Robert Boschgmbh

Guido Pilgram

Norbert Keim

Detlef Nowak

Michael Lingner

Markus Gesk

Manfred Roessler

Achim Degel

Rolf Keller

Bernd Einwiller

Martin Maier

Klaus Ries-Mueller

Joerg Heyse

Uwe Liskow

Juergen Raimann

Rainer Norgauer

Thilo Beckmann

Axel Heinstein

Martin Buehner

Christian Preussner

Thomas Sebastian

Stefan Arndt

Andreas Eichendorf

Klaus Noller

Johann Bayer

Volker Holzgrefe

Ralf Kromer

Stefan Lauter

Hartmut Albrodt

Juergen Maier

Ulrich Fischer

Rainer Ecker

Ralf Trutschel

Axel Storch

Robert Koehler

Jens Botte

Martin Kochanowski

Stefanie Capek

Manfred Stuerz

A valve for metering highly pressurized fluid, having an inlet connector that can be placed into a connection socket of a fluid supply line, and a sealing assembly situated on the inlet connector, the sealing assembly having an elastically deformable sealing ring and a support ring made of plastic, which sealing assembly is supported on a radial support shoulder present on the inlet connector and seals against the connection socket. To prevent radial gaps between the support ring on the one hand and the inlet connector and/or the connection socket on the other hand, into which gaps the sealing ring extrudes under high pressure and becomes damaged, the support ring situated between the sealing ring and the support shoulder is made of an elastically deformable plastic material.

Valve for the metering of highly pressurized fluid

A method for installing a sealing ring in a ring groove of an injector, in particular a fuel injector, in which the diameter of the sealing ring is enlarged with the aid of an enlarging tool and is inserted into the ring groove, and the enlarged sealing ring accommodated in the ring groove is reshaped to a predefined sealing dimension with the aid of a calibration tool. For the purpose of shifting a residual ring gap remaining in the ring groove during the reshaping process to the groove flank of the ring groove facing away from the combustion chamber, the reshaping process of the sealing ring is carried out by removing the calibration tool from the fuel injector.

Method for installing a sealing ring

A valve for injecting fuel, including a valve positioning element, an armature connected to the valve positioning element, a stop that limits a movement of the armature, and a damping element provided between the armature and the stop, the damping element being applied as a damping layer on at least one part of the armature and/or on at least one part of the stop.

Valve for injecting fuel

A fuel injector configured as a high-pressure injection valve for the direct injection of fuel into a combustion chamber includes: a housing having an housing end face on the combustion chamber side; an actuator; a valve-closure member operable by the actuator; at least one outlet orifice in the housing end face on the combustion chamber side for the fuel, the valve-closure member selectively closing or opening the outlet orifice; and a ring provided round about the outlet orifice in the housing end face on the combustion chamber side.

Fuel injector

A fuel injection valve includes: a magnetic coil; an armature; and a valve needle connected to the armature for actuating a valve closing body which forms, together with a valve seat surface, a seal seat. Formed downstream from the valve seat surface is a spray opening that has, at the transition from a first to a second spray opening segment, a tear-off edge such that the complete opening angle of the spray opening at the tear-off edge is greater than 270&#xb0; over the entire circumferential tear-off edge, so that, going out from the tear-off edge, on the floor of the second spray opening segment of the spray opening, there extends a circumferential floor region that is recessed behind the transition plane in which the tear-off edge is situated.

Injection valve

A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.

Fuel injection valve

A fuel injector for fuel-injection systems of internal combustion engines has a solenoid coil; a valve needle that is operatively connected to the solenoid coil and acted upon by a restoring spring in a closing direction, in order to actuate a valve-closure member which, together with a valve-seat surface formed at a valve-seat member, forms a sealing seat; and at least two spray-discharge orifices which are formed in the valve-seat member. The spray-discharge orifices are formed in the valve-seat member in such a way that they are shielded from mixture flows circulating in a combustion chamber of the internal combustion engine.

In a method for operating an internal combustion engine of a motor vehicle, in particular, pressurized fuel is conveyed to a fuel accumulator. The fuel is injected into a combustion chamber via a fuel injector. Coking of the fuel injector is determined. A first fuel-pressure increase is implemented when the coking exceeds a threshold value.

Method for operating an internal combustion engine of a motor vehicle in particular

A fuel injection system for GDI internal combustion engines, which has a second injection valve in the intake tube, and a method for operating this fuel injection system. By injecting fuel into the intake tube at intervals by means of the second injection valve, the formation of deposits in the intake tube and on the inlet valve, which are produced due to the recirculation of exhaust gas through the exhaust recirculation tube, can be prevented and possibly existing deposits can be broken down.

Fuel injection system for internal combustion engines with gasoline direct injection, which includes optional injection into the intake tube, and method for operating it

A fuel injector, particularly a fuel injector for fuel injection systems in internal combustion engines, has a valve needle, which cooperates with a valve-seat surface to form a sealing seat, and an armature, which engages with the valve needle, the armature being movable along the axis of the valve needle and being damped by a damping element made from an elastomer. In this context, a first intermediate ring is situated between the armature and the damping element. The damping element rests on the flange, which is connected in a force-locking manner to the valve needle. The intermediate ring and/or the flange is furnished with radial and/or axial channels which connect an interior volume located between the valve needle and the damping element to a central cutaway of the fuel injector.

A fuel injection valve for a fuel injection system of an internal combustion engine, in particular for injecting fuel directly into the combustion chamber of the internal combustion engine. The fuel injection valve has a magnet coil, an armature that can be pulled by the magnet coil in a direction of lift against a first return spring, and a valve needle. The valve needle has a first stop surface for the armature, which can be moved relative to the valve needle. The armature is acted upon by a second return spring. In addition, a stationary second stop surface for the armature is provided. The second return spring acts upon the armature in a direction opposite to the lift and in an inoperative position, when the magnet coil is not energized, and holds the armature in contact with the second stop surface so that a distance between the armature and the first stop surface provided on the valve needle is predefined.

A thermal insulating sleeve for a fuel injection valve, which can be inserted in a mounting hole of a cylinder head of an internal combustion engine, has a sleeve body which at least partially envelops a nozzle body of the fuel injection valve. At the injection end of the sleeve body there is a folded-back section, in which the sleeve body has a two-layered configuration, and there is a conical section, which tapers in the direction toward the injection end and which in the assembled state fits tightly against the tapered section of the nozzle body.

Thermal insulating sleeve

Growing community of inventors

Schwieberdingen, Germany

Guido Pilgram