Abstract: An actuating device includes a vehicle operating brake and parking brake. A first braking effect is generated by the parking brake independently of a braking procedure for the operating brake. The actuating device comprises a first switched state, wherein the first braking effect of the parking brake cannot be provided, and a second switched state, wherein the first (full) braking effect of the parking brake is provided. The actuating device further comprises a manually actuatable operating element for actuating the parking brake that comprises travel positions. The actuating device is switched to the second switched state in a first travel position when the parking brake is released, and to the first switched state when the parking brake is applied. Also, the actuating device is switchable to a further switched state. In an actuating method, the actuating device is switched to the further switched state in response to an actuation.

Abstract: A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration/venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by a common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.

Abstract: A pneumatic vehicle brake system includes first and second groups of wheel brakes belonging, respectively, to first and second brake circuits having first and second compressed air storage tanks for providing first and second stored pressures. At least one first circuit brake cylinder is a combined spring-store/diaphragm cylinder with a spring store part for providing a parking brake and a diaphragm part for providing a service brake. If the first circuit fails, the spring store part is deaerated to engage the parking brake. A pressure sensor for measuring the first stored pressure is connected to a control unit that controls a modulator for aerating and deaerating the spring store part. The control unit generates a signal for an electrically actuatable modulator solenoid valve if the value measured by the sensor falls below a minimum value, such that the spring store part can be aerated and deaerated via the valve.

Abstract: An electropneumatic brake control device for controlling an air-quantity-boosting valve device which controls a parking brake of a vehicle. A valve unit is provided that has a vent valve for venting a control input of the air-quantity-boosting valve device. The vent valve has three states. In a first state, the control input of the air-quantity-boosting valve device can be vented in a throttled manner by using an aperture. In a second state, the control input of the air-quantity-boosting valve device cannot be vented. In a third state, the control input of the air-quantity-boosting valve device can finally be vented in an unthrottled manner.

Abstract: A valve unit for an electro-pneumatic brake control device for controlling a parking brake of a vehicle includes at least one air-quantity-boosting valve device for aerating and venting at least one spring brake cylinder of the parking brake and at least one electrically actuatable control valve for controlling the air-quantity-boosting valve device. To simplify the construction of the brake control device, the air-quantity-boosting valve device and the control valve are integrated in a common integral valve block.

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.

Abstract: An electropneumatic parking brake modulator for controlling a parking brake mode of trailer brakes in a vehicle/trailer combination includes a valve element for airing and bleeding the trailer spring brake cylinders, at least one compressed air reservoir inlet for airing at least one compressed air line in the parking brake modulator with compressed air from a compressed air reservoir of the towing vehicle, at least one compressed air reservoir outlet at which a reservoir pressure can be made available for the brakes of the trailer, and at least one compressed air control outlet at which a control pressure can be made available for the brakes of the trailer. A towing vehicle protection valve is integrated into the parking brake modulator, and a compressed air line to the compressed air control outlet is automatically blockable when the reservoir pressure made available for the trailer falls below a predetermined threshold value.

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.

Abstract: A brake system for a vehicle includes a parking brake with an air-quantity-boosting-valve device for aerating and deaerating at least one spring brake cylinder of the parking brake, at least one electrically actuatable control valve for controlling the air-quantity-boosting-valve device, an electrical control device electrically coupled to the electrically actuatable control valve for controlling the electrically actuatable control valve, and an electrical actuating device coupled to the control device for actuating the parking brake. In order to be able to resort to available series-produced components, the air-quantity-boosting-valve device, the control valve, the electrical control device and the actuating device are, in each case, embodied as autonomous components arranged spatially separate from one another.

Abstract: An electrically controlled brake system 10 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.

Abstract: The invention relates to an actuating device for a parking brake of a vehicle, in particular a commercial vehicle, wherein the actuating device comprises an operating brake for driving operation and the parking brake for securing the vehicle. A first braking effect can be generated by means of the parking brake for the vehicle independently of a braking procedure for the operating brake. The actuating device comprises a first switched state, wherein the first braking effect of the parking brake cannot be provided, and comprises a second switched state, wherein the first, in particular full, braking effect and the parking brake can be provided.

Abstract: A parking brake module for a pressure medium-operated brake system of a vehicle having a parking brake function enabled by at least one spring brake cylinder includes a first valve device that increases the amount of pressure medium and has an inlet that can be connected to a pressure medium reservoir, an outlet that can be connected to at least one spring-loaded part of a spring brake cylinder, and a control input connected to a control line. A second valve device encompasses at least one first connection used as a trailer control valve connection and can be connected to a trailer control valve to control a trailer brake. To provide a valve concept for different vehicle configurations, particularly including an anti jackknifing function, pressure prevailing at the first connection can be adjusted regardless of pressure prevailing in the pressure medium reservoir and at the outlet of the first valve device.

