The Bucket Foundry

[Flettner]

Yes one of my pre heat methods was to hold the Hot Air Gun at the inlet as the engine turned over but it all got too messy trying to hold everything. I've spent today sorting out parents (mine and my wifes) so nothing has been done. Although I've found some pullys, a belt and some steel channel to bolt it all to, engine and 2.2 KW motor. Perhaps this evening or tomorrow when things have settled down.

[F5 Dave]

Have you considered alchemy Neil?

I'll sponsor enough scrap metal once you get the first multitude carat result, I'm assuming Tuesday.

[ken seeber]

I'll sponsor enough scrap metal once you get the first multitude carat result, I'm assuming Tuesday.

No scrap metal here Dave, but a generous sharing from a fellow ANZACian. Had to do some welding on it and, because it looked so shitty, I thought an action pic will hide the mess. Next is the O ring grooves. Ultimately the collection will sit on some old reed valve 100 cc IAME crankcases, with a 50 bore and stroke and, not surprisingly, it will use a STRIKE piston. The goal being a carburetted 2 stroke that 2 strokes at idle.

[Niels Abildgaard]

what is a semi diesel?

Try Youtube Semi diesel

[Flettner]

Semi Diesel is not HCCI. Semi Diesel is just a glow plug engine with the hot bulb being the glow plug. I guess hot bulb is only good for low speed engines where static compression is adjusted (at the factory) to get the timing about right. And it has an actual ignition point, a bit like a spark plug.

[ken seeber]

The goal being a carburetted 2 stroke that 2 strokes at idle.

In hindsight, I thought I should explain this a bit more. Essentially this is a sliding cylinder that can be raised or lowered, thereby altering the exh and transfer timings. In this case, the head is stationary, held in place by the sturdy external water jacket, so the CR is constant. At the lowest position, the transfers will be only 3 mm above the piston at BDC, giving 84 deg transfer & 158 exh duration. When raised, the durations will be 130 and 200 respectively. The hoped for improvement in low speed “cycle to cycle” combustion variation might/will/better come about due to the late commencement in scavenge flow and its short time duration giving less opportunity for the fuel charge to be lost out the exhaust. This also being a product of its potential higher velocity forcing the charge to follow its full scavenge path.
In this case, the scavenge path is the FOS or contra axial flow arrangement.
The sliding cylinder thing came about in ESE (approx Jan 2015) when there was discussion on controlling the mass flow rate through the engine by varying the transfer port height, this possibly being the primary load controlling mechanism.
So, who knows?

[husaberg]

The goal being a carburetted 2 stroke that 2 strokes at idle.

In hindsight, I thought I should explain this a bit more. Essentially this is a sliding cylinder that can be raised or lowered, thereby altering the exh and transfer timings. In this case, the head is stationary, held in place by the sturdy external water jacket, so the CR is constant. At the lowest position, the transfers will be only 3 mm above the piston at BDC, giving 84 deg transfer & 158 exh duration. When raised, the durations will be 130 and 200 respectively. The hoped for improvement in low speed “cycle to cycle” combustion variation might/will/better come about due to the late commencement in scavenge flow and its short time duration giving less opportunity for the fuel charge to be lost out the exhaust. This also being a product of its potential higher velocity forcing the charge to follow its full scavenge path.
In this case, the scavenge path is the FOS or contra axial flow arrangement.
The sliding cylinder thing came about in ESE (approx Jan 2015) when there was discussion on controlling the mass flow rate through the engine by varying the transfer port height, this possibly being the primary load controlling mechanism.
So, who knows?[/QUOTE]

Pretty sure I was 129457% my idea (But only if it works)
I recall at the time We Kiwis offered to swap you Russell Crowe for the exclusive patent rights to it....................

In all seriousness It seems like a great solution. Better than any I could have ever came up with for throttling the transfers.... three birds one stone (and a partridge in a pear tree)
All it needs is a great silly acronym

[Yow Ling]

Pretty sure I was 129457% my idea (But only if it works)
I recall at the time We Kiwis offered to swap you Russell Crowe for the exclusive patent rights to it....................


All it needs is a great silly acronym

Controled utility numerically throttled transfers

[husaberg]

Controled utility numerically throttled transfers

I must say, it has a nice ring to it.................

[Grumph]

Adjustable ratio scavenge engine, surely ?

[Lightbulb]

[QUOTE=ken seeber;1130932968]

The goal being a carburetted 2 stroke that 2 strokes at idle.

In hindsight, I thought I should explain this a bit more. Essentially this is a sliding cylinder that can be raised or lowered, thereby altering the exh and transfer timings. In this case, the head is stationary, held in place by the sturdy external water jacket, so the CR is constant. At the lowest position, the transfers will be only 3 mm above the piston at BDC, giving 84 deg transfer & 158 exh duration. When raised, the durations will be 130 and 200 respectively. The hoped for improvement in low speed “cycle to cycle” combustion variation might/will/better come about due to the late commencement in scavenge flow and its short time duration giving less opportunity for the fuel charge to be lost out the exhaust. This also being a product of its potential higher velocity forcing the charge to follow its full scavenge path.
In this case, the scavenge path is the FOS or contra axial flow arrangement.
The sliding cylinder thing came about in ESE (approx Jan 2015) when there was discussion on controlling the mass flow rate through the engine by varying the transfer port height, this possibly being the primary load controlling mechanism.
So, who knows?

Nice work Ken, are you going to make this with variable compression as well further down the track with a inner moving chamber while keeping a constant squish clearance ?
I was looking at a transducer making a fog/mist the other day, actually for acetone, but it got me to thinking about a transducer making a fog to mix the air with the petrol. It should be able to give a much better air fuel mixing than a carburetor or fuel injection. Just not sure how it could be controlled to give the right ratio. But if HCCI works like I think it does, the lean mixture would still ignite.

[Grumph]

[QUOTE=Lightbulb;1130933055]

Nice work Ken, are you going to make this with variable compression as well further down the track with a inner moving chamber while keeping a constant squish clearance ?
I was looking at a transducer making a fog/mist the other day, actually for acetone, but it got me to thinking about a transducer making a fog to mix the air with the petrol. It should be able to give a much better air fuel mixing than a carburetor or fuel injection. Just not sure how it could be controlled to give the right ratio. But if HCCI works like I think it does, the lean mixture would still ignite.

History again - in the 50's Guzzi ran a supercharged 500 four legally. The blower merely blew air across a fuel nozzle to atomise it. No inlet pressure. Bloody complicated way of doing things. From memory I think there was an engine speed fuel pump and a rotating valve like a Hilborn to vary quantity of fuel.

[husaberg]

History again - in the 50's Guzzi ran a supercharged 500 four legally. The blower merely blew air across a fuel nozzle to atomise it. No inlet pressure. Bloody complicated way of doing things. From memory I think there was an engine speed fuel pump and a rotating valve like a Hilborn to vary quantity of fuel.

I posted pic and a diagram I think in the ESE thread. I will have a look it was from memory direct cylinder mainly air injection
http://www.kiwibiker.co.nz/forums/sh...post1130654830


To save you digging it out Grumph I can email it if you like?

[jasonu]

Controled utility numerically throttled transfers

I thought that was an acronym for Gypsies. Caravan Utilizing Nomadic Travelers...

[husaberg]

I thought that was an acronym for Gypsies. Caravan Utilizing Nomadic Travelers...

We call them Azkels but only if they have no bikes and a couple of tethered Goats.