My opinion of how the Dolphin pulse charge technology works was
based upon conversations with Ron Holland. You can find my analysis
in message #2213. I am flattered by the positive responses I have
received to my posts. Thank you, all my fans. Ron Holland initially
brought up the subject of pulse jet engines at the California Speedway
in February. Some facets of some pulse jet engine operations which
I have not mentioned is the fact that some of them, but not all, make
use of reed valves to control flow direction through the engine, and the fact that pulse jets make use of the recombinant energy of whatever fuel they are burning. Recombinant energy simply means
that there is sufficient time for the hydrocarbon molecules to recombine
into burnable fuel after the initial redox reaction. So far as reed valves
are concerned, BAT International states that no additional parts are
required, which would indicate to me that they don't use reed valves.
However, I have seen reed valves used on four-stroke engines to
prevent standoff of fuel air mixture in the rpm range where carburetors
and exhaust system tend to have a mismatch of resonances. A recent
photo of the modified Porsche engine in the Magnum sports car appears
to show some handmade intake runners between the cylinder heads
and the carburetors. This would indicate to me that Dolphin has been
experimenting with tuned intake lengths for the intake system. Also,
Ron Holland spoke to me about modified pistons on the Yanmar
engine. He said that the combustion chamber was within the piston
head, which is very thick. If fuel is sprayed into this very hot chamber,
better fuel evaporation will take place. Since optimum combustion is
based upon the three factors of time, temperature, and turbulence, it
would seem that an increased rate of evaporation would mean that
the amount of time for efficient combustion would be increased, and
the actual amount of fuel sprayed into the cylinder could be reduced.
In a gasoline engine, the igniting spark could be retarded as well. |
