• May 23rd 2008 at 8:28AM
  • 4
Energtek, which we remember from their ANG (Adsorbed Natural Gas) projects, has announced that they can successfully convert a two-stroke engine to use natural gas. The converted vehicle, a Yamaha RS100T motorcycle with a locally-produced sidecar, was converted to burn natural gas by utilizing Energtek's ANG technology. The company claims that this is the first recorded success of converting a two-stroke engine for a large-scale commercial project.

Two-stroke engines are usually more polluting than four-strokes but are usually cheaper to purchase and are quite durable. Countries such as the Philippines are actually attempting to ban two-stroke engines because of pollution issues, something that natural gas conversion can ease - but natural gas-burning two-strokes still produce carbon dioxide. Full press release after the jump.

Press Release:

Energtek Completes First Successful Natural Gas Conversion of Two Stroke Engine for Commercial Use

- Thousands of Highly Polluting Two-Stroke Vehicles in the Philippines will be Similarly Converted Using Energtek's Proprietary ANG Technology

Energtek Inc. (OTCBB: EGTK), a world leader in the development of Adsorbed Natural Gas (ANG) technology, announced today that a three-wheeler with a two-stroke engine has been successfully converted to operate on Natural Gas in the Philippines. Over the next year, thousands of similar small vehicles with two-stroke engines are scheduled for identical conversions as part of Energtek's commercial project in the Philippines.

The converted vehicle, a Yamaha RS100T motorcycle with a locally produced sidecar, is now operating on Natural Gas utilizing Energtek's proprietary Adsorbed Natural Gas technology. The conversion of a two-stroke vehicle engine to Natural Gas fuel is the first recorded success of its kind for a large-scale commercial project.

"Energtek's technology provides a solution for the country's more than two million tricycle drivers to continue to operate their vehicles, preventing them from suffering a significant loss of livelihood that would have been brought on had they been forced to stop using them," said Ariel P. Lim, the Philippine President's Special Advisor for Public Transport Affairs. "We are very excited about the conversion to Natural Gas of many of the country's two-stroke engine vehicles and expect that it will drastically reduce the Philippines' high pollution levels."

Drivers have long been attracted to two-stroke vehicles due to their relatively low purchase price, but many governments, including the Philippines, are now attempting to limit or completely ban the use of two-stroke engines powered by gasoline.

"Millions of two-stroke vehicles powered by gasoline are causing severe pollution, particularly in nations where they represent a large percentage of motor vehicles," said Energtek CEO Lev Zaidenberg. "We are pleased to present the Filipino people with a practical solution to allow low-income drivers to continue operating their existing vehicles, using clean and affordable Natural Gas. Utilizing abundant Natural Gas resources provides substantial environmental benefits and reduces equivalent fuel costs by more than fifty percent."

Two-stroke engines release significantly more hazardous particulate matter than cleaner four-stroke engines. Additionally, two-stroke engines are quite durable and can last for up to 30 years, further highlighting the importance of conversion solutions in locations where citizens may not be able to afford purchasing a new vehicle.

[Source: Energtek]


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    • 1 Second Ago
  • 4 Comments
      • 7 Years Ago
      jim -

      True: I've seen direct-injection two strokes that avoid the whole problem of using the crankcase as part of the induction path.

      But this project involves retrofitting an existing engine; I presume it uses the crankcase for induction, as I've not seen a direct-injection two stroke motorcycle in production.

      Separating the induction and crankcase paths on an existing two stroke engine would involve quite a bit of work and likely cost more than the engine is worth.

      I'd like to hear more about how they approached these problems on this project.

      • 7 Years Ago
      The definition of a 2-cycle engine refers to a power stroke on each revolution. Mixing oil with the gas is simply a convenient, cheap way of lubricating these engines. There is no reason why you can't isolate lubrication from fuel, thus eliminating that source of combustion waste. The remaining waste can then be treated as it is in 4-cycle engines.

      Theoretically a 2-cycle engine is twice as powerful as a 4-cycle engine of the same displacement, potentially allowing a physically smaller and lighter engine for a given power rating. Beyond emissions issues another problem that needs to be overcome is the lack of low RPM torque provided by 2-cycle engines.
      • 7 Years Ago
      The key item missing here: How do they lubricate the engine?

      The reason normal two-strokes are so dirty is the lubricating oil that's mixed with the fuel. Natural gas burns much cleaner - but doesn't solve the lubrication problem. Sadly, the press release is silent on this topic.

      Anyone have further info?
      • 7 Years Ago
      regardless of using the crankcase in the intake cycle or not, or solving the lubrication problem, you will always have a certain amount of unburned fuel leaving through the exhaust port from the lack of an exhaust/intake stroke.
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