B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
B60K 6/12 (2006.01) F15B 1/04 (2006.01)
Patent
CA 2600321
A lightweight, low permeation, piston-in-sleeve high-pressure accumulator is provided. The accumulator includes a cylindrical composite pressure vessel with two integral rounded ends. A piston slidably disposed in a thin nonpermeable internal sleeve in the accumulator separates two chambers, one adapted for containing a working fluid and the other adapted for containing gas under pressure. Working fluid is provided in a volume between the nonpermeable internal sleeve and the composite pressure vessel wall. Further means are provided for withstanding harmful effects of radial flexing of the composite vessel wall under high pressures, and from stresses present in use in mobile applications such as with a hydraulic power system for a hydraulic hybrid motor vehicle. A method for pre-charging the device is also presented.
La présente invention concerne un accumulateur haute pression léger à piston sous chemise à faible perméation. Il comprend un récipient pressurisé composite cylindrique avec deux extrémités arrondies faisant corps. Un piston disposé coulissant dans une chemise interne mince non perméable dans l'accumulateur sépare deux chambres, l'une conçue pour contenir un fluide de travail, l'autre conçue pour contenir du gaz pressurisé. Le fluide de travail est confiné dans un volume entre la chemise interne non perméable et la paroi composite du récipient pressurisé. D'autres organes permettent de résister aux effets néfastes du fléchissement radial de la paroi composite sous les hautes pression, et à ceux des contraintes inhérentes aux utilisations dans des applications mobiles telles que les systèmes d'assistance hydraulique destinés aux automobiles hybrides hydrauliques. L'invention concerne également un procédé de précharge du dispositif.
Gray Charles L.
Moskalik Andrew J.
Ridout & Maybee Llp
U.s. Environmental Protection Agency
LandOfFree
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