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.

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The Quasiturbine concept resulted from research that began with an intense evaluation of all engine concepts to note advantages, disadvantages and opportunities for improvement. During this exploratory process, the Saint-Hilaire team came to realize that a unique engine solution would be one that made improvements to the standard Wankel, or rotary, engine. Like rotary engines, the Quasiturbine engine is based on a rotor-and-housing design. But instead of three blades, the Quasiturbine rotor has four elements chained together, with combustion chambers located between each element and the walls of the housing.

Photo courtesy Quasiturbine. There are actually two different ways to configure this design -- one with carriages and one without carriages.

The simpler Quasiturbine model looks very much like a traditional rotary engine: A rotor turns inside a nearly oval-shaped housing. Notice, however, that the Quasiturbine rotor has four elements instead of three. The sides of the rotor seal against the sides of the housing, and the corners of the rotor seal against the inner periphery, dividing it into four chambers.

In a piston engine, one complete four-stroke cycle produces two complete revolutions of the crankshaft see How Car Engines Work: Internal Combustion. That means the power output of a piston engine is half a power stroke per one piston revolution. Instead, the four strokes of a typical piston engine are arranged sequentially around the oval housing. This animated graphic identifies each cycle. Notice that in this illustration the spark plug is located in one of the housing ports.

Photo-detonation is a superior combustion mode that requires more compression and greater sturdiness than piston or rotary engines can provide. Internal combustion engines fall into four categories based on how well air and fuel are mixed together in the combustion chamber and how the fuel is ignited. Type I includes engines in which the air and fuel mix thoroughly to form what is called a homogenous mixture. When a spark ignites the fuel, a hot flame sweeps through the mixture, burning the fuel as it goes.

This, of course, is the gasoline engine.


How Quasiturbine Engines Work

Pneumatic is used everywhere: It is safe, needs little maintenance, lasts long The Quasiturbine is a pure positive expansion machine. Quasiturbine Pneumatic Engine Remark on Pneumatic Efficiency An high efficiency pneumatic motor does not guaranty the high efficiency of the entire pneumatic system. All gas heat up during compression and cool down during relaxation. The cooling effect must not be under-estimated. As an example, a typical bar atm. In those temperature conditions at the entrance of a pneumatic motor, the efficiency is catastrophically low and the lubricant solidifies, increasing considerably the internal engine friction






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