Archive for the ‘engines’ Category

Fuel Efficiency

Fuel Efficient Engine Designs (Fisher Cycle)

 

An alternative to the scotch-yoke Bourke design except with simplicity and superior performance.

Fisher uses a patented yoke-arm instead.

Patent No. 7,328,682

Yoke-Arm Technology Substantially Advances Engine Performance

Fisher has developed a modern-day upgrade for piston engines which dramatically improves the performance of all conventional engines for both gasoline and diesel. This unique and cutting edge technology provides substantial increases in fuel economy, significant reductions in exhaust emissions and more power just by adding a “yoke-arm” between the piston rod and power-shaft. A simple mechanical combination, never before developed for piston engines, uses a unique linkage that connects the piston rod to the crankshaft, yet leaves the mechanical arrangement for conventional piston engines relatively unchanged.


This arrangement uses a unique yoke-arm which substantially increases piston dwell
during combustion to significantly increase combustion efficiencies. Surprisingly, this simple modification not only provides large gains in combustion efficiencies, but also greatly decreases piston rod angularity and the associated piston friction. The result is superior fuel economy, increased power and reduced emissions for both conventional crankshaft powered gasoline and diesel engines. Most all conventional engines can be accommodated such as single-cylinder, V-type, in-line, horizontally-opposed and radial with no restrictions to engine size or application.

 

References:

www.fishertechnologies.net

Patent No. 7,328,682

Bourke Engine Documentary

 

New Design for Piston Engines Greater than 100 MPG

High Fuel Efficiencies * Low Emissions * Increased Power / Weight Ratios

Yoke-Arm technology increases piston dwell during combustion for high combustion and fuel efficiencies in combination with significant power gains. All with the addition of a single component part, the yoke-arm.

New Technology for Piston Engines

High Combustion and Mechanical Efficiencies

  • Unprecedented fuel economy
  • Diesel engines especially benefit
  • Significant power increases
  • Reduced pollution
  • All piston engines benefactors
  • Only one major component required: a yoke arm

Fuel Efficient Engine Designs

Fisher Technologies has developed a modern day upgrade for piston engines which dramatically improves the performance of all conventional engines for both gasoline and diesel. This unique and cutting edge technology provides substantial increases in fuel economy, significant reductions in exhaust emissions and more power just by adding a “yoke-arm” between the piston rod and power-shaft. A simple mechanical combination, never before developed for piston engines, uses a unique linkage that connects the piston rod to the crankshaft, yet leaves the mechanical arrangement for conventional piston engines relatively unchanged.

This new arrangement uses a yoke-arm which substantially increases piston dwell during combustion to significantly increase combustion efficiencies. Surprisingly, this simple modification not only provides large gains in combustion efficiencies, but also greatly decreases piston rod angularity and the associated piston friction. The result is superior fuel economy, increased power and reduced emissions for both conventional crankshaft powered gasoline and diesel engines. Most all conventional engines can be accommodated such as single-cylinder, V-type, in-line, horizontally-opposed and radial with no restrictions to engine size or application.

The low cost and simplicity to implement the Fisher yoke-arm surprisingly translates to large performance benefits for both piston engines and compressors. As it turns out, piston driven air compressors and air conditioners also become a viable application with significant increases in mechanical efficiencies that require much less power. This new technology offers an easy approach to substantially increase engine performance and fuel economy while also reducing the engine size through increased power. Diesel engines will especially gain a large advantage because the slower burning diesel fuels derive great benefit from the added piston dwell during combustion. Such large increases in piston dwell are not possible with conventional engines or the many other experimental engine technologies you might have read about. The Fisher yoke-arm technology for piston engines has finally achieved the much needed combustion efficiencies with the necessary simplicity, low cost and superior performance that so many other attempts using mechanical arrangements have failed to do.

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Yoke Technology – Previous Attempts

There have been many previous attempts to utilize the “yoke” mechanism for piston engines. Most attempts have been met with limited success or no success at all. And all have failed to produce widespread application or develop worldwide interest. Russell Bourke’s pioneering effort to incorporate the “scotch yoke” mechanism into the engine designs of the 1940’s & 1950s has been the most successful attempt to date. Bourke deserves much credit for Fisher’s “yoke-arm” technology because the Fisher design was, in fact, inspired by Bourke’s work and his promotion of the yoke concept for piston engines.

