CNG
New Engine or Convert?   

The problem of air pollution around the globe is real and serious. Diesel exhaust emissions are a major source of pollution in most urban centers around the world and a major contributor to Global Warming.  Trucks, buses, generators and ships burn millions of gallons of diesel fuel daily. Many countries are looking to alternative fuels to reduce diesel exhaust emissions, especially in urban centers. Furthermore, as the price of crude oil continues to increase, the use of alternative fuels becomes increasingly economical.

Compressed natural gas (CNG) has emerged as a perfect solution to the problems of high oil prices and high exhaust emissions.  Readily available in many countries from indigenous sources, it is inexpensive and clean burning. In some countries, the price of CNG is 1/3^rd the price of diesel fuel.

Some countries have large reserves of natural gas but no technology to use it in engines. The conversion of diesel engines to natural gas would decrease the country’s dependency on foreign fuel and help them utilize the abundant natural gas resources.

Omnitek approaches the issue of 1.) replacing or 2.) converting high-polluting diesel engines to clean burning natural gas engines by offering two main options, which in large part are dictated by the level of technological capabilities within the country and financial feasibility. Omnitek may work with local companies in an effort to convert high polluting diesel engines to clean burning natural gas, or supply new dedicated Natural gas engines. However, to correctly convert a diesel engine to a low-polluting Natural Gas engine can be technologically challenging and time consuming.

      -- Under Solution 1 Omnitek will supply complete low-polluting natural gas engines in 4 and 6 cylinder configurations. This may be the better option when the existing engines are based on old and outdated technology and when long downtimes are not acceptable. Omnitek will help in the installation and service support. A strong local support team, service provider and spare parts supplier is needed. Engines can also be supplied to local natural gas truck and bus manufacturers. The engines can be certified up to the EURO 6 / US2010 emissions standard.

      -- Under Solution 2 Omnitek will supply engineering support, for a small per-vehicle royalty, to convert/rebuild the engines to natural gas locally to Omnitek specifications, on a "Technology Transfer" basis. This offers an economic benefit and boost to the local economy. The engines can be certified up to the EURO 5 / US2007 emissions standard. (Converting engines from diesel to CNG requires some good amount of expertise and may involve downtime.)

Suggested engine modifications to assure engine reliability, optimized power, fuel consumption and emissions may include optimizing compression ratio, valve lift, valve timing, exhaust system and intake manifold. Special attention goes to engine cooling, engine lubrication and the potential issue of excessive oil consumption. A properly modified engine can make the same power as the base engine.

Gasoline Engine Conversions
            May need to improve cooling system efficiency
            May need engine oil cooler
            May need new valve seats
            For higher efficiency, engine compression can be increased 

Diesel Engine Conversions
            May need to improve cooling system efficiency
            May need engine oil cooler
            May need new valve seats, guides and seals
            May need new pistons and rings
            Engine compression must be lowered
            May need a new camshaft
            Ignition system must be installed
            Cylinder head modifications are needed to install spark plugs
            Custom cam or crankshaft position sensors must be made
      

 NOTE:

*         A detailed project evaluation and thorough inspection of the engines is required prior to purchase order acceptance.

*         Not all diesel engines can be successfully converted. Some engines require a great amount of mechanical changes to operate reliably. Some converted engines can not be tuned to the strictest emission standards.   

 Please fill out Pre-evaluation Form for each type of engine.