An improving design on the variable intake port of a 1.25l 4 valve single cylinder engine is conducted for optimizing the small and medium load performance of the engine.

对一1.25 L单缸4气门发动机进行可变进气的改进设计，以便优化发动机的中小负荷性能。

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In this paper the in-cylinder air motion and its interaction with combustion are studied under both motored and firing conditions by LDA in a single-cylinder 4-valve S. I. engine.

通常在发动机倒拖工况下测量和研究缸内气流运动，对于燃烧过程中缸内流动规律的测量和研究还很少。

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It's an overhead valve engine with a single camshaft that uses push rods to open and close the 16 valves.

FORBES: The Engine That Could