In order to realize the autonomy and diversity of interaction among product development activities

an interaction model of product development activities is constructed based on the cell interaction mechanism

which can support the management and optiminization of product development process. Firstly

the cell interaction mechanism is analyzed. Secondly

the function of cell membrane and input/output channels of the matter

energy and information are illustrated in detail. Thirdly

the cell interaction meta-model is established by using Petri net. Finally

the meta-model is validated in the design process of automobile fuel pumps.