Fender Design - Wheel Arch Challenge

FENDER WHEEL ARCH CHALLENGE

FENDER WHEEL 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 passengers compartment and pedestarians from the projection of watr, mud and stones.The wheel arch area of the fender is usually designed as a cover or shield over the tyre along its perimeter to stop any debris or stones ,dirt,sand,snow,etc,from getting thrown into the vehicle or the BIW area as well as outside the vehicle and onto other vehicles or pedestarians on the road.For the vehicle to has its permit in different countries,the wheel arch of fenders must be compliant with the standards and regulations set by respective countries.

The European regulations requires a pre-determined clearance or a minimum distance of 10mm to be maintained between the fender and respective tyre at particular points, along the tyre profile as shown below:

FENDER ARCH REGULATION

In fender arch desigh there are 3 regulation requirment

1. Japanese Regulation Requirment
2. USA Regulation Requirment.
3. European Regulation Requirment

Japan Regulations :

• 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 .

USA Regulations :

• 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 .

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 .

Calculation of Wheel arch area according to European Regulations :

• A Datom plane is created at the outermost face fo the wheel .
• Horizontal and vertical line is created from the center of wheel and make it reference.
• Create 30 degree and 50 degree line with respect to vertical line .
• Now take ofset of 150mm from the horizontal line .
• Now create 5 point on plane and project it into the fender.
• Now measure the clearance 'L'.

Clearence Values

TABULATION

Conclusion :

• We have check the clearance value of 'L' and 'a' for the european standard .
• From the table we can say that section SB-SB pass and all other section fails .