A communication system includes a plurality of recipient processors (14, 15, 16) located at geographically remote locations with respect to each other and connected for communication with an information provider processor (12), over the communications network. The provider (12) and recipient processors (14, 15, 16) may comprise respective computers coupled for communication on the Internet or WWW. The provider processor is capable of providing information from any suitable source, by communicating such information over a communications network. However, access to the information by the recipient processors is controlled, based on the geographic location or region of the recipient processors. Each recipient processor is operably associated with a positioning system for providing geographic location information corresponding to the location or region in which the positioning system is located, such as a global positioning system GPS (20, 21, 22). The geographic position information is used to determine whether or not the processor requesting the information is within a restricted or non-restricted region.

System and process for limiting distribution of information on a communication network based on geographic location

A fuel injection system for an internal combustion engine including a fuel injector which can be subjected to fuel at high pressure and is actuatable via a metering valve device by which the pressure in a pressure booster control chamber is controllable such that the pressure in a pressure booster pressure chamber, defined by a pressure booster piston, that can be filled with fuel from the high-pressure fuel source via a filling path in which a check valve is disposed and that is in communication with an injection valve member pressure chamber, is increased by the pressure booster piston such that an injection valve member opens for injecting fuel, whereupon fuel is positively displaced out of a damping chamber via a damping path, in which a damping throttle is disposed. To assure stable injection performance, the damping path is embodied such and connected in such a way to the filling path that the fuel positively displaced from the damping chamber via the damping throttle in an injection event reaches the filling path of the pressure booster pressure chamber via the damping path.

Fuel injection system

Kraftstoffeinspritzventil fur Brennkraftmaschinen mit einem in einem Ventilkorper (1) ausgebildeten auseren Ventilsitz (107), der eine Konusform mit einem auseren Offnungswinkel (a) aufweist und von dem wenigstens eine ausere Einspritzoffnung (10) abgeht. Weiter ist ein innerer Ventilsitz (207) ausgebildet, der ebenfalls eine Konusform mit einem inneren Offnungswinkel (b) aufweist und von dem wenigstens eine innere Einspritzoffnung (12) abgeht. Im Ventilkorper (1) ist eine Ventilhohlnadel (15) angeordnet, die eine ausere Ventildichtflache (30) aufweist, mit der sie mit dem auseren Ventilsitz (107) zusammenwirkt und so die Offnung der wenigstens einen auseren Einspritzoffnung (10) steuert. In der Ventilhohlnadel (15) ist eine Ventilnadel (17) angeordnet, die mit einer inneren Ventildichtflache (32) mit dem inneren Ventilsitz (207) zur Steuerung der wenigstens einen inneren Einspritzoffnungen (12) zusammenwirkt, wobei die Offnungswinkel (a; b) des inneren Ventilsitzes (207) und des auseren Ventilsitzes (107) verschieden sind.

Kraftstoffeinspritzventil für Brennkraftmaschinen

Between a movable core chamber and a fuel supply passage, a needle guide slidably supports a needle fixed to a movable core. The needle guide has a communication hole which fluidly connects the movable core chamber and the fuel supply passage. An opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed. In a suction stroke, it is restricted that the movable core and the needle bounce toward the fixed core after the needle biases a suction valve toward a stopper by means of a biasing force of a second spring. A relationship between the energization start time of the coil and the fuel discharged amount is properly maintained, so that the fuel discharged amount of the high-pressure pump can be controlled correctly.

High pressure pump

The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).

Fuel-injection valve

Es wird ein System, bestehend aus einem piezoelektrischen Element und einer Steuereinheit (17) beschrieben, bei der das piezoelektrische Element (1) und die Steuereinheit (17) als eine Baueinheit ausgebildet sind. Dadurch ergeben sich Vorteile hinsichtlich der Fertigung und ein ubergeordnetes Steuergerat kann entlastet werden.

System zum Betreiben eines piezoelektrischen Elements

The fuel injector (10) for an internal combustion motor, and especially in a common rail fuel injection system, has a control valve (38) with at least three connections and at least two settings. It has a high pressure fluid inlet (48) and a low pressure fluid outlet (50) on one side and, on the other side, a connection for a flow throttle (40). The flow throttle is structured to give a greater throttle action towards the control valve than towards the control zone (34).

Fuel injector, for a common rail fuel injection system at an IC motor, has a single flow throttle with a greater throttle action towards the control valve

The piezo actuator has a conductive safety bar (13) leading from an outer electrode (6a) to inner electrodes (8, 9) for contacting the inner electrodes that are assigned a polarity, where the safety bar forms an electrical resistive section with a contact surface (14) for the inner electrodes. The safety bar is formed between a partial surface of the inner electrode (9), which contacts with the outer electrode, and a surface of the inner electrodes, which lies inside the piezo actuator.

Piezo actuator i.e. piezo injector, for controlling needle rise in fuel injection system i.e. common rail injection system, of internal combustion engine for vehicle, has safety bar forming electrical resistive section with contact surface

A description of the processes in injection systems entaills the interdisciplinary application of methods of fluid mechanics, technical mechanics, thermodynamics, electrical engineering and control engineering. Pressures are very high and pilot injection to the main injection requires a minimum delivery of 1.5 mm of fuel per injection with a metering accuracy of – 0.5 mm in flexibly selectable intervals. This imposes substantial demands on the quality of models and numerical methods. Moreover, the processes in the compressible fluid are profoundly transient. Thus, components are endangered by cavitation erosion and can be excited to oscillations with high mechanical loads. Substantially influencing fuel properties and bearing or plunger/liner clearances in pumps, the considerable heating of the fuel by throttling and frictional losses must be quantifiable as well.

5 Fuel Injection Systems

A fuel injection device ( 10 ) is used in internal combustion engines ( 94 ) It includes a housing ( 12 ) with an injection end ( 18 ) A recess ( 20 ) extends in the housing ( 12 ) An axially movable valve element ( 24 ) is disposed in the recess ( 20 ); it cooperates with a valve seat and has a pressure face ( 36 ), remote from the injection end ( 18 ), which axially defines a control chamber ( 38 ) A sleeve part ( 40 ) is also provided, which radially defines the control chamber ( 38 ) A device ( 55 ) puts the sleeve part ( 40 ) against a first housing portion ( 16 ) and the valve element ( 24 ) in the direction of the injection end ( 18 ) with prestressing To improve the precision in operation of the fuel injection device ( 10 ), it is proposed that the device ( 55 ) include separate prestressing devices ( 46, 50 ); one prestressing device ( 50 ) acts upon the valve element ( 24 ), and another prestressing device ( 46 ) acts upon the sleeve part ( 40 )

Friedrich Boecking

Papers

System zum Betreiben eines piezoelektrischen Elements

Fuel injector, for a common rail fuel injection system at an IC motor, has a single flow throttle with a greater throttle action towards the control valve

Piezo actuator i.e. piezo injector, for controlling needle rise in fuel injection system i.e. common rail injection system, of internal combustion engine for vehicle, has safety bar forming electrical resistive section with contact surface

5 Fuel Injection Systems

Fuel injection device for an internal combustion motors, especially common rail injector, fuel system and internal combustion engine