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Future Engine Technology Series

The Quasiturbine

http://quasiturbine.promci.qc.ca/QTIndex.html

 

The best harmonization technology between
* Energy * Fossil fuels * Electricity * Transportation * Environment * Economic Development *

QUASITURBINE ZERO VIBRATION -
CONTINUOUS COMBUSTION ROTARY ENGINE, COMPRESSOR AND PUMP
(Patent USA  6,164,263 -  See the USPTO data base or 8pagesQTPatent.pdf)

The Quasiturbine is at the crossroad of the 3 modern engines :
Inspired by the turbine, it perfects the piston, and improves on the Wankel.
The Quasiturbine is a continuous flow engine at intake and exhaust.
An engine's piston completes 4 strokes in two rotations, the Quasiturbine completes 32 !

• High torque, low RPM, zero vibration, potentially oil free, fast acceleration, less noise,
  less pollution, and high power density in volume and weight

• Engine for hydraulic, pneumatic, steam, gasoline, diesel, natural gas,
  ... photo-detonation mode and hydrogen compatible

• Compressor or pump without any check valve or obstruction

• The Qurbine : An environmentally friendly engine !
  

While most rotary engines use the principle of volume variation between a curve and a moving cord, this new engine concept makes use of a "four degrees of freedom  X, Y, q, ø1, ø2, ø3, ø4" rotor, trapped inside an internal housing contour, and does not require a central shaft or support. 

This concept is the result of research for an hybrid turbine-piston engine with a fixed center of gravity during rotation (zero vibration). The invention is an assembly of four carriages supporting the pivots of a four-element, variable-shape rotor. This rotor rolls on the inner surface of a profiled stator shaped like a skating rink (just like a roller bearing). During the rotation, the rotor components align alternatively in a lozenge and a square configuration. This device can act as a pump, a compressor, a flow meter, or as an engine (including pressurized fluid mechanical energy converter). It is self-synchronized and uses no valves (only fixed ports in the stator or alternatively, ports on the lateral side covers). Central support of the rotor is not required for most applications. Four cycles are completed in every rotation. The maximum geometrical compression ratio is a function of the maximum diagonal ratio selected at design. 

As for turbine engines, ignition is only required initially, since combustion is kept continuous between successive cycles by way of an ignition transfer slot or cavity. The continuous combustion produces an enhanced dynamic compression ratio. The device incorporates few parts. It has an excellent torque continuity even at low rpm (Due to its high torque pulsation rate, this device requires less flywheel effect and gearbox ratio for most applications). 

It is suitable for uses such as aeronautics, where high reliability is required. Having no oil pan, it can be operated in completely submerged or hostile environments. The asymmetry of the strokes and the precocity of the mixture intake and gas expansion (without excess volume during expansion) allow for a better initial mechanical energy conversion. A fast reduction in the combustion chamber of the temperature, the pressure and the confinement time leads to less NO_x production, and less heat transfer toward the engine block, all contributing to improve the power density and the efficiency over the piston engine. 

The Quasiturbine meets the hydrogen engine criteria.