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BMW Valvetronic Variable Valve Lift
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- Опубліковано 31 січ 2012
- BWM Valvetronic Electronic Valve Lift
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Valvetronic engines use a combination of hardware and programing to abolish the need for a regular throttle mechanism.
Valvetronic varies the lift of the intake valves. Based on signals formerly taken mechanically from the accelerator pedal position sensor, the stepper motor changes the phase of the eccentric cam, modifying the action of the intake valves.This system has a conventional intake cam, but it also uses a secondary eccentric shaft with a series of levers and cam followers, activated by an electronic stepper motor.
The Valvetronic engine replaces the function of the throttle body by using infinitely variable intake valve lift. Valvetronic has its own computer housed in a separate unit away from the engine management system, networked through CAN network with the digital engine management system incorporating a 40-megahertz, 32 or 64 bit computer.
Valvetronic reduces maintenance costs, lowers exhaust emissions, improves cold start behavior, and provides a smoother running engine. It also does not need specific fuel grades or fuel qualities because of its fine atomization of fuel.
Because Valvetronic allows the engine to breathe ...
Get the whole story right here in this video... Enjoy...
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Amazing it works for 1000s of miles with no issues.
@audiomannn Thank you for posting. In all honesty, all this technology will trickle down to the rest of the manufacturers. It is really not that big of of a deal when you put it in perspective. It does make sense. The biggest issue with any gasoline engine are the pumping loses at the throttle body. An engine like this, with no TB, is a free inlet flowing engine. No restrictions, no loss. THanks so much for posting.
Thank you CojackM for this information. I almost always block or erase people who post links to other sites of videos, due to spamming, thank God I decided to view you post. This is fantastic technology. I will post on top as a new post, giving you credit for telling us and will also post on this channel's general broadcast. Thanks again. Mandy.
Wow, very interesting video, thanks for sharing. Very interesting how BMW revolutionized an entire industry with the first usage of computer throttle to engine control. Such a simple idea, but such complex design.
Thank you, yes I do answer all my viewers. If someone took the time to post here they deserve my attention. Thanks again for the kind words. I have various video SERIES here in this channel. This one, "BMW Automotive Technology" now has it's own book, DVD video, Kindle e-book and Android APP. The link is on the video description. Thanks for sharing.
@HamadHHAG Yes, it is believed that Valvetronic will trickle down to all other BMWs. It is really a Bosch systems, so we may see it expanded as well. The original idea was to use solenoids, but 42 volt systems were never implemented, so they made it servo-electronic. Thanks for posting.
Yes, to be fair a lot of these developments are usually joint ventures between BOSCH and the European makers. Thanks for posting.
Thanks for posting. I understand, what you're trying to say is that simplicity is the best approach. Unfortunately, those days are over. For whatever reason complex systems are invading the market more and more. Take a look at my series right on this channel, "GDI Gasoline Direct Injection" and the issues with these vehicles. But, GDI is also here to stay regardless of where you live. Thanks for posting.
These are very informative, I'm a gear head and love to see other manufacturers designs. They are all proven systems and work, some better then others of course but the ingenuity that goes behind these engines are spectacular. And its great seeing that you respond and answer peoples questions, even though UA-cam can have some really Obnoxious users and random outburst! I have a Automotive racing channel myself.. I subbed! Thabks!
The CAN has already been removed on Bosch Trionic fuel injection system. In Trionic the ECM uses the spark plug ion sense to detect compression. Individual vlve solenoid control has been done too, but the system needs too much current/power. The 42 volt system never materialized so it's not possible now, but who knows, it may still get put on the market. Thanks for posting.
this crap makes me appreciate my 26 year old chevy small block even more. nothing to it, and nothing to go wrong
trust me.. i've worked on just changing a valve cover gasket on these X5 and they're fucking nightmare.. piece of shit design! they're garbage
JOE FPOC ,ll
True. That would be the real thing. Since this kind of valve mechanism will also be very efficient in creating a dead hole in the cylinder which is essential in improving the brake force regeneration efficiency, the power required to run this electronic valve train will also be produced.
You know I haven't though about that. Yes you're right they can't use a MAP sensor since there's no intake pumping loss and no vacuum. All the Valvetronic engines I've seen have a MAF sensor only. Thanks for sharing this.
