Henrik Philippi: Bachelor's Thesis

Submitted: November 2018

Abstract

In September 2017 the European Union replaced the old type approval procedure for cars called NEDC with the new WLTP. The new procedure aims to improve — among other things — the CO₂ emission estimation for the car by introducing a new driving cycle WTLC. With the objective of simplifying the introduction of WLTP, a correlation software called CO₂MPAS was developed to translate the new procedure’s CO₂ results into the old test results without physically driving the test. The software back-translates the average CO₂ emissions measured in the new test to the old values by simulating the old test with a number of measurements done while performing the new test procedure. The software has a direct effect on the enforcement of currently active EU regulations that aim to limit CO₂ emissions. We investigated, how this software works. In a first step, the underlying framework of CO₂MPAS — Schedula — was analysed via testing and study of the documentation and source code. From this, a theoretical foundation for the framework was developed to allow deeper investigations of programs written in Schedula. In a second step, the gained knowledge was used to manually inspect the Schedula model of the car simulation in CO₂MPAS. The size of this model does not allow for exhaustive analysis, however this work provides some insight into some key elements of the computation.