摘要：AbstractThis paper optimized the powertrain transmission ratio of a heavy duty truck for saving energy. With 142659 sets of actual road operation data of vehicle including speed, fuel consumption, etc., a typical vehicle driving cycle HTDC-1800 was constructed, and it was applied into a truck performance simulation model to study the effect of transmission gear ratio on the fuel consumption. With the powertrain gear ratios as design parameters, fuel consumption as optimization objective, Multi-Island Genetic Algorithm was used to optimize powertrain gear ratios. The optimal scheme of powertrain transmission ratios was obtained by joint simulation with coupling the vehicle performance simulation model and the optimization model, and the vehicle’s fuel consumption decreased by 8.19% without apparent decline of dynamic performance.
