Tappet is a term commonly used in automotive engineering and refers to a specific component within an internal combustion engine. The tappet, also known as a valve lifter, is responsible for transmitting the motion from the camshaft to the engine's valves.
The tappet is typically a small cylindrical or rectangular part that sits between the camshaft and the valve. Its main purpose is to transfer the rotational motion of the camshaft into linear motion, which opens and closes the engine's valves at the appropriate times. This allows the intake and exhaust valves to open and close in synchronization with the engine's piston movements.
The tappet moves up and down within the engine block or cylinder head, following the profile of the camshaft lobes. It is usually designed to minimize friction and wear, often utilizing a hydraulic system or roller bearings. Some modern engines may even employ hydraulic tappets that automatically adjust for valve clearance, ensuring optimal performance and minimizing maintenance requirements.
By properly timing the opening and closing of the engine's valves, the tappet plays a crucial role in controlling the intake of air and fuel into the cylinders and the expulsion of exhaust gases. It is an essential component in the overall operation and efficiency of an internal combustion engine.
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