VGT has completed two research phases, both of which support the commercial viability of the RoundEngine.

[1] Dr. Ghazi Karim, Ph.D , a world renowned combustion engine specialist, and Dr. O. M. Bade Shrestha, both of University of Calgary, completed an independent assessment in 2001.

Key aspects of variable geometry toroidal engine technology to consider are as follows:

• The modeling was completed by modifying a performance predictive model on combustion engines previously developed by the University.
• The scope of the analysis was limited due to the conceptual stage of the engine and the ability to vary a number of design and operational features. No comparison to existing combustion engines was completed.
• The major conclusion was that “ … results, which relate to the performance of a specific version of the VGT engine having two pistons, showed clearly the engine to be operational and capable of producing power over a wide range of operating and design conditions …”

For access to this report click here.

[2] In 2002, VGT developed a prototype engine, the power source for which was compressed air. The 625 cc, single piston RoundEngine was designed to test mechanical aspects of the engine’s unique geometry and to prove adequate compression, and thus torque and horsepower could be achieved. Detailed drawings were limited to the toroid, main disk, drive shaft and timing disk. The balance of the air-powered prototype was built based on judgment of Mr. Pekau and a technical associate. Test results were extremely encouraging, especially in light of the fact that the engine was not close to being optimized.

Current Research
In 2004/05, VGT converted the air-powered motor to a combustion prototype as a cost-effective means of testing and evaluating various components. VGT is currently working on a new combustion prototype.

How can VGT apply this RoundEngine Technology in Future Applications?