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

As 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 lean-burn, spark-ignited engine at 100% load. It can even be greater on lower loads.

Lift Truck Classification and Fuel Sources
There are certain applications which have proved difficult for the forklift. For example, scrap metal is amongst these issues. To be able to successfully handle items like this needs utilizing the correct kind of machine for the task.

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

Electric powered trucks are the most popular, mostly 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, around more than 90% are propane powered.

The battery is the forklifts most common power source. Battery fueled units make up approximately 60% of the new forklifts sold within the United States. Their benefits comprise: less maintenance requirements, quiet operation, the ability to be utilized outdoors and indoors with no harmful emissions.