Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.
Engineering Explained on MSN
How VTEC works - Honda horsepower!
What is VTEC? How does VTEC work? VTEC, or variable valve timing and lift electronic control is used to increase airflow ...
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