Doosan Diesel Forklifts Long Beach

Forklift Engines

Forklifts are classified as small-engine vehicles. Forklift engines all follow the principles of internal combustion, though the many models and makes of lift truck would have a different design and layout. Forklifts are designed more toward producing high torque rather than for speed. They usually are geared to low speeds. The engine runs the drive wheels of the forklift. The engine is also required to lift and lower the forks through a series of chain pulleys. Nearly all modern lift truck engines are powered by propane as they would be used indoors, where diesel and gasoline engines would be unsuitable because of the exhaust they create.



A four-cylinder engine-block is usually found in a lift truck. Much like the engine in small automobiles, forklift engines have cylinders which contain pistons connecting to a camshaft. Each and every cylinder head has an intake hatch, an exhaust hatch and a spark plug, each of them spring-loaded and one-way.



Engine Function

Propane passes through the opened throttle-plate in a fine spray, when the driver starts up the forklift engine. This fine spray mixes together with air which comes from the mass air intake before moving into the head intake hatches of the cylinder. Each one of the four pistons is staggered to rise in an exact sequence, that compresses the mixture of propane and air as each piston rises to the top of the head. With extremely precise timing, the alternator and battery of the engine produce an electrical current that passes through the spark plug. The fuel ignites causing an explosion which drives the piston back down to the bottom of the cylinder, resulting in a continuous turning of the camshaft. In the cylinder, an air pressure imbalance causes the the exhaust hatch to draw out exhaust as more fuel passes into the cylinder. Propane burns much cleaner compared to gasoline and diesel and the exhaust is not as harmful.

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