Dual Fuel Engine
DF or Duel Fuel Engines are the kind of engines which could operate on a mixture of gas fuel or diesel fuel or it could operate on diesel fuel alone. Duel Fuel engines are not able to run on gas alone as they do not posses 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 lean-burn, spark-ignited engine at 100% load. It could even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are certain applications that have proved difficult for the forklift. For example, scrap metal is one of these problems. In order to successfully handle things like this needs utilizing the right kind of machinery for the job.

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

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

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