Fender Design - Wheel Arch Challenge

FENDER:

   It is the part of an vehicle body that frames a wheel well. Its primary purpose is to prevent sand, mud, rocks, liquids, and other road spray from being thrown into the air by the rotating tire. For a vehicle moving forward, the top of the tire is rotating upward and forward, and can throw objects into the air at other vehicles or pedestrians in front of the vehicle.

WHEEL ARCH:

  For preventing from above incidents, fender arch comes into an effect. For avoiding pedestrians injury wheel is positioned inside the fender.

FENDER WHEEL ARCH REGULATIONS:

     Every region there are different regulations on the globe for the pedestrians safety.

Janpanesh Regulation:

• Measure clearance L of tire, hub, cap & fender in three different positions within area of K and produce clearance check chart to validate
• In japanese region the gap between the wheel and fender should be greater than 5mm in al 3 region (A,B,C).

European Regulation:

• Measure clearance L at SA, SB, SC, SD & SE and produce clearance check chart to validate.
• All values should be greater than 10 mm in all positions, otherwise ask fender engineer to correct the curvature of the fender.

  

US Regulation:

• Measure clearance check details on all positions from -100 to 100 and make the clearance check chart.
• All values should be greater than 5mm to satisfy the regulation.

AT 90 DEG (SA) L Measurement:

AT 30 DEG (SB) Measurement:

AT 50 DEG (SC) Measurement:

AT BETWEEN POINT (SD) Measurement:

AT 150 MM FROM 0 DEG (SE) Measurement:

Clearence chart for all 5 Measurements:

SL. NO     POINT      REQUIRED VALUE(MM)    MEASURED VALUE(MM)   REMARK

    1             SA                        10                                      9.942                    FAIL

    2             SB                        10                                       10                       PASS

    3             SC                        10                                 -0.111414                  FAIL

    4             SD                        10                                  -2.8891                    FAIL

    5             SE                        10                                   -5.9973                    FAIL

CONCLUSION:

      From the european standard regulations all the length value of the fender to wheel should be 10 mm. But from the above result the fender is failed to satisfy the regulation. We got only one value as correct for SB section, Remaining 3 values (SC,SD&SE) we get on negative side. So we ask the fender engineer to modify this design as per european regulations.

Thanks.