Two-stage cycle engine and combustion chamber
A two stroke cycle internal combustion engine is described including a cylinder having an axis and closed at one end, a piston reciprocable in the cylinder and having a top wall movable into closely opposed relation with the cylinder closed end, and inlet and exhaust ports in the cylinder at substantially diametrically opposite locations and controlled by reciprocating motion of the piston, the cylinder closed end including a squish portion adapted to closely confront the piston top wall at its extreme upward position and a recess extending upward from a modified delta shaped base in the squish portion to form a combustion chamber cavity with an outer wall, an inner wall and two side walls, the outer wall rising with an inward slope from an arcuate edge of the base adjacent and parallel with the cylinder portion above the inlet port, the side walls rising from opposite angled edges of the base extending laterally and angularly inward from opposite ends of the arcuate edge toward a point near the exhaust port side of the cylinder, and the inner wall rising from a curved edge of the base joining the angled edges on the exhaust port side of the cylinder and passing closer to the cylinder axis than to the cylinder wall, the outer and inner walls curving upwardly inward and joining with the side walls to form a dome with a peak located laterally between the cylinder axis and the arcuate edge of the cavity base.
- Assignee:
- General Motors Corp., Detroit, MI (United States)
- Patent Number(s):
- US 5237972; A
- Application Number:
- PPN: US 7-982343
- OSTI ID:
- 6047348
- Resource Relation:
- Patent File Date: 27 Nov 1992
- Country of Publication:
- United States
- Language:
- English
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