Abstract: A product ecological design method integrating theory of inventive problem solving(TRIZ) is proposed to resolve the ecological innovation issues involving in the process of product design. Combining case base and patent base, this method utilizes ecology efficiency factors and TRIZ engineering parameter correlating table to establish contradiction matrix, which will be solved by TRIZ tools. It also evaluates the available solutions deduced to select the optimum. Detailed methods are stated to significantly promote the efficiency and success rate of ecology design in the sense that case searching is studied and refined to improve the effectiveness, the trend of technique evolution is analyzed to provide design engineer great inspiration, and CAD system is constructed to offset the drawback of artificialness. A case study of differential friction disk design is introduced to validate this method.

Key words: Contradiction matrix, Ecological design, Ecology efficiency factors, Theory of inventive problem solving (TRIZ)