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Technical Paper

Improved Powertrain Mounts Position for Four Cylinder Engine Commercial Vehicle with Four Point Mounting Configuration

2016-02-01
2016-28-0231
In this era of engine downsizing, the powertrains with higher power densities are configured on next generation vehicles. The bare four cylinder engine without balancer shaft has higher surface velocities, sound pressure & power levels and nearly 10 to 15% higher base level vibration/forces over older generations. Adapting such engines on a new vehicle platform with stringent NVH targets is challenging. Powertrain mount modal analysis, 6DOF or 16DOF is a primary tool followed for initial mount positioning and stiffness definition. From our earlier experiences we have the knowledge that most of the 6DOF iterations lead to the mount positions which are less feasible as per vehicle architecture and packaging point of view, and further optimization is needed to arrive at suitable mount position through 6DOF analysis. In a drive to have first time right solution with minimal modifications, the study was conducted to understand the role of mount position & isolation on different vehicles.
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