AUTO STOP/START QUOTE

[rocks]

Battery not low. I keep it on a maintainer when not being driven.

Interesting. I've read here a non working start/stop is a sign of a weak battery. Lucky you.

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[Mark S.]

Battery not low. I keep it on a maintainer when not being driven.

You're in WI. Wait until it gets a bit warmer this spring. The following list details the conditions that must exist for Auto start/stop to function. There are several there related to temperature.

• You do not press the Auto-Start-Stop button.
• Your vehicle exceeds an initial speed of 3 mph (5 km/h) after the vehicle initially starts.
• Your vehicle is stopped.
• Your foot is on the brake pedal.
• The transmission is in drive (D).
• The driver door is closed.
• There is adequate brake vacuum.
• The interior compartment has cooled or warmed to an acceptable level.
• The front windshield defroster is off.
• The steering wheel is not being turned.
• The vehicle is not on a steep road slope.
• The battery is within optimal operating conditions, such as battery state of charge and temperature in range.
• The engine coolant is at operating temperature.
• Your vehicle is not being driven at a high altitude.
• The ambient temperature is moderate.

 

[Mark S.]

More of a concern for me is the battery and oil dropping down in the pan at a long stoplight or something. However, I always used the button to turn the auto stop off.
Odd but my wife's '23 HR-V EX-L doesn't have that feature. Probably the only honda model.

I don't think oil draining will be an issue. The system generally won't keep the engine off for more than a minute or so. And since the car must be at operating temp for the system to engage, the oil will already be hot. The short off duration means oil will not have time to run off internal parts enough to affect lubricity. Further, hot oil will distribute around the engine fast enough that increased wear due to lack of oil will be insignificant.

I would be very surprised if this wasn't one of the issues studied carefully during testing of the auto start/stop system.

 

[Jube]

I purchased OB new about this time last year. Stop/start worked up until this AM.

 

[Mark S.]

I purchased OB new about this time last year. Stop/start worked up until this AM.

You mean this morning?

 

[Jube]

Yes. This morning.

 

[Bucko]

Can you please provide a link showing the reliability and durability testing of the starter used in the Bronco Sport when the auto start/stop is routinely used?

I cannot, and did not say there was one (" reliability and durability testing of the starter used in the Bronco Sport when the auto start/stop is routinely used "). However, the starter used for the BS and other Ford and vehicles with the start/stop feature are built to handle the start/stop requirements.

I won't loose sleep over it. But lets wait and see if anyone can inform us that their starter itself failed because it was overworked by the start/stop feature.

 

[Mark S.]

Yes. This morning.

I'll submit then that you don't have enough data to say the system is no longer working. Look over the list of parameters I posted previously; my guess is one or more of them were not present this morning when you system wasn't operating. Do you see a capital A in a circle with a line through it at the bottom of your instrument cluster?

 

[Dude]

I cannot, and did not say there was one (" reliability and durability testing of the starter used in the Bronco Sport when the auto start/stop is routinely used "). However, the starter used for the BS and other Ford and vehicles with the start/stop feature are built to handle the start/stop requirements.

Right, just wanted to see your technical data (like a report or technical study) to back up your claims for the Bronco Sport.

 

[BravoAlpha]

As stated above, the starters and alternators are more robust.

These new starters dont work like a conventional starter we‘re used to. When the engine stops rotating, the starter drive is reengaged with the flexplate teeth in position for the next restart. That means only the motor drive needs to be energized for the starter to rotate. The Bronco Sports ECM constantly monitors engine rpm and will drive the starter to match the engine rpm making the drive engagement smooth.

I’m not concerned with the starter or battery wear.

WHAT I DON’T like
1- and may not fully understand, is the transmission engagement. There’s solenoids and pumps ..maybe an accumulator keeping the clutches engaged? A few times at stop sign or parking there‘s a shutter that I think is coming from the transmission and it’s awful. My Silverado does it too. I hate it. I just drove my mom’s Subaru ..,it did it too.

ALSO…
2- as Ive mentioned before in other threads. Battery failures and anomalies show up in many ways. They are fine one minute and not the next. Some are bad OFF THE SHELF, some go for 7+ years, some slowly and predictably deteriorate. The factors that go in to a battery’s protection, health and longevity are endless. I’m not going to risk my life or family’s safety by allowing this thing to stop the engine in the middle of the road in the middle of a major intersection and not restart. I know, I know…the battery management system won‘t let that happen. But, it has happened. Many times. Many brands. There’s testimonies on this forum in-fact. So it shuts down in the pickup lane at school or in a drive thru…grooovy. But I’m disabling that SOB elsewhere.

Allthat said. My concerns lie in other areas. The Auto start/stop is the worst invention in the automotive world in recent history…change my mind!

