A drag braking system and method for a model vehicle are provided. The drag braking system may include a transmitter comprising a throttle input and a motor control device. The motor control device may include a user activated operation set selector and a memory storing at least two braking profiles. A first or second braking profile is selected via operation of the operation set selector and a braking force is applied by a motor of the model vehicle according to the braking profile selected. The method may include activating a user activated operation set selector and selecting a program setup mode or a profile selection mode. The method may further include setting a neutral position for a throttle input and selecting a braking profile. Wherein the braking profile applies a braking force via a model vehicle motor when the throttle input is in the neutral position.

A vehicle motion management (VMM) system for a heavy-duty vehicle, configured to obtain a desired wheel force value of a wheel of the vehicle; determine a torque limit for a first motion support device (MSD) associated with the wheel based on the desired wheel force value; determine a tire model based on a relationship between wheel force and wheel speed of the wheel; determine a desired wheel speed for the first MSD based on the tire model; and determine a torque fill request for a second MSD of the vehicle based on the desired wheel force and on a torque capability of the first MSD. The VMM system determines the torque fill request for the second MSD in dependence of the torque limit for the first MSD in case the operating torque of the first MSD is limited by the torque limit, and to determine the torque fill request for the second MSD in dependence of an applied torque status signal in case the operating torque of the first MSD is not limited by the torque limit.

A method of controlling cooling of a brake system, includes determining a brake temperature, obtaining a wear rate profile for the brake system indicative of wear rate in dependence on temperature, and controlling activation of cooling of the brake system according to the wear rate profile.

A brake temperature monitoring system configured to monitor at least one of a rotor and hydraulic fluid of a brake mechanism for a vehicle. The system including a controller including a processor and an electronic storage medium, a vehicle velocity sensor, an ambient temperature sensor, and a pre-programmed module. The vehicle velocity sensor is configured to output a velocity signal to the processor. The ambient temperature sensor is configured to output an ambient temperature signal to the processor. The model is pre-programmed into the electronic storage medium, and is adapted to estimate the temperature of at least one of the rotor and the hydraulic fluid. The estimation is based on an ambient air temperature, and a pre-established relationship between a conductive heat transfer factor and a convective heat transfer factor. The convective heat transfer factor is a function of vehicle velocity.

A braking force control device includes a target acceleration calculation unit that calculates a first target acceleration based on an acquired operation amount of an accelerator pedal, a powertrain capability acquisition unit that acquires a braking force that is generable by a powertrain, and an instruction unit that instructs generation of braking forces in the powertrain and a brake. The instruction unit is configured to, when a first braking force for achieving the first target acceleration is equal to or less than the braking force that is generable by the powertrain, instruct a controller of the powertrain to generate the first braking force, and when the first braking force is larger than the braking force that is generable by the powertrain, instruct the controller of the powertrain to generate the braking force that is generable by the powertrain.

Methods and systems for autonomously steering a moving vehicle are disclosed. A processor determines a longitudinal velocity, a longitudinal acceleration, a lateral acceleration, and a yaw rate of the vehicle. The processor estimates, based on the longitudinal velocity, lateral acceleration, and yaw rate of the vehicle, a change in lateral velocity over time. The processor estimates, based on the change in the lateral velocity over time, the yaw rate, a distance between the front axle of the vehicle and a center of gravity of the vehicle, and a distance between the rear axle of the vehicle and the center of gravity of the vehicle, a lateral front velocity of the vehicle and a lateral rear velocity of the vehicle. Using calculations, a state estimation model for the vehicle is updated by the processor using a lateral acceleration bias. The updated state estimation model is used to autonomously steer the vehicle.

A method for ascertaining a leakage in a hydraulic braking system of a motor vehicle, the braking system including at least one hydraulically actuatable wheel brake, at least one pressure generator and at least one discharge valve which is assigned to the wheel brake and actuated as a function of a driving situation of the motor vehicle to maintain driving stability, and a hydraulic volume of the braking system being monitored. It is provided that the leakage is ascertained as a function of the ascertained hydraulic volume and as a function of an actuation of the discharge valve.

Method for updating at least one vehicle model parameter and at least one tire parameter in at least one chassis control unit of a vehicle, based on tire sensor information collected by a tire sensor placed on a tire. The method includes the steps of: collecting tire sensor information; updating the at least one vehicle model parameter based on updating at least one tire parameter, updating one tire parameter being based on the tire sensor information.

A method for controlling deceleration of a vehicle is provided. The vehicle has a braking system having a braking actuation lever, a braking actuator, and at least one braking device. The method involves measuring a current lever position of the braking actuation lever and a current lever speed of the braking actuation lever, dynamically mapping the current lever position and the current lever speed, processing a deceleration curve as a function of the dynamic mapping, and decelerating the vehicle according to the deceleration curve for each current lever position measured in a lever stroke.

A braking system includes: brake circuits independently activated and deactivated and when activated apply braking force at respective wheels; a braking stability module detecting an issue or a failure with a first one of the brake circuits where an unexpected amount of braking torque is being applied as compared to an amount of braking torque applied at a second one of the brake circuits, and mitigating effect of the unexpected amount of braking torque on a yaw rate of the vehicle by i) adjusting the braking torque of the first one of the brake circuits, ii) adjusting braking torque of the second one of the brake circuits, and/or iii) deactivating the first one of the brake circuits and modulating braking torque of the second one of the brake circuits, to compensate for the unexpected amount of braking torque.