The on-road exhaust emissions characteristics of SUV vehicles fitted with diesel engines
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Publication date: 2011-05-01
Combustion Engines 2011,145(2), 58–72
The paper presents the results of on-road exhaust emission tests of Sport Utility Vehicles fitted with diesel engines, and a DPF (diesel particulate filter). Under such conditions the authors could determine the actual vehicle emissions. The tests were performed on a road portion of a hundred kilometers or so – these tests provide information on the on-road emissions and are a basis for their ecological evaluation. For the measurement of the exhaust emissions the authors used a portable exhaust emissions analyzer SEMTECH DS by Sensors Inc. The analyzer measured the concentration of the exhaust components at the same time measuring the exhaust mass flow. The measurements of the particulate matter (mass, number and spectral distribution) were done with the use of particle analyzer by AVL and a mass spectrometer by TSI. The obtained data were used to calculate the relations that characterize the influence of the dynamic engine parameters on the exhaust emissions. These properties were taken into account indirectly using the whole range of speeds and accelerations of the vehicle for the preparation of the matrices of the emissions rate. The used data were averaged within individual speed and acceleration ranges thus obtaining the characteristics of the share of operation in individual ranges and the characteristics of the emission matrices of the individual emission components. The above results served for defining of the emission level indicator of the vehicles that can be used for classification of vehicle fleet in terms of their emission level.