Autoipari Kutato Intezet

Laszlo Koroknay

Istvan Ratsko

Janos Urbantsok

An articulated vehicle comprises a tractor which has a hydraulic steering gear, and a trailer connected to the tractor by a king-pin. The vehicle further includes anti-jack-knifing apparatus comprising two co-operating brake elements of a brake mechanism, one of which is secured to the tractor and the other to the trailer. The brake mechanism is actuated under the control of a hydraulic control unit responsive to the prevailing pressures in the steering gear, the arrangement being such that a predetermined, steady, anti-jack-knifing braking force is exerted by the braking mechanism when the steering gear is in its center position during rectilinear travel of the vehicle. When the steering is turned, a braking force smaller than the predetermined braking force is exerted.

Anti-jack-knifing apparatus for articulated vehicles

Anti-jack-knifing apparatus for articulated vehicles, wherein the anti-jack-knifing force is exerted independently of the operation of the vehicle braking system by the provision of a hydraulic pressure source including two working chambers communicating via a throttling bore in a piston, the moving part of the pressure source being connected to the trailer while the stationary part is fixedly connected to the tractor, and the working spaces of the pressure source are connected with the brake cylinder of the anti-jack-knifing brake construction to actuate the latter, via throttle valve units including by-pass ducts and non-return valves.

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Budapest, Hungary

Laszlo Koroknay