what is "strato charged"

[Freakingstang]

does this mean jonsereds version will be called turbo charged?

 

[PES+]

They already used Turbo and Turbo clean......Clean turbo maybe?

 

[PES+]

This was posted by lake in a previous thread this is the new technology that STIHL is using and I have just seen material for i think it was echo having a similar design

Can you point out to me the stratification in that explanation? The "layer"?

 

[Freakingstang]

They already used Turbo and Turbo clean......Clean turbo maybe?

no....turbo charged sounds like a better marketing ploy.....

 

[PES+]

They already clamed that

The first Jonsered "Turbo" models claimed they were running 2 to 3 pounds of boost into the sealed air filter chamber

 

[Toyjunkie]

They are also claiming better fuel economy with it. So you can cut more for less

So cleaner running for less!! Now you can hug that tree while you are cutting it down! :greenchainsaw:

 

[icelation8]

If you look up Stratified on Dictionary.com it explains to place in layers. I just said that to try and make it easier to understand.

 

[PES+]

Show me any layering going on in that Stihl white page......

What they are doing is more like the compression wave not strato charging

I don't care really......they can call it whatever they want but it is calling an apple an orange

 

[icelation8]

It doesn't say layer in the text but if you look at the picture it shows that fresh air enters through the cut outs in the piston into the trasnfer ports on top of the air fuel mix in the bottom of the crankcase creating a "layer" and because the air is on top (lol on top) it enters the combustion chamber before the air fuel and pushes out the exhaust and then you are left with very little fuel exiting the exhaust as the piston comes up and closes the exhaust port.

But because the text doesn't say layer I guess i am wrong on this one.
Thats to bad.

 

[Lakeside53]

I always assumed that they called it stratified because of the layer of air in front of the layer of fuel air.

Ian

your assumption is correct.

 

[Lakeside53]

Can you point out to me the stratification in that explanation? The "layer"?

I'll try to get someone to post the color infrared photos of the inside of a 441 cylinder during actual operation.. I have them, but they are not mine to publish (what is..?)..

 

[Simonizer]

i keep on hearing about strato charged engines like in the 441. what defines a strato charged engine?

It means it's a 2-stroke being forced to eat something it doesn't want to, in the name of the environment. A glass of water with every bite of your cheeseburger anyone?

 

[PES+]

Where is the "layer" Andy?

 

[Tzed250]

Here is a video of the concept:

http://www.stihl.de/knowhow/produkttechnik/technik_im_detail/triebwerk/popup_2_mix_isdn.htm

 

[PES+]

Maybe you can point out the "layer" in that animation? I am not seeing it

 

[PES+]

OK...A much simpler question......do the air transfer ports open before the fuel air mix tranfers? That is indeed the way that Stihls explanation reads

 

[icelation8]

Well if you look Blue( the color of the sky) is air and green(the color of grass) is your air/ fuel mix. Now you have to look really close (Zoom in) at the animation but the air enters the same transfer ports that the air/fuel mix does the difference is the clean air (blue like the sky) stacks up or layers on top of the green (like grass) air/fuel mix. Thus instead of using your air/fuel mix (Green like the grass) to scavange off the exhaust instead you use the fuel free air (Blue like the sky) to push it out the exhaust.

I don't think it can be explained any clearer.

 

[PES+]

So you are saying that there are only the 4 transfer ports,one intake and one exhaust in the cylinder.

IE there are no separate air only ports
.

Or am I still misunderstanding?

 

[PES+]

Like I said before....I have now read Stihl's description up, down, sideways, backwards and in three different languages and there is NO mention of stratification in the process......on the contrary they mention mixing of the remaining fresh air charge with the incoming fuel/air mix from the transfers

 

[PES+]

I'll but this one

It's just like strato charged....only different......but we'll call it that

strat·i·fy (strt-f)
v. strat·i·fied, strat·i·fy·ing, strat·i·fies
v.tr.
1. To form, arrange, or deposit in layers.
2. To preserve (seeds) by placing them between layers of moist sand or similar material.
3.
a. To arrange or separate into castes, classes, or social levels.
b. To separate into a sequence of graded status levels.
v.intr.
1. To become layered; form strata.
2. To develop different levels of caste, class, privilege, or status.