Tractor-trailer brake system including a trailer brake control valve
AssigneeRobert Bosch GmbH
InventorsEgbert Muller, Ingolf Grauel, Werner Stumpe
Life of this patent
Estimating the term…
Abstract
A tractor-trailer braking system with a control valve for the trailer which is controllable by at least two service brake circuits of the tractor. One circuit of this multi-circuit control has an electrical control in the form of magnetic valves, or the like, in order to speed up the control process. The system may be combined with a load-dependent switching element and/or with an anti-skid protection-dependent switching element.
Claims9
A tractor-trailer compressed air brake system having a protective valve on said tractor for dividing compressed air from a compressed air supply source into four different compressed air circuits on said tractor and to said trailer, a dual-circuit brake control means on said tractor controlled by a foot-operated brake control pedal for operating a first and second service brake control circuit, a compressed air control valve on said tractor for controlling compressed air to said trailer, said compressed air control valve including at least two pressure control elements, one of said at least two pressure control elements controllable by said first service brake control circuit and another of said at least two pressure control elements controllable by said second service brake control circuit via said foot-operated dual circuit brake control means, one of said first and second service brake control circuits including an electrically responsive control circuit means for controlling one service brake control circuit and one control element of said control valve for the trailer.
Dependencies are inferred from the claim text.