ESE's works engine tuner

[SwePatrick]

I´m still having big problems understanding how pumpvolume in that ryger('crankhouse pump') is going to have enough displacement to fill 124cc to above 100% VE as the exhaust wasn´t important anymore.

If the 'rod' has the same volume as an std twostroke connectionrod it might get close to the same pumpeffect(without pipe).
But now the rod seems to be about 20-30mm in diam(guessing low,, it might be up against 40mm also)
if having at 25mm rod it steals about 26.5cc in crankhouse pump displacement leaving only 98cc pump to fill 124cc cylinder.

And it seems like there is a 'buffervolume' in the lower part of the transfers, this still cannot be used if pipe isn´t important.

I would say the pipe is VERY VERY important to make use of that buffervolume.
It would also be one hell of an efficiant pipe as it is a quite small volume, the vaccum increases rapidly if no possibility to pull air though the carb.

Rgds

[katinas]

Very interesting and good work! Looking forward to your pictures.
I have missed out the Ryger patent application from 08-02-17 with the number EP3128149 (A1). You can find it on google patents and some info at "https://register.epo.org/application?number=EP15179826&lng=en&tab=doclist".

It is an application, and not yet a granted patent, but I guess it is just a matter of time.
But, as always, the concept needs to meet the technical requirements and we have not yet received the full information on this. I am looking forward to the final confirmation of, not at least, the durability aspects.

Thank you.

Second rygerised piston/cylinder type with Cr 125 barrel ( Honda CR 125 1983- 1986 and Honda NS 250/400 cylinders identical on crankcase) made like Ryger, with squash under piston and small cylinder top surface - 0,7 mm. But the power feels even lower than with previous seized type. I thought that when piston began moves up after BDC some vacuum in squash slowing down the piston. And then I made mistake, just eliminating squash (cut from piston). It feels little better on power, but now i think because weaker stream and filling works better with higher compression. Now, again I need made third new piston with bottom squash for much lower compression head.

[katinas]

I´m still having big problems understanding how pumpvolume in that ryger('crankhouse pump') is going to have enough displacement to fill 124cc to above 100% VE as the exhaust wasn´t important anymore.

If the 'rod' has the same volume as an std twostroke connectionrod it might get close to the same pumpeffect(without pipe).
But now the rod seems to be about 20-30mm in diam(guessing low,, it might be up against 40mm also)
if having at 25mm rod it steals about 26.5cc in crankhouse pump displacement leaving only 98cc pump to fill 124cc cylinder.

And it seems like there is a 'buffervolume' in the lower part of the transfers, this still cannot be used if pipe isn´t important.

I would say the pipe is VERY VERY important to make use of that buffervolume.
It would also be one hell of an efficiant pipe as it is a quite small volume, the vaccum increases rapidly if no possibility to pull air though the carb.

Rgds

This is just principal schematic.
With pipe when piston moves up , transfer windows open to under piston space and suction begun directly from carb, through big boysen type and transfer ports.
And that inertial stream at hight rpm become "one directional" and help when pipe is on and suck fresh mix directly from carb.
Very interesting once test my rygerised NS without pipe and it revs like with pipe, very different to conventional engine without pipe.

[SwePatrick]

Yes, it starts draw through carb when piston is moving upwards, i´m clear on that.
But pipe wasn´t important ryger stated.

I call b***s**t on that statement(from ryger), pipe still needs to be tuned

Somehow IF this is the 'function', maybe the blowpulse into cylinder becomes so hard(due to high pressure in transfers) it creates a lowpressurepulse immediatly behind the highpressurepulse, like lowpressure behind a car traveling through air.
And by that accelerates the pulsesignal to the carb in an early phase before pipe pulls hard.
And thereby never lets the movement energy in incoming stream go down so low in amplitude.

[ranasada]

Regarding the bore clearance when running different egt levels Philou.
There is a finite amount of energy in each combustion cycle, and the combination of static + dynamic compression + the ignition timing affects
the distribution of that energy.
Some goes into the water, some into the combustion process that heats the gas that then expands and pushes down the piston.

With high compression and or lots of advance - or both, a larger amount of this heat energy is transferred to the water , or is consumed very early in the combustion cycle thus when the Exhaust opens
there is less temp ( and by inference - energy ) dumped into the Ex port,then to the pipe.
With low com,or retarded ignition, there is still alot of energy available late in the combustion process as the piston cycles downward, that then can be used in the pipe.

The amount of heat energy transferred into the piston does not vary a huge amount, except when " normal " combustion is replaced by say ,detonation.
When this happens a vast amount of the available energy is used to create free radicals,that then initiate " knock " and we see the egt drop instantly when this occurs.
This energy distribution within a normal cycle is a completely different scenario to simply " running lean ".
Then of course the piston gets overheated,and it seizes in protest.
So in answer to the question, bore clearance isnt an issue even at 700*C as long as we have a "normal combustion " process occurring.

so is better high diagram (low compression crankcase) and high ignition or low diagrams (high compression crankcrase) and retarded ignition?

[SwePatrick]

I say it´s better with a bit higher compression and getting exhaustheat with racefuel

[breezy]

This is just principal schematic.
With pipe when piston moves up , transfer windows open to under piston space and suction begun directly from carb, through big boysen type and transfer ports.
And that inertial stream at hight rpm become "one directional" and help when pipe is on and suck fresh mix directly from carb.
Very interesting once test my rygerised NS without pipe and it revs like with pipe, very different to conventional engine without pipe.

,
Katinas, are you regulating the pressure in the crankcase or are you just venting it out to the atmosphere? i only ask as it states in the patent, increase of rpm by regulating the crankcase pressure either manually or automatically page 4/16 0042 of recent patent.( i did pose this question earlier but i think that the legal contract Frits is held under probably would not allow him to comment in any way on this .)

[breezy]

hi Luc,,,

[peewee]

why doesnt somebody buy a ryger and we can see the mystery how it work with no more guessing

something else i thought of a long time. if ryger work very well then why really nobody else is trying the same concept ?

[katinas]

,
Katinas, are you regulating the pressure in the crankcase or are you just venting it out to the atmosphere? i only ask as it states in the patent, increase of rpm by regulating the crankcase pressure either manually or automatically page 4/16 0042 of recent patent.( i did pose this question earlier but i think that the legal contract Frits is held under probably would not allow him to comment in any way on this .)

Posted sketch long time ago, on down stroke air out through reed valve and then only vacuum.

add some video https://www.youtube.com/watch?v=zZWVO1tDCtg

[marsheng]

A bit of 2 stroke history.

KR3 Proton.

https://www.youtube.com/watch?v=fYqhje4lvaY

Please excuse the accent. Do I sound that bad ??

Cheers Wallace.

[wobbly]

The tune of an engine is entirely dependent upon the fuel, and they are complete opposites.
Leaded racegas loves compression ( because you can ) and can be run very lean and retarded to get heat into the pipe.
Unleaded ( low octane by definition ) hates compression, loves advance and makes better power when run on the rich side.
One is not " better " than the other, just requiring a different approach to get the best result from the fuel energy available.

[Lightbulb]

I noticed a lot of back pulses through the carb at the lower rev range and vanished when it really came on.
It there any way to reduce these pulses ?
Compared to a standard engine, have you noticed any gains in the work you have been doing?
Neil

[Lightbulb]

HCCI or a derivative of it is the future of combustion. What style of combustion chamber shapes are being developed to take advantage of this new ideas.
Neil

[Martin1981]

if ryger work very well then why really nobody else is trying the same concept ?

maybe because it is NOT working very well?