Yazaki Corporation

Nobuhiro Imaizumi

Tatsuaki Oniishi

Kiyoshi Hosokawa

Masataka Suzuki

Yoshinori Ikuta

Masashi Watanabe

Akiyoshi Kanazawa

Hiroyuki Ashiya

Hiromichi Hanaoka

Osamu Souda

Kazunori Ryu

Yoshio Iwasawa

In designing the connection correspondence of the control switches to the loads, the control-specification design management system used for the load control devices refers to the connection correspondence stored in the look-up table or a slip file prepared in the preceding design, and presents to a designer candidates for the loads that can be controlled when these are connected to the control switches. While seeing the candidates, the designer selects the most suitable one from among those presented candidates. He designs control-specification information and prints out the contents of the slip file.

Control-specification design management system used for load control devices

In a multiplex communication system for a bus vehicle, including: a plurality of loads disposed in the bus vehicle and connected to a wire harness; a switch unit for inputting signals to operate the loads and generating multiplex data; a first load drive unit for controlling the loads placed mainly on a floor of the bus vehicle; and a second load drive unit for controlling the loads placed mainly on a ceiling of the bus vehicle, the multiplex communication system further includes a multiplex line interconnecting the switch unit, the first load drive unit and the second load drive unit, and transmitting the multiplex data to the first and second load drive units to execute a multiplex communication, each the first and second load drive units controlling the loads in accordance with the multiplex data received through the multiplex line from the switch unit. The wire harness can be formed with high assembling performance or productivity in the bus vehicle.

Multiplex communication system for vehicle

A multiplex transmission system is made up of a master load control unit which is connected to a multiplex transmission network and is capable of executing a multiplexing operation based on control specification information as a master system, slave load control units capable of the multiplexing operation as a slave system, and a nonvolatile removable external storage unit capable of reading the control specification information as required. Abnormalities associated with the multiplexing operation which arise in the multiplex transmission system are detected, and load control units in an abnormal condition can be restored to a normal condition by resetting.

Multiplex transmission system

A multiplex transmission system includes a multiplex transmission network through which normality and abnormality processing control specification information (PCSI) for loads are transmitted. A master load control unit (LCU) is connected to the multiplex transmission network. The master load control unit can multiplex the abnormality PCSi for a load as a main operation. A slave load control unit (LCU) is connected to the multiplex transmission network. The slave load control unit can multiplex the abnormality PCSI as a slave operation between itself and the main LCU. A storage device is mounted in the master and slave LCUs. The storage device can update and hold the information and read it at any time. In this multiplex transmission system, multiplexing abnormality can be detected and abnormality processing in the LCU in an abnormal state is controlled to urge its recovery of the LCU to a normal state.

Multiplex transmission system and abnormality processing controlling

An overcurrent breaking circuit includes a semiconductor switch inserted in a main current path; a current detector circuit for detecting a current passing through the main current path; a logic circuit for switching off the semiconductor switch when the current detector circuit detects a current exceeding a set value for an overcurrent level; a first unit for prohibiting the logic circuit from performing an operation for switching off the semiconductor switch even if the current detector circuit detects a current exceeding the set value for a first short time period immediately after the semiconductor switch is switched from a breaking state to a conductive state; and a second unit for prohibiting the logic circuit from performing an operation for switching off the semiconductor switch for a second short time period even if the current detector circuit detects a current exceeding the set value when the semiconductor switch remains in a conductive state.

Overcurrent breaking circuit

A power supply unit adapted to supply power from a power supply section to a load via a plurality of power supply lines connected by an on/off switch and connectors. The power supply unit includes a load open detection section for detecting an open state between the on/off switch and the load, a monitor section for monitoring the number of times the open state has been entered per unit time based on the detection result of the load open detection section, and a control section for controlling the on/off switch off when the number of times the open state has been entered per unit time is greater than a predetermined number of times.

Power supply unit and connector connection failure detection method

A control signal generated as a result of the actuation of each of control switches of a control section is multiplexed by a multiplexing section, and the thus multiplexed signal is sent to a multiplex transmission line. Load control sections receive the multiplexed control signal sent over the multiplex transmission line. The load control sections then control the electric power fed to a corresponding one of loads on the basis of the received control signal. Control data, representing the form of output control of the corresponding load which is controlled as a result of the actuation of the control switch, are stored according to the control switches. Control means control the electric power fed to the load on the basis of the control signal using the control data.

Vehicle load control system

A switch operating unit 10 has operating switches for operating loads. A load control unit controls the corresponding loads in accordance with the operation of the operating switches according to information, which is stored in first storage device, as to the correlation between the operating switches and the loads. A total rated capacity computation device computes the total rated capacity of the loads to be driven under the control of the load control unit according to information, which is stored in second storage device, as to the rated capacity of each load. When the total rated capacity exceeds a predetermined allowable capacity, the load control unit operates to restrict the driving of the low-priority loads in the order of analog-controlled loads and on-off controlled loads according to the information stored in the second storage device.

Load control system for vehicle

An input interface using a multiplex type input circuit for selecting a desired one, as its output, of a plurality of input power signals in accordance with a control signal generated by a CPU and for supplying the selected input power signal to an electronic element unit.

Input interface using multiplex type input circuit

Disclosed is a corrosion preventing circuit for a switch which, even if a large current switch is used for a small current system such as an electronic unit, can improve long-term durability of the switch in a manner similar to the present level without increasing the burden on the system side, thereby ensuring the reliability of devices belonging to the system. A series circuit consisting of a switching means and a current limiting resistor is connected in parallel to a resistor that is connected in series between a dc power supply and a large current switch. A control circuit turns on the switching means by generating a pulse of a predetermined time width after a predetermined time in accordance with the turning on of the large current switch. The current flowing while the switching means is being turned on is applied to the large current switch, so that an oxide film formed at the contact of the switch is destroyed.

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Shizuoka, Japan

Nobuhiro Imaizumi