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A new variable compression ratio mechanism is described. This mechanism displays high durability, fast response, precision control, and low cost. High fuel economy values and low emission levels are projected.

Hybrid electric vehicles provide the opportunity to greatly reduce fuel consumption, switch to non-petroleum based alternative fuels, provide large reductions in urban air pollution, and provide large reductions in greenhouse gas emissions. This paper presents the technological opportunities of these vehicle types, and the mission and goals of the U S Department of Energy's Hybrid Propulsion Systems Development Program.

Equations are presented for estimating the mileage and power requirements of future automobiles. The new equations are significantly easier to use and less time consuming than earlier mathematical methods. The equations are useful for integrated design development of super high mileage vehicles. The equations are additionally useful for quantifying the mileage gain and cost-effectiveness of an incremental design change. The equations are compatible with conventional, alternative fuel, electric, and hybrid vehicles.