Water Sparkplug

[gotoluc]

I've been looking for a small inexpensive 4 stroke engine to do some hho and hho/water mist experiments. I picked up a 26cc 4 stroke trimmer at Lowes for $149.00. Small and cheap enough not to be too worried about trashing it. I haven't gotten it fully dissambled yet, but it shouldn't be too difficult to mount a sensor on the shaft. It has overhead cams that are easy to access also. 16" 26 CC Gas String Trimmer

Dave

Hi Ursine,

great find there 26cc, 4 stroke and overhead cam on top of that. I might have to get one if my test are successful on the old lawn mower engine I have. The overhead cam pulley will give you a perfect location for timing eliminating waste spark.

Thanks for sharing

ADDED: I don't think it is overhead cam check manual: http://www.dixiesales.com/ipl/339/tb415cs_10_2005.pdf
It has valve rocker arms which have push rods, so the cam is in the crank case. However it is an over head valve engine.

Luc

[Aaron]

cheap motors

If you want cheap generators, lawnmowers, etc.. from used to brand new...check craigslist classifieds: jobs, housing, personals, for sale, services, community, events, forums for your city's listing. I have found quite a few. There are many running lawnmowers for under $50 and quite a few generators in all price ranges and plenty below $150.

[Ursine]

Hi Ursine,

great find there 26cc, 4 stroke and overhead cam on top of that. I might have to get one if my test are successful on the old lawn mower engine I have. The overhead cam pulley will give you a perfect location for timing eliminating waste spark.

Thanks for sharing

ADDED: I don't think it is overhead cam check manual: http://www.dixiesales.com/ipl/339/tb415cs_10_2005.pdf
It has valve rocker arms which have push rods, so the cam is in the crank case. However it is an over head valve engine.

Luc

You're right...my mistake.

Dave

[gmeast]

new video of triacs an rotary reed actuation

Excellent demo Greg I really like simple but effective circuits. You are ready to apply this to a lawn mower engine.

Excellent work, design and video.

Luc

Hi Luc,

Thanks but this circuit is basically your original circuit that Peter Lindemann did over as an isolated configuration. This just has solid state power switching but is fundamentally the same isolation model. This thing only uses 12 watts at 20 Hz. Most of this low consumption is because of the dedicated charging cycle. There is virtually no heat build up now anywhere and this means it's safe to bump the voltage up a little to achieve stability under the pressure of compression that will be realized in an engine.

The new video is at:

YouTube - Triacs driven by rotary actuated reed switches

Peace,

Greg

[gotoluc]

Hi Luc,

Thanks but this circuit is basically your original circuit that Peter Lindemann did over as an isolated configuration. This just has solid state power switching but is fundamentally the same isolation model. This thing only uses 12 watts at 20 Hz. Most of this low consumption is because of the dedicated charging cycle. There is virtually no heat build up now anywhere and this means it's safe to bump the voltage up a little to achieve stability under the pressure of compression that will be realized in an engine.

The new video is at:

YouTube - Triacs driven by rotary actuated reed switches

Peace,

Greg

Once again Greg most excellent

I just love the group work and great ideas we are all sharing. I say this is the number one alternative Energy research group and site on the internet at this time.

A big to everyone's participation to date

May we all succeed and find and

Luc

[gmeast]

thanks!

Once again Greg most excellent

I just love the group work and great ideas we are all sharing. I say this is the number one alternative Energy research group and site on the internet at this time.

A big to everyone's participation to date

May we all succeed and find and

Luc

Luc,

How's the 1/2 GEET comming?

Greg

[gmeast]

Hi Greg,
In theory the waste spark should not occur before the intake valve opening, practically it happens because there's advance in the timing. As we know, with water as fuel we need to retard the spark event, so it should work after timing mod.

Take care.

Hi Gibs,

I have scoured the archives (but I'm not the most proficient reader anyway) for the actual reason ?why? the need to retard the spark event. If so by how much? I know there is NOT any good thermodynamic reason to do this. In any heat engine you always want to mechanically extract the greatest potential from the high pressure gas from combustion by expanding it fully from its smallest or starting volume to its largest, final and fully expanded volume. Only then can you experience the greatest delta t and delta p ... (t1 - t2)/t1 and (p1-p2)/p1 being the fundamental expressions for thermal efficiency of systems like heat engines (t1 & p1 being the beginning temp. and press & t2 and p2 being the ending ones, respectively). (adiabatic).

Maybe "retarded" really means just a "little retarded"?

Thanks in advance. I love this forum! Peace,

Greg

[Kinetix]

Hi everyone.
I'm glad to see that we make small but determined steps to apply the plasma generators in engines. That's fine. It makes the research more meaningful for everyday life.

Now I would need a little bit of your help.
After I have tested the CDI-plasma ignition, mounted it in a nice case, I was planning to mount it in my car. Made a final test and... MOSFET burned... again... Since my setup has burned 4 MOSFET's, I have decided to use a SCR instead. I have an TIC126M and I would like to use it in the place of the MOSFET.
In the schematic posted below, would somebody help me to calculate the values of the R2, R3, etc, considering the data in the datasheet?
If we make it work with the SCR, everybody gets a big pizzaaa!!!
Thank you very much!

