An air processing unit for providing compressed air to a supply port for use in a pneumatic system with a pneumatic unit pneumatically connected to the supply port. The air processing unit comprises an inlet port for receiving the compressed air from an electrically controlled compressed air supply. An air drying unit having an input port pneumatically connected to the inlet port and configured to dry the compressed air received, a supply line configured to supply dried compressed air, a return flow control unit comprising an electrically controlled valve are also included in the air processing unit. The electrically controlled valve is provided as a single and only electrically controlled valve of the return flow control unit.

An attachment assembly for a fluid line on a vehicle may include a spigot operably coupled to the fluid line such that automotive fluid may flow from the fluid line through the spigot, a coupling member which may operably couple the fluid line to the spigot, and a locking member which may be operably coupled to the coupling member to secure the fluid line to a chassis of the vehicle via insertion of the locking member into a bore disposed at the chassis of the vehicle. The locking member may be installed on the vehicle by hand without the use of tools.

An electrohydraulic brake control device for hydraulically actuable wheel brakes has an electrically activatable hydraulic pressure source, an inlet valve for each of the hydraulically actuable wheel brakes, an outlet valve for each of the hydraulically actuable wheel brakes and a pressure medium reservoir. For at least one of the hydraulically actuable wheel brakes, the brake control device has a pressure build-up wheel connection and a pressure release wheel connection. Also, a brake system for a motor vehicle having such a brake control device and a method for operating such a brake system are also disclosed.

An electrohydraulic brake control device for hydraulically actuable wheel brakes has an electrically activatable hydraulic pressure source, an inlet valve for each of the hydraulically actuable wheel brakes, an outlet valve for each of the hydraulically actuable wheel brakes and a pressure medium reservoir. For at least one of the hydraulically actuable wheel brakes, the brake control device has a pressure build-up wheel connection and a pressure release wheel connection. Also, a brake system for a motor vehicle having such a brake control device and a method for operating such a brake system are also disclosed.

A hydraulic connector for removably joining together a first and a second piece of a tube of a hydraulic system of a bicycle includes a tubular sleeve extending along a middle axis, a first area of the tubular sleeve to be fixed to the first piece of tube, and a second area of the tubular sleeve to be fixed to the second piece of tube. The hydraulic connector also includes a first tubular segment and a second tubular segment. Both of the tubular segments extend along the middle axis and have an internal diameter adapted for receiving the pieces of tube to be joined. The hydraulic connector also includes a first hollow screw, in screwing engagement with the first area of the tubular sleeve, and the first tubular segment is formed in the first hollow screw. The tubular sleeve and the first hollow screw, in every section thereof along the middle axis, have an internal diameter equal to or greater than the internal diameter of the tubular segments.

Methods are described for verifying the operation of at least one braking means of at least one vehicle. A method comprises determining that at least one braking means of the vehicle is malfunctioning when at least one estimated braking force value is different from a predetermined verification braking force value Fa. A further method comprises determining that at least one braking means of a plurality of braking means is malfunctioning when an estimated total braking force value is different from an expected verification total braking force value. Yet a further method comprises determining that at least one braking means is malfunctioning when at least one measured friction force value Fb differs from an expected friction force value. Yet a further method comprises determining that at least one braking means of a plurality of braking means is malfunctioning when a total friction force value Fb.sub.tot differs from an expected total friction force value. Corresponding systems for verifying the operation of at least one braking means of at least one vehicle are also described.

Methods are described for verifying the operation of at least one braking means of at least one vehicle. A method comprises determining that at least one braking means of the vehicle is malfunctioning when at least one estimated braking force value is different from a predetermined verification braking force value Fa. A further method comprises determining that at least one braking means of a plurality of braking means is malfunctioning when an estimated total braking force value is different from an expected verification total braking force value. Yet a further method comprises determining that at least one braking means is malfunctioning when at least one measured friction force value Fb differs from an expected friction force value. Yet a further method comprises determining that at least one braking means of a plurality of braking means is malfunctioning when a total friction force value Fb.sub.tot differs from an expected total friction force value. Corresponding systems for verifying the operation of at least one braking means of at least one vehicle are also described.

A disc braking system, comprising: a brake disc; first and second perforated brake pad arrangements each comprising a brake pad, and each having a backside facing away from the brake disc and a frontside facing the brake disc and being configured to interact with the brake disc upon the disc braking system being operated; an air blowing arrangement arranged to blow air into a space between the frontsides of the first and second brake pad arrangements and the brake disc; and an air suction arrangement coupled to the backsides of the first and second brake pad arrangements and being controllable to suck dust resulting from braking through the first and second brake pad arrangements, wherein the air blowing arrangement comprises an expansion valve, a perforated plate, and a diffuser in series.

A disc braking system, comprising: a brake disc; first and second perforated brake pad arrangements each comprising a brake pad, and each having a backside facing away from the brake disc and a frontside facing the brake disc and being configured to interact with the brake disc upon the disc braking system being operated; an air blowing arrangement arranged to blow air into a space between the frontsides of the first and second brake pad arrangements and the brake disc; and an air suction arrangement coupled to the backsides of the first and second brake pad arrangements and being controllable to suck dust resulting from braking through the first and second brake pad arrangements, wherein the air blowing arrangement comprises an expansion valve, a perforated plate, and a diffuser in series.

A pneumatic brake cylinder of a vehicle brake has a brake cylinder housing, a brake piston guided axially in the brake cylinder housing with an extendable and retractable piston rod, which projects through an opening in a bottom of the brake cylinder housing, and a brake chamber which can be ventilated and exhausted. A fastening device is provided for the detachable fastening of the brake cylinder to a support structure for the brake cylinder, and includes at least one fastening bolt projecting away from the brake cylinder housing in the region of the bottom. A venting device interacts with the return spring chamber such that, in the event of a change in the volume of the return spring chamber as a result of a movement of the brake piston, air can pass out of the return spring chamber or into the return spring chamber by the venting device. The ventilation device includes the at least one fastening bolt which has at least one internal channel which opens, on the one hand, with a first mouth into the return spring chamber and, on the other hand, with a second mouth into an outer area of the brake cylinder.