 

[RWT]

Battery not low. I keep it on a maintainer when not being driven.

Your battery may not be low but your computer(s) may think it is and turn off the ASS. Ford has just announced, as seen here on the forum, that all BS computers will have to be reprogrammed because they don't properly detect the actual battery status.

I think many assume that means the computer(s) will not properly detect when the battery is low only. This would be an easy assumption because it was low battery issues that created the unsafe conditions, i.e., no restart after ASS shutdown and possible stalling at low rpm, that prompted the recall. However, there's nothing to say that the same issue, of not being able to properly detect the battery status, couldn't result in the computer thinking the battery is low when in fact it is not.

If your computer(s) erroneously thinks the battery is low it will disable ASS.

JMHO
No expertise implied or expressed

 

[TeamTaylorBronco]

This subject has been beat to death. The reality is the Auto Start/Stop technology requires a uniquely made starter and many people wonder if a start/stop system will wear out a starter. The easy answer is, “No.” Starters in vehicles equipped with this new tech are made differently. These starters are optimized to turn the motor more slowly, which increases its longevity.

(1) The gear ratio from the starter-drive pinion to the flywheel ring gear is optimized to make the starter's motor turn more slowly. This can be done without materially changing the design of the transmission or flywheel at all on existing designs.

Crucially, this reduces starter-motor speed (in RPM), since 90 percent of starter-motor brush wear occurs not during cranking, but during the coast-down after the start has finished. If a higher-torque motor can spin more slowly, its coast-down time is shorter, increasing its longevity.

(2) The composition of the carbon and copper brushes on a start-stop motor differs from its traditional counterparts to increase longevity without accelerating the wear on the commutator.

(3) Rather than rely on oil-impregnated bushings for the rotating assemblies, start-stop starters mostly use needle bearings.

(4) The solenoid on start-stop starters decouples the mechanical action of engaging the drive pinion into the flywheel from the electrical action of stopping and starting the motor.

This allows for a dedicated design to turn power on and off to the motor, optimizing contact design and wear, against contacts that have to be integrated as part of a spring-loaded plunger.

This also reduces the electrical load requires to turn the engine, so that there is enough current available for accessories/lighting to operate during the start event.

(5) Finally, start-stop motors are integrated with other technologies that identify when each cylinder of the engine will reach top-dead center.

That lets the fuel injectors pulse and fire during the middle of a complete rotation of the crank, against having to wait for a complete revolution that lets the first cylinder reach that position to start the fuel-spark timing sequence.

And there you have it: the full technical explanation of why you don't need to worry about starter motors wearing out prematurely due to start-stop systems.

Thank you for this in-depth explanation! I really appreciate it. I just purchased a 2024 BB BS and just turned 2500 miles on it. I had a 2020 Edge (with Auto Stop/Start) and had to replace the starter at about 23,000 miles. I've been wondering if i should disengage the AutoStop/Start on my BS to save the starter. Now I feel like i have a better understanding of how it works so I will continue using the Auto Stop/Start. I actually believe it helps save gas mileage on my daily commute! Thanks again, my friend!

 

[BLUEOVALRACER]

I didn't even know it was a thing when I bought the car. Wigged me out for the first couple of weeks. Now, like you say, I don't even notice it.

However, I am concerned about the PCM programming for alternator recharge, for it to work seamlessly, even when the battery is a bit older.

It still wigs me out when i forget to shut it off it's just a weird feeling when you look at the tachometer and it's at 0 then let off the brake and it starts back up.I just don't care for it and the 21 F-150 i had it was deleted maybe from the chip shortage not sure but i didn't miss it on the F-150. I wouldn't miss it on the Bronco Sport either but at least i can shut it off if i want.

 

[BLUEOVALRACER]

Amen! Problem is you can't mandate safety...today's idiots still screw up regardless of the bells and whistles....therefore freedom of choice should not be taken away. Best example is most every vehicle has bluetooth for cellphones and I continually see driver after driver using one hand to drive and one hand on the phone...the cops have simply given up on enforcement and this is the obvious infractions we can see...heck folks here invest in dummie dolls to place on their passenger seats just to drive in the HOV lanes and get away with it!

X2 on the Cops they probably have their hands on their phones while on duty.

 

[Forestpatrol]

It’s not even the starter that I worry about, it’s the wear and tear on every other component. This is a system that would have been laughed out of the board room if it weren’t for the never ending insatiable quest to meet more and more ridiculous fleet mileage requirements.

The fact that it’s an option to turn it OFF and not to turn it on tells you everything you need to know. Soon it won’t even be your choice. Sort of like how you have to be a licensed repair facility to purchase the special tool to adjust a small engine carburetor.

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