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[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]

Dalian team proposes jet controlled compression ignition to control PCCI phasing in a hybrid pneumatic engine

December 30, 2015

Researchers at the Dalian University of Technology have proposed a novel method to control premixed charge compression ignition (PCCI) phasing in internal combustion engines in all load operations. High-pressure air jet controlled compression ignition (JCCI) is based on a compound thermodynamic cycle and is implemented in a hybrid pneumatic engine (HPE) as proposed by Schechter in 1999.

The application of HPE is also beneficial to the fuel consumption and emissions because of its several flexible operation modes. A paper on the use of JCCI is published in the ACS journal Energy & Fuels.

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Libertine FPE builds demo prototype of linear free piston generator

April 17, 2015

UK-based Libertine FPE has built a demonstration prototype of its linear electrical machine for what it is calling “Digital Piston Motion Control” in free piston engine applications. (Earlier post.) This technology will allow researchers to develop future combustion engines free from the piston motion constraints dictated by the crankshaft. Already validated at proof-of-concept level, Libertine’s new hardware uses production-feasible component designs suitable for automotive hybrid powertrain modules, such as range extenders.

Unlike conventional engine-generator combinations which use a crankshaft and mechanical powertrain to rotate an electrical machine, Libertine’s technology uses a linear electrical machine to generate power directly from the piston’s motion. The linear generator can also be used as a motor to apply a variable force to the piston, and this approach permits each piston’s velocity, motion profile and compression and expansion ratio to be optimally controlled via the ECU to accommodate startup, transient and flex-fuel operation. This flexibility offers significant improvements in combustion efficiency and has the potential to produce a third more power from the same fuel input.

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DOE to award $55.8M for advanced vehicle technologies; $35M for fuel cell and hydrogen

January 22, 2015

US Energy Secretary Ernest Moniz announced a new Vehicle Technologie program-wide funding opportunity (DE-FOA-0001201) for $55.8 million. DOE also announced up to $35 million to advance fuel cell and hydrogen technologies, including enabling the early adoption of fuel cell applications, such as light duty fuel cell electric vehicles. This new funding opportunity announcement will be available in early February.

The Vehicle Technologies funding is targeted at a wide range of research, development, and demonstration projects that aim to reduce the price and improve the efficiency of plug-in electric, alternative fuel, and conventional vehicles. Topics addressed include: advanced batteries (including manufacturing processes) and electric drive R&D; Lightweight materials; Advanced combustion engine and enabling technologies R&D; and Fuels technologies (dedicated or dual-fuel natural gas engine technologies).

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