Patent application number | Description | Published |
20080257980 | Fuel Injector - The invention relates to a fuel injector having an injector housing containing a pressure chamber from which highly pressurized fuel is injected into a combustion chamber of an internal combustion engine. A nozzle needle control chamber is provided in the housing such that a nozzle needle has its first end disposed in the nozzle needle control chamber. A second end of the nozzle needle lifts away from its seat as a function of the pressure in the nozzle needle control chamber. The pressure in the nozzle needle control chamber is controlled by a switching valve device which is equipped with a piezoelectric actuator that expands longitudinally when supplied with current. A valve piston is coupled to the piezoelectric actuator and has its free end of the disposed in a valve piston control chamber. The valve piston control chamber communicates with the nozzle needle control chamber. In the charged state of the piezoelectric actuator, the free end of the valve piston interrupts a hydraulic pressure-relief connection between the valve piston control chamber and a pressure-relief chamber. | 10-23-2008 |
20090108093 | FUEL INJECTOR - The invention relates to a fuel injector having an injector housing which has a high-pressure fuel connection which is connected outside the injector housing to a central high-pressure fuel source and inside the injector housing to a pressure space. From the fuel injector highly pressurized fuel is injected into a combustion chamber of an internal combustion engine as a function of the pressure in a control space when a nozzle needle opens In order to provide a fuel injector which can be manufactured inexpensively, the pressure in the control space is controlled directly by a magnetic actuator. | 04-30-2009 |
20090230220 | INJECTOR FOR A FUEL INJECTION SYSTEM - A leak-free injector is proposed, the closing force of which is increased by a closing piston. An injector has a nozzle needle and a control valve, the nozzle needle being guided in an injector housing and cooperating with a nozzle needle seat of the injector housing. A high-pressure chamber is present between the control valve and the nozzle needle seat, and the closing piston is provided on the nozzle needle. The closing piston subdivides the high-pressure chamber into a first region and a second region. The two regions of the high-pressure chamber communicate hydraulically via a closing throttle restriction. | 09-17-2009 |
20090308353 | FUEL INJECTOR WITH AN IMPROVED CONTROL VALVE - The invention relates to a fuel injector ( | 12-17-2009 |
20090308956 | FUEL INJECTOR - The invention relates to a fuel injector with an injector housing which has a high-pressure fuel connection which is connected to a central high-pressure fuel source outside the injector housing, and with a pressure chamber within the injector housing. According to the pressure in a coupling chamber, fuel under a high pressure is injected from the pressure chamber into a combustion chamber of an internal combustion engine when a nozzle valve opens. The nozzle valve has a combustion chamber-remote end with a control pressure surface which is acted upon in the coupling chamber by the coupling chamber pressure. In order to create a fuel injector which can be produced inexpensively, the nozzle valve has at least one low-pressure surface which is averted from the combustion chamber and acted upon with low pressure. | 12-17-2009 |
20100019068 | FUEL INJECTOR WITH AN INTEGRATED PRESSURE BOOSTER - Proposed is a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector has a housing in which are arranged an injection valve element with a nozzle needle, a pressure boosting device, and a first control valve, and a second control valve. The first control valve controls a control space of the nozzle needle and the second control valve controls a differential pressure space of the pressure boosting device. A first return flow connection is provided for discharging the control quantity of the control space of the nozzle needle, and a second return flow connection is provided for discharging the control quantity of the pressure boosting device. The two return flow connections are arranged on different housing parts of the housing. | 01-28-2010 |
20100050990 | INJECTOR FOR INJECTING FUEL INTO COMBUSTION CHAMBERS OF INTERNAL COMBUSTION ENGINES - The invention relates to an injector for injecting fuel into combustion chambers of internal combustion engines, in particular a common rail injector. The injector has a high-pressure region and a valve element which is axially adjustable between a closed position and an open position in which the flow of fuel is enabled. According to the invention, it is provided that the valve element includes a first partial element and at least one separate second partial element, which partial elements are hydraulically coupled to one another by a coupler chamber. The coupler chamber is hydraulically connected only in one axial direction to the high-pressure region of the injector. | 03-04-2010 |
20100102143 | FUEL INJECTOR - The invention relates to a fuel injector comprising an injector housing having a pressure chamber from which fuel subjected to a high pressure is injected into a combustion chamber of an internal combustion engine when the pressure in a control chamber expands into a pressure relief chamber by a control valve device. The aim of the invention is to create a fuel injector which has a long service life even though subjected to high pressures. To this end, the injector includes a low-pressure supply line which is connected to a low-pressure return line by a purge path extending through the pressure relief chamber. | 04-29-2010 |
