Comments on: Fiat reveals a new engine technology: MultiAir

By: tansri

tansri — Wed, 11 Mar 2009 11:29:30 +0000

[quote comment="219580"][quote comment="219447"]fiat again… if i not mistaken they r also the first to implement the vvt technology…[/quote]
Yeah! And not only that. They are also the father of modern Common-rail direct injection but sell the technology to Robert Bosch shortly thereafter because they was in a bad financial situation.[/quote]

yeah..
let us pray FIAT merge with p1!!!!

By: MyBoy

MyBoy — Wed, 11 Mar 2009 04:29:25 +0000

[quote comment="219447"]fiat again… if i not mistaken they r also the first to implement the vvt technology…[/quote]
Yeah! And not only that. They are also the father of modern Common-rail direct injection but sell the technology to Robert Bosch shortly thereafter because they was in a bad financial situation.

By: James

James — Wed, 11 Mar 2009 04:19:17 +0000

IMO this is the best implementation of the variable valve timing and lift system. with such system, the lift and the timing is very easily adjusted without major modification.

The system should be cheaper (single cam) and the hydraulic system is very flexible.
as an example, the common-rail diesel injection system revolutionize the diesel engine. previously diesel injection uses mechanical system similar to camshaft. such system only permits single injection per cycle. with the common-rail system, multi-injection/cycle is possible for the first time and this makes diesel engine quiet, powerful, and clean.

after seeing this, other systems from toyota, honda, BMW, Nissan, etcs…. they are so outdated!

By: PTAllTheBest

PTAllTheBest — Tue, 10 Mar 2009 17:06:14 +0000

fiat again… if i not mistaken they r also the first to implement the vvt technology…

By: tansri

tansri — Tue, 10 Mar 2009 12:07:45 +0000

yeah..even if they have financial prob, they cannot afford not to invest in r&d..r&d is a must..
that is why a smaller scale car manufacturer lie p1 cannot survive alone..
let say they only have half of the moneys invested by the big car company for r&d, we can say the smaller car company have to be two times smarter to be able to compete with company like FIAT..haha..other wise, forever company like p1 cannot compete directly or become as big as the others..

By: lambov12

lambov12 — Tue, 10 Mar 2009 10:33:49 +0000

seems interesting ..

By: turismo

turismo — Tue, 10 Mar 2009 10:24:01 +0000

Notice there’s no throttle valve body. i don’t see direct fuel injections.

By: Littlefire

Littlefire — Tue, 10 Mar 2009 08:23:34 +0000

Fiat is a big company just like VW, Fiat own Alfa Romeo, Ferrari, Maserati and have a lot of share in some China base company, US Chrysler and if not mistaken TATA also got a bit.. Financially is consider quite strong compare to other struggling auto manufacturer..

By: MyBoy

MyBoy — Tue, 10 Mar 2009 07:46:20 +0000

This is a very good implementation of Variable Valve Timing and Lift. Will be a stopgap before we move to camless engine (when it is reliable enough).

By: awak

awak — Tue, 10 Mar 2009 07:22:55 +0000

if i can translate from what i saw from the video,
the system require normal camshaft just to give mechanical pulse to the valve reaction but on the middle of the reaction chain there is an interuption or manipulation of hydrolic pressure mechanism(reduce or increase or regulating its presure valve) which ultimately controlled the valve lift and duration.
and what the most unique about this feature is the alteration of valve DURATION which is really flexible in every manner ,even 2 event can pulsed at one time, it is a matter of reducing the hydraulic pressure in the middle of the event and close it back quickly to regain the pressure for another second lift.

so far a fine tuning of intake valve duration cant be done by other technology i think. (correct me)

this will further creating more efficient engine,

and another different compared to vvt, if vvt early opening it will have to early closing, but with this it can be late openeing but early colsing,
thats mean another parameter of engine breathing is created that will further enhanced the engine efficiency.
im not sure its capable of valvematic capability, it can act in simillar way at least if not batter, but the most important is ,its a new way of how the engine breath contributed by a more fine tune/variable of valve DURATION.

By: newbie

newbie — Tue, 10 Mar 2009 07:10:54 +0000

Hey wondering rite, is Fiat making alot of money? I thought they were in trouble or something, can still come out with something like this?

By: Kin

Kin — Tue, 10 Mar 2009 07:08:41 +0000

Whoa, brilliant idea from Fiat. Truly go green…

By: kei9

kei9 — Tue, 10 Mar 2009 07:06:18 +0000

What’s the car inside the video?

Nice innovation. KUDOS.

By: MyBoy

MyBoy — Tue, 10 Mar 2009 06:09:40 +0000

[quote comment="219191"]i sense that the day that individual valve can be controlled individually is the future .[/quote]
Fully independent system is still in testing as its not reliable enough for now.

By: lo

lo — Tue, 10 Mar 2009 05:10:06 +0000

i sense that the day that individual valve can be controlled individually is the future .

By: fastcx

fastcx — Tue, 10 Mar 2009 02:56:05 +0000

[quote comment="219102"]Toyota also has VVT-iE – http://en.wikipedia.org/wiki/VVT-iE/quote
yeah, tats their recent year’s development, but they only use hydrolic on exhaust valve, electric motor on intake, which is different from fiat’s. fiat’s still have conventional exhaust cam mechanism, but hydrolic for intake

By: Paul Tan

Paul Tan — Tue, 10 Mar 2009 02:50:43 +0000

Toyota also has VVT-iE – http://en.wikipedia.org/wiki/VVT-iE

By: fastcx

fastcx — Tue, 10 Mar 2009 02:48:46 +0000

basically its a great idea, 1 cam shaft is needed only, so conventional vvt tech can be used on exhaust cam if they want2, while intake valves r controlled by hydrolic that regulates thru the exhaust cam.

just not sure about the additional weight(after all, a cam is lighter than that mechanism) vs. improved power output justify the advancement. there r other ways to reduce emission tho, perhaps water injection + light turbo boost to achive similar result?

By: Littlefire

Littlefire — Tue, 10 Mar 2009 02:27:59 +0000

Hmm… It almost like BMW or Toyota new valvematic engine which control the intake valve by electronic.

Now it is only in intake valve, but i think it can be implemented on the exhaust valve also. By using this kind of technology, i think the engine can be tune from a economy engine into a high rev engine by just adjusting the ECU which control the valve lift! Wow.. i can see a lot of tuning opportunities from this engine..

By: CYC

CYC — Tue, 10 Mar 2009 02:06:23 +0000

Ya, i m the first one to post