Fender Design - Wheel Arch Challenge

AIM

Calculate the Wheel Arc area and prove whether the car will pass the Eurropean standards or Not.

INTRODUCTION

• 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.

• There are many factors are to be considered when designing a Fender and one of them is Wheel Arch.
• While designing the Fender the considerations for different standard of the Wheel Arc must be taken care.

Fig- Wheel Arch area consideration

Study of different Types of Regulations:

- Different country follow different standards according to there requirement such as goverment regulations, road conditions, climate, geography and various other factor.

- Importance of Wheel Arch area regualtion is to maintain certain space between between top of the Tire and Fender while designing.

-Here we are going to study three different standards for our Wheel Arch calculation.

• Japan
• US
• Europe

1. Japan Standards

• Measure clearance L of the tire, hub, cap and fender in three different position within area K and produce claerance check chart to validate.
• Clearnce must be greater than 5mm in all three position (i.e. A, B, C from fender curvature)
• Wheel guard requirement: The value of 'a' shall be more thasn 5mm at line 30* forward and 50* rearward from the central vertical axis of the wheel.

• 

2. European Standards

• Measure clearance L at sections SA-SA, SB-SB, SC-SC, SD-SD, SE-SE and CL check chart to validate.
• In all five sections, the clerance L value should be grearter than 10 mm to satisfy European regulations.
• Wheel guard requirement: The value of 'a' shall be more than 5mm at line 30* forward and 50* rearward from the central vertical axis of the wheel.

3. US Standards

• Make clearance check details on all positions from -100* to 100* and make clearnce check table.
• All value should grater than 5 mm to satisfy the regulations.
• Wheel guard requirement: The value of 'a' shall be more than 5mm at line 30* forward and 50* rearward from the central vertical axis of the wheel.

CALCULATE WHEEL ARCH ACCORDING TO EUROPEAN STANDARDS

- We will examine the given Fender design according to the European standard given below

- Next will start constructing the points of measurements at different angle for the wheel arch.

- Afterwards we will note diffrent clearence values:

• SA = 9.949 mm
• SB = 10 mm
• SC = .113 mm
• SD = 2.682 mm
• SE = 5.543 mm

- Checking whether the front fender Wheel Arch meets the standards:

Position	Study Clearnce Value (MM)	Required Clearance value (MM)	Passes The Requirement
SA	9.949	10	No
SB	10	10	Yes
SC	0.113	10	No
SD	2.682	10	No
SE	5.543	10	No

CONCLUSION

Hence from the above study, since positions SA, SC, SD and SE have a clearance less than 10mm which is the minimum requirement for the European regulations from that it is clear that front fender wheel arch area does not pass the European regulations.