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Right now there are tiny solenoids that control the flow of vacuum between the pods and the rest of the system (its right near the fiber optic spider web looking thing for lighting).
Replacing the pods with big solenoids is trivial, however a solenoid is either on or off...A servo can be rotated in any degree (up to 360) in software using PWM. This way we can control things with a fine-grained level of detail all in software, and enable things like ECO mode and AC + recirc in the summer (something that I'm not convinced happens with the current system although i'm not a ACC II genius).
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Java Developer/Linux SysAdmin
Current:
*1984 300D ~200K,1989 MR2 250K, 2012 Ford Fusion 4.5K (fiance's car to replace the uber-unsafe cavalier)
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Past: 1998 Chevy Cavalier ,2005 Saab 9-3 2.0T, 1996 Mazda Protege, 1974 Porsche 914 2.0, 1997 Land Rover Discovery 4.0L/5Speed, 1995 Jeep Wrangler
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