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, 2002
Filed:
Jan. 28, 1999
Hiroshi Inagaki, Aichi, JP;
Noriaki Kondo, Aichi, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A connector for an NOx sensor is connected via a cable C to an end of a sensor body through which a first pump current and a second pump current flow according to the concentration of oxygen and that of NOx, respectively, contained in a gas to be measured. The connector is provided with not only terminals for inputting a signal to and outputting a signal from the sensor body but also a label resistor RL having resistance corresponding to characteristics (relationship between oxygen concentration and first pump current and that between NOx concentration and second pump current) of the sensor body and label signal output terminals T and T connected to opposite ends of the label resistor RL. On the basis of characteristics of the sensor body , which are identified from the resistance of the label resistor RL which, in turn, is identified via the terminals T and T , the oxygen concentration and the NOx concentration are accurately obtained from detected values of the first and second pump currents. This enables an NOx sensor to always perform accurate measurement irrespective of variations in characteristics among NOx sensors.