Fiat Multiair Technology Explained

[SirMosesWellington]

They need to get GDI on the MultiAir engines. I know its harder and more expensive to make GDI, but it should be cheaper and better than doing MultiAir. And if you combine the 2, then add a turbo and maybe that 9 speed auto from ZF ;) gonna be awesome.

[moondogcow]

Yet it's not GDI? why?

[davebig28]

more to go wrong

[viperconcept]

I think that now it's better to invest in other energy resources. Gasoline is going to be obsolete now.

[anassgame]

FIAT THE BEST

[testacorsa150]

yipeee! - finally a real step forward in petrol engine technology. So much more fun and responsive to drive that a diesel.

[AdMiRaLeDpIeTt]

site me some examples of HP and how many liters for this to work.

[ConteZero76]

@AdMiRaLeDpIeTt

Search Alfa Romeo MiTo multiair on wikipedia.

1.400cc TBI Multiair delivers 170cv.

[ollonsvin]

@AdMiRaLeDpIeTt

Alfa mito QV, 1.4l with 240hp

[bigmedge]

I don't quite get it, what's the difference between Multiair & any other variable valve timing technology?

[MrLowAltitude]

@bigmedge Todays engines with variable valve timing can (As the name says.) adjust the timing of the valve. The opening time and stroke remains, they just shift the timing of the valves.

With multiair, they are able to control not only the timing, but also the stroke and opening time. So you don't need a throttle body anymore because you can control the air flow with the stroke and opening time of the valves! It's genius!

[viperxraptor2001]

@MrLowAltitude ferrari could use this technology

[lbgagliardi]

Why not make it in conjunction with direct fuel injection?

[shamarone]

for all it's "cool factor" there is a sobering reality to machine design and mass production.  added complexity ='s more failure points and so begets 2 questions that will probably be best answered in time...? #1, how reliable is it...? and #2, what's it cost in parts and man hours to repair if and when it does break...? and trust me... it WILL break. EVERYTHING fashioned by man inevitably breaks.

[shamarone]

ok NOW i see why this won engine of the year...? it is basically just variable valve timing, something that honda and most mfgs now all have a spin on. but, being able to "double tap" a valve during an intake stroke is definitely something not done before. this is analagous to the multi injection events being employed by modern common rail diesels. what we're seeing is prolly the first commercial application of F1 valve control learned from ferrari. albeit hydraulics substitute for pneumatics.

[richardmaudsley77]

Rebuilding these cylinder heads is going to be a huge pain in the arse. I'm wondering why this isn't on the Exhaust valves though.

[shamarone]

@richardmaudsley77 i think it's been found that very little is gained from mods on the exhaust side...? at least not enough to warrant the added cost and complexity. since it's "before" the combustion event, anything that optimises volumetric efficiency (turbocharging, supercharging, porting, VVT, direct injection, etc.) yields the biggest returns. this seems to hold true for most engines. rotary, piston, turbine, gas, diesel, motorcycle, car, truck, airplane, etc.

[Cypern]

That is cool...Fiat rocks

[anassgame]

and Fiat was the first whos product the TURBO DIESEL IN 1948.



[AngelDimov85]

Тез клапани колко пъти ще се отварят да вкарват горивна смес???

[vikkiandbradley07]

not really, vvt is totally different, vvt only changes the valve lift to change the valve over lap to control the torque and use one of two FIXED lifts, meaning its still controlled directly by cam and can only use one of two profiles, a low profile for slow speeds and a high profile for when power is needed or over 4/5k revs

the multi air controls the valve lift and any giving rpm/speed/condition and adapts to the

[TheBakersPeevy]

@vikkiandbradley07 thats called the v-tech mate, vvt does not change lift, it only changes the valve timing

[787Bisurdaddy]

Actually, it's VTEC, not "V-Tech," and VTEC doesn't incorporate variable valve timing... i-VTEC does.

VVT doesn't incorporate different cam profiles, but VVT-i (gotta love these name schemes) does. i-VTEC and VVT-i do the same thing, but started out from different directions.

[TheAXL35784]

@787Bisurdaddy

i-VTEC and VVT-i don't control the valve lift and timing in efficient mode as Multiair, because they can't work on full range of engine rpm.

PS : sorry for my english

[vikkiandbradley07]

situation i don't see the vvt opening the valve twice to optimise fuel and air flow or using no direct valve control to optimise the air it needs,

for example going up a hill in 5th say 40mph it doesn't matter if you have the foot flat to the floor or half throttle it'll do the same job but use more fuel so you will see in this car even at full throttle it would realise rpm isn't rising consistently to the throttle on full and stop it just dumping fuel in there making it rich when not needed!

