New
Design for Fuel Efficient Piston Engines |
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The
Yoke-Arm Technology innovation should
easily capture the imagination of the
public, similar to the hybrid auto but
at a much lower price, and will even contribute
to the hybrid’s effectiveness by
providing a smaller, weight-reduced piston
engine with the same power having a much
greater fuel efficiency and lower emissions.
Public readiness for beneficial changes
and the awareness of environmental issues
have never been greater. This new Technology
incorporates an innovative linkage by
adding a yoke-arm between the existing
piston connecting rod and crankshaft to
improve the performance of all reciprocating
engines. The added piston dwell during
combustion, made possible by the yoke-arm,
provides considerably more efficient combustion
and significantly more power. Also, the
piston connecting rod alignment is now
maintained in a path closer to the axis
of the cylinder for much less rod angularity
which significantly reduces piston and
ring friction to promote added mechanical
efficiencies. Further, the increased mechanical
advantage of the yoke-arm vs. conventional
provides even more additional power. These improvements
result in considerably
more power, substantial fuel economies,
reduced emissions by incorporating
a simple modification for the crankshaft/piston
rod assembly.
So, the above benefits of increased power,
substantial increases in fuel economy
and reduced emissions can be accomplished with only the addition of
a single component part, a yoke-arm. The
illustrative diagram below shows just
how the addition of a yoke-arm, with the
proper mounting structure, can offer big
time benefits with minimal changes to
existing product lines. Current prototype
development has solved the major technical
issues regarding yoke-arm design and reliability.
Previous perceived Yoke track-roller and bearing wear issues
are non existent largely due to modern day advances
in roller bearing technology. Fisher's
yoke-arm does not use the "slider
bearing" arrangement common today
for many modern day scotch yoke designs.
Fisher uses a track-roller bearing arrangement
incorporating modern day materials that have not
often been available until the last decade or so.
With power to weight ratios substantially
increased compared to conventional engines,
production costs for the yoke-arm engine
for the same power should be much less.
Also, with the added performance and fuel
economy benefits wanted by everyone, profitability
should not be a concern for an improved vehicle
which everyone might be willing to pay
more.
Sales should not be an issue for a product
people want that has superior fuel advantages,
greater power for the same displacement
and much lower emissions at the same or
lower price. Product line implementation
should be relatively easy since prototype
development has now solved most of the
anticipated problems normally associated
with developmental longevity and reliability
design issues.

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