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Old 02-02-2011, 12:43 PM   #1
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Engine animation..... pretty cool.

I was surfing around looking for my next mod and found some pretty cool animations on a engine and the rotating assembly, VVT, and such.

Shows how the whole intake, compression, spark, exhaust, cam, lifter, etc....... works and how VVT works too. The VVT is something I just didn't know much about. Pretty cool stuff I thought.

The first in not an LS series engine but it's a pushrod engine so same type and same process. The second is only a 4 cylinder and overhead cam, not pushrod but a good representation of intake, compression, spark, and exhaust with the valves. The VVT one is overhead cam but gives a little insight of what the cam is doing in a VVT situation.

Feel free to correct the vids if they are wrong or if you can give any insight.





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Old 02-02-2011, 12:49 PM   #2
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Interesting. My wife's Vibe has VVT. Didn't know how it worked though.
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Old 02-02-2011, 12:55 PM   #3
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Nice finds! I'll have to watch them again on a bigger screen (than my iPod) when I get home!
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Old 02-02-2011, 12:57 PM   #4
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That IS cool! Thanks!
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Old 02-02-2011, 12:58 PM   #5
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cool
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Old 02-02-2011, 01:01 PM   #6
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Now once you get your head around that, try to get it wrapped around this (with its 3 moving parts!):

http://youtu.be/6BCgl2uumlI
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Old 02-02-2011, 01:22 PM   #7
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EWE!!! IT LOOKS LIKE A STINKY WINDSOR ENGINE!!! EWE!!! lol

That's pretty cool, but it looks like they have the intake and exhaust timing backward on the V8... I must not be seeing it correctly...

Have you done a search on valve float? That's SICK!
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Old 02-02-2011, 02:37 PM   #8
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Now, speed it up so that it does that it cycles about 10 times a second, thats roughly how fast an engine will spin at idle. 6k rpm = 100 times per second.
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Originally Posted by hypurone View Post
Now once you get your head around that, try to get it wrapped around this (with its 3 moving parts!):

http://youtu.be/6BCgl2uumlI
Wankles make my head want to explode.
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Old 02-02-2011, 02:42 PM   #9
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Now, speed it up so that it does that it cycles about 10 times a second, thats roughly how fast an engine will spin at idle. 6k rpm = 100 times per second.
Wankles make my head want to explode.
That was the best animation I've seen; I still got an aneurism trying to watch and understand it.
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Old 02-02-2011, 02:44 PM   #10
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Quote:
Originally Posted by DGthe3 View Post
Now, speed it up so that it does that it cycles about 10 times a second, thats roughly how fast an engine will spin at idle. 6k rpm = 100 times per second.
Wankel's make my head want to explode.

I would still be driving my twin turbo RX7 if the Camaro wasn't reborn this way and they made better torque.... :(
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Old 02-02-2011, 02:45 PM   #11
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I would still be driving my twin turbo RX7 if the Camaro wasn't reborn this way and they made better torque.... :(
So are the rotors considered cylinders, per se?
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Old 02-02-2011, 03:00 PM   #12
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Quote:
Originally Posted by radz28 View Post
So are the rotors considered cylinders, per se?
Well, the rotor themselves would be "considered" the "pistons as it were". The housings are the combustion "chambers". And to really twist your brain, the path that the rotors travel is "epitrochoidal".
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Old 02-02-2011, 03:06 PM   #13
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Its funny how people nowadays think VVT is so new and cool. In all reality honda has been doing variable timing since the early 90s. So when I see a company talk about VVT im not impressed.
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Old 02-02-2011, 03:17 PM   #14
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Quote:
Originally Posted by radz28 View Post
So are the rotors considered cylinders, per se?
Each rotor is akin to 3 cylinders (well, pistons if you want to be picky). But since it completes the equivalent to a 4 stroke cycle (suck, squeeze, bang, blow) it will fire 3 times each cycle, which is the same as what a 6 cylinder engine does.
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Old 02-02-2011, 03:31 PM   #15
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Quote:
Originally Posted by jdenotter View Post
Its funny how people nowadays think VVT is so new and cool. In all reality honda has been doing variable timing since the early 90s. So when I see a company talk about VVT im not impressed.
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The concept of VVT dates back to steam engines, was used in aircraft in the 1920's and its been in cars for about 30 years. Honda's v-tech is a lot like Ford's Ecoboost in so much as they both have a catchy name and people forget that other manufacturers did the same thing earlier.

