Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-02-2011, 06:36 AM   #1 (permalink)
Bookworm
 
Join Date: Apr 2010
Location: Olympia
Posts: 127

Sylvio - '02 Audi allroad quattro Biturbo 6-spd
90 day: 21.08 mpg (US)

Focus - '17 Ford Focus SE
90 day: 45.64 mpg (US)
Thanks: 7
Thanked 29 Times in 21 Posts
Wastegate logic for economy?

Would it be practical or beneficial to set up the wastegate logic on a turbo motor so that the wastegate stays open until boost is called for?

The way I understand it, the exhaust is always routed through the turbine, which seems like it would take some energy, even when the engine doesn't need more intake pressure than is available via ambient pressure.

There would need to be two alternate routes for intake air, one through the turbo and one skipping the turbo, and some way to balance/mix/transition during changes in demand, but it seems like some combination of BOVs and DVs could be set up to make it happen.

The turbo would want some exhaust flow through it all the time, to keep it warmed up and turning so it would be ready to boost when called for, I suppose.

Ah, well, crap. Someday I'll learn to do a search before I write up a question...
Wastegate Actuator Add to Auto Fuel Efficiency*|*Automotive Discovery

Seems like someone with the right skills could possibly set up a wastegate spring so it would do a similar thing on a conventional system, though. Maybe?

__________________


Invalid argument techniques to watch for.
'48 C170
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-03-2011, 01:57 PM   #2 (permalink)
Master EcoModder
 
Join Date: Dec 2008
Location: South Jersey
Posts: 553

Little Blue - '98 Ford Escort ZX2 Cool
Team ZX2
90 day: 44.75 mpg (US)

Big Red - '00 Ford Excursion XLT
90 day: 15.53 mpg (US)
Thanks: 5
Thanked 45 Times in 29 Posts
A small amount of boost a cruising speed is helpfull for MPG. While accelerating, keep it is a low as possible.
Keep it simple, no need to get elaborate. The turbo helps overcome some pumping losses, maybe a programable boost control would be good for you?

__________________
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com