| 摘要 |
A cruise control apparatus for a vehicle can control an automatic transmission such that gear shifting is carried out in accordance with a running resistance of the vehicle while taking account of the slope of a road and the weight of the vehicle, thereby allowing proper and desired speed control. A speed deviation calculator 24 calculates, based on a speed signal and a target speed signal, a deviation between the target speed and the actual vehicle speed and generates a corresponding speed deviation signal. A control quantity calculator 25 calculates a control quantity Tn for controlling a driving force of the vehicle based on the acceleration signal and the speed deviation signal. A throttle valve actuator 11 drives the throttle valve 29 based on the control quantity Tn. A control quantity integrator 27 integrates the control quantity Tn with respect to time based on an output signal from a gear change determiner 26 to thereby simulate a change in the driving force of the vehicle. The gear change determiner 26 determines, based on the acceleration signal, the speed deviation signal and the integrated control quantity, whether the gear ratio of the automatic transmission 28 is to be changed.
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