Archives




View Full Version : How to engage DFCO?


herschen
04-20-2008, 11:59 PM
How do I engage DFCO and why would this be better than just turning off my engine and coasting down a hill (albeit behind cars, so I would have to brake)? And can someone explain pulse and glide to me? I've been setting cruise control at 40 mph, disengaging the clutch, waiting until the car coasted to around 35 mph and then reengaging and resuming cruise control. Is that P&G?

Shrek
04-21-2008, 02:14 AM
How do I engage DFCO and why would this be better than just turning off my engine and coasting down a hill (albeit behind cars, so I would have to brake)? And can someone explain pulse and glide to me? I've been setting cruise control at 40 mph, disengaging the clutch, waiting until the car coasted to around 35 mph and then reengaging and resuming cruise control. Is that P&G?

I don't dare to FAS in stop-go rushtraffic. The brake is very heavy when it run out of assist (I'm looking for an affordable electric vacuum-pump to fix that...)

I think using the CC for the pulse-part of the P&G should be quite OK. CC's accelerate modestly to get up to speed, which is OK

P&G is any technique that exploits that the ICE is much more efficient at 70% load, than at 20% load where you normally operate at steady cruise.

Right Lane Cruiser
04-21-2008, 08:29 AM
Shrek, remember that braking vacuum is depleted by complete cycles of brake pedal application -- if you press and hold the brake that is one braking event of the 3-4 you'll get before you run out. Additionally, the parking brake (though only the rear brakes) is cable operated and can be applied for light braking as you desire without touching the vacuum reserve at all.

I use both of these techniques heavily.



Copyright 2006 Clean MPG, LLC. All Rights Reserved.