9 replies to this topic

[AVM1]

Hello fellow wood gas enthusiasts.  I am planning on supplying GEK wood gas to a 2-17 GenSet and am looking for anyone who has some experience with this engine.  It is a 2 stroke desiel with a blower and has been produced since 1938.  Anyone out there can help?  Thanks

[fuel spiller]

Are you adding spark or keeping some diesel?
My neighbor has one of those and is thinking the same (adding wood gas to the diesel idle first).
I may try this with a 6.9L ford (intl.) diesel /non turbo.

[AVM1]

fuel spiller, on 07 March 2012 - 09:46 PM, said:

Are you adding spark or keeping some diesel?
My neighbor has one of those and is thinking the same (adding wood gas to the diesel idle first).
I may try this with a 6.9L ford (intl.) diesel /non turbo.

I have spent the last couple of days considering the problem.  The blogs say it can be done but I have not found anyone who has actually done it.  I think for starters I will use diesel fuel to provide the spark and be happy with a 80-90% contribution from the wood gas.  The 2-71 should run off the GEK 4" flue system....but no one has stepped forward with any real experience,  The GEK sight is where I learned about the 2-71 and I love this engine and generator for lots of different reasons.  I am currently drawing the version 4 GEK plans for the laser cutter ... no one has any complete plans either!

[fuel spiller]

Well I guess someone has to be the first to " jump in the water".
I keep thinking of a way to use the injector lines as a "pressure switch trigger" that would discharge a spark at the right moment.

[AVM1]

fuel spiller, on 08 March 2012 - 04:28 PM, said:

Well I guess someone has to be the first to " jump in the water".
I keep thinking of a way to use the injector lines as a "pressure switch trigger" that would discharge a spark at the right moment.

According to the blogs, the injectors work off a cam to develop fuel pressure.  The engine schematic from the factory offers little insight.  The generator supplier did not answer my e-mail but the injector is representin the manuel  as a complicated piece .  I have machine equipment to fabricate the adapters so I am not concerned with the conversion if there is room.   Until I have the motor in the shop I will continue to study the 2-71 genset while I build a GEK kit from scratch.

[pgt7787]

Am I missing something? Surely a 2 stroke uses the inlet stream to purge out the spent fuel: so with a premixed gas you are purging with mixed air/gas???

[fuel spiller]

The next air/ gas mixture pulled in is the next mix to fire.

[pgt7787]

.... yes but a very substantial portion goes right through before the valve closes, to ensure all exhaust gases are cleared out.

With air this is fine: with premixed fuel you are pushing unburnt mixture into the exhaust system. Bad for fuel economy - and scary on safety grounds.

[AVM1]

I am looking at my 2-71 two stroke Detroit Diesel engine which uses the blower to purge the cylinder after the power stroke.  Pushing wood gas through the blower will result in unburned wood gas being pushed into the exhaust system.   This unburned gas in the exhaust pipes presents a problem.   A water cooled exhaust manifold with a vacum system has been considered but for now the idea of a wood gas powered 2-71 two stroke has been abandoned.

[fpgooerr]

sounds very interesting.  we'd love to help with your project in cambodia.

can you confirm which version of the gek you are trying to make?  we may have more recent cad file versions in house you can build from if you are cnc cutting the pieces.  we have yet to get these into a form to teach others the same with raw manual fabrication, but if you are cncing you can use more recent versions than i have up on the site.

we are soon starting a full build from scratch so we can get new pictures of the process from beginning to end.  we're behind on these DIY materials given the push this last year over the power pallet dev and building.  we'll catch up soon on the diy materials.  the core gasifier of the power pallet remains the same gek you can build yourself from the plans.  





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