Simulation Analysis of Fire Warning in Bus Engine Compartment Based on PyroSim

The engine compartment is an area with high incidence for bus fire. Its structure is complex and it is bad for the monitoring condition. It is difficult to be detected in the early stage of fire. When danger is observed, it is difficult to be controlled, which cause heavy losses. So, three kinds of fire model for bus engine compartment was developed. With PyroSim simulation, it was found that the position where above the engine compartment and away from the rear of the radiator is effective for monitoring the temperature and smoke. After the bus engine compartment fire started, the position of sensors is of importance to detect fire early and protect the safety of life and property.