早期的控制系统，就是人们所知道的“开式”系统，因为它的加机油管盖是开式的，或者说因其与大气连通。

The early system were known as open systems, because the oil-filler cap was open, or vented to the atmosphere.

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形成使吸附罐(53)的内部与大气一侧连通的通孔(54)。使吸附罐(53)与发动机(9)的进气系统部件(14)连通。

A via hole (54) is formed to make the inner of the canister (53) communicate with one side of air, which makes the canister (53) communicate with the intake system part (14) of the engine (9).

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