ACC system has been developed and carries out the spread of various vehicles. This paper explains MT vehicle equipped with outline of ACC along with the investigation and the results of driving tests. Especially the mental workload reduction was evaluated. In addition, characteristic problems and its solutions were introduced in this paper. In recent years, ACC is put in practical use and has been amounted on various vehicles. Conventionally, the system was applied to the vehicles which are with AT (automatic-transmission) or CVT. For the needs expansion of ACC, we successfully developed one for a MT (manual transmission). Because of the feature of MT operated to the range of a gear position chosen by the driver, the driver is required as making a shift change at an appropriate moment, which is not required on an AT vehicles. As another significant feature of MT vehicles, it can transmit engine torque to tires directly from the clutch without a torque converter. It enables high response control which is not in AT vehicles. On the other hand, it became the subject to realize a smooth vehicle behavior. Therefore, we developed ACC for MT vehicles, which has both a high response and smooth operation by new control method. This paper describes the outline of the validity of ACC for MT vehicles and the technology that realized the smooth vehicle behavior.
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