| 摘要 |
An automatic tramsmission control system for a vehicle capable of automatically selecting the most suitable one of a plurality of transmission patterns in accordance with the travelling condition of the vehicle and automatically changing the transmission ratio based on the selected transmission pattern. The system comprises an engine rpm sensor, an engine load condition sensor, a vehicle speed sensor, an automatic transmission apparatus having a plurality of transmission ratios for changing the power transmitted from the engine to the driven wheels of the vehicle, and a control unit having a memory for storing a plurality of transmission patterns which correspond respectively to a plurality of ranges of the running resistance of the vehicle. The control unit receives the output signals of the sensors, calculates the running resistance of the vehicle, selects, based on the thus determined running resistance, a specific one of the transmission patterns stored in the memory which corresponds to the determined running resistance, and changes the transmission ratio of the automatic transmission apparatus making reference to the transmission pattern thus selected. |
