Quote:
Originally Posted by andrewwynn
On my recent 850 mile drive I was curious about the alternator charging program so I pulled up voltage display on bimmerlink.
Going through the mountains I noticed the voltage drop to ≈ 12.3 going up hills and 14.8 when going down hills.
I think the IBS aims to keep the battery at about 80% charge so it always has room to take charge while coasting. I do wonder how often it charges when driving over a completely level road.
https://bimmerscan.com/bmw-intellige...ry-sensor-ibs/ |
Well, that sort of makes sense. Let it float going uphill when the most power (fuel) is required and top it off going downhill when you're coasting. The whole point is to economize after all and "optimize" battery state. It's like regenerative braking.
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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
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