A control system for a vehicle for determining whether a trailer is attached to the vehicle, the system being configured to receive an input of pitch data for the vehicle and to determine from the pitch data whether a trailer is attached to the vehicle.

A method for detecting a movement of a vehicle that has been shut down in a parked state, including: detecting a movement variable which describes a movement of the vehicle, integrating the movement variable, in a manner dependent on a movement direction of the vehicle, to obtain a movement travel, and, if the movement travel meets a predetermined condition, making a decision on the movement for detection.

A trailer backup assist system for a vehicle reversing a trailer includes a brake system and a throttle sensor module outputting a throttle application signal. The system further includes a control module estimating a road grade beneath the trailer and outputting a brake torque request to the brake system based on the estimated road grade and the throttle application signal.

A Hill Start Assist (HSA) system for an off-road type vehicle includes a brake system for producing a braking force sufficient to maintain the vehicle in a stopped condition, and a control unit in communication with the brake system for controlling a brake modulator of the brake system to maintain the braking force when a manual brake actuator of the brake system is in a released position. The HSA system is operable in a ready state where the brake modulator is in an open condition and the braking force is not maintained, an activated state and a hold state where the brake modulator is in a closed condition and the braking force is maintained. The HSA system is only in the ready state upon determination by the control unit that predetermined vehicle conditions are satisfied.

A method of controlling the braking of a vehicle descending a slope. The method includes receiving one or more electrical signals each indicative of a value of a respective vehicle-related parameter. The method further includes detecting that the vehicle is descending a slope based on the value(s) of one or more of the vehicle-related parameters. The method still further includes automatically modifying an amount of brake torque being applied to at least certain of the wheels of the vehicle in response to the detection of the vehicle descending a slope by increasing the amount of brake torque being applied to one or more trailing wheels of the vehicle, and decreasing the amount of brake torque being applied to one or more leading wheels of the vehicle.

The invention relates to a method of controlling a heavy-duty vehicle in a slope when the vehicle has come to a standstill due to service brakes of the vehicle having applied a service brake force, the method comprising determining a total brake force required for maintaining the vehicle at standstill, activating at least one park brake for providing a park brake force, gradually increasing the park brake force, and, while the park brake force is gradually increased, gradually reducing the service brake force while maintaining the sum of the service brake force and the park brake force at least equal to the determined total brake force.

A travel resistance arithmetic device includes: a controller configured to estimate travel resistance which a vehicle receives from a travel road; and a memory configured to store the travel resistance in association with positional information. The controller is configured to: correct, based on difference between a stored value of the travel resistance stored in the memory in association with a predetermined area on the travel road through which the vehicle has already passed and an estimated value of the travel resistance estimated by the controller in the predetermined area, the stored value stored in the memory in association with a correction target area on the travel road and; output the corrected stored value as the travel resistance in the correction target area while the vehicle travels the travel road.

A slope-descending speed control device 10 for a vehicle configured to control a vehicle deceleration so that an actual vehicle speed conforms to a target vehicle speed in accordance with a target deceleration Gxbt of a PID feedback control executed in accordance with a difference between a target vehicle speed Vxt and an actual vehicle speed Vx. In a situation where an actual vehicle speed is higher than a target vehicle speed, with a component in a hill-descending direction of gravitational acceleration of the vehicle at a time point when a condition for starting a slope-descending speed control is satisfied being a reference gravitational acceleration Gxd0, when a difference between a component Gxd in a hill-descending direction of gravitational acceleration and the reference gravitational acceleration Gxd0 is between upper and lower reference values, a target deceleration Gxbti of the integral term is not integrated to restrain its increase.

A method for controlling a rear collision traffic assist brake (RCTB) system of a vehicle includes: receiving information on an ego vehicle and an obstacle; performing braking by calculating the received information and generating a reference braking pressure when a collision with the obstacle is predicted; storing a location of the ego vehicle at a reference point in time for generating the reference braking pressure, a speed of the ego vehicle, an estimated reference collision distance, which is a distance from the ego vehicle to an estimated collision point with the obstacle, and an estimated reference collision time; monitoring whether normal braking is performed based on the stored data; and generating an additional braking pressure to increase a total braking pressure when it is determined that the normal braking is not performed during the monitoring.

A system for measuring motion of a locomotive vehicle includes a speed sensor, a decelerometer and an onboard processing unit. The speed sensor is configured to measure wheel speed of the locomotive vehicle. The decelerometer includes a level-sensitive device configured to measure acceleration or deceleration of the locomotive vehicle as a function of a tilt from a level position. The onboard processing unit computes a current grade traversed by the locomotive vehicle prior to detection of a slip or slide condition based on a first measurement signal from the decelerometer. Upon detection of the slip or slide condition, the onboard processing unit obtains a second measurement signal from the decelerometer and filters out the current grade from the second measurement signal. The onboard processing unit determines an actual acceleration or deceleration of the locomotive vehicle during the slip or slide condition from the filtered second measurement signal from the decelerometer.