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An effort to integrate a structural optimization process into the carbon canister bracket design is presented to demonstrate the benefits of an upfront Computer-Aided Engineering (CAE) driven design. Structural optimization methods - including topology, shape, and size optimization - are used to develop the injection molded plastic carbon canister bracket. Furthermore, the incorporation of the Knowledge Base Engineering (KBE) features in the design process not only accelerates the design process but also ease manufacturing feasibility. Even though topology optimization has been widely used to explore the initial topological designs of different products, it is still a great challenge to explore shell like structure designs with 3D solid design package spaces using topology optimization method.