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:
Feb. 10, 1998
Filed:
Feb. 27, 1995
Hiroshi Aoi, Atsugi, JP;
Masao Tsukada, Atsugi, JP;
Unisia Jecs Corporation, Atsugi, JP;
Abstract
In an apparatus for detecting airflow quantity applicable to a vehicular internal combustion engine, a slit is formed so that an insulating substrate is partitioned into a main substrate portion and a sub substrate portion. A first temperature sensitive resistor, a heat generated main resistor 31, and a second temperature sensitive resistor are formed on the main substrate portion in film forms in the order with respect to the forward air stream direction (A). A difference in the resistance values of the first and second temperature sensitive resistors 32 and 33 detects the air stream direction and detects the flow quantity according to a temperature variation (namely, the variation in resistance value) in the heat generated temperature sensitive main resistor due to the cooling caused by the intake air.