Mazda Motor Corporation

Hirohito Yasumatsu

Tetsuhiro Yamashita

Kouji Hosoda

Kiyonobu Takahashi

Takashi Goto

Takanori Kume

Ryota Mitote

Takashi Osaki

Takanori Kadoma

A brake device includes: a battery connected to a power supply line; a fluid pressure unit driven by power from the supply line and applies fluid pressure to a brake; an alternator that receives power from a vehicle engine and generates power at a voltage higher than a charged voltage of the battery; a capacitor that stores the power generated by the alternator; and a DC/DC converter that converts the voltage of the capacitor to a predetermined value and supplies the converted voltage to the supply line. When the vehicle will potentially collide with a forward obstacle, an output of the DC/DC converter is set at a target higher than an output voltage in a normal state before brake actuation, or if output of the DC/DC converter cannot be set at the target voltage, the alternator is driven to connect a generation voltage of the alternator to the supply line.

Automatic brake device

A braking device for a vehicle comprises an accelerator-opening detector, a distance detector, an obstacle detector, and an ECU which is configured to perform the process of executing automatic braking when the distance detected by the distance detector is a specified distance or less during traveling of the vehicle, cancelling the automatic braking when the accelerator opening detected by the accelerator-opening detector is a specified opening or greater, and prohibiting the cancelling of the automatic braking when the front obstacle is detected by the obstacle detector while the vehicle stops or travels at a low speed which is a specified speed or less. Thereby, the braking device for a vehicle which can surely reduce the damage caused by the vehicle's collision with the front obstacle can be provided.

Braking device for vehicle

Growing community of inventors

Hiroshima, Japan

Hirohito Yasumatsu