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. 27, 2012
Filed:
Feb. 19, 2009
Fumikazu Satou, Toyota, JP;
Fumikazu Satou, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An abnormality diagnosis device for diagnosing abnormality in a positive crankcase ventilation apparatus including a PCV passage, which is for supplying blow-by gas to an intake passage of an engine, and a PCV valve, which is for regulating the flow rate of blow-by gas in the PCV passage. The diagnosis device varies a control amount of the PCV valve to determine the occurrence of an abnormality in the PCV passage and PCV valve and performs abnormality diagnosis in a first determination mode when the amount of fuel components in the blow-by gas is less than a reference amount and in a second determination mode when the amount is greater than the reference amount. A varying amount of the control amount of the PCV valve in the second determination mode is smaller than that of the control amount of the PCV valve in the first determination mode.