BODY STRUCTURE


  1. CONSTRUCTION


    1. Sound Absorption and Insulation Structure


      1. Various types of silencers are positioned around the floor panel and engine compartment to greatly suppress vibration and noise that are transmitted into the interior from parts such as the engine and tires, achieving superior quietness. Also, materials such as foamed materials, sound insulation sealant and damping materials are optimally positioned to achieve superior NVH* performance.

        Tech Tips

        *: An abbreviation created by taking the first letter of Noise (unpleasant sounds and loud sounds), Vibration (vibrations from the engine and tires) and Harshness (vibrations felt through the steering wheel, seats and floor according to height changes in the road surface, etc.). NVH is used to describe the level of riding comfort and sound quality actually experienced by passengers.

    2. Floor Silencer


      1. The floor silencer (applied damping materials) optimal thickness varies by the area, is lightweight and provides excellent quietness. These characteristics allow the floor silencer to reduce road and engine noise which enters the cabin.

      2. In what put out for coating of the thickness of the damping materials, I planned improvement of the silent nature and coexistence of the Mass reduction. (the constant coating ratio: approximately 900 g decrease)

        Figure 1. LHD

        B005664C01
        *A 2WD *B AWD
        *a Asphalt Seat *b

        Dry Surface Density: 1.8 (kg/m2)

        *c

        Dry Surface Density: 1.9 (kg/m2)

        *d

        Dry Surface Density: 2.0 (kg/m2)

        *e

        Dry Surface Density: 3.5 (kg/m2)

        *f

        Dry Surface Density: 3.9 (kg/m2)

        *g

        Dry Surface Density: 4.2 (kg/m2)

        *h

        Dry Surface Density: 4.6 (kg/m2)

        *i

        Dry Surface Density: 5.7 (kg/m2)

        *j

        Dry Surface Density: 6.0 (kg/m2)

        *k

        Dry Surface Density: 7.0 (kg/m2)

        *l

        Dry Surface Density: 7.4 (kg/m2)

        *m

        Dry Surface Density: 7.7 (kg/m2)

        - -

        Figure 2. RHD

        B0056MDC01
        *A 2WD *B AWD
        *a Asphalt Seat *b

        Dry Surface Density: 1.8 (kg/m2)

        *c

        Dry Surface Density: 1.9 (kg/m2)

        *d

        Dry Surface Density: 2.0 (kg/m2)

        *e

        Dry Surface Density: 3.5 (kg/m2)

        *f

        Dry Surface Density: 3.9 (kg/m2)

        *g

        Dry Surface Density: 4.2 (kg/m2)

        *h

        Dry Surface Density: 4.6 (kg/m2)

        *i

        Dry Surface Density: 5.7 (kg/m2)

        *j

        Dry Surface Density: 6.0 (kg/m2)

        *k

        Dry Surface Density: 7.0 (kg/m2)

        *l

        Dry Surface Density: 7.4 (kg/m2)

        *m

        Dry Surface Density: 7.7 (kg/m2)

        - -
    3. Sealing Material


      1. Foamed materials, NV covers and sponge sealant are optimally placed in the side member opening and front header to suppress wind noise and road noise which enter the cabin.

        Figure 3. Sealing Material (The illustration shown is an example only.)

        B00562EC01
        *1 Front Door Weatherstrip No. 4 RH - -
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section *d D - D Cross Section
        *e E - E Cross Section *f F - F Cross Section
        *g G - G Cross Section *h Foamed Material
        *i Sponge *j Aluminum Tape
      2. Foamed materials are optimally placed in the door frames to suppress wind noise around the passenger's ears and road noise which enters the cabin.

        B0056PHC01
        *1 Front Door *2 Rear Door
        *3 Front Door Silencer Pad *4 Rear Door Silencer Pad
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section *d D - D Cross Section
    4. Sound Absorption and Insulation Structure around Engine Compartment


      1. A hood insulator is provided on the rear of the hood sub-assembly. This achieves excellent sound insulation performance.

        B0056IDC01
        *1 Hood Insulator *2 Hood Sub-assembly
        *a A - A Cross Section *b Material Structure
        *c Non-woven Fabric *d Adhesion Layer
        *e Glass Fiber *f Urethane Foam
      2. The dash panel insulator outer is provided in the engine compartment side of the dash panel and a dash panel insulator assembly is provided in the cabin side. This structure absorbs and insulates mechanical noise such as engine noise and ensures excellent quietness.

