Rotation speed and direction output signals processing method for rotation speed sensor used in automatic gearbox of motor car, involves cutting implausible or invalid rotation direction output signal if difference is larger than value

摘要

The method involves forming a product (3) based on a rotation speed output signal (1) and a rotation direction output signal (2). A gradient (4) is formed from the product. Another gradient (5) is formed based on the speed output signal. A difference (7) is formed from the former gradient and another product (6). A plausible or valid rotation direction output signal (9) is cut if the difference is smaller than a threshold value (8). An implausible or invalid rotation direction output signal (10) is cut if the difference is larger than the value.