Power supply vehicles can be called mobile power supply vehicles, emergency power supply vehicles, and power generation vehicles. A multifunctional emergency power vehicle is a specialized vehicle equipped with a generator set and a power management system; Mobile power vehicles are mainly used as mobile emergency backup power sources in places such as power, communication, conferences, engineering rescue, and military, which can prevent the serious impact of sudden power outages. Electric vehicles generally have good off-road performance and adaptability to various road surfaces, suitable for all-weather outdoor operations, and can work in harsh environments such as extremely high temperatures, low temperatures, and sandstorms. It has the characteristics of overall stable and reliable performance, easy operation, low noise, good emissions, and good maintenance, which can well meet the needs of outdoor operations and emergency power supply. The power vehicle adopts an engine with non electric starting and air as the cooling medium, which not only eliminates the maintenance of the battery and air box water tank, as well as the trouble of adding coolant, but also can work in harsh environments such as extremely high and low temperatures and dust.