A brake clearing system useful for clearing mechanical components of one or more brake units provided on a freight trailer having an air storage reservoir. The system includes a flow controller, at least one delivery hose, and at least one discharge device. The flow controller is fluidly between the air storage reservoir and the auxiliary tank. The delivery hose is fluidly connected to an outlet of the flow controller and delivers pressurized air to the discharge device. The discharge device, in turn, is configured to direct pressurized air at components of one of the brake units. The flow controller can include an inflow control unit, an auxiliary tank, and an outflow control unit. In related embodiments, the auxiliary tank can include a heater.

A fluid reservoir comprises a first compartment, a second compartment, a port, a drain, and a tube. The port is fluidly connected to the first compartment and positioned at a port height. The drain is fluidly connected to the first compartment and the second compartment. An entrance to the drain is positioned in the first compartment at a drain entrance height which is lower than the port height. The tube is fluidly connected to the first compartment and the second compartment. An entrance to the tube is positioned in the first compartment at a tube entrance height which is higher than the drain height.

A fluid reservoir comprises a first compartment, a second compartment, a port, a drain, and a tube. The port is fluidly connected to the first compartment and positioned at a port height. The drain is fluidly connected to the first compartment and the second compartment. An entrance to the drain is positioned in the first compartment at a drain entrance height which is lower than the port height. The tube is fluidly connected to the first compartment and the second compartment. An entrance to the tube is positioned in the first compartment at a tube entrance height which is higher than the drain height.

A braking system, comprising an air reservoir, a first brake chamber, a first flow control device connected to the first brake chamber via a second fluid conduit, a second brake chamber, a second flow control device connected to the second brake chamber via a fourth fluid conduit, a third flow control device connected between the first flow control device and the first brake chamber, a parking brake sub-system configured to apply a parking brake when an air pressure falls below a threshold, and a control unit configured to control the third flow control device to maintain the pressure inside the first brake chamber, and each of the first flow control device and the second flow control device to allow air from the air reservoir arrangement to be discharged from the braking system, until the pressure provided by the air reservoir arrangement has fallen below the predefined parking brake threshold pressure.

Engine systems have an air induction system, a turbocharger in fluid communication with an intake manifold, an evacuator defining a Venturi gap with a suction port in fluid communication therewith, a relief valve enclosing a piston and defining an inlet and an outlet in selective fluid communication with one another, and a storage tank of high pressure air in fluid communication with the evacuator. The relief valve has a valve element connected to the piston, and the piston divides the housing into a pressurized chamber in fluid communication with the suction port of the evacuator and a bypass portion in fluid communication with the inlet, which is in fluid communication with the compressed air from the turbocharger, and the outlet, which is in fluid communication with the air induction system or atmosphere. A discharge cone of the evacuator is in fluid communication with atmosphere or the air induction system.

A safety system brake system comprises a hydraulic pressure-providing device having a pressure chamber connected to at least one brake circuit by a separating valve and into which pressure chamber a piston is moved to build up pressure. The pressure chamber is a two-stage pressure chamber having first and second sub-chambers. During pressure build-up the piston is moved into the first and then the second sub-chamber. The two sub-chamber are hydraulically closed off from each other when the piston is moved a specified distance into the second sub-chamber. A first check valve is connected to the first sub-chamber on a suction side and to a brake fluid reservoir on a blocking side. A second check valve is connected to the second sub-chamber on a suction side, and to the suction side of the first check valve on the blocking side.

A safety system brake system comprises a hydraulic pressure-providing device having a pressure chamber connected to at least one brake circuit by a separating valve and into which pressure chamber a piston is moved to build up pressure. The pressure chamber is a two-stage pressure chamber having first and second sub-chambers. During pressure build-up the piston is moved into the first and then the second sub-chamber. The two sub-chamber are hydraulically closed off from each other when the piston is moved a specified distance into the second sub-chamber. A first check valve is connected to the first sub-chamber on a suction side and to a brake fluid reservoir on a blocking side. A second check valve is connected to the second sub-chamber on a suction side, and to the suction side of the first check valve on the blocking side.

The Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided, the device being configured to be installed in a Banjo bolt equipped-vehicle's brake system. The Pre-Pressurized adaptive Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided includes a housing having an internal bore, outer threads, and a passageway extending from the outer surface of the housing to the internal bore, the internal bore containing brake fluid. The Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided also includes a cap, adapted to be fastened to the housing and retain a primary seal. The cap defines the chamber therein, the chamber holding an elastomeric adaptive insert. The Primary seal provides a barrier between brake fluid in the brake system, and the elastomeric insert held within the chamber. A secondary o-ring seal is provided to prevent brake fluid leakage should the primary seal fail and entrapment of compressed elastomeric adaptive insert to initiate pre-pressurization of the membrane when the cap is tightened during assembly.

The Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided, the device being configured to be installed in a Banjo bolt equipped-vehicle's brake system. The Pre-Pressurized adaptive Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided includes a housing having an internal bore, outer threads, and a passageway extending from the outer surface of the housing to the internal bore, the internal bore containing brake fluid. The Pre-Pressurized adaptive Banjo-Bolt accumulator valve device is provided also includes a cap, adapted to be fastened to the housing and retain a primary seal. The cap defines the chamber therein, the chamber holding an elastomeric adaptive insert. The Primary seal provides a barrier between brake fluid in the brake system, and the elastomeric insert held within the chamber. A secondary o-ring seal is provided to prevent brake fluid leakage should the primary seal fail and entrapment of compressed elastomeric adaptive insert to initiate pre-pressurization of the membrane when the cap is tightened during assembly.

A method for manufacturing a vehicle pressure accumulator, in which a thermoplastic parison is used to form an enclosure around a chamber by applying at least one portion, at least partially molten, of the parison onto at least one portion of the chamber, to attach the parison to the chamber.