ABSTRACT
Increasing fuel costs and tightening environmental legislation drive an interest among users of existing diesel engines to look at options to improve fuel efficiency and reduce exhaust gas emissions formation. In most places of the world, natural gas is continuously available at a reasonable price, and its properties make it an interesting alternative fuel for use in internal combustion engines. The option of converting existing diesel engines to dual fuel capability allows flexibility in the fuel supply, but also potential reductions in operational costs and exhaust gas emissions. However, the conversion of existing diesel engines to dual fuel operation implies possible combustion problems that need to be addressed.
