Small, Heavy Fuel, Compression Ignition Small UAV Engines

Award Information
Agency: Department of Defense
Branch: Army
Contract: W31P4Q-09-C-0294
Agency Tracking Number: 02SB2-0433
Amount: $199,960.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1069 Industrial Ave, P.O. Box 474, Glenbrook, NV, 89413
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Greg Stevenson
 Principal Investigator
 (775) 588-3086
Business Contact
 Greg Stevenson
Title: Business Development
Phone: (775) 588-3086
Research Institution
This Heavy Fuel Engine (HFE) proposal describes an innovative propulsion system that meets the near term Army FCS class II OAV propulsion system requirements. The proposed approach is an innovative Supercharged Injected 60 degree V-twin uniflow four-cycle design of 450cc cylinder capacity designated (SIV-2225). Unlike commercial off the shelf conversions, the proposed SIV-2225 overcomes small scale thermal and specific volume deficiencies by means of positive displacement built-in supercharge with high adiabatic and trapping efficiency resulting in scavenge air delivery ratios approaching 2:1. High thermal and combustion efficiencies are achieved by doubling the trapping volume prior to the compression stroke thereby significantly reducing the effective surface/volume ratio and associated heat losses. Internal pumping losses are kept to minimum due to the maximum port time area associated with uniflow sleeve design, which, affords up to 85% of the cylinder circumference for breathing. This equates to 4 times the breathing capacity when compared to overhead poppet valve designs. As a result this 4-cycle uniflow sleeve valve engine has a breathing capacity well beyond the 12,000 RPM range. In addition, the low profile cylinder head retains complete freedom of the combustion chamber, which is an invaluable feature when optimizing the required heavy fuel combustion system.

* Information listed above is at the time of submission. *

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