
fuelefficiency etiketine sahip kayıtlar gösteriliyor. Tüm kayıtları göster
fuelefficiency etiketine sahip kayıtlar gösteriliyor. Tüm kayıtları göster
7 Mart 2009 Cumartesi
31 Ekim 2007 Çarşamba
Most Fuel Efficient Cars
CRChair and I were talking recently about how despite all the talk about saving money on gas, it is not easy to find even small cars which really get a good MPG (miles per gallon). So I was happy to come across this list which holds the 82 most fuel-efficient cars for sale in America and their MPG rating. I was even more happy to see that the vehicle I chose - the Pontiac Vibe - is #18 on the list.
11 Mayıs 2007 Cuma
New Engine to Transform Gasoline Cars?
Science Daily is claiming that a new part of the internal combustion engine called "variable valve actuation" could transform the industry.
Maybe the future is not in the electric car after all. At least not the ones envisioned recently. Maybe instead it is an ultra-efficient hybrid-gasoline engine.
In today's internal combustion engines, the pistons turn a crankshaft, which is linked to a camshaft that opens and closes the valves, directing the flow of air and exhaust into and out of the cylinders. The new method would eliminate the mechanism linking the crankshaft to the camshaft, providing an independent control system for the valves.The technique could allegedly increase gas-burning efficiency by 15 to 20 percent, making gasoline-based cars as efficient as diesel. It also leads to more completely combusted fuels, meaning fewer greenhouse gases emitted.
Because the valves' timing would no longer be restricted by the pistons' movement, they could be more finely tuned to allow more efficient combustion of diesel, gasoline and alternative fuels, such as ethanol and biodiesel, Shaver said.
Maybe the future is not in the electric car after all. At least not the ones envisioned recently. Maybe instead it is an ultra-efficient hybrid-gasoline engine.
Etiketler:
fuelefficiency,
gas,
gasoline,
hybridengines,
science
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