Bourke’s R&D efforts provided Fisher a “bridge” to a superior design, which now includes additional features unknown to Bourke, and has significantly advanced engine performance beyond even what Fisher or Bourke was expecting. Many will recognize Russell Bourke, and also Collins Motor Corporation’s (CMC Power Systems), Roger Richard and others, all Bourke’s modern day protégés, as determined pioneers who made significant contributions toward the advancement of piston engines. The eventual widespread success of the Fisher yoke-arm for piston engines and air compressors will promote increased recognition and appreciation for Bourke and others in their determined pioneering efforts.

It will soon be obvious to many engine manufacturers and engine advocates that Russell Bourke and others understood the importance of continuing the evolution of technology within the Engine Industry, although Bourke could not quite bring about the final aspects of the needed breakthrough. Fisher has finally completed the equation for a superior piston engine design by discovering a new crankshaft linkage called the yoke-arm.

More about this new technology.

Fisher Technologies has developed a modern day upgrade for piston engines which dramatically improves the performance of both the gasoline and diesel engines

“Helps Promote Green Technology”

Yoke-Arm Technology – How it Works

The Fisher “Yoke-Arm” Technology for piston engines provides unprecedented advantages for both the user and manufacturer. You can see the surprising simplicity for such big time benefits with just the addition of a Yoke-Arm.

  • Substantial increases in fuel economy
  • Much lower emissions
  • Significant power increases
  • Less weight and more compact
  • Considerable increases power/weight ratios
  • Lower manufacturing costs for the same power
  • Minimal retooling required for the same power
  • Minimal retooling required for existing product lines

Yoke-Arm Advantages vs. Previous Attempts

Fisher has added a uniquely designed “yoke-arm” between the piston rod and crankshaft which is patent protected, both US & foreign (US patent no. 7,328,682). The yoke-arm is much different than previously tried yoke mechanisms such as, for example, the Bourke scotch yoke or “Bourke-Cycle” as previously discussed. The Fisher yoke-arm (shown below), an important and integral part of this breakthrough technology for piston engines, provides two main advantages over Bourke and conventional engine designs. (1) The increased piston dwell provided by Fisher is well beyond that possible with Bourke’s scotch yoke and associated “harmonic motion” for improving combustion efficiencies, and also well beyond all attempts by others. The Fisher yoke-arm can be designed for more or less dwell depending on the needs of particular applications, which is a severe constraint for the scotch yoke. (2) In addition to increased piston dwell, the added benefit of much less piston friction plus the increased mechanical advantage over conventional engines contribute to superior gains in mechanical efficiencies promoting even higher performance and added fuel economy. As it turns out, there is about a 10% mechanical advantage over the conventional engine piston rod-crank relationship.

Find Out More.

New Engine Technology

We invite everyone to read more about our engine technology and our project at Fisher Technologies.

Our New Technology for Piston Engine offers:

  • Unprecedented fuel economy
  • Diesel engines especially benefit
  • Significant power increases
  • Reduced pollution
  • All piston engines benefactors
  • Only one major component required: a yoke-arm
Yoke-Arm Technology Substantially Advances Engine Performance

Yoke-Arm Technology Substantially Advances Engine Performance

Fisher Technologies has developed a modern day technological upgrade which dramatically improves the performance of conventional piston engines for both gasoline and diesel. This unique and cutting edge technology provides substantial increases in fuel economy, significant reductions in exhaust emissions and more power all just by adding a “yoke-arm” between the piston rod and power-shaft. A simple mechanical combination, never before developed for piston engines, uses a unique linkage that connects the piston rod to the crankshaft, yet leaves the mechanical arrangement for conventional piston engines relatively unchanged.

Yoke-Arm technology increases piston dwell during combustion for high combustion and fuel efficiencies in combination with significant power gains. All with the addition of a single component part, the yoke-arm.

The results are High Fuel Efficiencies, Low Emissions, and Increased Power/Weight Ratios

Read more at fishertechnologies.net