VEHICLE EXHAUST GAS EMISSION SAMPLING AND ANALYSIS ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a vehicle exhaust gas emission analyzer adapted to mounting to a vehicle. SOLUTION: A vehicle exhaust gas emission analyzer assembly (12) for a vehicle having a passenger compartment includes a gas analyzer system (18) adapted to determine concentration and/or mass flow of at least one type of exhaust gas of an internal combustion engine. The gas analyzer system (18) includes a particular housing (20) for the gas analyzer system. The gas analyzer system (18) includes a hydrocarbon gas analyzer (40) that is operated at temperature that is sufficiently high to reduce deposits of hydrocarbon molecules present in a sample gas. The gas analyzer (40) includes an ultraviolet source including a discharge lamp having a discrete emission line at an absorption frequency for a particular nitrogen-based gas.