Fender Design - Wheel Arch Challenge

WHEEL ARC CALCULATION

OBJECTIVE:

Calculate the wheel arc radius for the given Fender Using the European Standards Discussed.

Theory:

Fender Design

• Primary purpose to avoid sand, mud rock, liquid and other particle to be thrown in air due to rotation of wheel.
• Fender avoid motion of road particle to be thrown to pedestrain and to contain motion of these particles.
• Fender skirts are used to enclose outside edge of wheel well.
• Fender is avoids hitting inside engine compartment of road particle due to motion of wheel.

Types of Fenders:

• Full Bumper Type
• Half Bumper Type

Now a Days Full Bumper Type is Not Used. Because they need more blank Size Compared to Half Bumper Type which need more Scrap needs to be Produced.

In Half Bumper with this we can accommodate Two fender in one bland which results in lesser Scrap.

In Half Bumper we can use the plastic part which will reduce the weight and part.

For wheel arc calculation there are 3 Standards

1.Japan Standard

For japan standard Clearance value L should not be less than 5 mm at all 3 Conditions.

2.

Clearance value L should not be less than 10 mm at all 5 Conditions. if its value fall under 10 mm, Stylling Engineering Should change the Curvature of the Fender.

3.US Standards:

Clearance distance should not be less than 5 mm at for every 10 degree Angle about overall 180 degree.

PROCEDURE FOR EUROPEAN REGULATION:

• First create the plane on the face of the wheel and create straight line in verticle direction from the center of the wheel name it as SA
• Create line at 30 degree left side of SA
• Again create line at 50 degree right side of SA
• Now create horizontal line passing through the Center of wheel, and create 150 mm in upward direction and identify the point of intersection with the edge of wheel.
• Draw an line passing through center of wheel and intersection point, create angle bisector using bisecting line option available in lines name them as SD and SE.
• Finally Exist the Sketch use measure tool and measure distance between line and fender outer edge.

Conclusion:

From the above data

• Here Clearance value of all Standards lines are not satisfied except SB.
• For satisfying clearance L value should be greater than or equal to 10 mm then only fender design gives safety factor to car and pedestrains also.

So that we should provide this as feedback to style engineering who will correct the curvature of the fender by increasing curvature value more than 10 mm