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48v "mild hybrid" system for Audi cars.

7.3K views 18 replies 7 participants last post by  Karter2  
#1 ·
Audi have stated that several of their new models may use a new 48 v Lithium battery powered "mild hybrid" system based on a belt drive alternator/starter motor .
The mild hybrid setup includes a belt-driven alternator/starter, and a 48V lithium-ion battery that’s recharged via regenerative braking. The system will be standard on both Audi A8 diesel and petrol models.

Audi says the system can provide up to 12kW of power and 60Nm of torque. It’s claimed, under the NEDC testing scheme, fuel economy can be improved by up to 0.7 litres per 100 kilometres.
 
#2 ·
well starting the engine quickly has some benefits, and this sounds like a fairly simple fitting. But it doesn't really meet the sort of engineering results you would expect from a German manufacturer. Kind of odd to considering how merkel was all about the paris deal and how committed they are to renewables.

Hell coyotex made a plug in hybrid out of a metro using a 5th gear extension like years ago. I'm a little shocked at how underwhelming this is.
 
#5 ·
#10 ·
For the most part though it's not to different for the power source to charge everyone's EV vehicles.

At this point in time, dirty fossil fuels are still the main source of power generation across the world.
Yes some pockets are renewable sources, unfortunately we are surrounded by petrochemical products in every aspect of life. Not just fuel sources. No doubt time will change and we will get better with plant based products, and recycling. However I can't see it being in my lifetime at least. (Roughly another 50years)
 
#11 · (Edited)
Renault have anounced they will be equiping several of their new vehicles with a similar belt drive, 48v, Altermotor based , "mild hybrid" system .
Very similar to the Audi system but 10 kW and supplied by Continental out of Germany. (Same supplier as Audi ..i wonder ?)
Continental are saying they are working on a more "integrated" motor system.
A motor in the transaxle like a Prius possibly.
http://www.caradvice.com.au/564190/worlds-first-48-volt-mild-hybrid-system-in-production/
 
#13 ·
...
Continental are saying they are working on a more "integrated" motor system.
A motor in the transaxle like a Prius possibly.
http://www.caradvice.com.au/564190/worlds-first-48-volt-mild-hybrid-system-in-production/
A mild hybrid motor-generator in the transaxle could make sense, but the Hybrid Synergy Drive of a Prius is a huge leap from that - there is no "mild" version of HSD because MG1 must handle enough power to control the engine speed, via the power splitter gearset... and MG2 needs to be able to absorb or supply the same power and more.

Honda's old Integrated Motor Assist is a more suitable format for integration in the transaxle. Various manufacturers have offered motor-generators which sandwich between engine and transmission, as an option for their transmission products; ZF (and presumably others) offer the motor-generator mounted in the bellhousing along with the torque converter or clutch (e.g. 15 kw with ZF 8HP automatic).
 
#17 · (Edited)
Yet more "48v , mild hybrid". systems .
This time to be used by VW in 2018 on the Golf, and Volvo also as part of their full range conversion to EV/hybrid vehicles in the coming years, (2019?)
I wonder how much of this is just "Media news fodder" to keep the critics at bay and buy time until these Auto companies figure out a better way to convert their existing ICE architecture vehicles to real EV/ hybrids. ?
https://www.forbes.com/sites/michae...at-youve-read-on-volvos-electric-car-strategy-is-badly-misleading/#6d23062ed95a
 
#18 ·
The article is somewhat reasonable, but I can't give much credibility to an author who writes this:
Honda replaced the torque converter on the 1999 Insight with an electric motor...
No. There's no torque converter to replace in a manual transmission, and the IMA doesn't even replace the clutch, which is still needed. The IMA is an addition, not a replacement for anything. While this author says he has written about the industry for many years, I don't think that he has a clue about the technology that he is writing about, and probably wouldn't recognize a torque converter, clutch, or motor-generator if it were dropped in his lap. :rolleyes:
 
#19 ·
They are primarily journalists at the end of the day.
Even some of the most prominent/successful lifetime motoring journo's are actually pretty poorly informed (dumb) when it comes to technical knowledge.
(EG....the TopGear crew !)
I have even seen some rediculous statements from car manufactures own printed information sheets.