Information about the rear electric motor

ElSpa · 12-06-2016, 12:25 PM

I have a debate with a friend regarding the existence of the rear smaller electric motor on the i8

.
Any infos (pictures, movies

! ) would be great. And how does it work

skinrock · 12-06-2016, 03:47 PM

There isn't.

Jo-Sta07 · 12-06-2016, 03:51 PM

My understanding is there is a small (7 hp) electric motor in the rear that assists in start up as well as torque fill when needed. Could certainly be wrong.

ElSpa · 12-06-2016, 04:03 PM

Quote:

Originally Posted by Jo-Sta07

My understanding is there is a small (7 hp) electric motor in the rear that assists in start up as well as torque fill when needed. Could certainly be wrong.

That is what I heard

MartinDower · 12-06-2016, 04:04 PM

The engine has a multifunction high-voltage generator/motor that does a handful of jobs: torque infill, top-end power boost, starting and charging. See pg 11 on http://www.rotory.com/bmw/I8.pdf

JasH · 12-06-2016, 04:34 PM

Quote:

Originally Posted by skinrock

There isn't.

There certainly is

NGR · 12-07-2016, 03:20 AM

Quote:

Originally Posted by MartinDower

The engine has a multifunction high-voltage generator/motor that does a handful of jobs: torque infill, top-end power boost, starting and charging. See pg 11 on http://www.rotory.com/bmw/I8.pdf

Helps reduce turbo lag as well I believe. Potentially this 'little' motor is the most complicated thing (and probably the biggest innovation) in the the i8 due to the number of functions it performs!

Aye-eight · 12-07-2016, 01:56 PM

Quote:

Originally Posted by MartinDower

The engine has a multifunction high-voltage generator/motor that does a handful of jobs: torque infill, top-end power boost, starting and charging. See pg 11 on http://www.rotory.com/bmw/I8.pdf

Quite interesting that even the boost is delivered via belt drive. But then again, a number of motorcycles have been using a belt final drive quite successfully.

Jo-Sta07 · 12-07-2016, 02:13 PM

Quote:

Originally Posted by NGR

Quote:

Originally Posted by MartinDower

The engine has a multifunction high-voltage generator/motor that does a handful of jobs: torque infill, top-end power boost, starting and charging. See pg 11 on http://www.rotory.com/bmw/I8.pdf

Helps reduce turbo lag as well I believe. Potentially this 'little' motor is the most complicated thing (and probably the biggest innovation) in the the i8 due to the number of functions it performs!

Needs to be bigger, quite a lot of lag in higher gears.

Nivarox · 12-08-2016, 01:50 AM

Cool, I have learned something new on the i8
Thanks for those who ask and fills this thread up with useful replies

12-06-2016, 12:25 PM	#1
ElSpa Private First Class 41 Rep 115 Posts Drives: 2015 BMW i8 Pure Impulse Join Date: Nov 2016 Location: Bucharest iTrader: (0)	Information about the rear electric motor I have a debate with a friend regarding the existence of the rear smaller electric motor on the i8 . Any infos (pictures, movies ! ) would be great. And how does it work
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12-06-2016, 03:47 PM	#2
skinrock Agent Smith 270 Rep 3,344 Posts Drives: 2016 i8 Join Date: Jan 2011 Location: The Matrix iTrader: (9) Garage List 2016 BMW i8 [10.00]	There isn't. __________________ The i8 needs a V8 amirite?
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12-06-2016, 03:51 PM	#3
Jo-Sta07 Captain 474 Rep 687 Posts Drives: Ferrari 458, BMW i8, Acura NSX Join Date: Aug 2016 Location: Scottsdale/Pittsburgh iTrader: (0)	My understanding is there is a small (7 hp) electric motor in the rear that assists in start up as well as torque fill when needed. Could certainly be wrong.
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12-06-2016, 04:04 PM	#5
MartinDower New Member 2 Rep 9 Posts Drives: BMW i8 Join Date: Mar 2016 Location: Greater Yorkshire iTrader: (0)	The engine has a multifunction high-voltage generator/motor that does a handful of jobs: torque infill, top-end power boost, starting and charging. See pg 11 on http://www.rotory.com/bmw/I8.pdf
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12-08-2016, 01:50 AM	#10
Nivarox Quadrex 1093 Rep 1,424 Posts Drives: W212 Mercedes=Benz E Class Join Date: Jun 2016 Location: Close To German Car Dealer iTrader: (0)	Cool, I have learned something new on the i8 Thanks for those who ask and fills this thread up with useful replies __________________
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