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Two or more aftertreatment systems will be required for diesel vehicles to reduce PM and NOx, simultaneously and achieve the same levels of exhaust emissions as gasoline vehicles. Thus, aftertreatment devices such as the DPF and DeNOx catalyst need to be compact and less restrictive to exhaust gas flow. An IP Filter for removing particulate in exhaust gas has been developed to reduce both unit size and pressure drop and structured to integrate the DOC and DPF functions into one unit. A conventional wall-flow DPF has a cellular structure with either individual open-end or closed-end channels on both the inlet and outlet sides. The IP Filter has no plugs on the front end but has plugs at the interface of the DOC and DPF parts (internal plugs) in addition to the plugs at the rear end. Several test IP Filters that were made of highly porous cordierite material were prepared for testing to evaluate their performance characteristics.

It is said that rollforming technology is one of the most effective uses of Ultra High Strength Steel (UHSS). The method by which a new vehicle side structure concept can satisfy IIHS (Insurance Institute for Highway Safety) side impact test criteria was studied by utilizing IIHS’s technologies. First of all, the best structural ideas for each part (e.g. B-pillar, side sill, roof cross member and floor cross member, etc.) based on the closed sections utilizing the rollforming technology and UHSS were studied using the crash CAE of each part. The best solutions for each part were assembled on the vehicle side structure CAE model, and the crash performance of the IIHS side impact test was confirmed using the module part of the crash CAE model. The great weight saving possibility of the new vehicle side structure concept was proven by comparing it to the conventional structure concept based on the stamped parts.