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When reforming is not used, the fuel and exhaust pass through CV2 unchanged. The basic concept of TCR involves using exhaust heat to promote on-board reforming of hydrocarbon fuels into syngas (a mixture of carbon monoxide and hydrogen). The syngas is then burned in the engine in place of some or all of the original fuel.
Rendering of the Ilmor 5-stroke conceptengine. Ilmor Engineering will present a new cutaway version of the Ilmor 5-stroke conceptengine at the upcoming Engine EXPO 2009, 16-18 June, in Stuttgart, Germany. The 5-stroke conceptengine is a self-funded proof of concept. Click to enlarge.
It expands all the way to ambient pressure before the exhaust stroke. The power is produced in almost a 50-50 split between the combustion (central) and exhaust (largest) pistons. Transfer from the combustion cylinder to the exhaust cylinder takes place when the exhaust cylinder volume is minimal. and O’Malley, E.
The basic idea of the new Diesel combustion illustrated in this paper is to control the heat release rate by a gradual supply of an almost homogeneous charge, without relying on exhaust gas recirculation to moderate the reaction. Thus the HCPC range can extend to all engine operating conditions, including very high loads. Tamagna, D.,
Since heat release increases pressure inside the channel, opening the outer channel end generates an outflow of the exhaust gases. Janusz Piechna, Pezhman Akbari, Florin Iancu, Norbert Müller (2004) Radial-Flow Wave Rotor Concepts, Unconventional Designs and Applications (IMECE2004-59022). Source: Piechna, 2004. Click to enlarge.
Secondly, the central combustion chamber is benefit for highly efficient scavenging via intake and exhaust ports without using valves. Firstly, inherent mechanical balance of the system can be realized when the two linear generators are synchronized. —Ling Huang 2012. —Huang et al.
The HPE was long thought to be a system in which all engine valves had to be actuated in a fully variable manner to allow for two-stoke pneumatic modes and still enable the four-stroke combustion mode. In large naturally-aspirated SI engine, high-friction, pumping losses and part-load operation all contribute to poor fuel efficiency.
Rotor 1, Rotor 2 and the connecting cam form the total internal mechanism of the engine. The Exhaust port is located on the outer side of the engine block. The engine, according to the company, does not have a traditional Otto or Diesel cycle. First, it helps to oxidize the exhaust gases more fully.
High efficiency internal combustion engine. Heat recovery could also be achieved using the Ricardo split cycle engine, a novel internal combustion engine design that incorporates liquid nitrogen to capture exhaust heat and increase fuel efficiency. The Dearman engine. Compressed air engines (e.g.,
An adaption of cylinder de-activation technique called ECONAMIQ over-expansion can be applied to engines to improve fuel efficiency. Using the pressure from the exhaust gas from the active cylinders, the ‘idle’ cylinders could be expanded to extract more work out of the engine during partial load operation.
It compresses the pressurized gas produced by exhaust gas turbocharger, comprising fresh air and exhaust gas introduced from the EGR valve. Compound HPE is divided into a compressor cylinder and a power cylinder, combined with a compressed air storage tank. Then it charges the compressed air storage tank. —Meng et al. 5b01842.
The project will take the Garric design from its current advanced concept stage to development of a fully functional prototype, according to the company. The Garric engine has been to operate on a wide variety of liquid and gaseous fuels. It also directs the spent exhaust gasses out of the torus.
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