FMVSS 103 is one of the requirements to be passed by any vehicle and it is mandatory by Federal Government. It requires that the defrost mechanism be robust enough to melt the ice off the glass in -20 C ambient within 30 minutes. In electric cars this is more challenging than traditional ICE cars as there is no heat from the ICE and the heat pump mode does not operate at such low temperatures. In Bytonâs smart electric vehicle due to the oversized Coast to Coast screen which lead to lack of packaging space, having a proper impingement angle was not achievable so plenty of vanes and baffles were used to solve this problem. CAE/CFD was used as a powerful tool to optimize the geometry both in subsystem and whole cabin level. The CAE model is very comprehensive and includes phase-change of the ice on glass and whole cabin detailed geometry with four passengers. Afterwards, the test was conducted and is still in progress, and the correlation study will be completed in future articles.
Optimizing the Defrost Vents to Meet FMVSS 103 in a Bytonâs Electric Smart Vehicle
2019
Conference paper
English
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