EP 1069312 A1 20010117 - Method and device for the evalution of a hydraulic system
Title (en)
Method and device for the evalution of a hydraulic system
Title (de)
Verfahren und Vorrichtung zum Auswerten eines hydraulischen Systems
Title (fr)
Procédé et dispositif d'évaluation d'un système hydraulique
Publication
Application
Priority
NL 1012606 A 19990715
Abstract (en)
To evaluate the state of a hydraulic system, particularly a hydraulic aircraft system, one determines, with the system at rest and the pump (8) operating, at inlet (6), outlet (12) and leak outlet (18) of the pump temperature and pressure at those places with the pump operating as a pump with external leak outlet, while measuring the leak flow and operating the pump as a pump with internal leak return, and determines, using the known thermodynamic equations for these states, the pump efficiency and the system leak flow respectively. <IMAGE>
IPC 1-7
IPC 8 full level
F04B 51/00 (2006.01)
CPC (source: EP)
F04B 51/00 (2013.01)
Citation (search report)
- [Y] US 5628229 A 19970513 - KRONE JOHN J [US], et al
- [A] FR 2372422 A1 19780623 - HOFFLINGER WERNER [DE]
- [A] DE 2557044 A1 19770623 - HOEFFLINGER WERNER [DE]
- [DY] WITT K.: "Thermodynamisches Messen in der Ölhydraulik", ÖLHYDRAULIK UND PNEUMATIK, vol. 20, no. 3 e.v., 1 September 1976 (1976-09-01) - 1 January 1978 (1978-01-01), Mainz, pages 20.603 - 22.36, XP002131924
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00202417 A 20000707; NL 1012606 A 19990715