Dual Fuel Engine
DF or Duel Fuel Engines are the kind of engines which can work on a mixture of diesel fuel and gas fuel or it can run on diesel fuel alone. Duel Fuel engines could not operate on gas alone because they do not posses 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 fuel efficiency, as well as Methane slippage.. Like for example, the fuel efficiency can be 5% to 8% less than in a comparable spark-ignited, lean burn engine at 100% load. It could even be greater on lower loads.

Lift Truck Classification and Fuel Sources
There are certain recycling materials handling applications that could prove really challenging for lift trucks. Like for instance, scrap metal is one of these issues. In order to successfully handle items like this needs using the correct type of equipment for the job.

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 several of these specific classes. The main power sources for forklifts comprise Gasoline, Battery, Diesel, Propane and Fuel Cell.

The most popular overall are electric powered trucks, mainly in Class III, II and class I forklifts. In Classes IV and V, internal combustion trucks are more common. The most common electric power source is the lead-acid battery. Amongst internal combustion trucks, roughly more than 90% are powered by propane.

The battery is the forklifts most common power source. Battery powered units make up around 60 percent of the new forklifts sold within the United States. Their benefits include: less maintenance requirements, quiet operation, the ability to be utilized inside and outside with no harmful emissions.