Control system for vehicle

A control system for a vehicle, comprising:

• an accelerator pedal and a steering wheel configured to be operated by a driver:
• an accelerator opening sensor configured to detect an accelerator opening corresponding to operation of the accelerator pedal;
• a steering angle sensor configured to detect a steering angle corresponding to operation of the steering wheel;
• and
• a controller configured to set an additional deceleration to be applied to the vehicle in order to control a posture of the vehicle based on the steering angle detected by the steering angle sensor, when the steering wheel is turned, and apply the additional deceleration to the vehicle,
• wherein the controller sets the additional deceleration based also on the accelerator opening detected by the accelerator opening sensor, in addition to the steering angle, and sets the additional deceleration larger while the vehicle is towing than while the vehicle is not towing, when compared at the same accelerator opening,
• wherein the vehicle is comprised of a trailer, a coupler, and a tractor,
• wherein the center of gravity position of the trailer is located forward of an axle thereof so that a given vertical load is applied to the coupler,
• wherein the vehicle is provided with a towing mode selecting switch configured to be turned on by the driver when the trailer is coupled to a rear part of the tractor through the coupler,
• wherein, when the steering wheel is turned, the controller sets the additional deceleration applied to the vehicle larger while the towing mode selecting switch is turned on than while the towing mode selecting switch is turned off,
• wherein the controller includes a first map and a second map defining gains to be used for correcting the additional deceleration calculated according to a steering speed,
• wherein both the first and second maps define the gains so that the gain becomes smaller as the accelerator opening increases, the gain of the second map being larger than the gain of the first map, and
• wherein, when the vehicle is not towing, the controller controls the vehicle so that the additional deceleration is corrected based on the gain calculated based on the first map, and when the vehicle is towing, the controller controls the vehicle so that the additional deceleration is corrected based on the gain calculated based on the second map.