Internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

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F02B 31/00 (2006.01) F02F 1/42 (2006.01) F02F 1/24 (2006.01)

Patent

CA 2321042

An internal combustion engine has an inlet port side angle (B) which is greater than 60~ and is preferably 101~ ~ 3~. The exhaust valve side angle (C) is preferably 93~ ~ 3~. The inlet valve seat (3) is located closer to the longitudinal axis (8) of the cylinder than the exhaust valve seat (4) and the imaginary line (16) which passes through the geometric centres of the valve seats (3, 4) is offset from the diameter (7) of the cylinder. This combination of characteristics gives an engine having a high specific power output, low specific fuel consumption, low emissions of carbon monoxide and unburnt hydrocarbons and a cool exhaust gas containing a significant volume of oxygen.

La présente invention concerne un moteur à combustion interne possédant un angle latéral (B) d'orifice d'admission supérieur à 60· et égal de préférence à 101· ± 3·. L'angle latéral (C) de la soupape d'échappement est de préférence égal à 93· ± 3·. Le logement de la soupape d'admission (3) est placé plus près de l'axe longitudinal (8) du cylindre que le logement de la soupape d'échappement (4) et la ligne imaginaire (16) qui passe à travers les centres géométriques des logements de soupape (3, 4) est décalé par rapport au diamètre (7) du cylindre. Cette combinaison de caractéristiques permet d'obtenir un moteur présentant une puissance spécifique élevée, une faible consommation de carburant spécifique, de faibles émissions de monoxyde de carbone et d'hydrocarbures imbrûlés, et un gaz d'échappement froid renfermant un volume d'oxygène significatif.

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