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Study finds engines emit exhaust nanoparticles even when not fueled during engine braking

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Exhaust particle size distributions measured by ELPI (color map) and particle concentration measured by CPC (white line) during individual engine braking conditions (speed change from 32 km/h to 0 km/h). The starting point of engine braking is marked by a vertical green line, and the end point is marked by a vertical red line.

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First online measurement of gaseous sulfuric acid in diesel exhaust helps clarify role in formation of nucleation particles

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Researchers in Germany and Finland report the first online measurement of gaseous sulfuric acid (GSA) in the exhaust gas of a modern heavy-duty diesel engine in an effort to quantify the role of low-vapor-pressure gases in the formation of nucleation particles (NUP). of hydrocarbons) significantly. —Arnold et al.

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Study shows renewable diesel from crude tall oil is a high quality drop-in fuel for off-road engines

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A team from the University of Vaasa (Finland) and UPM-Kymmene Corporation has examined how the blends of fossil and renewable diesel produced from crude tall oil (CTO) affect the performance and exhaust emissions of the modern common-rail off-road diesel engine. No engine or parameter modifications were made.

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Neste: use of our renewable fuels reduced global climate emissions by 8.3 million tons in 2017

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The emission reduction is calculated by comparing the life cycle greenhouse gas emissions of the renewable fuels that Neste produces in a year to the life cycle emissions of conventional European diesel. The amount of greenhouse gas emissions saved with Neste’s renewable fuels—primarily Neste MY Renewable Diesel—increased by 1.6

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VTT, Argonne joint study concludes new technologies to reduce friction should be able to reduce fuel consumption by up to 61% in 15-25 years

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Use of new technologies to reduce friction losses should be able to lower automotive fuel consumption and emissions by 18% within the next 5 to 10 years and by up to 61% within 15 to 25 years, according to a joint study by VTT Technical Research Centre of Finland and Argonne National Laboratory (ANL) in the US. million TJ/a.

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Ricardo investigating potential for its split-cycle engine in large engine market

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Ricardo is exploring the value proposition for applications of its novel split-cycle combustion engine ( earlier post ). Ricardo, in collaboration with the University of Brighton, has been developing the split-cycle engine with an eye toward improving the thermal efficiency of heavy-duty engines. Gurr (2016). Click to enlarge.

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Study finds that optimizing engine parameters for renewable diesel can reduce PM and NOx both by more than 25%

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Relative changes in PM characteristics (PM, N tot , GMD, FSN, and SA) on (a) 50%, (b) 75%, and (c) 100% loads and (d) NO x emissions due to engine parameter adjustments at the studied engine loads. It has been already reported that by changing the fuel from conventional EN590 diesel to HVO decreases exhaust emissions.

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