ADPTraining ahaha take another look! VDO makes the MAP
How did you get Stephen Hawking to do the voiceover?
RIP 🙏 He was like the Master of the Universe
@zuazo1231 Thank you. All we ask is that folks participate and keep posting. Good luck.
Excelente informacion ya que nos permite estar actulisado con las nuevas tecnologia que se incorporan en la industria automotriz .gracias al canalADPT Training y you tube
@roro560v8 Hi, yes in our opinion this technology, which is also used by FIAT, is amazing. The system does away with the throttle valve or body altogether. A very efficient gasoline/petrol engine with no air inlet restrictions. All it needs is a regular oil change. Than ks for posting.
We also have a video on Toyota's VVTi so take a look here at ADPTraining. No, valvatronic has nothing to do with CAM profile. It regulates valve lift. It is a unique system. The only other system that comes close to it is Honda's VTEC. Thanks for posting.
With pleasure read the description, listened and watched video. Thanks.
But on a subject I can tell - expensively to the simple consumer, especially in Russia where extremely bad and at the same time expensive gasoline, isn't present sensible service (yet everywhere М50 can repair) and as, there are a lot of parts and moving details (at us always - the more simply, the better. As simple example T-34 tank.) It is interesting that in my opinion the best car at BMW concern too 34
Toyota's VVTLI (not VVTI) is very similar to Honda's VTEC system but this is on another level. BMW have really taken the whole variable valve timing thing a step further
Is this narrated by a computer? The cadence is really confusing.
*Doesn't use a standalone computer as of the N52 introduction. The system is integrated into the DME.
BEST engien , N42B20 !!!!!
Fantastic... autodiagnosticsandpublishing.com/
Thanks for clear videos. I'm buying used N52 , i chacked 4 used engines in and out of cars. wondering why all the 4 engines 4 or 5 cylinders had 30-40PSI compression but 1-2 cylinders 160-170PSI. i tried to turn the Valvetronic by hand and the result was still the same. 3 engines no oil but one with oil. still, i cannot understand was this broken engine or related to valvetronics or Vanos? any idea please?
30-40psi too low.
0.00 mm valve lift is to shut the vehicle down. Makes sense?
I don't know if Koenigsegg's removed the CAM at all. Love to see you share some more info on that.
nice video but i had to replace the springs and that is a pain in the. ... nice video
There is a error in the animation - valvetronic did motor not rotate constantly!
if the valvetronic motor was removed, put it back on, and if it was not adjusted properly can that cause a random misfire???
Yes if the valve lift is too short under a load. autodiagnosticsandpublishing.com
Is this similar to Toyota's VVTL-i?
I understand both systems continuously vary's the intake valves, but does BMW's system switch the cam profiles to provide more intake and exhaust lift and consequently more power?
Yes depending on throttle position and
Question: what software are you using for text-to-speech? It's the best one I've heard in a long time.
It's a true robot.
is this the same thing that's in my dodge dart it has 2.0 vvt motor in it
Can it do cylinder shut off?
this is really smart stuff
Gonna need to be a manufacturer specific mechanic to just to to a simple tune up job with all this technology.
Who's Vvel?
yes the twinair!
Does Valvetronic work while driving?
Does it only work when stopped?
It does work while driving.
this is first version of valvetronic?
Ok by removing the throttle body, pumping lost is reduce right? The valve lift now control completely how much air go in to the cylinders. The cylinders are still sucking as hard as with the throttle body so how has the pumping lost been reduce?
Pumping loss is the resistance air finds at the throttle body plates. Pistons will travel the same distance no matter what. However, when the incoming air sees no intake restrictions, pumping loss is reduced. Whatever loss seen at the valve/piston intersection is minimal. Makes sense?
ADPTraining A gas engine has to have a throttle. The intake valves are now the throttle. The pumping loss is still there, just not in the intake.
No it isn't. I'm trying to tech you something but if you pass judgement then so be it. Sorry my friend and thanks for posting.
ADPTraining Dude, I learn VME 24 years ago. I will say its very high tech, but so was V-tec when it cam out. I wonder why more people don't use it.