      3. The dash panel insulator assembly uses a 3-layered construction that reduces the opening ratio* and ensures thickness to ensure superior sound absorption and insulation performance.

        Tech Tips

        *: Opening area ratio for the entire area of the insulator

        Figure 4. Dash Panel Insulator Outer

        B00562PC01
        *1 Dash Panel Insulator Outer *2 Dash Panel
        *a A - A Cross Section - -

        Figure 5. Dash Panel Insulator Assembly

        B0056H8C02
        *1 Dash Panel Insulator Assembly *2 Front Panel Side Silencer No. 1 LH
        *3 Front Panel Side Silencer No. 1 RH *4 Dash Panel Insulator Cover
        *5 Dash Panel - -
        *a A - A Cross Section *b Material Structure
        B005692 Urethane B0056SJ Olefin Sheet
        B0056TP Felt - -
      4. A front side air guide is used in the front fender to reduce the noise which travels through the fender toward the cabin.

        B0056VMC01
        *1 Front Fender Panel RH *2 Front Fender Reinforcement Sub-assembly Top RH
        *3 Radiator Cover Plate *4 Front Fender Apron RR RH
        *5 Front Fender Liner RH *6 Front Side Air Guide
        *a A - A Cross Section - -
      5. An insulator with superior sound absorption effects (sound insulation material) is used around the front fender liner and rear wheel house liner to suppress the sound created by flying sand and water from the wheelhouse and road noise in order to provide excellent quietness.

        Figure 6. Fender Liner (The illustration shown is an example only.)

        B0056KMC01
        *1 Front Fender Liner RH *2 Front Fender Liner LH
        *3 Rear Wheel House Liner LH *4 Rear Wheel House Liner RH
        *a Insulator - -
    5. Window Area


      1. The clearance between the front body pillar and windshield glass (H in illustration) is reduced and the width from the rain gutter molding ends to the doors is enlarged. As a result, air turbulence is rectified to flow along from the windshield to the doors to suppress air turbulence generation, achieving wind noise suppression.

        B0056P3C01
        *1 Windshield Molding Outside Lower RH *2 Windshield Molding Outside Lower LH
        *3 Windshield Glass *4 Front Body Pillar
        *a A - A Cross Section *b Air Turbulence Generated in Airflow from Windshield to Doors
      2. A structure that reduces the clearance between the door glass, garnish and weatherstrip as much as possible is used to create a flat surface. Wind noise is generated when the airflow is separated due to the clearance between the door glass and garnish. By eliminating the clearance, the airflow flows smoothly to suppress wind noise.

        B0056TYC01
        *1 Front Door Glass Sub-assembly LH *2 Weatherstrip
        *3 Front Door Window Frame Molding LH (Center Pillar Side) *4 Rear Door Window Frame Molding LH (Center Pillar Side)
        *5 Rear Door Glass Sub-assembly LH - -
        *a A - A Cross Section - -
      3. An air induction lip is provided on the top of the cowl top ventilator louver sub-assembly. The airflow flows above the cowl top ventilator louver sub-assembly and exits from the base of the front body pillars. This generates air turbulence, causing wind noise. The airflow from the base of the front body pillars is rectified using the air induction lips to join the mainstream airflow flowing along the body surface, achieving wind noise reduction.

        B005624C01
        *1 Windshield Molding Outside Lower RH *2 Cowl Top Ventilator Louver Sub-assembly
        *3 Windshield Molding Outside Lower LH *4 Air Induction Lip
      4. When the airflow flowing at the front body pillar and the airflow flowing from the front of the outer rear view mirror assembly collide against the door mirrors, air turbulence is generated and wind noise is caused. Therefore, the distance from the front body pillar (L in illustration) of the outer rear view mirror assembly is extended backward, and the distance from the front door glass sub-assembly (W in illustration) is enlarged, positioning parts where it is difficult for them to be affected by air turbulence.

        B0056OJC01
        *1 Outer Rear View Mirror Assembly LH *2 Front Body Pillar
        *3 Front Door Glass Sub-assembly LH - -
    6. Door


      1. A polypropylene resin service hole cover is used, reducing noise that enters from the outside to the cabin through the doors.

