Doosan Diesel Forklifts Austin

Lift truck Engines

Forklifts are classified as small-engine vehicles. Forklift engines all follow the principles of internal combustion, while the many makes and models of lift truck would have a different layout and design. Forklifts are designed more toward producing high torque rather than for speed. They generally 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 via a series of chain pulleys. The majority of modern lift truck engines are powered by propane because they would be utilized for indoor applications, where gasoline and diesel engines will be unsuitable because of the exhaust they generate.



A four-cylinder engine-block is typically found in a lift truck. Much like the engine in small cars, the engines of the forklift have cylinders containing pistons connecting to a camshaft. The head of each cylinder consists of an exhaust hatch, a spark plug and an exhaust hatch, each of them one-way and spring-loaded.



Engine Function

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

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