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:
May. 12, 2026
Filed:
Mar. 17, 2023
Ngk Insulators, Ltd., Nagoya, JP;
Yuichiro Kondo, Obu, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A COmass estimation system includes: an acquisition element acquiring detected values in accordance with concentrations of oxygen, HO, and COcontained in an engine exhaust gas output from a gas sensor; a setting element setting an air-fuel ratio of a mixture; and a calculation element calculating the mass of COcontained in the exhaust gas, wherein the calculation element calculates the concentrations of oxygen, HO, and COcontained in the exhaust gas based on the sensor detected values, acquires concentrations of oxygen and HO in air and the air-fuel ratio, calculates a composition ratio of at least C atoms contained in fuel based on the concentrations in the exhaust gas, the concentrations in the air, and the air-fuel ratio, and estimates the mass of COcontained in the exhaust gas based on the composition ratio and the amount of injection of the fuel into the engine.