However, the range it can control is small and itscontrolling freedom is limited.The mechanism of the second one is to switch on oroff the EGR valve through controlling the vacuum.

　
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  • 氣電式系統是通過(guò)控制真空管路的通/斷或者真空度,來(lái)控制EGR閥的開(kāi)/關(guān),由此控制在循環(huán)的廢氣流量。
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