Injection nozzle and a method for forming a fuel-air mixture
AssigneeDaimlerChrysler AG
InventorsDietmar Bertsch, Martin Bezner, Uwe Schaupp, Helmut Schorn, Jörg Sievert
Life of this patent
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Abstract
A cylinder head for an internal combustion engine includes a spark plug 3, provided in combustion chamber 2, and an injection nozzle 1 that has a housing end face 27 and a closure element 6 which is movable by an actuator and has a closure member 10, the housing end face 17 of the injection nozzle 1 forming a common, planar surface with the closure member 10 in the closed state of the injection nozzle 1.
Claims17
A cylinder head for an internal combustion engine, comprising:
- a spark plug arranged in a combustion chamber;
- and
- an injection nozzle having a housing end face and a closure element, the closure element being movable by an actuator and having a closure member;
- wherein the closure member includes a conical sealing surface configured to seal a nozzle opening and a cone-shaped lateral surface directed toward the combustion chamber, wherein a generatrix of the conical sealing surface of the closure member extends tangentially with respect to a curve-shaped part of a housing wall;
- and
- wherein the housing end face of the injection nozzle forming a common planar surface with the closure member in a closed state of the injection nozzle.
A method for forming an ignitable fuel-air mixture in a combustion chamber of a direct-injection internal combustion engine having an injection nozzle, the injection nozzle having a housing end face, the injection nozzle including a closure member, the method comprising the steps of:
- introducing a fuel into the combustion chamber via the injection nozzle in at least two partial quantities;
- and
- moving the injection nozzle into a closed position after introducing each partial quantity;
- wherein in the closed state of the injection nozzle, the housing end face of the injection nozzle forms a common planar surface with the closure member;
- and
- wherein the closure member includes a conical sealing surface configured to seal a nozzle opening and a cone-shaped lateral surface directed toward the combustion chamber, and wherein a generatrix of the conical sealing surface of the closure member extends tangentially with respect to a curve-shaped part of a housing wall.
Dependencies are inferred from the claim text.