OMG, look at all the extra systems that can fail. That is a ton of extra complexity. WTF. Plus, all the starting and stopping the engine, and the fire hazard from the lithium battery. I am going to look for one without a mild hybrid. Thanks for the video.
Holy crap! I had a 48v hybrid X5, I didn't expect the complexity of this 48v hybrid system in such a degree that even coolant was introduced to the starter which can be a trouble spot in the future...
@@NoBrainerTalk Yes, last time I doscovered a very interesting actuator on the cylinder head near exhaust cam consisting of two pushrods that act on rocker arm pin via som sort of pushbar.
I know there is no official info yet, but there is a rumor that a gasoline powered variant of the next gen M3 (G84) will have a 48v mild hybrid. How would it be used in that car?
I would expect S58 with mild hybrid to be similar to the B58TU2, as in there will be no alternator or starter-generator on the engine ancillaries and the 48V mild hybrid system will work with the gearbox. Oh my goodness it is almost 2025, and I still have not made Part 2 of the B58TU2 video where I was going to cover the 48V mild hybrid system... More details will come in a future video...
The interesting thing is, in some certain market like Malaysia, Australia etc, never have the 48v mid-hybrid system, even the LCI and LCI II m340i and the m440i. My question is, for the non 48v mid-hybrid cars currently selling in these countries, will the engine models be updated to TU1 or TU2 versions like US and EU. Or is it that cars in these markets have been using the original B58 engine from the very beginning? Because they simply don't need a system adapted to 48V, it doesn't matter how many times LCI. Thx~
m340i and the m440i have the B58TU1, but you can have it with and without the 48V mild hybrid system. It's interesting that some markets won't offer it, this is likely to keep complexity and price down in markets where the regulations allow it. The B58TU2 is a different setup of mild hybrid but it cannot be offered as a non mild hybrid I think, so all markets with TU2 will get it.
@@NoBrainerTalk Thx for your reply. The B58TU2 appears to be a version specifically improved for the 48V platform, and the 48V platform will be a necessary step for BMW's future models. Unfortunately, the LCI II M340i I ordered will still feature the B58TU1. Looking forward to more of your content-Great!
Thanks your video is great. I have two more questions: 1. Is the beefier 48V starter generator brushed or brushless? (My car sounds still brushed) 2. Is the drive belt anywhere different in the 48V models to handle that 11hp/120ft lb force? That sounds too much for a belt..
Thank you for your compliment and questions: 1. Wow, what a technical question, and to be honest I don't know. It would make sense for the starter generator to be brushless to give it a longer life, emit less noise, have higher efficiency etc. But you are saying it sounds brushed which might mean BMW went for lower cost option? 2. I believe you are correct that it is alot of force for the belt, and it's likely why the first start of the day is with the conventional 12V starter. The starter generator either keeps the crank in motion when coasting, or starts the engine when everything is already warm and lubricated with oil (i.e. least resistance), so that the 48V system is under the lowest possible mechanical strain. The belt is a different P/N and as you say must be a more robust design due to the aforementioned strain it is subjected to when starting the engine.
Hi, as I understand it, this system only assists the engine in the lower power bands and does not add more peak power. So the peak torque and hp remain unaffected. A dyno run of B58TU1 with and without mild hybrid system should however show different curves I believe.
@@NoBrainerTalk i feel like if i push the car from say 2000rpm in 2nd gear all the way up to redline that the eboost holds until it switches gear, third gear loses the eboost completely. It's a weird system. Thanks for your reply!
Longevity of the stock engine block and internals may be extended by the mild hybrid system to some degree and under some driving environments. There are many variables I would say. If your engine model is sold with and without the system, as is the case with the B58B30B which comes with and without it, to retrofit the system should be relatively straight forward, it will require replacement of all the components that are different. It will likely be costly, and time consuming and need alot of programming to work.
@@AW-gj4ji Longevity and reliability are very different. Reliability is more of a system characteristic. Longevity is more a component characteristic. I would not say that the 48V mild hybrid system makes the engine more reliable.
What about PRE-TU mild hybrids? I don't see purple cables or 48v batts on those, yet they have the regen indication on the dashboard which you can also feel engaged as you coast or brake. Is there a video pre-TU?
Hi, there's no 48V mild hybrid system on pre-TU B58s. The regen indication of "Efficient Dynamics" on the instrument cluster is for the 12V battery and refers to BMW's now quite old system "Brake Energy Regeneration" (which charges the 12V battery with the alternator during braking, coasting or decelerating).
@NoBrainerTalk no no, your vehicle is staying at your garage because you are Fedor Konyukhov, by what device will you do it?)) I know already the answer, just please describe in your next video. Someone your friend should charge the 48V battery and 12v battery to avoid damaging to the batteries while you sailing a few months at sea. The cost is too high.
I believe in cars with the mild-hybrid the start-stop button is gone (i.e. the system is always on), and the system auto deactivates start-stop in sport modes (sport, sport+, traction, gearbox in sport/manual, etc.).
