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. 16, 2003
Filed:
Sep. 12, 2000
Tokihiro Tsukamoto, Kyoto, JP;
Nobutaka Kihara, Kyoto, JP;
Horiba Ltd, Osaka, JP;
Abstract
The present invention provides a simple method of measuring NO in a running vehicle. While running on an actual road surface, the weight of NO emitted from an engine of the running vehicle can be found more simply and accurately. The present invention comprises mounting a NO analyzer, an air-fuel ratio sensor, and a data collection device on a vehicle, allowing the vehicle to run on the actual road surface, introducing the exhaust gas emitted while running on the actual road surface to a NO analyzer to determine the concentration of NO contained in the exhaust gas, determining a flow rate of the exhaust gas by using a fuel injection quantity based on a fuel injection pulse output from an electronic control unit mounted on the vehicle and an output from the air-fuel ratio sensor, and determining the weight of NO emitted from the engine from the flow rate of the exhaust gas and the concentration of NO .