Vehicle driving support device

Abstract

A driving support ECU for executing constant speed control for controlling a vehicle speed so as to become a set vehicle speed, when the vehicle speed exceeds the set vehicle speed, calculates a target deceleration force for setting the vehicle speed, and controls a deceleration force so that a sum of a power train deceleration force and a service brake deceleration force becomes a target deceleration force. The vehicle driving support device is configured to control a deceleration force so as to be a target deceleration force. The driving support ECU determines an allowance degree of a driver with respect to an increase in an engine rotational speed due to a downshift when a vehicle travels downhill, and controls a ratio according to an allowance degree so that a ratio of a power train deceleration force to a target deceleration force becomes higher as an allowance degree is higher.

Dependencies are inferred from the claim text.