Internal-combustion engines – Combustion chamber – An acoustic cavity used to attenuate detonation shock waves
Patent
1986-10-06
1992-03-17
Dixon, Joseph L.
Internal-combustion engines
Combustion chamber
An acoustic cavity used to attenuate detonation shock waves
123660, F02F 324
Patent
active
050958690
ABSTRACT:
A reciprocating piston internal combustion engine is provided with a fixed volume air chamber located next to the working face of the piston and separated from the combustion chamber solely by a circumferential gap extending between the working face of the piston and the adjacent cylinder sidewall. The gap permits continuous controlled exchange of compression shock and expansion wave energy between the combustion and air chambers during a combustion reaction of fuel and air in the combustion chamber. The air chamber extends along a peripheral length of the piston and is provided with a radially inner sidewall including a generally sloping portion that extends from the piston side edge of the gap towards the bottom area of the air chamber, the inner sidewall characterized in that it is continuous and uninterrupted over the entire length of the air chamber and in that the sloping portion of the sidewall continuously diverges away from the adjacent cylinder sidewall over its respective length. A specific form of wedge-shaped cross sectional area of the air chamber is disclosed.
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Test Evaluation of Blaser Configured Laboratory Engine, by D. Steinmeyer et al., Aug. 1986.
Blaser Richard F.
Pouring Andrew A.
Dixon Joseph L.
Sonex Research Inc.
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