body within the housing. A flexible additional diaphragm is connected ahead of the flexible diaphragm on the combustion chamber side, which seals the flexible diaphragm from the combustion chamber. | 01-29-2015 |