Protection of Occupants of Commercial Vehicles by Integrated Seat/Belt Systems 791002
Because of the larger manipulation distances and the frequently installed vibration-absorbing seats (with extra vibration damping), restraint systems in commercial vehicles must meet other requirements than those in passenger cars; it was found that integrated seat/belt systems (belt anchorage incorporated in the seat) are required.
Five different types of integrated seat/belt systems were evaluated in frontal crash experiments at an impact speed of 35 km/h, using dummies in a truck cab on the catapult unit. The results were compared with those obtained with conventional three-point belts and with unrestrained dummies.
The experimental results showed that when the dummy was unrestrained or protected only by a lap belt (even if integrated) the upper load limits used as protection criteria were far exceeded because of the heavy impact on the steering wheel; this did not apply to three-point belt systems. Very favourable forward displacement kinematics were achieved when using special seats of adequate structural strength with integrated three-point belt systems; in this case the load on the occupants' bodies lies within acceptable limits, and the occupants do not hit hard against interior parts of the cab.
Further, the experiment showed that a vibration-absorbing seat with integrated three-point belt and additional supports fitted to the seat and backrest is the optimum solution.
Citation: Rüter, G. and Hontschik, H., "Protection of Occupants of Commercial Vehicles by Integrated Seat/Belt Systems," SAE Technical Paper 791002, 1979, https://doi.org/10.4271/791002. Download Citation
Author(s):
Gert Rüter, Heinrich Hontschik
Affiliated:
Battelle - Institut e.V. Frankfurt am Main Federal Republic of Germany
Pages: 18
Event:
23rd Stapp Car Crash Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Commercial vehicles
Frontal collisions
Restraint systems
Occupant protection
Seats and seating
Anthropometric test devices
Vehicle occupants
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