How to kill vibrations of Vehicles thru’ the Best Power-train Mounting ?

A: A. That would show up later as hardness drift and tear risk rather than the current NVH exceedance. B. That standard addresses machine health, not structure-borne path tuning. D. ASIL governs safety functions and diagnostics, not how much 2nd order torque ripple reaches the body. C. This requirement exists so mount properties are measured in a way that predicts installed transmissibility.

A: A. That failure mode needs sustained ozone exposure and time. B. That mechanism stiffens rubber and moves the problem the other way. D. That would show bond failure symptoms, not smooth rate drift. C. This mechanism exists because elastomer chemistry interacts with hydrocarbons and alters effective spring rate.

A: A. That would mask a root cause if the mount is mis-installed. B. That consumes time and doesn't address an assembly-induced rate shift. D. That test won't tell you why today's vehicle shakes at idle. C. This order exists because preload errors move the operating point of an otherwise in-spec mount.

A: A. That fault tracks vehicle speed, not engine order. B. That manifests as random excitation rather than a clean order. D. That failure mode requires clutch engagement. C. This explains the gear dependence and hot condition sensitivity.