Full Content is available to subscribers

Subscribe/Learn More  >

Quasiturbine: Low RPM High Torque Pressure Driven Turbine for Top Efficiency Power Modulation

[+] Author Affiliations
Gilles Saint-Hilaire, Roxan Saint-Hilaire, Ylian Saint-Hilaire

Quasiturbine Agence, Montréal, QC, Canada

Paper No. GT2007-27088, pp. 17-26; 10 pages
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 3: Turbo Expo 2007
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4792-6 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by Quasiturbine Agence


The Quasiturbine turbo-machine is a pressure driven, continuous torque and symmetrically deformable spinning wheel. Excluding conventional turbines, the next step in the world of engine research is to make the gas engines as efficient as the diesel engines and the diesel engines as clean (or better) as the gas engines. Turbine characteristics help achieving this goal. The Quasiturbine (Qurbine or Kyotoengine) is a new engine technology that was conceived in early 1990 and patented in 1996 and later. The Quasiturbine is inspired by the turbine, perfects the piston and improves upon the Wankel engine. Efficient and compact, the Quasiturbine is also an engine concept optimization theory based on «volume pulse shaping» at design. While current technologies adapt combustion processes to engine design, the Quasiturbine theory tends to adapt the engine design to combustion processes. It is a non-eccentric crankshaft, true rotary engine (no piston like movement), that uses a 4 face articulated rotor with a free and accessible center, rotating without vibration nor propulsive dead time and producing a strong torque at low RPM under a variety of modes and fuels. The Quasiturbine goes along the best modern engine development strategy, which is to get as many ignitions as possible per minute, with a mechanical device rotating as slowly as possible. Quasiturbine allows designs with up to «7 conceptual degrees of freedom», substantially more than conventional turbine or piston engine, permitting to better shape the compression and relaxation volume pulse and further improved optimization. Taking full advantage of its unique short and fast linear ramp volume pulsed properties, its AC Model is a natural HCCI «detonation - knocking» engine. Such a detonation Quasiturbine has very little low-power-efficiency-penalty, is multi-fuel compatible (including direct hydrogen combustion), offers a drastic reduction in the overall propulsion system weight, size, maintenance and cost. Because Quasiturbine cycle is pressure driven instead of aerodynamically driven, it has a comparatively flat high efficiency characteristic in regard to RPM, load and power, which makes it most suitable for power modulation applications like in transportation and windmill energy storage and recovery systems. Used in Stirling and Brayton cycles, the Quasiturbine offers new ways to recover and transform thermal energy.

Copyright © 2007 by Quasiturbine Agence
Topics: Torque , Pressure , Turbines



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In