Variable-geometry injection system with airflow regulated by...

Details Variable-geometry injection system with airflow regulated by... Variable-geometry injection system with airflow regulated by...

F - Mech Eng,Light,Heat,Weapons

23

R

F23R 3/26 (2006.01) F23N 1/02 (2006.01)

Patent

CA 2204591

The invention concerns a variable-geometry injection system with airflow regulated by engine rpm. Airflow regulation via the internal screw (7) associated with the fuel injector tip (4) supplied by an intake tube (3) is provided by a moveable obturator (14) mounted axially and displaced by bellows (20, 21, 23) connecting it with the intake tube (3) and with the tip (4). Fuel pressure P1 in the intake line acts on the bellows (20, 21, 23) to displace the obturator (14) axially between a position where the orifices of the screw (7) are blocked at low rpm and fully open at high rpm.

L'invention concerne un système d'injection à géométrie variable adoptant un débit d'air en fonction du régime moteur. Le réglage du débit d'air fourni par la vrille interne (7) associé à l'embout (4) de l'injecteur de carburant alimenté par un tube d'arrivée (3) est assuré par un obturateur (14) monté mobile axialement et porté par des soufflets (20, 21, 23) le reliant au tube d'arrivée (3) et à l'embout (4). La pression P1 du carburant dans la conduite d'arrivée agit sur les soufflets (20, 21, 23) pour déplacer axialement l'obturateur (14) entre une position d'obturation des orifices de la vrille (7) à bas régime et une position d'ouverture maximale à haut régime.

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