www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Order your TDIClub merchandise and help support TDIClub


Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI News/Tech

TDI News/Tech This Forum is for the posting of TDI news related items.

Reply
 
Thread Tools
Old November 8th, 2019, 13:49   #16
kjclow
Veteran Member
 
Join Date: Apr 2003
Location: Charlotte, NC
Fuel Economy: 55 max / 44 avg on beetle ~37 on JSW
Default

Not saying it won't work but it almost sounds like the hype of the 100 mpg carbs.
__________________
2010 silver/black JSW TDI with DSG, 2011 red Golf TDI with dsg, 2003 red/gray Passat 1.8l gasser
kjclow is online now   Reply With Quote
Old November 8th, 2019, 14:15   #17
Lightflyer1
Veteran Member
 
Lightflyer1's Avatar
 
Join Date: Sep 2005
Location: Round Rock, Texas
Default

Did that hype come from Sandia National Labs?

It should give the emissions a much much easier job. With soot being reduced 50-100% and NOx dropping a lot as well, they would have to work a lot less. DPF regens at 1k mile increments instead of 200 miles?
__________________
How to post pics:http://forums.tdiclub.com/showthread...t=post+picture
Lightflyer1 is offline   Reply With Quote
Old November 21st, 2019, 11:29   #18
woofie2
Veteran Member
 
woofie2's Avatar
 
Join Date: Feb 2004
Location: Republic of Southern Illinois
Fuel Economy: 25/22/23
Default

With Sandia's research aimed at larger diesel engines, I suspect applications in shipping, generators and locomotive systems as their money point. it will take Bosio or someone to build a smaller engine injector on this design.

Likely 2-3 years until anyone goes to mass production on the new injectors, my guess is that there will need to be some redesign on engines from CAT, GE, Bosch, etc to incorporate this new injector.
__________________
Traitor went to a RAM
Fuelly link
woofie2 is offline   Reply With Quote
Old November 21st, 2019, 11:40   #19
alext91
Veteran Member
 
alext91's Avatar
Default

Wow, Drummond Biles was one of my TAs in college! Really cool to see his name on this!

Sent from my SM-G960U using Tapatalk
__________________
2013 Jetta Sportwagen TDI 6MT Pano, Candy White
2015 Golf TDI S 4DR 6MT (Wife's)
2015 Yamaha FJ-09
1999.5 Jetta TDI Tornado Red (Sold)
1996 Yamaha FZR 600 (Sold)
alext91 is online now   Reply With Quote
Old November 26th, 2019, 11:14   #20
SilverGhost
Veteran Member
 
SilverGhost's Avatar
 
Join Date: Mar 2005
Location: Back in So Flo - St Lucie
Default

Well, the piston bowl is mainly there to work with injector spray to promote fuel/air mixing. The ducted injector removes this need. Without the bowl the piston can stop further from head or head can have a pocket.

Not an easy retrofit, but 'simple' change during design stage.

Jason
SilverGhost is offline   Reply With Quote
Old November 26th, 2019, 13:11   #21
casioqv
Veteran Member
 
Join Date: Aug 2015
Location: California
Default

I think the TDI or other small direct injection engines should be simple to retrofit in this manner, by putting the ducts inside the existing piston bowl. It would essentially be just a new injector nozzle with an extra part, that will require removal of the head. The new nozzles will have six machined jets instead of a circular spray, and exposed threads on the bottom. After installing the injectors with the head removed, you could screw on a fan shaped six-way duct designed to fit neatly into the stock bowl.

Further improvements could be had with an entirely new piston, machined in a 'starburst' pattern to have a spot for each duct.



Overall it's pretty shocking that something this simple works so much better than the highly optimized current approach.
__________________
2001 Golf TDI - 02m 6 speed swap; +ASR/EDL; panzer plate
2016 e-Golf
casioqv is offline   Reply With Quote
Old November 28th, 2019, 19:37   #22
GoFaster
Moderator at Large
 
Join Date: Jun 1999
Location: Brampton, Ontario, Canada
Default

For sure any proposed modification like this would have to be designed in tandem with revising the shape of the piston top. The trouble on smaller engines is that the injector is surrounded by valves (and a glow plug tip) and there is not much real estate to work with.

The photo in the opening shot of the article shows this device in somebody's fingertips ... the whole deal looks to be (guess) 20mm across, and looks really intricate ... those socket-head screws are really really small. But there isn't that much real estate available on an automotive cylinder head. It would have to be even smaller.

Unless ... you re-think the way the injector sprays, and build something that achieves this function directly into the cylinder head itself.
__________________
Brian P.
formerly ... 2006 Jetta TDI 5-sp, Spice Red, Unitronics stage 1, 0.681 5th gear.
and before that ... 1996 Passat TDI, Silk Blue
GoFaster is offline   Reply With Quote
Old November 30th, 2019, 15:35   #23
DPM
Veteran Member
 
Join Date: Mar 2001
Location: Newtownards, N. Ireland
Fuel Economy: 38.5- 47 Forester, Citroen 55- 63
Default

I'm wondering if you could build it into the injector- instead of minimising the tip of the nozzle, give it lots of mass then "core" a ring out axially and drill a larger outer hole and then the smaller EDM'd injection hole concentrically for each hole..
DPM is offline   Reply With Quote
Old December 1st, 2019, 07:35   #24
Dannyboy
Veteran Member
 
Dannyboy's Avatar
 
Join Date: May 2013
Location: Winnipeg,MB
Fuel Economy: All good on the motion lotion
Default

I remember seeing the paper on this back in 2017, interesting read but like what Go-faster said it's going to be difficult to engineer a duct into a relatively small area that will effectively work, going to have to completely redesign the head and piston bowl to accommodate it. With electrification rolling out at VW , no point spending money on something that's going to be obsolete in the near future. If VW wasn't caught with their pants down back in 2015 , they very well may have had the time and money to develop this. They are beginning to distance themselves from diesel now
Dannyboy is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
BorgWarner develops new turbocharger to help reduce diesel emissions buckeye96 TDI News/Tech 12 July 10th, 2008 12:04
B20- ULSD cut emissions greatly NHTDI Alternative Diesel Fuels (Biodiesel, WVO, SVO, BTL, GTL etc) 1 January 9th, 2005 07:39
OT: Ford develops backup plan for diesel emissions dilt1 TDI News/Tech 4 December 16th, 2002 09:57
Enviro Cat Reduces diesel emissions... Gary Miyakawa VW MKIV-A4 TDIs (VE and PD) 1 January 13th, 2000 05:22


All times are GMT -7. The time now is 08:33.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.15606 seconds with 11 queries
[Output: 92.18 Kb. compressed to 78.91 Kb. by saving 13.27 Kb. (14.39%)]