Quasiturbine technology uses photo-detonation for low-power-efficiency and requires low octane, additive-free gasoline or diesel fuel. It is also multi-fuel compatible including direct hydrogen combustion and offers a drastic reduction in existing propulsion system weight, size, maintenance and costs. Utilised within the internal combustion engine, the photo-detonation process could save half the gasoline now consumed by vehicles and provide substantial environmental benefits. The Quasiturbine looks at first like a rotary engine with a deformable rotor made of four identical blades, but because it has no crankshaft and does not follow sinusoidal motion, it has properties far different from the piston and the Wankel rotary piston engine. The Quasiturbine engine has been developed to simultaneously optimise the 14 most important engine parameters, including compatibility with the revolutionary photo-detonation mode knocking , which the piston engine cannot effectively tolerate. When taken together, these improvements increase fuel efficiency while simultaneously reducing exhaust emissions.
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The Quasiturbine or Qurbine engine is a proposed pistonless rotary engine using a rhomboidal rotor whose sides are hinged at the vertices. The volume enclosed between the sides of the rotor and the rotor casing provide compression and expansion in a fashion similar to the more familiar Wankel engine , but the hinging at the edges allows the volume ratio to increase.
Unlike vane pumps , in which vane extension is generally important and against which the pressure acts to generate the rotation, the Quasiturbine contour seals have a minimal extension and the rotation does not result from pressure against these seals.
As well as an internal combustion engine , the Quasiturbine has been proposed as a possible pump design, and a possible Stirling engine.
The earliest Quasiturbine design used a three-wheeled carriage French chariot , hence avec chariots or AC for with carriages to support each vertex of the rotor. The wheels of these four carriages, making twelve wheels in total, ran around the periphery of the engine chamber. A prototype of an internal combustion engine to this design was constructed, and enthusiastically reviewed in European Automotive Design magazine September, The prototype was turned by an external engine for 40 hours.
However, ignition with fuel was never achieved. If it was attempted no results were ever released, and development work on this design was suspended. The two-port design with carriages was proposed to make possible a new and superior mode of combustion, termed photo-detonation by the Quasiturbine inventors.
This resembles detonation , as used in the Bourke engine , akin to knocking and pinging undesirable in common internal combustion engines. As of [update] , no research has been published supporting this claim. A related idea that flame transfer would be possible through special ports is similarly unsupported. The second Quasiturbine design is greatly simplified to eliminate the carriages French sans chariots or SC.
At the same time, the ports were duplicated on the opposite side of the housing, thus converting the operation from four strokes per cycle to two and doubling the number of cycles per rotor revolution. This mechanism has been demonstrated running as a pneumatic engine using stored compressed air, and also as a steam engine.
This is also the design proposed for use as a pump , and particularly as a supercharger. This design uses redesigned blades, longer than those for a similar sized housing of the first type owing to the absence of the carriages, and lacking the distinctive crown contour.
Only the basic rotor geometry is common with the earlier design. A pneumatic engine of this design was demonstrated powering a go-kart in November , and another powering a small car in September , both vehicles using stored compressed air to power the engine. As of [update] a pneumatic chain saw driven by an air hose from a conventional external compressor is under development. With a suitably redesigned housing to allow for thermal expansion, the same rotor design has been demonstrated as a steam engine.
Another potential variation of this design uses the two sets of ports independently, one as an engine and the other as a pump, thus potentially integrating the functions of a pump and its driving motor in one shaftless unit. One restriction of this usage is that the two fluids must be similar; It would not be possible for example to drive an integrated air pump with hydraulic fluid, as the rotor design is significantly different.
As of [update] no prototype of this variation has been demonstrated. This third design combines aspects of the first two. As of [update] this design is conceptual only. It has not been built, but is used for purposes of illustration. If built it would not support photo-detonation. Many other designs are possible within the patented Quasiturbine model, with or without carriages and with differing numbers of ports.
As of [update] , which design will be used for further work on the internal combustion version has not been announced. Lately, research was conducted by Dr.
Gilles Saint-Hilaire, a thermonuclear physicist , and members of his immediate family. The original objective was to make a turbo-shaft turbine engine where the compressor portion and the power portion would be in the same plane.
In order to achieve this they had to disconnect the blades from the main shaft, chain them around in such a way that a single rotor acts as a compressor for a quarter turn and as an engine for the following quarter of a turn. The general concept of the Quasiturbine engine was first patented in Small pneumatic and steam units are available from the patent holders for sale or hire for research, academic training and industrial demonstration, as is a book largely in French describing the concepts and development of the design.
The patent holders have announced that they intend to make similar internal combustion prototypes available for demonstration. From Wikipedia, the free encyclopedia. This article has multiple issues. Please help improve it or discuss these issues on the talk page.
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The Quasiturbine: Promising To Revolutionize Engines
The Quasiturbine , is a new concept patented 10 years ago , that promises to revolutionize the internal combustion engine. It is said to make engines more efficient, quieter and much lighter for the same torque and horsepower abilities. It also promises to make for better compressors and pneumatic motors refrigeration, heat pumps, stirling engines, steam turbines. The Quasiturbine or Qurbine engine is a pistonless rotary engine using a four-sided rhomboid rotor whose sides are hinged at the vertices. For more details see this explanation of how the Quasiturbine works. Patents for the Quasiturbine are held by the Saint-Hilaire family of Quebec.
Since the Quasiturbine is a pure expansion engine which the Wankel is not, neither most of other rotary engines , it is well suitable as compressed fluid engine — Air engine or air motor. From the basic cc per revolution engine bloc, a compressed air prototype has been built making use of 2 parallel expansion circuits of cc per revolution each, for a total of about 14 cubic feet intake per minute at RPM. The pneumatic engine does not show any vibration on the shaft. It does run in heavy smoke or under water as well. Exhaust can even be respirated by the fireman! A must for all civil defence organization …. All gas heat up during compression and cool down during relaxation.
How Quasiturbine Engines Work
Engine design is at the confluence of three factors: concerns about how car emissions will affect the environment; rising gas prices and the need to conserve fossil fuel resources; and the realization that the hydrogen-powered car -- be it powered by a hydrogen fuel cell or by hydrogen internal combustion -- will not deliver on its promise in the near future. As a result, many engineers are giving more interest to improving the internal combustion engine. Photo courtesy Quasiturbine. See more images of engines. The Quasiturbine engine, patented in , is just such an improvement. In this article, we'll introduce the Quasiturbine engine and answer the following questions:.
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