Showing papers on "Electronic control unit published in 1985"

Device for marking edges of shelves

Abstract: A device for indicating prices, article numbers or similar information on the edges of the shelves in department stores or storing premises. The device comprises a number of displays which shall be mounted to the shelves, and each display is connected to a separate electronic control unit and forms together with said unit an operative unit having its own power source. This operative unit is directly or indirectly connected to external control apparatus.

Control of a vehicle automatic transmission

Abstract: A vehicle automatic transmission including a hydraulic torque converter and a multiple stage transmission gear mechanism connected with the torque converter, and an electronic control unit for automatically shifting the gear stages of the gear mechanism in accordance with the vehicle operating condition. The electronic control unit has a plurality of gear shift patterns for a plurality of operating modes, such as a normal mode, a power mode and an economy mode. A manual switch is provided for selecting one of the operating modes. The control unit controls the gear mechanism so that different gear ratios are obtained between corresponding gear stages in different operating modes.

Metering system for an internal combustion engine for influencing the operating mixture

Abstract: A metering system for an internal combustion engine with an electronic control unit (22) for influencing at least one of the constituents of the operating mixture and with a first exhaust measuring probe (20) arranged in the exhaust duct (18) of the internal combustion engine (10), the output signal from which probe together with other operating variables of the internal combustion engine (10) such as load, speed or temperature etc. is fed to the control unit (22) and is further processed inside the control unit (22) by way of a control function, with an exhaust catalytic converter (19), arranged downstream after the first exhaust gas probe (20) in the exhaust duct (18) and a second measuring sensor arranged in the exhaust duct (18) is described, in which the second measuring sensor is arranged downstream in the exhaust duct (18) after the exhaust catalytic converter (19) and is designed as second exhaust gas measuring probe (21). The output signal of the second exhaust gas measuring probe (21) is fed to the control unit (22) and inside the control unit (22) is further processed by way of a control function with a time constant different from the time constant of the first control function. It is thereby possible to reduce the pollutant emissions of the internal combustion engine whilst maintaining good handling and optimum consumption. This results in a high control frequency and low control amplitude of the control function, so that the degree of conversion of the catalytic converter is significantly improved.

Electronic method and storage system for storing setting values for setting devices in printing machines

Abstract: A storage system for the storage of setting values for adjusting devices on printing machines including a portable memory unit for the exchange of data with a device for communication, preferably disposed on the printing machine. A housing of the memory unit contains electrically operated, solid-state storage elements that are coupled to an electronic control unit for making logic decisions. The memory unit contains at least one data input in the form of at least one contactlessly working sensor and a data output in the form of at least one contactlessly scannable output element, both optically coupled to corresponding optical elements of the device for communication through viewing windows during data exchange. For the display and input of storage information and values, a display and a manual input device are located on the memory housing. The memory unit is supplied with power without metallic coupling by an external power supply which supplies a power supply internal to the memory unit with the operating energy required by means of inductive capacitive or sound generated externally to the memory unit. This assures a largely interference-proof and substantially maintenance-free data exchange.

Back-up device for an electronic control system of an automatic transmission

Abstract: A back-up device for an electronic control system of an automatic transmission in an automotive vehicle, of the type including at least first and second frictionally engaging elements hydraulically actuable, respectively, for establishing a first speed ratio for lower speed running of the vehicle and a second speed ratio for higher speed running of same, selector valves adapted to selectively assume first and second positions, respectively, for connecting the first and second frictionally engaging elements to an operating fluid source, electromagnetic valves for driving the selector valves to select the first position or the second position, and an electronic control unit for selectively energizing and deenergizing the electromagnetic valves in accordance with a predetermined gear shifting manner responsive to electrical signals indicative of the vehicle speed and the engine output. The back-up device comprises a vehicle speed sensing device for generating an output signal having a value thereof increasing as the vehicle speed increases, and a control mechanism for causing the selector valves to assume the second position, irrespective of the operation of the electromagnetic valves, when the value of the output signal from the vehicle speed sensing device exceeds a predetermined value, thereby prohibiting establishment of the first speed ratio in the event of failure in the electronic control system during high running of the vehicle.

Control system and method for comprex supercharger

Abstract: A "comprex" supercharger, which has a rotor formed along its whole periphery with a plurality of axial cells wherein air introduced into the cells for supply to an internal combustion engine is compressed by engine exhaust gas introduced into the cells, is controlled by a control system such that a drive means for the rotor is controlled by an electronic control unit in response to output from engine operating condition sensors to control the rotational speed of the rotor so as to achieve optimum supercharging pressure to operating conditions of the engine.

