Conference article

Real-time Drive Cycle Simulation of Automotive Climate Control System

Anand Pitchaikani
Emmeskay, Inc, USA

Kingsly Jebakumar S.
Emmeskay, Inc, USA

Shankar Venkataraman
Emmeskay, Inc, USA

S. A. Sundaresan
Emmeskay, Inc, USA

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Published in: Proceedings of the 7th International Modelica Conference; Como; Italy; 20-22 September 2009

Linköping Electronic Conference Proceedings 43:99, s. 839-846

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Published: 2009-12-29

ISBN: 978-91-7393-513-5

ISSN: 1650-3686 (print), 1650-3740 (online)


Technologies like hardware-in-the-loop simulation (HILS) can play a significant role in reducing the product development life cycle. An essential requirement for HILS is the availability of system models that are capable of running in real-time. This paper demonstrates a closed loop real-time simulation of a vehicle with a climate control system model developed in Modelica. This paper details the modeling aspects of the vehicle system and climate control system using the object-oriented; acausal modeling language Modelica. To demonstrate the real-time simulation capabilities of the developed models; they were integrated with a controller model developed in the Simulink environment and the integrated model was then simulated in an Opal-RT real-time environment. This paper describes the models developed and the tool-chain used to achieve real-time simulation. The real-time simulation results as well as the performance results are also presented. This paper demonstrates Modelica’s capabilities in creating models for real-time vehicle climate control system simulations.


Climate control system; vapor cycle; closed-loop simulation; real-time simulation


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