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:
May. 15, 2001
Filed:
Nov. 20, 1998
Applicant:
Inventors:
Katsuaki Uchiyama, Kanagawa-ken, JP;
Katsuhiko Kawamura, Kanagawa-ken, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 1/900 ; G01L 3/26 ;
U.S. Cl.
CPC ...
G01M 1/900 ; G01L 3/26 ;
Abstract
An abnormality diagnosis apparatus of an engine cooling system includes a cooling water temperature sensor,for detecting a cooling liquid temperature. A control unit,calculates a rise value of the cooling liquid temperature in a measuring section, and judges a liquid temperature convergence time at which the rise value of the cooling liquid temperature in the measuring section becomes smaller than a predetermined value, and if the cooling liquid temperature, when the liquid temperature is converged, is lower than a criteria value, the apparatus diagnoses that an abnormality is generated in the cooling system.