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Study finds total greenhouse gas footprint of blue hydrogen “quite high” due to fugitive methane

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emission rate of methane from natural gas and a 20-year global warming potential), total carbon dioxide equivalent emissions for blue hydrogen are only 9%-12% less than for gray hydrogen. The open access paper by Cornell’s Robert Howarth and Stanford’s Mark Jacobson is published in the journal Energy Science and Engineering.

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Bosch overview of global diesel markets; optimistic about US, China

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Bosch, a leading supplier of technology for diesel engines, recently provided an overview of trends it sees in the diesel engine marketplace globally. In addition to the ongoing strength in the European market and India (the second-largest diesel market after Europe, Bosch sees potential strength in North America and China.

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FEV study finds optimizing engine for renewable diesel use reduces fuel consumption and emissions

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Neste Renewable Diesel has already been shown to be able to reduce greenhouse gas emissions by up to 90% on a full lifecycle basis compared to conventional fossil diesel. The emission measurements were carried out before the catalytic converter and diesel particulate filter (DPF). On a non-optimized basis (i.e.,

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Audi testing find e-ethanol and e-diesel produced by Joule often perform better than conventional counterparts

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Audi testing of synthetic ethanol (Audi e-ethanol = Joule Sunflow-E) and synthetic diesel (Audi e-diesel = Joule Sunflow-D), produced in partnership with Joule ( earlier post ) in a pressure chamber and optical research engine has shown that the Audi e-fuels often perform better than their conventional counterparts. Click to enlarge.

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CPT, TU Wien study finds 48V mild diesel hybrid cuts engine-out NOx 9%, 4.5% fuel economy improvement

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A joint study by Controlled Power Technologies (CPT) and Austria’s Technische Universität Wien (TU Wien) into 48V diesel mild hybrid technology verified a 9% reduction of NO x in raw engine-out emissions, while retaining the fuel economy and CO 2 benefits of diesel engine technology. —Paul Bloore.

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Volkswagen Millerized 1.5 TSI ACT BlueMotion gasoline engine offers diesel-like fuel economy; derivatives may be applied in hybrid systems

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Volkswagen has developed and deployed a gasoline engine that offers diesel-like fuel economy but is significantly cheaper to buy. By way of comparison: a conventional turbo system diverts part of the exhaust gas stream needed for the forced induction away from the turbine via a wastegate valve as a function of its operating state.

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Mercedes-Benz powering ahead with €3B strategic engine initiative; increasing electrification, 48V; diesel and gasoline; cylinder deactivation

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For the mobility of the future, we are deliberately not committing ourselves to one solitary form of drive system, but to a coexistence of efficient and clean petrol engines, diesels, plug-in hybrids, battery and hydrogen drive systems. Another feature of the new family of premium gasoline engines is near-engine exhaust aftertreatment.

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