iVTEC How it Works -EricTheCarGuy
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- Опубликовано: 22 авг 2024
- iVTEC How it Works is a long standing requested video. Back with I did the video on the VTEC explanation I was asked about doing a video on iVTEC which is slightly different than VTEC. First you need to understand the basic operation of the cam shaft, once you have that, and you know a little about how that cam shaft effects performance, you can then begin to understand how iVTEC works. In essence, as far as the Honda system is concerned, it varies the cam 'timing' to optimize performance and fuel economy. Many companies employ similar systems to this but they may perform the operation differently. This video focuses on the Honda iVTEC system.
That said, you may notice that the VTEC system on this K series is a little different in that instead of having a cam with a higher lift and duration, it switches between 1 and 2 valves on the intake side. So when VTEC engages on this engine it actually activates another valve in the cylinder instead of changing lift and duration. It still alters cam timing via the iVTEC system however. Once again, to optimize power output and fuel economy.
Either way, I hope this video helps with your understanding of camshafts, cam timing, lift, duration, VTEC, and iVTEC systems.
Thanks for watching.
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Hondas are really good cars!
266k Hell yea
Hell yeah i just got myself a 06 honda accord LX 4 cylinder just now gettin broke in lol at 100k got it with 99,000 before i had a 08 toyota corolla until i totaled it n i gotta say i like my honda accord way better than i did with my toyota corolla its hard 2 say which 1 is better 2 me toyota and honda are about the same in terms of reliability but i always heard hondas automatic transmissions are a little on the weak side thats why im making sure mine i change the tranny fluid and filter and when i do that gonna put lucas transmission stop slip in there thats the only down side with honda is there automatic transmissions are on the weak side so if you wanna stomp on the gas and b race car driver your best bet is to get a manual trans. But as long as your doing normal everyday driving and dnt beat the shit outta your honda race it then the auto tran. Should last i would think
Beautiful, Superb, difficult concepts in the most simple and practical terms. Congrats Eric you cleared all my concepts regarding the iVTEC. Two thumbs up for you.
This series should be called "Eric Explains..."
In case you ever wondered how iVTEC works. ruclips.net/video/SBZLch1gy_M/видео.html
Everyday is a learning day. Thanks Eric
💋🎬🇬🇧♥️⛄️
I heard a rumor that somebody was bypassing all this complexity and going straight to fully-hydraulically-actuated valves, controlled by electronic signals. It allows full control of lift and duration at all engine speeds.
Erik Swiger F1 has been doing it for years.
Erik Swiger koeniggsegg has been doing this for a while. (Correct me if I'm wrong)
xFreeland1 nope your right, i saw a vid by them a few years ago and they had modified a Suzuki head and they were runnin the engine with no cams, all hydro valves computer controlled
I love the way you explain things that are usually complicated to explain into way even a non-technical person can understand.
Thumbnail of video reads "ivetc" if no one has told you enough yet :-p always great info, Eric. Always humbling what little car knowledge i have. Hope everyone had a merry christmas, and happy new year!
Rob T Fixed it. Thanks.
Another awesome educational video from ETCG! I've always wondered what the difference was in all vtec systems now a days. Plus for someone like me I've done better with instructional videos than just straight reading it out of a book. You have no idea how thankful I am for guys like you to share knowledge like this.
Awesome video Eric. The analogy between computer program and what the cam shaft does for the engine was done!
I like the -physicist-way you present your explanations. it is because you teach the principles, so understanding it is easy.
thanks a lot. Nigeria.
A very informative video, Eric you are really knowledgeable on every topic discussed. I enjoy all your videos. Keep it up man, you're doing an awesome job. 😁👍🏼
This is why I love hondas.
A good followup video called "The Future of the Internal Combustion Engine - /Inside Koenigsegg" shows an engine that instead of using a camshaft, each valve is individually controlled by a electromagnet. Basically makes it so each cylinder can have its intake and exhaust individually tuned.
Excellent. Thank you very much for describing it so clearly and not speaking too fast like others I’ve seen on here. Good job.
I've really gotten into Honda engines over the last few years. They're very interesting. My current dream car is a Lotus Elise with a super charged K24.
Just gotta make sure I keep enough money in the bank. So I can jump on the first one I see with a blown Rover engine. And hopefully get it for dirt cheep!
nicewknd
They started with the Rover, then switched to the Toyota a few years later.
Thanks Eric. Just learning about i-vetec & vetec.
Great job as always Eric!
will be great when engines finally have solenoids to control valves so we can have infinite variable valve timing for each valve
Koenigsegg now uses pneumatic for their valves instead of camshafts. I would imagine those are pretty much as variable as you'd want them to be. Cool technology for sure.
