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:
Mar. 05, 2013
Filed:
Jul. 19, 2010
Applicant:
Hiroshi Yamashita, Anjo, JP;
Inventor:
Hiroshi Yamashita, Anjo, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 19/00 (2011.01); F02M 25/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An engine has a PCV passage connected to an intake system for recirculating a blow-by gas to the intake system and an air flow meter provided upstream of a connection between the PCV passage and the intake system in the intake system for sensing an intake air flow rate. An electronic control unit (ECU) performing various types of control of the engine diagnoses a clogging abnormality of the PCV passage based on pulsation width of the intake air flow rate sensed with the air flow meter. A thermal type sensor having a heating section and a temperature sensing section provided on a semiconductor substrate is used as the air flow meter.