Device Keeps Trucks From Jack-Knifing

Gismag.com:

… Greek researchers have recently created a system that they claim could greatly reduce jack-knifing.

First of all, there are already some technologies that help reduce the risk of a jack-knife occurring. These include anti-lock brakes in the tractor, electromagnetic brakes in the trailer, and devices that limit the angle between tractor and trailer at higher speeds. According to University of Patras engineers Nick Koussoulas and Stamatis Manesis, however, nothing tried so far has been sufficiently reliable.

What they have devised is a new type of kingpin. The kingpin is the junction where the tractor and trailer are joined, and it is normally situated in one static location on the rear of the tractor. The new kingpin, however, slides linearly, parallel to the tractor’s rear axle. In this way, sudden movements of the trailer result in the kingpin temporarily sliding over a bit, instead of having the trailer swinging out across the road.

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