Test bench for vehicle turbocharger durability under start-stop working conditions: simulation and applied research

A new experimental test bench that is based on the self-circulation method is proposed for testing turbocharger durability under frequent start-stop conditions. The feasibility of the test bench is verified through simulation. First, a mathematical model for the test bench is established in accordance with its actual working process. Then, the corresponding modules for its dynamic simulation are established in Matlab/Simulink. Meanwhile, to verify the feasibility of the key hypothesis for the mathematical model, the local pipeline flow is simulated on CFX. Results showed that the proposed test bench can operate steadily with low energy consumption during the testing of turbocharger durability under start-stop conditions. Additional data, such as fuel injection pressure, intake gas rate, and combustion gas temperature, are provided for practical applications.