Valve timing

Two-Stroke engine showing ports in the cylinder walls. The timing cannot be varied

In a piston engine, the valve timing is the precise timing of the opening and closing of the valves. In an internal combustion engine these are usually poppet valves and in a steam engine they are usually slide valves or piston valves.

单词	Valve timing
释义	Valve timing 英语百科 Valve timing In a piston engine, the valve timing is the precise timing of the opening and closing of the valves. In an internal combustion engine these are usually poppet valves and in a steam engine they are usually slide valves or piston valves.
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