ESE's works engine tuner

[JanBros]

Is it just me, or does it look like the piston is quite a long way down the barrel with no ports yet opening?

I alreay thought something was weird but couldn't lay my finger on it. guess you just did.

[husaberg]

Yep, this is the cylinder, and here is what Harry Ryger wrote:

Is it just me, or does it look like the piston is quite a long way down the barrel with no ports yet opening?

I alreay thought something was weird but couldn't lay my finger on it. guess you just did.

Look more to the left the reed entry seems pretty high................doesn't it .....lol
Attachment 312440 Attachment 312441

[breezy]

Is it just me, or does it look like the piston is quite a long way down the barrel with no ports yet opening?

maybe the combustion chamber in the head is moved up and down within the cylinder?? Has Lennart Van den Doel , had some input to this invention??

[husaberg]

Simple control of dwell and linear motion.

[Frits Overmars]

Simple control of dwell and linear motion.

Husa, I'm afraid you caught a bad case of fourstrokingitis. Get well soon.

[husaberg]

Husa, I'm afraid you caught a bad case of fourstrokingitis. Get well soon.

Yes but you have to admit that it would be kind of ironic to use their own popit wigit treachery against them to allow control of the port timing, by proxy.

I like the old steam engines too.

[senso]

It can be just as the Gas Gas EC125 cylinder/head, the combustion chamber is recessed into the cylinder some 5-6mm, so that can look like it has pretty low timmings, when its just the deck that is not really in the top of the cylinder, but a bit bellow.

[monkeyfumi]

Frits, are the new/different features of the ryger engine something that could be adapted to other existing two-stroke engines?

[peewee]

It can be just as the Gas Gas EC125 cylinder/head, the combustion chamber is recessed into the cylinder some 5-6mm, so that can look like it has pretty low timmings, when its just the deck that is not really in the top of the cylinder, but a bit bellow.

like this one ? im guessing why the rygar pics looks to have a low piston is because the cylinder bore sits down in the casting which gives the appearance of the piston sitting farther down

[pugs]

Anyway, concerning Ryger engine, I tend to believe the basic concept works like this...

Just add the cylinder reed and keep the transfer port as a additional mixture storage (& or inlet), leave the pumping/supercharging effect to that cylindrical stuff beside the reed housing, then add another mumbo jumbo details (& connectors) to make it work (stuff that I don't want to think about right now)...
As Frits said, much simpler, right?

I think, it really could take some space back from the fourstroker..
It really could just me mumbling some crap though...

[Flettner]

Anyway, concerning Ryger engine, I tend to believe the basic concept works like this...

Just add the cylinder reed and keep the transfer port as a additional mixture storage (& or inlet), leave the pumping/supercharging effect to that cylindrical stuff beside the reed housing, then add another mumbo jumbo details (& connectors) to make it work (stuff that I don't want to think about right now)...
As Frits said, much simpler, right?

I think, it really could take some space back from the fourstroker..
It really could just me mumbling some crap though...

That's interesting, what are we looking at? LPG transfer port injection?The white thing, pumping bellows?

[Flettner]

OK, I give in Frits, this game is no fun any more. Back to the open ended sliding sleeve engine I think, just need to make a piston to suit and it's almost ready for a fire up ( with standard reed sysem ).
If it makes 70HP I'll take some half assed photos, so as you can't quite see how it works

[husaberg]

OK, I give in Frits, this game is no fun any more. Back to the open ended sliding sleeve engine I think, just need to make a piston to suit and it's almost ready for a fire up ( with standard reed sysem ).
If it makes 70HP I'll take some half assed photos, so as you can't quite see how it works

Maybe if we all chip in we can pay Frits fine.........

OK assuming it is simple.
to increase the cylinder filling if the air is first compressed it takes up less space and can also enter faster.
Giving some additional time for atmospheric filling to do the rest.
I have already posted this pic.
Note how the inlet air flow is continuous, no stop start losing and gaining inertia.
this is a bigger pic only sideways

[Frits Overmars]

Anyway, concerning Ryger engine, I tend to believe the basic concept works like this...
Just add the cylinder reed and keep the transfer port as a additional mixture storage (& or inlet), leave the pumping/supercharging effect to that cylindrical stuff beside the reed housing, then add another mumbo jumbo details (& connectors) to make it work (stuff that I don't want to think about right now)... As Frits said, much simpler, right?

Your idea looks rather simple compared to some suggestions I've seen here. But your pumping cylinder is moved by crankcase pressure alone, right?
It may function at 3.000 rpm, but the Ryger revs past 30.000 if you keep your foot down (which I did the first time I gave it some throttle, because I expected 125 cc kart-like acceleration, not the rocket launch I got) .

[Frits Overmars]

Frits, are the new/different features of the ryger engine something that could be adapted to other existing two-stroke engines?

Yep.
Here are two links showing the standard VM 125-engine.

VM 125 M 02/B catalogue: http://www.vmmotor.com/www/vmmotor/f...5-m02-beng.pdf

VM homologation: http://mach1motorsport.files.wordpre...ogering-vm.pdf

I didn't count them but I estimate that in the Ryger engine 98% of these parts are used unmodified, including the cylinder head.