What propulsion method is commonly used for mobile cranes?

Diesel engines are commonly used for mobile cranes primarily due to their efficiency, power output, and reliability. Diesel engines offer a higher torque at low RPMs, which is essential for cranes that need to lift heavy loads. This characteristic allows mobile cranes to operate effectively under load, providing the necessary strength for lifting and maneuvering heavy materials on construction sites.

Moreover, diesel engines tend to be more fuel-efficient than gasoline engines, especially under load, which is advantageous for mobile cranes that may operate for extended periods. The durability and longevity of diesel engines in heavy-duty applications align well with the demands of construction operations, reducing the frequency of maintenance and the need for engine replacements.

While electric motors can also be used in some crane applications, they are not as widely employed in mobile cranes due to limitations in mobility, range, and the reliance on battery power. Gasoline engines and steam engines are less favorable in this context because they do not provide the same level of efficiency, power, or operational cost-effectiveness as diesel engines do in heavy machinery. Thus, diesel engines remain the preferred choice for mobile crane propulsion.