Hitachi, Ltd.

Nissan Motor Company Limited

Nitachi Automotive Engineering Co. Ltd.

Akira Hasegawa

Fumio Hamano

Shigeru Oho

Takeshi Hirayama

Takanori Shibata

Masahiro Matsumoto

Kenichi Ushiku

Takahiko Tanigami

Akira Endo

Kazuhiko Sato

Michimasa Horiuchi

Kinpei Okano

Shigeru Horikoshi

Harutoshi Tsujimura

Kenzo Hirashima

Shunzo Tomioka

Shun-ichiro Sugimoto

Masanori Matsuo

Akira Kitamura

In a data transmission system having a data processing unit (MPU) and a communication control unit (CIM) and capable of transmitting a data to a local control unit (LCU) in a half duplex mode, the data processing unit receives the data by an interruption based on an end of data reception signal supplied from the communication control unit.

Data transmission system having a communication control computer for

A collective wiring system for an automobile provides a central control unit which communicates with a plurality of terminal control units each connected to one or more input or output devices, such as switches, sensors, motors and the like. The control over output devices in response to the status of input devices is performed by the central control unit on the basis of tables of data stored in memory. A scan table controls the order in which data communications are made to the terminal control units to obtain their status and provide them with control commands. A monitor table stores the current status of the terminal control units and a control table stores the control data for the terminal control units. A connection table stores the relationship between the terminal control unit for an input device and the terminal control unit for the output device to be controlled thereby. Thus, connection control between input and output devices is effected by software.

Collective wiring system and method of control thereof

Data transmission system

In a data transmission system having a central control unit including a data processing unit (MPU) and a communication control unit (CIM) which is capable of transmitting data to a local control unit (LCU) in a half duplex mode, the data processing unit receives the data in an interruption based on an end of data reception signal supplied from the communication control unit. At the time of initialization of the system, the central control unit responds to the application of power to the system by transmitting predetermined control data to the local control unit to set the state of accessory devices connected thereto, thereby preventing improper operation of the accessory devices during system startup.

A transmission includes a control unit which controls engagement/disengagement of an electromagnetic clutch such that it is disengaged when it is detected that a vehicle is at a stop, and such that the vehicle creeps at a predetermined speed when pressing of an accelerator pedal is detected.

Control system for electromagnetic clutch for vehicle

Control method for a collective wiring system

A terminal device for a multiplexed data transmission system has a decoder matrix having plural groups of function setting inputs for selecting plural types of functions such as interface, operation modes and other. One group of the function setting inputs are preferably address designating signals which are utilized for determining the interface. The other group of the function setting inputs determines various additional functions such as, for example, enabling/disabling of fail-safe function and automatic transmission function. Selection with the aid of the matrix allows selection of a large number of functions with a small number of input signals. Utilization of the address signals to this end allows the number of terminal pins to be decreased to a minimum.

Terminal for data transmission system

A multiplex communication system comprises a central control unit, a plurality of local control units, an optical loop transmission path interconnecting the central control unit and the plurality of local control units by optical fibers in a loop-like configuration to thereby cause data transmission to be effected among the control units through the optical fibers, and an electrical loop transmission path for interconnecting the central control unit and the plurality of local control units by electrical signal conductors in a loop-like configuration to thereby cause data transmission to be effected among the control units through the electrical signal conductors, wherein the central control unit selects at least one of the optical loop transmission path and the electrical loop transmission path to be connected to the signal transmitter means in dependence on predetermined conditions, so that data transmission is conducted between the central control unit and the local control units through the selected loop transmission path.

Multiplex communication system

A system for supplying power to automotive parts having a rotary component in which a pair of circular coils are disposed in opposition to each other around a rotary shaft of a rotor. One coil is fixed on rotor side, and the other coil is fixed on stator side, thereby forming a DC/DC converter. The rate of magnetic coupling between the coils is constant against the rotation of the coil on rotor side so that stable power is supplied efficiently to devices on rotor side in contactless fashion.

Power supply system for automotive parts having a rotary component

A bearing system for a vertical type rotary machine including a vertically extending rotor shaft including a guide bearing immersed in oil in an oil tank disposed around the rotor shaft. The guide bearing has a cylindrical bearing surface juxtaposed against the peripheral surface of the rotor shaft and a plurality of axially extending oil grooves formed in the cylindrical bearing surface. An oil guide member is mounted on a lower end surface of the guide bearing adjacent to the open lower axial end of each oil groove. Each oil guide member has a guide surface facing a flow of oil in the oil tank induced by the rotation of the rotor shaft for guiding the oil flow into the associated oil groove. The guide surface has a lower edge thereof remote from the lower end surface of the guide bearing, which is advanced toward the direction of oil flow with respect to an upper edge of the guide surface adjacent to the lower end surface of the guide bearing. The guide surface extends radially outwardly beyond the bottom surface of the associated oil groove.

Bearing system for vertical type rotary machine

An impact detecting device of the type including a casing; a movable member which is housed in the casing and movable substantially along a straight line relative to the casing, when the device is subjected to an impact; a spring for elastically loading the movable member during its movement in the direction against the direction of the movement of the movable member; and a switch adapted to be closed, when the movable member is moved a given distance against the action of the spring. In this device, there is provided a spiral guide which engages the movable member during its movement so as to rotate the movable member, whereby part of energy to be imparted to the casing and movable member due to impact upon collision is consumed for the rotation of the movable member, so that an extent of movement of the movable member may be shortened.

Impact detecting switch

In an apparatus for protecting passengers of a motor vehicle from being injured in the event a collision of the vehicle by utilizing an air cushion bag which is inflated by an electric actuator device operative in response to the collision, an apparatus for recording erroneous inflation of the protection air bag comprises a circuit for detecting the application of electric energy to the actuator device and for determining if such application of electric energy is made through a collision sensing switch which serves to connect the actuator device to an electric energy source upon an actual collision. When the application of the electric energy to the actuator device without the aid of the collision sensing switch is detected upon the inflation of the air bag, such inflation is regarded as the one due to erroneous operation for some reason other than an actual collision and a signal indicative of such inflation is recorded.

Apparatus for recording erroneous operations of passenger protecting

An oil pressure detecting apparatus for an internal combustion engine comprises an LC oscillator having an inductance variable in dependence upon variation in the oil pressure of the engine. The frequency or voltage of an output signal of the oscillator is compared with that of a reference signal having a predetermined relation to the number of revolutions of the engine, thereby to determine if the oil pressure is within an acceptable range.

Oil pressure detecting apparatus for internal combustion engines

An acceleration detector using a combination of a bar magnet, an inertial substance or body and a fixed contact, in which the inertial substance is secured to the free end of a plate-spring supported in a cantilever fashion and having a pair of opposing curved portions.

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Katsuta, Japan

Akira Hasegawa