Abstract
Vehicle high mileage warranty issues associated with powertrain mounts are one of the major concerns in vehicle design for long-term customer satisfaction. The present paper is concerned with a root cause understanding of high mileage degradation mechanisms of hydraulic engine mounts. Engine mount stiffness degradation characteristics are studied using laboratory test data. The correlation between the number of powertrain mount related warranty claims and mean temperatures of different geographic areas in the United States is presented. The effects of underhood thermal management design on mount temperature and strategies for improving high mileage mount degradation are discussed.
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