Dual Fuel Engine
DF or Duel Fuel Engines are the kind of engines that can operate on a mixture of gas fuel or diesel fuel or it can operate on diesel fuel alone. Duel Fuel engines could not work on gas alone as they do not have an ignition system, nor do they have any spark plugs.

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

Lift Truck Fuel Sources and Classifications
There are some recycling materials handling applications that can prove extremely difficult for lift trucks. For example, scrap metal is one of these problems. In order to successfully handle things like this needs using the right kind of equipment for the task.

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

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

The most popular power source for lift trucks is battery. Battery powered units make up about 60 percent of the new forklifts sold in the USA. Their benefits comprise: quiet operation, less maintenance requirements, the ability to be utilized indoors and outside with no harmful emissions.