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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-07-2016, 03:51 PM   #1 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,319

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 186 Times in 127 Posts
Have You Guys Seen This One?

A spark-ignition engine with the efficiency of a diesel.





Itís rather like taking the Atkinson engine to the next level. A great deal more expansion than compression.

Back in the late 40s, aircraft engine designers played with turbocompounding Ė using expansion turbines to wring every last bit of work out of a pound of hot exhaust gas. And it worked, sorta. The engines of Shackleton bombers and B-29s were marvels of thermal efficiency. But they werenít reliable. They relied on gear reduction to match turbine RPM with engine RPM. Those stressed out gear trains were more of a danger to B-29 crews than Zeros.

Even earlier steam locomotives used compounding. The exhaust steam from one cylinder was ducted into another (larger diameter) cylinder and allowed to expand some more. This worked but they were tricky to operate using 1920s controls.

But this uses the older idea to make an engine that does not have a stressed out system.

Ilmor is highly respected in the auto world.

__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
The Following 5 Users Say Thank You to Big Dave For This Useful Post:
BabyDiesel (01-09-2016), pgfpro (01-07-2016), RedDevil (01-07-2016), RustyLugNut (01-07-2016), Xist (01-11-2016)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-07-2016, 04:27 PM   #2 (permalink)
Master EcoModder
 
Join Date: Nov 2012
Location: San Diego, California
Posts: 944
Thanks: 235
Thanked 344 Times in 240 Posts
This has been around a few decades.

I'm not sure it is going to be a market success but their mention of it's use in hybrid drives and stationary power applications shows they understand the limitations of the engine.
  Reply With Quote
Old 01-07-2016, 04:34 PM   #3 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2008
Location: up north
Posts: 196
Thanks: 4
Thanked 34 Times in 26 Posts
ferd. porsche tried it too...

Ferdinand Porsche tried something similar, with some pistons super charging other pistons.

I think it was given up as overly complex and had overheating problems.


I just bought a Mazda 3 with the Skyactiv system. Instead of typical gasser compression ratio of 9:1 or 10:1, the US version has 13:1, and the euro or japanese version is 14:1.

To prevent engine destroying pre-ignition, they use active changes in the cam timing.

So far, it works a treat.
__________________
2004 VW TDI PD on bio

want to build 150 mpg diesel streamliner.
  Reply With Quote
Old 01-07-2016, 04:44 PM   #4 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Hmm... That looks very familiar, but not from the same company. I can't remember where, but I'd put money on this not being a new idea.
__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
Old 01-07-2016, 05:21 PM   #5 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 9,593

Acura TSX - '06 Acura TSX
90 day: 28.24 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 26.58 mpg (US)
Thanks: 3,308
Thanked 3,633 Times in 2,719 Posts
Seems a good idea. What are the limitations?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 01-07-2016, 06:57 PM   #6 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Quote:
Originally Posted by darcane View Post
Hmm... That looks very familiar, but not from the same company. I can't remember where, but I'd put money on this not being a new idea.
There we go. Nearly identical design circa 1879:
The Deutz compound engine: 1879


Patent issued to a Gottlieb Daimler (yes, that Daimler). Link above has a variety of other similar designs for compound engines. I believe these were popular back then since metallurgy wouldn't allow for the high compression of modern engines, so alternatives were needed to harness more energy from the fuel.

__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
The Following User Says Thank You to darcane For This Useful Post:
Xist (01-11-2016)
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