Laser ignition for gas mixtures
AssigneeMultitorch GmbH
InventorsDieter Kuhnert, Maurice Kettner, Georg Maul
Life of this patent
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Abstract
An ignition device for the ignition of a gas mixture in a main combustion chamber (1), in particular of an internal combustion engine, is proposed, wherein the absorber body (5) is heated by means of a laser (8). A prechamber (10) is located upstream of the absorber body (5) on the combustion chamber inner side (6) in order to improve the ignition behaviour.
Claims17
An ignition device for the ignition of a combustible or explosive gas mixture in a main combustion chamber (1), in particular for the ignition of a fuel-air mixture or a combustion gas-air mixture in an internal combustion engine, comprising
- a high temperature-resistant absorber body (5), which is arranged in contact with gas mixture coming from the main combustion chamber (1), with a combustion chamber inner side (6) facing the gas mixture, and
- a light guide path for guiding a laser beam (7) onto the absorber body (5) in order to heat the absorber body (5) with the laser beam (7) until an ignition temperature (TZ) required for the ignition of the gas mixture is reached on the combustion chamber inner side (6) of the absorber body (5),
- wherein the light guide path up to the absorber body (5) is configured in such a way that the laser beam (7) does not have direct contact with the gas mixture of the main combustion chamber (1),
- wherein
- a prechamber (10) with at least one overflow opening (11) connecting the prechamber (10) and the main combustion chamber (1) is located upstream of the absorber body (5) on the combustion chamber inner side (6), wherein
- the combustion chamber inner side (6) of the absorber body (5) is facing the gas mixture of the prechamber (10) and
- the light guide path up to the absorber body (5) is configured in such a way that the laser beam (7) does not have direct contact with the gas mixture of the prechamber (10).
An internal combustion engine, in particular a petrol engine or gas engine, characterised in that it comprises an ignition device according to any one of the preceding claims.
A method for the ignition of a combustible or explosive gas mixture in a main combustion chamber (1), of a fuel-air mixture or a combustion gas-air mixture in an internal combustion engine, the method comprising
- contracting a high temperature-resistant absorber body (5) with a combustion chamber inner side (6) facing the gas mixture with gas mixture coming from the main combustion chamber (1), and
- guiding a light beam (7) along a light guide path onto the absorber body (5), wherein the absorber body (5) is heated with the laser beam (7) until an ignition temperature (TZ) required for the ignition of the gas mixture is reached on the combustion chamber inner side (6) of the absorber body (5), the light guide path up to the absorber body (5) being configured in that the laser beam (7) does not have direct contact with the gas mixture of the main combustion chamber (1),
- wherein
- a prechamber (10) with at least one overflow opening (11) connecting the prechamber (10) and the main combustion chamber (1) is located upstream of the absorber body (5) on the combustion chamber inner side (6),
- the combustion chamber inner side (6) of the absorber body (5) is arranged facing the gas mixture of the prechamber (10) and
- the light guide path up to the absorber body (5) is configured in order that the laser beam (7) does not have direct contact with the gas mixture of the prechamber (10).
Dependencies are inferred from the claim text.