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INTERNATIONAL ORGANIZATION OF MOTOR VEHICLE MANUFACTURERS. Lower/Upper Bumper Reference Line. Data on existing vehicles. Lower Bumper Reference Line i s very close to the practical lower bumper height because of the absence of a skirt. Practical Upper Bumper Height. about 508mm. about 406mm.

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Lower/Upper Bumper Reference Line


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lower upper bumper reference line

INTERNATIONAL ORGANIZATION OF MOTOR VEHICLE MANUFACTURERS

Lower/Upper Bumper Reference Line

Data on existing vehicles

Pedestrian Safety GRSP Informal Group - January 06

introduction

Lower Bumper Reference Line is very close to the practical lower bumper height because of the absence of a skirt

Practical Upper Bumper Height

about 508mm

about 406mm

25º

Lower Bumper Reference Line

Approach Angle for SUV

Typical Passenger Car

Typical SUV

Introduction

Practical Lower Bumper Height

Around 444 mm

Around 230 mm

SUV’s practical bumper height is aligned to that of passenger car for compatibility.

Pedestrian Safety GRSP Informal Group - January 06

slide4

Average SUV: 444 mm

Average other: 230 mm

Pedestrian Safety GRSP Informal Group - January 06

slide5

Counter measures for Lower Leg Requirements

or

Typical Current Passenger Car

Improved car

Largebendingangle

Smallbendingangle

Addskirt

Practically 60mm Energy Absorbing bumper needed

Typical SUV

Large bending angle

High bumper test requirement

@ Max. Load 7.5KN @Max. Bending Moment 510Nm

Practically 120mm Energy Absorbing bumper needed

Typical passenger cars can meet the angle requirement, because they can have lower load path at the skirt. However, SUV cannot have such lower load path and have difficulties to meet the angle requirement.

conclusions
Conclusions
  • SUV, because of their basic design, cannot include a lower load path for the lower leg test
  • SUV therefore need the option of the upper leg bumper test
  • Typical Lower Bumper Reference Line for SUV start at 340 mm up to 500 mm
  • Starting such option at LBRL > 500 mm would therefore solve the problems for only a very small number of vehicles, if any !

Pedestrian Safety GRSP Informal Group - January 06