In this paper, we present AutoMed, an automated mediator for multi-issue bilateral negotiation under time constraints. AutoMed uses a qualitative model to represent the negotiators' preferences. It analyzes the negotiators' preferences, monitors the negotiations and proposes possible solutions for resolving the conflict. We conducted experiments in a simulated environment. The results show that negotiations mediated by AutoMed are concluded significantly faster than non-mediated ones and without any of the negotiators opting out. Furthermore, the subjects in the mediated negotiations are more satisfied from the resolutions than the subjects in the non-mediated negotiations.