Matsushita Electric Industrial Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Takumi Ajima

Hiroyuki Maeda

Tsuyoshi Okada

Kenji Yoshioka

Shugo Horikami

Yuki Kawamura

Eriko Odachi

Route guidance information capable of displaying a route can be generated in an easy-to-understand, user-friendly manner even on a small screen of a navigation system. To generate such information, route guidance information at plural guide points on the route between plural points is so constructed that each piece of route guidance information will fit in the area of one screen. Display positions of the route guidance information are brought into one-to-one correspondence with numeric keys in ascending numeric order, and into correspondence with one another through hyperlinks not accompanied by calling of another file. Each file is divided so that each piece will not exceed the file size or maximum value of the numeric keys.

Route guidance information generating device and method, and navigation system

A wireless communication circuit provides wireless communication with a network; and a supply power control circuit controls supplying a power to at least one of said wireless communication circuit and a unit in a vehicle in response to a command signal which is inputted from an operation circuit or through the wireless communication circuit. The power is periodically supplied to a unit in its vehicle or the wireless communication circuit. A control circuit receives data from the unit and stores the data. The data is outputted or transmitted in response a data request. The unit may be a position detection circuit including a GSP receiver. The power is cut off when the unit is not used. Information is transmitted to the vehicle terminal apparatus which stores and displays it in response to a data command or a start-up of the vehicle. A diagnostic function may be provided. The main battery may be checked and the result is transmitted. The position of the vehicle are periodically detected and compared to detect a trouble of the vehicle. The result may be transmitted. An emergency informing function or system may be provided. The information transmitting system reads data from a data base and transmits data to a vehicle terminal apparatus.

Vehicle terminal apparatus and an information transmitting system

The present invention provides a method for identifying a position of a vehicle on a multi-layer road, by which it is possible to judge whether the vehicle is running on an upper layer or a lower layer of the multilayer road without using additional new devices or parts on a navigation system. In order to identify a position of a vehicle on a road when the vehicle is running on a multi-layer road, prediction can be made to some extent by determining the visible range to see GPS satellite in the sky is wide or narrow. With the purpose of processing the problem quantitatively, a position measuring ratio is defined as follows: Position measuring ratio (%)&equals;(Traveled distance where GPS position measuring is effective)&times;100/(Traveled distance). By this position measuring ratio, it is possible to identify the position of the vehicle on the road.

Method for detecting road position of car in multiformation road

An emergency assistance system for summoning first-aid assistance of persons and vehicles within the vicinity of a person involved in an automobile accident, while also making an emergency call to rescue and police authorities. An accident alarm is provided for announcing the occurrence of an accident to vehicles and persons in the vicinity of an accident in order to seek their help and to prevent a secondary disaster. In addition, first-aid equipment is provided to give first-aid treatment, for example, to maintain body temperature and restoration consciousness to prolong life of an injured person. In a automobile accident, an emergency measure is taken by the emergency equipment provided in the accident vehicle, such as notification of the occurrence of the accident and the need for medical assistance.

Emergency assistance system for automobile accidents

In an air-fuel ratio control system for an internal combustion engine, a fuel injection amount to be injected from a fuel injector is set based on a monitored operating condition of the engine. The fuel injector injects a corresponding amount of fuel to the engine. An air-fuel ratio sensor monitors exhaust gas discharged from the engine and detects an air-fuel ratio. The system derives an injector sensitivity based on a current fuel injection amount and an output of the air-fuel ratio sensor and further derives, as an injector sensitivity deviation, a ratio between the derived injector sensitivity and an injector sensitivity estimated upon designing the system. The system further derives a sensitivity correction term based on the derived injector sensitivity deviation so as to correct the injector sensitivity. The system may also correct an air-fuel ratio sensor sensitivity in a similar manner.