ADPTraining I must say that I have the same question as blackericdenice: Aren't the pumping losses still there?- when the valves open less the air flows harder, and as an effect the engine revs less. Can you try to explain it a little bit,I would be thankful.
From what I understand diesel engines don't have pumping losses but that is because they don't have any kind of restrictors -they adjust power(and revs) by adjusting the quantity of fuel injected per cycle
P.S. I am a student on Vehicle engineering(final semester).
funny! that was the climax of the video.:)
Hi can anyone assist please I have reconditioned the cylhead on my e46 318i,reset the timing with a special tool,it starts but won't rev up or idle
It's not the heads then. If it starts it has to idle.
@@ADPTraining yes the car starts, it won't idle or rev up,if I connect the diagnostic scanner it gives fault code p1057 which shows a throttle body problem.
You mean like Koenigsegg's new Free Valve system?
pozdro z lekcji
Thank you. autodiagnosticsandpublishing.com
all new (2005-2016) petrol engine have this? combine with vanos?
not all
Thanks so much for sharing.
Does Valvetronic work while driving?
Does it only work when stopped?
It's a pity it doesn't work so well at high rpm. How do they get around that?
I've taken these cars at very high RPMs. Yes, the'll do high RPMs. Oil changes are very important to these cars.
scanspeak00 my 2011 bmw 528i has a very strange and "dead" throttle tip in under 3k rpm. over 3000rpm its extremely accurate and responsive, especially at high rpm
316i tons!!! XD
NO, NO, NO... You keep missing the point. VVTi and VTEC ARE NOT THE SAME ANIMAL. Totally different. VTEC and Valvetronic is variable valve LIFTING to timing. VTEC is a dual stage only valve lift. Valvetronic from BMW is infinitely variable valve LIFT and only Valve lift. VANOS from BMW is their answer to variable valve timing. You can have VANOS and Valvetronic at the same time. They're two different systems and we have videos here on BOTH...Thanks.
I do not know why the "Reply" function has been removed from the comments of this video, but anyway. So, to ADPTraining: You should know that specifically BMW leads the way in Engine Design, and Valvetronic is a great example of this: THEY designed, neither Bosch, neither Siemens, neither Denso, neither (ha!!!) Delphi.
BMW are actually so stubornly obsessed with in-house development, that they design actual electronics (Engine Management System, etc), for all their higher-spec applications (i.e. M- engines).
You should know that, at a time when everyone was equipping their motorcycles with Magneti-Marelli ECUs, BMW actually HIRED their top engineer and had them join the S1000RR project.
BMW have won more Engine of the Year awards that Porsche and Ferrari or Mercedes, there has to be a reason for this.
UA-cam is messing around with commenting on videos. We've done nothing on our end here.
Anyhow, I hear you. Personally, I've owned BMW for many years and they're great cars. They do use Bosch and other components, but as you said, also develop stuff of their own. The M class as in Mercedes AMG is a different story. These the best of the brand. German technology follows a specific quality path unrivaled by most. Even makes like Ferrari, there's always some minor oil leak or this and that with them. Thanks again for you post.
nomayor1 Ahahaha you are right, GM never give them any tranny ahaha
they are mad could anyone fix it
ohh cool, so its the most mechanically similar and complex design to solenoid controlled valves XD
What, org..what? I'm I hearing things?
lol that automated voiceover...
On an N46 engine, can Valvetronic be disabled while keeping VANOS still in operation?
+desertman123 Disable Valvetronic in order to be able to regain proper use of a throttle butterfly valve again, so that a set of individual throttle bodies can be custom fitted.
Im pretty sure valvetronic engines dont have vanos...
jolichja I'm quite certain you are not correct.
Then pls give me an example of an engine that does have both...
jolichja N42, N43, N46, N52, N55, N62, N73, B37, B47, B57, and B58
Ahhh I see, I shouldn't have been so ignorant to think that BMW could create something single handedly like that, are most of "bmw" inventions joint ventures? Such as ABS and DSC?
Can be disable ?
Dragos M. Pavel No this system can NOT be disabled.
+Dragos M. Pavel Why would you disable it? To render the accelerator pedal useless?
