Comparator for the control system of an automatic steering unit

Details Comparator for the control system of an automatic steering unit Comparator for the control system of an automatic steering unit

B - Operations, Transporting

62

D

180/58

B62D 1/00 (2006.01) A01D 41/127 (2006.01) B62D 1/26 (2006.01) B62D 15/00 (2006.01)

Patent

CA 1136994

ABSTRACT OF THE DISCLOSURE A comparator for the control system of the automatic steering unit of a vehicle, the comparator comprising the following characteristics: the vehicle is equipped with two sensors sensing a directrix or guide line either in parallel with each other or jointly, the comparator establishes, as input magnitudes for the control, the difference between three magnitudes, namely the two output signals from the sen- sors, which are functions of the distances from the directrix or directrices, and an auxiliary control magnitude fed back from the steering, the comparator communicates with the sen- sors through two hydraulic lines and is influenced by output magnitudes in the form of pressure; the comparator contains, in a pressure fluid chamber, a member which is adjustable by pressures, acts upon the closing elements of two lifting valves, and controls the fluid pressure representing the differential signal in the flows of fluid passing through the said chamber, the adjustable member is in mechanical drive connection with a steering element i.e. the steered part of the vehicle, according to P 27 38 328.4-21, characterized by the following features: the adjustable member is a separating element which divides the pressure fluid chamber into two pressure chambers, hydraulic lines run from the pressure chambers to a return line, arranged in the hydraulic lines are adjustable throttles in mechanical drive connection with the sensors; and the mechanical drive connection between the steering element and the resilient separating element con- tains a spring.

352195

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