Patent ID: 6085582
Filing Date: 2000-07-11
Classification: G01M,G01N

Abstract:
A vehicle exhaust mass emission analyzer, comprising:an exhaust inlet adapted to collect vehicle exhaust;a dilution air inlet connected with said exhaust inlet to provide a dilute mixture of vehicle exhaust and dilution air;a first analyzer which measures concentration of undiluted exhaust gas components from said exhaust inlet;a second analyzer which measures concentration of at least one dilute mixture gas component, said at least one dilute mixture gas component being a particular exhaust gas component measured by said first analyzer which is also present in ambient air in an accurately measurable quantity;a meter which measures flow rate of said dilute mixture; anda processor which computes mass of the exhaust gas components from said concentration of the undiluted exhaust gas components, said concentration of at least one dilute mixture gas component and said flow rate of said dilute mixture.