Fender Design - Wheel Arch Challenge

Aim:

To calculate the Fender Wheel Arc area , to pass the European standards. Objective: Create the intersection point according to given degree angle. Follow the European standards to prove the design is valid.

Objective:

• Create the intersection point according to given degree angle.
• Follow the European standards to prove the design is valid.
• Tabulate the result to conculde the final result.

Introduction:

Fender is the American English term for the part of an automobile, motorcycle or other vehicle body that frames a wheel well (the fender underside). Its primary purpose is to prevent sand, mud, rocks, liquids, and other road spray from being thrown into the air by the rotating tire. Fenders are typically rigid and can be damaged by contact with the road surface.

Sticky materials, such as mud, may adhere to the smooth outer tire surface, while smooth loose objects, such as stones, can become temporarily embedded in the tread grooves as the tire rolls over the ground. These materials can be ejected from the surface of the tire at high velocity as the tire imparts kinetic energy to the attached objects. For a vehicle moving forward, the top of the tire is rotating upward and forward, and can throw objects into the air at other vehicles or pedestrians in front of the vehicle

Fender Wheel Arch Regulations:

Japan Regulations

• The clearance ‘L’ for tire, hub, cap and fender is to be measured within area K and create clearance check chart to validate
• The value of L should be greater than 5mm at all positions
• Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel

European Regulations

• The Clearance ‘L’ should be measured at sections SA-SA, SB-SB, SC-SC, SD-SD and SE-SE and create clearance check chart to validate
• At all the five sections the value of L should be greater than 10mm to satisfy the European Regulations
• Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel

US Regulations

• Clearance ‘L’ is to be checked at all positions from -100° to 100° and create clearance check chart to validate
• The value of L should be greater than 5mm to satisfy the regulations
• Wheel guard requirement: The value of ‘a’ should be more than 5mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel.

Measurements are based on the sketch provided below:

Sketch

Determining the clearence values:

Clearence value for SB = 10.000mm

Clearence value for SA = 9.9490mm

Clearence value for SC = 0.113949mm

Clearence value for SD = 6.6972 mm

Clearence value for SE = 14.8713 mm

Region	Required clearance	Actual clearance	Results
SA	10mm	9.9490mm	FAIL
SB	10mm	10.000mm	PASS
SC	10mm	0.11394mm	FAIL
SD	10mm	6.6972mm	FAIL
SE	10mm	14.8713mm	FAIL

Conclution:

From the above results we can conclude that the fender does not pass the European regulations,as the minimum clearance L between the fender wheel arch and wheel for vehicle and pedestrian safety is lOmm and this design does not meet the requirement.