20100116251 | AREA OF INTERSECTION BETWEEN A HIGH-PRESSURE CHAMBER AND A HIGH-PRESSURE DUCT - The invention relates to an area of intersection between a high-pressure chamber and a high-pressure duct. To increase the strength in the area of intersection, it is possible to round the area of intersection. The area of intersection includes at least one planar area or an area that is curved markedly less than the remaining area of intersection. The planar area may also be embodied as only nearly planar. The high-pressure chamber and the high-pressure duct are also called functional chambers. By means of the planar or nearly planar area, an intersection geometry is created, in which tensile stresses of the functional chambers that occur upon subjection to pressure are not superimposed directly and add up as they do in conventional intersection geometries. By means of the planar area in the area of intersection, it is attained that in the intersection geometry of the invention, under pressure, local pressure stresses or markedly reduced tensile stresses occur in an inner wall of the high-pressure chamber and are then superimposed with the tensile stresses in an inner wall of the high-pressure duct. Since with the intersection geometry of the invention, a tensile stress has only a reduced tensile stress or in the best case a pressure stress superimposed on it, the total is less and hence the maximum stress that occurs is reduced markedly. | 05-13-2010 |
20100175665 | FUEL INJECTOR - The invention relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector has a multi-part injection valve element, which is adjustable between a closing position and an opening position and includes a first part and at least one second part that is adjustable relative to the first part. The first and second parts are coupled to one another via a hydraulic coupler volume. According to the invention, it is provided that the first part is guided in the second part, or the second part is guided in the first part, and that the coupler volume communicates with an injector volume via at least one throttle arrangement. The throttle arrangement is embodied such that the volumetric through flow increases only disproportionately little with an increasing pressure difference between the coupler volume and the injector volume. | 07-15-2010 |
20100193611 | THROTTLE ON A VALVE NEEDLE OF A FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES - The invention relates to a fuel injection valve for internal combustion engines, having a valve body, in which a pressure chamber is configured. A valve needle is disposed in the pressure chamber in a longitudinally displaceable manner. The valve body has a valve seat which interacts with a sealing surface configured on the valve needle. The valve seat delimits the pressure chamber, thus enabling or interrupting a fuel flow to at least one injection opening by the interaction of the valve needle with the valve seat. To this end, the fuel flow to the injection openings occurs between the valve needle and the wall of the pressure chamber, through a sharp-edged gap throttle which is formed between the valve needle and the wall of the pressure chamber. | 08-05-2010 |
20100294241 | FUEL INJECTOR THE CONTROL VALVE ELEMENT OF WHICH HAS A SUPPORT REGION - The invention relates to an injector, in particular, a common-rail injector for injection of fuel into a combustion chamber of an internal combustion engine. An injection valve element, adjustable between a closed position and an open position, is controllable by means of a control valve. The control valve has a control valve element, adjustable between a closed position and an open position by means of an actuator, which in the closed position is an at least almost pressure-equalized and has a sealing line which cooperates in a sealing manner with a control valve seat. The sealing line of the control valve element is lifted off the control valve seat in the open position and hence opens fuel flow from a high pressure region to a low pressure region of the injector. According to the invention, the control valve element has a support region extending over the sealing line in a radial direction to the high pressure region. | 11-25-2010 |
20110139906 | FUEL INJECTOR - The invention relates to a fuel injector and, in particular, to a common-rail injector for injecting fuel into a combustion chamber of an internal combustion engine with a multi-part injection valve element, which can be adjusted between an open position and a closed position. A first part and a second part of the injection valve element are coupled to one another via a hydraulic coupler, which is bounded radially by a first guide for the first part and by a second guide for the second part. According to the invention, at least some sections of the first and the second guide are surrounded at their outer radii by fuel under high pressure, and the pressure realized in the hydraulic coupler is lower than the pressure radially outside the guides. | 06-16-2011 |
20120031376 | FUEL INJECTOR HAVING PRESSURE SENSOR - The invention relates to a fuel injector ( | 02-09-2012 |
20120205470 | METHOD FOR PRODUCING A FUEL INJECTION VALVE, AND FUEL INJECTION VALVE - The invention relates to a method for producing a fuel injection valve ( | 08-16-2012 |
20120305675 | FUEL INJECTOR AND METHOD FOR THE MANUFACTURE AND/OR ASSEMBLY OF A NOZZLE NEEDLE ASSEMBLY - The invention relates to a fuel injector for a fuel injection system, in particular a common rail injection system, having a nozzle body ( | 12-06-2012 |
20130096801 | METHOD AND CONTROL UNIT FOR OPERATING A LINE CIRCUIT FOR WASTE HEAT UTILIZATION OF AN INTERNAL COMBUSTION ENGINE - A method for operating a line circuit ( | 04-18-2013 |
20130118174 | PISTON ENGINE DRIVABLE USING A STEAM POWER PROCESS - A piston engine ( | 05-16-2013 |
20130118175 | PISTON ENGINE DRIVABLE USING A STEAM POWER PROCESS - A piston engine ( | 05-16-2013 |
20130174693 | ELECTROMAGNETIC CLUTCH FOR CONNECTING A STEAM ENGINE TO A COMBUSTION ENGINE - The invention relates to an electromagnetic clutch ( | 07-11-2013 |
20130192225 | DEVICE AND METHOD FOR THE RECOVERY OF WASTE HEAT OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a device and a method for the recovery of waste heat from an internal combustion engine ( | 08-01-2013 |
20130283790 | DEVICE AND METHOD FOR THE RECOVERY OF WASTE HEAT FROM AN INTERNAL COMBUSTION ENGINE - The invention relates to a device and a method for the recovery of waste heat from an internal combustion engine ( | 10-31-2013 |
20140075934 | LINE CIRCUIT AND METHOD FOR OPERATING A LINE CIRCUIT FOR WASTE-HEAT UTILIZATION OF AN INTERNAL COMBUSTION ENGINE - A line circuit ( | 03-20-2014 |
20140075942 | METHOD FOR OPERATING A STEAM CYCLE PROCESS - The invention relates to a method for operating a steam cycle process for using the heat of an internal combustion engine ( | 03-20-2014 |
20140150426 | DEVICE AND METHOD FOR USING THE WASTE HEAT OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method and a device for using the waste heat of an internal combustion engine ( | 06-05-2014 |