[Gasification] Producer Gas Engine Paper
Ken Boak
ken.boak at gmail.com
Fri Jul 1 07:19:31 CDT 2011
Hi Rolf,
The Listeroid at APL is a JKSon Indian copy which is an Indirect Injection
with the original Lister type pre-chamber head and a flat topped piston.
I have not tinkered with the pre-chamber form, other than adding a
spark-plug into the cast iron plug, where the compression change-over valve
would have fitted.
I was thinking of having some sort of arrangement like in a model
compression ignition aero-engine, where the compression ratio could be
varied with some sort of a movable "contra-piston" - but my machining skills
are not up to producing such a component.
I hope to make significant advances with woodgas trials on my Lister this
summer.
Ken
On 1 July 2011 13:05, Rolf Uhle <energiesnaturals at gmx.de> wrote:
> Hello Ken,
>
> it all relates to many factors, piston speed, head cavern design,piston
> surface temp,timing of course,all versus flame propagation speed.
> A small "normal" 1500/1800 or even 3000/3600 engine can very well have
> slower
> piston speeds than a big oldfashioned longstroke engine.
>
> By the way, have you ever tinkered with the prechamber form in your Lister?
>
> Is Jim' s Listeroid DI ? Can' t ask him myself 'cause he doesn' t answer me
> any more.
>
> salut
>
> Rolf
>
>
>
> Am Freitag, 1. Juli 2011 13:29:21 schrieb Ken Boak:
> > This is an interesting discussion, which tends to make me believe that
> the
> > future of woodgas, will be ignited with the use of conventional diesel
> > engines, modified for spark ignition, rather than the initially more
> > obvious choice of a gasoline engine.
> >
> > If, as suggested that woodgas can be used without knock problems in a
> stock
> > diesel engine at a compression ratio of 17:1, then this better than
> > compensates for the loss of efficiency when used in a gasoline engine.
> >
> > As an enthusiastic user of the slow speed Lister type diesel engines, I
> > hope to be commencing some power tests on woodgas later this year. It
> > will be interesting to see how woodgas performs at the much slower 600
> > rpm of the Lister, compared to the more normal 1500/1800rpm of a direct
> > drive diesel generator. The Lister being an old design with a
> relatively
> > long stroke of 5.5" has a mean piston speed of about 10 feet per
> second
> > - how this relates to a modern, "squarer" higher rpm engine I would
> need
> > to
> > investigate.
> >
> >
> >
> > Ken
> >
>
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