Engine Poppet Valve Tappet

Engine poppet valve tappets, also known as valve lifters or cam followers, are components found in internal combustion engines. They play a crucial role in the operation of the engine's valves.

Poppet valves are commonly used in most modern engines to control the intake and exhaust of air and fuel. These valves are opened and closed by the camshaft, which is driven by the engine's crankshaft. The camshaft has lobes that push against the tappets, causing them to move up and down.

The tappets are cylindrical components that sit on top of the engine's valve stems. They are designed to transfer the motion from the camshaft to the valves. When the camshaft lobe pushes against the tappet, it lifts the valve off its seat, allowing air and fuel to enter the combustion chamber during the intake stroke. Similarly, during the exhaust stroke, the tappet pushes the valve back onto its seat, sealing the combustion chamber and allowing the exhaust gases to exit.

Tappets are typically made of hardened steel or other durable materials to withstand the constant contact and pressure from the camshaft. They are also designed to minimize friction and wear, as they are subjected to high temperatures and forces within the engine.

Regular maintenance and proper lubrication are essential for the longevity and optimal performance of engine poppet valve tappets. If tappets become worn or damaged, they may produce excessive noise, affect valve timing, or cause other engine performance issues. In such cases, they may need to be inspected, adjusted, or replaced by a qualified mechanic.

Overall, engine poppet valve tappets are critical components that ensure the proper operation of an internal combustion engine's valves, allowing for efficient combustion and power generation.