Robert Boschgmbh

Detlev Potz

Uwe Gordon

Guenter Lewentz

Thomas Kuegler

Stefan Haug

Ralf Maier

Stephan Haas

Helmut Rembold

Helmut Laufer

Nestor Rodriguez-Amaya

Ewald Eblen

Achim Brenk

Alfred Schmitt

Jean Pigeroulet

Manfred Mack

Anton Karle

Wolfgang Klenk

Michael Mennicken

Ralf Wirth

Wilhelm Christ

Nikolaus Simon

Pierre Lauvin

Hannes Pflug

Hans-Joachim Siebert

Werner Pape

Dominique Buisson

Stefan Kampmann

Gerhard Mack

Roland Bleher

Andreas Kreh

Christian Schmeisser

Barbara Heine

Rodriguez-Amaya

Guenther Lewentz

Theodor Duetsch

A fuel injection system for internal combustion engines, having a high-pressure accumulation chamber, which contains high-pressure fuel, and at least one fuel injection valve, which is connected to the high-pressure accumulation chamber. The fuel injection valve can inject the highly pressurized fuel through injection openings into a combustion chamber of the engine. The fuel injection valve has a control chamber, which is defined by a longitudinally mobile piston and is operationally connected to the fuel injection valve so that the injection cross section of the fuel injection valve is controlled as a function of the hydraulic pressure in the control chamber. A low-pressure accumulation chamber is provided, which can be connected to the control chamber, in which a predetermined fuel pressure is maintained in the low-pressure accumulation chamber that is lower than the pressure in the high-pressure accumulation chamber.

Fuel-injection system for internal combustion engines

In an injection nozzle for a fuel injection system, the opening stroke of the nozzle needle is to be limited selectively, so that different injection cross sections can be employed. To that end, the injection nozzle is provided with a nozzle body, a nozzle needle displaceable in the nozzle body, two groups of injection ports, which are uncovered as a function of an opening stroke of the nozzle needle, a piston that is connected to the nozzle needle, a stop chamber in which the piston is disposed and which is provided with an outlet, and a control valve that can open and close the outlet of the stop chamber, as a result of which the stroke of the piston in the stop chamber and thus the opening stroke of the nozzle needle can be selectively limited.

Injection nozzle

A fuel injection valve for internal combustion engines, having a valve member guided axially displaceably, counter to a closing force, in a blind bore of a valve body. The valve member on an end toward the combustion chamber has a conical valve sealing face, with which the valve sealing face cooperates with a conical valve seat face on the inward-projecting closed end of the blind bore. A blind bore region, adjoins the conical valve seat face downstream, from which region injection openings lead into the combustion chamber of the engine. The blind bore wall region that receives the injection openings is embodied conically, and the injection openings have a certain minimum spacing from an upper and a lower end of this conical blind bore wall region.

Fuel injection valve for internal combustion engines

The invention proposes a fuel injection valve for internal combustion engines, having a valve member (11), which can be displaced axially outward in a bore (9) of a valve body (1) counter to the force of a closing spring (47) and which on its end toward the combustion chamber has a closing head (13), protruding from the bore (9) and forming a valve closing member, that on its side toward the valve body (1) has a valve sealing face (15) with which it cooperates with a valve seat face (17) disposed on the end of the valve body (1) toward the combustion chamber, and having at least one injection opening on the closing head (13) which originates at a pressure chamber (19) and whose outlet opening is covered by the valve body (1) in the closing position of the valve member (11) and is uncovered in the outward-oriented opening stroke. In the fuel injection valve a damping chamber (35) is provided, which damps the stroke motion of the valve member (11) in the opening direction and moreover enables shaping of the course of injection.

Fuel injection valve

A fuel injection valve for internal combustion engines, having a valve body member axially displaceable in a bore of the valve body. The valve member has a sealing face with which the sealing face cooperates with a valve seat on the valve body. The valve body has at least one injection opening, which can be uncovered in a course of a valve member opening stroke motion only after a certain idle stroke has been excited and the valve sealing face has lifted from the valve seat. The injection opening is provided in the wall of the valve body and an inlet opening of the injection opening is closable by the valve member.

Fuel injection device for internal combustion engines

Fuel injection nozzle for internal combustion engines

A fuel injection valve for internal combustion engines, with an outward-opening valve member which, at one end projects out of a guide bore in a valve body. The valve has a valve head which acts as a closing member and on which is arranged a sealing face that cooperates with a valve seat on the valve body and which forms a sealing edge. For a variable injection cross section, a sleeve is attached onto the valve member on the region of the valve member located near the valve-member head, in which sleeve are provided a plurality of rows of injection orifices which can be opened in succession with an increasing opening stroke of the valve member. In order to allow a reliable and sealing guidance of the valve member, an inflow duct to the injection orifices is designed as a recess in the valve-member shank, in such a way that a web region guiding and sealing off the valve member in the sleeve remains.

Fuel-injection valve for internal combustion engines

The invention sets forth a fuel injection valve for internal combustion engines, having a valve body and an expansion sleeve that cooperates with the valve body. A pressure chamber is defined between the expansion sleeve and the valve body into which a high-pressure conduit discharges which can be made to communicate with an injection cross section into the combustion chamber of the engine via an opening cross section, openable at high pressure, between the expansion sleeve and the valve body. The cup-shaped expansion sleeve is slipped onto the circumferential jacket face of the valve body and braced axially against the valve body; a portion of the expansion sleeve is embodied as a fastening element on the valve body.

Injection nozzle for internal combustion engines

A fuel injection nozzle having an outwardly opening valve member, which is acted on in an opening direction by fuel pressure and in a closing direction by a closing spring. In order to control the opening characteristic curve of a stroke-dependently cleared injection cross section, an electrical actuator in the form of a piezo-electric stack or a magnetostrictive final control member is disposed in the nozzle holder, which actuator carries a collar on the valve member. The reciprocating motion of the valve member is limited in controlled fashion by shortening the length of the actuator.

A fuel injection nozzle for internal combustion engines that has a nozzle body with a valve seat disposed on the combustion chamber end and an outwardly-opening valve needle with a closing head, which has a closing cone that works together with the closing valve seat. At least one injection port is disposed in the closing head at an angle with respect to the axis of reciprocation of the valve needle, and is opened by a control edge on the nozzle body depending on the inlet pressure of the fuel. In order to minimize any deflection of the injection stream flowing out of the injection port relative to the alignment of the injection port, the port is divided into at least two parallel conduits, which are separated from each other by a dividing wall and which upon the opening stroke of the valve needle are unblocked one after the other by the control edge.

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Stuttgart, Germany

Detlev Potz