Abstract: A prechamber module for a laser spark plug, the prechamber module having a fastening region for the detachable fastening of the prechamber module to the laser spark plug. The prechamber module, in an end region, facing away from the combustion chamber, has a diaphragm arrangement, which borders on an inner chamber of the prechamber module in the axial direction, and has an orifice for the irradiation of laser radiation from the laser spark plug into the inner chamber of the prechamber module.

Abstract: A laser spark plug configured to be installed into a plug shaft of an internal combustion engine, and to focus laser ignition energy into the combustion chamber via combustion chamber-side, and thus proximal end, of the laser spark plug has, at a distal end of the laser spark plug opposite to the proximal end, a connecting unit for detachable mechanical and thermal connection to a cooler, the connecting unit being designed to permit the connecting and the disconnecting of the cooler when the laser spark plug is installed in the plug shaft.

Abstract: A laser spark plug is described, in particular for an internal combustion engine of a motor vehicle, having a combustion chamber window situated in an end area facing the combustion chamber. Arrangement is provided for cooling a volume region present in the area of the combustion chamber window and/or a medium present in the volume region. The cooling arrangement has a cooling body which has material having a relatively great thermal conductivity, in particular having a thermal conductivity of approximately 90 Watts per Kelvin and meter at room temperature or more. The cooling body is designed essentially annularly. An inner diameter of the cooling body in the area of a front side facing the combustion chamber of the cooling body is smaller than an inner diameter of the cooling body in the area of a front side of the cooling body facing away from the combustion chamber.

Abstract: A laser ignition device is provided for an internal combustion engine, having an ignition laser in which a combustion chamber window has an orifice plate arranged in front of it.

Abstract: A socket wrench is described for installing a laser ignition system in an internal combustion engine, the socket wrench including a drive section and an output section that are situated axially one after another. The output section has a longitudinal recess.

Abstract: A method for operating a laser device, which has a laser-active solid-state body including a preferably passive Q switch, in which pumped light is applied to the laser device in order to generate a laser pulse. The laser device and/or an optical link between the laser device and a pumped light source supplying the pumped light is at least partially acted upon by an optical test pulse in order to check the integrity of a/the optical link between the laser device and a pumped light source supplying the pumped light.

Abstract: A laser spark plug, e.g., for an engine, includes a prechamber that accommodates an ignitable medium, an arrangement for radiating laser radiation onto an ignition point in the prechamber, at least one crossflow channel that enables a fluid connection between an internal space of the prechamber and an external space, and a screen arranged between the radiating arrangement and the prechamber with an outlet opening for entry of the laser radiation into the prechamber. The at least one crossflow channel is arranged to provide a fluid flow therethrough and into the prechamber, such that the direction of flow forms an angle of a maximum of approximately 30° with a longitudinal axis of the prechamber, and the flow is directed into a spatial region of the prechamber that is situated essentially predominantly, preferably completely, outside a central region of the outlet opening of the screen.

Abstract: A laser spark plug, in particular for an internal combustion engine, includes a prechamber for accommodating an ignitable medium and means for applying laser radiation to an ignition point situated in the prechamber. The means are fashioned such that the laser radiation is focused onto at least one ignition point that, given a division of the prechamber into three partial regions that are approximately equal in volume and that extend axially away from an end face of the laser spark plug adjoining the prechamber and are separated from one another by imaginary planes situated essentially parallel to the end face, is situated in the partial region adjoining the end face or in a central partial region adjacent to said partial region, preferably in the partial region adjoining the end face.

Abstract: An ignition device, for an internal combustion engine of a motor vehicle, having a laser device for generating laser pulses, and having an optical fiber device which is at least optically connected to the laser device for supplying the laser device with pumped light. The optical fiber device is configured and situated in the region of the laser device such that radiation incident in the region of the laser device and/or in the region of a combustion chamber associated with the laser device is injected into the optical fiber device. The optical fiber device advantageously allow the radiation which is injected into the optical fiber device to be analyzed, using a detector which is remotely situated, without having to provide additional, separate optical fiber devices for the radiation to be analyzed, because is conducted directly via the same optical fiber that is already used for supplying pumped light.

