<< Fred Osborn wrote:
 >
 > Lynn,
 >
 > Love your rants, very educational.
 >
 > Big Snip
 >
 > "could we let go of the carburetor and try high pressure direct injection?
 > Like every damn diesel in the world. If you can't design one yourself,
 > steal
 > one off of a VW."
 >
 > I certainly know I can't design one. Do you have any recommendation as to
 > which VW system would be a good place to start stealing? I would really
 > like to try this in a single rotor test bed.
 >
 > Fred O.
 

I have seen them on running engines in the VW pickup truck. There are a lot
of things that you could have with the addition of high pressure direct
injection. John Deer built a prechamber to inject into for their diesel fueled
generator set rotary. The same could be used for a spark ingnition engine, so that
the engine would run on any flamable liquid but not require the high
compression of a diesel. Similar to the Honda 1200CC three valve. Where  a small valve
let in an over rich easy to light mixture reight beside the spark plug, to
light a very over lean mixture entering through a normal sized valve.

I have thought about this for years. There would be a loss of apex seal
lubrication if you inject very far into the compression stroke, so direct injection
of lube like the newer engines might be required. Lots of good things about
high pressure direct injection. The VW pump (Bosch) is big and very heavy. But
you only need one piece of the injection pump element. So there could be a
saving there. Also you might find a damaged pump that has enough parts to build a
single section pump.

With a single rotor, you could build a plunger holder and just run it off of
an eccentric ring right on the crank. Maybe get the whole thing inside the
front cover. Once it gets hot it would run on anything.

See the direct injection pump on this design.

Lynn E. Hanover

I can't say much for the engine design but the direct injector set up is called a 
Bosch Unit Injector. Off the shelf.  Same as used on this German Wankel GMBH engine.

Paul Lamar
 
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