Spark plug device and method of manufacturing spark plug device
AssigneeFederal-Mogul Ignition Company
InventorsWerner Niessner, Andreas Zeh
Life of this patent
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Abstract
A spark plug device that includes a spark plug and a sealing ring, and a method for producing the same. The spark plug may include a body, an insulator, a center electrode, and a ground electrode. The sealing ring is secured to the body in a captive fashion. A fastening section of the body has an outer diameter that is greater than an inner diameter of the sealing ring, which has been reshaped from a flat sealing ring blank into a conical sealing ring.
Claims10
A spark plug device, comprising:
- a spark plug that includes:
- a body that has an axial bore, a fastening section for fastening the spark plug to a cylinder head, and a sleeve sealing surface that is conical at least in some sections, the fastening section includes a fastening section outer diameter and a retaining groove that is embodied in the body and has a groove diameter that is smaller than the fastening section outer diameter;
- an insulator that has a longitudinal bore and is positioned at least partially inside the axial bore of the body;
- a center electrode that is positioned at least partially inside the longitudinal bore of the insulator;
- and
- a ground electrode that is mounted to the body;
- and
- a sealing ring that is secured to the body in a captive fashion and has an inner section and an inner diameter, wherein the sealing ring is reshaped into a conical sealing ring so that the inner section engages in the retaining groove and the inner diameter is smaller than the fastening section outer diameter.
A spark plug device, comprising:
- a spark plug that includes:
- a body that has an axial bore, a fastening section for fastening the spark plug to a cylinder head, and a sleeve sealing surface that is conical at least in some sections,
- an insulator that has a longitudinal bore and is positioned at least partially inside the axial bore of the body;
- a center electrode that is positioned at least partially inside the longitudinal bore of the insulator;
- and
- a ground electrode that is mounted to the body;
- and
- a sealing ring that has a first sealing surface and a second sealing surface, wherein the first sealing surface is conical at least in some sections and cooperates with the sleeve sealing surface, and the second sealing surface is designed to cooperate with a sealing surface of a cylinder head.
A method for producing a spark plug device, wherein the method comprises the following steps:
- preparing a spark plug that has a fastening section with a fastening section outer diameter and a retaining groove, the retaining groove has a groove diameter that is smaller than the fastening section outer diameter, and the spark plug also has a conical sealing surface;
- providing a sealing ring blank that has a center axis, two end surfaces, and a blank inner diameter, at least one of the two end surfaces is oriented essentially perpendicular to the center axis, and the blank inner diameter is greater than the fastening section outer diameter;
- sliding the sealing ring blank over the fastening section in an axial direction;
- and
- pressing the sealing ring blank against the conical sealing surface so that the sealing ring blank is reshaped into a sealing ring that has an inner section whose diameter is smaller than the fastening section outer diameter.
Dependencies are inferred from the claim text.