11-01-2019, 11:44 AM
|
#1 (permalink)
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,585 Times in 1,553 Posts
|
Turbos are going electric—and becoming part of hybrid powertrains
Interesting article on how hybrid electric turbos are moving to mainstream vehicles. For those that don't know, formula 1 has been using these for years now.
https://www.greencarreports.com/news...id-powertrains
|
|
|
The Following 3 Users Say Thank You to Daox For This Useful Post:
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
11-01-2019, 12:21 PM
|
#2 (permalink)
|
Master EcoModder
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,652
Thanks: 300
Thanked 1,176 Times in 806 Posts
|
That's cool. At first I assumed they meet the turbo was powered by electricity entirely rather than exhaust and thought how dumb is that. But being a hybrid exhaust/electric makes more sense. Never give up taking free energy out of the exhaust.
|
|
|
11-03-2019, 01:02 PM
|
#3 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,561
Thanks: 7,736
Thanked 8,554 Times in 7,041 Posts
|
Beyond that, being electric it can switch from regen to boost instantly. BMW used this with a small secondary turbo that just eliminated lagging.
I guess TFA says that.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
Last edited by freebeard; 11-03-2019 at 01:10 PM..
|
|
|
06-14-2020, 01:49 AM
|
#4 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
|
Since BMW and Formula 1 were mentioned, it's worth to remind BMW was the last engine supplier to have ever used a production-based engine. AFAIK it was also the last 4-pot to race at Formula 1, and was more plagued by turbo-lag than some V6 counterparts which resorted to a pair of smaller turbochargers instead of a larger single one.
Well, even though I wouldn't hold my breath for another production engine to be turned into a Formula 1 powerplant, maybe a more effective turbo-lag mitigation can increase the acceptance not only of downsizing in general but also of a smaller amount of cylinders within some random displacement range, such as the 2.7L engines fitted to the 4-cyl Silverado and the V6 F-150.
|
|
|
06-14-2020, 02:06 AM
|
#5 (permalink)
|
Human Environmentalist
Join Date: Aug 2010
Location: Oregon
Posts: 12,390
Thanks: 4,187
Thanked 4,378 Times in 3,353 Posts
|
I'd like to see AI racing. Perhaps what is learned on the track can be useful in future iterations of autonomous driving.
|
|
|
06-14-2020, 04:47 PM
|
#6 (permalink)
|
Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299
Thanks: 2,373
Thanked 2,172 Times in 1,469 Posts
|
That's really cool. A mild hybrid for cruising and a relatively simple system for performance boost. Engineering is as cool as mechanics and hacking.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
|
|
|
06-15-2020, 10:05 AM
|
#7 (permalink)
|
home of the odd vehicles
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,874
Thanks: 495
Thanked 863 Times in 650 Posts
|
Quote:
Originally Posted by freebeard
Beyond that, being electric it can switch from regen to boost instantly. BMW used this with a small secondary turbo that just eliminated lagging.
I guess TFA says that.
|
Primarily this reduces the temperature of the intake air, likely a good thing for detonation and power
|
|
|
06-17-2020, 07:07 PM
|
#8 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
|
Quote:
Originally Posted by rmay635703
likely a good thing for detonation and power
|
That's a good point. On a sidenote, the increased cooling is one of the reasons why ethanol has been more popular among high-performance operators.
|
|
|
07-01-2020, 03:42 AM
|
#9 (permalink)
|
Master EcoModder
Join Date: Jan 2012
Location: United States
Posts: 1,756
Thanks: 104
Thanked 407 Times in 312 Posts
|
This kind of setup likely doesn't generate much power, for that you need to split the shaft so the compressor can be stopped.
The issue with traditional turbos is that you need to add restriction to the turbine to deliver enough shaft power for response and low rpm boost. Adding an electric motor on the shaft lets you use electrical power to spin the compressor up when there's not enough exhaust going through the turbine.
To harvest energy efficiently, the turbine needs to be spinning pretty quickly to serve as an efficient impulse turbine, but having a compressor attached that also has to spin quickly is counterproductive. In F1 this isn't a problem since the engines run full throttle but on a street car running at part load, spinning the compressor is a waste of energy.
It's much more of a throttle response upgrade than anything else.
|
|
|
The Following User Says Thank You to serialk11r For This Useful Post:
|
|
07-02-2020, 05:34 PM
|
#10 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
|
Quote:
Originally Posted by serialk11r
This kind of setup likely doesn't generate much power, for that you need to split the shaft so the compressor can be stopped.
|
Stopping the compressor and decoupling it from the turbine doesn't seem to be any beneficial.
|
|
|
|