The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2003
Filed:
May. 15, 2000
Taku Murakami, Yamato, JP;
Ichio Ichikawa, Sagamihara, JP;
Haruo Hashimoto, Kamakura, JP;
Koji Iijima, Hiratsuka, JP;
Fumihide Sato, Oyama, JP;
Hiroshi Ohkawa, Oyama, JP;
Komatsu, Ltd., Tokyo, JP;
Abstract
A life estimation device which numerically measures the damage to a machine such as an engine accurately to estimate, the life of the machine accurately without requiring skill. A load map (B) of the two-dimensional distribution of the operation parameters of an engine is made. In accordance with the weighted integration time &agr;i·ki at each level (Bi) of the load map (B), the actual damage &dgr;=&Sgr;&agr;i·ki to the engine for a certain lapse of time &tgr; is calculated. By operating the engine beforehand, a correspondence relation L between the magnitude of the damage &dgr; and the life H is predetermined. The life H corresponding to the calculated actual damage &dgr; is determined in accordance with the predetermined correspondence relation L and the H is outputted as the estimated life of the engine.