Drivetrain Noise, Vibration, and Harshness

Abstract This chapter describes the plethora of noise, vibration, and harshness ( NVH ) concerns in vehicular drivetrain systems. With a trend toward compact lightweight lightly damped drivetrain systems, such phenomena are likely to exacerbate. Significant NVH concerns such as transmission rattle, driveline clonk, and clutch in‐cycle whoop are described and methods of measurement and modeling are described. These NVH phenomena are regarded as refinement quality issues by vehicle customers, thus a concern to the automobile industry. Various methods of palliation are also discussed.