Fender Design - Wheel Arch Challenge

AIM

Calculate the wheel arch gap at required points and check whether the car passes the european standard

FENDER WHEEL ARCH

Wheel arch is semi circular in shape which is placed above all the wheels .Its design is in such a way that to avoid the sand, mud, small rock stones and other road particles from being thrown into the air to hit engine compartment and the pedestrain.There might be some terms and conditions and it may varry depending upon the region,it include the clearance and some area ot the wheel arch would behind thee wheel and vice versa

VARIOUS STANDARDS FOR WHEEL ARCH DESIGN

1. 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 30degree forward and 50degree rearwards from the central vertical axis of the wheel.

2.US regulations:

• Clearance "L" is to be checked at all positions from -100degree to 100degree 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 30degree forward and 50degree rearwards from the central vertical axis of the wheel.

3.European standards:

• 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 30degree forward and 50degree rearwards from the central vertical axis of the wheel.

STEPS FOR CREATING SKETCH SIMILAR TO EUROPEAN STANDARDS :

1. open the given part file and create the datum plane on the outermost flat surface of the wheel as shown below

2.On the plane using sketch option,draw a horizontal line.On left side to the horizontal line draw another inclined line at an angle of 30 degree ,similar at right hand side draw an

inclined line at an angle of 50 degree.

3.project the bottom wheel arch edge on that plane then offset the horizontal line to 150mm.make a point at the intersection then draw an inclined line which passes through the intersection point to the wheel centre.draw a bisecting line between rhese two points using derived lines.then make the intersection points on the curve at all the lines.

4.using project curve option,project the wheel arch curve and those five points to that dody faces.then finally measure the distance between two points between the

plane and the wheel arch face.the measurement are made according to the european standards.

similarly ,measure all the distance at intersection point

for "L" values

SB-SB = +10.000 mm

SA-SA = + 9.9490mm

SC-SC = +1.6293 mm

SD-SD = -2.8875 mm

SE-SE = - 5.9973 mm

for "a" values

SB = 43.6263mm

SC = 38.3597mm

And the results are tabulated which is given below

SECTION	L(>10MM)	RESULT	a(>5MM)	RESULT
SA-SA	+ 9.9490	FAIL
SB-SB	+10.000	PASS	43.6263	PASS
SC-SC	+1.6293	FAIL	38.3597	PASS
SD-SD	-2.8875	FAIL
SE-SE	- 5.9973	FAIL

Conclusion :

From the above results we can conclude that the Fender does not pass the European Regulations as the minimum clearance between the fender arch wheel to the outer most wheel is 10 mm and this design does not meet the this minimum clearance so this fender design is fail for the European Regulation standard.