Browse Publications Technical Papers 2024-26-0228

Effect of Environmental Factors on the Function of an Automotive Luggage Cover of a Passenger Vehicle – A Case Study 2024-26-0228

The Indian passenger vehicle market has grown by more than 40% by volume in the last decade and has reached a record high in FY23. This has created a more diverse and demanding customer base that values interior design and quality. The modern customer expects a high level of aesthetics and sophistication in their vehicle interiors - including in the luggage area.
The Luggage Cover (Parcel Tray) is a component in the luggage area of a passenger vehicle that is used to conceal the luggage & improve its aesthetics. The cover is generally made of thermoplastic material with rotating hinges and is held in its place by the compression from the back door, which is frequently opened and closed. The parts that connect the cover to the door (usually an elastomer interface on the thermoplastic tray) tend to change over a period due to climatic conditions and leads to rattling concerns over a period.
The change in elastomer interface with the back door (due to repeated compression & climatic cycles) leads to a change in forces on the composite tray which in turn results in a permanent set. After deformation, the tray is highly vulnerable and can easily rattle causing noise and discomfort. Restricting the rattle of the luggage cover is challenging – especially considering its prolonged usage under stress while being subjected to climatic cycles.
There are various factors that affect the interface & there are alternatives that can improve or deteriorate the condition like change of properties / raw material for rear cushion, the material, physical properties of the shelf (cover) and the basic layout among other factors. This paper intends to study the causes and effects of the delayed failure.


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