Device for analyzing the step-by-step injection rate...

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

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F02M 65/00 (2006.01) G01F 9/00 (2006.01)

Patent

CA 2735534

The invention relates to a device that includes: a first chamber (3) for measuring a constant volume, and in which the fuel is injected; pressure (5a, 5b) and temperature (6) sensors associated with said first chamber (3); and a second measuring chamber (8) located downstream from the first, into which the fuel drained from the first chamber is sent. The volume of the second chamber (8) varies according to the movement of a piston (11), the movement of which is measured by means of a sensor (13). One or more additional measuring chambers (8a, 8b, 8n) of variable volumes are connected in parallel with the second chamber (8) and also receive the fuel drained from the first chamber (3), the volumes received in said different chambers being added up to obtain the total volume supplied for a single injection step. The device can be used for high injection rates.

Le dispositif comprend une première chambre de mesure (3) de volume constant dans laquelle est injecté le carburant, des capteurs de pression (5a, 5b) et de température (6) associés à cette première chambre (3), et une seconde chambre de mesure (8) située en aval de la première, dans laquelle est envoyé le carburant vidangé lors de la première chambre. Le volume de la seconde chambre (8) est variable selon le déplacement d'un piston (11) dans le déplacement est mesuré à l'aide d'un capteur (13). Une ou plusieurs chambres de mesure supplémentaires (8a, 8b,... 8n), de volume variable, sont montées en parallèle avec la seconde chambre (8) et reçoivent aussi le carburant vidangé lors de la première chambre (3), les volumes reçus dans ces différentes chambres étant additionnés pour obtenir le volume total délivré pour un coup d'injection. Ce dispositif s'applique aux gros débits d'injection.

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