A tremendous amount of R&D money in the US has gone into improving fuel efficiencies of gasoline engines. Americans have a history of thumbing their noses at diesel engines for cars and pickup trucks. Thanks in no small part to Generally screwed up Motors (GM). Thereby the emphasis, in the US, on gas engines. The gasoline engine had much, much, room for improvement, so, in a way , it was relatively easy to vastly improve its efficiency. We are the benefactors of this but only one thing stands in my way. That being General Motors track record. They've produced a lot of great stuff and almost as much junk. In my humble opinion anyway. I'll be waiting, and watching. I honestly hope they have some winners coming along soon.(;>))
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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