Abstract: The invention relates to an electropneumatic parking brake modulator for controlling a parking brake mode of brakes of at least one trailer in a vehicle/trailer combination that consists of a towing vehicle and the trailer. The parking brake, modulator (1) comprises a valve element (12) for airing and bleeding the spring brake cylinders of the brakes of the trailer. The parking brake modulator (1) further comprises at least one compressed air reservoir inlet (7, 8) for airing at least one compressed air line (10) in the parking brake modulator (1) with compressed air from a compressed air reservoir (3, 4) of the towing vehicle and at least one compressed air reservoir outlet (14) at which a reservoir pressure can be made available for the brakes of the trailer. The parking brake modulator (1) finally comprises at least one compressed air control outlet (17) at which a control pressure can be made available for the brakes of the trailer.

Abstract: The invention relates to a parking brake module (10) for a pressure medium-operated brake system of a vehicle having a parking brake function by means of at least one spring brake cylinder (12). Said parking brake module (10) comprises a first valve device (44) which increases the amount of pressure medium and is fitted with an inlet (46) that can be connected to a pressure medium reservoir (24), an outlet (50) that can be connected to at least one spring-loaded part (14) of a spring brake cylinder (12), and a control input (58) that is connected to a control line (60). The parking brake module (10) further comprises a second valve device (76) encompassing at least one first connection (78) which is used as a trailer control valve connection and can be connected to a trailer control valve (22) in order to control a trailer brake.

Abstract: The invention relates to a method for operating a brake device of a motor vehicle, comprising a service brake (16) and a parking brake (14). Upon activation of a rolling brake function (S1), and achieving a full stop of the vehicle, monitoring (S2) of an actuating element occurs with regard as to whether a driver has contact with an actuating element. In order to improve the safety of the rolling brake function, the invention provides that, if the monitoring (S2) finds that the driver has no contact with the actuating element, the parking brake (14) is applied (S3), or a braking pressure (14) is controlled using the service brake (16), the braking pressure corresponding to the maximum braking pressure (S10) that can be generated by the parking brake (14), by means of an electric or electronic brake device (26) for controlling the service brake (16) and the parking brake (14).

Abstract: The invention relates to a valve unit (14) for an electro-pneumatic brake control device (10) for controlling a parking brake of a vehicle, wherein the valve unit (14) has at least one air-quantity-boosting valve device (64) for aerating and deaerating at least one spring brake cylinder (12) of the parking brake and at least one electrically actuable, control valve (86) for controlling the air-quantity-boosting valve device (64). In order to simplify the construction of the brake control device, the air-quantity-boosting valve device (64) and the control valve (86) are integrated in a common integral valve block (112).

Abstract: The invention relates to an electropneumatic brake control device for controlling an air-quantity-boosting valve device (64) which controls a parking brake of a vehicle. The valve unit (86) has a deaeration valve (134) for deaerating a control input (82) of the air-quantity-boosting valve device (64). The invention provides that the deaeration valve (134) is a valve which has three states I, II and III and which is embodied such that, in a first state I, the control input (82) of the air-quantity-boosting valve device (64) can be deaerated in a throttled manner by means of an aperture (162). In a second state II, the control input (82) of the air-quantity-boosting valve device (64) cannot be deaerated. In a third state III, the control input (82) of the air-quantity-boosting valve device (64) can finally be deaerated in an unthrottled manner.

Abstract: A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration/venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.

Abstract: The invention relates to a pneumatic brake system 72 for a vehicle with brake cylinders 82, 84, which can be actuated with compressed air, for actuating wheel brakes, wherein a first group of wheel brakes belongs to a first brake circuit with a first compressed air storage tank 116 for providing a first stored pressure, and a second group of wheel brakes belongs to a second brake circuit with a second compressed air storage tank 130 for providing a second stored pressure, wherein at least one brake cylinder of the first brake circuit is embodied as a combined spring-store/diaphragm cylinder 84 with a spring store part 86 for providing a parking brake and a diaphragm part 88 for providing a service brake. In the event of a failure of the first brake circuit, the spring store part 86 can be deaerated in order to engage the parking brake.

Abstract: The invention relates to a brake system (10) for a vehicle having a parking brake with an air-quantity-boosting valve device (34) for aerating and deaerating at least one spring brake cyclinder (14) of the parking brake, having at least one electrically actuable control valve (52) for controlling the air-quantity-boosting valve device (34), having an electrical control device (12), which is electrically coupled to the electrically actuable control valve (52), for controlling the electrically actuable control valve (52), and having an electrical actuating device (122), which is coupled to the control device (12), for actuating the parking brake. In order to be able to resort to available series-produced components, the air-quantity-boosting valve device (34), the control valve (52), the electrical control device (12) and the actuating device (122) are in each case embodied as autonomous, separate components which are arranged spatially separate from one another.