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

A piezoelectric actuator (3) and an injector for an internal combustion engine are proposed, the electromagnetic compatibility of which is significantly improved in comparison with conventional injectors.

Piezoelectric actuator and injector comrising a piezoelectric actuator for an internal combustion engine

A control unit for controlling a pressure buildup by a pump unit in a fuel injection system. The control unit has a control valve and a valve actuation unit connected to the control valve. The control valve is embodied as an inlet valve that opens inward in the flow direction. The control unit has a valve body that is supported so that the valve body moves axially in a housing of the control unit and rests against a valve seat of the control valve from the inside when the control valve is closed. In order to give the through flow curve of the control valve as flat a course as possible with small strokes (S small ) of the control valve. The control unit includes a throttle device that throttles the flow through the control valve when the control valve is open by a small stroke (S small ).

Control unit for controlling the pressure buildup in a pump unit

An injection device for fuel (1) is disclosed, comprising a system pressure region (14), in which a system pressure is provided and an injection pressure region (11), in which an injection pressure is provided, whereby the injection pressure is higher than the system pressure. The injection pressure region (11) and the system pressure region (14) are linked to each other, by means of a throttle device (12, 13). The system pressure, in the system pressure region (14), may be regulated by means of a system pressure valve (16). Furthermore, a method for generating a system pressure in an injection device for fuel is disclosed.

Device and method for generating a system pressure in an injection unit

The invention relates to a control valve for liquids, comprising a piezo-actuator (2), a translation device which is used to translate the lift of said piezo-actuator (2) and a control valve (14) which can be actuated by the translation device. A temperature compensating device (27) for compensating length changes in the piezo-actuator caused by a change in temperature is also provided. The translation device is embodied in the form of a diaphragm (3) and is arranged in a pre-tensed state. The diaphragm (3) translates the lift of the piezo-actuator with a translation ratio a/b. The piezo-actuator (2) is sealed off from the liquid to be controlled by the diaphragm(3).

Control valve for liquids

Die Erfindung betrifft einen Zylinderkopf fur eine Kraftstoffhochdruckpumpe in einem Kraftstoffeinspritzsystem, insbesondere in einem Common-Rail-Einspritzsystem, wobei im Zylinderkopf eine Hochdruckbohrung (1) zur Ausbildung eines Pumpenarbeitsraumes (2) und zur Aufnahme eines Pumpenkolbens (3) sowie wenigstens eine weitere Bohrung (4, 5) zur Aufnahme eines Saugventils (6) und/oder eines Hochdruckventils (7) ausgebildet sind. Erfindungsgemas ist der Zylinderkopf einteilig ausgebildet und umfasst mehrere Hochdruckabgange jeweils in Form eines Ansatzes (8, 9) mit einer Bohrung (10, 11), die dem Anschluss eines Injektors und/oder der Aufnahme eines Drucksensors (17) dienen, wobei wenigstens eine Bohrung (10, 11) eines Ansatzes (8, 9) koaxial in Bezug auf die Hochdruckbohrung (5) angeordnet ist, in welcher das Hochdruckventil (7) aufgenommen ist. Ferner betrifft die Erfindung eine Kraftstoffhochdruckpumpe mit wenigstens einem solchen Zylinderkopf.

Friedrich Boecking

Papers

Piezoelectric actuator and injector comrising a piezoelectric actuator for an internal combustion engine

Control unit for controlling the pressure buildup in a pump unit

Device and method for generating a system pressure in an injection unit

Control valve for liquids

Zylinderkopf für eine Kraftstoffhochdruckpumpe