+tavi921 Disable Valvetronic in order to be able to use a throttle butterfly valve again, so that a set of individual throttle bodies can be customized for it.
+ADPTraining Actually there is a video on UA-cam, in which the owner removed the Valvetronic electronics from his car (including the VVT box).
2:39 everything is terribly wrong with that animation
Fran Cisco like what?
the system shown in that animation is ( somehow ) similar to a V-tec system, not valvetronic. There's no intermediate arm, no eccentric shaft, and the electric motor isn't actually moving anything.
I cant follow that voice!
Valveeetronic
BMW means Break My Wallet
u know from working on these cars this is really horrible design,, Honda has the best Variable Timing system on the planet ( simple and very effective )
BMW valvatronic is infinitely variable and nothing like Honda, which is a great system, but not the same animal. This video is not meant for comparison, but for those who want to learn the technology. THank you for posting.
This I know but the system itself is flawed and over engineered.example.. the eccentric shaft motor if not released properly,it could break the shaft stopper, gasket of the ESM through the VCG leaks, The ES sensor grommet about the cover leaks..they clearly could've done a better job... but ur video is very detailed I'll keep watching for sure
I do appreciate your point of view skill1855, we really do. In my opinion, the Valvatronic is a prelude to a fully camless engine, ala Konniegnegg. Camless valvetrain will breath new life to the ICE engine for years to come, whether they run on Gasoline or Natural-gas or whatever. Looks like you have experience on these vehicles. Your specific stories are greatly appreciated if you'd care to share them here. Good and bad experiences are welcomed. Thanks.
PS. Here's the link to the book & DVD.
sites.fastspring.com/autodiagnosticsandpublishing/instant/bmw_automotive_technologies
www.createspace.com/371201
@@ADPTraining what about increasing the power to this kind of engine?
Is it possible ? Wouldn"t it throw a limp.mode or something ?
I was thinking of moving the lever to.full.open position that would increase valve opening to maximum.and after this installing a bigger cam with valves and springs?
This recent video was brought to my attention by CojackM about new technology being developed for piston engines about CAMLESS cylinder heads. Do a search for the following: v=Bch5B23_pu0#!
Take a peek...
It's an experimental system that hasn't gone into production yet. But the results look promising. watch?v=Bch5B23_pu0#!
Hmnnnn. I call bullshit. No requirement for specific fuel? Better cold starts? Tell that to my E90
essa
You're welcome. autodiagnosticsandpublishing.com
Lol. All the more reason I'm not a fan of variable valve timing. Engine looses performance at 5k. Lift does NOTHING FOR PERFORMANCE. Nothing. It's the duration of how long the valve is IN the combustion chamber. All the more reason why I prefer my regular over head cam or cam in block. And no guys variable valve timing isn't difficult to understand or work with. It's just a bitch when your replacing guides and chains. Need special scan tools too tell the ECM too shut off the cam advance system. If us don't. You'll bend valves. And BMWs are proof too "valve float". Radical downshift. Piston smacks the valve at 5600 rpm. Far from race inspired. Sad.
vw2001vr6man how many false and uninformed statements can you make in one paragraph... Think you need a special scan tool for your head...now thats Sad
are you sure about this? Because I own a BMW with a Valvetronic equipped engine, and the full power comes within 6000-6500 rpm
Did you even watch the video? Valve lift DOES improve performance in this engine because it allows the throttle body to remain fully open reducing pumping losses. This improves low/mid range power and efficiency.
all i know is, honda vtec superior
Different
This video implies the reason for Valvetronic is to abolish the throttle body. Of course this is plain rubbish! The reason for Valvetronic is firstly to make the engine more effective. It so may be that this will make the throttle body redundant, which it doesn't of reasons mention later.
The video also states Valvetronic reduces maintenance costs! What a load of BS! Introducing complicated mechanic and electronics (a separate computer) will of course make the engine LESS reliable. There are plenty videos on YT on repairing this technology.
I wonder if this technology really will benefit the user in terms of less fuel costs.
I doubt it.
And at last, they didn't get rid of the throttle body. It still is there due to safety reasons.
It wouldn't heart with only a little bit of critical thinking...
For this shit valvatronic system i well not gona buy BMW never ever agen!!!!