BODY STRUCTURE


  1. FUNCTION


    1. Impact Absorbing Structure for Frontal Collision


      1. The front end of the rocker protrudes forward (*c in illustration) to ensure an impact absorption area, receive impact energy from the front tires during frontal collisions and direct the front tires outwards (*d in illustration), suppressing cabin body deformation.*

        Tech Tips

        *: The deformation mode when the vehicle is in a frontal collision where the front end of the vehicle collides with a thin object (approximately 1/4 of the total width), such as a tree or utility pole.

      2. The front body pillar outer reinforcement has a 2 part structure in the front and rear (*a in illustration), and bulkheads (*4 and *5 in illustration) are positioned inside it. As a result, cabin body deformation due to energy input from the tires during frontal collisions is suppressed.

      3. Ultra high-tensile strength steel (tensile strength: 1180 MPa class) is used in the rocker outer reinforcement (fender panel inner (*8 in illustration)). As a result, cabin body deformation from vehicle pitching during frontal collisions is suppressed using a lightweight body structure.

        A004DOMC01
        *1 Front Body Pillar Lower Hinge Retainer LH *2 Front Body Pillar Reinforcement Upper Out No. 2 LH
        *3 Front Body Pillar LWR Outer FR LH *4 Front Body Pillar Retainer LWR INNER LH
        *5 Front Pillar Extension LWR LH *6 Front Body Pillar Reinforcement LWR LH
        *7 Front Body Pillar Upper Hinge Retainer Holder LH *8 Fender Panel Inner LH
        *a A - A Cross Section *b B - B Cross Section
        *c Protruding Section at Front End of Rocker (Impact Absorption Area) *d Tires Directed Outwards during Frontal Collision
        A004DXH

        Ultra High-tensile Strength Steel

        (Tensile Strength: 1180 MPa Class)

        		 A004D8M

        Ultra High-tensile Strength Steel

        (Tensile Strength: 980 MPa Class)
        A004E2A

        High-tensile Strength Steel

        (Tensile Strength: 590 MPa Class)

        		 A004DTZ Front Impact Energy
        A004DYG Dissipate - -

      4. A front bumper reinforcement sub-assembly (*1 in illustration), which is highly resistant to warping, is used. It efficiently spreads impact energy received during a frontal collision to the opposite side of the vehicle and dissipates impact energy to body parts to increase the amount of impact energy that is absorbed in the engine compartment.

      5. A wide crush box (front bumper mounting reinforce sub-assembly (*2 in illustration)) is used and a gusset (outrigger gusset No. 1 (*3 in illustration)) is provided to ensure superior initial collision energy absorption in various types of collisions.

        A004DEQC01
        *1 Front Bumper Reinforcement Sub-assembly *2 Front Bumper Mounting Reinforce Sub-assembly LH
        *3 Outrigger Gusset No. 1 LH - -
        *a A - A Cross Section *b B - B Cross Section
        *c Wide Crush Box - -

      6. A multi-load path body structure, which dissipates input load along multiple paths, is used to absorb impact energy during frontal collisions, ensuring superior safety.


        1. The load received by the front bumper reinforcement sub-assembly (*1 in illustration) during a collision dissipates to the front side member assembly (*3 in illustration) through the front bumper mounting reinforce sub-assembly (*2 in illustration).

        2. The load received by the front bumper reinforcement sub-assembly (*1 in illustration) during a collision dissipates to the outrigger No. 2 (*4 in illustration) and outrigger No. 1 (*5 in illustration) through the front bumper mounting reinforce sub-assembly (*2 in illustration).

        3. The load received by the front bumper reinforcement sub-assembly No. 2 (*6 in illustration) during a collision dissipates to the rear frame rail sub-assembly (*7 in illustration), frame crossmember sub-assembly front (*8 in illustration) and lower arm mounting reinforcement sub-assembly rear (*9 in illustration).

          A004DA6C01
          *1 Front Bumper Reinforcement Sub-assembly *2 Front Bumper Mounting Reinforce Sub-assembly LH
          *3 Front Side Member Assembly LH *4 Outrigger No. 2 LH
          *5 Outrigger No. 1 LH *6 Front Bumper Reinforcement Sub-assembly No. 2
          *7 Rear Frame Rail Sub-assembly LH *8 Frame Crossmember Sub-assembly Front
          *9 Lower Arm Mounting Reinforcement Sub-assembly Rear LH *10 Cowl Top Side Panel LH
          *11 Front Apron to Cowl Side Member Plate LH *12 Front Side Member Reinforcement No. 5 LH
          A004DTZ Front Impact Energy - -

      7. A torque box with a large cross section (C in illustration), a strengthened connection between the torque box and dash cross member (D in illustration), and a member rear with a large cross section (E in illustration) are provided to increase cabin strength and ensure superior safety during collisions. These structures also improve body rigidity.

