Abstract: In a four wheel drive vehicle having an anti-lock brake system in combination with a front differential gear, a rear differential gear and a center differential gear, a center differential lock mechanism between the front differential gear and the center differential gear is automatically disengaged when a throttle opening sensor detects a low degree of throttle opening independently of the vehicle speed. The device for automatically disengaging the center differential lock mechanism is operated under the control of an operating unit receiving input signals from a center differential gear operating switch, a vehicle speed sensor, a rear wheel speed sensor, a brake lamp sensor and a throttle opening sensor.
Abstract: A compact, air cycle air conditioning system including compressor, turbine, heat exchanger and high speed electric motor is thermostatically controlled to supply either hot or cold conditioned air to a load air space. In a second arrangement, compact, exhaust gas driven air cycle air conditioning system including a compressor, turbine, two heat exchangers and an exhaust turbine is controlled by means of an exhaust gas bypass arrangement and supplies either hot or cold conditioned air to a load air space. In a third arrangement compact, exhasut gas driven air cycle air conditioning system includes an expansion turbine, two compressors, two heat exchangers and an exhaust turbine which is preferably controlled by means of an exhaust gas bypass arrangement and supplies either hot or cold conditioning air to a load air space.
Abstract: A position display apparatus comprises a frame having a space for setting a map book; a memory for storing date on the map book; a position detector for detecting a position; a display provided on or in the vicinity of the frame; and a control means for selecting a page of the map book in accordance with map data stored in the memory and position information detected by the position detector, and for giving an instruction to the display to enable the display to display the data concerning the number of the selected page. The control gives an instruction to the display for displaying the number of the selected page. Alternatively, the control gives an instruction to the display for displaying coordinate data on the basis of the position detected by said position detector and the selected page.
Abstract: An electronically controlled automatic transmission system including an automatic transmission having a plurality of clutches and brakes activated by application of a fluid pressure to change the gear ratio by engagement and disengagement of the clutches and brakes, a fluid pressure switching device for controlling the application of the fluid pressure to the clutches and brakes, and an electronic controller for changing the engagement and disengagement of the clutches and brakes by driving the fluid pressure switching device in accordance with the running condition of the vehicle, the electronic controller also controlling the speed of engagement of a clutch or brake which is to be engaged. The electronic controller includes a torque sensor for detecting the torque of the output shaft of the automatic transmission, and an engagement speed correcting device for correcting the speed of engagement of a clutch or brake which is to be engaged on the basis of the detected torque.
Abstract: In a drive control apparatus for an electric actuator to be activated under control of a changeover switch, the drive control apparatus including a power transistor arranged to supply therethrough the power to the electric actuator from an electric power source in response to operation of the changeover switch, a presumptive temperature of the power transistor is previously memorized and renewed in consideration with an increment of temperature change caused by consumption of the power when the electric actuator has been activated. The presumptive temperature is further renewed in consideration with a decrement of temperature change caused by lapse of time after the electric actuator has been deactivated. The power supply to the electric actuator is permitted only when the presumptive temperature is lower than a predetermined value. When the presumptive temperature becomes higher than the predetermined value, the power supply to the electric actuator is prohibited.
Abstract: An ignition system is disclosed in which secondary windings of a first and a second ignition coil are connected in parallel to a spark electrode of an internal combustion engine. A d.c. high voltage is alternately fed to the primary windings of the first and the second ignition coil. When an integrated value of a current flow through the first (the second) ignition coil reaches a first reference value, this primary coil is disconnected from a feed bus, and instead the primary winding of the second (the first) ignition coil is connected to the bus. When a short-circuit occurs in one of the ignition coils, only the other ignition coil conducts repeatedly, and accordingly the switching of the energization takes place whenever the current flow through the first (the second) ignition coil reaches a second reference value.
Abstract: A video camera for an automobile is mounted on the arm which carries a rear view mirror. The camera is directed forwardly to take pictures through the front windshield of an automobile and a boot is connected between the camera and the windshield to isolate the camera lens from moisture and dust. An air duct may be connected between the boot and the air conditioner to provide a flow of air through the boot.
