Fender Design - Wheel Arch Challenge

AIM:-

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

WHEEL ARCH:-

The wheel arch is the semicircular part positioned above the wheel of a vehicle. The most important body change was that the front wheel arch was cut higher into the fender. Corrosion had occurred around the splash plate at the back of the wheel arch.

The design of the wheel arch of the fender should be such that it must shield wheels and protect both passenger ad padestrian from the projection of stone and mud.

For the vehicle to has different permit in different cuountries, 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 follows :

1.JAPAN REQUIREMENTS FOR FENDER WHEEL ARC:-

1. Measure clearance L of tire, hub, cap, and fender in three different positions within area K and produce a clearance check chart to validate.
2. Clearance must be greater than 5mm in all three positions.
3. Wheel guard requirement: the value shall be more than 5mm at a line 30*forward and 50*rearward from the central vertical axis of the wheel.

2.US STANDARDS REGULATION FOR FENDER WHEEL ARC:-

1. Make clearance check details on all positions from -100* to 100* and make the clearance check table.
2. All values of L should be greater than 5mm to satisfy the regulation.
3. The value of ‘a’ shall be more than 5mm at line 30* forward and 50*rearward from the central vertical axis of wheel.

EUROPEAN REGULATION:-

1. The european regulation requires a pre- determined clearance or a minimum distance of 10 mm to be maintained between the fender and respective tyre at particular points, along the tyre profile as shown below.
2. 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 Datum plane is created at the outermost face of 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 offset 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:

• Clearance 'L' at SA-SA : L = 9.9490mm

• Clearance 'L' at SB-SB: L = 10.000mm

• clearance 'L' at SC-SC : L= -0.1139mm

• clearance 'L' at SD-SD : L = -2.8875mm

• clearance 'L' at SE-SE : L = -5.9973

Measuring the clearance value 'a' for wheel guard requirement:

Clearance 'a' at 30 degree line:

a = 43.8827mm

Clearance 'a' at 50 degree line:

a = 38.6471mm

SECTION	L(> 10 MM)	RESULTS	a(>5MM)	RESULTS
SA-SA	9.9490mm	FAIL
SB-SB	10.000mm	PASS	43.8827mm	pass
SC-SC	-0.1139mm	FAIL	38.6471mm	pass
SD-SD	-2.8875mm	FAIL
SE-SE	-5.9973	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.