[zhangyi17]

Anyone can explaine for me the algorithm behind auto start / stop on G05? Under which circumstances that it cuts off the engine and under which circumstances that it start it up again? I am only asking this because I have few instances where it just decided not to cut off the engine even I come to a full stop. And some other instances, it cut off the engine and later it decided to starts it up again without me releasing the brake...


Attached is a picture of the dash board where it decided not to cut off the engine even we are completely stationary. There's white Auto Start / Stop symbol with a line cross it

[TurtleBoy]

Depending on the air conditioning needs it won't shut off when you stop. Another reason it may not stop is if it detects the car in front of you moving, like at a stop sign. That is also a reason for the engine starting while you still are on the brakes, if the car in front of you moves up at a light the engine will normally start.

[sygazelle]

17.1 liters per 100 km. Impressive!

[BeeMdblU]

Originally Posted by sygazelle

17.1 liters per 100 km. Impressive!

you realize it's a 100km's not miles right

[Marty in NY]

Originally Posted by zhangyi17

Anyone can explaine for me the algorithm behind auto start / stop on G05? Under which circumstances that it cuts off the engine and under which circumstances that it start it up again? I am only asking this because I have few instances where it just decided not to cut off the engine even I come to a full stop. And some other instances, it cut off the engine and later it decided to starts it up again without me releasing the brake...


Attached is a picture of the dash board where it decided not to cut off the engine even we are completely stationary. There's white Auto Start / Stop symbol with a line cross it

Does this help?

Auto Start/Stop function

The Auto Start/Stop function helps save fuel. The system switches off the engine during a stop, for instance in traffic congestion or at traffic lights. Drive-ready state remains switched on. The engine starts automatically for driving off.

Functional limitations
The engine is not switched off automatically in the following situations:

In case of a steep downhill grade.
Brake not engaged strongly enough.
The external temperature is high and automatic climate control is running.
The car's interior has not yet been heated or cooled to the required level.
Where there is a risk of window condensation when the automatic climate control is switched on.
Engine or other parts not at operating temperature.
Engine cooling is required.
The wheels are at a sharp angle or the steering wheel is being turned.
Vehicle battery is heavily discharged.
At higher elevations.
The hood is unlocked.
HDC Hill Descent Control is activated.
The parking assistant is activated.
Stop-and-go traffic.
Selector lever position in N or R.
After driving in reverse.
Use of fuel with high ethanol content.


Safety mode
After the engine switches off automatically, it will not start again automatically if any one of the following conditions are met:

The driver's safety belt is unbuckled and the driver's door is open.
The hood was unlocked.
Some indicator lights light up for a varied length of time.

The engine can only be started via the Start/Stop button.

System limits
Even if driving off was not intended, the deactivated engine starts up automatically in the following situations:

Excessive warming of the car's interior when the air conditioning is switched on.
Excessive cooling of the car's interior when the heating is switched on.
Where there is a risk of window condensation when the automatic climate control is switched on.
When the steering wheel is turned.
Change from selector lever position D to N or R.
Change from selector lever position P to N, D, or R.
Vehicle battery is heavily discharged.
Start of an oil level measurement.

Intelligent Auto Start/Stop function
Depending on the vehicle equipment and country-specific version, the vehicle features a variety of sensors for assessing the traffic situation. The Intelligent Auto Start/Stop function uses this information to adapt to various traffic situations in a proactive manner.

For instance, this applies to the following situations:

When a situation is detected in which the stopping time is expected to be very short, the engine is not switched off automatically. A message appears on the Control Display, depending on the situation.
When a situation is detected in which the vehicle needs to drive off immediately, the engine is started automatically.
The function may be restricted if the navigation data is invalid, outdated or not available, for example.

[zhangyi17]

Originally Posted by Marty in NY

Does this help?

[SIZE="4"][COLOR="RoyalBlue"]Auto Start/Stop function[/COLOR][/SIZE]

The Auto Start/Stop function helps save fuel. The system switches off the engine during a stop, for instance in traffic congestion or at traffic lights. Drive-ready state remains switched on. The engine starts automatically for driving off.

Functional limitations
The engine is not switched off automatically in the following situations:

In case of a steep downhill grade.
Brake not engaged strongly enough.
The external temperature is high and automatic climate control is running.
The car's interior has not yet been heated or cooled to the required level.
Where there is a risk of window condensation when the automatic climate control is switched on.
Engine or other parts not at operating temperature.
Engine cooling is required.
The wheels are at a sharp angle or the steering wheel is being turned.
Vehicle battery is heavily discharged.
At higher elevations.
The hood is unlocked.
HDC Hill Descent Control is activated.
The parking assistant is activated.
Stop-and-go traffic.
Selector lever position in N or R.
After driving in reverse.
Use of fuel with high ethanol content.


Safety mode
After the engine switches off automatically, it will not start again automatically if any one of the following conditions are met:

The driver's safety belt is unbuckled and the driver's door is open.
The hood was unlocked.
Some indicator lights light up for a varied length of time.

The engine can only be started via the Start/Stop button.

System limits
Even if driving off was not intended, the deactivated engine starts up automatically in the following situations:

Excessive warming of the car's interior when the air conditioning is switched on.
Excessive cooling of the car's interior when the heating is switched on.
Where there is a risk of window condensation when the automatic climate control is switched on.
When the steering wheel is turned.
Change from selector lever position D to N or R.
Change from selector lever position P to N, D, or R.
Vehicle battery is heavily discharged.
Start of an oil level measurement.

