A commercial vehicle power steering system with driver selectable electronically controlled efforts, designated by TRW as the X-4, was designed and tested on Class 8 trucks. The TRW X-4 system is a variable-flow power assist concept. Prototypes of the system proved successful in installations on highway line-haul tractors from several manufacturers. The X-4 system provides increased steering road feel at highway speeds, without a reduction in power assist at low speeds. In addition to enhanced steering and handling performance, test results indicate that the X-4 system significantly reduces the power consumption as compared to the production OEM power steering system.
Electronically controlled steering systems for line haul vehicles
Elektronisch gesteuerte Lenksysteme fuer Liniensattelzugschlepper
SAE-Papers ; Nov ; 1-11
1987
11 Seiten, 19 Bilder, 2 Tabellen, 9 Quellen
Conference paper
English
Electronically Controlled Steering Systems for Line Haul Vehicles
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