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Old May 7th, 2018, 17:23   #7
Phd of TDIClub Enthusiast
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Join Date: May 1999
Location: Canada

I'm all for a BAS system, although I question the utility of so much work being expended just to turn a non-firing engine in the 48V systems that have an e-drive mode (this TDI mild hybrid will not so I digress, but the 48V one used in the V6 TDI apparently will). More elegant would be to have the e-motor/generator in the bellhousing replacing/augmenting the clutch or torque converter.

I thought of doing a poor-man's regenerative retarder using a high-amp 12V alternator that is common in competition sound system circles. I'd add a bank of 18-20V li-ion batteries but nominally maintaining a ~60% SoC and standard 14.4V voltage. When I'm coasting or press a steering wheel button, the alternator would kick into full 18V and full amperage (300A is not uncommon), giving me 5.4 kW of retarding power that charges up the batteries. I can then descend down pretty decent grades without touching the brakes and recuperating the electrical energy as a bonus.

TDIMeister's German-imported 1998 Audi A4 Avant TDI quattro

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Last edited by TDIMeister; May 7th, 2018 at 17:27.
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