Abstract: A mobile telephone apparatus having a conventional key pad, memory for storing telephone numbers at locations identifiable by certain digits and a processor for controlling the auto dialing of telephone numbers in response to a key pad input of the respective digits. The apparatus further includes a capability of receiving telephone numbers transmitted from a remote operator and storing the numbers at memory location that may be auto dialed.
Abstract: A gear reduction mechanism is provided with a rotatable shaft supported by a pair of spaced apart bearings in a one piece retainer having coaxially aligned holes for receiving said bearings. A potentiometer is supported from the same retainer and is provided with an input axle adjustably connected to the shaft to provide an output signal indicative of the angular position of the shaft. The adjustment may take place through a vent hole in the housing of the mechanism which has a removable filter therein.
October 2, 1989
Date of Patent:
March 10, 1992
Aisin Seiki K.K.
Hideya Hori, Mamoru Nakamura, Hiroyuki Amano
Abstract: A rotational type variable resistor includes a base plate having an arcuate resistance element and an arcuate electrode formed on one surface thereof. A shaft adapted to be connected to the control member is rotatably mounted in the housing and carries a pair of brushes which are disposed in sliding engagement with the resistance member and the electrode. The resistance element is formed from a first resistance layer deposited on the base plate between a pair of copper foil electrodes. A silver paste is disposed between the copper foil electrodes and the opposite ends of the first resistance layer and a second resistance layer is formed which completely overlies the first resistance layer and the copper foil electrodes. The arcuate electrode includes a first layer of copper foil disposed on the surface of the substrate.
Abstract: In a vehicle having a torque converter and a lock-up clutch for effecting engagement and disengagement between input and output shafts of the torque converter, an engine brake controlling apparatus provides engine brake control independently of vehicle speed and includes a device for detecting the number of revolutions of the input shaft of the torque converter; a device for detecting the number of revolutions of the output shaft of the torque converter; and a control device for allowing the lock-up clutch to be engaged when the number of revolutions of the output shaft has exceeded the number of revolutions of the input shaft and for releasing the lock-up clutch when brake operation is detected.
Abstract: A throttle control apparatus for use with an automotive internal combustion engine. The apparatus assures that the drive wheels are stopped from spinning on a snowy road surface if the driver pushes down on the accelerator pedal. The apparatus comprises an accelerator operation mechanism including the accelerator pedal, a first throttle-driving means capable of opening and closing the throttle valve, a controller, a second driving means, and a fuel-cutting means. The first throttle-driving means is mounted independent of the accelerator operation mechanism and includes a driving plate, a clutch plate, and a movable yoke. The controller controls the first throttle-driving means to adjust the throttle opening. When the first throttle-driving means becomes inoperative, the throttle valve can be driven by the accelerator operation mechanism via the second throttle-driving means. The fuel-cutting means is operated when excessive spin of the drive wheels is detected.
Abstract: An anti-skid controlling apparatus which establishes the time allocation for the pressure decreasing time and decreased pressure holding time, as well as the time allocation for the pressure increasing time and increased pressure holding time, in accordance with the correlation between wheel acceleration and wheel lock level. The brake fluid pressure in the wheel cylinder is increased, held constant or decreased as needed. This makes it possible to establish optimal time allocation settings allowing for the pressure increasing and decreasing characteristics of the pressure controlling device. In turn, brake fluid pressure control is kept optimally provided independent of various factors that would affect the brake fluid pressure in the wheel cylinder. Thus the apparatus is suitable for use on board diverse kinds of vehicle with diverse characteristics.
Abstract: The attitude of an antenna which is used with an artificial satellite emitting a radio wave is controlled by a combination of the establishment of an antenna attitude in accordance with gyro data, a small range conical scan which is conducted when a reception level is less than a first reference and at or above a second reference and is relatively high for altering the antenna attitude to a direction which provides a higher reception level, and a broader range search scan which is conducted when the reception level is less than the second reference and is relatively low for altering the antenna attitude to a direction which provides a higher reception level.
