Doosan Diesel Forklifts San Francisco

Forklift Engines

Forklifts are classified as small-engine vehicles, the same class in which lawnmowers are categorized. Forklift engines all follow the principles of internal combustion. Various lift truck models and brand names would have varying engine design and layout. Forklifts are made more toward generating high torque rather than for speed. They normally 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. Most modern forklift engines are powered by propane because they will be used indoors, where diesel and gasoline engines would be inappropriate due to the exhaust they generate.



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



Engine Function

When the operator starts up the engine of the forklift, propane passes through the opened throttle-plate in a fine spray and mixes with air coming from the mass air intake before moving into the head intake hatches of the cylinder. Every one of the four pistons is staggered to rise in a precise sequence, compressing the air and propane mixture as every piston rises to the top of the head. With timing which is very precise, the engine's battery and alternator produce an electrical current that passes through the spark plug. The fuel ignites leading to an explosion that 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 cleaner compared to diesel and gasoline and the exhaust is not as harmful.

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