Ignition unit for internal combustion engine
AssigneeRobert Bosch GmbH
InventorDieter Betz
Life of this patent
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Abstract
An arrangement for mounting an ignition coil on the cylinder head of internal combustion engines. Threaded bolts extend from the cylinder head. The thread having a substantially saw tooth cross section with the thread flank facing away from the cylinder head at an acute angle and the thread flank head oriented substantially normal to the axis of the bolt. The ignition coil, which for this purpose is provided with a bore, may be slipped onto the bolt and a fastener provided with a resiliently expansible locking member may thereafter be slipped onto the bolt.
Claims9
Apparatus for mounting an ignition coil having a bore extending therethrough, on the cylinder head of an internal combustion engine, and said apparatus comprises:
- an elongate bolt extending from a predetermined surface of the cylinder head along a predetermined axis;
- a fastener for securing said ignition coil on said bolt, said fastener being adapted to be inserted into the bore of the ignition coil and having an axially extending recess therein adapted to receive said bolt;
- a groove formed in one of said bolt and said recess;
- and
- locking means radially movable and resiliently biassed in radial direction engageable in said groove, thereby locking the fastener means against axial movement away from the cylinder head;
- and wherein
- said locking means are rotationally movable relative to the groove means to radially release the engagement and thereby unlocking the fastener.
Dependencies are inferred from the claim text.