Internal-combustion engines – Particular piston and enclosing cylinder construction – Cylinder detail
Patent
1986-11-03
1988-10-11
Feinberg, Craig R.
Internal-combustion engines
Particular piston and enclosing cylinder construction
Cylinder detail
123669, F02B 7702
Patent
active
047763094
ABSTRACT:
In a spark-ignition internal combustion engine of the type having a combustion chamber which presents at least one surface area on which there is applied at least one layer which presents to the combustion chamber a layer defining surface having very low reflectivity to electromagnetic waves in the wavelength range of about 0.2-7.0 microns. The layer reflects non-absorbed incident waves in a diffuse fashion, thereby to reduce the octane number requirement of the engine. The total surface area thus treated for each combustion chamber of the engine is equal to at least 10% of the top surface area of the piston in said chamber. The overall efficiency of the engine can be further improved when at least one of the layers has an underlying defining surface distal from the combustion chamber which reflects substantially all incoming electromagnetic waves in the wavelength range above 2.5 microns in a diffuse fashion.
REFERENCES:
patent: 3459167 (1969-08-01), Briggs et al.
patent: 3911891 (1975-10-01), Dowell
patent: 4254621 (1981-03-01), Nagumo
patent: 4538562 (1985-09-01), Matsui et al.
Comptes Rendues Acad. Sc. Paris, t. 261, 18 Oct. 1965, Group 6, pp. 3080, 3081.
Forslund Lennart
Niklasson Raoul
Wicen Jan
Feinberg Craig R.
Okonsky David A.
Oktan AB
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