Yazaki Corporation

Yoshihide Nakamura

Yoshinori Ikuta

Keisuke Ueta

Akinori Maruyama

Shuuji Satake

Yasuyuki Shigezane

Satoshi Morita

Tomohiro Shiozaki

Mitsuaki Morimoto

Akiyoshi Kanazawa

Hideo Suganuma

An electric power control system capable and a control device and a controlled device of electric power simplifying and reducing the cost of a slave device and electric power are provided. A power control system includes a master device supplied with power from a battery and a slave device powered by the battery through the master device. The slave device can also be supplied from a sub-battery or a solar cell that is different from the battery, the master device is provided with a control unit for controlling the slave device to be powered from the battery and the solar cell based on the power supply state of the battery and the solar cell.

Power control system, power control device and controlled device

A rewriting process of data stored in a control device is performed while executing a normal process. In a control system including a plurality of control devices in which data have been stored, each of which is a device for controlling an electric component of an automobile, a first communication line interconnecting the plurality of control devices, and a second communication line interconnecting the plurality of control devices for hacking up the first communication line, a rewriting device in which rewriting data have been stored is connected to the second communication line, and the rewriting device rewrites data stored in the control device to be rewritten with the rewriting data based on the rewriting data using the second communication line.

Data rewriting method and data rewriting system

A power supply system includes: a battery; a master device supplied with power from the battery; and a slave device supplied with power from the master device via a first power supply line. The slave device supplies power to a load via a second power supply line. The master device estimates a temperature of the second power supply line. When the estimated temperature of the second power supply line is higher than a second cutoff threshold, power supply via the second power supply line is cut off.

Method of power supply line protection, master device, and power supply system

The in-vehicle network includes a plurality of slave devices and a master device that communicates with the plurality of slave devices. The plurality of slave devices generates slave unique information as random information upon setting ID, and transmits the generated slave unique information. When all the slave unique information received from the plurality of slave devices are different from each other, the master device sets the ID based on each slave unique information. When the slave unique information received from the plurality of slave devices matches, the master device transmits a regeneration command to regenerate the slave unique information. Upon receiving the regeneration command, the slave device regenerates the slave unique information.

Communication system

In an in-vehicle network, a master device and a plurality of slave devices communicate with each other. A plurality of semiconductor relays for supplying power to the corresponding slave devices is provided for each of the plurality of slave devices in the master device. IDs corresponding to the plurality of semiconductor relays are stored in a flash ROM of the master device. The master device transmits the corresponding ID each time the semiconductor relays are turned on by sequentially turning on the semiconductor relays. The plurality of slave devices set the ID received after power supply as its own ID.

Provided is a communication system capable of performing function addition and design change inexpensively. The communication system includes a plurality of slave devices and a master device communicating with the plurality of slave devices. The control blocks control the slave devices or the master device. The input blocks input the input signals to input ports of the control blocks, respectively. The output blocks include semiconductor relays that are turned on and off according to output signals output from the output ports of the control blocks, respectively. The power supply block supplies power to the control blocks. These blocks are configured on separate substrates. The communication block has a communication I/F circuit. The slave devices or the master device are configured by combining plural types of blocks.

A communication system capable of shortening a setting time of an ID and reducing an incorrect setting is provided. A writing device sequentially transmits an ID of a plurality of slave devices after transmitting of the ID of a master device. The master device includes a plurality of semiconductor relays provided for each of the plurality of master slave devices for supplying power to the corresponding slave devices. The master device receives the ID of the master device from the writing device, and sets it as its own ID. The master device, every time the ID of the plurality of slave devices is received from the writing device after setting the ID of its own, turns on the semiconductor relays in order. The plurality of slave devices sets the ID received after power supply as its own ID.

Provided are a rewriting system capable of shortening rewrite time, a rewriting system and a computer used for the rewriting system. The rewriting system includes an ECU and a rewriting device for at least transmitting to the ECU a rewrite data of memory contents stored in a flash ROMB (memory), the flash ROMB (memory) includes a rewrite target area Ain which the memory contents to be rewritten are stored and a non-rewrite target area Ain which the memory contents not to be rewritten are stored, and the rewriting device transmits the rewrite data of the memory contents to the ECU only for the memory contents of the rewrite target area in the flash ROMB (memory).

