Once the fuel is vaporized into the air stream, the mixture is drawn into each cylinder as that cylinder begins its intake stroke. When the piston reaches the bottom of the cylinder, the intake valve closes and the piston begins moving up in the cylinder compressing the charge.
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Poppet valve - Wikipedia, the free encyclopedia
A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by s...
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Notice how the intake valve is open. It opens when the piston is going down sucking the air and gas mixture into the cylinder. The Intake Valve closes when the piston reaches the bottom and starts back in the up ward stroke or called the Compression stroke.
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When the intake valve is open on the engine, air is being sucked into the engine, so the air in the intake runner is moving rapidly toward the cylinder. When the intake valve closes suddenly, this air slams to a stop and stacks up on itself, forming an area of high pressure.
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Mechanically, the intake system typically consists of an intake valve, an intake port and manifold runner, a carburetor or throttle body, and it usually has some type of air filter. The illustration above is a representation of such a system.
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Variable valve timing - Wikipedia, the free encyclopedia
In internal combustion engines, variable valve timing , often abbreviated to VVT , is a generic term for an automobile piston engine technology. VVT allows the lift , duration or timing (in ...
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Acura Cylinder 4 Intake Valve Adjustment: Part 1. Part of the series: Car Maintenance: Valve Adjustment. For a valve adjustment on an Acura Integra, ...
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