Hitachi, Ltd.

Nobuyuki Ueki

Toshio Manaka

Atsushi Yokoyama

Kenichiro Matsubara

Takaomi Nishigaito

Yuzo Kadomukai

Masanori Ichinose

Toshimichi Minowa

Hiroshi Kuroda

Shiho Izumi

Satoru Kuragaki

Tokuji Yoshikawa

Kazuaki Takano

Takao Kojima

A brake device includes an actuator which is provided on a wheel side of a vehicle having a suspension, the actuator generates a braking force by being electrically driven. A drive controller is also provided for receiving a signal regarding the braking force from a vehicle motion controller and sensors, and driving the actuator accordingly. To reduce the number of high cost bending wires necessary to communicate between the sensors, the drive controller and the vehicle motion controller, the drive controller and the sensors are attached to the actuator side (unspring-mass).

Brake device for vehicle

A power-supply unit for automobiles, connected to an electrically-driven brake device which generates braking forces by being electrically driven, an electric generator capable of generating braking forces for a vehicle by power generation, and a storage device for storing electric power, the power-supply unit comprising a first power supply line for connecting the electric generator with the storage device, a second power supply line for connecting the first power supply line with the electrically-driven brake device, and power-source connection means provided on the second power supply line and have interrupting function.

Power supply unit for automobiles, which can provide braking force even when abnormality occurs in the power supply unit of electrically driven brake devices

An electrically driven brake device includes a plurality of brake actuators for generating braking force when driven electrically, a power supply source for storing electric energy and supplying power to the brake actuators, a power source line for connecting the power supply source and the brake actuators, and a power breaker at a position of the power source line at which the brake actuators can be insulated and separated into at least two systems.

Electrically driven brake device and control apparatus thereof

In a vehicular control device, it is necessary to measure or calculate six physical quantities-forward-reverse speed, left-right speed, vertical speed, pitch angle, roll angle, and angle of sideslip-representing vehicular movement and to control the braking force of each wheel and/or the damping coefficient of each suspension shock absorber in order to further shorten braking distance particularly at the time of braking and to prevent spin at that time. In this case, it is necessary to furnish sensors to measure speed and angle directly. In the present invention, four radar sensors are used in order to directly measure the forward-reverse speed and the left-right speed. Also, the vertical speed, the pitch angle, the roll angle, and the angle of sideslip are indirectly measured from the output of the radar sensors. By using three or four radar sensors, six physical quantities&#x2014;the forward speed, the left-right direction speed, the vertical speed, the angle of sideslip, the pitch angle, and the roll angle&#x2014;can be measured. Also, by using two radar sensors, three physical quantities&#x2014;the forward speed, the left-right speed, and the angle of sideslip&#x2014;can be measured.

Vehicular travel control device

A brake device includes an actuator which is provided on a wheel side of a vehicle having a suspension, the actuator generates a braking force by being electrically driven. A drive controller is also provided for receiving a signal regarding the braking force from a vehicle motion controller and sensors, and driving the actuator accordingly. To reduce the number of high cost bending wires necessary to communicate between the sensors, the drive controller and the vehicle motion controller, the drive controller and the sensors are attached to the actuator side (unspring-mass) and the drive controllercommunicates with the vehicle motion controller provided on the vehicle body side (spring-mass) of the vehicle by bidirectional multiplex communication.

A power supply system for a vehicle is provided which is able to supply an electric brake apparatus with necessary power even if an abnormal condition occurs in a battery or a conductor which is connected to the electric brake apparatus. A relay control unit normally brings a relay in a state in which its input terminal is connected to an A terminal . This causes a generator or main battery to supply an electric brake apparatus with power via first and second power supply lines and and charges an auxiliary battery . If an abnormal condition occurs at main and auxiliary batteries and , main and auxiliary power supply lines and , first and second power supply lines and , the relay control unit brings the relay into a state in which its input terminal is connected to A or B terminal or in response to the abnormal condition.

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Sagamihara, Japan

Nobuyuki Ueki