Driving assistance device

Abstract

A driving assistance device (1) that learns travel data during a time in which a driver performs acceleration and deceleration operations to make a vehicle travel, and performs driving assistance based on learning vehicle speeds, including: storage means (20, 41) for storing a vehicle speed and an acceleration and deceleration tendency at the same place on a travel route respectively for a plurality of times during a time in which the driver performs the acceleration and deceleration operation; learning means (44) for identifying a plurality of learnable vehicle speeds from a plurality of vehicle speeds at the same place based on the acceleration and deceleration tendency, and learns vehicle speeds based on plurality of vehicle speeds when the dispersion of plurality of vehicle speeds identified as learnable is small; and driving assistance means (30, 31, 32, 33, 45, 46) for performing driving assistance based on learning vehicle speeds when the vehicle travels at a place where the vehicle speed is learned after learning.

Description

technical field [0001] The present invention relates to a driving assistance device that learns driving data during a period when a driver performs a driving operation to drive a vehicle, and performs driving assistance based on the learning result. Background technique [0002] Various devices for assisting a driver of a vehicle have been developed, and there is one device that performs driving assistance such as travel control to make the vehicle speed a target vehicle speed. As the target vehicle speed, there is a case in which vehicle speed data during a period in which the vehicle is driven by the driver's driving operation is stored, and the vehicle speed data is learned to set the target vehicle speed. As driving assistance using vehicle speed data generated by the driver's driving operation, for example, Japanese Patent Application Laid-Open No. 2010-89698 discloses that the vehicle speed at each position of the vehicle during the period when the vehicle is driven by...

AI Technical Summary

Problems solved by technology

Since the deviation of the vehicle speed is small at such a position, if all the vehicle speed data are used for learning, the vehicle speed data with low reliability will be used for learning.

As a result, when driving assistance is performed using the learned target vehicle speed, there is a possibility that the driving assistance may be different from the driver's intention at this position.

Especially in the case of general roads, the tendency of acceleration and deceleration due to the driver's driving operation is likely to change due to changes in the surrounding environment or occurrence of disturbances even at the same position.

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