Aisin Seiki Kabushiki Kaisha

Aisin Seiki Company, Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin-warner Kabushiki Kaisha

Aisin-waker Kabushiki Kaisha

Tsuneo Hida

Taneichi Kawai

Koji Nishida

Shigemitsu Hamajima

Nobuaki Miki

Mutsumi Kawamoto

Hiroyuki Amano

Tsuyoshi Yoshida

Nobuyoshi Nagura

Shinji Takemura

Minoru Izawa

Hakumi Ishii

Masaki Mori

Sumio Takizawa

Kenichi Ohnishi

Yutaka Matsuzaki

Hideo Kegasa

Nobuyosi Nagura

The positions of position-controlled members provided on a car, for example, the driver's seat, steering wheel and mirrors, are controlled by a host position control unit through a plurality of position control units which are controlled on the basis of control signals transmitted from the host position control unit. After receiving the signal transmitted from the host position control unit, each position control unit sends a 1-pulse answer signal to the host position control unit through a returning unit. When the returning unit sends no answer signal in response to a control signal transmitted from the host position control unit, an abnormality recognizing device recognizes the fact that there is an abnormality in the communication system. Accordingly, any abnormality occurring in the communication system is promptly detected and it is therefore possible to quickly cope with the abnormal situation.

Method and apparatus for controlling positions of members provided on a

An imaginary limit position is determined on the basis of a position where an overload condition is detected, and such imaginary limit position is stored. Subsequent to the storage, an extent of movement is limited to that defined by the limit position. An operational mode which re-establishes a stored position is provided. In response to the detection of an overload condition, a motor is reversed to move the attitude back through a small stroke, whereupon the motor is deenergized. When a manual switch is turned on, the motor is driven over an incremental time interval and is then deenergized temporarily. After a given time interval, the motor is again driven. Where a pluarlity of motors are driven simultaneously, the timing of initiating to drive each motor is displaced relative to each other by a small time increment during which a transient current occurs upon initiating the drive.

Apparatus for controlling attitude of vehicle mounted device

An apparatus for automatically opening and closing a closure panel associated with an opening formed in the roof of an automobile is disclosed. The apparatus drives the closure panel for tilt open and tilt closed operation and for slide open and slide closed operation. During the sliding movement of the panel, the apparatus detects a load on a panel drive mechanism in a zone where the loads are normally low, and deenergizes the panel drive mechanism in the event of occurrence of an overload. In a zone where the loads are normally high as the panel presses against a weather strip, no deenergization of the panel drive mechanism occurs during an interval allocated for overload detection. The apparatus energizes alarm means during the time the panel is driven in the closing direction in a selected mode in order to draw the attention of a vehicle driver. For assuring the safeguard of the panel, the panel is stopped temporarily during the slide closed operation at a point which leaves a given opening.

Apparatus for automatically opening and closing an opening covering

A system for controlling the hydraulic pressure of a hydraulic control circuit of an automatic, variable speed transmission during a shift operation is provided. The hydraulic control circuit includes a plurality of hydraulic pressure control valves, a plurality of flow path switching means and a plurality of solenoid valves for controlling the engagement and disengagement of clutches and brakes in the transmission. The energization of the solenoid valves disposed in the hydraulic control circuit is controlled by an electronic system, which comprises a large scale integrated semiconductor logic unit, a semiconductor read-only memory, a semiconductor read-write memory and as required, input/output ports. The semiconductor read-only memory stores, inter alia, hydraulic pressure control program data which become operative during a selected one of the shift modes, each of which comprises a combination of the current speed stage and the speed stage to be established, and which controls the hydraulic pressure of the hydraulic control circuit by a repeated deenergization and energization of the solenoid valve for a given time interval during the shift operation. A signal indicative of a shift lever position is applied to the electronic system from a shift lever detecting means. Also a signal indicative of the current vehicle speed is applied thereto from a vehicle speed signal generating means. Finally, a signal indicative of a throttle opening is applied to the system from a throttle opening detecting means. In response to these signals and based on the constants data and the program data which are stored in the read-only memory, the electronic system determines a speed stage to be established. The hydraulic pressure in the hydraulic control circuit is controlled, simultaneously with a switching of the speed stage, on the basis of the hydraulic pressure controlling program data, thus reducing any rapid fluctuation of the vehicle speed or impulses during a shift operation.

System for controlling the hydraulic pressure during a shift operation

An electronic system for controlling an automatic transmission having an hydraulic control circuit comprises a large scale integrated semiconductor logic unit, a semiconductor read-only memory, a semiconductor read-write memory and input and output ports as required. The read-only memory fixedly stores standard data indicating the upper and the lower limit value of vehicle speed which correspond to the individual throttle openings of the engine for each shift lever position of a vehicle on which the automatic transmission, the hydraulic control circuit and the electronic system are mounted; slope detecting reference data indicating the vehicle speeds on slopes which correspond to the throttle opening in each shift lever position; slope detecting program data which is utilized to detect a slope as a result of the comparison between the reference data on one hand and the current shift lever position, the current throttle opening and the current vehicle speed; additional program data which is utilized to modify at least part of the standard data in response to a slope detected to produce shift reference data which corresponds to the slope; shift determining program data which determines a speed range to be established in response to the comparison of the current speed range, the current throttle opening and the current vehicle speed against the shift reference data; and shift controlling program data responsive to the determined speed range to control the energization of the solenoid valves.

