Fender Design - Wheel Arch Challenge
Fender Design- Wheel Arch
Aim:
Calculate the Wheel Arch gap at required points and check whether the car passes the European standard.
Fender:
Fender covers a wheel, traditionally to prevent water and mud spray, but, is also for Aerodynamic purposes. When the vehicle is moving tyre picks up stones & others and hurl them in all directions thus in order to prevent pedestrians from these stone’s fender are used.
Types of Fenders:
- Full bumper type
- Half bumper type
Full bumper type:
It covers more area & Consumes material compared to half bumper .Scrap material is more compared to the half bumper.
Half bumper type:
It covers less area & consumes less material. Single sheet can be used to produce more than one bumper.
WHEEL ARCH AREA DEPENDS UPON THE VARIOUS REGIONAL REGULAION
- European regulation.
- Japanese regulation.
- US regulation.
European regulation:
- The Clearance ‘L’ should be measured at sections SA-SA/ SB-SB/SC-SC/SD-SD & SE-SE and create a clearance check chart to validate.
- In 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.
Japanese regulation:
- In Japanese regulation, the clearance ‘L’ for tire, hub, cap & fender is to be measured within area K and create a clearance check chart to validate.
- The value of L should be more excellent than 5.00 mm at all positions.
- Wheel guard requirement: The value of ‘a’ should be more than 5.00mm at line 30° forward & 50° rearwards from the central vertical axis of the wheel.
US regulation:
- In US regulation, the clearance ‘L’ is to be checked at all positions from -100° TO 100°. Degree divided into 100 & draw a line.
- The value of L should be greater than 5.00mm to satisfy the regulations.
- Wheel guard requirement: The value of ‘a’ should be more than 5.00mm at line 30° forward and 50° rearwards from the central vertical axis of the wheel.
Calculate the Wheel Arch gap at required points & check whether the car passes the European standard.
Given Data
We have to understand the European Regulation requirements
First, we define wheel centre & create perpendicular line & 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
L' value at section -SA:
L= 9.9489mm
L' value at section -SB:
L= 10.000mm
L' value at section -SC:
L= 3.2735mm
L' value at section -SD:
L= 0.245688mm
L' value at section -SE:
L= 3.3007mm
Below chart shows the Actual value of clearance between tire and wheel arch / wheel well
|
Measurement of point |
SA |
SB |
SC |
SD |
SE |
|
Nominal length |
10 |
10 |
10 |
10 |
10 |
|
Actual Length |
9.9489 |
10.000 |
3.2735 |
0.2456 |
3.3007 |
|
Remark |
FAIL |
PASS |
FAIL |
FAIL |
FAIL |
CONCLUSION
From the above results, we can conclude that the Fender does not pass the European Regulations