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:
Sep. 08, 1998
Filed:
Apr. 22, 1997
Ryo Nagasaka, Nagoya, JP;
Yasushi Kohno, Kariya, JP;
Masaaki Konishi, Chiryu, JP;
Minoru Kondo, Chiryu, JP;
Katsumi Nakashima, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
An airflow amount measuring body is formed such that two pipes are arranged in parallel and a bypass passage having an inverted U-shape is provided. The passage sectional areas A1, A2 and A3 of an upstream side passage, a turning section and a downstream passage of the bypass passage are set as A1<A2 and A1<A3, more preferably A2/A1.gtoreq.1.14 and A3/A1.gtoreq.1.20 to suppress contraction flow. A venturi tube section is provided at the lower end of the flow amount measuring body at the peripheral wall of the venturi tube section at the downstream side. A passage enlarging section is provided at the part of the peripheral walls of the venturi tube section at the downstream side where the bypass flow joins, and a guide section for guiding the bypass flow is provided at an outflow port of the bypass passage.