Improved Driving Cycle for Testing Automotive Exhaust Emissions

1978 ◽  
Author(s):  
M. Kuhler ◽  
D. Karstens
Keyword(s):  
Exhaust Emissions ◽  
Driving Cycle ◽  
Automotive Exhaust

A new two-stage separation procedure for the IDMS based quantification of low Pd and Pt amounts in automotive exhaust emissions

2015 ◽  
Vol 30 (2) ◽  
pp. 479-486 ◽  
Author(s):  
Jochen Vogl ◽  
Christian Meyer ◽  
Maren Koenig ◽  
Dorit Becker ◽  
Janine Noordmann ◽  
...  
Keyword(s):  
Exhaust Emissions ◽  
Separation Procedure ◽  
Automotive Exhaust ◽  
Two Stage ◽  
Effective Separation ◽  
Stage Separation

A two-step separation procedure for the IDMS-analysis of Pd and Pt was developed enabling effective separation from interfering elements.

scholarly journals Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements

Atmosphere ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 64 ◽  
Author(s):  
Chao Ma ◽  
Lin Wu ◽  
Hong-jun Mao ◽  
Xiao-zhen Fang ◽  
Ning Wei ◽  
...  
Keyword(s):  
High Speed ◽  
Exhaust Emissions ◽  
Particulate Filter ◽  
Specific Power ◽  
Vehicle Emission ◽  
Emission Rates ◽  
Automotive Exhaust ◽  
Nucleation Mode ◽  
Medium Speed ◽  
High Emission

Previous works on real-world vehicle emission characteristics have mainly focused on the influences of fuel, speed, vehicle type, elevation, and other factors on vehicle emission quantity and components. However, few studies have investigated the transient trend of automotive exhaust emissions through on-road measurements. The key objective of the present paper was to examine the transient characteristics of exhaust emissions from different vehicle types on the roads of Tianjin. To achieve the goal, a portable emission measurement system (PEMS) was employed to monitor emissions from selected test vehicles—private cars, passenger vehicles, and cargo vehicles. It was found that the high-emission points of test vehicles were mainly distributed in two regions: the high-speed region (speed > 70–90 km/h, vehicle-specific power (VSP) > 0 kW/t) and the medium-speed–acceleration region (20–30 km/h < speed < 60–90 km/h, 0 kW/t <VSP < 12 kW/t). The CO, hydrocarbon (HC), NOx, and particulate number (PN) average emission rates in the high-emission points could be 3.15–14.93 times, 1.93–24.89 times, 3.23–6.03 times, and 3.22–30.27 times of those of average emission rates. The HC, NOx, and PN average emission rates of China IV vehicles in the high-emission points were 2.46–4.92 times, 3.56–6.03 times, and 3.22–13.21 times of those of average emission rates, not less than those of China III (1.93–2.52 times, 2.75–3.90 times, and 9.98–22.34 times). Test vehicles mainly emitted nucleation-mode and Aitken-mode particles, and the increase of the PN concentration emission rate in low-speed and high-speed regions was higher than that in the medium-speed region. The exhaust gas recirculation (EGR) + diesel particulate filter (DPF) could effectively inhibit the Aitken output caused by turbocharged intercooler (CIC). The selective catalytic reduction (SCR) might cause more nucleation-mode particles.

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