Fender Design - Wheel Arch Challenge

WHEEL ARCH FENDER DESIGN CALCULATION:

Aim :

To calculate the wheel arch gap at critical points and check whether the car passes the European standard.

Objective :

Study the wheel arch calculation between the wheel and wheel arc fender.
Draw the lines at the required angle and points for the European standard.
Measure the distance at each angle and mention whether the given model is pass or fail.

Fender :

A Fender is a part of an automobile or other vehicle body that frames a wheel as well (the fender underside). Its primary purpose is to prevent sand, mud, rocks, liquids, etc.,

Fenders are typically rigid and can be damaged by contact with the road surface.

The main purpose of fenders on cars is that they shield the wheels and they protect the passengers, pedestrians, and other vehicles from stones, mud, liquid, and other debris that can fly in the air because of the speeding rotating wheels while the car is running.

WHEEL ARCH

It is a curved part of the fender positioned right above the wheel.
The wheel Arch is designed such that it protects both the pedestrian and car cabin from mud, water rocks, and other road spray.
Different countries have different wheel arch regulations in place, and the wheel arch design has to comply with them to be deemed usable in that country.

For avoiding design alterations of the same vehicle to meet the different regulations parameters are taken into consideration for design purposes.
Fender Wheel Arch Regulations

Japan Regulations
European Regulations
US Regulations

Japan Regulations

US Regulations

European Regulations

Calculations of wheel Arch area - European Regulations:

Create a datum plane in the wheel position.
Then draw the line along with the given European standard angles.
Using rapid dimension to give measurements to the wheel arch design.
After completing the wheel arch sketch, then project it to the wheel arch fender design skin data.
then using the measurement instruments to measure the gap between the wheel arch and the wheel.
Obtaining the clearance L at the designated 4 points

The clearance distance 'L' is calculated at points Section A,B,C,D which should be greater than or equal to 10mm

And also measure A distance on every section A,B,C,D which is equal to or greater that 5mm

• Calculate the Wheel Arch gap at required points and check whether the car passes the European standard or not.

L/A Distance	Section A	Section B	Section C	Section D
L Distance	10mm	-2.6240mm	-1.2394mm	-5.8464mm
A Dictance	46.2594mm	34.1760mm	40.3040mm	48.7164
Remark (L Distance)	Passes the European standard	Not passes the European standard	Not passes the European standard	Not passes the European standard
Remark (A Distance)	Passes the European standard	Passes the European standard	Passes the European standard	Passes the European standard

L/A Distance	Section A
L Distance	10mm
A Dictance	46.2594mm
	In section A (L/A distance) is passes the European Standard

L/A Distance	Section B
L Distance	-2.6240mm
A Dictance	34.1760mm
	In section B (L distance) is not passes the European Standard
	In section B (A distance) is passes the European Standard

L/A Distance	Section C
L Distance	-1.2394mm
A Dictance	40.3040mm
	In section C (L distance) is not passes the European Standard
	In section C (A distance) is passes the European Standard

L/A Distance	Section D
L Distance	-5.8464mm
A Dictance	48.7164mm
	In section D (L distance) is not passes the European Standard
	In section D (A distance) is passes the European Standard

By Calculate the Wheel Arch gap we find that only (section A) is passes the European Standard And Section B,C,D is not passes the European Standard.

So i send this styleing suface to styling team to make a correction in this so that this will passes the European Standard.