A vehicle brake booster includes a brake input member configured to receive a braking input force and a booster housing divided into a first chamber adjacent the brake input member and a second chamber remote from the brake input member. A poppet valve includes a poppet valve body and a poppet seal, the poppet valve operable to maintain separation between pressure and vacuum during assisted braking and further being operable to enable evacuation of the air from the first chamber through one or more side ports of the poppet valve body upon release of the braking input force and completion of the assisted braking A restrictor element provides a predetermined release speed for the booster. The one or more side ports define a total flow resistance of the poppet valve body which is less than an effective total flow resistance of the poppet valve body set by the restrictor element.

An electromagnetic pressure-control-valve for controlling an air-pressure, including a housing having a compressed-air (CA) supply-connector (SC) for connecting to a CA-supply, a CA outlet-connector (OC) for connecting to a consumer, and a CA ventilating-connector (VC) for a ventilating means, and an armature supporting one valve-body (VB), first VB and second VB, on its end sides which face away from one another, and displaceable within the housing by magnetic forces counter to a spring-force of a first spring so that it connects the CA-OC selectively to the CA-SC or the CA-VC, and a first valve-seat (VS) connected to the CA-SC, and a second VS connected to the CA-VC, in which the first VB and a first VS form an inlet-valve, and the second VB and second VS form an outlet-valve. A permanent axial CA connection is provided through the first VB, the armature interior and the second VB.

An electromagnetic pressure-control-valve for controlling an air-pressure, including a housing having a compressed-air (CA) supply-connector (SC) for connecting to a CA-supply, a CA outlet-connector (OC) for connecting to a consumer, and a CA ventilating-connector (VC) for a ventilating means, and an armature supporting one valve-body (VB), first VB and second VB, on its end sides which face away from one another, and displaceable within the housing by magnetic forces counter to a spring-force of a first spring so that it connects the CA-OC selectively to the CA-SC or the CA-VC, and a first valve-seat (VS) connected to the CA-SC, and a second VS connected to the CA-VC, in which the first VB and a first VS form an inlet-valve, and the second VB and second VS form an outlet-valve. A permanent axial CA connection is provided through the first VB, the armature interior and the second VB.

A method for operating a braking system of a vehicle includes: establishing a first setpoint brake pressure to be set in a first wheel brake cylinder of a first brake circuit and a second setpoint brake pressure to be set in a second wheel brake cylinder of a second brake circuit; reducing first and second actual brake pressures by setting a master brake cylinder pressure to be no greater than a minimum of the first and second setpoint brake pressures, and controlling a first switchover valve of the first brake circuit and/or of the second brake circuit; and/or increasing the first and second actual brake pressures by setting the master brake cylinder pressure to be no smaller than a maximum of the first and second setpoint brake pressures, and activating a first wheel inlet valve of the first brake circuit and/or of the second brake circuit.

A method for operating a braking system of a vehicle includes: establishing a first setpoint brake pressure to be set in a first wheel brake cylinder of a first brake circuit and a second setpoint brake pressure to be set in a second wheel brake cylinder of a second brake circuit; reducing first and second actual brake pressures by setting a master brake cylinder pressure to be no greater than a minimum of the first and second setpoint brake pressures, and controlling a first switchover valve of the first brake circuit and/or of the second brake circuit; and/or increasing the first and second actual brake pressures by setting the master brake cylinder pressure to be no smaller than a maximum of the first and second setpoint brake pressures, and activating a first wheel inlet valve of the first brake circuit and/or of the second brake circuit.

An electrically controlled valve for electrically controlling air brakes by releasing pressurized air at a controlled rate. The electrically controlled valve is useful for connecting a trailer with air brakes to a standard electrical connector on a towing vehicle that provides a proportional braking signal. The proportional signal is sent to the electrically actuated valve and a controller within the valve process the signal. When electrically actuated valve receives the proportional braking signal from the towing vehicle representing no braking force, electrically actuated valve to produce no air pressure to the air brake. When the electrically actuated valve receives the proportional braking signal from the towing vehicle representing full braking force, the electrically actuated valve provides air to the air brakes corresponding to full braking force of the air brakes.

A motion manager that is mounted on a vehicle includes a processor and a memory. The processor receives a motion request that corresponds to an application from individual applications. The processor arbitrates the received motion request. The processor generates, based on an arbitration result, an instruction value of an operation request to be output to a brake control unit. The memory stores, in advance, type information of an actuator to be controlled by the brake control unit. The processor generates the instruction value of the operation request using the type information.

A valve assembly for a pneumatic system of a vehicle, in particular a commercial vehicle, including: an outlet valve assembly for venting the pneumatic system, a control device for operating the valve assembly in order to admit and release air to and from a pneumatic actuator, wherein the control device is configured to output, to the outlet valve assembly, a switching signal for switching the outlet valve assembly, and, via the switching signal, the outlet valve assembly can be switched to a noise-reducing first venting mode or a quick-venting second venting mode.

A brake system comprises an electronic stability control (ESC) module defining a first interconnect passage, and a pressure supply unit (PSU) module defining a second interconnect passage in fluid communication with the first interconnect passage. The ESC module includes a first pump configured to transfer brake fluid from the PSU module and to a plurality of wheel brakes, and a prime valve configured to selectively control fluid communication between the first interconnect passage and an inlet of the first pump. The PSU module includes a second pump configured to transfer the brake fluid from a fluid reservoir to the first interconnect passage, and a bypass fluid passage from the fluid reservoir to the ESC module with an inline check valve allowing fluid flow through the bypass fluid passage from the fluid reservoir and to the ESC module while blocking fluid flow in an opposite direction.

A vehicle includes wheels, brakes to control speeds of the wheels, and a hydraulic fluid source in fluid communication with the brakes. The vehicle includes a computer storing instructions to determine that speeds of the wheels are zero and actuate the hydraulic fluid source to provide hydraulic fluid to a first set of one or more of the brakes at a first pressure sufficient to maintain the vehicle body at a present position and to provide hydraulic fluid at a volumetric rate to one or more of the brakes not in the first set, and, while providing hydraulic fluid at the volumetric rate to a brake not in the first set, detect second pressures of the brake not in the first set. The instructions include instructions to determine a volume-pressure curve for the brake not in the first set based on the volumetric rate and the second pressures.