@@johanneswarn5488 But for a reason on a car as expensive as that. It'll for sure be less reliable and more expensive.
Thaks Eric that gave me a better understanding of my Honda Accord Euro IVTEC engine. I never could get my head around how it worked! Thanks Mate Johnno
Thanks. And very well done. Much more informative than several other well-known channels.
Lol, the thumbnail brought me here. Waiting for the "VETEC" to kick in.
Fantastic explanation in very understandable terms. Another great video!
Eric, Thanks for having a Honda Element! I haven't found a shop manual specifically for the Element, but I have made repairs by referencing your videos. I also enjoy your videos that don't feature the Element. Thanks for being there!
Great learning session. I appreciate your concise way of explaining - makes things really easy to understand. Thanks.
Eric man; you, sir are a mechanical genius. I greatly appreciate your abundant wealth of knowledge, nay, even. Your ability to deliver said knowledge. We're not worthy!
Eric you have a great channel I've seen so many of your videos from fixing CMC to complete clutch replacement. great stuff man!!
A foolproof demonstration and explanation. , Thank you very much.
Thanks for this video Eric...i have been following your excellent educational lessons and this brought more clarity into how these systems work and relate. Please keep the good work up because students and professionals on the field are banking you guys.
Amazing video, I learned so much! This is my first time watching a video on this channel and I am happy to subscribe :) Keep up the great work.
EricTheCarGuy Please make a video in which you explain the Atkinson cycle and it's pros and cons, as well as the (so they say) 'pseudo-Atikinson cycle' that Toyota uses in their hybrid vehicle engines and what that's all about!
Oh, and: Happy Christmas to you and your family, as well as a good start into the new year!
Thank you for this great explanation video!
Keep the video short. Straight to the point. This video can be done in less than 5 minutes
Thanks for the education..
very detailed and good piece of information. Seems from what I know is it is exactly the same thing as VVT. You've done a good job of explaining it.
always awesome work on your vids. I've been getting information from you for years and would like to say thank you.
Hi Eric: based on Honda service bulletin 13-085, the Honda J-series engine with iVTEC system causes the engine to start prematurely oil burning in cylinders 1 ,2 ,3. Apparently, when iVTEC engages, this causes the rings to roll on the pistons which in turns causes oil burning. Can you shed some illumination on this topic. I dont understand what is going on. Can you do a video on this interesting situatioin?
As usual, thanks for the video on Honda product. I've got a 2003 Element still goin strong, and have checked out your vids several times for info. Keep those Element vids comin' !
Thanks again, very informative.
VERY important to change the oil regularly in those engines! Especially GM Ecotec!
You should leave Friday to the true repair videos and select a different day for info type videos like this.
Thanks so much for this.
I'm just learning about engines and you explain things well! Keep the info. coming our way! 😀
This is the engine that kids like!
Great Video! I think BMW accomplishes this same task with its "VANOS" system..
that's a fancy music box you got there.
So does that mean the iVTEC kicks in different rpm depending on the scenario?
Ki Y Kim That's the one. So if you're flooring it in a low gear then you'll get VTEC happening later but if you're in a higher gear you'll get VTEC happening earlier but if you're at high revs and increasing them slowly in a low gear then you won't get VTEC. Another way to view it is that it's really difficult to replicate a scenario for ivtec to happen as it takes in so much data but VTEC will always happen at a certain point.
My K24A3 ivtec has been ECU reflashed to always activate at 4600RPM WOT
Patrick Patrick what I didn’t know you could do that. That’s crazy! What does WOT mean? Could you do that on a Acura TSX?
@@joshuatorrez7608 Wide Open Throttle
Also, there is the VTEC system Honda used on the 6th Gen VFR800 motorbike. This system switches from 2 valves per cylinder to 4 VPC at a given RPM via the follower. Cleaver system but very time consuming & expensive in parts (shims and buckets) when doing the clearances. Honda stipulate this is done every 16k miles!
You should really do a video on how VVT-I and VVTL-I work.
He'll have a heck of a time finding a 2ZZ powered car to show off VVTL-i. They're not all that common.
I had the VVTI on my '04 Toyota Celica GTS. Awesome engine. Was almost unbelievable it's power output was equal to it's displacement. 1.8L that could put out 180HP.
ITS EXACTLY THE SAME
Haloruler64 really there not rare in england iv worked on em a few times
lukethekanefan they're not rare by any means, just uncommon. I don't see many Celica GT-S's around anymore.
iM surprised that Apple hasn't sued them yet for trademark ambiguity...
