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06-11-2015, 11:13 AM | #1 |
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Eco Pro Mode?
Whenever I'm on the highway with my kids in the car. I usually put the car in ECOpro mode. I have no idea what is does to make me get 4.8+mpg but thats not my question. On the cluster it tells me to take my foot off the gas, slow down MPH and "CHARGE POWER" What is charge power? It only goes to that side when i hit the brake. From my understanding thats how hybrids work. When you hit the brake it charges the battery? But i have a 535i xDrive. I dont have a hybrid lol.
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06-11-2015, 11:52 AM | #2 |
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When you are coasting or braking, the alternator engages to charge the battery, otherwise, the alternator is disengage, unless the battery is below 80%. The eco mode will retard your throttle map, de-intensify your HVAC and put the transmission in netural when you let off the gas.
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06-11-2015, 11:55 AM | #3 |
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ECO Pro smooth out your gas input. For example, you push it in half way it won't instantly give you the throttle respond but gradually get you there the best way it can burning the least amount of fuel. Basically, it creates massive throttle lag. Using Eco Pro in the city is like driving a gutless econobox. The +4.8mpg it display is the difference between the altered throttle input vs normal.
Charge power is the regnerative braking. When you coast or step on the brakes slowly, it uses the alternator to slow the car down and charge the battery. If you slam on the brakes, it uses the brakes. |
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06-11-2015, 11:57 AM | #4 | |
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06-11-2015, 12:00 PM | #5 | |
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I try to downshift to brake most of the time because it charges my battery faster that way. |
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06-11-2015, 12:02 PM | #6 | ||
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06-11-2015, 12:27 PM | #7 |
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If your brakes do not stop the car linearly, it might be due to the BMW ZF transmission that likes to downshift when coasting. The BMW regenerative braking system is nothing more than a marketing scheme, it does not use the alternator to slow down the car in place of the brakes. Think about it, how can it? We are talking about a small automotive alternator here, not a massive drive motor/generator that is found on a hybrid vehicle. The BMW regenerative system simply disengage the alternator during accelaration to gain a few HP and efficiency.
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06-11-2015, 12:33 PM | #8 | |
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06-11-2015, 12:39 PM | #9 |
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It's not a big alternator like in an EV but its braking power is definitely noticeable and bigger than a regular alternator. And I do know when the car downshift. The car only uses downshifts aggressively when in sport mode, not normal/comfort/eco
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06-11-2015, 12:46 PM | #10 | |
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Last edited by The X Men; 06-11-2015 at 01:00 PM.. |
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06-13-2015, 08:28 AM | #11 |
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Putting the car in "neutral" is if you have coasting enabled on newer cars. Otherwise it engages the regenerative braking after lifting off of the gas. It does this in ALL driving modes (including Sport+). Pressing on the brake pedal is also no different in Eco Pro or sport. Eco pro is only changing throttle response, transmission shifting, and HVAC. That being said, Eco pro is much more valuable in city driving (to MPG) due to the reduced input of the throttle and transmission. This also pairs with recharging the battery for Automatic start stop which is the main reason for the regenerative braking.That also means you have to drive like a "granny" to get the full benefits of this. The only advantage you would get on the highway is the climate control piece and the warnings telling you to slow down.
That being said, I have my car coded to always start in Eco Pro as on average I get +4 mpg in my normal commute by using it. If you like the sportiness or responsiveness of comfort or sport then use it. The other option is to pull the shifter over to sport mode while in Eco pro if you need more responsiveness to get into a hole in traffic. Occasionally I'll drive in Sport or Sport+ if I want the car to be more responsive but in my normal commute it's not worth the mpg penalty just to ride someone's bumper in traffic.
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06-13-2015, 09:07 AM | #12 | |
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For example, in older cars, you get 12 volts when alternator off and 13.8 volts with the alternator running So, when your car's switching from brake regeneration to normal, is the bus voltage fluctuating? |
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06-13-2015, 10:28 AM | #13 |
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I am not sure, I have never measure the voltage when the car is accelerating, but I would imagine the voltage would have to be lower than the alternator disengage.
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06-13-2015, 12:17 PM | #14 | ||
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06-14-2015, 05:34 AM | #15 | |||
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07-15-2015, 12:38 PM | #16 | |
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07-15-2015, 12:54 PM | #17 |
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07-19-2015, 12:19 PM | #18 |
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I've played around with the EcoPro mode and hate it. As noted above, it creates horrible throttle lag and all you gain is a measly 3-4 miles of extra range from your gas tank. It doesn't even significantly increase your MPG--zero out your MPG readout and use EcoPro for a full tank, then do the same in Comfort, compare the results, and you'll see there isn't much difference. I have a short commute with moderate traffic, so it's even less useful for me, as it doesn't even extend the range for more than 1 or 2 miles. When you add in the nasty heat and humidity in my area, it makes even less sense for me to use it--I don't want to melt in my car just to (theoretically) save a bit of gas.
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07-19-2015, 05:03 PM | #19 | |
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07-20-2015, 11:02 AM | #20 | |
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