| 摘要 |
PURPOSE:To prevent hunting and the like by permitting down-shift when the deviation in vehicle speed between an average vehicle speed and the present vehicle speed is larger than a specified threshold while permitting up-shift when the average of the deviation in vehicle speed within a given time is smaller than said threshold. CONSTITUTION:A microcomputer CPU receives the detected signals from a shift position switch SPS, plural speed sensors SP1, SP2 and various sensors for detecting other operating conditions of a vehicle and switches MS, SS, SP, RS, ADS via an input interface circuit IP. And, it outputs specified control signals to an automatic transmission actuator A1 and a constant speed traveling actuator A2 via an output interface circuit OP. In this case, when the deviation in vehicle speed between an average vehicle speed and the present vehicle speed is larger than a specified threshold, down-shift is permitted. Also, when the average of the deviation in vehicle speed within a given time is smaller than the specified threshold, up-shift is permitted.
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