A braking system (200) is described for at least one vehicle (V), particularly at least one railway vehicle, comprising control means arranged to: a) determine a real instantaneous deceleration value of the vehicle during the actuation of braking means (202); b) determine a real friction value between braking means and at least one wheel or at least one disc, as a function of at least said real instantaneous deceleration value, a test mass value of the vehicle and a value of an actuation signal; c) replace a predetermined expected friction value stored in the storage medium (210, 210) with the determined real friction value.

Further described is a system for calibrating a braking system of at least one vehicle, and a process for calibrating a braking system of at least one vehicle (V), and vehicles.

A brake system includes a master cylinder, a first solenoid valve, a stroke simulator, a slave cylinder apparatus, and a control apparatus. The master cylinder generates a brake hydraulic pressure in response to an operation on a brake operator. The first solenoid valve is provided between the master cylinder and a wheel brake. The stroke simulator is connected to the master cylinder through a second solenoid valve. The slave cylinder apparatus includes an electric actuator and a cylinder mechanism. The cylinder mechanism generates a brake hydraulic pressure. The control apparatus closes the first solenoid valve and opens the second solenoid valve when the brake hydraulic pressure is increased by the electric actuator. The control apparatus controls the electric actuator so that the larger a carried load on a vehicle is, the larger the brake hydraulic pressure is.

A brake system includes a master cylinder, a first solenoid valve, a stroke simulator, a slave cylinder apparatus, and a control apparatus. The master cylinder generates a brake hydraulic pressure in response to an operation on a brake operator. The first solenoid valve is provided between the master cylinder and a wheel brake. The stroke simulator is connected to the master cylinder through a second solenoid valve. The slave cylinder apparatus includes an electric actuator and a cylinder mechanism. The cylinder mechanism generates a brake hydraulic pressure. The control apparatus closes the first solenoid valve and opens the second solenoid valve when the brake hydraulic pressure is increased by the electric actuator. The control apparatus controls the electric actuator so that the larger a carried load on a vehicle is, the larger the brake hydraulic pressure is.

An adjustment arrangement for an empty/load valve includes a body defining a channel, an adjustment beam slidably retained within the channel, and an adjustment handle connected to the adjustment beam. The adjustment handle may be configured to move between at least two positions. The adjustment handle may be configured to move the adjustment beam to at least two positions. The adjustment handle may be connected to the adjustment beam via a pin that extends through the adjustment handle and into the adjustment beam. The adjustment beam may include a protrusion that extends from the adjustment beam to act as a contact point.

A braking distance control device employed for an electrically driven work vehicle includes a safety vehicle speed calculation unit 9 that calculates a safety vehicle speed at which a braking distance provided by use of an electric brake device becomes less than or equal to a threshold value, based on gradient information, payload information, road surface friction information, vehicle speed information, and a braking torque characteristic of electric motors. Preferably, the braking distance control device includes: a critical vehicle speed for deceleration calculation unit 5 that calculates a critical vehicle speed for deceleration at which deceleration provided by use of the electric brake device becomes less than or equal to a threshold value; a vehicle speed judgment unit 8 that judges whether the work vehicle can be stopped within a set distance by the electric brake device, based on result of comparing the vehicle speed information with the safety vehicle speed and the critical vehicle speed for deceleration; a notification command unit 17 that calls the operator's attention or prompts a brake operation, based on the result of the judgment; an operation judgment unit 14 that judges a setting of notification, based on pedal operation amounts; and a logical product calculation unit 15 that outputs a setting of a notification operation, based on result of the judgments by the vehicle speed judgment unit 8 and the operation judgment unit 14.

A braking distance control device employed for an electrically driven work vehicle includes a safety vehicle speed calculation unit 9 that calculates a safety vehicle speed at which a braking distance provided by use of an electric brake device becomes less than or equal to a threshold value, based on gradient information, payload information, road surface friction information, vehicle speed information, and a braking torque characteristic of electric motors. Preferably, the braking distance control device includes: a critical vehicle speed for deceleration calculation unit 5 that calculates a critical vehicle speed for deceleration at which deceleration provided by use of the electric brake device becomes less than or equal to a threshold value; a vehicle speed judgment unit 8 that judges whether the work vehicle can be stopped within a set distance by the electric brake device, based on result of comparing the vehicle speed information with the safety vehicle speed and the critical vehicle speed for deceleration; a notification command unit 17 that calls the operator's attention or prompts a brake operation, based on the result of the judgment; an operation judgment unit 14 that judges a setting of notification, based on pedal operation amounts; and a logical product calculation unit 15 that outputs a setting of a notification operation, based on result of the judgments by the vehicle speed judgment unit 8 and the operation judgment unit 14.

Disclosed herein an electric parking brake (EPB) system including a motor actuator operated by an electric motor includes a motor driving circuit configured to drive the electric motor; a current sensor detecting a current flowing through the electric motor; a voltage sensor detecting a voltage input to the electric motor; and a controller configured to determine a total energy consumption based on the current and voltage of the electric motor during a parking operation, determine whether a target current of a parking operation mode needs to be changed in response to the determined total energy consumption, in response to determining that the target current needs to be changed, change the target current based on at least one of a period of use and the number of times of operation of the EPB system, and control the electric motor in response to the changed target current.

Embodiments are presented for trailer sway detection and braking distribution using a camera mirror system. In one embodiment, a vehicle controller is provided comprising: one or more processors; a non-transitory computer-readable medium; and program instructions stored on the non-transitory computer-readable medium. The program instructions, when executed by the one or more processors, cause the one or more processors to: monitor images captured by at least one image capture device to detect sway of a plurality of trailers being towed by a tractor; estimate a relative weight of each of the plurality of trailers based on the detected sway; determine braking force to apply to each of the plurality of trailers based on the estimated relative weight of each of the plurality of trailers; and send an electronic signal to a braking system of each of the plurality of trailers to apply the determined braking force to each of the plurality of trailers.

A bearing raceway ring (25) disposed near a mounting section (9) is disposed on the outer periphery of a circular cylinder section (19). A fluid-sealed chamber (40) in which a measurement liquid is hermetically enclosed is provided between a first member (8) and the bearing raceway ring (25) which is disposed near the mounting section (9). Pressure acting on the fluid to be measured changes as the bearing raceway ring (25) moves in the cylinder-axis direction, the bearing raceway ring (25) being disposed near the mounting section (9). The fluid-sealed chamber (40) is provided with a pressure sensor (44) capable of detecting a change in the pressure of the fluid to be measured.

An electro-pneumatic braking system including a pneumatic pressure supply pipe, a generator for generating a vehicle load signal, a weighting system designed to supply a weighted pressure which defines a maximum braking pressure, limited as a function of the load signal, and braking control units connected to the weighting system and having a relay valve connected between the pipe and at least one brake cylinder, to cause the application to this cylinder of a controllable braking pressure, equal to or less than the weighted pressure. The weighting system includes an electro-pneumatic drive assembly, interposed between the pipe and the drive inlet of the relay valve and is connected to the pipe through a pressure limiter, and an electronic weighting control unit which controls this drive assembly as a function of the load signal, so as to modulate in predetermined ways the pressure at the drive inlet of the relay valve.