On a barely related tech-fascination/history note ... I find it funny when people talk about OHV engines as being old, implying that OHC is somehow new. They're both roughly a century old, with OHV being maybe a decade older than OHC.
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Old 02-02-2011, 03:39 PM   #16
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Quote:
Originally Posted by DGthe3 View Post
The concept of VVT dates back to steam engines, was used in aircraft in the 1920's and its been in cars for about 30 years. Honda's v-tech is a lot like Ford's Ecoboost in so much as they both have a catchy name and people forget that other manufacturers did the same thing earlier.

On a barely related tech-fascination/history note ... I find it funny when people talk about OHV engines as being old, implying that OHC is somehow new. They're both roughly a century old, with OHV being maybe a decade older than OHC.


And then they call the pushrod outdated.
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Old 02-02-2011, 03:42 PM   #17
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WTF

why are you posting ford motors on a camaro site?!
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Old 02-02-2011, 03:45 PM   #18
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WTF

why are you posting ford motors on a camaro site?!
I tried finding an LS3 one. There are none.

Just an illustration on how it all works.

The one illustration I think is a Honda. lol VVT.
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Old 02-02-2011, 10:31 PM   #19
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Well, the rotor themselves would be "considered" the "pistons as it were". The housings are the combustion "chambers". And to really twist your brain, the path that the rotors travel is "epitrochoidal".
WTF did you just post? LOL!!! Yeah - well - I'm a dodecahedron (HTF is that spelled?...)

Quote:
Originally Posted by DGthe3 View Post
Each rotor is akin to 3 cylinders (well, pistons if you want to be picky). But since it completes the equivalent to a 4 stroke cycle (suck, squeeze, bang, blow) it will fire 3 times each cycle, which is the same as what a 6 cylinder engine does.
Is that why, until the last RX8, those engines were considered too inefficient, then, because they are really almost three-cylinder engines per rotor? Sh*t - here comes that headache again

Quote:
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I tried finding an LS3 one. There are none.

Just an illustration on how it all works.

The one illustration I think is a Honda. lol VVT.
I really think these are great animations. I couldn't wrap my mind around how a rotary works, and I'm closer than I have ever been now, so thanks
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Old 02-02-2011, 10:47 PM   #20
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those injectors looked to be a bit early...
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Old 02-02-2011, 11:07 PM   #21
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Is that why, until the last RX8, those engines were considered too inefficient, then, because they are really almost three-cylinder engines per rotor? Sh*t - here comes that headache again
Rotors make my head spin, so I can't even begin to explain. I think its related to the valving, or maybe how the compression stroke works, or it could be something else entirely. But suffice to say, its more complicated than how a 3 sided rotor does 4 things at once.
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Old 02-03-2011, 08:09 AM   #22
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Quote:
Originally Posted by radz28 View Post
WTF did you just post? LOL!!! Yeah - well - I'm a dodecahedron (HTF is that spelled?...) Told ya!



Is that why, until the last RX8, those engines were considered too inefficient, then, because they are really almost three-cylinder engines per rotor? Sh*t - here comes that headache again No, they are not thermally efficient which is what hurts the fuel mileage. This means they tend to lose thermal expansion during the power stroke and is why there are 2 plugs per chamber (to ignite the mix about 20 degrees apart). Everyone tried to label them 6-cyl's to make them race in higher HP classes cuz they were kicking everyone's ass elsewhere... When that failed, they handicapped them with more and more weight til they couldn't compete...



I really think these are great animations. I couldn't wrap my mind around how a rotary works, and I'm closer than I have ever been now, so thanks
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Old 02-03-2011, 11:23 AM   #23
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Nice.... thanks PQ!
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Old 02-03-2011, 11:50 AM   #24
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subd so i can watch it after work.
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