Engine with sealing head seat ring
This patent describes in combination a diesel engine, a crankcase having a cylinder bank disposed at a substantial angle from vertical and supporting at least one cylinder head retainer with an annular upper surface sloping upwardly toward an edge at one side of the cylinder bank, a longitudinal wall extending inwardly and upwardly from adjacent the one side of the upper surface, and an exhaust passage opening into the head retainer on the one side, below the edge of the annular upper surface and the longitudinal wall, a cylinder head received in the retainer and including an exhaust outlet opening aligned within the head retainer with the crankcase exhaust passage and a radially extending flange having an annular lower surface above and in closely opposed relation to the retainer annular upper surface, oil lubricated mechanism disposed above the cylinder head and the longitudinal wall of the crankcase, and an annular metallic seat ring having annular lower and upper faces between and engaging the upper surface of the head retainer and the lower surface of the head flange to limit the wear thereof and seal the gap between them. The improvement consists of: a resilient seal portion on the seat ring outer periphery and including upper and lower annular beads respectively engaging in assembly the lower surface of the cylinder head flange and the upper surface of the head retainer to maintain a seal against the entry of lubricating oil into the interior of the head retainer and the exhaust passage even though adjacent metallic portions of the seat ring become worn in service.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4762103
- OSTI ID:
- 6730782
- Resource Relation:
- Patent File Date: Filed date 13 Nov 1987
- Country of Publication:
- United States
- Language:
- English
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