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 .
Different fender regulation by different countries are as follow :
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 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 .
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 .
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'.
Calculating clearance at different points :
1) clearance 'L' at SA-SA :
L = 9.94mm
2) clearance 'L' at SB-SB :
L=10 mm
3) clearance 'L' at SC-SC :
L=0.29 mm
4) clearance 'L' at SD-SD :
L= 2.99 mm
5) clearance 'L' at SE-SE :
L = 5.99 mm
Measuring the clearance value 'a' for wheel guard requirement :
Clearance 'a' at 30 degree line :
a=49.64
Clearance 'a' at 50 degree line :
a=43.64
| SECTION |
L(> 10 MM) |
RESULTS | a(>5MM) | RESULTS |
| SA-SA | 9.94 | FAIL | ||
| SB-SB | 10 | PASS | 49.64 | pass |
| SC-SC | 0.29 | FAIL | 43.64 | pass |
| SD-SD | 2.99 | FAIL | ||
| SE-SE | 5.99 | FAIL |
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.