Control systems for gas turbine engines

Abstract: The invention simplifies arrangements for controlling on/off control valves (21 to 24) in a gas turbine engine by means of an electronic control unit (27) coupled to a fluid servo power system (31) Essentially, a servo valve (33) controlled by the electronic control unit (27) temporarily connects the servo power system (31) to a source (41) of high pressure air, thereby passing a pulse of high pressure air to a motor driven multiplex valve (35), which again is actuated by signals from the electronic control unit (27) The multiplex valve (35) is utilised to distribute each pressure pulse as it arrives to any one of a number of control valves (21 to 24) as designated by the electronic control unit (27) The pressure pulses operate the control valves into their 'on' or 'off' positions as the case may be, the control valves being of the latching type (Figure 3, not shown) so that each stays in the position to which a pressure pulse has driven it until the next pressure pulse arrives

Apparatus for controlling the passage of a liquid

Abstract: An apparatus for controlling or regulating the through-flow or passage of at least one liquid, particularly for temperature regulation or control, contains at least one valve with an electrical valve drive, which is controlled by an electronic control unit. The control unit makes available the signals necessary for operating the valve drive. The power supply for the control unit and the valve drive is provided by a thermocouple, whose one side is exposed to the temperature of the liquid to be regulated and whose other side is exposed to a temperature differing therefrom. The apparatus preferably contains a storage battery.

Toyota's new single-chip microcomputer based engine and transmission control system

Abstract: Toyota succeeded in the fall of 1984 in manufacturing a complex engine and transmission control system using a newly developed single-chip microcomputer. This microcomputer, equipped with an 8K-byte ROM (Read Only Memory) and a 256-byte RAM (Random Access Memory), a powerful real time processing function, and a high-speed optimum instruction set, is better suited for automobiles. Application of the latest CMOS technology has enabled lower power consumption and improved noise immunity. The new system, which includes a new function, the electronic spark advance with knock control in addition to the conventional sophisticated system, has greatly improved the performance and driveability of vehicles. The newly designed electronic control unit (ECU) has been greatly improved in reliability and has not changed in its size with the adoption of the highly integrated new microcomputer, which is due to the fact that it uses fewer LSIs (Large Scale Integrated circuits) than the conventional ECU, although it includes the great additional function.

Speed governor for fuel injection pumps

Abstract: A speed governor for fuel injection pumps of internal combustion engines has an electric control motor driven via an electronic control unit for actuating a quantity control member of the injection pump. A travel limitating element of the quantity control member is provided in order to determine the maximum injection quantity. The travel limitating element is adjustable independently of the electronic control unit between a position for the starting quantity and a position for the full-load quantity in accordance with engine characteristics. While the operating rpm performance graph is controlled by the electrical portion of the speed governor, the maximum rpm is determined by hydraulic-mechanical means.

Control device for a hydrostatic drive mechanism

Abstract: The control device for a hydrostatic drive mechanism according to Fig1, which has an adjustable pump (10) driven by a diesel engine (15) and a hydraulic motor (13) is so designed that it can run with optimum fuel economy For this purpose, the position of the accelerator pedal (20), which serves for adjustment both of the diesel engine and of the hydrostatic drive, is fed by way of an electrical sensor (21) into an electronic control unit (23) The position (18) of the control rod of the injection pump (16) is also relayed to this by way of an electrical sensor (24) The electronic control unit (23) adjusts the pump (10) according to these values and its program The position of the accelerator pedal can be signalled either directly by mechanical means to the control unit (17) of the injection pump or indirectly by way of the sensor (21) and the electronic control unit to the injection timing mechanism (38) of the injection pump In addition it is possible, by means of an electrical sensor (32) actuated by the brake pedal (31), to feed a signal which actuates a wheel brake into the electronic control unit (23) It is also possible to detect further parameters important for a hydrostatic drive mechanism and to relay them to the electronic control unit, which according to its program favourably influences the running characteristic of the drive mechanism

Pressure medium-actuated brake system for vehicles

Abstract: A pressure medium-actuated brake system for motor vehicles has at least one electronic control unit (15) for the control of solenoid pressure control valves (14), by means of which a brake pressure can be introduced into wheel brake cylinders (13) of the vehicle. The electronic control unit (15) is connected by way of a drive switch (16) to a current supply (17) so that on opening of the drive switch (16) the control unit (15) is switched off. For constant operating readiness of the brake system even when the vehicle is parked, a control unit alarm device (22) with extremely low power input is provided, which activates the control unit (15) by bypassing the drive switch (16) when an event, for example operation of the brake pedal, occurs necessitating vehicle braking when the drive switch (16) is open (Fig. 1).

