Adiabatic, two-stroke cycle engine having novel combustion chamb

Details Adiabatic, two-stroke cycle engine having novel combustion chamb Adiabatic, two-stroke cycle engine having novel combustion chamb

1998-07-20

2000-07-18

McMahon, Marguerite

Internal-combustion engines

Multiple cylinder

Cylinders having opposing heads

123 568, F02B 7526

Patent

active

060891955

ABSTRACT:
An engine structure and mechanism that operates on various combustion processes in a two-stroke-cycle without supplemental cooling or lubrication comprises an axial assembly of cylindrical modules and twin, double-harmonic cams that operate with opposed pistons in each cylinder through fully captured rolling contact bearings. The opposed pistons are double-acting, performing a two-stroke engine power cycle on facing ends and induction and scavenge air compression on their outside ends, all within the same cylinder bore. The engine includes a novel novel combustion chamber configuration comprising a semi-torus formed by a peripheral relief provided around the outer perimeter of each piston crown. This arrangement leaves a large central surface or squish land on each piston crown permitting a small piston clearance to be used for the purpose of generating a strong, radially-outward flow (squish) as the pistons approach each other in their cyclic motions. The cross-section of the toroidal space may be varied from point to point about the perimeter to provide improved entrance regions for the fuel injection.

REFERENCES:
patent: 4872433 (1989-10-01), Paul et al.
patent: 4898135 (1990-02-01), Failla et al.
patent: 5133306 (1992-07-01), Honkanen
patent: 5375567 (1994-12-01), Lowi, Jr.

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