Fk-0ff. It’s brilliant tech and it works great. And it means YOUR kids won’t choke to death from smog before they graduate school…though it’s debatable if that’s actually worth it that they live
All to compensate for the stop start jarring technology which only furthers to complicate this engine. At least the mechanics will have a lot to do during servicing which will only add to the cost, at this stage you might as well go full electric because the way these ICE are made.
As cool as some of these systems are, it just further complicates an electrical system that was complex already. Let’s hope that the German Engineering can make this BS last longer than the warranty period. 😂
I guess it's easier to route existing coolant lines in the engine bay to new components, rather than add radiators or heatsinks or other heat dissipation techniques.
Thank you for this video. I have the 48v mild hybrid B58, and just as I suspected, servicing/repairing this engine is going to be a challenge😢
OMG, look at all the extra systems that can fail. That is a ton of extra complexity. WTF. Plus, all the starting and stopping the engine, and the fire hazard from the lithium battery. I am going to look for one without a mild hybrid. Thanks for the video.
Stupid take. It works great and it’s been around 4 years by now without any major breakdowns reported.
Wonderful explanation. I just got a used 2023 540i Xdrive and wondered what this was about. You did an awesome job!
Por fin! Thanks for this. Looking forward to the next chapter.
Holy crap! I had a 48v hybrid X5, I didn't expect the complexity of this 48v hybrid system in such a degree that even coolant was introduced to the starter which can be a trouble spot in the future...
very nice and a huge information
Nice explanation thanks
Can’t wait for the next video
I want to implement this system in my 2jz cressida. its so good😂😅
Could you please do a video on the new 2024 BMW B48 G60 530i mild hybrid engine ?
I''ll consider it. :)
@NoBrainerTalk thank you
so for reliability would the b58tu2 be better? and which m340is include this engine
No way to know comparative reliability until the TU2 engine is fielded in sufficient numbers across the platforms.
Very valuable video as always! Do you have any information based on BMW TIS documentation about valve deactivation system?
Hi there, do you mean in respect to cylinder deactivation system? If so, I do not.
@@NoBrainerTalk Yes, last time I doscovered a very interesting actuator on the cylinder head near exhaust cam consisting of two pushrods that act on rocker arm pin via som sort of pushbar.
I know there is no official info yet, but there is a rumor that a gasoline powered variant of the next gen M3 (G84) will have a 48v mild hybrid. How would it be used in that car?
I would expect S58 with mild hybrid to be similar to the B58TU2, as in there will be no alternator or starter-generator on the engine ancillaries and the 48V mild hybrid system will work with the gearbox. Oh my goodness it is almost 2025, and I still have not made Part 2 of the B58TU2 video where I was going to cover the 48V mild hybrid system... More details will come in a future video...
@ great I can’t wait to learn about the B58TU2 in a video of yours
The interesting thing is, in some certain market like Malaysia, Australia etc, never have the 48v mid-hybrid system, even the LCI and LCI II m340i and the m440i. My question is, for the non 48v mid-hybrid cars currently selling in these countries, will the engine models be updated to TU1 or TU2 versions like US and EU. Or is it that cars in these markets have been using the original B58 engine from the very beginning? Because they simply don't need a system adapted to 48V, it doesn't matter how many times LCI. Thx~
m340i and the m440i have the B58TU1, but you can have it with and without the 48V mild hybrid system. It's interesting that some markets won't offer it, this is likely to keep complexity and price down in markets where the regulations allow it. The B58TU2 is a different setup of mild hybrid but it cannot be offered as a non mild hybrid I think, so all markets with TU2 will get it.
@@NoBrainerTalk Thx for your reply. The B58TU2 appears to be a version specifically improved for the 48V platform, and the 48V platform will be a necessary step for BMW's future models. Unfortunately, the LCI II M340i I ordered will still feature the B58TU1.
Looking forward to more of your content-Great!
Thanks your video is great. I have two more questions:
1. Is the beefier 48V starter generator brushed or brushless? (My car sounds still brushed)
2. Is the drive belt anywhere different in the 48V models to handle that 11hp/120ft lb force? That sounds too much for a belt..
Thank you for your compliment and questions:
1. Wow, what a technical question, and to be honest I don't know. It would make sense for the starter generator to be brushless to give it a longer life, emit less noise, have higher efficiency etc. But you are saying it sounds brushed which might mean BMW went for lower cost option?
2. I believe you are correct that it is alot of force for the belt, and it's likely why the first start of the day is with the conventional 12V starter. The starter generator either keeps the crank in motion when coasting, or starts the engine when everything is already warm and lubricated with oil (i.e. least resistance), so that the 48V system is under the lowest possible mechanical strain. The belt is a different P/N and as you say must be a more robust design due to the aforementioned strain it is subjected to when starting the engine.
