Patent ID: 6532793
Filing Date: 2003-03-18
Classification: F01N,G01M

Abstract:
A method for measuring gas substance pollutants in exhaust gases emitted by an exhaust system of a vehicle comprising the steps of:detecting at least one gas substance in the exhaust gases, the at least one gas substance selected from the group consisting of hydrocarbons (HC), carbon monoxides (CO), and nitrogen oxides (NO); determining a maximum quantity of said gas substance emitted during a cold-start period; determining the duration of said cold-start period; determining a time of emission of said maximum quantity of said gas substance emitted by said vehicle; determining an area under a curve defined by said emission of said gas substance over time; and assessing said gas substances in said exhaust gases using said determination of said maximum quantity of said gas substances emitted, said time of emission of said maximum quantity of said gas substance emitted, said duration of cold-start period, and said area under said curve defined by said emission of said gas substance over time.