For additional information, e-mail Ben Weber, Southwest Research Institute. Surface Analyzers The Automotive Products and Emissions Research Division uses surface analyzer technology in a variety of programs. One instrument uses laser interferometry to determine how varying component forms and surface textures affect fuel and lubricant performance in heavy-duty diesel engines. Components studied include piston rings, pistons, and cam lobe profiles. The staff obtains detailed data about surface texture variations in heavy-duty diesel engine cylinder liners and in preselected areas of the liner bore surface.
Researchers statistically assess liner bore surface texture variations.
Ring belt gas flow dynamics play a significant role in oil consumption. Using the Form Talysurf, SwRI assesses form and surface finish to calculate associated gas flow areas and estimate gas flow characteristics. Surface analyzers are also used to study the piston rings from heavy-duty diesel engines. The Institute obtains detailed information about the form, profile, and surface texture of the ring face contacting the cylinder bore surface. The Institute's Dorsey Ring Tension Machine precisely measures piston ring tension in pounds-force at a preselected piston ring end gap.