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RVPs (predicted DVPE) of single- and dual-alcoholblends in gasoline with different relative proportions of ethanol and 1-butanol. As part of the study, they demonstrated a simple method to prepare dual-alcohol-gasolineblends with Reid vapor pressures (RVPs) “ indistinguishable ” from that of the base gasoline.
Summary of significant emissions results from the fuel testing. Given equivalent deployment of butanols and ethanol, the results suggest emissions of unburned alcohols would decrease, but carbonyl emissions would increase; some of these compounds have poorly understood health effects, they note. Click to enlarge.
ExxonMobil Research and Engineering Company has filed a US patent application (# 20100326387 , published 30 December 2010) on methods using a wide range of fuel-alcoholblends to expand the operating envelope of engines operating in advanced combustion modes. reduced maximum rates of pressure increase during HTHR.
Among their findings was that for gasoline fuels, aggressively downsizing the engine and adopting homogeneous direct fuel injection enabled an improvement in fuel consumption of ~17% over the New European Drive Cycle compared to a naturally aspirated PFI unit. Cairns et al. SAE 2009-01-0138). Key Properties of the Test Fuels. Cairns et al.
Researchers from Tsinghua University and Peking University have investigated the effects of fuel properties on particulate emissionsgasoline direct injection engines (GDI). The study results, reported in the journal Fuel , demonstrated that the fuel composition has a significant on particulate emissions from GDI engines.
These blendstocks are best-suited for light-duty (LD) gasoline BSI engines. The merit function determines potential improvements in engine efficiency, was used to evaluate the performance of candidate bio-blendstocks in blends up to 30%. The blendstocks were identified using a fuel property basis using the BSI merit function.
This research involves identifying the fuel properties and engine parameters that mitigate knock and emissions, while maximizing boosted SI efficiency and performance. Of the fuel properties investigated, these six were found to have the most impact on engine efficiency and emissions. What Fuels Should We Make?
CRI, founded in 2006 in Reykjavik, Iceland, is developing technology to produce renewable methanol from clean energy and recycled CO 2 emissions. Geely is committed to achieving the long-term goal of zero emissions mobility through a diverse suite of new energy solutions, including renewable methanol vehicle technology.
. … To achieve continued improvement in engine efficiency and CO 2 emissions, it is critical to quantify the roles of fuel octane rating and alcohol content. Alcohol and gasoline-alcoholblends also offer efficiency benefits independent of their octane value.
In 1975, General Ernesto Geisel, then-president of Brazil, ordered the country’s gasoline supply mixed with 10% ethanol. The level was raised to 25% over the next five years, which was intended to maintain a constant Brazilian gasoline supply for an ever-increasing demand. These were arguably the first flex-fuel vehicles.
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