Abstract: This cruise control device enables more accurate prediction of running resistance and prevents worsening of fuel economy. In this device, a coasting prediction unit (12c) of an automatic cruise control device (12), which is for performing cruise control of the vehicle (1) on the basis of a resistance coefficient, predicts, on the basis of the resistance coefficient, the change in vehicle speed if the vehicle (1) were to coast; if the vehicle (1) does coast, a vehicle information acquisition unit (12b) acquires information about the detected vehicle speed; and a running resistance updating unit (12f) updates the value of the resistance coefficient on the basis of the information about the change in vehicle speed predicted by the coasting prediction unit (12c) and information about the vehicle speed acquired by the vehicle information acquisition unit (12b).

Abstract: Provided is a travel control device by which it is possible to further improve fuel economy in a vehicle. A travel control device has the following: a weather information acquisition unit that acquires weather information indicating a weather state of a road on which a vehicle travels; an estimation value switching unit that sets in a modifiable manner an estimation value for travel resistance on the vehicle traveling on the road, according to the acquired weather information; a coasting travel estimation unit that estimates a change in speed of the vehicle on the road on the basis of the estimation value for the set travel resistance; and an automatic travel control unit that generates a travel schedule for the vehicle including driving travel and coasting travel on the basis of the estimated change in the vehicular speed, and causes the vehicle to travel according to the generated travel schedule.

Abstract: An end point speed at an end point of inertial travel that a vehicle is controlled to perform in a short section li is calculated using a weight, a start point speed, slopes, and a horizontal distance, based on a change in energy of the vehicle or an acceleration of the vehicle in the short section. In a case where the calculated end point speed is within a speed range, the vehicle is controlled to perform inertial travel in the short section. In this way, the speed of the vehicle in a case where the vehicle is controlled to perform inertial travel can be accurately calculated and the vehicle can be prevented from deviating from a set speed range at an early stage even when controlled to perform inertial travel, thereby increasing the distance traveled by inertial travel and effectively increasing fuel economy.

Abstract: Provided is a travel control device by which it is possible to improve the fuel economy of a vehicle and reduce the burden on a driver, without impacting ease-of-use for the driver. A travel control device (100) has the following: an automatic travel control unit (110) that causes a vehicle to travel according to a travel schedule including drive travel and coasting travel; a passing detection unit (120) that detects the start of a passing operation in which the vehicle passes another vehicle; and a coasting prohibition processing unit (130) that issues a prohibition on the start of coasting travel to the automatic travel control unit (110) under the condition that the passing operation has started.

Abstract: Provided is a travel control device by which it is possible to further improve fuel economy in a vehicle. A travel control device has the following: a weather information acquisition unit that acquires weather information indicating a weather state of a road on which a vehicle travels; an estimation value switching unit that sets in a modifiable manner an estimation value for travel resistance on the vehicle traveling on the road, according to the acquired weather information; a coasting travel estimation unit that estimates a change in speed of the vehicle on the road on the basis of the estimation value for the set travel resistance; and an automatic travel control unit that generates a travel schedule for the vehicle including driving travel and coasting travel on the basis of the estimated change in the vehicular speed, and causes the vehicle to travel according to the generated travel schedule.

Abstract: This cruise control device enables more accurate prediction of running resistance and prevents worsening of fuel economy. In this device, a coasting prediction unit (12c) of an automatic cruise control device (12), which is for performing cruise control of the vehicle (1) on the basis of a resistance coefficient, predicts, on the basis of the resistance coefficient, the change in vehicle speed if the vehicle (1) were to coast; if the vehicle (1) does coast, a vehicle information acquisition unit (12b) acquires information about the detected vehicle speed; and a running resistance updating unit (12f) updates the value of the resistance coefficient on the basis of the information about the change in vehicle speed predicted by the coasting prediction unit (12c) and information about the vehicle speed acquired by the vehicle information acquisition unit (12b).

Abstract: An end point speed at an end point of inertial travel that a vehicle is controlled to perform in a short section li is calculated using a weight, a start point speed, slopes, and a horizontal distance, based on a change in energy of the vehicle or an acceleration of the vehicle in the short section. In a case where the calculated end point speed is within a speed range, the vehicle is controlled to perform inertial travel in the short section. In this way, the speed of the vehicle in a case where the vehicle is controlled to perform inertial travel can be accurately calculated and the vehicle can be prevented from deviating from a set speed range at an early stage even when controlled to perform inertial travel, thereby increasing the distance traveled by inertial travel and effectively increasing fuel economy.