Patent application number | Description | Published |
20080202477 | Fuel Injection Valve - A fuel injection valve according to the invention serves as an injector for fuel injection systems of air-compressing, auto-ignition internal combustion engines. A piezoelectric actuator of the fuel injection valve has a plurality of ceramic layers and a plurality of electrode layers arranged between the ceramic layers. A first electrode connection extends through a cut-out of a transition piece and into an internal recess of the actuator. The first electrode connection is surrounded in the cut-out of the transition piece by a sealing means. In addition, the first electrode connection is electrically connected to a first part of the electrode layers. | 08-28-2008 |
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 |
20090179086 | FUEL INJECTOR WITH DIRECT NEEDLE CONTROL AND SERVO VALVE SUPPORT - The invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine. The injector is actuated by an actuator and is connected to a fuel supply line via which fuel is supplied under system pressure. At least one injection opening can be opened or closed off by an injection valve member, which is activated by a control piston via a control chamber to which the control piston and a piston section of the injection valve member are exposed with respective pressure faces. The control piston is a valve piston of a control valve. The pressure face of the control piston and the pressure face of the piston section of the injection valve member are exposed to the control chamber at the same side. The control piston and the piston section of the injection valve member also enclose a further control chamber which is connected to a fuel return line when the control valve is open and to the fuel supply line when the control valve is closed. | 07-16-2009 |
20090199379 | ARRANGEMENT WITH A COATED PIEZOELECTRIC ACTUATOR - An arrangement is proposed for forming a piezoelectric actuator, which has at least one piezoelectric element that in each case consists of a multi-layer structure of piezoelectric-layers, wherein internal electrodes arranged between the piezoelectric-layers in the direction of the build-up of the layers of the piezoelectric element, have an electrical voltage of different polarity alternately applied to them. Around the piezoelectric element, or in the case of multiple piezoelectric elements positioned in series in the activation direction, around the piezoelectric elements, and at least partially around the actuator head and the actuator foot there is arranged a covering system made from at least one layer of an insulating material. The at least one layer encloses the joints between the piezoelectric element or elements and the actuator head and the actuator foot, forming a seal. | 08-13-2009 |
20090200895 | PIEZOELECTRIC ACTUATOR, COMPRISING ELECTRICALLY CONTACTED PIEZOELECTRIC ELEMENTS STACKED ON TOP OF EACH OTHER - A piezoelectric actuator is proposed, having a plurality of piezoelectric elements that are stacked on top of each other. Piezoelectric layers between each of which an inner electrode having a polarity alternating within the layer structure is provided. Outer electrodes are present at two opposing lateral surfaces, through which the inner electrodes are supplied with an electric charge. From each outer electrode at least one conductive fuse bar is directed to these inner electrodes, preferably in the inactive region, for contacting each of these inner electrodes that are associated with the polarity. The fuse bar forms an electric resistance cross-section to the respective inner electrode with the respective contact surface. In case of high current flow, the respective fuse bar blows, thus forming a fusible cut-out. | 08-13-2009 |
20090266921 | FUEL INJECTOR WITH DIRECTLY TRIGGERED INJECTION VALVE MEMBER - A fuel injector having an injector body and a fuel inlet communicates with a high-pressure fuel source outside the injector body and including an actuator received in a hollow chamber from which a high-pressure inlet extends to an injection valve member. Depending on the pressure in the first hydraulic chamber, fuel is injected into a combustion chamber of an internal combustion engine when the injection valve member lifts from a seat. The actuator acts directly upon a stepped piston which defines the first hydraulic chamber and actuates a control piston. The injection valve member is guided in the control piston. | 10-29-2009 |
20100006675 | FUEL INJECTOR WITH DIRECT CONTROL OF THE INJECTION VALVE MEMBER - A fuel injector with direct triggering of an injection valve member in which an actuator is received in the hollow chamber which is subjected to fuel that is at high pressure via a high-pressure source disposed outside the fuel injector. The actuator is supplied with current in the closing position of the injection valve member and is not supplied with current in the open position of the injection valve member. The actuator acts directly on a booster piston of a pressure booster, which booster piston acts upon the booster chamber. A control chamber sleeve defining a control chamber is movably received in the booster piston. | 01-14-2010 |
20100148628 | PIEZO ACTUATOR WITH PROTECTIVE RESISTOR - Piezoactuator comprising a multiplicity of piezolayers, between each of which a layer electrode is arranged, the layer electrodes being alternately connected to a respective connection electrode. A protective resistor is provided between at least one connection electrode and the layer electrodes connected to said connection electrode. | 06-17-2010 |
20100230622 | PIEZOELECTRIC ACTUATOR - A piezoelectric actuator for a fuel injection valve has an actuator body with a multiplicity of ceramic layers and a multiplicity of electrode layers which are arranged between the ceramic layers. In this case, an external electrode is provided which is connected to some of the electrode layers. The external electrode has a plurality of longitudinal wires, which run in the longitudinal direction of the actuator body, and a plurality of weft wires, wherein a weft wire is passed through the longitudinal wires in such a way that some of the longitudinal wires run above the weft wire and other longitudinal wires run beneath the weft wire. | 09-16-2010 |