Cycle control for electric downriggers

Abstract: An electronic cycle control for electric downriggers providing the fisherman with a selection of amplitude for up and down motion at fishing depth for the ball or weight and offering a selection of dwell at each extreme of movement and functioning automatically and repetitively until terminated by the fisherman. The electronic control unit operates as a piggyback operator on the reversing relays of the electric motor of the downrigger.

Emergency controller for vehicle dependent on electronic control

Abstract: PURPOSE:To make a car travelable as far as its irreducible minimum even in time of trouble happening, by installing an emergency device, which controls a clutch in a state of main electronic control being turned to OFF, and also another emergency device which shifts gears to the specified gear position of a transmission CONSTITUTION:In time of trouble happening, a driver pushes an emergency switch 23 whereby an emergency relay is turned to OFF, intercepting power feed to an electronic control unit 13, and simultaneously voltage is impressed on a emergency control part 17 which therefore gets operating A car can be traveled by an emergency device 17a controlling a clutch 2 in the state that the main electronic control unit 3 is being turned to OFF, and another emergency device 17b shifting gears to the specified gear position of a transmission 6

A New Fault-Interrupting Device for Improved Medium-Voltage System and Equipment Protection

Abstract: A newly developed fault-interrupting device employs radical departures in overcurrent sensing, response, and interruption techniques. It offers a large selection of time-current characteristic curves plus high continuous current ratings combined with efficient current-limiting action in a compact, self-contained package not requiring external sensing or control power. Improved protection and coordination can be provided in a wide variety of medium-voltage circuit and equipment applications, some of which cannot be properly addressed with previously available devices. Sensing and response functions of the electronic control module and operation of the interrupting module are described. Examples are presented illustrating use of the flexible response characteristics in the solution of difficult protection and coordination applications.

Electronic control unit

Abstract: Control unit for controlling at least one peripheral device, in particular a slide projector, of a lighting system, synchronously with single-channel or multi-channel sound signals stored on sound carriers, in particular music and/or voice, which is characterised by a control mark generator which can be set off by an operator for generating discrete control marks from the electric sound signals of any sound carriers and by a downstream control mark processor for driving the devices.

Electronic guard patrol systems

Abstract: An electronic guard patrol system and a portable clock unit for use in the electronic guard patrol system, the electronic clock unit including a single connector which co-operates both with the connection terminals of each key station and also on the central control apparatus. The electronic control unit is able to identify the presence of a key station or the central control apparatus for respective interrogation of each key station and for switching the state of the clock unit to receive or output data to the control apparatus on command.

Start-shift selecting control system for automatic clutch

Abstract: PURPOSE:To make clutch connection properly performable in accord with a running state of a car, by performing the selecting control between a start control mode for clutch connection cotrol and a shift control mode in a way of comparing an idle running car speed with an actual car speed. CONSTITUTION:An electronic control unit 9 compares the existing car speed V obtained from a sensor 8b with an idle running car speed Vi. In time of V Vi is the case, it also controls the connection of the clutch 2 by means of the pedalling travel of an accelerator pedal 11 obtained from the gear position obtained from a shift control mode, or a sensor 6c and a sensor 11a.

System for controlling fuel-flow rate at the time of full- load operation

Abstract: PURPOSE:To prevent drop of the output torque of an engine, by detecting change of an injection timing signal given from an electronic timer, and driving an actuator of a governor for controlling the fuel-flow rate in case that delay of the fuel injection timing is caused from the full-load torque condition at the time of steady operation of the engine. CONSTITUTION:A control system of this invention comprises an actuator 2 of a governor for controlling the fuel-flow rate and an electronic timer 1 for controlling the fuel injection timing. An engine-speed signal S1 given from an engine-speed sensor 4, an injection timing signal S3 given from a timing sensor 1a, etc. are furnished to an electronic control unit 6. In case that the injection timing signal S3 is delayed, an engine is controlled to have full-load torque characteristics at the time of steady operation of the same by applying a driving signal to the governor actuator 2 from the electronic control unit 6 and increasing the fuel-flow rate according to the engine speed. With such an arrangement, it is enabled to prevent deviation of the injection timing, for instance, at the time of starting a vehicle having a diesel engine mounted thereon and to thereby prevent drop of the output torque of the vehicle.