Electronic system for controlling an automatic transmission in response

A system for controlling the hydraulic pressure of a hydraulic control circuit associated with an automatic, variable speed transmission is provided. The hydraulic control circuit comprises a plurality of hydraulic pressure control valves, a plurality of flow path switching means and a plurality of solenoid valves, and operates to control the engagement and disengagement of the clutches and brakes disposed within the transmission. The energization of the solenoid valves of the hydraulic control circuit is controlled by an electronic system, which comprises a large scale integrated semiconductor logic unit, a semiconductor read-only memory, a semiconductor read-write memory and as required, input/output ports. A plurality of signals are applied to the electronic system, including a signal indicative of shift lever position supplied by shift lever detecting means, a signal indicative of the current vehicle speed supplied by vehicle speed signal generating means and a signal indicative of the throttle opening supplied by throttle opening detecting means. In response to these signals and in accordance with the program data and constants data, the electronic system determines a new gear ratio to be established. If the shift mode, defined by a combination of the current gear ratio and the new gear ratio to be established, has a likelihood to produce drive train noises, the shift controlling sub-program data is utilized to delay the timing at which the shift controlling solenoid valves are deenergized and energized, thus avoiding or reducing the occurrence of drive train noises during the shift operation.

Control of drive train noises during a shift operation of an automatic,

A speed control device for a sewing machine includes at least means for providing a speed reference voltage signal, means for producing a motor speed voltage signal responsive to an actual speed of the driving motor, and means for comparing the speed reference voltage signal with the motor speed voltage signal to provide a speed difference signal. The speed difference signal is utilized to determine triggering angle of a thyristor means for controlling the motor speed and to maintain the predetermined motor speed irrespective of any variation in the driving torque of the motor, the voltage of the power source and the frequency of the A.C. power source.

Speed control device for a sewing machine

A motor control system for one stitch sewing control of a sewing machine is disclosed. Motor speed is controlled by controlling the trigger phase of motor drive thyristors. Two needle position detectors are employed to detect the arrival of the sewing needle at predetermined halt positions. A pair of motor speed indication signal generator circuits, a pair of memory circuits and a start pulse generator circuit are employed. When the one stitch sewing mode is selected and the foot controller is forced down, the first memory circuit memorizes the start of one stitch sewing and energizes the first motor speed indication signal generator circuit so as to drive the motor of the sewing machine at a predetermined sewing speed. When the first needle position detector detects the arrival of the sewing needle at the lowered halt position, it deenergizes the first memory circuit and the first motor speed indication signal generator circuit, and energizes the second memory circuit for energizing the second motor speed indication signal generator circuit so as to drive the motor at a predetermined lower sewing speed. When the second needle position detector detects the arrival of the sewing needle at the raised halt position, it deenergizes the second memory circuit and the second motor speed indication signal generator circuit. Deenergization of the second memory circuit causes a brake command signal which activates a brake means.

Motor control system for one stitch sewing control of a sewing machine

A motor control system for sewing a machine is disclosed in which motor drive thyristors, a trigger phase control circuit for the thyristors to control motor speed, and a dynamic brake control circuit means are employed. The dynamic brake control circuit means includes a shunt thyristor connected in parallel with the armature winding of the motor, and a brake command circuit which triggers the shunt thyristor so as to stop the motor by dynamic braking force. The brake command circuit is energized and triggers the shunt thyristor when a stop command signal and a deceleration detection signal are supplied. Thus dynamic braking of the motor of a sewing machine can be accomplished at a predetermined lower speed. To use the motor as a dynamo for dynamic braking stop control of the motor, a trigger phase clamp circuit is employed. To stop the motor at predetermined halt positions, a timer circuit, a predetermined constant trigger phase command signal generator circuit, and needle position detectors are employed. The timer circuit is energized by the stop command signal and generates a signal in a predetermined time interval, by which the generator circuit is energized and controls the trigger phase of motor drive thyristors to decelerate the motor. The brake command circuit triggers the shunt thyristor when motor speed is within a predetermined threshold level and the needle position detectors detect the lowered halt position or the raised halt position of the sewing needle or thread take-up lever.

Motor control system for sewing machine

A motor control system for a sewing machine is disclosed in which motor drive thyristors, a trigger phase control circuit for the thyristors, a comparator circuit for generating a trigger phase indication signal to accelerate or decelerate the motor to an indicated speed which corresponds to force downward on a foot controller, needle position detector means, a brake command circuit, and a predetermined constant trigger phase command circuit are employed. The predetermined constant trigger phase command circuit, which is energized by a stop signal from the foot controller, supplies a predetermined trigger phase indication signal to the trigger phase control circuit to lower the motor speed. The brake command circuit generates, at the time when the needle position detector means detects the sewing needle at a predetermined halt position, a brake command signal. The brake command signal is supplied to a brake means, e.g., dynamic brake means, mechanical brake means, etc., to stop the sewing needle or thread take-up lever at a predetermined 'halt' or stop position. A timer circuit is preferably connected between the foot controller and the predetermined constant trigger phase command circuit to deenergize the predetermined constant trigger phase command circuit and stop the motor after a predetermined time interval. This timing operation of the timer circuit prevents overheating of the motor when the sewing needle stops accidentally before reaching the predetermined halt position.

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Toyokawa, Japan

Tsuneo Hida