Which engine type is commonly used in portable generators?

The commonly used engine type in portable generators is the small gasoline engine. These engines are preferred due to their lightweight and compact design, which aligns well with the need for portability. Small gasoline engines are efficient and powerful enough to provide the necessary output for various applications, making them ideal for generators used in outdoor settings, such as camping, construction sites, or emergency power supply.

Furthermore, gasoline engines tend to be more readily available and easier to maintain compared to other engine types. They can offer a quick refueling option, allowing for extended use without the long charging times associated with electric engines. Other types of engines, like hybrid or steam engines, are less common for portable generators due to their complexity and size, which detracts from the portability aspect. This makes the small gasoline engine the optimal choice for portable generator applications.