Fender Design - Wheel Arch Challenge

OBJECTIVE:

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 FOLLOWED BY DIFFERENT COUNTRY:

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.
• 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 REGULATION:

• 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 REGULATION:

• 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.

CALCULATING WHEEL ARCH GAP ACCORDING TO EUROPIAN STANDARD,

I created a skech from the given skin data,

1.Calculating value of clearence (L) at SA:

L=9.9490mm

2.Calculating value of clearence (L) at SB:

L=10mm

3.Calculating value of clearence (L) at SC:

L=.113949mm

4.Calculating value of clearence (L) at SD:

L=2.8875mm

5.Calculating value of clearence (L) at SE:

L=5.9973mm

OBSERVATION TABLE:

THE THRESHOLD VALUE OF L IS 10 MM,

SECTION	CLEARENCE IN MM	REMARK
SA	9.9490 mm	FAIL
SB	10 mm	PASS
SC	.113949 mm	FAIL
SD	2.8875 mm	FAIL
SE	5.9973 mm	FAIL

From the above table ,we conclude that the fender couldn't pass european standard .

DETERMINE THE WHEEL GUARD CLEARENCE (A):

• CLEARENCE 'a' AT 30 DEGREE LINE

a = 48.6263 mm

• CLEARENCE 'a' AT 50 DEGREE LINE:

a = 43.3595 mm

THE THRESHOLD VALUE OF 'a' IS 5 MM,

Thus from above data the wheel guard clearance 'a'passes european standard.

CONCLUTION

After analysing the overall data ,we conclude that the car doesn't pass the european standard.