Fender Design - Wheel Arch Challenge

Aim : To Calculate the Wheel Arch gap at required points and check whether the car passes the European standard.

Fender Arch :

• Wheel arch is the semi circular part of the fender positioned above the wheel of the vehicle .
• The design of the wheel arch of the fender should be such that it must shield wheels and protect both passanger and padestrian from the projection of stone and mud.
• For the vehicle to has different permit in different countries , the wheel arch of fender must be compliant with the standard and regulation set by respective countries.

STANDARDS FOR WHEEL ARCH

European Standard :

• The european regulation requires a pre- determined clearance or a minimum distance of 10 mmm to be maintained between the fender and respective tyre at particular points, along the tyre profile as shown below .
• Wheel guard requirement : The value of 'a' should be more than 5 mm at line 30 degree forward and 50 degree reward from the central vertical axis of the wheel .

US Standards :

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

Japan Standard :

• The clearance 'L' for is to be measured within area K and create clearance check chart to validate .
• The value of L should be greater than 5 mm at all point .
• Wheel guard requirement : The value of a should be more than 5 mm at line 30 degree forward and 50 degree reward from the central vertical axis of the wheel .

We have to check the clearances as per European Standards.

Clearance Calculations:

Clearance 'L' at SA-SA :

L = 9.9489mm

Clearance 'L' at SB-SB :

L = 10.000mm

Clearance 'L' at SC-SC :

L = 0.1137mm

Clearance 'L' at SD-SD :

L = 2.8817mm

Clearance 'L' at SE-SE :

L = 5.9755mm

RESULT:

From the above observations the positions SA SC SD SE are less than 10mm which is necessary to pass the European standards. Hence, the front fender wheel arch does not pass the European standard.