Go Back   EcoModder Forum > Off-Topic > The Lounge
Register Now
 Register Now

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 04-20-2013, 11:51 PM   #1 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,162 Times in 1,465 Posts
Fast-charging capacitor in 2014 Mazda 6

Sounds pretty cool:

"The 6 is the first car in America to capture energy in a fast-charging capacitor with no rare-earth metals, rather than a slower, bulkier and harder-to-recycle battery. Lift off the gas, and the optional i-Eloop system spins the alternator to charge the capacitor in eight seconds flat. The stored juice — roughly 2,000 watts — then powers the electric system and accessories. E.V. and laptop users, take note: unlike lithium-ion batteries, Mazda’s capacitor is designed to charge and discharge millions of times with no loss of storage capacity."

How much power is this and how long might it power the electrical system and accessories?


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.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

Old 04-21-2013, 08:57 AM   #2 (permalink)
Gen II Prianista
Rokeby's Avatar
Join Date: Jul 2009
Location: Ballamer, Merlin
Posts: 453
Thanks: 201
Thanked 145 Times in 89 Posts
There's a very complete description of Mazda's i-ELOOP
regenerative braking system here:


It is supposed to give a 10% MPG increase.
It sounds like it could be a feature on all future Mazda offerings.
  Reply With Quote
Old 04-21-2013, 03:22 PM   #3 (permalink)
Master EcoModder
Ryland's Avatar
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,903

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 433 Times in 353 Posts
Originally Posted by California98Civic View Post
How much power is this and how long might it power the electrical system and accessories?
2000 watt hours is a huge amount of energy! stock starting battery in a Honda Civic is 480 watt hours, the lithium battery pack for my electric motorcycle is 4,800 watt hours, so I suspect that someone didn't get their facts straight.
I suspect that either the alternator is putting out 2000 watts for that few seconds at the 25v that they say the alternator works at it's putting out around 80 amps, but for only 8 seconds that would be 4.5 watt hours, about the energy stored in a pair of AA batteries.
  Reply With Quote
Old 04-21-2013, 03:51 PM   #4 (permalink)
Master EcoModder
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,023 Times in 1,304 Posts
Maybe 2000 watt seconds, 1/3600 of 2000 watt hours.

  Reply With Quote
Old 04-23-2013, 02:13 PM   #5 (permalink)
Master EcoModder
Join Date: Nov 2008
Location: Madison AL
Posts: 1,123

The Geo - '93 Geo Metro
Team Metro
90 day: 45.16 mpg (US)
Thanks: 30
Thanked 40 Times in 37 Posts
Mazda introduces supercapacitor-type regenerative braking

This link has better information.
  Reply With Quote
The Following User Says Thank You to MadisonMPG For This Useful Post:
SoobieOut (04-23-2013)
Old 04-23-2013, 03:42 PM   #6 (permalink)
Polymorphic Modder
SoobieOut's Avatar
Join Date: Aug 2010
Location: Utah
Posts: 307

2006 DaCivic Hybrid - '06 Honda Civic Hybrid
90 day: 45.16 mpg (US)
Thanks: 188
Thanked 40 Times in 25 Posts
I like the idea of stopping the engine at the best starting position then using the spark to help with the engine cranking torque.
  Reply With Quote
Old 04-23-2013, 04:14 PM   #7 (permalink)
Master EcoModder
Join Date: May 2012
Location: USA
Posts: 2,643
Thanks: 1,502
Thanked 276 Times in 226 Posts
I bet adding a solar panel to the cap will result in some amazing gains.
  Reply With Quote
Old 04-23-2013, 05:36 PM   #8 (permalink)
In the fasting lane
RedDevil's Avatar
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,988

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 50.29 mpg (US)
Thanks: 1,705
Thanked 2,229 Times in 1,444 Posts
If I read correctly, it is only used to power the electric systems during idle stop. So those don't drain the battery, so that can be kept small.
I fear the system will cost a hell of a lot more though than that heavier battery.

It is no use for a hybrid because they already have that heavier battery to store brake energy to not only power the equipment during idle stop, but also to help accelerate when the stop ends.

Supercapacitors have a very limited capacity compared to batteries.
In the article Mazda claims the capacitor can store 25,000 Joules. The Insight might use up that capacity in 2 or 3 seconds during acceleration.
For effective hybrid use it needs to have at least 5 times the capacity, which I fear will make it too heavy to be practical.

I'd love the properties of a supercapacitor big enough for hybrid use, except the weight.
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.

Investors woes:
"In hindsight, I should have placed a bet on the horse that won the race"
"In hindsight, I should have bet more on that horse"

Last edited by RedDevil; 04-23-2013 at 05:42 PM..
  Reply With Quote
Old 04-25-2013, 01:27 AM   #9 (permalink)
Master EcoModder
Join Date: May 2012
Location: USA
Posts: 2,643
Thanks: 1,502
Thanked 276 Times in 226 Posts
Nothing like shorting a fully charged multi farad cap.
  Reply With Quote
Old 07-03-2013, 05:09 PM   #10 (permalink)
night9's Avatar
Join Date: Jul 2012
Location: Austin, TX
Posts: 101

Sliver - '12 Hyundai Elantra limited
Team Hyundai
90 day: 35.1 mpg (US)

t-ruck - '06 chevy Colorado Lt
90 day: 21.88 mpg (US)

Bob - '09 Harley Sportster Nightster
90 day: 38.88 mpg (US)

Pearl - '14 Toyota Prius C 3
90 day: 48.1 mpg (US)
Thanks: 18
Thanked 13 Times in 12 Posts
EPA rated the I-loop equipped mazda 6, 28mpg city 32 combined, 40 highway.
Not to bad of an increase. The 6 without only managed 26 city, 30 combined, 38 highway. 2 mpg across the board. I can't wait to see the diesel's numbers with the I-loop sytem. 48-50mpg highway??? I would imagine its going to best both the cruze diesel and the VW TDI's on the EPA cycle. I just hope it comes with a six speed manual transmission option.

  Reply With Quote
Reply  Post New Thread

Thread Tools

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com