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| Number | Title | Issue Date |
| 8051839 | Injection control system A method of operating a fuel injector including a piezoelectric actuator having a stack of piezoelectric elements, and wherein in use the injector communicates with a fuel rail, the method comprises: applying a discharge current to the actuator for a discharge perio... | 11/08/2011 |
| 7841320 | Actuator unit and method for manufacturing an actuator unit An actuator unit has a tube spring (32), a piezoelectric actuator (31), that is inserted into the tube spring (32), a first cap (33), that is connected to the tube spring (32) at a first free end of the tube spring (32) and ... | 11/30/2010 |
| 7802561 | Method for controlling a valve and method for controlling a pump/nozzle device with a valve A valve has a piezo actuator, a valve element, a valve body and a valve seat. At a predeterminable point in time, the valve element is controlled by a discharging process of the piezo actuator from a position in which it rests against the valve seat to a predetermin... | 09/28/2010 |
| 7721716 | High pressure piezoelectric fuel injector A combined injector and fuel pump suitable for high pressure direct injection of heavy fuels into Diesel engines, in particular small light weight Diesel engines as may be used in small aircraft. The injector utilizes a piezoelectric actuator driving a piston assemb... | 05/25/2010 |
| 7690358 | Method and device for controlling a valve An piezo actuator loading signal is determined and generated according to an output value and a pilot control value which depends on at least one operational parameter. The loading signal causes that a valve member moves into a valve seat. A first value characterist... | 04/06/2010 |
| 7665445 | Motion coupler for a piezoelectric actuator The present disclosure is directed to a fuel injector. The fuel injector may include a casing substantially aligned along a central axis of the fuel injector. The fuel injector may also include a control valve configured to control a flow of fuel through the fuel in... | 02/23/2010 |
| 7527041 | Fuel injection valve A fuel injection valve introduces a fuel into an engine and controlling fuel flow to reduce variability between injection events. The fuel injection valve employs an arrangement for a valve nozzle that cooperates with a valve needle to provide a range of needle move... | 05/05/2009 |
| 7509946 | Piezoelectric fuel injectors A method for controlling a piezoelectric actuator of a fuel injector for controlling the quantity of fuel injected into the cylinders of an internal combustion engine controls the voltage across the injector in accordance with a voltage/charge vs. time profile in wh... | 03/31/2009 |
| 7431220 | Injector for fuel injection systems of internal combustion engines, especially direct-injection diesel engines A fuel injector having a piezoelectric actuator in an injector body and held in contact with the injector body on one side and with a sleevelike booster piston on the other via first spring means. A nozzle body joined to the injector body and a stepped nozzle needle... | 10/07/2008 |
| 7422006 | Fuel injector A fuel injector has a piezoelectric or magnetostrictive actuator, which actuates a valve-closure member cooperating with a valve-seat surface to form a sealing seat. A hydraulic coupler includes a master piston, a slave piston, and a coupler volumeformed in-between.... | 09/09/2008 |
| 7418949 | Common rail injector A common rail injector having an injector housing with a fuel inlet connected to a central high-pressure fuel source outside the injector housing and to a pressure chamber inside the injector housing from which pressure chamber depending on the pressure in a control... | 09/02/2008 |
| 7406951 | Fuel injector with variable actuator boosting The invention relates to a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine. The fuel injector has an injection valve member that can be actuated directly by a piezoelectric actuator. This injection valve member is contai... | 08/05/2008 |
| 7406952 | Method and device for controllling an injector An injector has a valve pin whose position is adjustable according to the pressure prevailing in a control chamber and which blocks a fluid flow through at least one injection port in a closed position. The injector has a control chamber that is hydraulically couple... | 08/05/2008 |
| 7401596 | Piezo stack temperature estimator The invention relates to a method of estimating the temperature of a piezoelectric actuator body for controlling the operation of a fuel injector mounted within an engine housing and supplied with fuel from a high pressure fuel pump. The piezoelectric actuator body ... | 07/22/2008 |
| 7398933 | Injection valve An injector, in particular an injector for a combustion engine, includes at least one nozzle module which has an injection nozzle and a supply line for a fluid under a supply pressure, and a valve-control module, which is in operative connection with the nozzle modu... | 07/15/2008 |
| 7387110 | Common rail injector A common rail injector having an injector housing having a fuel supply line which communicates with a central high-pressure fuel source outside the injector housing and with a pressure chamber inside the injector housing, from which pressure chamber, as a function o... | 06/17/2008 |
| 7353806 | Fuel injector with pressure balancing valve A fuel injector device, for injecting fuel into a combustion chamber of an internal combustion engine, has a nozzle valve and nozzle valve control assembly adapted to use a control valve and high pressure fuel in the fuel injector in order to actuate movement of the... | 04/08/2008 |
| 7334329 | Method for pretreating a piezoelectric ceramic and method for adjusting an injection valve In a method for pretreating a piezoelectric ceramic (1) and a method for adjusting an injection valve (7), the piezoelectric ceramic (1) is exposed to environmental conditions, leading to a reduction of polarization and also a reduction of the l... | 02/26/2008 |
| 7318417 | Injection unit and injection method for an internal combustion engine An injection unit has an injector arrangement connected to a pressure reservoir by a pressure line arrangement The injector arrangement has at least one servo injection valve and a control valve for the release of fuel from a control chamber into a fuel return line ... | 01/15/2008 |
| 7316220 | Actuator drive system and fuel injection system A control device of a fuel injection system of an engine calculates command injection timing for starting an injection at target injection timing, and a command injection period for obtaining a target injection quantity. The control device monitors a charging voltag... | 01/08/2008 |