[goldenequity]

Hi Gibs,

I have scoured the archives (but I'm not the most proficient reader anyway) for the actual reason ?why? the need to retard the spark event. If so by how much? I know there is NOT any good thermodynamic reason to do this. In any heat engine you always want to mechanically extract the greatest potential from the high pressure gas from combustion by expanding it fully from its smallest or starting volume to its largest, final and fully expanded volume. Only then can you experience the greatest delta t and delta p ... (t1 - t2)/t1 and (p1-p2)/p1 being the fundamental expressions for thermal efficiency of systems like heat engines (t1 & p1 being the beginning temp. and press & t2 and p2 being the ending ones, respectively). (adiabatic).

Maybe "retarded" really means just a "little retarded"?

Thanks in advance. I love this forum! Peace,

Greg

Hi Greg..

The advantage/necessity of retarding the timing would be because of the speed of the plasma event exploding water.... it 's extremely fast... likely supersonic. You are trying to keep that event from occurring and pushing DOWN on a piston that's trying to come UP (compression stroke). We must move the event into the power stroke to take full advantage of it.
I love this forum and it's too!
cheers.

[CPU3rother]

Cap discharge.

Hey, everyone. Great work.

I first replicated this event back in the beginning of Aug. Yesterday I was able to produce this effect without Capacitor discharge. I did have a cap after my bridge and I partially charged it. But rather than discharging it I left it charged and disconnected on the + input side. Then I put my + from bridge to + on coil and split to diodes to plug. I monitored my cap and as you would think with one side not connected it didn’t discharge. But the event still happens. It misfired more often but still had water explosion. It would not work with the cap removed altogether or if the cap was not charged. Can someone please try this and put a scope on the cap. I have done this but would like to know if someone else gets any interesting results.

[gmeast]

Hi everyone.
I'm glad to see that we make small but determined steps to apply the plasma generators in engines. That's fine. It makes the research more meaningful for everyday life.

Now I would need a little bit of your help.
After I have tested the CDI-plasma ignition, mounted it in a nice case, I was planning to mount it in my car. Made a final test and... MOSFET burned... again... Since my setup has burned 4 MOSFET's, I have decided to use a SCR instead. I have an TIC126M and I would like to use it in the place of the MOSFET.
In the schematic posted below, would somebody help me to calculate the values of the R2, R3, etc, considering the data in the datasheet?
If we make it work with the SCR, everybody gets a big pizzaaa!!!
Thank you very much!

Hi Kinetix,

It looks to me that you have no current limiting into the circuit and that when the SCR fires, it is tying the oscillator to ground through the primary which is a very low resistance. Most have used a light bulb right after the bridge into the circuit to limit the current . You need something in a full loss system like this. I could be mistaken.

Good luck,

Greg

[gmeast]

clarity

Hi Greg..

The advantage/necessity of retarding the timing would be because of the speed of the plasma event exploding water.... it 's extremely fast... likely supersonic. You are trying to keep that event from occurring and pushing DOWN on a piston that's trying to come UP (compression stroke). We must move the event into the power stroke to take full advantage of it.
I love this forum and it's too!
cheers.

OK. Thanks. so it is "retarding it a little bit" not a lot. PHEW I was getting worried there.

Greg

[Kinetix]

Hi Greg.
Yes, it's a nice observation regarding that circuit. But that is only the second part of the schematic. My oscilator is being stopped while the discharge take place, so I don't need the bulbs. It's a Schmitt trigger there that does it. The whole schematic is posted a few pages back.
Greetings from Romania to all!

[gotoluc]

Luc,

How's the 1/2 GEET comming?

Greg

Hi Greg,

below is what I posted yesterday at Overunity Forum about the half GEET, thanks for your interest and asking.

Luc

Hi everyone,

I want to give you all an update on my engine test . I spent all day yesterday working on the waste spark circuit idea I had using a latching relay as a spark skip circuit. I originally thought the latching relay would work with a single pulse to flip (latch) the relay from side to side, well it does! but the polarity of the switch needs to reverse back and forth also. That is the problem since I'm using a single switch to activate it. All my attempts to resolve this have lead to the relay to loop and not just a single flip. So that idea looks like it's not going to work.

About 2 weeks ago my friend Rick suggested a 2:1 timing belt and pulley arrangement to which I really liked the idea but when I found out the cost (about $100.) to get the parts locally I dropped that ideal until I have a proven system.

Anyways, I think I can do a basic test without the waste spark circuit as long as I don't pass TDC since the intake valve starts to opens just a hair after TDC .

I built a really nice sliding timing position switch that I can move on the fly from about 30 degrees BTDC to 5 degrees ATDC.

Unfortunately today is raining and showing no signs of clearing and Sunday I have something happening all day, so it looks now like it's going to be Monday

Stay tuned!

Luc

[gotoluc]

Hi everyone.
I'm glad to see that we make small but determined steps to apply the plasma generators in engines. That's fine. It makes the research more meaningful for everyday life.

Now I would need a little bit of your help.
After I have tested the CDI-plasma ignition, mounted it in a nice case, I was planning to mount it in my car. Made a final test and... MOSFET burned... again... Since my setup has burned 4 MOSFET's, I have decided to use a SCR instead. I have an TIC126M and I would like to use it in the place of the MOSFET.
In the schematic posted below, would somebody help me to calculate the values of the R2, R3, etc, considering the data in the datasheet?
If we make it work with the SCR, everybody gets a big pizzaaa!!!
Thank you very much!

Hi Kinetix,

that is one slick ignition module you got there

You are all doing great stuff

Luc