How TiVCT works

The Fang · Jan 18, 2010

I found this vid on TiVCT and it answered my questions on how it actually works. This is interesting technology so I'd be interested in everyones opinions on it. Or not.
YouTube - car engine ford Ti-VCT 3d

SpartaPerformance · Jan 18, 2010

That was actually very interesting, I like the British accent..... lets just hope the British don't build.

YSUsteven · Jan 19, 2010

Based on how it operates, it will be of the utmost importance to keep the engine oil clean... Its one thing to lubricate the components, its another for precise valves to rotate the camshafts.

blbrchnk · Jan 22, 2010

That video was awesome. I already passed it around the office to all the car guys.

I'm an engineer, so ingenuity like that makes me want to cream in my pants.

The Fang · Jan 22, 2010

OK boys lets not get to excited.

YSUsteven, I am sure it will be imperrative for there to always be good clean oil pumping and the correct recommended grade. I can see sludge build up causen some problems but atleast the cams are on top and easier to access.

V6Vin · Jan 23, 2010

The whole thing reeks of failure. That's a lot of o-rings moving at high speed. I wonder how long they will last before you start getting oil blow-by and loose function? 50k? 75K? On the other side you have oil residue build up that could seize up the whole thing. No matter how clean you keep the oil there will still be some coating. Not to mention the solenoids. How often will these need replaced?
Built in fail, job security for Ford parts and service department.

Thanks Fang for posting this, I had been wondering about what this new system was.

blksn8k · Jan 24, 2010

Hmmm, they must not be too worried about oil cleanliness if the recommended oil change service interval is 10,000 miles. It does have an 8 qt capacity though.

The Fang · Jan 24, 2010

blksn8k said:
Hmmm, they must not be too worried about oil cleanliness if the recommended oil change service interval is 10,000 miles. It does have an 8 qt capacity though.

I think they up'd this cause they must run cooler but am very skeptical, if you use a synthetic it can be possible I guess.

ruffy · Jan 24, 2010

seems awful complicated and over engineered for a car engine. Reminds me of the flight control hydraulics on some of the aircraft I repair.

CliffyDeuce · Jan 30, 2010

BMWs have been using a system that uses engine oil to adjust the cam timing for some time now, and they only change the oil every 15k-18k miles! With folks regularly running BMWs over 150k miles, I've got to imagine this setup should also be able to work until something else on the engine breaks first.

bhuff30 · Jan 30, 2010

Interesting video, but a few comments:

One poster mentioned about a large number of O-rings - I don't see so. The plunger looks like a finely machined control valve, like what an automatic tranmission uses to for the gear selection. You move the car into drive, and that moves a control valve that looks similar to this, which puts oil pressure into certain passages. This control valve system has proven very reliable for decades already.

The main mod of failure that I can see is the solenoid which controls the control valve burning out, which shouldn't be a horribly expensive or difficult fix.

95Monky · Jan 30, 2010

I cant imagine trying to change cams in this thing

The Fang · Jan 30, 2010

bhuff30 said:
Interesting video, but a few comments:

One poster mentioned about a large number of O-rings - I don't see so. The plunger looks like a finely machined control valve, like what an automatic tranmission uses to for the gear selection. You move the car into drive, and that moves a control valve that looks similar to this, which puts oil pressure into certain passages. This control valve system has proven very reliable for decades already.

The main mod of failure that I can see is the solenoid which controls the control valve burning out, which shouldn't be a horribly expensive or difficult fix.

Yes I was`thinking the same as tranny tech too, and no orings that I see either

Mike97gt · Jan 30, 2010

CliffyDeuce said:
BMWs have been using a system that uses engine oil to adjust the cam timing for some time now, and they only change the oil every 15k-18k miles! With folks regularly running BMWs over 150k miles, I've got to imagine this setup should also be able to work until something else on the engine breaks first.

Ford has been using this type of system for a a long time time now the 4.6 3v motor uses engine oil pressure to change cam timing. they have also done this on other engines..

the 3.5 liter v6 uses a similar setup.

V6Vin · Feb 1, 2010

My bad, after closer look you are correct about the o-rings. They are only on the main body, not on the control valve. There are 4 "wiper" seals on the blades of the rotor wings though. I retract my previous statement. Perhaps this system will work, but I have to ask "why".
What are the benefits of all this ? How much HP increase does this give ? Does this increase mpg ?

bhuff30 · Feb 1, 2010

The benefit is an engine that is efficient over a wider range. That allows for more top end power without killing gas mileage and emissions.

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