A Primer on Jounce Bumper Design Using Microcellular Polyurethane

Much has been written over the years regarding the advantages of using microcellular polyurethane (MPU) within the area of chassis and suspension systems. However, there have been limited discussions in an open forum of the geometric design requirements for MPU jounce bumpers. The objective of this paper is to provide a primer for MPU jounce bumper design for engineers working in the chassis and suspension field. Geometric design principles and the effects on manufacturability and durability will be presented to systematically show the limitations and advantages of MPU technology in creating a final jounce bumper design.