Dual Fuel Engine
DF or Duel Fuel Engines are the type of engines which could run on a mixture of diesel fuel and gas fuel or it can operate on diesel fuel alone. Duel Fuel engines can not operate on gas alone because they do not have an ignition system, nor do they have any spark plugs.

Because diesel is not a pure gas, and it is not a pure diesel designed engine, it has some disadvantages in the department of Methane slippage as well as fuel efficiency.. Like for instance, 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 could prove extremely difficult for lift trucks. Like for example, scrap metal is amongst these issues. To be able to successfully handle items like this requires using the right kind of machine for the job.

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

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

The battery is the forklifts most popular power source. Battery fueled models make up roughly 60% of the new forklifts sold in the United States. Their benefits consist of: quiet operation, less maintenance requirements, the ability to be utilized outdoors and inside with no harmful emissions.