Jidosha Denki Kogyo Kabushiki Kaisha

Jidosha Denki Kogyo K.k.

Nissan Motor Company Limited

Jidosha Denki Kogyo Kabushiki

Toshio Iwaoka

Yuichi Yamaguchi

Akihiko Tsukahara

Tsutomu Danzaki

Eisaku Hori

Kiyoshi Konishi

Kouichi Suzuki

Satoru Sekiguchi

Isao Yamamoto

Jian Chen

Kyoji Kobayashi

Masaru Inoue

Noboru Kaneko

Yujiro Tsutsui

Ekiro Hidaka

Yuuichi Yamaguchi

An automatic car-speed controller is provided with a car-speed sensor, a command switch, a car-speed memory, an actuator, a control circuit for controlling the actuator, and a prohibition circuit for preventing a driving motor of the actuator to rotate in the accelerating direction at the time of cancelling car-speed control or occurrence of some abnormality in the control circuit or the like, or a discrimination circuit for detecting whether a first limit switch is normal or not without driving a throttle in the opening direction.

Automatic car-speed controller

An automatic vehicle speed control device for use in an automatic controlling of the running speed of a vehicle to a certain set speed is disclosed. The device comprises a vehicle speed sensor for outputting vehicle speed data proportional to an actual vehicle speed, a command switch for outputting cruise command signals, an actuator for driving a throttle valve, a vehicle speed memory for memorizing the vehicle speed sensor data in accordance wth operation of the command switch, a decision device for deciding whether or not the decelerating control amount transmitted to the actuator is less than a given amount and the decelerating control time is continuing longer than the given time thereof during vehicle speed controlling, a setting device for setting a response constant W of the actuator larger by an offset value X is case where the decelerating control amount transmitted to the actuator is less than a given amount and the decelerating control time is continuing longer than the given time thereof in the decision device, and a control device for controlling an actuator by calculating the output time Y of an actuator driving signal on the basis of the difference between the actual vehicle speed and the memorized vehicle speed and calculating an actuator driving time TV in accordance with following relation TV=Y+W with the response constant W of actuator set by the setting device.

Automatic vehicle speed control device

An automatic car-speed controller is provided with a car-speed sensor, a command switch, a car-speed memory, an actuator, a control mechanism, and a holding circuit for cutting off an electric current to the actuator according to a braking operation and maintaining the actuator in its nonworking state till the actuator returns to its working state in response to a cruise command signal from the command switch in addition to the control mechanism. According to this controller, it is possible to release the actuator rapidly from the automatic car-speed controlling state in response to the braking operation even if the trouble occurs in the control mechanism.

A car-speed control system is provided with a car-speed sensor, a command switch, an actuator having an electromagnetic clutch, an actuator-driving circuit, a clutch-driving circuit, a car-speed memory, a controller and a comparing circuit for comparing voltage level with reference voltage at the time of changing the electromagnetic clutch to its unexcited state and for changing the actuator-driving circuit to its non-driving state if the voltage level of the clutch-driving means is higher than the exciting voltage of the electromagnetic clutch.

Car-speed control system

An automatic car-speed controller is provided with a car-speed sensor, a command switch, a car-speed memory, an actuator, a driving motor, an abnormality detector for detecting an abnormality in an electromagnetic clutch of the actuator by detecting the time required for returning a throttle to the fully closed position from the position at which the electromagnetic clutch is released, and a control system for making the actuator inoperative when the abnormality detector detects an abnormality in the electromagnetic clutch.

Automatic car-speed controller with detection of abnormality of the

A motor driving device for rotating a motor in forward and reverse directions which includes a switching circuit arranged in an H-bridge connection with both terminals of the motor, a controlling circuit, and an interception device provided on the respective terminal sides of the motor. The switching circuit includes two sets of switching transistors. The interception device protects the switching circuit by preventing both transistor sets from entering the ON-state at the same time, and thereby prevent the switching means from breaking down.

Motor driving device

A motor driving device is provided with switches connected with both terminals of a motor in an H-bridge connection and malfunction detectors connected with both terminals of said motor. The malfunction detectors are comprised of an impression part and a detection part which can detect the breakdown of the respective switches caused by open breakage or short breakage according to an output signal from the detection part corresponding to an input signal from the impression part.

Motor driving and malfunction detecting device

A system and method for automatically controlling a vehicle speed to a desired cruising speed are disclosed in which an abrupt deceleration time for which the vehicle is abruptly decelerated to the vehicle speed at a time when an off operation of an acceleration switch in a cruise command switch group is carried out after an on operation of the acceleration switch to carry out a constant deceleration of the vehicle is calculated from the total duration of time for which the actuator is controlled so that the vehicle speed increases at a constant rate. Therefore, no need to adjust the abrupt deceleration time according to the individual vehicles in which the systems are mounted. In addition, since the actuator is rendered in the abrupt deceleration state within the appropriate duration of time, road conditions, or a speed range in which the vehicle cruises does not affect the performance of the system. Furthermore, since when the total duration of time is above a first predetermined value and the magnitude of the acceleration is below a second predetermined value, the actuator is not actuated so that an undershooting of the vehicle speed does not occur immediately when the acceleration switch of the system is turned off after the on operation of the switch.

System and method for automatically controlling vehicle speed to a

A driving device for a door lock-actuator includes a door locking switch, a control circuit, a drive device and a counter. This device is free from the malfunctions and the restrictions of detecting limits which are problems in conventional-mechanical one-way switches, and can detect the locking and unlocking action certainly. In this device, the control circuit detects the locking and unlocking direction, and the drive device can drive the door lock-actuator of all the doors adjacent a passenger's seat according to the output signal from the control circuit.

Driving device for door lock-actuator

A system and method for automatically controlling a cruising speed of a vehicle which can maintain a vehicle speed at a desired cruising speed is disclosed in which a plurality of initialization signal values are set after an accelerator switch installed in a command switch is initially operated and thereafter is released and again operated to command a desired acceleration of the vehicle irrespective of the type of vehicle using the system, i.e., according to the vehicle speed. Second and third initialization signal values have predetermined functional relationships to a first initialization signal value which is set when the accelerator switch is initially operated. These signal values are, e.g., time widths for which a vacuum supply valve of a throttle valve actuator is opened so that an engine throttle valve is opened to increase the vehicle speed.

System and method for automatically controlling cruising speed of a

A system and method for automatically controlling a vehicle speed to a desired cruising speed in which a transfer point at which control of the vehicle speed is transferred from that carried out by returning the vehicle speed to the cruising speed set through an operation of a set switch at a controllable acceleration in the vehicle speed to that carried out by controlling the vehicle speed so that the vehicle speed coincides with the set cruising speed is determined on the basis of a sum of an acceleration value multiplied by a constant and speed difference from the actual vehicle speed to set cruising speed. Consequently, an overshooting of the vehicle speed does not occur when the vehicle speed is returned toward and finally settles at the set cruising speed.

System and method for automatically controlling a vehicle speed to a

An automatic speed control device for a vehicle or a stationary generator for emergency use is disclosed. The device comprises a speed signal detector means for generating speed pulses of a frequency proportional to a speed, a constant time generator means connected to the detector, a speed pulse counter means for counting the speed pulses received within the constant time, an auxiliary pulse generator means for generating auxiliary pulses of a constant period from the leading edge of each speed pulse, an auxiliary pulse counter means for counting from the leading edge of each speed pulse auxiliary pulse of constant period sufficiently smaller than a period of the speed pulse at the highest speed, an actual speed computing means connected to both counters for computing an actual speed from the counted result of speed pulses at the end of the constant time and the counted result of auxiliary pulse, a setting speed memory means connected to the actual speed computing means, a speed comparator means for comparing the actual speed and the setting thereby to generate an output signal corresponding to the difference thereof, and an electromechanical transducer means connected to receive the output signal of actual speed computing means for driving an adjustable speed mechanism of a prime mover.

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Yokohama, Japan

Toshio Iwaoka