Hino Motors, Ltd.

Toshiki Ezoe

Naoshi Ichinose

Hirokazu Okuyama

Masahiro Yamaguchi

Satoshi Hokari

Michiteru Arita

Shuji Narada

An automatic braking control device includes a temperature obtaining section for obtaining an index value of a temperature of brake fluid, a collision prediction time calculation section for calculating collision prediction time of a vehicle with an object, a collision determination section for determining whether the collision prediction time is less than or equal to a threshold, and a pressure control section for controlling a start timing of pressurization of the brake fluid when the collision prediction time is less than or equal to the threshold. The pressure control section sets the start timing to a first timing when the index value is a first temperature and to a second timing when the index value is a second temperature higher than the first temperature. Time from determination of the collision determination section to the first timing is shorter than time from the determination to the second timing.

Automatic braking control device

A stepwise brake control is automatically performed when TTC obtained according to a relative distance and a relative speed between a vehicle and an object is lower than a predetermined value. For example, a brake force or a brake reduction speed is gradually increased over a plurality of stages in time series. Moreover, the affect of speed change control to the automatic brake control is removed. Alternatively, automatic brake control is supported by the speed change control. Alternatively, the friction coefficient state is estimated, and the brake force or the brake speed reduction is adjusted according to the estimated result. Alternatively, an auto-cruse function is invalidated at least the final stage. Alternatively, when the brake force or the brake speed reduction generated by a brake operation by a driver is greater than the brake force or the brake speed reduction generated by the brake control means, the brake operation by the driver is handled with a higher priority than the stepwise brake control.

Automatic brake control device

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Hino, Japan

Toshiki Ezoe