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What is the composition of the valve train?

2 Answers

StJude

07/29/25 7:23am

1. The valve group mainly consists of valves, (valve guides, valve oil seals), valve springs, valve spring seats, valve locks, etc. 2. The valve drive group mainly consists of camshafts, valve lifters, valve rocker arms, rocker arm shafts, camshaft timing gears, valve tappets, valve push rods, etc. The engine valve train (internal combustion engine valve train) operates according to the working cycle and ignition sequence requirements of each cylinder in the engine, timing the opening and closing of the intake and exhaust valves of each cylinder to allow fresh combustible mixture.

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ClaireRose

08/12/25 10:42am

When it comes to the valve train, it's like the engine's respiratory system, primarily ensuring smooth intake and exhaust. The core components include the camshaft, which acts like the heart, controlling the opening and closing rhythm through rotation; the valves, divided into intake and exhaust valves, function like a person's nose and mouth, regulating the flow of air in and out; the rocker arms connect the camshaft and valves, serving as transmission levers; the springs help the valves return quickly; sometimes there are pushrods or lifters for power transmission. Overall, if these components work well together, the engine will be more powerful and fuel-efficient. During maintenance, attention should be paid to cleaning and lubrication to avoid carbon buildup blocking the valves or spring aging. I've seen a friend's car experience weak acceleration due to stuck valves, so timely inspection and replacement are necessary.

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