Air-fuel ratio control system for internal combustion engine

Electronic information such as pieces of map information, pieces of index information, pieces of route searching information, pieces of local facility information, pieces of audio information, pieces of dynamic image information and pieces of static image information are recorded in a CD-ROM. A part of electronic information are compressed, and any pieces of information in the remaining part of electronic information is not compressed. When an operator input a current position, a pieces of particular electronic information corresponding to a peripheral area of the current position is read from the CD-ROM to a navigation apparatus, it is judged by a compression mode judging unit whether or not the particular electronic information is compressed. In cases where the particular electronic information is compressed, the particular electronic information is expanded in an expanding unit, and a map image of the peripheral area is prepared in an navigation control unit and is displayed on a display. Therefore, because a part of electronic information are compressed, a large volume of electronic information can be recorded in the CD-ROM, and a navigating operation can be performed at various functions and high performance in a navigation system.

Navigation system for leading to a destination and recording medium used

A scenery from a first position in which contours of natural formations such as mountains, seas, lakes, basins, wide green areas and the like, contours of artificial structures such as buildings, towers, famous temples, schools and the like, a starry sky including stars and constellations, names of administrative regions such as cities, towns and the like, names of the natural formations and the artificial structures, positions of sunrise, sunset, a propagation locus of a diffracted electric wave and an earth orbital locus of the sun, and populations are indicated is displayed on a displaying unit 21. The first position is input to an input unit, or a current position is detected by a global positioning system as the first position. The scenery is prepared in a scenery displaying apparatus according to scenery information stored in a scenery information storing unit. Also, a specific scenery position is automatically selected from among a plurality of candidates for the specific scenery position by quantitatively estimating visibility fields of a plurality of sceneries in a special scenery position designating unit.

Scenery displaying system for displaying a scenery from an arbitrary

An air-fuel ratio control system with a high accuracy for an internal combustion engine which is capable of particularly improving the transient response characteristic irrespective of the occurrence of an air-fuel ratio sensor delay and a fuel attachment. An in-cylinder air-fuel ratio is calculated on the basis of engine data obtained in advance so that an neural network (NN) receiving a fuel injection quantity involving the past value and air quantity estimating information such as an intake pressure and outputting a calculated in-cylinder air-fuel ratio undergoes learning. In the actual control, a difference between the in-cylinder air-fuel ratio estimated in the NN and the target air-fuel ratio is taken on the basis of information such as a fuel injection quantity varying with the time and the output of the NN is partially differentiated with respect to the fuel injection quantity, so that the difference therebetween is divided by the resultant partial differential coefficient to obtain a fuel correction amount whereby the in-cylinder air-fuel ratio coincides with the target air-fuel ratio. The fuel injection quantity is corrected with this correction amount to calculate a final fuel injection quantity. That is, the in-cylinder air-fuel ratio is controlled to approach the target air-fuel ratio so that the exhaust gas air-fuel ratio equals the target air-fuel ratio.

A speed conversion coefficient calculating section 104 calculates a ratio of a GPS Doppler velocity calculated by a GPS velocity calculating section 101 to a vehicle speed measured by a speed sensor 102, thereby obtaining a speed conversion coefficient. There are provided a plurality of filtering sections 105-108 for averaging momently produced speed conversion coefficients. A filter selecting section 109 selects an optimum filtering section among these filtering sections 105-108. If a ratio of the speed conversion coefficient resultant from the speed conversion coefficient calculating section 104 to a presently adopted speed conversion coefficient is not within a predetermined range, an abnormality detecting & initializing section 110 notifies abnormality and initializes calculation process of the speed conversion coefficient in response to detection of such an abnormality.

System for obtaining a velocity of a moving object from a speed sensor

An optical pickup apparatus has a pickup movable part of integrally driven type in which the number of signal wires connected to the pickup driver part is decreased, and auxiliary signal wires required hitherto need not be provided. The optical pickup apparatus includes a pickup driver part including a semiconductor laser emitting a laser beam for forming a spot of the laser beam on a recording surface of a recording medium, a control circuit controlling the operation of the pickup driver part, and a plurality of signal wires connected between the pickup driver part and the control circuit for the signal transmission and reception between them. The control circuit includes a signal selector for selecting one of a plurality of input signals and outputting the selected signal, and a counter for supplying signal selecting information to the signal selector in a time division mode, so that the plural input signals can be supplied by the plural signal wires in a time division multiplex mode.

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Zama, Japan

Takumi Ajima