Abstract: An electronically controlled automatic transmission including an automatic gear shift for changing the gear ratio according to the coupling/decoupling of the brake and clutch, a hydraulic switch for controlling a hydraulic pressure exerted on the brake and clutch, a timer for setting a time of coupling/decoupling of the clutch and brake during a shifting period, a detector for detecting vehicle information, a time correcting device for correcting the set time according to the detected vehicle information, and an electronic control device for driving the hydraulic switch and for changing the state of coupling/decoupling. The electronic control device having a temperature detector for detecting the temperature of the working fluid of the hydraulic switch, and a feedback stop device for stopping the correction by the time correcting device when the temperature detector detects that the temperature of the working fluid is below a predetermined temperature.
Abstract: The invention is directed to an arrangement for monitoring a road condition which determines the coefficient of friction of the road surface on the basis of a signal corresponding to an acceleration of a vehicle detected by an acceleration sensor. The signal is converted into one of at least two predetermined values by conversion means in response to a magnitude of the acceleration every cycle of a predetermined time period. The converted value is summed up by summing means by a predetermined number of consecutive cycles to provide a total value in the last cycle thereof which is stored in memory means. Then, in determination means, one of at least two standard values is selected in response to the condition of increase or decrease of the total value in the present cycle provided by the summing means as compared with the total value in the previous cycle stored in the memory means.
Abstract: The invention is directed to an arrangement for controlling a braking force applied to each of right and left road wheels individually depending upon a braking condition, with a hydraulic braking pressure supplied to each of wheel brake cylinders through actuators respectively. The actuators are controlled by the braking force control system wherein output signals of wheel speed detectors are fed into first and second detecting circuits respectively by which the braking conditions of the road wheels are detected. Then, the detected signals are fed into a first driving circuit which produces driving signals fed to the actuators on the basis of an output signal fed from either of the detectors for one road wheel having a tendency to be locked first.
Abstract: An anti-skid control system for an automotive vehicle is provided with an actuator which is disposed in a hydraulic circuit between a hydraulic pressure generator and a wheel brake cylinder. The actuator is operated by an electronic controller so as to control a hydraulic braking pressure supplied to the wheel brake cylinder in response to at least an output of a wheel speed sensor which detects a rotational speed of a road wheel. In the controller, a desired hydraulic pressure is set, and the actuator is operated to control the hydraulic braking pressure to the desired hydraulic pressure. Where the actuator comprises a proportional pressure control solenoid valve connected to the controller which is provided with a resistor for detecting a current fed to the solenoid valve, the desired hydraulic pressure is set in response to the current.
December 21, 1989
Date of Patent:
September 24, 1991
Aisin Seiki K.K.
Kazutaka Kuwana, Yasuo Noda, Daiju Nomura, Tsuyoshi Yoshida
Abstract: The anti-skid control system is provided with wheel velocity sensors only for the driving wheels and is capable of performing the anti-skid control through its accurate estimation of the vehicle speed and proper compensatory control even when sharp braking occurs immediately upon the release of the accelerator after the occurrence of acceleration slip. The anti-skid control system is capable of starting the anti-skid control with certainty even when the braking operation is not detected because of a failure in the operation of the brake switch. The system is provided with a fluid pressure generating device, a fluid pressure controlling device, a brake operation detecting device, an acceleration detecting device, a wheel velocity detecting device, a braking force controlling device, a first estimated vehicle speed setting device and a second estimated vehicle speed setting device.
Abstract: A controlling device for automatic speed change mechanism is disclosed in which acceleration efficiency and fuel economy are simultaneously achieved. The device of the present invention is constructed such that plural sets of predetermined speed change programs are provided for indicating the relationship among the increase of driving power, that is, the opening degree of the throttle valve, the speed of the automobile and the speed change step. Based on the selected program information, the controlling of the speed change is carried out, while automobile height detection devices are provided for emitting electric signals corresponding to the distance between the surface of the road and the body of the automobile. Based on the height of the automobile body detected by the automobile height detecting device, a switch-over to a proper speed change program is carried out.