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A crucial component utilized in the trunk space is the luggage board. Positioned at the bottom of the trunk, the trunk board separates the vehicle body from the interior and supports for luggage. The luggage board serves multiple functions, including load-bearing stiffness for luggage, partition structure functionality, noise insulation, and thermal insulation. There is a need for a competitive new luggage board manufacturing method to meet the increasing demand for luggage boards in response to the changing market environment. To address this, the "integrated sandwich molding method" is required. The integrated sandwich molding method utilizes three key methodologies: grouping processes to integrate similar functions, analyzing materials to replace them with suitable alternatives, and overcoming any lacking functionality through integrated design structures. This paper presents a methodology for developing the integrated sandwich molding method.

Headliner module system implies that all components, including fasteners that are attached to the headliner substrate panel prior to vehicle assembly installation. The headliner substrate becomes an installation fixture which facilitates the assembly process. Since headliner module is an integration of many separate components into one more complex assembly, prior to vehicle assembly, a number of additional requirements must be considered. Many of these requirements are driven by the factors like shipping, handling and installation of a large panel with various componentry mounted for temporary installation retention or permanent retention. Substrate should be tough but, on the contrary it should be soft enough for the curtain airbag deployment. Tough substrate interferes with airbag deployment. Detachable reinforcement will enhance shipping and handling process. After installation, reinforcement can be detached from headliner module which will keep the substrate soft.

Electric powered vehicles rely on electric heater to heat the cabin of the vehicle. These heaters consume electric energy from the battery and cause depletion of the vehicle's range by 20∼40%. In order to extend the range of electric vehicles, we need to increase the efficiency of HVAC. EV has waste heat but the heat power is much lesser than internal combustion engine and heat source is separated physically. In order to utilize waste heat to achieve better efficiency, heat collection, heat insulation, pre-heating are necessary. Based on the new concept system, we examined the effects of fuel efficiency