Control system of vehicle including automatic transmission

A control system of a vehicle, comprising:

• an automatic transmission configured to transmit a driving force of a drive source of the vehicle to driving wheels, provided with a plurality of friction engagement elements changeable between an engaged state and a disengaged state, and configured to form a plurality of gear stages by changing a combination of three friction engagement elements to be selectively engaged among the plurality of friction engagement elements;
• and
• a controller configured to control the change between the engaged state and the disengaged state of each of the plurality of friction engagement elements of the automatic transmission,
• wherein the controller performs a neutral control in which, in order to set the automatic transmission to a neutral state in which the driving force of the drive source is not transmitted to the driving wheels, while two of the three friction engagement elements engaged when forming each of the gear stages of the automatic transmission are kept engaged, the remaining one of the three friction engagement elements is disengaged, and
• wherein the controller performs the neutral control so that the two friction engagement elements engaged during the neutral control are common in at least two adjacent gear stages.