SSShhhh don't give them ideas.
That's why it's called "I-VTEC" and not "Ivtec" ;-)
John Bond the i in i-vtec stands for intelligent.
Lol should be the other way around.
i vtec was designed and came out before the i phone was release and invented. Smfh. Honda cam technology was the first of its kind from late eighths now all manufactures copy the setup
IMac came out in 98, I VTEC was in 2001..
BMW has dual VANOS that changes the cam timing on both cams that is similar in concept as iVTEC. The M54 engine has dual cams with dual VANOS and hydraulic lifters that don't require adjustment. The bad is that it has an aluminum block and when you over heat the head one time, it will pull all the head bolts straight out of the block from the head swelling and ruin all the threads. Ask me how I know, go head, ask.. haha
How sway
+jimenez jaime He doesn't have the answers!!
how Thor mcgee?
k-series are great engine!
Actually, the head he took out of the civic was an R-series.
This is awesome knowledge overload. The intricacies of this system are amazing. Nothing better than telling a VTEC owner what VTEC actually is and does.
Are there any other motors (non-honda) that have a similar system?? Or is the Honda VTEC a one of a kind??
bmw has Vanos
Whoops used the word 'motor', Should be 'engines'. Don't let the trolls see that.
Darren G. I heard that VVTI is basically the same. i don't know though.
arnaldo vargas
I had heard the same thing. Many companies just dub the same thing under a different name so it wouldn't surprise me.
almost every car manufacturer has "variable valve timing" which is essentially what vtec is. its not a honda thing by anymeans. and im a honda owner
My bump stick has timing issues(it shoots out too early) but i still have fun with my bump stick. Wine helps me delay my timing a bit😝
Thanks for the look at the dual and single overhead cams and the explanation. It you take the i part of the cam apart, make a video, I'm kind of curious what that looks like.
Excellent video sir.
Awesome video man I love learning!
Vtec is the dual cam lift mechanical (two different lobe sizes for same valve group). VTC is the timing of the cams software controlled VTC is only on the K series, while vtec is on most Honda engines. Programming using hondata device has another layer of work on the K series of engines.
Vtec has no equivalence in the other brands (no system can change both duration AND lift of valves) while VTC is almost equal to BMW Vanos system (phase timing). I thought it was necessary to differentiate the two sub systems.
Loving your videos, very informal, keep up the good work
Thanks for the info, very interesting.
Lol my SOHC VTEC goes bwaaaaaaaaAAAAAAAA
I gotta say, you can't really tell on R-series when VTEC really kicks in. Because it's alreacy using VTC to change the timing. But like all Honda engines, once it gets momemtum it just continues pulling until the limiter.
Hondas were a really good cars in the past, now so-so.
The Element engine like to eat camshafts, most likely due to lack of proper lubrication, but could be the lift, advance settings on that engine.
Just like all of your videos, super helpful. Thanks bro!
It would be interesting to see power and torque curves with and without ivtec active.
Use Google to look it up...
Very informative. Thanks again Eric
Now we just need a video on the hydraulic infinitely variable cam timing of the Fiat engines. They run off cams under normal operation, but they can also be individually and hydraulically controlled giving each cylinder the ability to run at it's optimum efficiency when under heavy load. I am assuming that these engines run with cam shafts still because over the course of millions and billions of rotation the camshaft will hold up better than the hydraulic actuation. If the hydraulic actuation were in effect and that failed after 150,000 miles... well... you'd be stranded.
Thanx muchissimo for the simple explenation on a complex topic ^_^
Thanks Eric for the informative videos
good video. however you should mention that this ivtec you explain is on a dohc head. the ivtec on sohc engines like the r18 has a variable and computer controlled point of vtec engagement with respect to engine rpm. cam phasing on a sohc head would alter the exhaust timing too which may not be beneficial!
will this fit on my honda
More than likely, most Honda parts are interchangeable ,just find a head that has ivtec and get an ecu from a bond prelude with an h22
only true fans will understand this. haha chopped
great video!
thank you for this helpful video, I am excited to see more.
Hi Eric,
I like your video a lot, I can learn a lot from you....
I am mystified by how "smart" cars have become, just over my life time.. Awesome
I don't think the "i" means that the valve timing is adjusted. My Honda iVTEC engine does not have a cam "phaser" to adjust the timing. The iVTEC engine activates the long-duration, high-lift lobe for economy whereas the VTEC activates that lobe for power (as in the K20 engine). The cam phaser on your engine is part of the VVT system.
sounds naughty when you said have fun with your bump sticks
Thank you Eric very valuable information
Well said... Thanks for the infos and keep it up master mechanic ETCG!