Intelligent Auto Start/Stop function
Depending on the vehicle equipment and country-specific version, the vehicle features a variety of sensors for assessing the traffic situation. The Intelligent Auto Start/Stop function uses this information to adapt to various traffic situations in a proactive manner.

For instance, this applies to the following situations:

When a situation is detected in which the stopping time is expected to be very short, the engine is not switched off automatically. A message appears on the Control Display, depending on the situation.
When a situation is detected in which the vehicle needs to drive off immediately, the engine is started automatically.
The function may be restricted if the navigation data is invalid, outdated or not available, for example.

This is really complicated..... I decide to trust BMW has its algorithm works out and bug fixed. So I give up trying to understand why it did or did not shutdown the engine at a complete stop...

[zhangyi17]

Originally Posted by sygazelle

17.1 liters per 100 km. Impressive!

I was very very gentle with my right foot

[sygazelle]

Originally Posted by BeeMdblU

you realize it's a 100km's not miles right

Yes. l/100km is a standard consumption formula. 17.1 liters per 100 km equals 13.7 Miles per Gallon. The M50i is a thirsty beast when the right foot goes down. Like I say, impressive!

[sygazelle]

Originally Posted by zhangyi17

I was very very gentle with my right foot

Of course you were.

[zhangyi17]

Originally Posted by sygazelle

Yes. l/100km is a standard consumption formula. 17.1 liters per 100 km equals 13.7 Miles per Gallon. The M50i is a thirsty beast when the right foot goes down. Like I say, impressive!

I remember in Amazon Grand Tour, Richard told Jeremy that James has a 85hp car, but a 5hp foot. This is how I drive when my baby is in break in period...Can't wait the day when I can open her up and release the beast underneath the hood.

[Caramel]

zhangyi17 You will be surprised how nice your dashboard will look after you peel off the plastic film that BMW had put there to protect it during shipping.

[Caramel]

Originally Posted by zhangyi17

This is really complicated..... I decide to trust BMW has its algorithm works out and bug fixed. So I give up trying to understand why it did or did not shutdown the engine at a complete stop...

In the end, it boils down to two categories of events in which the auto stop does not turn off the engine:

- You indicate that you don't want to turn off the engine by only lightly touching the brake pedal.
- The car needs more power from the engine than what it would get from the battery if the engine was turned off.

[zhangyi17]

Originally Posted by Caramel

zhangyi17 You will be surprised how nice your dashboard will look after you peel off the plastic film that BMW had put there to protect it during shipping.

I am sure... I will peel it off soon. Psychologically, I need to prepare myself

[VTENGR]

Originally Posted by zhangyi17

This is really complicated..... I decide to trust BMW has its algorithm works out and bug fixed. So I give up trying to understand why it did or did not shutdown the engine at a complete stop...

It basically boils down to this:
ASS will not activate if...
1) you're in sport mode
2) it's so hot outside that the A/C cannot keep up w/o the engine running
3) you're in stop and go traffic, so it knows you will be starting back up immediately.

[BeeMdblU]

Originally Posted by sygazelle

Yes. l/100km is a standard consumption formula. 17.1 liters per 100 km equals 13.7 Miles per Gallon. The M50i is a thirsty beast when the right foot goes down. Like I say, impressive!

I'm averaging 15.6 l in an X6M, I must be right footless even though in sports plus all the time

[X5 45e]

Originally Posted by BeeMdblU

I'm averaging 15.6 l in an X6M, I must be right footless even though in sports plus all the time

Or maybe the BC is set on trip / last refueling and he only drove a few miles?

If this is the average consumption from factory for thousand miles it is quite high indeed.

[mitch57]

On my X7 40i I average between 20 and 22 mpg combined. Freeway driving at 60 -70 mph I average around 26 mpg. Freeway driving at 80 mph I average between 24 and 25 mph.

I consider this pretty impressive for such a big vehicle.

[scotchy]

Originally Posted by X5 45e

Or maybe the BC is set on trip / last refueling and he only drove a few miles?

If this is the average consumption from factory for thousand miles it is quite high indeed.

Originally Posted by X5 45e

Or maybe the BC is set on trip / last refueling and he only drove a few miles?

If this is the average consumption from factory for thousand miles it is quite high indeed.

I think that's pretty normal. I don't ever drive in comfort and average around 18-19 liters per 100km.

[X5 45e]

Originally Posted by scotchy

I think that's pretty normal. I don't ever drive in comfort and average around 18-19 liters per 100km.

That is quite lot. Almost double of the 45e without charging the battery. But I presume you didn't by a V8 for its fuel economy 😜.

I love the sound of the V8 engine but it is too expensive to put a car like that on a company in Europe. Taxes are ridiculously high. In Norway and The Netherlands taxes are more than the price of the car. In Belgium the tax difference between a 50i and 45e is 10-15k a year.

I hope fuel prices are at US level in Canada and not a European level.

[BeeMdblU]

Originally Posted by X5 45e

That is quite lot. Almost double of the 45e without charging the battery. But I presume you didn't by a V8 for its fuel economy 😜.

I love the sound of the V8 engine but it is too expensive to put a car like that on a company in Europe. Taxes are ridiculously high. In Norway and The Netherlands taxes are more than the price of the car. In Belgium the tax difference between a 50i and 45e is 10-15k a year.

I hope fuel prices are at US level in Canada and not a European level.

we're in between, not as good as the states and they have better octane rating