A controller comprises an electronic communication line configured to receive a system brake request control signal representing a requested system brake application and an identified urgency. A hardware processor, configured to perform a predefined set of basic operations in response to receiving the system brake request control signal, is capable of: determining a maximum braking pressure to be applied during the system braking application based on the identified urgency; generating a first system brake mode control signal, based on the determined maximum braking pressure, to set an associated first valve to a first valve state; generating a second system brake mode control signal, based on the determined maximum braking pressure, to set an associated second valve to a second valve state, the maximum braking pressure during the system braking application being set by the first valve state and the second valve state; determining an activation profile for an associated modulator based on the determined maximum braking pressure; the controller transmitting, via the electronic communication line, the first system brake mode control signal, the second system brake mode control signal and modulator control signals according to the activation profile.

Transportable system for the diagnosis, evaluation and prediction of leakages in hydraulic circuits of low pressure between 0 to 7 bar and of high pressure from 0 to 170 bar, quickly and safely for the operator is provided having a first independent circuit of high pressure and low flow and a second independent circuit of low pressure and high flow wherein the first independent circuit comprises: a first pressure subsystem, which delivers pressure to a first 4/3 valve with ports A, B, P and T, which is actuated by first solenoids, to deliver pressure to a first coupling A or to a first coupling B, in fluid communication with the ports A and B of the first 4/3 valve respectively a computer arranged to control the pressure of each pressure subsystem and associated method.

System for reducing the brake wear of heavy vehicles, in particular for public transportation or for garbage collection, the vehicle comprising a pneumatic braking system for the actuation of the brakes, the wear reducing system being characterized in comprising limiting means, suitable to be activated, for limiting the air pressure within the pneumatic braking system.

An automatic braking system and method are provided for controlling the automatic operation of a pneumatic (air) brake system installed on commercial highway vehicles and the like, particular heavy trucks and buses. When a possible collision is detected or an object is detected in proximity to at least one side and/or end of the vehicle, the system automatically operates the existing, factory installed air braking system of the vehicle to avoid a collision or mitigate the collision impact by concurrently pressurizing each of the rear and front pneumatic service brakes of the vehicle. Pressing the existing vehicle brake pedal deactivates the automatic braking system, thereby permitting the driver to take over control of braking at any time.

A vehicle brake system having electronic pressure regulation and a related method, in which the system stabilizes a vehicle, supports the actuation of the brake system, and/or enables a fully/partly automated driving operation. The system has a primary actuator system that sets/regulates different brake pressures at the wheel brakes, and an electronically controllable secondary actuator system that secures the vehicle brake system against primary actuator failure. For a primary actuator error, the secondary actuator is controlled so that the secondary system produces a brake pressure that, based on the dynamic axle load displacement, occurring during a braking process, in the direction of a front axle, is greater than the brake pressure that is convertable into a rear axle wheel brake braking power. A device reduces this brake pressure at the rear axle wheel brake to a value at which the vehicle wheel, assigned to this wheel brake, does not lock.

A braking force control apparatus is provided which has a first system including a first upstream braking actuator and a first downstream braking actuator, a second system including a second upstream braking actuator and a second downstream braking actuator, and a control unit. When the downstream braking actuator is abnormal and the upstream pressure can be supplied to braking force generating devices, but a braking pressure of any one of the wheels cannot be normally controlled, the control unit select the pressure increasing side control mode out of the front wheel control modes as a first prescribed control mode, select the pressure decreasing side control mode out of the rear wheel control modes as a second prescribed control mode, and to control the first and second upstream pressures in the first and second prescribed control modes.

An apparatus and method for automatic actuation and control of an air braking system on a commercial vehicle, under a warning of collision conditions, has multiple stages of operation, which supplements the normal brake pedal activation and control of the air brake operation under the driver's foot control. Automatic actuation has two stages: (1) impending collision automatic activation and control for 1.4 second closure; and (2) imminent collision automatic activation and control for 0.9 seconds closure. A determination of closure occurring in excess of 1.6 seconds, turns off the warning, and also deactivates the automatic activation and control. A modification to a standard air brake system structure enables the addition of the automatic activation and control stages. When an impending collision signal is received, an activation component operates valves to pressurize the rear brakes to 40 psi. When the air pressure at the rear brakes rises to 20 psi, other valves pressurize the front brakes. This first stage automatic operation stops or slows the vehicle with 40 psi on the rear brakes and 20 psi on the front brakes. When an imminent collision signal is received, the activation component opens valves to pressurize the rear brakes to 120 psi. Once the air pressure at the rear brakes rises to 20 psi, the front brakes are also pressurized. This second stage automatic operation stops the vehicle with 120 psi on the rear brakes and 80 psi on the front brakes, unless restricted to a lower pressure by the brake system manufacturer. The driver can deactivate the automatic braking functions by stepping on the brake pedal or by operating the vehicle turn signals.

A method for operating a motor vehicle brake installation. An electrically controllable pressure modulation device having a pump-valve arrangement is hydraulically arranged between the primary brake system and the front axle brakes. The pump-valve arrangement includes, for each front brake, a first valve, arranged between the inlet valve of the primary brake system and the brake, and an electrically activatable pump, with a suction and pressures ports. The pressure port is connected to the brake. In the presence of a predetermined condition of the primary brake system and of an actuation of the master brake cylinder by the driver, a build-up of brake pressure at the front axle brakes is performed by the pump-valve arrangement. The pressure set by the pump-valve arrangement is higher than the brake pressure in the master brake cylinder, whereas the brake pressure of the master brake cylinder prevails at the brakes of the rear axle.

A method for operating a hydraulic braking system of a motor vehicle includes generating a force for displacing a brake piston of a wheel brake of the brake system via a pressure generator and an electromechanical actuator to actuate the wheel brake. The pressure generator and the actuator are controlled to collectively generate a total clamping force at the wheel brake in order to enable a parking brake function. During the enabling procedure, an operating current of the actuator is monitored to determine a functional capability of the braking system, and the pressure generator is controlled such that the hydraulic pressure is modulated for a predeterminable period of time to unload or to load the actuator. The operating current of the actuator during this time period in order to determine the functional capability of the braking system.

A braking control device includes: a control unit that is configured to control front-wheel braking power and rear-wheel braking power based on braking power distribution and requested braking power; a distribution setting unit that is configured to set the braking power distribution; and a slip judgment unit that is configured to judge whether or not the vehicle is in a rear-wheel-led slip state. If it is judged that the vehicle is in the rear-wheel-led slip state when the braking power distribution is first braking power distribution, the distribution setting unit executes a distribution shifting process of shifting the braking power distribution to second braking power distribution within a predetermined period. The second braking power distribution is such distribution that the rear-wheel braking power is reduced relative to that observed when the first braking power distribution is set as the braking power distribution.