The concept of fumigation bi-fuel is not new. Rudolph Diesel who invented the engine, experimented with enriched combustion air mixtures in the early 1900’s calling it "illuminating gas". Over the road truckers have known for years that they can get more horsepower if they put some form of flammable gas into the air breather. They also know they can blow up the engine if they’re not careful.

Over the years, engine designers pursued the direct injection method of metering gas into the cylinder. Large engine manufacturers offer modern bi-fuel engines using high-pressure injection for engines used in power plants. These systems are expensive, high tech, and require high-pressure gas delivery.

In the early 80’s fumigation attracted the attention of experimenters who where trying to reduce exhaust emissions and fuel costs. While the concept sounds simple, the task of maintaining a balance of diesel and gas across the power range of an engine became a roadblock. The technology has continued to be improved to reach today’s ITG standards. Controls, checks and balances allow any diesel engine to perform efficiently and safely on bi-fuel.