[MKUltraProject]

is this just not the same as variable valve timimg? this is no big deal by the sounds of it

[vikkiandbradley07]

read above

[shalmaneser]

if you watched the video then you'd know it's not. It is a big deal.

[serchmarc]

WHAT MODELS HAVE THIS TECHNOLOGY OR IS JUST PROTOTYPEs?

[niznikb]

This engine is already available in latest Alfa Romeo MiTo (1.4 liter turbo).

[serchmarc]

thx i researched i know thx

[antikira]

very clever improvment,but is but 4 my job as mechanick car technology moves so fast damm :(

[Santoslhelpa]

WOW!

how would this multi air technolgoy increase efficecny of renesis 16x

how would a diesel renesis 16x look wiht multi air and a biturbo

hmm

[CoupedUpSR]

Really? Rotary engines don't have valves... This would do nothing for rotaries.

[Santoslhelpa]

rotary engines have differentchambers as pistons. and that airsupply was managed  also centrally.

the major benefit of this system seems to be hte independant regulation of airsupply

wether hte valves sit on cylinder or are somewhere on teh way of airinlet of rotary engine.

is not so important here.

[lateboy4]

so why cant you use the solenoid alone?

[plug007]

wow this is a great idea and will hopefully get better over the coming years, however we have to consider its a fiat and as this is new technology things will go seriously wrong. You mark my word.

[Negotinus]

FIAT-ALFA Projects were core to all other cars, FIAT-ALFA FOREVER!!!

FORZA ITALIA!!!

[silbergeist]

I finally understood

[carletto750]

another great italian job! GO FIAT GO!

[sithlordsoup]

The hydraulic actuator part of the system is huge,so in order to fit it into a normal size head, Fiat had to reduce the number of camshafts to one per head. Cause you know. Single cam technology is oh so excellent these days.

[darkie22gr]

i has hight hopes for the new alfa romeo MITO but now i don't think it is a bargain..

[darkie22gr]

and if i judge by the FIAT PUNTO HGT intake cam phase variator that would break after 40000 km then it would be just plain disaster i was hoping the italians would stop ruining their fame they just make ford and jap cars look good..

[darkie22gr]

that sucks so if i understand correctly and the solenoids leak oil somewhere the exhaust camshaft that is mechanic and can't be stopped at rotating at 4900 rpm let's say will drive the valves right onto of the piston head ruining your day and your pocket.. well i was kind of hoping both cams where electronic then it would make sense but now you can't modify as much as you want the combustion cycle you will still have to reprofile the one cam that is mechanic to get a boost in hp.

[michalbeast]

Would be nice to make it even more efficient, move the camshaft in front of the current one and add the same mechanism for the exhaust valves. That would move it to a perfection. Then the driver's only hope would be that none of those 16 solenoids decides not to work properly or that there won't be a leak in the oil hydraulic system. But anyway - there's no more a real polemic as for whether or not going electronic...the pure mechanic solutions of valve timing are probably a history...

[Liboni85]

FIAT: Yes, we can!

[BeCiO777]

god job FIAT!!!

[aretino72]

Great job fiat!! from the inventor of the common rail. the petrol engine multiair. less emissions, less consumations, more power. Great design!!!

[UKChris012]

I think that's the cleverest system of all the other manufacturers. The most responsive and flexible system because of high pressure hydraulics. waay more flexible than vtec, even more responsive than valvetronic. sohc and non metal actuators I would think make it lighter than valvetronic. simplicity of sohc and fail-safe to conventional full cam mode. Brilliant.

[seasonedtoker]

it doesn't matter if it's a FIAT or not. complicating the valvetrain always gives some drawbacks because it is one of the most stressed components of the engine. the only variable valve system that is foolproof is honda's vtec.

[707dude707]

Yes Variable Valve Timing 4 everybody

[danzyl]

I'm going to make a real bold prediction... we're talking about FIAT, so it might all very innovative and real cool sounding. But get ready to have an engine that's going to breakdown all the time because of the solenoids and the electronics, it will be a maintenance nightmare

[FiasaPower]

They said the same about electronic injection fuel system ...

[joker19583]

interesting technique, but unless I get to drive one I stick to my carbs

[seri267]

i like valvtronic from BMW more...it has some similarities

[koffiezet]

Valvetronic is less flexible because it uses an electric engine which is useless at high-rpm. It also still requires a butterfly throttle.

