A sequential turbocharging system has at least two turbochargers, wherein one turbocharger has a turbine provided with adjustable flow regulation means.

Then we discuss the composition, the principles and the realization ways of the distributional CAN bus-based monitoring system for the sequential turbocharging diesel engine test bed.

This paper analyses deeply about the discipline of sequential turbocharging, puts forward that this technique is more ideal in improving the performances of diesel locomotive with part load.