It has to be brushless with field orientated control from the electronic drive, also looks like it from the pictures.
Does this system augment the power to 393hp and 610nm in some scenarios then or is it not that simple ? Thank you awesome video !!
Hi, as I understand it, this system only assists the engine in the lower power bands and does not add more peak power. So the peak torque and hp remain unaffected. A dyno run of B58TU1 with and without mild hybrid system should however show different curves I believe.
@@NoBrainerTalk i feel like if i push the car from say 2000rpm in 2nd gear all the way up to redline that the eboost holds until it switches gear, third gear loses the eboost completely. It's a weird system. Thanks for your reply!
@@vandelannoitematthie Interesting. Thank you for sharing.
For longevity would it be better without the mild hybrid?
If not, would it be fairly simple to retrofit one?
Longevity of the stock engine block and internals may be extended by the mild hybrid system to some degree and under some driving environments. There are many variables I would say. If your engine model is sold with and without the system, as is the case with the B58B30B which comes with and without it, to retrofit the system should be relatively straight forward, it will require replacement of all the components that are different. It will likely be costly, and time consuming and need alot of programming to work.
@@NoBrainerTalk interesting, so the mild hybrid system actually makes it more reliable?
@@AW-gj4ji Longevity and reliability are very different. Reliability is more of a system characteristic. Longevity is more a component characteristic. I would not say that the 48V mild hybrid system makes the engine more reliable.
@@AW-gj4jiit’s been out for 4 years now. Haven’t read much about any major design flaws or failures yet.
Are there any disadvantages to tuning the tu1 equipped with the 48v system?
That's a good question and the honest answer is I don't know. Any added complexity over the standard internal combustion engine can be a factor.
What about PRE-TU mild hybrids? I don't see purple cables or 48v batts on those, yet they have the regen indication on the dashboard which you can also feel engaged as you coast or brake. Is there a video pre-TU?
Hi, there's no 48V mild hybrid system on pre-TU B58s. The regen indication of "Efficient Dynamics" on the instrument cluster is for the 12V battery and refers to BMW's now quite old system "Brake Energy Regeneration" (which charges the 12V battery with the alternator during braking, coasting or decelerating).
@@NoBrainerTalk So there's no power assist on launch then.....?
@@rodmanser7573 correct.
Do you anticipate the M240i moving to this engine for 26 LCI?
There's currently a move of several models to the B58TU2 so maybe that's more likely. The B58TU2 has a different 48V mild-hybrid system...
Charging by what device?)))
It's not a Plug-In hybrid so battery charging is managed through operation of the vehicle.
@NoBrainerTalk no no, your vehicle is staying at your garage because you are Fedor Konyukhov, by what device will you do it?)) I know already the answer, just please describe in your next video. Someone your friend should charge the 48V battery and 12v battery to avoid damaging to the batteries while you sailing a few months at sea. The cost is too high.
Will these hurt you when you try to replace the 48v battery ?
The system is considered just as safe if not safer than the 12V system, but care should always be taken when working with electrical systems.
So the 2025 m240i doesn’t have the mild hybrid
The 2025 has the B58tu1 which has this system, the 2025 didn’t get the newer B58tu2 which was introduced into the M340 and M440
@@JPRacing715is the b58tu2 better?
@@JPRacing715nevermind I just seen the video between both of them can we get a part 2 please these videos are very interesting
Hey. can be externally charged every day? or this can damage the battery life?
Hi, do you mean trickle charging the 12V battery? If so, this is possible.
i am wondering the same thing, primarily to fully charge the hybrid, it seems always at 2-3 "bars"
EXCELLENT description. Do the B48 engines in the 430i have the mhev system?
I believe currently it does not, and this is upcoming for the models with the B48TU2 engine.
Do İ have to turn on auto start stop system to utilize mild hybrid system?
I believe in cars with the mild-hybrid the start-stop button is gone (i.e. the system is always on), and the system auto deactivates start-stop in sport modes (sport, sport+, traction, gearbox in sport/manual, etc.).
@ thanks Mr.
Ah shet, they took away my water meth compartment with the 48v battery :(
11hp, surely all this is for tax breaks?
Not impressed ha? :)
Yep, its to save the world //politicians with subsidies
Fk-0ff. It’s brilliant tech and it works great. And it means YOUR kids won’t choke to death from smog before they graduate school…though it’s debatable if that’s actually worth it that they live
All to compensate for the stop start jarring technology which only furthers to complicate this engine. At least the mechanics will have a lot to do during servicing which will only add to the cost, at this stage you might as well go full electric because the way these ICE are made.
As cool as some of these systems are, it just further complicates an electrical system that was complex already. Let’s hope that the German Engineering can make this BS last longer than the warranty period. 😂
Why do this system need so much liquid cooling😢
I guess it's easier to route existing coolant lines in the engine bay to new components, rather than add radiators or heatsinks or other heat dissipation techniques.
Getting nerdy.