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:
Oct. 23, 2012
Filed:
Sep. 15, 2009
Hideki Matsunaga, Ageo, JP;
Yoshikuni Satou, Nagoya, JP;
Takashi Yamamoto, Nagoya, JP;
Takeo Sasanuma, Nagoya, JP;
Hideki Matsunaga, Ageo, JP;
Yoshikuni Satou, Nagoya, JP;
Takashi Yamamoto, Nagoya, JP;
Takeo Sasanuma, Nagoya, JP;
Nissan Diesel Motor Co., Ltd., Ageo-shi, JP;
NGK Spark Plug Co., Ltd., Nagoya-shi, JP;
Abstract
An apparatus for distinguishing a liquid reducing agent which judges empty with a higher precision than heretofore is provided. The apparatus for distinguishing a liquid reducing agent is provided with a concentration sensor and a liquid-level sensor in storage tank of liquid reducing agent, and is characterized in that empty is judged by utilizing the liquid-level based on the liquid-level sensor in addition to the concentration based on the concentration sensor (stepand step). Even if a bubble is adhering to the concentration sensor and an erroneous signal indicative of empty is output although the residual quantity of liquid reducing agent is sufficient, the liquid-level sensor does not output a signal indicative of empty. Consequently, erroneous judgment is prevented and accurate judgment can be made as compared to heretofore.