Lubricating system in 4-cycle engine

Details Lubricating system in 4-cycle engine Lubricating system in 4-cycle engine

F - Mech Eng,Light,Heat,Weapons

01

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F01M 1/04 (2006.01) F01M 9/06 (2006.01) F01M 11/02 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2207729

An oil reservoir chamber, a crank chamber and a valve operating chamber are provided in an engine body. The oil reservoir chamber and the crank chamber are in communication with each other through a through-hole. The crank chamber and the valve operating chamber are in communication with each other through a one-way valve which is opened upon an increase in pressure in the crank chamber. The valve operating chamber and the oil reservoir chamber are in communication with each other through orifices, so that an oil mist produced in the oil reservoir chamber is circulated to the oil reservoir chamber, the crank chamber, the valve operating chamber and the oil reservoir chamber by utilizing a pressure pulsing in the crank chamber. Thus, it is possible to perform the circulation of the lubricating oil without use of a special oil pump with any operative position of an engine.

Cette invention concerne un moteur à carter d'huile, caisson de vilebrequin et enceinte de mécanisme de commande de soupape séparés. Le carter d'huile communique avec le caisson de vilebrequin par un trou à passage intégral. Le caisson de vilebrequin et l'enceinte de mécanisme de commande de soupape communiquent ensemble via un clapet anti-retour qui s'ouvre lorsque la pression augmente dans le caisson de vilebrequin. L'enceinte de mécanisme de commande de soupape et le carter d'huile communiquent via des orifices de telle sorte que le brouillard d'huile produit dans le carter d'huile peut circuler dans ce carter, le caisson de vilebrequin, et l'enceinte de mécanisme de commande de soupape puis revenir au point de départ sous le seul effet des pulsations de pression dans le caisson de vilebrequin. Ainsi, la circulation de l'huile de lubrification peut être réalisée sans faire appel à une pompe d'huile dédiée, peu importe la position de montage du moteur.

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