US 6,182,912 B2Granted

Fuel injection valve

AssigneeRobert Bosch GmbH

InventorsMartin Müller, Stefan Herold, Jochen Riefenstahl, Reinhold Brückner, Dirk Fischbach, Andreas Eichendorf, Martin Bühner, Rainer Norgauer, Jürgen Virnekäs, Peter Schramm, Hans Weidler, Christian Preussner, Thomas Keil, Oliver Kirsten, Ottmar Martin, Wolfgang Leuschner

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Abstract

A fuel injection valve, in particular a high-pressure injection valve for the direct injection of fuel into the combustion chamber of a compressed mixture, externally ignited internal combustion engine, has in a guide and seat area provided at the downstream end of the valve which area is formed by three disk-shaped elements. A swirl element is nested between a guide element and a valve seat element. The guide element, which can move radially in the assembled valve and which has an inner guide opening, serves to guide an axially movable valve needle which extends through it, while a valve closing section of the valve needle acts in concert with a valve seat surface of the valve seat element. The guide element is spring-loaded through a compression spring which acts upon it.

Claims17

Dependent claims

A fuel injection valve for a fuel injection system of an internal combustion engine, comprising:

an electromagnetic circuit;
a valve seat element;
a stationary valve seat situated on the valve seat element;
a valve needle axially moving along a longitudinal valve axis of the valve, the valve needle including a valve closing section, the valve closing section cooperating with the valve seat, the valve closing section opening and closing the valve;
a guide element situated upstream from the valve seat element, the guide element having an interior guide opening, the valve needle axially moving in the guide opening;
and
a compression spring acting on the guide element, the compression spring being situated with respect to the guide element such that a direction of action of the compression spring spring-loads the guide element toward the valve seat element.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/284,308Filed 27 Aug 1999
Priority: DE 197 36 68422 Aug 1997
Granted: 6 Feb 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F02M 51/0671
Having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering…:…
F02M 61/12
Other injectors with elongated valve bodies, i.e. of needle-valve type: characterised by the provision of guiding or centring means for valve bodies
F02M 61/162
Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14: means to impart a whirling motion to fuel…
F02B 2075/125
Other methods of operation: direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber