Nippondenso Co., Ltd.

Hajime Matsuhashi

Hidetoshi Kato

Nobuo Mayumi

Toshinori Maruyama

Keiichiro Banzai

Hideyuki Hayakawa

Katsutaro Iwaki

Tomonori Fukui

Shigeru Tanaka

Motozo Ikeda

Yasuhiro Kaneko

Motokazu Yamada

Tomihiko Nagata

Shin Kusase

Yoshio Akita

Takeshi Sada

Koshi Torii

A running guide system for an automotive vehicle planned for running in a sightseeing area or the like. Special running data including right or left turn, passage through a tunnel, running in a predetermined direction and passage on a slope are stored in a cassette tape together with distance data representing the distance from a start point in the form of a plurality of check point data. By collation of the running distance data actually measured and the special running condition data with the stored data, the automobile is guided audibly or visually. Geographical data or sightseeing data are also recorded in the cassette tape and reproduced in voice from time to time. When the automobile is displaced from the planned running route, an alarm is issued. When the automobile is restored to the planned running route, the planned running guide is restored.

Vehicle running guide system

A voltage regulating system for an automotive vehicle having a switching transistor connected to a field winding of an alternating current generator and a regulator for comparing a battery voltage with a reference value and for driving the transistor into a conductive state when the battery voltage is lower than the reference value. A current limiting circuit is provided for limiting the field current when the switching transistor is going to be driven into the conductive state over a predetermined interval, so that a maximum charging current can be obtained and an unfavorable heating of the switching transistor can be avoided.

Voltage regulator for alternating current generator

A battery voltage regulating system for an automotive vehicle, wherein a first and a second comparators for sensing a battery voltage and a delay circuit connected to the comparators and controlling a power transistor connected in series with a field coil of an alternator with a certain delay time. The delay circuit includes a capacitor and a charge-discharge current changing circuit so that when the battery voltage exceeds a reference voltage of the second comparator, which is higher than that of the first comparator, a charge on the capacitor is discharged with a larger discharging current than the normal discharging current, to thereby shorten the delay time.

Battery voltage regulating system

A battery voltage regulating system for an automotive vehicle, wherein a field current flowing through a field coil of an alternator is periodically cut off irrespectively of whether a battery voltage is higher or lower than a reference voltage, and a conduction ratio of the field current is controlled in accordance with a difference between the battery voltage and the reference voltage. The reference voltage is changed in response to an increase or decrease of the conduction ratio, so that a battery voltage is prevented from decreasing when the conduction ratio is increased.

Battery voltage regulation system

In a speed display device of the numerical display type which comprises a speed sensor for producing an electric speed signal indicative of a travel speed of the vehicle, and an electric display responsive to the speed signal for providing a numerical display indicative of the travel speed of the vehicle, the improvement comprises an electric control device responsive to the speed signal for successively enlarging the size of the numerical display in accordance with rise of the speed level. Alternatively, the electric control device may be arranged to be responsive to the speed signal for successively inclining the shape of the numerical display in accordance with rise of the speed level.

Speed display device for automotive vehicle

A voltage regulator for controlling electric power generated by an alternator coupled to a vehicle engine is disclosed. The regulator comprises a switching circuit for regulating an output voltage from the alternator or a voltage for charging the battery of the vehicle to a predetermined value by controlling a current flowing through the rotor coil of the alternator, a comparator for detecting ON-state of the switching circuit, a smoothing circuit for detecting the average ON duty of the switching circuit by smoothing the output of the comparator, and a reference-voltage generating circuit for generating and issuing a reference voltage in response to the average ON duty to the switching circuit. The voltage regulator detects the load condition of the alternator from the average ON duty of the switching circuit and regulates the output voltage of the alternator or the voltage for charging the battery of the vehicle in accordance with the load condition to charge the battery in proper condition.

Voltage regulator for alternator of vehicle

A battery charging control system for automobile, wherein a voltage regulator for regulating the output voltage of an AC generator for charging the automobile battery is controlled by detecting changes of the output voltage. When the output voltage of the generator changing with ripples is reduced with an increase of load current, the minimum value of the output voltage is detected, while when the output voltage increases with an increase of the generator rotational speed, an average value of the output voltage is detected. In accordance with these values, the voltage regulator is controlled to compensate for the changes of the output voltage of the generator.

Battery charging control system for automobile

A generation control apparatus for a vehicle generator includes an energization circuit consisting of an energization path forming resistance element and switching means and provided between the output terminal of a rectifier circuit of the generator and the ground, and an oscillator circuit responsive to the voltage at the output terminal of the rectifier circuit to always oscillate and control the energization circuit, whereby an energization path is intermittently provided in response to the output signal of the oscillator circuit. If a generation fault condition is detected, current is caused to flow from a battery through a key switch, indicator means and the energization path forming resistor intermittently and the driver of the vehicle is alerted to the generation fault of the generator or a break in an excitation circuit by a flashing of the indicator means.

Generation control apparatus for vehicle generators

A generation control apparatus for a vehicle generator detects the output voltage of an excitation current supplying rectifier circuit of the generator. When the output voltage is lower than a predetermined value, a switching element is turned on and a current for operating an indicator lamp is caused to flow through a resistor connected to the switching element, thus detecting a break in the generator circuit.

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Kariya, Japan

Hajime Matsuhashi