Application of AVL BOOST modeling to optimize the engine working load and drivetrain transmission ratio of the diesel firefighting pump system

The drivetrain is an essential component of the diesel firefighting pump system, affecting the engine's operating mode, power, economy, and environment. This study proposes a process to design and optimize the transmission ratio and working load of the diesel firefighting pump system. AVL BOOST software was used to model the 6-cylinder diesel engine and analyze the performance characteristics at its partial loads as parameters for finding the optimal transmission ratio of the drivetrain. The optimal transmission ratio determined in this work is 1:1.2, along with engine partial load mode of 57 %, which can improve the engine's fuel efficiency by 8 % compared to the 1:1 transmission ratio. A belt drive is calculated and designed to transfer power between the engine and the firefighting pump. The optimal drivetrain transmission ratio and engine working mode can increase the fuel economy and lifespan of the engine, decrease the engine's maintenance costs, and reduce environmental pollution and greenhouse gases.