What type of coolant pump is most commonly used in highway diesel engines?

The most commonly used coolant pump in highway diesel engines is the centrifugal pump. This type of pump operates by using a rotating impeller to move fluid, which makes it highly efficient for applications where a steady flow of coolant is required. In diesel engines, maintaining a consistent and adequate flow of coolant is vital to regulate operating temperatures during various conditions, especially under heavy load.

Centrifugal pumps are favored in highway diesel engines because they can handle significant volumes of coolant with relatively low mechanical complexity. This means they are less likely to require frequent maintenance and are more reliable over the long term, which is essential for commercial vehicles that often encounter rigorous operating conditions. Their design allows for smooth operation and the easy adaptation to different engine sizes and cooling requirements, making them ideal for widespread use in the automotive and transportation industries.