American Ergonomics Corporation

New Seat Mechanics to Reduce

Occupant Injury and Enhance Comfort

Hector Serber
American Ergonomics Corporation
Copyright © 1998 Society of Automotive Engineers, Inc.

Abstract
Introduction
Background
Injury Load Trade Offs
CBM Seat Mechanics
Sled Test Results
Optimization Methodology
MADYMO Crash Simulations
Road Test
Performance Summary

Road Test

The CBM dynamics matches the motion of the body with the motion of the seat, selfadjusting smoothly, while maintaining support without manual adjustments. Fig. 16

Figure 16: CBM Seat Self-Adjustment

During normal driving conditions, the seat and lumbar function to support the body evenly. Leg motion and hand-reach improve allowing easier posture change, lowering fatigue levels in extended driving.

Upon a panic stop, the seat reacts to hold the occupant securely on the seat. The seat and lumbar move into a more supportive angle.

Road testing has met with very positive responses. Drivers and passengers have remarked on the comfort, ease of adjustably, and like the safe feeling of the seat motion.

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