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. 19, 2017
Filed:
Sep. 22, 2014
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Katsunori Yazawa, Kasugai, JP;
Tomonori Uemura, Kasugai, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
In a heather control apparatus for a gas sensor, a CPU obtains upper and lower limit values by adding a predetermined value to and subtracting the predetermined value from an Rpvs average obtained in a last heater energization period (or to an Rpvs value obtained for the first time), and sets a window W. The CPU obtains a plurality of Rpvs values [P] to [P], and obtains an Rpvs average Awhile excluding Rpvs values [P], [P], and [P] which do not fall within the window W(not less than the lower limit value and not greater than the upper limit value). The CPU obtains the upper and lower limit values by adding the predetermined value to and subtracting the predetermined value from the Rpvs average A, and sets a window Wfor the next heater energization period.