Patent ID: 9158868
Filing Date: 2015-10-13
Classification: B60K,B62D,F16F,G06F

Abstract:
1. A method of designing a powertrain mounting system for a vehicle powertrain, the powertrain mounting system having a plurality of powertrain mounts including a first powertrain mount and a second powertrain mount, the powertrain mounts having a spatial arrangement relative to the powertrain; the method comprising: selecting a first gradual rate of change of static stiffness under load for the first powertrain mount; wherein the first gradual rate of change of static stiffness of the first powertrain mount includes a first average rate of change of static stiffness in a first range of dynamic loads, and a second average rate of change of static stiffness in a second range of dynamic loads; wherein the first average rate of change of static stiffness is less than the second average rate of change of stiffness; wherein loads in the first range of dynamic loads are lower than loads in the second range of dynamic loads; determining a corresponding second gradual rate of change of static stiffness under load for the second powertrain mount using the selected first gradual rate of change of static stiffness in a static equilibrium torque balance equation of respective torques at at least the first and the second powertrain mounts based on the spatial arrangement of at least the first and second powertrain mounts relative to the powertrain; and providing the powertrain mounting system having the first powertrain mount exhibiting the first gradual rate of change of static stiffness when under load and the second powertrain mount exhibiting the corresponding second gradual rate of change of static stiffness when under load.