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Machine translation
1. (WO1999039187) METHOD AND DEVICE FOR OIL DETERIORATION DIAGNOSIS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1999/039187    International Application No.:    PCT/JP1998/000427
Publication Date: 05.08.1999 International Filing Date: 02.02.1998
Chapter 2 Demand Filed:    13.03.1998    
IPC:
G01N 21/31 (2006.01), G01N 21/35 (2006.01)
Applicants: HITACHI, LTD. [JP/JP]; 6, Kanda Surugadai 4-chome Chiyoda-ku Tokyo 101-8010 (JP) (For All Designated States Except US).
TAKEZAWA, Yoshitaka [JP/JP]; (JP) (For US Only).
ITOO, Yuuzoo [JP/JP]; (JP) (For US Only).
KATAGIRI, Junichi [JP/JP]; (JP) (For US Only)
Inventors: TAKEZAWA, Yoshitaka; (JP).
ITOO, Yuuzoo; (JP).
KATAGIRI, Junichi; (JP)
Agent: OGAWA, Katsuo; Hitachi, Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku Tokyo 100-8220 (JP)
Priority Data:
Title (EN) METHOD AND DEVICE FOR OIL DETERIORATION DIAGNOSIS
(FR) PROCEDE ET APPAREIL DE DIAGNOSTIC DE LA DETERIORATION DES CARBURANTS
Abstract: front page image
(EN)A method and a device for oil deterioration diagnosis with which the deterioration of oil is diagnosed by using an optical sensor in accordance with light transmission losses at two near-infrared wavelengths and with the loss difference between the two light transmission losses without the influences of the temperature change and the initial oil color.
(FR)La présente invention concerne un procédé et un dispositif utilisant un capteur optique pour diagnostiquer la détérioration des carburants, en fonction des pertes de transmission lumineuse au niveau de deux longueurs d'ondes infrarouges proches et de la différence des pertes lumineuses entre les deux pertes de la transmission lumineuse, sans prendre en considération les changements de température et de la couleur initiale du carburant.
Designated States: CN, JP, KR, US.
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)