Rewriting system, rewriting device and computer

A plurality of semiconductor relays is provided between a power source and loads. The semiconductor relays have a function of a current detection for detecting a current passing through themselves. The loads are connected to output terminals respectively. A switching unit arbitrarily selects and switches a connecting destination of the semiconductor relays from among the plurality of output terminals. A microcomputer controls the switching unit on the basis of the detection results of a current flowing through the semiconductor relays, and adjusts the number of the semiconductor relays connected to the same load and connected to each other in parallel.

Load controller and load control method

A gateway causes an ECU to set an ID according to the number of loads connected to the ECU. The ECU transmits, to the gateway, a set ID which is according to the loads. If IDs transmitted from a plurality of ECUs are overlapped, the gateway causes the ECU to set an ID according to the number of parallel connections of the loads. The ECU transmits, to the gateway, a set ID which is according to the number of parallel connections. If IDs transmitted from a plurality of ECUs are overlapped, the gateway causes the ECU to set an ID according to a sum of drive currents of the loads.

Setting device and computer

A communication system capable of shortening a setting time of an ID and reducing an incorrect setting is provided. A master device, when receiving an ID assignment request from a writing device, turns on all a plurality of semiconductor relays, and after a predetermined time has elapsed, turns all off, sequentially turns on the semiconductor relays and each time turning on the semiconductor relays, sends the corresponding ID. The plurality of slave devices, when receiving the ID assignment request from the writing device after supplying power, stores the fact in the ID request area, waits for a reception of the ID from the master device without confirming reception of the ID assignment request, and sets the ID as its own ID if determining that the ID assignment request has already been received by the ID request area after power is supplied.

A protector for an electricity supply circuit includes: a power switch for switching between connection and disconnection of the electricity supply circuit; a controller configured to output a switching command signal to the power switch in accordance with an input signal; and a current detector for detecting current flowing to the electricity supply circuit. The controller includes: a lower limit threshold determination unit configured to determine whether or not an estimated temperature of a power line has dropped below a lower limit threshold; a timer for counting the time that passes after a load has been turned off, when the load is turned off by the power switch; and a mode switching unit configured to switch the controller to a sleep mode when a predetermined time is counted by the timer and the lower limit threshold determination unit determines that the estimated temperature has dropped below the lower limit threshold.

Protector for electricity supply circuit

An ID setting device includes: an output circuit configured to output, as serial data, an ID to be set in an ECU, which is an ID setting target; an input circuit to which an ID that is set is input as serial data from the ECU; and a control unit configured to check the ID output by the output circuit and the ID input to the input circuit against each other. The serial data has a duty cycle which is according to setting data on a per bit basis.

Information setting device and electronic appliance

When an anomaly is determined in the transition of ECUs to a power saving state, a power supply control system sequentially turns on current supply switches while keeping a bypass switch on. A monitoring controller determines an anomaly in the transition of the ECUs to a power saving state on the basis of whether the dark current in the ECUs calculated from the amount of change at that time in the current in the power supply line is greater than an ordinary dark current. Further, in the startup state of the ECUs, power from a power supply can be supplied to the ECUs via the power supply line and individual supply lines.

Power supply control system

When supplying electric power to a load from a power supply via a parallel circuit of two electrical wires having the same wiring resistance, a vehicular power supply control device uses a current measurement unit in intelligent power devices (IPDs) to measure a passing current flowing in a semiconductor switching device in each of the electrical wires. Then, in order to match the temperatures of the electrical wires as estimated by a present temperature estimation unit base on the measured current, a target duty ratio in a PWM control for reducing the passing current in the semiconductor switching device of the IPD on one electrical wire is calculated in a target duty ratio calculation unit, and the semiconductor switching device of the one IPD is turned on and off by a PWM/DC control and shutoff determination unit with the calculated target duty ratio.

Growing community of inventors

Susono, Japan

Yoshihide Nakamura