Hydraulic steering aid system for a commercial vehicle has redundant interlinked hydraulic circuits with pumps linked to a computer by signals, e.g. a central power computer for identifying faults.

摘要

Hydraulic circuits (11,12) have pumps (1,2) to supply them and can be replaced by an emergency circuit (13) fed by an emergency steering pump (3). Faults occurring in a hydraulic steering aid system for a commercial vehicle are registered in a manner that is technically optimized and then displayed to a driver.