        A004DFRC01
        *1 Dash Panel No. 2 *2 Torque Box FR LH
        *3 Torque Box FR No. 2 LH *4 Front Floor Pan LH
        *5 Dash Panel Sub-assembly *6 Front Side Member Inner LH
        *7 Front Side Member Plate Outer LH *8 Front Side Member Plate Outer LH
        *a A - A Cross Section *b B - B Cross Section

    2. Impact Absorbing Structure for Side Collision


      1. Ultra high-tensile strength steel (tensile strength: 980 MPa class) and high-tensile strength steel (tensile strength: 590 MPa class) are used in the body frame, achieving weight reduction and structure simplification while ensuring strength.


        1. High-tensile strength steel (tensile strength: 590 MPa class) is used in the center body pillar reinforcement UPR (*14 in illustration), center body pillar inner (*11 in illustration) and belt anchor to center pillar reinforcement (*12 in illustration). Furthermore, ultra high-tensile strength steel (tensile strength: 980 MPa class) is used in the center pillar upper hinge reinforcement No. 2 (*13 in illustration), which is positioned on the inner side of the center body pillar reinforcement UPR.

        2. High-tensile strength steel (tensile strength: 590 MPa class) is used in the roof side rail UPR (*1 in illustration) and roof side rail inner (*3 in illustration). High-tensile strength steel (tensile strength: 590 MPa class) is also used in the roof side rail gusset RR (*2 in illustration), which is positioned on the inner side of the roof side rail UPR (*1 in illustration).

        3. Ultra high-tensile strength steel (tensile strength: 1180 MPa class) is used in the fender panel inner (*8 in illustration).

        4. Ultra high-tensile strength steel (tensile strength: 1180 MPa class) is used in the roof panel reinforcement (*16 in illustration).

      2. The bulkhead (floor side member reinforcement No. 1 (*5 in illustration), floor side member reinforcement No. 2 (*6 in illustration) and rocker panel reinforcement No. 6 (*7 in illustration)) is positioned inside the fender panel inner (*8 in illustration) to suppress rocker cross sectional collapse. As a result, center body pillar intrusion during collisions is suppressed.

        A004DHZC01
        *1 Roof Side Rail UPR LH *2 Roof Side Rail Gusset RR LH
        *3 Roof Side Rail Inner LH *4 Rocker Panel Reinforcement No. 1 LH
        *5 Floor Side Member Reinforcement No. 1 *6 Floor Side Member Reinforcement No. 2
        *7 Rocker Panel Reinforcement No. 6 LH *8 Fender Panel Inner LH
        *9 Rocker Panel Reinforcement No. 5 LH *10 Side Panel Outer No. 2 LH
        *11 Center Body Pillar Inner LH *12 Belt Anchor to Center Pillar Reinforcement LH
        *13 Center Pillar Upper Hinge Reinforcement No. 2 *14 Center Body Pillar Reinforcement UPR LH
        *15 Center Pillar Lower Hinge Reinforce No. 2 *16 Roof Panel Reinforcement
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section - -
        A004DTZ Side Impact Energy A004DYG Dissipate

    3. Roof Crush Resistance


      1. High-tensile strength steel (tensile strength: 440 MPa class) is used in the front header (windshield header panel outer (*1 in illustration)) and high-tensile strength steel (tensile strength: 590 MPa class) is used in the front body pillar reinforcement UPR INNER RH (*2 in illustration), front body pillar reinforcement UPR INNER LH (*4 in illustration) and windshield header panel inner (*3 in illustration) to ensure superior roof strength.

      2. High-tensile strength steel (tensile strength: 590 MPa class) is used in the roof center reinforcement (roof panel reinforcement RR (*5 in illustration)) and ultra high-tensile strength steel (tensile strength: 1180 MPa class) is used in the roof panel reinforcement (*6 in illustration) to ensure superior roof strength.

        A004E30C01
        *1 Windshield Header Panel Outer *2 Front Body Pillar Reinforcement UPR INNER RH
        *3 Windshield Header Panel Inner *4 Front Body Pillar Reinforcement UPR INNER LH
        *5 Roof Panel Reinforcement RR *6 Roof Panel Reinforcement
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section - -