Internal-combustion engines – Precombustion and main combustion chambers in series – With injection means particularly positioned relative to...
Patent
1989-05-05
1991-04-23
Kamen, Noah P.
Internal-combustion engines
Precombustion and main combustion chambers in series
With injection means particularly positioned relative to...
123 59BS, 12365S, 123260, 123263, 123272, 123276, 123279, 123307, F02B 1900
Patent
active
050092073
ABSTRACT:
An internal combustion engine has a pair of first and second cylinders (12,14) communicating with a combustion chamber (20) the first cylinder having a larger swept volume than the second cylinder. First and second pistons (16,18) are provided in the cylinders. An inlet port is provided in the first cylinder for delivering a charge of unthrottled fuel while a fuel injector (36) is controlled by a control means (37) to deliver a charge of fuel into the second cylinder (14) as soon as possible after commencement of an induction stroke of the second piston. Movement of the fuel/air mixture from the second cylinder (14) into the combustion chamber (20) is prevented until the second piston (18) is at or near its inner dead center position. The second piston (18) may be formed as a protrusion on the crown of the first piston (16) with the second cylinder (14) being an extension of the first cylinder (12). The engine can be a compression ignition engine in which ignition takes place spontaneously in the combustion chamber, or alternatively a catalyst or hot surface ignition means can be provided in the combustion chamber.
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