| 摘要 |
A motor reverse system for a motor driven vehicle closure member such as a window comprises filters (6 and 7), comparators (8 and 10), a sample and hold circuit (9) and a backoff circuit (11). The backoff circuit is activated to reverse the motor through a further circuit (12) in two modes of operation. In the first mode, activation occurs when the signal in the motor exceeds that from the sample and hold circuit produced by storing the peak stall current on motor switch on. In the second mode, activation occurs when the output from the filters cross over. The first and second modes correspond to resistance to member closure due to the presence of a soft and hard obstacle respectively. |
