Energy source
Main article: Alternative fuel vehicle
One major problem in developing cleaner, energy efficient automobiles is the source of power to drive the engine. A variety of alternative fuel vehicles have been proposed or sold, including electric cars, hydrogen cars, and compressed-air cars.
Energy savers
Various technologies have been developed and utilized to increase the energy efficiency of conventional cars or supplement them, resulting in energy savings.
Regenerative braking recaptures energy that would otherwise be lost as waste heat from the brake pads.
BMW's Turbosteamer technology to harness the heat generated by conventional internal combustion engines and use it to generate mechanical energy [1], which can increase in fuel efficiency by 15%. [2]
Compressed air Hybrid is an engine made by researchers at Brunel University, UK, which forces highly compressed air into the engine, which they claim reduces fuel consumption by 30%.[3]
Utilization of waste heat from D.W. as useful mechanical energy through exhaust powered steam, stirling engines, thermal diodes, etc..[1]
Using computational fluid dynamics in the design stage can produce vehicles which take significantly less energy to push through the air, a major consideration at highway speeds. The Volkswagen 1-litre car and Aptera hybrid car are examples of ultra-low-drag vehicles.
Installing Vortex prevention devices at the back of the roof of a car reduces drag and therefore improve fuel efficiency. [2]
Main article: Alternative fuel vehicle
One major problem in developing cleaner, energy efficient automobiles is the source of power to drive the engine. A variety of alternative fuel vehicles have been proposed or sold, including electric cars, hydrogen cars, and compressed-air cars.
Energy savers
Various technologies have been developed and utilized to increase the energy efficiency of conventional cars or supplement them, resulting in energy savings.
Regenerative braking recaptures energy that would otherwise be lost as waste heat from the brake pads.
BMW's Turbosteamer technology to harness the heat generated by conventional internal combustion engines and use it to generate mechanical energy [1], which can increase in fuel efficiency by 15%. [2]
Compressed air Hybrid is an engine made by researchers at Brunel University, UK, which forces highly compressed air into the engine, which they claim reduces fuel consumption by 30%.[3]
Utilization of waste heat from D.W. as useful mechanical energy through exhaust powered steam, stirling engines, thermal diodes, etc..[1]
Using computational fluid dynamics in the design stage can produce vehicles which take significantly less energy to push through the air, a major consideration at highway speeds. The Volkswagen 1-litre car and Aptera hybrid car are examples of ultra-low-drag vehicles.
Installing Vortex prevention devices at the back of the roof of a car reduces drag and therefore improve fuel efficiency. [2]
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