Noise-absorbing and vibration-damping materials
Both a foam-based sealing material and a non-adhesive, highly porous foam filler are applied to the roof panel and pillars to reduce ram air and road traffic noise.
The necessary rigidity of the front floor panel is provided by its curved shape, which made it possible to minimize vibration.
Amplifiers have been added on both sides of the floor tunnel to significantly reduce the vibration of the front floor panel.
Thanks to the installation of a two-layer felt sheet soundproofing material on the partition of the engine compartment, the penetration of engine noise into the passenger compartment is significantly reduced.
The windshield has two layers of sound-absorbing glass with three layers of film in between. This made it possible to reduce the penetration of the engine hum into the passenger compartment as a result of reducing glass vibration in the zone of the most intense resonance.
To reduce the penetration of road noise and engine hum into the cabin, sheets of soundproofing felt material are installed on the inside of the hood, walls of the ventilation duct, mudguards of the front fenders, and fender liner is also installed in the wheel arches.
To reduce the penetration of the engine rumble into the passenger compartment, an elastic vibration damping support is installed on the front suspension subframe.
To reduce the penetration of road noise, engine noise and hum into the cabin, the floor is covered with sheets of soundproof bituminous mastic.
Sound insulation of the cabin
Pic. 8.6. Sound insulation of the cabin
To reduce road noise in the cabin, the following soundproofing materials have been applied.
- Foam-based sealant used to seal the A-pillar-to-windshield connection.
- The roof upholstery is made of sound-absorbing material.
- Noise absorbing material is routed between the roof reinforcements on conventional roof models.
- Floor mats are made of sound-absorbing material.
- Felt material is applied to the inside of the roof, hood, door trim, luggage compartment side panels, luggage compartment side trim, tailgate, rear mat and storage box in the luggage compartment.
Reduction of aerodynamic noise
Pic. 8.7. Reduction of aerodynamic noise
The penetration of aerodynamic noise into the cabin is reduced as a result of the following design measures.
The protrusion of the lower part of the A-pillar above the windshield has been reduced.
By changing the angle of the ventilation grill on the hood, the air flow to the windshield wipers is reduced.
The distance between the door glass and the outside rear-view mirror has been increased by moving the installation location of the outside mirror to the door panel.
Sealed the gap between the doors on the middle pillar.
Aerodynamics
Installed aerodynamic shield for the right side of the fuel tank. The shield adjusts the difference in height between the left and right sides of the fuel tank and equalizes the surface of the fuel tank with the front of the bottom. As a result, air turbulence around the rear suspension parts is reduced and other aerodynamic characteristics are improved, resulting in excellent vehicle directional stability.