Fender Design - Wheel Arch Challenge

Aim:- Calculate the Wheel Arch gap at required points and check whether the car passes the European standard.

Wheel Arch:

Wheel arch is also known as Wheel well. The wheel arch is the semi-circular part positioned above the wheel of a vehicle. Wheel arch is a part of fender and Curvature in shape. While designing Wheel arch it should be in mind that the wheel should be inside the fender.

As we see car from front if wheel is outside the fender, then it causes lot of damage to pedestrian and also to the car so wheel should be under the fender.

Regulation of Wheel arch:

There are different regulation requirements for different country as follow. The regulation is fixed with respective the road of specific region (Country) by government.

1. Japan regulation

Japan requirement

To measure the Clearance between tire , hub , & fender is L

The value of L should be more than 5mm if L<5 then Vehicle will not pass under Japan regulation

As shown in above diagram value of ‘SA’ At centre & ‘SB’ , ‘SC’ should be more than 5mm at the line 30* forward and 50* reward respectively from the central vertical axis of wheel.

2.European Regulation

European requirements

To measure the Clearance between tire, hub, & fender is L

The value of L should be more than 10mm if L<10 then Vehicle will not pass under Japan regulation

As shown in above diagram value of ‘SA’ at centre & ‘SB’ , ‘SC’ should be more than 10mm at the line 30* forward and 50* reward from the central vertical axis of wheel. Here we have made another 2 points to be measure that will be SD & SE is also more 10mm

We have to Calculate the Wheel Arc area and prove whether the car will pass the standards or not under European Regulation

First of all, we have to understand the European Regulation requirements

First, we define wheel centre and create perpendicular line and project vertical line to top view this Point will be ‘A’. Then to find point B we make 30* angle to forward and 50* reward, at 150mm offset of horizontal line then mark SD and SE points

The value of clearance at ‘SA’ at centre & ‘SB’, ‘SC’ should be more than 10mm at the line 30* forward and 50* reward from the central vertical axis of wheel. Here we have made another 2 points to be measure that will be SD & SE is also more 10mm

Below chart shows the Actual value of clearance between tire and wheel arch / wheel well

Measurement of point	SA	SB	SC	SD	SE
Required length	10	10	10	10	10
Actual Length	9.9490	10	2.5563	2.8875	5.9973
Remark	FAIL	PASS	FAIL	FAIL	FAIL

Conclusion:

AS per European regulation requirements the clearance at give point should be minimum 10mm, more than 10mm can be accepted but at only one point there is 10mm clearance and other point clearance value is less than 10mm so the car will not pass the standards. the design of fender needs to modify