Fender Design - Wheel Arch Challenge

AIM:

• To study the Europe ,Japan & US regulations for pedestrians saftey while designing fender wheel arch.
• To analyse the given fender wheel arch is passing Europe standards using NX software.

Fender:

Fender is part of an automobile which is assembled to protect the pedestrians and passengers and other parts of the automobile body from muds stones and other debrisis thrown from tire of the car.

Fender - Wheel Arch:

• Certain gap is maintained between tire and fender which is to prevent debris thrown from tire doesn't affect pedestrians and passengers.
• This gap is called wheel arch gap.
• The gap sholud be maintained which is necessary for suspension system and turning radius.
• Europe,Japan and US has developed standards for maintaining gap between fender and wheel.

Japan:

• In Japan,from the wheel center 30 degree from centre and towards frontal area & 50 degree angle from center towards rear end ,two points are marked.
• In marked areas,the gap should be minimum atleast 5 mm from the fender to the outer edge of the wheel.

Europe Standard:

• In Europe,from the wheel center 30 degree from centre and towards frontal area & 50 degree angle from center towards rear end ,two points are marked.
• From neutral axis,a point with 150mm distance from horizontal reference line is marked.
• Between theses two ponts, a bisecting line is formed.
• In marked areas,the gap should be minimum atleast 10 mm from the fender to the outer edge of the wheel.

US standard:

• In US Standard,from the wheel center -20 degree from centre & 180 degree angle from center towards rear end ,at every 10 degree all the gaps from wheel arc to fender, all the gaps should be minimum atleast 5 mm.

Analysing Wheel Arch area:

At section SB,

At Section SC,

At section SE,

At Section SD,

S NO	POSITION	DISTANCE
1	SB	10mm
2	SC	0.7776
3	SD	-2.815(Outside the fender)
4	SE	-5.9018(Outside the fender)

Wheel is in negative area side i.e., wheel is in outside the fender in the SE & SD region.So it does not pass the Europe standard.

From these images,It may not passes the Europe Standard regulations but Wheel arch area has necesssary gaps maintained for suspension movement.

Fender design in the areas SD and SE sections should be changed.Increasing Curvature at those regions may help to pass the Europe Standard and it does not affect majorly in producing the part.