20100230623 | PIEZOELECTRIC ACTUATOR - A piezoelectric actuator for a fuel injection valve has an actuator body with a plurality of ceramic layers and a plurality of electrode layers between the ceramic layers. There is a connection area between an electrode layer and a ceramic layer adjacent to the electrode layer, where the adhesive strength between the electrode layer and the ceramic layer is reduced in parts of the connection area to provide for a predetermined breaking point within the actuator body. This allows for a controlled rupture of layers within the actuator body with high forces, in particular high shear forces such as those that occur with stress due to shock. | 09-16-2010 |
20100239445 | FLANGE OF A HIGH-PRESSURE FUEL PUMP - The invention relates to a high-pressure fuel pump for operating an internal combustion engine, with the pump being connected to a low-pressure and a high-pressure circuit. The pump includes a pump housing and a pump flange with which the pump is detachably fastened to the internal combustion engine. A pump camshaft is provided in order to compress fuel from the low-pressure circuit by way of the movement of at least one pump piston and to deliver the compressed fuel to the high-pressure circuit. The pump flange is further divided into an inner and an outer part, in a manner such that the inner part receives a bearing of the pump camshaft and the outer part receives elements of the low-pressure circuit. | 09-23-2010 |
20100269795 | PUMP, IN PARTICULAR HIGH-PRESSURE FUEL PUMP - The invention relates to a pump, particularly a high-pressure fuel pump, having a drive shaft, which includes a section that is eccentric to the rotational axis thereof and on which a ring is rotatably supported. The pump has at least one pump piston, which is directly supported on the ring via the piston base thereof, or via a support element and is driven in a stroke movement upon the rotational movement of the drive shaft. The ring has an at least approximately planar contact surface in the region of the support of the piston base or of the support element, and the support surface of the piston base or of the support element on the ring is greater than the cross-sectional surface of the shaft of the pump piston. The extension of the support surface of the piston base or of the support element in the tangential direction to the rotational axis of the drive shaft is greater than the extension thereof in the direction of the rotational axis of the drive shaft. | 10-28-2010 |
20100294240 | 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. According to the invention, a valve seat of a control valve is designed as a flat seat that has a planar valve seat surface. A circumferential edge located on the face of a sleeve of the control valve rests on the planar valve seat surface when the control valve is closed. | 11-25-2010 |
20110023704 | PUMP, IN PARTICULAR HIGH-PRESSURE FUEL PUMP - The invention relates to a pump, having at least one pump element, which has a pump piston driven in a lifting motion at least indirectly by a drive shaft. The pump piston is guided in a cylinder bore of a housing part of the pump, and the housing part has a cylindrical section surrounding the cylinder bore. A cup-shaped tappet is disposed between the pump piston and the drive shaft and has a bottom facing the drive shaft. A jacket of the tappet is guided on the cylindrical section of the housing part in a displaceable manner. A spring is provided, by means of which the tappet is pressurized toward the drive shaft. The pump piston abuts the bottom of the tappet with the front thereof facing the drive shaft. A disk is mounted on the pump piston in the end region thereof facing the base of the tappet has a greater outside diameter than the pump piston. The pump piston has the disk is secured in the tappet in the direction of the longitudinal axis of the pump piston by means of a safety element engaging in the disk. | 02-03-2011 |
20110192377 | DEVICE FOR SUPPLYING AN INTERNAL COMBUSTION ENGINE WITH FUEL - The invention relates to a device for supplying an internal combustion engine with fuel, having a fuel reservoir and a high-pressure pump, which are connected through a suction line, a metering valve which effects a change of the passage cross-section of the suction line, a rail for receiving high-pressure fuel, and a pressure control valve for controlling the pressure in the rail. The metering valve and the pressure control valve are combined in a common housing and have opposite opening directions. The metering valve and the pressure control valve have closing members which are rigidly connected to each other and are movable on a coincident movement axis. | 08-11-2011 |
20110200463 | PUMP, PARTICULARLY HIGH-PRESSURE FUEL PUMP - The invention relates to a pump, particularly a high-pressure fuel pump, having a housing, a drive shaft that is rotationally driven and has at least one drive section, and at least one pump piston, which is guided in a cylinder bore of a housing part of the pump in a sealed manner and which is driven by the drive section of the drive shaft at least indirectly in a lifting motion. The at least one pump piston is acted on by a spring element at least indirectly toward the drive section of the drive shaft. The spring element is disposed on the side of the drive shaft opposite the pump piston, and via a coupling device extending past the drive shaft it engages at least indirectly on the pump piston. | 08-18-2011 |
20110253107 | METHOD AND SYSTEM FOR INJECTING FUEL INTO INTERNAL COMBUSTION ENGINES - The invention relates to a method and to a system for injecting fuel into internal combustion engines, the injection taking place by way of an injection system and the fuel to be injected having an increased amount of fatty acids or fatty acid esters, particularly biodiesel. According to the invention, the components of the injection system coming into contact with the fuel are at least partially provided with a coating that has a low tendency for the agglomeration of fuel components, particularly fatty acids and fatty acid esters. | 10-20-2011 |
20120279473 | FUEL INJECTION SYSTEM WITH INTEGRATED HIGH-PRESSURE ACCUMULATOR - The invention relates to a fuel injection system of an internal combustion engine, comprising a high-pressure pump. A high-pressure outlet ( | 11-08-2012 |
20120325173 | FUEL INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a fuel injection system of an internal combustion engine, comprising a presupply pump ( | 12-27-2012 |