        B0056CBC01
        *1 Outer Mirror Install Hole Cover RH *2 Front Door Service Hole Cover RH
        *3 Rear Door Service Hole Cover RH - -
      2. An acoustic layer laminated glass* is used for the front door glass sub-assembly, rear door glass sub-assembly and rear door quarter window glass sub-assembly, reducing noise that enters from the outside to the cabin through the doors.

        Tech Tips

        *: Glass including a high level of sound proofing interlayer with a laminated glass structure (Glass - Interlayer - Glass)

        B0056T3C01
        *1 Front Door Glass Sub-assembly LH *2 Rear Door Glass Sub-assembly LH
        *3 Rear Door Quarter Window Glass Sub-assembly LH *4 Glass
        *5 Interlayer Film (Acoustic Layer) - -
      3. Polyester is used as a flocked material for the inner weatherstrips (front door glass weatherstrip inner and rear door glass weatherstrip inner) to suppress noise, achieving a high level of sound insulation performance.

      4. Resin corner pieces (front door vent seal, front door panel protector, rear door belt seal front and rear door belt seal rear) are used at the front and rear of the belt line to fill the clearance, ensuring a high level of sound insulation performance.

        B0056IFC01
        *1 Front Door Vent Seal LH *2 Front Door Glass Weatherstrip Inner LH
        *3 Front Door Panel Protector LH *4 Rear Door Belt Seal Front LH
        *5 Rear Door Glass Weatherstrip Inner LH *6 Rear Door Belt Seal Rear LH
        *a A - A Cross Section *b Flock
      5. Weatherstrips (front door weatherstrip, rear door weatherstrip, front door weatherstrip No. 4 and rear door weatherstrip No. 5) are used around the entire circumferences of the doors, reducing noise that enters from the outside to the cabin through the doors.

      6. 3 lips are provided for the frame area to ensure a high level of noise insulation performance.

        B0056FHC01
        *1 Front Door Window Frame Molding Upper LH *2 Front Door Glass Run LH
        *3 Rear Door Belt Molding Sub-assembly LH *4 Rear Door Glass Run LH
        *5 Front Door Weatherstrip LH *6 Rear Door Weatherstrip LH
        *7 Front Door Weatherstrip No. 4 LH *8 Rear Door Weatherstrip No. 5 LH
        *a A - A Cross Section *b Lip
      7. Covers are provided for the front door check assembly and rear door check assembly to block the check arm holes, reducing noise that enters from the outside to the cabin through the doors

        B00564SC01
        *1 Check Cover *2 Front Door Check Assembly LH
        *a A - A Cross Section - -
      8. A high level of damping sheet (front door silencer pad and rear door silencer pad) is used for the outer panel surface of the doors, ensuring superior NVH performance.

        B0056JCC01
        *1 Front Door Silencer Pad *2 Rear Door Silencer Pad
    7. Floor Panel Sheet Thickness Optimization


      1. Connecting rigidity and panel thickness are increased in areas close to passengers to suppress panel vibrations. As a result, superior riding comfort is ensured.


        • The toe board reinforcement (*1 in illustration) is connected to part of the rocker (front floor reinforcement (*2 in illustration)) to suppress panel vibrations.

        • The front floor pan (*3 in illustration) uses different thickness tailored blank material. The sheet thickness is increased where passengers place their feet to suppress panel vibrations.

        • The front floor panel CTR (*4 in illustration) uses different thickness tailored blank material. The sheet thickness is increased around the transmission to suppress panel vibrations.

        • Thick sheets are used in the dash panel sub-assembly (*5 in illustration) to suppress panel vibrations.

      2. A heavy underbody structure is used to achieve a low center of gravity and improve the sense of material quality. Also, steel cabin parts are used to achieve stable mode control during collisions.

        B0056OEC01
        *1 Toe Board Reinforcement RH *2 Front Floor Reinforcement RH
        *3 Front Floor Pan RH *4 Front Floor Panel CTR
        *5 Dash Panel Sub-assembly - -
        *a Tailored Blank Line *b Sheet Thickness: 1.2 mm (0.05 in.)
        *c Sheet Thickness: 0.7 mm (0.03 in.) *d Sheet Thickness: 1.4 mm (0.06 in.)