It actually began to occur long before humans invented agriculture, smoke stacks, and gasoline-fueled internal combustion engines.
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High-efficiency internal combustion engines combined with lightweight materials can dramatically increase fuel efficiency in cars and trucks.
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And fuel cells are more efficient than internal combustion engines because they do not create as much unused heat.
This is from a company that sold 21 million internal combustion engines for cars, motorcycles, lawnmowers and boats last year.
Internal combustion engines have been around for over 100 years, but they generally are only 10 to 20 percent efficient.
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Hybrids, already being sold by Honda and Toyota by the thousands, use battery-powered electric motors to assist traditional internal combustion engines.
Petroleum caught on early as the main fuel source for internal combustion engines because it was plentiful and cheap to refine.
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Technologies such as internal combustion engines and gas turbines will continue to improve gradually in efficiency but they are familiar and developed.
With the loss of inefficient internal combustion engines along with the use of heat-pumps and better insulation in the building sector etc.
The key to thermal efficiency for internal combustion engines is compression ratio.
The power production process is environmentally friendly and up to 30 percent efficient while typical internal combustion engines are 25 to 40 percent efficient.
"We really and truly expect that fuel cells are going to double the fuel efficiency of the best internal combustion engines and in some cases triple it, " Roan said.
And we are currently developing a wide range of advanced technology vehicles, including more hybrids, more diesel engines, hydrogen internal combustion engines and even fuel cells later on down the road.
Early internal combustion engines (get out and crank, anyone)?
The strong showing of conventional vehicles in the top twelve is a testament to how serious manufacturers have gotten about recasting these vehicles as fuel-sippers with transmission refinements, weight savings, and sophisticated internal combustion engines.
Now, it's true that amazing gains are being made in the efficiency of internal combustion engines, both gas and diesel: direct injection, cylinder deactivation, stop-start, eco-mode throttle mapping, to name a few of the recent applied technologies.
Dr. Vladimir Kliatzkin, a scientist with more than 40 years of experience in energy production and accumulation systems for aviation, internal combustion engines and hybrid systems, originally developed the innovative wind-power technology and is currently commercializing various applications incorporating the technology through WinFlex.
But in the short term, researchers are working on reformers which produce hydrogen aboard vehicles by extracting the gas from methanol or other hydrocarbon fuels -- a process that can release pollutants, though at far lower levels than internal combustion engines, Roan said.
On the other hand, this conflation makes far more sense in the long term, as our electrical grid becomes more sophisticated, and as electric vehicles begin the inevitable switch from internal combustion engines to electric motors or some other renewable source of power.
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In SNG's case, the gas can also be compressed and used to fuel cars with internal-combustion engines.
Likewise, BMW withdrew its own test fleet of 100 cars with internal-combustion engines modified to run on hydrogen.
The clear trend at this show is toward green cars that go the extra mile with regular old internal-combustion engines.
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It is also researching fuel cells as an alternative to internal-combustion engines.
Amazingly complex internal-combustion engines give great performance and clean air, and the new hybrids (gasoline and electric) go 21 kilometers on a liter.
Instead, I leaned in farther in a panicked attempt to find the nearest sidewalk and escape the internal-combustion engines threatening to crush me from behind.
These devices, which work by combining hydrogen with oxygen from the air to produce electricity, are popular candidates to replace internal-combustion engines in road vehicles.
Oil is found in relatively few places, and its energy density, pumpability and ease of use in internal-combustion engines makes it particularly well suited as a transportation fuel.
In simplistic terms, that user-friendly software did the same for logic engines what automatic transmissions, power steering and power brakes did to tame the internal combustion engine and launch the age of the automobile.
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