Evaporative fuel discharge-preventing device for engine

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

Patent

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F02M 33/02 (2006.01) F02M 25/08 (2006.01)

Patent

CA 2149466

An evaporative fuel discharge-preventing device for an engine which comprises a surge tank for leveling out fluctuations in the amount of evaporated fuel so as to provide a stabilized engine rotational speed, and to prevent the impairment of drivability. The surge tank has outlet and inlet side pipes arranged at a height position to avoid storing the evaporated fuel in a liquid state within the surge tank. The surge tank, having a predetermined volumetric capacity, is disposed midway of an air communication passage between an intake manifold and a purge valve, and is located at a height position greater than the intake manifold.

Dispositif servant à prévenir les fuites de carburant volatil dans un moteur et comportant un réservoir intermédiaire servant à amortir les fluctuations quantitatives de carburant évaporé et ainsi assurer la stabilité du régime moteur et éviter les effets néfastes de ces éventuelles fluctuations sur la conduite. Les canalisations latérales d'entrée et de sortie du réservoir intermédiaire sont placées à une hauteur calculée pour empêcher l'accumulation sous forme liquide de carburant évaporé. Le réservoir, de capacité déterminée, est placé dans une canalisation d'air entre un collecteur d'admission et une soupape de purge, à une hauteur supérieure à celle du collecteur d'admission.

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