Vehicle with two symmetrical parking and reversing sensors at rear, employs them when trailer is attached, to detect its relative angle

摘要

A sensor (4) detects an attached trailer (5). The proximity sensors (3, 3') work in a first or second operational mode (A, B), i+n accordance with a signal (a, b) from the sensor (4). In mode A, i.e. without trailer, the proximity (D, D') of a rear obstruction (11) is measured, or they act as a parking aid. In mode B, with the trailer attached, they determine the angle (alpha) between the longitudinal axes of vehicle and trailer, as the drawbar of the trailer approaches either sensor.