Laser-induced spark ignition for an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsPascal Woerner, Juergen Raimann, Joerg Engelhardt, Martin Weinrotter
Life of this patent
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Abstract
A laser spark plug for an internal combustion engine has at least one laser unit for guiding, shaping, and/or for producing laser radiation, a combustion chamber window, and a housing which has, at the side of the combustion chamber window situated opposite the laser unit, a screen for the passage of the laser radiation guided, shaped, and/or produced by the laser unit into a combustion chamber, the screen having a first end facing the combustion chamber and a second end facing away from the combustion chamber, the inner contour of the screen having an extremal cross-section in a region that is situated at a distance both from the first and second ends.
Claims9
A laser spark plug for an internal combustion engine, comprising:
- at least one laser unit for at least one of producing, shaping, and guiding laser radiation;
- a combustion chamber window;
- and
- a housing having a screen at an end of the housing on the combustion chamber side, the screen being on the opposite side of the combustion chamber window from the laser unit, wherein the screen facilitates passage of the laser radiation from the laser unit into a combustion chamber, wherein the screen contains a passageway, which is limited radially by an inner contour of the screen, and wherein the screen has a first end facing the combustion chamber and a second end facing away from the combustion chamber, the inner contour of the screen having an extremal cross-section in a region situated at a distance both from the first end of the screen facing the combustion chamber and from the second end of the screen facing away from the combustion chamber.
Dependencies are inferred from the claim text.