Abstract: A laser ignition plug includes an antechamber into which the laser ignition plug is configured to irradiate laser radiation. The antechamber defines at least two overflow ducts that realize a fluid connection between the antechamber and a spatial region surrounding the antechamber. The at least two overflow ducts, with regard to one or more of (i) the radial spacing thereof from a longitudinal axis of the antechamber, (ii) the axial spacing thereof from an end region, which faces toward the combustion chamber, of the antechamber, and (iii) the alignment and/or geometry thereof, are arranged asymmetrically with respect to the longitudinal axis of the antechamber.

Abstract: A laser ignition device for an internal combustion engine, encompassing an ignition laser having a combustion chamber window, such that until startup of the laser ignition device, the combustion chamber window is equipped with a protective layer.

Abstract: An ignition laser is provided for an internal combustion engine, in which the combustion chamber window is connected to a housing of the ignition laser in a gas-resistant, pressure-resistant, and temperature-resistant manner. Furthermore, a pressure relief bore is present which effectively prevents a pressure increase in the housing of the ignition laser.

Abstract: A cooling device for a laser spark plug. The cooling has a radially inner first contact area which is developed to establish a thermal contact to a housing of the laser spark plug via at least one first radially inner contact surface. The cooling device also has a radially outer second contact area which is developed to establish a thermal contact to a heat sink, in particular to an inner wall of a spark plug hole receiving the laser spark plug, via at least one first radially outer contact surface. A connector is provided, which is developed to establish a thermal contact between the first contact area and the second contact area. The cooling device is developed at least in part elastically in order to allow for a relative movement in a generally radial direction between at least the first contact surface and the second contact surface.

Abstract: Laser spark plug for an internal combustion engine has at least one laser unit for guiding, shaping and/or generating laser radiation, further including a combustion chamber window, and a housing which has, on the opposite side of the combustion chamber window from the laser unit, an aperture for the passage of the laser radiation guided, shaped and/or generated by the laser unit into a combustion chamber, the length of the aperture being 4 mm or more.

Abstract: A laser spark plug device for an internal combustion engine includes a prechamber for receiving an ignitable medium and at least one overflow channel providing a fluid connection between an internal space of the prechamber and an external space surrounding the prechamber. The at least one overflow channel is configured such that when a fluid flows through the overflow channel into the internal space of the prechamber, the result is a fluid flow having at least one eddy which rotates on an eddy axis forming an angle of more than approximately 45° with a longitudinal axis of the laser spark plug device.

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.

Abstract: A laser spark plug for an internal combustion engine includes at least one element for guiding, shaping and/or generating laser radiation, a combustion chamber window and a housing. The housing has, on the opposite side of the combustion chamber window from the element, an aperture for the passage of the laser radiation guided, shaped and/or generated by the element into a prechamber disposed at the end of the housing on the combustion chamber side. At least one overflow channel is provided for a fluid connection between an internal space of the prechamber and a combustion chamber surrounding the prechamber. When a fluid flows into the internal space of the prechamber through the overflow channel, a fluid flow is obtained that enters the interior of the aperture at a minimum angle ?, in particular measured with respect to the longitudinal axis of the laser spark plug, of 45°.

Abstract: A laser spark plug for an internal combustion engine, including at least one generating arrangement for at least one of guiding, shaping and generating laser radiation, further including a combustion chamber window and a housing, in which the housing has, on the opposite side of the combustion chamber window from the at least one generating arrangement, in particular at an end of the housing on the combustion chamber side, an aperture for the passage of the laser radiation that is at least one of guided, shaped and generated by the at least one generating arrangement into a combustion chamber, the aperture having on the side thereof remote from the combustion chamber window an exit cross-section of 78 mm2 or less, especially 19 mm2 or less.

Abstract: In a method for operating a laser spark plug for a combustion engine, the laser spark plug having a precombustion chamber, within an operating cycle of the combustion engine, the laser spark plug irradiates an ignition location situated inside the precombustion chamber with a plurality of laser ignition pulses temporally offset from one another.

Abstract: A laser spark plug device for an internal combustion engine includes a prechamber for receiving an ignitable medium and at least one overflow channel providing a fluid connection between an internal space of the prechamber and an external space surrounding the prechamber. The at least one overflow channel is configured such that when a fluid flows through the overflow channel into the internal space of the prechamber, the result is a fluid flow having at least one eddy which rotates on an eddy axis forming an angle of more than approximately 45° with a longitudinal axis of the laser spark plug device.