DOHC or Twin Cam engine 4-cylinder 16-valve DOHC engine DOHC means Double OverHead Cam, or sometimes it could be called "Twin Cam". A DOHC setup is used in most of newer cars. Since it's possible to install multiple valves per cylinder and place intake valves on the opposite side from exhaust vales, a DOHC engine can "breathe" better, meaning that it can produce more horsepower with smaller engine volume. Compare: The 3.5-liter V6 DOHC engine of 2003 Nissan Pathfinder has 240 hp, similar to 245 hp of the 5.9-liter V8 OHV engine of 2003 Dodge Durango. Pros: High efficiency, possible to install multiple valves per cylinder and adopt variable timing. Cons: More complex and more expensive design. by Vlad Samarin
PositiveNegativeInteresting Cars don’t leave a mess on the road. Cars don’t make horse poo but they make a mess by pollution Car designers want to make cars that don’t make pollution. Cars go faster and longer distances than horses. But for a car to do that you need some oil. People dig miles under ground to get oil. Cars are more indestructible than horses But then you have to dig up a hole lot of rock and compress it. There is nothing good about pollution.
For a awesome time line go to http://www.yourdiscovery.com/cars/timelin e/ click on the link http://www.yourdiscovery.com/cars/timelin e/ “click on me’’. Said the link.
Future cars In the future designers hope to make cars that won’t make pollution.
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