A brake device may include: a master cylinder including a master piston moved in connection with a pedal, and a master cylinder body having the master piston movably inserted therein and containing fluid of which hydraulic pressure is varied when the master piston is moved; a pedal force generation part housed in the master cylinder body, and restricting a motion of the master piston while interfering with the master piston depending on the motion of the master piston; a braking actuator configured to generate hydraulic pressure; an actuator connection part connecting the braking actuator to a brake mounted on a wheel; and a master connection part connecting the master cylinder to the actuator connection part.

The present disclosure increases the braking force of a parking spring brake mechanism without enlarging a device and without substantial increase in cost. The subject of the present disclosure is a brake cylinder device provided with a parking spring brake mechanism wherein a first piston moves in a prescribed braking direction. The brake cylinder device is provided with a brake force transmitting section having an inclined surface 38 that is inclined so as to press a brake output section in an advancement direction by moving along with the first piston in the braking direction. The inclined surface includes a first inclined surface provided in a distal end portion, and a second inclined surface provided in a proximal end portion and inclined more than the first inclined surface with respect to the advancement direction.

A brake cylinder of a motor vehicle, in particular a pneumatically actuatable brake cylinder of a commercial vehicle, includes a first housing part and a second housing part. An actuation tappet actuates a brake lever of a brake application device, which actuation tappet protrudes from a spring chamber of the first housing part. A membrane, which divides an interior bounded by the first housing part and the second housing part into a pressure chamber and the spring chamber, is provided, as well as a return spring for returning the actuation tappet from a braking position to a non-braking position. The return spring is arranged in a loaded manner between a housing bottom of the first housing part and a plate, which is arranged on the spring chamber side of the membrane and is connected to the actuation tappet. The return spring is provided with at least one elongation-measuring element.

A non-detachable body connection with a connection ring which enables the non-detachable connection of the upper body located at the service part of the emergency brake cylinders used in the airbrake systems of heavy weight vehicles and the lower body parts located at the emergency section by using an additional piece during the coupling with adapter plate.

A brake booster assembly having a brake booster body and a pushrod as well as a pushrod-pedal coupler are provided. The pushrod travels along a pushrod axis when being pushed. The brake booster assembly includes a pushrod-pedal coupler. The pushrod-pedal coupler comprises a pushrod-attachment end arranged on the pushrod and defining a longitudinal axis parallel to the pushrod axis. A pedal-attachment end is configured to be attached to a pedal and having a pedal pivot axis around which the pedal pivots when being pushed. The pedal pivot axis extends across the longitudinal axis. A coupler hinge is arranged between the pushrod-attachment end and the pedal-attachment end and connects the pushrod-attachment end with the pedal-attachment end. The coupler hinge has a coupler hinge axis that extends across the longitudinal axis and the pedal pivot axis. The pedal pivot axis and the coupler hinge axis are offset along the longitudinal axis.

A fastening system for fastening an annular body, in particular a covering cap, end shield, or the like. The fasting system includes an annularly extending side wall having an outer side and an inner side and comprising a collar which projects radially from the outer side, to an element, in particular a housing, hydraulic block or the like, which includes a receiving region for the collar. For fastening the annular body to the element, the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar. The element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall. The retaining contour is configured to interact in a form-fitting manner with the collar.

A fastening system for fastening an annular body, in particular a covering cap, end shield, or the like. The fasting system includes an annularly extending side wall having an outer side and an inner side and comprising a collar which projects radially from the outer side, to an element, in particular a housing, hydraulic block or the like, which includes a receiving region for the collar. For fastening the annular body to the element, the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar. The element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall. The retaining contour is configured to interact in a form-fitting manner with the collar.

A control system includes a plurality of request generation devices each of which outputs first and second requests based on a request generated by at least one application, an arbitrator that arbitrates the first and second requests and that outputs a single first request and a single second request, and a control apparatus that controls an actuator based on a final request obtained by arbitrating the first and second requests from the arbitrator and a request made by a driver. The arbitrator specifies the request generation device that has output a request corresponding to the final request based on the final request, the self-output first request, and the self-output second request. The request generation device specified by the arbitrator specifies the application that has generated the request corresponding to the final request based on the self-output first request, the self-output second request, and the request made by the driver.

An electropneumatic parking-brake valve unit for an electronically controlled pneumatic brake system has a first supply connection to a compressed air source. A spring brake connection connects to a spring brake cylinder of a vehicle. A parking-brake valve arrangement has a bistable valve switchable between switching states wherein a spring brake pressure can be controllable in dependence upon the switching state. A pneumatically switchable holding valve has a holding-valve connection for a first control pressure and the holding valve is connected between the first supply connection and the bistable valve. The holding valve is under a spring load into a first switching position wherein the bistable valve is connected to a deaerator. The bistable valve switches into a second switching position when the first control pressure exceeds a first threshold value. The bistable valve is connected to the first supply connection.

A pneumatic brake actuator has a spring brake actuator with spring and spring brake pressure chambers, and a service brake actuator with service brake pressure and pushrod chambers. A control valve has a seal that is moveable between an open position and a closed position for regulating fluid flow between the spring chamber and service brake pressure chamber. A first surface of the seal is in fluid communication with the service brake pressure chamber and a second surface of the seal is in fluid communication with a valve chamber that is not in fluid communication with the service brake pressure chamber or spring chamber. The seal moves between its open and closed positions based on a pressure in the service brake pressure chamber. Movement of the seal is not dependent on the rate of flow of fluid between the spring chamber and the service brake pressure chamber.