real world driving emissions Articles
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Emission behaviour of modern heavy duty vehicles in real world driving
Within a national and two international research projects, a vehicle emission model was developed, which calculates emissions in real world driving from the engine emission maps by simulating engine power and engine speed. Influences of transient load changes on the emission level are taken into consideration by special functions. Model parameters are gained from a common measurement protocol on ...
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Characterising emissions from private passenger vehicles using engine operating patterns
A method to simulate emissions factors using frequency distribution plots of engine speed and engine load is proposed. The distribution plots and corresponding emissions factors were developed from speed time series' of real-world driving cycles and physical properties of a range of private passenger vehicles tested at the EMPA. Emissions factors were estimated for a set of simultaneously ...
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Explaining vehicle emissions – why do laboratory and road measurements differ?
The road transport sector is a major contributor to Europe’s emissions of greenhouse gases and air pollution. For certain pollutants, vehicles can emit substantially higher emissions on the road than official emissions tested in laboratories. A report released today by the European Environment Agency (EEA) provides a non-technical guide that describes the reasons for these often significant ...
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Engine emissions analyzer further improves Intertek’s emissions testing capability - Case study
An advanced FTIR analyser installed at Intertek’s engine test facility in Milton Keynes is enabling engineers to improve the quality of their tests on the gaseous components of engine exhaust emissions. The gas analyser manufactured by Gasmet Technologies and installed by their UK subsidiary, Quantitech, measures multiple organic and inorganic components simultaneously from a large ...
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Technological solutions and behavioural change needed to decarbonise transport
While the transport sector contributes significantly to society and the economy it also can cause substantial adverse impacts on the environment, global climate and human health. A new report by the European Environment Agency (EEA) analyses key environmental trends with a view to identifying what has improved and what has hampered the past performance of the transport sector. The transport ...
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Modelling fuel consumption and pollutant emissions based on real-world driving patterns: the HBEFA approach
Emissions of passenger cars and light-duty vehicles with complex exhaust gas after-treatment are difficult to predict, especially if the prediction is only based on kinematic parameters without vehicle-specific data. A new method for modelling fleet emission factors based on testbench data is presented. It has been used for modern passenger cars and light-duty vehicles (EURO-2 and -3) in the new ...
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VOC composition and ozone-forming potential of the exhaust gas of in-use motorcycles
The emission profile of volatile organic compounds (VOC) and the ozone-forming potential (OP) of the exhaust gas of six in-use motorcycles (four 4-stroke- and two 2-stroke-engines) were determined. The motorcycles were tested on a chassis dynamometer in a real-world driving cycle. The analysis involved the C2–C12-hydrocarbons as well as the aldehydes and ketones. Additionally, the regulated THC ...
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