Systems and methods are provided for controlling operation of a trailer brake system associated with an agricultural vehicle, comprising: determining a coupling force associated with a coupling point for providing a coupling between the vehicle and a trailer, determining, in dependence on the coupling force, the presence of a trailer coupled to the vehicle at the coupling point; and controlling one or more components of the vehicle in dependence on the determination of the presence of the trailer.

The present disclosure relates to a method for determining a tractor longitudinal force threshold

[00001]$\left(F_{L_{\mathrm{TR}}}^{\mathrm{ret},\mathrm{threshold}}\right)$

for a tractor longitudinal retardation force

[00002]$\left(F_{L_{\mathrm{TR}}}^{\mathrm{ret}}\right)$

that can be imparted on a tractor of a vehicle combination including the tractor and a trailer for retarding the vehicle combination. The trailer has a trailer longitudinal extension in a trailer longitudinal direction (L.sub.TL), a trailer lateral extension in a trailer lateral direction (T.sub.TL) and a trailer vertical extension in a trailer vertical direction (V.sub.TL), and the tractor has a tractor longitudinal extension in a tractor longitudinal direction (L.sub.TR), a tractor lateral extension in a tractor lateral direction (T.sub.TR) and a tractor vertical extension in a tractor vertical direction (V.sub.TR ), wherein the tractor longitudinal retardation force

[00003]$\left(F_{L_{\mathrm{TR}}}^{\mathrm{ret}}\right)$

extends in a direction parallel to a tractor longitudinal direction (T.sub.TR).

An autonomous emergency braking system includes a sensor generating a collision risk signal indicative of an object in a path of travel of the vehicle and a controller. The controller determines whether an indication of a mass of the vehicle is present and, if so, adjusts a default deceleration value corresponding to a predetermined rate of deceleration for the vehicle in response to the mass to obtain a mass-adjusted deceleration value. The controller establishes, responsive to the mass-adjusted deceleration value, successive times for generating first and second braking commands to an engine or brake controller or increasing braking forces for the first and second braking commands configured to cause deceleration of the vehicle at first and second rates of deceleration, the second rate greater than the first. The first and second braking commands are generated responsive to the collision risk signal.

A trailer spring brake valve is provided for a vehicle air braking system. The trailer spring brake valve comprises a number of components arranged to cooperate together to provide type of brake priority based upon trailer weight.

A brake control system is for a vehicle containing an internal controller for outputting an internal control variable for at least one brake actuator. An interface receives an external control variable for the at least one brake actuator from an external controller. A decision circuit has at least two inputs for receiving the internal control variable and the external control variable and an output for outputting a control signal for the at least one brake actuator. The control signal depends on the received internal control variable and/or the received external control variable.

A brake control system is for a vehicle containing an internal controller for outputting an internal control variable for at least one brake actuator. An interface receives an external control variable for the at least one brake actuator from an external controller. A decision circuit has at least two inputs for receiving the internal control variable and the external control variable and an output for outputting a control signal for the at least one brake actuator. The control signal depends on the received internal control variable and/or the received external control variable.

In a method for actuating a brake actuator in a braked, stationary vehicle, a state variable defining a state of loading of the vehicle is monitored and a stress in the vehicle produced by a level change is detected. The state variable is compared with a predefined value range and the brake actuator is released in response to the detection of a stress. For the case wherein the state variable can be assigned to the predefined value range, a first target braking level is actuated and/or, for the case in which the state variable cannot be assigned to the predefined value range, a second target braking level is actuated.

Methods for determining or estimating a first brake pressure for a first brake actuator. Methods are directed towards, for example, situations where a pressure-medium-actuated brake device of at least one first wheel, at which a brake-pressure buildup is necessary during a braking operation, at which for example, there is no first wheel-speed sensor. Methods are also directed towards situations, for example, where a first wheel-speed sensor does not produce a first wheel-speed signal. Methods include determining, measuring, or estimating, during the braking operation and/or during the execution of the controlling operation, a second brake pressure for a second brake actuator.

An aircraft system for an aircraft having a controller configured to determine, based on a criterion indicative of an aircraft condition or a runway condition, a maximum braking level able to be applied to a brake of the aircraft in an emergency braking mode, wherein the maximum braking level is determined to be a first maximum braking level when a value of the criterion is above a pre-determined threshold and a second maximum braking level when a value of the criterion is no greater than the pre-determined threshold.

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.