Fender Design - Wheel Arch Challenge

Fender Wheel Arch Challenge 

                                                      

Objective:              

• The main objective of the challenge is to calculate the Wheel Arch area and check whether the car passes the European standard.

Fender Wheel Arch:

• It is semi circular part positioned above the wheel of the car.
• It acts as a shield for wheel and protects passengers as well as the pedestrians from projection of water, stone and mud.
• There should be sufficient clearance between the wheel and fender wheel arch 
• If there is not a sufficient clearance then it will cause more chipping so it will harm both pedestrians and car.

Standards Follwed by the Automobile Industry:

1.Japanese Standard:

                                                              

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

 

2.US Standard:

                                                  

• 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

3.European Standard:

                                                                               

                                                                

• A Datum plane is created at the outermost part of the wheel.
• A Horizontal line is drawn from the center of axis of the wheel.
•  A Vertical Line is drawn from the center point and named SA
• Then Two lines SB and SC created at 30° from left and 50° Right from the vertical line SA respectively.
• Then a point from 150 mm from the horizontal line is taken and line SE is drawn.
• Using derived line command a center point between SC and SE lines taken and SD line is drawn.
• Measure the clearance L at sections SA-SA, SB-SB, SC-SC, SD-SD, SE-SE .
• At all the sections L value should be greater than 10mm to pass the european regulations.
• The value 'a' should be more than 5mm from the line 30° and 50° from the wheel center of axis.

                                                             

• The clearance between SA Line and wheel arc is 9.9531mm 

                                                           

• The clearance Between SB line and wheel arc is 10mm .

                                                        

• The clearance Between SC and wheel arc is 0.114986mm.

                                                   

• The Clearance between SD and wheel arc is 2.8482mm.

                                                   

• The Clearance between SE and wheel arc is 5.9018 mm

Measuring Value 'a' for Wheel Guard Requirment:

                                                     

• Clearance 'a' at 30deg line is 48.6195.

                                                   

• The clearance 'a' at 50deg line SC line is 43.3634.

 Conclusion:

Section	L (mm)	Result	a (mm)	Result
SA-SA	9.95	Fail	48.6	Pass
SB-SB	10	Pass
SC-SC	0.11	Fail	43.3	pass
SD-SD	2.84	Fail
SE-SE	5.90	Fail

•  Thus the above fender does not pass the European Regulations