| 摘要 |
An electronic control system for shifting an automotive automatic transmission between two adjacent speed ranges. An electronic circuit or shift pattern generator of the control system includes a trigger circuit having two transistors cascaded and a feedback circuit between the input and output of the trigger circuit. Upon reception of voltage signals representative respectively of engine torque, vehicle speed and, if any, a forced downshift of the transmission, the electronic circuit produces a variety of transmission speed changes or shift patterns, the slope and hysteresis of which can be changed by selecting the resistances of the input resistors and/or of the feedback circuit.
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