I believe on my Honda Civic I have a switch that has 3 settings Economy/Normal/Sport. I believe that is the I in I-Vtec.
Newton metre is a unit of torque not power as stated in the video.
Very good video. Very informative. Thank you for posting it....
The i-VTEC in the R-Series (R18A2,R20A3,...) works exactly the opposite what Eric told us:
asia.vtec.net/Engines/RiVTEC/index.html
They use the big cam lobe for normal driving and the high cam lobe for low load conditions to reduce pumping loss.
Yup, for R18 engines (economy i-VTEC), high lobe opens up longer for engine to work in atkinson cycle to be more efficient.
Great info and well explained.
bought my 06 accord (same engine) in 2011 and have not had one single issue with anything in the car since, ivtec is definitely noticeable when passing people, but I can only compare with my 04gmc grand caravan lol
interesting video , my car has variable length intake runners , I Googled that to see how it worked , I realize that iVTEC YO, is not the same thing as variable length runners , but I find it interesting how my car works .
seasons greetings to Eric and to all
commodore665 Not quite the same thing. Here's a video on that. ruclips.net/video/4jruZL5UCSA/видео.html
EricTheCarGuy
Thanks for that link .
+commodore665 Dat iVTEC YO
Each time I watch your video clips always so much to learn and so much to gain from them.Good explanation and good teaching right there. Thumbs up for you Eric.Aziegbemhinjacobpe.
just to be accurate the camshaft lobes only open the valves they don't close them. valves close from the tension of the springs. its not a desmodromic system that the cam actually opens and closes the valves..
technically they do not close the valves, but they do control when and how quickly they close due to the other side of the cam lobes.
have you been watching MIGHTY CAR MODS? HAHA cool video Eric! hope you had a great christmas and have a great new year.
So this is very similar to the Toyota 1.8 190bhp 2ZZ-GE which has VVTL-I which has both lift on the intake and exhaust valves and intake timing change which the VVTI only engines also have.
the I-VTEC and VVTL-I are identical
Hi Eric...so your saying the computer CPU...controls solenoids that send oil to the mechanism to change the timing and the amount of lift each camshaft has...so in a sense is this why you can change the computer chip inside it to gain more control over that system..???? or have a completely separate CPU or control (box) that could be adjusted on the fly...
Just had to replace that VTEC solenoid on my 02 CRV. Great video and explanation!
Basically it changes your little fuel efficient engine at lower rpm into a pseudo F1 at higher rpms when you floor it. That's the whole point of it.
Yup, wish I had a type r
Eric: Does it WORK? Can you actually tell a worthwhile difference between engines with and without VTEC/iVTEC? There are engine designs being developed that do away with the camshaft entirely, control the valve timing electronically, and operate the valves with big honking solenoids. They are are MUCH more flexible over a wide range of conditions than cam based systems and I can't help but wonder if these SLIGHTLY variable cam designs are worth the hype. In other words, did they just invent a better buggy whip?
i would imagine that camshafts are not going to be around for much longer. Koenigsegg now uses pneumatics to control the valves in their engines = no camshafts. It's just a matter of time before that technology finds its way into normal cars as well
thanks. Very enlightening video.
Hello, I think the name of the feature that change the cam timing on the fly is VTC (not iVTEC wich is the naming of the engines of a family) the explain and the principles are right, it is just the name of the thing "VTC".
vtec is just what honda calls their "variable cam timing. vvti is what toyota calls their variable cam timing.
every manufacturer has the same thing under different names.
I'm surprise that to date no one has developed a solenoid type valve system so it can be controlled electronically.
Eric, are lobes always machined from a block as parts of the camshaft or can they be screwed onto the camshaft at different angles with Allen screws?
I like your videos. THey are well detailed.
Dear sir,
Please could you explain the iVTEC system specific setup on J35 Accord engines 8th gen + up? Answering: 1- if it has any affect on performance like usual VTECs?
2- How it really works to disable cylinder banks?
3-If it reduce compression during could start or whats happen during start making sound much higher and lower down after some seconds?
If you could possibly do a video on Nissan's VVEL that'd be freaking awesome
this may sound stupid Eric, but are Honda ivtec engines interference engines? I know Nissan's are but with ivtec that would be risky right in case of ivtec system failure?
+Azureecosse thank you for answering that
So when the vtc actuator (intake cam gear) is locked what phase of cam timing is taking place? Like when the engine is off, is the gear locked or unlocked? Thanks
"""You know your stuff , well done """
Excellent video