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Motiv Engines, LLC introduced the second-generation of its engineconcept dubbed the MkII Clarke-Brayton Engine, which it intends to develop into a heavy-duty on-highway engine fueled by liquid natural gas (LNG). The technology for the MkII Clarke-Brayton Engine originated at Caterpillar, Inc.
FEV) a leading developer of advanced powertrain and vehicle technologies, will exhibit a lean burn engineconcept at the SAE 2011 World Congress that has been modified to run on Compressed Natural Gas (CNG). This engine demonstrates a potential near-term solution. FEV Inc., (FEV) —Gary Rogers, FEV, Inc. Resources.
A team from Universita degli Studi di Pisa (Italy) and Rolf Reitz at the University of Wisconsin-Madison are proposing a novel combustion concept—Homogenous Charge Progressive Combustion (HCPC)—based on a split-cycle principle to control HCCI combustion in diesel-fueled engines. —Musu et al., SAE 2010-01-2107.
Prototype of a Bladon Micro-Jet engine. A consortium led by micro gas turbine company Bladon Jets recently secured investment from the UK Technology Strategy Board to develop an Ultra Lightweight Range Extender (ULRE) for next-generation electric vehicles. Tags: ConceptEnginesEngines Hybrids. Click to enlarge.
Wave rotor technology has been explored since 1906, although its first significant application was in 1940 by Brown Boveri Company (BBC, today ABB) which used it as a high pressure stage for a gas turbine locomotive engine. Early concept of an internal combustion wave disc engine. Hîrceagã, M.,
Each piston bank operates independently of the other but is housed within the same engine block and has separate lubrication systems. The Eco-Motive H-motor—basically two separate engines housed within the same engine block—can be powered by either gasoline or compressed natural gas (CNG), at the driver’s decision.
HCCI is a combustion regime in which well-mixed fuel, exhaust gas and air are compressed to the point of auto-ignition. Unlike a spark ignition gasengine or diesel engine, HCCI produces a low-temperature, flameless release of energy throughout the entire combustion chamber.
Before realizing the design of a hybrid pneumatic engine (HPE) in hardware, the researchers evaluated the different pneumatic engine modes (motor mode and pump mode) associated with both two-stroke and four-stroke implementations of the pneumatic concept. The hardware concept. Dönitz et al. Test bench setup. Dönitz et al.
A German company, vv-tec GmbH , is developing a compact piston-driven turbine—the Reinhardt Turbine, named after its inventor—that it says is a two-cycle (gas and steam) thermodynamic process machine that can be built with conventional components and can achieve efficiency of at least 60%. The engine components are contained within a sphere.
Each cylinder fires twice per revolution and two cylinders fire simultaneously, resulting in four times the output per revolution of a conventional four-stroke engine at the same displacement. The engine can be adapted to run any combustible gas or liquid as fuel. Tags: ConceptEngines. OX2 in a test rig.
The expanded gas then forces the bearings down the ramps of the cams spreading them apart ending the stroke. This test regimen will take pressure readings taken from within the engine’s cylinder head, as well as multiple pressure sensor readings from within the manifolds. Tags: ConceptEnginesEngines.
A cryogenic engine such as the Dearman piston engine produces zero emissions at the point of use; has low greenhouse gas emissions provided the liquid air or nitrogen is produced from low carbon electricity; has energy and power density on a level with battery electric technology; and has the potential for rapid refueling.
The combination of discrete, asymmetrically sized cylinders and fully variable valvetrain promises the ability to vary displacement ratios, bore-stroke ratios, compression-expansion ratios, compression-expansion phasing, and gas transfer phasing for engine optimization—i.e., a more efficient internal combustion engine.
Since internal combustion engines will remain the primary mode of choice for mobility in the foreseeable future, both alternative (renewable) fuels and high-performance combustion concepts/ engines using fuels adapted for that purpose will be preferred for reducing the combustion impact on climate change.
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.
Furthermore, natural gas will be investigated as the fuel of the system. The control method of linear generator and the movement of free-piston will be investigated, and special attention will be [paid to] the synchronization of th left and the right pistons. —Huang et al.
EPS said that the partnership is an example of different industry players with aligned values coming together to lower greenhouse gas emissions. MAN’s methanol-fueled ME-LGIM engine inherits well-known aspects and features of the standard MAN B&W two-stroke diesel engine. —Cyril Ducau, EPS CEO.
The new ECONAMIQ technology builds on existing concepts such as cylinder deactivation and variable valve timing with a unique patented combination of routing gasses for increased system efficiency. The company presented its first results at the annual ASME ICEF (Internal Combustion Engine Fall) conference in Chicago.
It compresses the pressurized gas produced by exhaust gas turbocharger, comprising fresh air and exhaust gas introduced from the EGR valve. However, the control of combustion phasing is one of the crucial issues in determining whether the diesel PCCI engine could be commercialized or not.
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