Spark-ignited reciprocating piston engine having a subdivided co

Details Spark-ignited reciprocating piston engine having a subdivided co Spark-ignited reciprocating piston engine having a subdivided co

1996-03-18

1997-04-08

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

Chamber temperature control means

F02P 100

Patent

active

056178239

ABSTRACT:
An internal-combustion engine includes a cylinder having an upper, generally planar bounding surface formed by an inner wall portion of a cylinder head; a fuel injection device and a spark plug held in the cylinder head and opening into the cylinder; a piston axially slidably disposed in the cylinder; a combustion chamber defined between the upper bounding surface of the cylinder head and the top piston face when the piston is in its upper dead center position; and an annular ridge situated on the top piston face. The annular ridge subdivides the combustion chamber into an inner partial combustion chamber and an outer partial combustion chamber surrounding the inner partial combustion chamber. The inner partial combustion chamber is situated in an effective range of the fuel injection device and the spark plug. Further, throughgoing apertures are provided in the annular ridge for maintaining a continuous communication between the inner and outer partial combustion chambers.

REFERENCES:
patent: 1696799 (1926-12-01), Held
patent: 2505999 (1950-05-01), Smith
patent: 3315650 (1967-04-01), Bishop et al.
patent: 3797466 (1974-03-01), Nambu
patent: 4738227 (1988-04-01), Kamo et al.
patent: 5012777 (1991-05-01), Baker et al.
patent: 5322042 (1994-06-01), Di Priolo et al.
patent: 5329901 (1994-07-01), Onishi
patent: 5483933 (1996-01-01), Kawamura

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