Consideration about Engine mount, A3 8PCAX

Audi A3 ABA 8PCAX 10-year-old model whose increase in NVH prompted me to replace the engine mounts.

I thought it was simply a decrease in the viscoelasticity of the rubber of the liquid-sealed mount and the loss of liquid, but as I observed the changes before and after the replacement of the parts in detail, I learned a lot and was forced to change my long lasting concept.

Absence of abruptness when braking was apparent after that.

Load transfer became gradual by suspending well the mass of motor and transaxle.

The dogbone pendulum mount that he hasn't changed yet affects on the steering response, not so good but not so bad.

The frequency of the shaking is well involved in maintaining straightness, so she has a dull steering response, but she goes straight somehow.

It straddles the front axle weighing 200kg, so the rocking motion has a great effect on straightness.

Not only does it's damper springs improve ride comfort, but the condition of it's front engine mounts also greatly affects on rear ride quality.

Supporting a vehicle weighing more than 1 ton moving at high speed, putting a mass of 200 kg in the steering section and hung it with rubber's repulsive force as a mass balancer to dampen vibrations and noise while establishing a seismic isolation structure.--- I get a headache just by such an imaginations.

Research and development engineers must be making efforts to match the viscoelasticity and dynamic equilibrium of rubber.