VERIFICATION OF POWERTRAIN CONTROL SYSTEM SOFTWARE CONTENTS IN HIL ENVIRONMENT FOR DIESEL ENGINE E6D

VERIFICATION OF POWERTRAIN CONTROL SYSTEM SOFTWARE CONTENTS IN HIL ENVIRONMENT FOR DIESEL ENGINE E6D In the general contest of the increasing application of electronic technologies to vehicles and of the more stringent requirements on pollutants emission control, the purpose of this thesis work is to analyze the state of art of current diesel engine systems dedicated to NOx reduction from architecture and software strategies point of view and realize, with a proper methodology and on the base of specific requirements and software weaknesses, an activity of first validation aimed to guarantee the effectiveness of these strategies and to avoid all possible negative impacts on the final customer. The first part of the work is dedicated to the Engine Management System overview and consequently to the description of the Hardware-in-the-Loop environment utilized for the activity; in the following part the general inputs, outputs and methodology of software verifiction as a step of the whole V cycle are provided. Starting from NOx generation, the Selective Catalytic Reduction with ammonia (SCR), which is the current solution adopted in the engine model simulated in HIL, is introduced and a focus on its management system is provided: it consists of a Dosing Control Unit (DCU), that controls and monitors the urea injector and all dosing system components and transmits inducement information to the Engine Control Module (ECM) on a private CAN bus. This activity has been done in intership with Kineton S.R.L. and in cooperation with FCA EMEA Verification and Validation department and the software supplier Robert Bosch (RB); in this contest the inputs, consisting of the requirement developed by FCA and the implementation proposal designed by RB, or simply consisting of software implementation modifications performed by RB, have been analyzed and, following the mentioned verification methodology, several test cases have been developed and executed utilizing INCA tool in the computer simulation environment; the relative results have been reported in output; in case of positive test result, the funcionality required by the car maker has been considered successfully met by the software supplier; otherwise, car maker and software supplier have discussed in cooperation with the thesis work’s author in the capacity of verification tester to analyze the software bug and actuate a recovery action to eliminate its effect.