1994-03-01

Introducing a High Efficiency Variable Positive Displacement Automotive Supercharger 940845

A variable, positive displacement supercharger, (VPDS™) is being developed for Diesel and spark ignition engines. Benefits include reduced emissions, improved fuel economy and low speed torque improvements.
Three US Patents have been issued on the concept, which is based on radially arranged rectangular pistons with pressure compensated seals. Displacement is varied by adjusting the eccentricity of the piston drive under control of engine electronics.
Design pressure can be delivered at all operating speeds while power consumption is proportional to air mass and pressure delivery. Overall Compressor efficiencies of 85% have been demonstrated, making the VPDS™ the highest efficiency supercharger known.
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