Air-fuel control apparatus

Abstract: A system for the control of the air-fuel ratio in an internal combustion engine incorporates an electronic control unit, a sensor of exhaust emissions and a valve for metering fuel with air to control the air-fuel ratio. The electronic control unit provides for the comparison of the successive measurements of the sensor output voltage under conditions wherein the fuel valve is being operated for ever increasing richness or leaness until such time as the differential measurement drops below a predetermined amount. An offset voltage is then subtracted from or added to this voltage to calculate an operating set point voltage. Thereby, the system's accuracy is maintained through the compensation for changed sensor characteristics with aging.

Device for detecting fault conditions in a motor vehicle

Abstract: A warning device in a motor vehicle is proposed, which comprises at least one electronic control unit (10) at least for the purpose of metering the quantity of fuel allocated to the internal combustion engine. In this arrangement, the electronic control unit (10) can have at least one special input (16) to which the fault signals can be fed. If there is at least one intrinsic fault of the control unit (10), or at least one fault signal is present, the electronic control unit (10) influences the running of the internal combustion engine in specific operating states in an abnormal way, so that a defect that has occurred cannot thereby remain unnoticed. Furthermore, the warning device according to the invention permits the inclusion of conventional warning devices, in particular signal transmitters, in such fault monitoring.

Back-up system for accelerator sensor system

Abstract: PURPOSE:To attaine safe operation of a vahicle, by obtaining predetermined accelerator conditions by switching the control mode of an electronic governor to all-speed type by means of an electronic control unit, and thereby enabling to back up operation of the vehicle in case that error is caused in an accelerator sensor system. CONSTITUTION:Output signals of a sensor 1 producing an engine-speed signal, a sensor 2 producing a signal representing the injection quantity of fuel, an actuator 3 for actuating a governor, a sensor 4 producing a signal representing an injection timing signal and a sensor 5 producing an accelerator signal are furnished to an electronic control unit 6. The electronic control unit 6 applies driving signals to the governor actuator, a timer solenoid valve, etc., and the electronic governor controls the injection quantity of fuel by picking up signals from the above sensors 1, 4 and 5. In case that trouble is caused with an accelerator sensor system 5, the trouble is backed up by switching the control mode of the electronic governor from limit-speed control to all-speed control and thereby obtaining predetermined accelerator conditions.

Device for the control of fuel metering into an internal combustion engine

Abstract: A device for controlling the metering of fuel into an internal combustion engine is proposed, in which the inputs of the driver for the influencing of certain controls are fed in not by the selection of a certain operating element of the corresponding control but by certain, predeterminable operating states of the vehicle. In the example embodiment described, two operating elements for the inputs of the driver are connected in parallel or in series and connected to the electronic control unit for influencing of the fuel metering into the internal combustion engine. The inputs of the driver on one of the two operating elements are then fed by the control unit to the corresponding controls according to the speed of travel of the vehicle. It is thereby also possible to actuate the intermediate speed control and the speed-of-travel control from just one operating element.

Air-fuel ratio feedback control method for internal combustion engine

Abstract: PURPOSE: To carry out the air-fuel ratio control suitable for all kinds of cars by setting the proportional control portion and integration control portion in the air-fuel ratio feedback control to the different values according to the kind of the car, such as a car equipped with an automatic transmission and a car equipped with a manual transmission. CONSTITUTION: Into an electronic control unit 5, each detection value of a throttle valve opening degree sensor 4, absolute pressure sensor 8 in suction pipe, engine revolution angle position sensor 9, cylinder discriminating sensor 10, O 2 sensor 13, etc. is input. The electronic control unit 5 controls the valve opening time of a fuel injection valve 6 on the basis of the detection value of each sensor, and carries out the feedback control for air-fuel ratio. In case of a car equipped with an automatic transmission, each of proportional control portion and the integration control portion for the feedback control is set to the smaller value in comparison with that in case of a car equipped with a manual transmission, and generation of hunting, etc. is prevented. COPYRIGHT: (C)1987,JPO&Japio