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05-06-2014, 05:11 AM | #1 |
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Why does the dash pretend it's a hybrid?
I was driving a new 7 in eco pro yesterday and was so confused by the "charge" function in the dash. When applying the breaks, the car tells me it's charging as if it's a hybrid... but it's not.
Is it trying to tell me that it's using braking to recharge the battery? If so, does this actually have a substantial impact on fuel economy? I can't imagine the benefits are that extreme considering the battery doesn't power the motor.
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05-08-2014, 07:47 AM | #2 |
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It has nothing to do with hybrid technology.
Like the 730d and indeed all Efficient Dynamics models, it uses regenerative braking. This means that it delivers full power when accelerating and charges the car's battery only when braking or going downhill (when not accelerating). Apparently this can deliver 3% boost in energy efficiency, which can all add up! Luke
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05-08-2014, 09:34 AM | #3 | |
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05-14-2014, 04:55 PM | #4 | |
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Most of the time you are draining the battery to run electrical equipment like radios and fans and the alternator is freewheeling. Only when the battery is low is the battery replenished. As far as I can tell there is no regenerative braking like in a hybrid, it's just the cycling of the alternator. jeff Source: 03.3_F01 Energy Management.pdf |
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