The invention relates to an ignition device for an internal combustion engine (10), in particular of a motor vehicle, having a laser device (26) which has a lasing solid body (44) and generates a laser beam (24), preferably in the form of a laser pulse, for radiation into a combustion chamber (14), wherein the laser device (25) is assigned focusing optics (52) for focusing the laser beam (24). According to the invention, the laser beam (24) has a beam profile which deviates from the circular shape. A pumped light source is provided for loading the laser device with pumped light. The beam profile of the laser beam and/or of the pumped light has a rectangular or linear shape and/or a circularly annular shape and/or a convex shape.

Ignition device for an internal combustion engine

The invention relates to an arrangement comprising an internal combustion engine ignition device (40) having a spark plug (50) and a spark plug seat (60) in which the spark plug (50) can be fastened in a fastening zone (7), and a cylinder head (17) in which the spark plug (50) is or can be mounted via the spark plug seat (60), the cylinder head (17) having a cylinder head cooling cavity (18). The spark plug seat (60) comprises a temperature control medium chamber (21) which is separate from the cylinder head cooling cavity (18) and has a medium feed line (12) and a medium discharge line (13), the temperature control medium chamber (21) and the cylinder head cooling cavity (18) being connected to separate medium temperature control devices (28, 29) and forming separate medium systems.

Internal combustion engine ignition device

The invention relates to a solid-state laser comprising a resonator (1) with a monolithic structure consisting of a laser medium, on which a passive Q-Switch (12) and at least one resonator mirror are directly formed, and comprising several laser diodes (22) which, as pump medium, radiate into the resonator (1) from the side A simple and robust structure which is also highly efficient is obtained, in that the monolithic resonator (1) is held at one end in a first holding plate (31) and is held at its other end in a second holding plate (32), and in that between the first and the second holding plate (31, 32) at least one carrier ring (21) is mounted which carries several laser diodes (22) which are passively wavelength stabilized

Solid-state laser comprising a resonator with a monolithic structure

The invention relates to a laser apparatus (26) for a laser ignition system (27) for an internal combustion engine (10), particularly a motor vehicle or a stationary motor, comprising a laser oscillator (26a), wherein the laser oscillator (26a) has a first laser-active solid body (44) and an optical Q-switch (46) and a partially reflecting output coupler (48) for a light (24) to be generated by the laser apparatus (26), characterized in that the laser oscillator (26a) has another partially reflecting mirror (42) for the light (24) to be generated by the laser apparatus (26).

Laser ignition system

A laser device of a so-called laser ignition is provided, in which the heat dissipation is improved between a combustion chamber window and a housing, and the cooling or temperature of the combustion chamber window is able to be adjusted within broad limits by simple modifications.

Laser device for the ignition device of an internal combustion engine

The device has a switched pumped solid laser with a light source, and a solid laser crystal enclosed in a resonator (9). A quality switch (4) increases power density, and a focusing device (7) focuses a laser beam into a combustion chamber. The source, resonator, crystal, switch, focusing device, an output mirror and a cooling device (11) that cools the resonator, are integrated into a single unit in a spark plug shaft of an engine.

Laser ignition device for combustion engine

The laser has a pulsed pumped light source (30) formed by pumping diodes (3). A solid laser crystal is enclosed into a resonator (9), and a quality switch increases power density. A focusing device (7) focuses a Peltier cooling section (12) to a cooling mechanism (11) for cooling the resonator. The mechanism has cooling systems, where the Peltier cooling section is assigned to one of the cooling systems for cooling the diodes.

Volker Mannheim

Papers

Laser ignition device for combustion engine

Q-switched pumped solid-state laser