Multi-air doesn't need this anymore. It is mechanically faster to open/close the valves because it's hydraulic and based on high-pressure injection technology FGA developed for it's multijet diesel engines. This means it can open/close multiple times per cycle. It's also controllable per cylinder so can react to different thermal conditions in each cylinder.

[UncleGiun]

Fiat was the first company to build a DOHC engines (1912), the Alfa Romeo 156 was the first production with a Common Rail diesel engine. Opels and Saab's were using Multi-Jet engines.

Fiat developed along with Magnetti Morelli Common Rail diesel technology and sold it to Bosch in the 90's because they were in financial difficulty.

So really, it's no surprise to me that Fiat innovated again with Multiair.

[Mawerik024]

All perfect... But "Magneti" with only one "t" and "Marelli" not "Morelli".

^^

[ohmannhey]

@UncleGiun

I believe the first Common Rail Diesel was in the Fiat Croma ... ;-)

[ION1993OCTOMBRIE]

@UncleGiun I am surprised that FIAT is so modernized! Grate!

[Marillionado]

FIAT has been pushing the envelope on small engines for ages and I hope that with this new and exclusive technology they will get real benefit from it, rather then selling it to Bosch like the diesel Common Rail tech some years ago.

[windexplore]

Hallo ,

I try not to kiss anybody's ass , so .

Ask yourself these question : With the help of which German automotive parts manufacturer the Multiair sys was developed ?

The Uniair Sys sounds familiar to you ?

I got myself a kick in my balls from this Group where I was employed at , so I'm not kissing asses , but I did some CFD analysis for the Uni Air , which now you consider a pure Italian concept called Multi Air .

I expect your comment on this subject .

[Trulyloyale]

of course you got lost fater 30 seconds into it : this talks about advanced technology, top engeneering & amazing ability in innovate car's technology , all things the average american knows nothing about ....

But nobody can expect anything different from people who used to love so much those ugly, crappy typical big motor bulls

and used to call " sport car " such a ridiculous & horribly styled piece of steel like the Corvette ....XDDD !!!

[Trulyloyale]

after  replaces wrongly typed " fater " , correction there

[Alfista1988]

Fiat builds the best cars today!!! Thats fact!

[Ennester19]

you are only a looser you simply know nothing about FIAT!!! Go and buy your Opel.

[Alfista1988]

You are only a patriotistic german(Nazi)who unlikes italians, like we see in newspaper when Fiat going to make an offer for Opel. But dont worry be happy at the next ,Fiat will be the next boss of Opel. Bye German Child!

[roasthunter]

Wake up and get your facts right we're not stuck in the 1990s like you obviously. Just as a start who makes the most economical range of cars in Europe......?

[cannuckistan]

Cheap materials; honestly somewhat true. High loss of value; true but this is abating as people are becoming convinced of the quality of the cars. Fuel economy: are you kidding? Fiat has the lowest carbon emissions and I believe the highest fleet fuel economy in europe!! Oddly enough, I'm not so keen on their designs, but taste is a personal matter so it can't really be disputed.

[Chick6517]

on a scalle from 1- 10 taht was definiatly a 10 i like how you ended it VERY FUNNY haha ... i didnt think i could luagh so much not only that but i luaghed so hard [=

[kylio85]

I CANN'T wait to test one of the future engines engeneered with this innovative technology

[ollonsvin]

All ready in production in the alfa mito and grande punto. Production power for the 1750cc engine in the MITO GTA 240hp in that litle engine

[fuellistakenm]

That's the new motor off the Alfa 159.

And it's not Multiair.

[ollonsvin]

No your wrong, i know because i work for Fiat powertrain. and yes the MITO GTA engine will be with multiair

[Xenos105]

THe 1.750cc 200hp that is now on the 159 is not multiair it will be adapted the multiair tecnology to it later

[mrjost55]

I got lost after 30 seconds into it :D

[italy430]

if you got lost after 30 secs it just means that this video wasn't meant for your audience.

[pipari44]

no offence

[DagoBoogieMan]

wtf was that all about..so is the car just one big air compressor now?

[Darthvex]

I'm sorry, WHAT CAR IS THAT? Is it a Grand Punto facelifted???

[cmtmusik]

It's just an concept, it's not real.

But it can give us some suggestions about the future cars.

[gOnzoLT]

more electronics more problems i say. but if they manage to make it long life way it is a big advantage

[tranceme24]

Cool, if I knew more about that stuff!! haha

[ironchopsticks]

so basically digital control of the engine enhances it - that's why now we can have direct injection engines which improve efficiency and performance. Before without digital control engines were sloppier.

[jstnhnh]

Nice