| 7315251 | Alert for indicating field replaceable unit status and configuration The present invention is a method and system for indicating field replaceable unit status and configuration. A visible alert may be mounted on a card, in proximity to a location for a field replaceable unit. The visible alert may indicate a failed replaceable unit o... | 01/01/2008 |
| 7275522 | Method and apparatus for controlling a valve, and method and apparatus for controlling a pump-nozzle apparatus with the valve A valve has a piezoelectric actuator with a valve element, a valve body and a valve seat. In order to control the valve, the valve element is moved into the valve seat from a position remote from the valve seat by means of a charging process at a prescribable first ... | 10/02/2007 |
| 7267111 | Fuel injector Known fuel injectors have a valve housing in which an actuator and an hydraulic coupler are arranged, an electrical plug being provided on the valve housing for contact with a voltage source. The cables running from the plug to the actuator must be guided around the... | 09/11/2007 |
| 7240856 | Fuel injection control device This fuel injection control device includes: a fuel injection valve; a piezoelectric element or a solenoid which drives the fuel injection valve; a fuel pump which pressurizes fuel and supplies it to the fuel injection valve; a magnetostrictive element which drives ... | 07/10/2007 |
| 7237536 | Method for ascertaining the position of a mobile closing element of an injection valve In a method for ascertaining the position of a mobile closing element of an injector valve in a motor vehicle engine, in which the closing element is driven by a piezoelectric element for opening or closing the injection valve and a voltage signal allocated to an el... | 07/03/2007 |
| 7234650 | Three-way valve and fuel injection device having the same A three-way valve having a valve chamber with a low-pressure port, a high-pressure port, and a control port is provided. The three-way valve also has a control valve installed in the valve chamber for closing one of the low-pressure port and the high-pressure port. ... | 06/26/2007 |
| 7225790 | Valve device and method for injecting a gaseous fuel A valve device and a method directly inject gaseous fuel into a combustion chamber. A rapid response in a simple and compact design is achieved by a piezoelectric, magnetostrictive, or electromagnetic actuator that acts on a transmission device that comprises at lea... | 06/05/2007 |
| 7188782 | Fuel injector provided with a servo leakage free valve A fuel injector having a pressure booster whose booster piston separates a working chamber, which is continuously acted on with fuel by means of a pressure source, from a differential pressure chamber that can be pressure-relieved; a pressure change in the different... | 03/13/2007 |
| 7175105 | Actuator for a fuel injector of an internal combustion engine In order to increase the lifetime for a piezoactuator of a fuel injector and to make possible a reliable seal of the piezoactor especially for comparatively thin head plates as well a gas exchange passage running through an actuator housing (52, 54) is provid... | 02/13/2007 |
| 7168633 | Spraying device A spraying device comprises a spraying plate, having a plurality of tiny holes, a vibrating element, set on a periphery of the spraying plate, and driving a vibrating movement thereof, a wrapping layer, made of soft material and tightly surrounding the vibrating ele... | 01/30/2007 |
| 7145282 | Actuator An actuator includes a piezoelectric stack within a housing that applies a compressive load to the stack. The housing may include a cylindrical tube closed at one end and may seal the stack against fluid pressure. The housing may be shorter than the length of the pi... | 12/05/2006 |
| 7140353 | Fuel injector with piezoelectric actuator preload An piezoelectric actuated injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importan... | 11/28/2006 |
| 7100577 | Common rail directly actuated fuel injection valve with a pressurized hydraulic transmission device and a method of operating same A common rail directly actuated fuel injection valve is disclosed with a hydraulic transmission device that is fluidly isolated from the fuel so that the hydraulic fluid can be different from the fuel. This arrangement is particularly suitable for valves that inject... | 09/05/2006 |
| 7077379 | Fuel injector using two piezoelectric devices A fuel injector uses two or more individual piezoelectric devices. A first piezoelectric device is used to actuate a valve which allows pressurized fuel to pass from a pressure chamber through an outlet port. The fuel is pressurized by a second piezoelectric device.... | 07/18/2006 |
| 7047946 | Method for operating an internal combustion engine In a method for forming a fuel/air mixture in a direct-injection internal combustion engine with a fuel injection nozzle arranged in each cylinder, a closing member of the fuel injection nozzle is moved from a closed position to an operating position by means of a c... | 05/23/2006 |
| 7042143 | Piezoceramic multilayer actuator with a transition region between the active region and the inactive head and foot regions In piezoceramic multilayer actuators, the head region and the foot region consist of inactive, that is to say electrode-free, piezoceramic layers. Due to the arrangement of the metallic electrodes and the layers of the piezoceramic materials, the shrinkage of the pi... | 05/09/2006 |
| 7040297 | Method for controlling a piezo-actuated fuel-injection valve The current guided to the piezo actuator and the voltage which is consequently established thereon is used for calculating with the help of a non-linear actuator model, the characteristics of the longitudinal variations (s) and the force (F) exerted by the actuator ... | 05/09/2006 |
| 7036198 | Method of assembling an actuator arrangement A method of assembling a piezoelectric actuator arrangement comprises providing a piezoelectric element having first and second ends and arranging the piezoelectric element within a sleeve member such that the inner surface of the sleeve member defines, together wit... | 05/02/2006 |
| 7032833 | Fuel injection valve In a fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, a piezoelectric or magnetostrictive actuator is surrounded by a compensation sleeve. The compensation sleeve is made of a material exhibiting virtually no, o... | 04/25/2006 |
| 7025044 | Pump assembly and method A pump assembly includes a high-pressure pump that flows pressurized working fluid in a fuel injection system of a diesel engine. The assembly includes a pilot-operated inlet throttle valve that receives a flow of low-pressure fluid from a feed pump and controls the... | 04/11/2006 |
