Compressed natural gas cylinder pump and reverse cascade...

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

Patent

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Details

F02B 43/00 (2006.01) F02M 21/02 (2006.01) F17C 7/00 (2006.01)

Patent

CA 2309970

The invention relates to an apparatus and method for supplying high pressure gaseous fuel from a storage vessel to an internal combustion engine of a vehicle, or for other uses. A reverse cascade fuel supply apparatus for a vehicle comprising: (a) a storage tank for storing high pressure gaseous fuel; (b) an intermediate pressure accumulator for storing high pressure gaseous fuel, connected by a pipe to the storage tank; (c) a high pressure accumulator for storing high pressure gaseous fuel connected by a pipe to the intermediate accumulator and by a pipe to the storage tank; (d) a gaseous fuel compressing intensifier connected by a pipe to the storage tank, the intermediate pressure accumulator and the high pressure accumulator; and (e) a plurality of on-off pressure controlled valves located in the pipes connecting the storage tank, the intermediate accumulator, the high pressure accumulator and the intensifier, for enabling selective pumping to and withdrawal of high pressure gaseous fuel from the storage tank, the intermediate accumulator, the high pressure accumulator, the intensifier or the engine, according to a reverse cascade fuel supply program.

L'invention concerne un appareil et un procédé pour acheminer un carburant gazeux haute pression d'un récipient de stockage vers un moteur à combustion interne (56) d'un véhicule, ou pour d'autres usages. Un appareil d'alimentation en carburant en cascade inverse pour véhicule comprend: a) un récipient de stockage (2, 4, 6, 8) pour stocker un carburant gazeux haute pression; b) un accumulateur à pression intermédiaire (12), pour stocker un carburant gazeux haute pression, relié par un conduit au récipient de stockage; c) un accumulateur haute pression (10), pour stocker un carburant gazeux haute pression, relié par un conduit à l'accumulateur à pression intermédiaire (12) et par un conduit au récipient de stockage (2, 4, 6, 8); d) un multiplicateur de compression de carburant gazeux (24) relié par un conduit au récipient de stockage, à l'accumulateur à pression intermédiaire et à l'accumulateur haute pression; et e) une pluralité de robinets pressostatiques tout-ou-rien (V1, V2, V3, V4, V5, V6) disposés dans les conduits reliant le récipient de stockage, l'accumulateur à pression intermédiaire, l'accumulateur haute pression et le multiplicateur de compression, pour permettre un pompage ou retrait sélectif de carburant gazeux haute pression vers ou à partir du récipient de stockage, de l'accumulateur à pression intermédiaire, de l'accumulateur haute pression, du multiplicateur de compression ou du moteur, selon un programme d'alimentation en carburant en cascade inverse.

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