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Diesel vs. Gas
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Posted by brian on November 16, 2000 at 12:57:53 from (136.2.1.101):
Why is the diesel engine noisier than a gas combustion engine? Diesel fuel is injected into the cylinder which had the air compressed at about 17:1 by the piston and the resulting heated air fires. With the gas engine, gas & air are compressed at 7.5: 1 and a spark plug fires the cylinder. After that, the cam, crank, piston, rods, etc. part of the engines are the same ( I thought). What makes the noise? I need an education.Thanks.
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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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