Anti-jack-knifing systems for articulated vehicles

Abstract

Abstract 1,243,005. Anti-jack-knifing arrangements. DUNLOP HOLDINGS Ltd. 24 Oct., 1968 [31 Oct., 1967], No. 49341/67. Heading B7T. [Also in Division F2] An anti-jack-knifing system for an articulated vehicle comprises a device operable to restrict freedom of pivoting of a tractor portion relative to a trailer portion, and a skid-sensing means responsive to a change in the rate of rotation of an associated wheel of the vehicle and arranged to actuate the device, the device being operable only when actuated by the skid-sensing means. In Fig. 1, a pneumatically-operated brake 4 is arranged coaxially with a king-pin 3 which links tractor portion 1 and a trailer portion 2. A skid-sensing means 5, arranged between the king-pin brake 4 and a reservoir 6 of air pressurized by an engine-driven compressor, is coupled to the propeller shaft of the tractor portion. A second skid-sensing means 7, arranged between the king-pin brake and a reservoir 8 of pressurized air, is coupled to the back wheels of the trailer. When an incipient skid develops at either the rear wheels of the trailer or the rear wheels of the tractor, the appropriate skid-sensing means operates to connect the king-pin brake to an air reservoir, causing actuation of the king-pin brake. In Fig. 2 (not shown) a sleeve having a helicalslotted connection with a shaft (driven from a wheel or the vehicle propeller shaft), is forced to move axially along the shaft by inertia mechanism, including a flywheel, when the shaft is decelerated. The end of the sleeve, on such movement, operates an air valve to supply the king-pin brake. Fig. 3 (not shown) depicts a skid-sensing means, including two speedresponsive governor-type mechanisms, which is the subject of Specification 1,241,798. For details of both apparatus, see Division F2.

Inventors

• 👤 John Walter Davis

Bibliographic Details