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:
Jun. 14, 2005
Filed:
Oct. 16, 2002
Atsushi Kanke, Hitachi, JP;
Kohei Sakurai, Hitachi, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Nobuyasu Kanekawa, Hitachi, JP;
Atsushi Kanke, Hitachi, JP;
Kohei Sakurai, Hitachi, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Nobuyasu Kanekawa, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An air flow meter which can decrease the error due to the backflow. Throttle valvewhich opens and shuts the air intake passage is installed in the air intake passage of the internal combustion engine. The first sensor partis installed in the air intake passage in the upstream of throttle valveFurther, the second sensor partis installed in the air intake passage in the downstream of throttle valvePulsation compensating meanscorrects the pulsation of the air flow rate signal detected by the first sensor part by using the output signals of the first and the second sensor partsbased on each cylinder of the internal combustion engine.