Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines that can work on a mixture of diesel fuel and gas fuel or it can run on diesel fuel alone. Duel Fuel engines are not able to run on gas alone since they do not posses an ignition system, nor do they possess any spark plugs.

Because the engine is not a pure diesel engine and diesel is not a pure gas, this machinery does suffer from poor fuel efficiency and Methane slippage. For example, the fuel efficiency may be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100 percent load. It could even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are certain recycling materials handling applications that could prove very difficult for lift trucks. Like for instance, scrap metal is one of these problems. To be able to successfully handle items like this needs utilizing the right type of machinery for the job.

In this write-up, the 7 major lift truck classes are discussed, including the power sources such as hydrogen fuel cell, liquid propane gas, electric, gasoline and diesel. The power source is linked to several of these specific classes. The main power sources for forklifts include Battery, Diesel, Gasoline, Propane and Fuel Cell.

Electric powered trucks are the most popular, mainly Class III, III and class I forklifts. Internal combustion engines are more common in Classes IV and V. The most common electric power source is the lead-acid battery. Out of internal combustion trucks, approximately over 90 percent are propane powered.

The most popular power source for lift trucks is battery. Battery powered units make up approximately 60 percent of the new forklifts sold in the United States. Their benefits consist of: quiet operation, less maintenance requirements, the ability to be used inside and outside with no harmful emissions.