VALVE TRAIN Meaning and
Definition
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The term "valve train" refers to a crucial mechanical system found in internal combustion engines that controls the operation and movement of the intake and exhaust valves. It is responsible for timely opening and closing of these valves, allowing the entry of air-fuel mixture for ignition and the release of exhaust gases.
The valve train is composed of several integral components, working together to ensure harmonious valve operation. The key parts of the valve train include the camshaft, cam lobes, lifters or tappets, pushrods, rocker arms, and valves. The camshaft, driven by a timing belt or chain, rotates to push up the cam lobes, which in turn exert force on the lifters or tappets. These lifters transmit the movement to the pushrods, which act as connectors between the lifters and rocker arms. Finally, the rocker arms are responsible for converting the linear motion of the pushrods into the pivoting motion necessary to open and close the valves.
The valve train plays a crucial role in maintaining engine performance and efficiency. Precise timing and coordination of valve opening and closing events are crucial to ensure optimal fuel-air mixture intake, exhaust gas expulsion, and overall engine performance. As such, proper maintenance and adjustment of the valve train are essential to prevent valve damage, poor engine performance, and excessive fuel consumption.
In conclusion, the valve train is a vital mechanical system in internal combustion engines that governs the movement and timing of intake and exhaust valves. It works in synchronization with other engine components to ensure efficient engine operation and performance.
Etymology of VALVE TRAIN
The word "valve train" is a compound word comprised of the words "valve" and "train". Let's break it down:
1. Valve: This word can be traced back to the Latin word "valva", meaning "a folding door or gate". It was originally used to refer to a device that regulated the flow of a liquid or gas through an opening or closing action, similar to a door or gate.
2. Train: This word originated from the Old French word "train", meaning "to drag or draw". It was used to describe the act of pulling or moving something along. Over time, the word evolved to refer to a connected series of things or events.
When combined, "valve train" refers to a system in internal combustion engines and some other machinery that consists of a series of components, including valves, lifters, pushrods, and camshafts.
