Electrically controlled brake system
AssigneeWABCO GmbH
InventorsUwe Bensch, Henning Förster, Jörg Helmer, Bernd-Joachim Kiel, Hartmut Rosendahl, Otmar Struwe, Matthias Tiedtke
Life of this patent
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Abstract
An electrically controlled brake system for a tractor is provided that is equipped with an anti-jackknifing brake that can be actuated by means of a manual operating element and that acts only on the brakes of a trailer coupled to the tractor. The operating element is an electrical element which generates an electrical signal to control a valve device by means of which the braking force of the anti-jackknifing brake can be increased.
Claims14
An electrically controlled anti-jackknifing brake system of a tractor vehicle, said tractor vehicle being connectable to a trailer vehicle, said brake system operable to brake only brakes of said trailer vehicle, said anti-jackknifing brake system comprising a manually operable electrical operating element for actuating said brake system, said electrical operating element being operable to generate an electrical operating element signal to control a trailer control valve to influence braking force of said brakes of said trailer vehicle, said electrical operating element signal being at least one of (a) a data bus message and (b) transformable into a data bus message by at least one of (i) a parking brake modulator and (ii) a control device associated with said parking brake modulator and (iii) an electronic control unit;
- and a brake-control module for controlling brake pressure in at least one of brakes of said tractor vehicle and said brakes of said trailer vehicle, said brake-control module being operable to evaluate said data bus message, generate an electrical anti-jackknifing brake control signal as a function of said data bus message and transmit said data bus message to said trailer control valve to influence braking force of said brakes of said trailer vehicle.
An electrically controlled anti-jackknifing brake system of a tractor vehicle, said tractor vehicle being connectable to a trailer vehicle, said brake system operable to brake only brakes-of said trailer vehicle, said anti-jackknifing brake system comprising a manually operable electrical operating element for actuating said brake system, said electrical operating element being operable to generate an electrical operating element signal to control a valve device, said valve device being operable to adjust a brake reservoir pressure of said trailer vehicle to influence braking force of said brakes of said trailer vehicle, wherein said braking force of said brakes of said trailer vehicle is generated by a service brake of said trailer vehicle.
An electrically controlled anti-jackknifing brake system of a tractor vehicle, said tractor vehicle being connectable to a trailer vehicle, said brake system operable to brake only brakes-of said trailer vehicle, said anti-jackknifing brake system comprising a manually operable electrical operating element for actuating said brake system, said electrical operating element being operable to generate an electrical operating element signal to control a valve device, said valve device being operable to adjust a brake reservoir pressure of said trailer vehicle to influence braking force of said brakes of said trailer vehicle, wherein said valve device for influencing braking force of said brakes of said trailer vehicle includes a 4/2-way solenoid valve having four pneumatic ports and two states, and wherein, in a first, de-energized one of said two states, a trailer reservoir pressure line from at least one compressed-air reservoir tank of said tractor vehicle to a compressed-air reservoir tank of said trailer vehicle is controlled by a further valve with respect to pressure, and a control line from a brake-actuating device of a service brake of said trailer vehicle to at least one brake cylinder of said service brake for control of service brake pressure is not influenced, and wherein, in a second, energized one of said two states, said trailer reservoir pressure line is in pneumatic communication with said at least one compressed-air reservoir tank of said tractor vehicle, and said control line is pressurized with compressed air from said at least one compressed-air reservoir tank of said tractor vehicle by said further valve.
Dependencies are inferred from the claim text.