Valve Timing catches on..

Bordom sucks, since I always seem to be vacuumed by it...

BAD AM PAM CHING....haha ha h a.....


Ok yeah that was terrible.

Valve Timing catches on..

It seems like everyone wants to market their version of a variable valve timing engine......Honda (VTEC).....Toyota (VVTL-i)....Nissan (CVTC).....even Mitsubishi (MITEC)....gotta get that timing down to a science i suppose...
Let's see if i can remember what all these stand for cuz i already did this once today...n if im wrong, please feel free to correct me..

VTEC - Variable Valve Timing and Lift Electronic Control (everyone knows that one)
VVTL-i - Variable Valve Timing and Lift with Intelligence (better know that one)
or the VVT-i - Variable Valve Timing with Intelligence
CVTC - Continuous Variable Timing Control
MIVEC - Mitsubishi Innovative Valve and Lift Electronic Control

Dude you are so bored LoL.

But yeah wasn't Honda the first to get it out there?

hell yea im bored...its 11:52pm on a sunday night...haha......but yea, honda first then Mitsu....then nissan and toyota had their's about the same time with the 350z n the is300 n all that......but disappointingly enough, toyota was last....

somebody get this kid counter strike: source on the double!

hehe me and him are bored... we were talking about it a while ago then decided to post it here cause we tried to figure out what they mean and were'nt sure. oh and uh we'll rather stick with underground 2 and the new ddr game hehe..

haha i'm gonna be an even bigger dork. MIVEC has 3 cam lobes to change between, one for low RPM, one for mid range, and one for high end, as opposed to VTEC and VVTL-i which only has 2. VVT-i is superior to most other variable systems because it can vary timing by as much as 20 degrees, and now, toyota has released duel VVT-i which uses the system on both intake and exhaust cams. The system toyota uses is most simillar to the porsche system in the amount its able to vary the timing and the fact that its able to do it on the fly, unlike some other systems which use a fixed set of gears to vary the timing. The "i" means the computer will learn things about the driver and his habits, and adjust accordingly, which makes it a superior system as well as control aspects of ignition timing and air/fuel ratios. This is the reason you can bolt on a turbo and bigger injectors and not have any prolbems driving around. you just have to drive around for about 20 min and the computer will figure everything out. neat stuff...now im gonna go play counter-strike

that will be sick as hell when that comes around...but i'd imagine it not to be nearly as reliable as a camshaft, but that would be amazing technology...limited only by the travel of the piston in the solonoid and the speed at which the piston could travel. Imagine a I6 motor with infinitly variable lift and duration, short stroke high revving, sequentional twin turbo with electroniclly controlled boost, a hybrid system simillar to IMA, direct injection, and a CVT... it would be nearly the perfect motor. if you could stay away from the throttle, the IMA would let you cruse around and save tons of fuel (no boost) and the valvetrain could just go for a little low end grunt. at WOT imagine valves with low duration and high lift along with a small turbo spooling and then as revs build: more duration, retard timing, highter boost, IMA assist, and no shifting... it would be incredible.

Wow would be the perfect word to describe that....thats pretty innovative....but i wonder how long that solenoid would last under those conditions n how long its efficiency would be....about two months ago i had to replace a solenoid, a very powerful one mind you, that we used everyday at work on a machine that controls the flow of water...we use it for about maybe a total of 2 hours a day, everyday, and the solenoid was running off of 6 car sized batteries that we would usually wear down daily n just recharge it over the course of the day....also, the solenoid was probably running at 120 clicks per minute (im saying clicks cuz thats what it does when it opens n closes the valve for the water)...thats 2 clicks per sec and im pretty sure a car is gonna be runnin a hella lot more than that....that solenoid lasted for less than a year...like 10-11 months...but, i do remember lookin at the invoice for that solenoid and it said it only cost about $26.....but then again put it in an automobile's prospective....assuming u have a 16 valve engine....thats $416....and thats assuming that it lasted one year long like the one i replaced...dayum...lets hope that these solenoids for cars lasts very long...

MIVEC could be cool....but of course they dont tune it right and it ends up sucking. that ralliart lancer has a MIVEC motor...but its like 2.XL and makes 160 hp...gimme a break. if honda did that, it would make 200+ hp and have a torque curve as flat as florida. if toyota did it, it would make 180hp and earn PZEV for clendliness.

Well IMO, the MIVEC isnt all that great cuz of that MD (modulated-displacement) mode.....cuz at low rpms, it only uses two freakin pistons to move your car cuz the lever connecting the high and low rockers in cylinders 1 and 4 disengage, closing the valves completely......thats just plain gay tho, not only did you have a four banger engine, but that MD mode turns it into a TWO banger engine....what kinda pride can you have with that....this is just a guess, but this could be why so many early model eclipses kept on breakin down so quick....like just about everyone i knew with an earlier model eclipse had engine trouble with it....I mean SURE, Mitsu claims that this MD mode would perform with 61 mpg.....IF......the driver were only driving no faster than 37 mph....unless you live in New York City n drive only in rush hour....then MAYBE that would be good but what about the other people that actually drive their car.....say.....on the highway!....wonder what the highway mpg rating is....

I was reading that they are currently experimenting with using soloniods to control the valves instead of camshafts. Once they have it down, valve timing, lift, and duration will be infinitely adjustable for maximum power across the engine rpm range.

WOW!

Actually, Toyota had VVT (precursor to VVT-i) well before the IS300 had it over here, i believe it started in the early 90s, not long after VTEC came out, and definitely before Nissan was mass producing it...

dont forget BMW's infinitely variable VANOS