Fender Design - Wheel Arch Challenge

FENDER -WHEEL ARCH

FENDER- A fender is part of car that protects and frames its wheels and keeps mud from splashing it.Most modern vehicles have fenders on their front wheels.it is the part of a car ,truck or motor cycle that surrounds the wheel well.The primary function of a fender is prevent dirt and debris from being thrown into the air by the tire.

The fender is located over the wheels of the vehicle .As such there are fenders on a typical vehicle ,front right,front left and rear right and left also.

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 wheel arch of fender should be such that it must shield wheels and protect both passengers compartment and pedestrians from projection of water,mud and stones .
• For the vehicle to has its use permit in diffrent countries ,the wheel arch of fenders must be compliant with the standards and regulations set by the respective countries .

Types of fender-

The typee of fender is based upon the area covered -Full fender type and half fender type.

• Full fender type :-

Full fender type is traditional type of fender where more material consumption is observed .This type is used in old design of automobiles where it increases the overall weight and thus reduses [performance .The maintenance also relativelymore due to more surface.

• Half fender type:-

Half fender type is mordern design where less material consumption is observed ,so productivity increases by reducing size blank and thus providing more performance.The maintenance also relatively low compared to full bumper type.

JAPAN REQUIREMENTS FOR FENDER WHEEL ARCH

• Measure clearance 'L' of tire ,hub ,cap & fender in three diffrent position within area 'K' and produce clearance check chart to validate.
• Clearance must be greater than 5mm in all the three positions.
• Wheel gaurd requirement:- the value a shall be more than 5mm at 'A' line 30* forward and 50* rearward from the central vertical axis of axis off wheel.

US STANDARD REGULATION FOR FENDER WHEEL ARCH

• Make clearance check details on all positionS from - 100* TO 100* & make the clearance check table.
• All values should be greater than 5mm to satisfy the regulation .
• The value of 'a' shall be more than 5mm at .line 30* forward and 50* rearward from the central vertical axis of axis of wheel.

EUROPEAN REGULATION :-

Measure CL L at section SA-SA SB-SB SC-SC SD-SD SE-SE and produce CL check chart to validate

• At all five sections the CL L value should be greater than 10mm to satisfy the european regulations.
• Wheel gaurd requirement: the value of 'a' shall be more than 5mm at a line 30* forward and 50* rearward from the central vertical axis of wheel.

Procedures:-

• According to the european standards,the design fender and wheel arch should pass the wheel gaurd requirement procedures.

• To start the test ,first create a plane with orgin as center of the wheel plane .
• Then sketch using lines along with given dimensions as SA,SB,SC,SD and SE.

(SA) 9.9489MM

• After sketching the lines,use measurement simple measurement option tyto calculate the clearance between sketch line and wheel arc.
• The clearance between SA line and wheel arch is 9.9489mm also line SA lies the fender so it is positive value.

(SB) 10MM

• The clearance between SB line and wheel arc is 10mm also the lies inside the fender so it is positive value.

(SC) 0.1137MM

• The clearance between SC line and wheel arc is 0.1137mm also the line SC lies outside the fender so it is negative value.

(SD ) 4.4642mm

• The clearance between SC line and wheel arc is 4.4642mm also the line SC lies outside the fender so it is negative value.

(SE) 8.5665MM

• The clearance between SC line and wheel arc is 8.5665mm also the line SC lies outside the fender so it is negative value.

(WHEEL ARCH LENGTH) 1028.7044MM

• To calculate the wheel arch area,using measure function to calculate the wheel arch length by changing the length option and click the wheel arc which is 1028.7044mm.

( FACE OF WHEEL ARCH)

• Then measure the faces of wheel arc to calculate area which is 24432.9334mm^2.

Section	Calculated clearance (mm)	Minimum Clearance to pass (mm)	Pass /Fail
SA	9.9489 mm	10mm	Pass
SB	10 mm	10mm	Pass
SC	0.1137mm	10mm	Fail
SD	4.4642mm	10mm	Fail
SE	8.5665	10mm	Fail

Conclusion:

• Negative sign indicates that the wheel arch is behind the wheel
• All the section don't have the clearance value at least 10mm only SA and SB is seen to have value 10mm.
• Wheel arch area = 24432.9334mm^2.

Therefore the wheel arch does not satisfy the requirements as per the european standards. So the styling team needs to work at the section of SC,SD andd SE for safety purpose the wheel arch should be outside the wheel and the value greater than 10mm and SD ,SE part should come outside the wheel.