A trailer assist system for a vehicle includes a camera disposed at the vehicle and viewing at least rearward of the vehicle including at least a portion of a trailer hitched to the vehicle. A control includes an image processor operable to process image data captured by the camera. The control, responsive to image processing at the control of captured image data, determines at least two feature points on the trailer and determines at least two matched feature point pairs from feature matching over two or more frames of captured image data. The control determines a perpendicular bisector of a respective line segment extending between the determined at least two matched point pairs, (iii) determines an intersection point of the perpendicular bisectors of the determined at least two matched point pairs, and (iv) determines a location of the hitch ball based at least in part on the intersection point.

A vehicular trailering assist system includes at least one camera disposed at a trailer hitched to a hitch of a vehicle, and an electronic control unit (ECU). The ECU determines, during a first stage of a calibration maneuver of the vehicle and trailer, image coordinates of at least one ground feature point. The ECU, responsive to determining image coordinates of the at least one ground feature point, estimates orientation parameters of the camera based at least on the determined image coordinates and known intrinsic camera parameters. Responsive to estimating the orientation parameters of the camera, and based on the determined parameters of the camera, the ECU determines location of the at least one camera at the trailer.

Disclosed are systems that include a controller circuit in communication with a ranging sensor configured to detect objects proximate to a host vehicle. In an aspect, the controller circuit is configured to perform a first detection count of the detected objects, determine a first group of objects of the detected objects, determine a first distance to the first group of objects, utilize the first distance to determine a trailer distance between the host vehicle and a front of a trailer, determine a second group of objects of the detected objects, determine a second distance to the second group of objects, utilize the second distance to determine an axle distance between the front of the trailer and a trailer axle, and determine a trailer length based on the trailer distance and the axle distance. Methods are also disclosed.

A method and system for operating a vehicle's trailer reverse assist system is disclosed, including receiving vehicle sensor system data from one or more sensors supported by the vehicle. Based upon the received vehicle sensor data, a trailer pitch angle and a trailer roll angle of a coupled trailer are estimated relative to the vehicle. Surface unevenness of a surface traversed by the vehicle and the trailer is estimated, based upon the estimated trailer pitch angle and the estimated trailer roll angle. One or more parameters of the trailer reverse assist system or of the tow vehicle are adjusted based upon the estimated road surface variance. The trailer reverse assist system of the tow vehicle is subsequently operated using the adjusted one or more parameters.

A parked freight trailer stabilizer and restraint comprising: (a) a kingpin receiver configured to lock onto a kingpin of a parked freight trailer; (b) a jack operatively coupled to the kingpin receiver, the jack repositionable between a retracted position and an extended position; (c) a tail hold operatively coupled to the kingpin receiver, the tail hold repositionable between a stowed position and a restraining position, the tail hold configured to engage a ground mount; and, (d) a transport receiver configured to engage a transport vehicle.

The present invention relates to entering data into a trailer backup guidance system. In particular, the present invention relates to storing data in the components of a trailer backup guidance system corresponding to a plurality of trailer and vehicle combinations to better facilitate sharing those components across a plurality of trailers and vehicles.

The present invention relates to display means for systems for guiding a trailer while backing, and in particular to graphical display means to provide information to an operator who is steering, and controlling the accelerator and brakes by suggesting the amount of steering to apply to the towing vehicle to cause the trailer to be directed to where the operator wants the trailer to go.

A periphery monitoring device includes a coupling determiner that determines whether a towed vehicle is coupled to a towing vehicle to which the towed vehicle can be coupled; a target setter that sets a target moving position to be a target for moving at least the towed vehicle coupled to the towing vehicle; a storing controller that stores, as a moving target image, an image, including the target moving position, of a peripheral image generated by as imager provided at the towing vehicle; and an image controller that displays the stored moving target image in association with the towing vehicle or the towed vehicle included in a current image generated by the imager and currently displayed on a display device.

The present disclosure relates to a method for determining the yaw angle of a trailer with respect to the longitudinal axis of a towing vehicle based on at least one feature included in multiple captured images by using correction information.

A vehicle and trailer display system is disclosed. The display system includes a plurality of imaging devices disposed on the vehicle, each having a field of view. The display system further includes a screen disposed in the vehicle operable to display images from the imaging devices. A controller is in communication with the imaging devices and the screen and is operable to receive a hitch angle corresponding to the angle between the vehicle and the trailer. Based on the hitch angle, the controller is operable to select a field of view of an imaging device to display on the screen.