Spark plug device and method for operating a spark plug device

Abstract

Spark plug device (1) for an internal combustion engine, comprising at least one spark plug (2) with at least one electrode (3) and at least one ground electrode device (4), and comprising at least one pre-chamber device (5) for providing at least one pre-chamber (15), wherein the electrode (3) projects at least partially into the pre-chamber (15) with an ignition end (13), and wherein the pre-chamber device (5) has at least one passage device (6) for supplying the pre-chamber (15) with a combustion mixture and / or for flame exit from the pre-chamber (15), characterized in that the pre-chamber (15) is assigned a residual gas separation device (7), which separates the pre-chamber (15) by means of at least one skirt element (17), which is arranged closer to an exit point (22) of the electrode (3) from a plug body (12) of the spark plug (2) than to the ignition end (13) and / or than to the ground electrode device (4),divided into at least one ignition chamber (25) and at least one residual gas chamber (35), and that by means of the residual gas separation device (7), a residual gas remaining in the prechamber (15) can be pressed at least partially into the residual gas chamber (35) by a combustion mixture flowing into the prechamber (15).

Claims

[1] Spark plug device (1) for an internal combustion engine, comprising at least one spark plug (2) with at least one electrode (3) and at least one ground electrode device (4) and comprising at least one pre-chamber device (5) for providing at least one pre-chamber (15), wherein the electrode (3) projects with an ignition end (13) at least partially into the pre-chamber (15) and wherein the pre-chamber device (5) has at least one passage device (6) for feeding the pre-chamber (15) with a combustion mixture and / or for flame exit from the pre-chamber (15), characterized byin that the prechamber (15) is assigned a residual gas separation device (7), which divides the prechamber (15) into at least one ignition chamber (25) and at least one residual gas chamber (35) by means of at least one apron element (17), which is arranged closer to an exit point (22) of the electrode (3) from a plug body (12) of the spark plug (2) than to the ignition end (13) and / or than to the ground electrode device (4), and in that by means of the residual gas separation device (7) a residual gas remaining in the prechamber (15) can be pressed at least partially into the residual gas chamber (35) by a combustion mixture flowing into the prechamber (15). [2] Spark plug device (1) according to the preceding claim, wherein the ignition end (13) is arranged in the ignition chamber (25) and outside the residual gas chamber (35) and wherein the residual gas chamber (35) is arranged downstream of the ignition chamber (25). [3] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) radially surrounds the electrode (3) at least in sections. [4] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) is arranged downstream of the ignition end (13) and / or the ground electrode device (4). [5] Spark plug device (1) according to one of the preceding claims, wherein the ignition end (13) is fastened to a support section (23) of the electrode (3) projecting from the plug body (12) and wherein the skirt element (17) radially surrounds the support section (23) at least in sections. [6] Spark plug device (1) according to one of the preceding claims, wherein the passage device (6) opens into the ignition chamber (25). [7] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) is circumferentially closed. [8] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) is designed as a disc (27). [9] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) is arranged radially spaced from the electrode (3). [10] Spark plug device (1) according to one of the preceding claims, wherein the skirt element (17) bears with its radial outer side against the pre-chamber device (5). [11] Spark plug device (1) according to one of the preceding claims, wherein the residual gas space (35) has a volume many times smaller than the ignition space (25). [12] Spark plug device (1) according to one of the preceding claims, wherein the passage device (6) has a plurality of through holes (16) with a tangential hole arrangement. [13] Spark plug device (1) according to one of the preceding claims, wherein the pre-chamber device (5) is designed as a pre-chamber cap (45) that can be fastened to the spark plug (2) or at least comprises such a cap and / or wherein the pre-chamber device (5) is provided by a wall section of the internal combustion engine. [14] Method for operating a spark plug device (1) according to one of the preceding claims, wherein with the residual gas separation device (7) a residual gas remaining in the prechamber (15) is pressed at least partially behind the skirt element (17) into the residual gas space (35) by a combustion mixture flowing into the prechamber (15).

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