Air-cooled internal combustion engine having canted...

Details Air-cooled internal combustion engine having canted... Air-cooled internal combustion engine having canted...

F - Mech Eng,Light,Heat,Weapons

02

B

F02B 75/16 (2006.01) F01B 1/01 (2006.01) F02F 1/22 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2211551

An air-cooled internal combustion engine, a crankshaft and a camshaft rotatably journalled in the crankcase parallel to one another, and a cast intake valve chamber and cast exhaust valve chamber each cast integrally with the cylinder and communicating with the combustion chamber via a respective intake valve port and exhaust valve port. Intake and exhaust valves are disposed for reciprocation in a direction lying perpendicular to the camshaft and simultaneously in a direction lying at an acute angle to a plane passing through the longitudinal axis of the cylinder and parallel to the axis of the camshaft. An intake cross-over manifold is cast integrally with the cylinder and is delimited by interior walls which are substantially straight in longitudinal direction from a fuel/air intake port to a point of intersection with the intake valve chamber.

Cette invention concerne un moteur à combustion interne refroidi par air, à vilebrequin et arbre à cames parallèles, à chambre d'admission et chambre d'échappement coulées à même le bloc-cylindres et communiquant avec la chambre de combustion respectivement par une lumière d'admission et une lumière d'échappement. Les soupapes d'admission et d'échappement sont disposées avec leur axe longitudinal perpendiculaire à l'arbre à cames et en même temps incliné selon un angle aigu par rapport à un plan coupant l'axe longitudinal du bloc-cylindres et parallèle à l'axe de l'arbre à cames. Un collecteur d'admission transversal coulé à même le bloc-cylindre est délimité par des parois intérieures sensiblement rectilignes entre la lumière d'admission de mélange air-carburant et le point d'intersection de la chambre d'admission.

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