Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - "Pulse and DFCO" (deceleration fuel cut off) doesn't work

Christ · 01-15-2009, 11:55 PM

Frictional losses are most definitely the biggest culprit for engine braking... Imagine it this way -

You've got a 300 lb person sitting on your chest, and you're flat on your back on a hardwood floor, with your mouth and nose covered by a slightly porous wet rag. You're laboring to breathe at this point...

Remove that rag, but leave the fat guy. Now you can breathe freely, but your chest has trouble rising to get an "easy" breath...

When you open the throttle, you're just taking the rag off your engine's face - get it?

01-15-2009, 11:55 PM	#14 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	Frictional losses are most definitely the biggest culprit for engine braking... Imagine it this way - You've got a 300 lb person sitting on your chest, and you're flat on your back on a hardwood floor, with your mouth and nose covered by a slightly porous wet rag. You're laboring to breathe at this point... Remove that rag, but leave the fat guy. Now you can breathe freely, but your chest has trouble rising to get an "easy" breath... When you open the throttle, you're just taking the rag off your engine's face - get it? __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"