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  1. Home/
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  3. Fender Design - Wheel Arch Challenge

Fender Design - Wheel Arch Challenge

aim - Calculate the Wheel Arch gap at required points and check whether the car passes the European standard. Fender Fender is a part of an automobile, motorcycle or other vehicle body that frames a wheel well (the fender underside). Its primary purpose is to prevent…

    • Sumit Nema

      updated on 04 Nov 2022

    aim - Calculate the Wheel Arch gap at required points and check whether the car passes the European standard.

    Fender

    Fender is a part of an automobile, motorcycle or other vehicle body that frames a wheel well (the fender underside). Its primary purpose is to prevent sand, mud, rocks, liquids, and other road spray from being thrown into the air by the rotating tire. Fenders are typically rigid and can be damaged by contact with the road surface.

    The main purpose of fenders on cars is that they shield the wheels and they protect the passengers, the pedestrians, and the other vehicles from stones, mud, liquid, and other debris that can fly in the air because of the speeding rotating wheels while the car is running.

    Wheel Arch

    • It is a curved part of the Fender positioned right above the Wheel.
    • The Wheel Arch is designed such that it protects both the pedestrian and car cabin from mud, water rocks and other road spray
    • Different countries have different wheel arch regulations in place, and the wheel arch design has to comply with them to be deemed usable in that country.
    • For avoiding design alterations of the same vehicle to meet the different regulations in different countries, the maximum values of the concerned regulation parameters are taken into consideration for design purpose.

    Fender Wheel Arch Regulations

    Japan Regulations

     

    • The clearance ‘L’ for tire, hub, cap and fender is to be measured within area K and create clearance check chart to validate
    • The value of L should be greater than 5mm at all positions
    • Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel

    European Regulations

     

    • The Clearance ‘L’ should be measured at sections SA-SA, SB-SB, SC-SC, SD-SD and SE-SE and create clearance check chart to validate
    • At all the five sections the value of L should be greater than 10mm to satisfy the European Regulations
    • Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel

    US Regulations

     

    • Clearance ‘L’ is to be checked at all positions from -100° to 100° and create clearance check chart to validate
    • The value of L should be greater than 5mm to satisfy the regulations
    • Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel

    • Measuring all the five Sections for CLEARANCE
    • AT SC SECTION

    Clearance Obtained -0.114mm

    AT SE SECTION

     

    Clearance Obtained -5.988mm

     

    AT SD SECTION

    Clearance Obtained -2.879mm

    AT SB SECTION

    Clearance Obtained 10mm

     

    AT SA SECTION

     

    Clearance Obtained 10mm

    Here, the negative sign indicates that the wheel arch is out of fender.

    Hence by looking at the results obtained above, it can be concluded that the car will not pass the required standards in Europian Region.

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