Mining the World Wide Web

PCT No. PCT/EP96/03209 Sec. 371 Date Jan. 9, 1998 Sec. 102(e) Date Jan. 9, 1998 PCT Filed Jul. 20, 1996 PCT Pub. No. WO97/05409 PCT Pub. Date Feb. 13, 1997The invention concerns a method of monitoring the gearshift process in an automatic transmission. In order to be able to recognize fault conditions, the invention proposes in one embodiment that the actual change in transmission ratio is compared with a required change in transmission ratio. In another embodiment the change in the difference in the speed of the rotation of the engaging shift element is examined. It is also possible to analyze the gradient of the difference in the speed of rotation of the engaging shift element. A further possibility is to monitor the gradient of the transmission input speed. In addition, the gradient of the speed at the transmission output can be monitored. As result of the analysis, the transmission ratio is either retained or a predetermined safety condition is brought about.