Hydraulically driven pump-injector with multistage pressure...

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

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F02M 47/00 (2006.01)

Patent

CA 2574639

Hydraulically driven pump-injector for internal combustion engines primarily for diesels, wherein in order to considerably increase the pressure multiplication coefficient for achieving super-high injection pressures (2500 Bar and higher) and decreasing the pump-injector diameter or reducing the pressure of the actuating fluid, a multistage pressure intensifier is installed in the pump-injector, comprising a tandem of successive stages, each stage comprising an intermediate piston (3), above which a working cavity (12) is formed, to which the actuating fluid is expulsed by a pushrod (4) driven by the previous piston.

L'invention concerne un injecteur pompe à commande hydraulique pour moteurs à combustion interne, principalement pour moteurs diesels, dans lequel afin d'augmenter considérablement le coefficient de multiplication de pression pour atteindre des pressions d'injection super élevées (2500 bars et plus) et pour diminuer le diamètre de l'injecteur pompe ou réduire la pression du fluide de travail, un multiplicateur de pression multi-étagé est installé dans l'injecteur pompe, lequel comprend un tandem d'étages successifs, chaque étage comprenant un piston intermédiaire (3) au-dessus duquel une cavité de travail (12) est formée et vers laquelle le fluide de travail est expulsé par une tige de poussée (4) entraînée par le piston précédent.

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