EP0101850A2 - Dispositif de secours pour la marche au ralenti de camions - Google Patents

Dispositif de secours pour la marche au ralenti de camions Download PDF

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Publication number
EP0101850A2
EP0101850A2 EP83106751A EP83106751A EP0101850A2 EP 0101850 A2 EP0101850 A2 EP 0101850A2 EP 83106751 A EP83106751 A EP 83106751A EP 83106751 A EP83106751 A EP 83106751A EP 0101850 A2 EP0101850 A2 EP 0101850A2
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EP
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Prior art keywords
output stage
signal
microcomputer
actuator
duty cycle
Prior art date
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Granted
Application number
EP83106751A
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German (de)
English (en)
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EP0101850B1 (fr
EP0101850A3 (en
Inventor
Günter Braun
Wolfgang Dipl.-Ing. Kosak
Alfred Dipl.-Ing. Kratt
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator

Definitions

  • the invention relates to a safety emergency device according to the preamble of the main claim.
  • microprocessors or microcomputers to control electrical or electromechanical devices or to control system functions, which derive control signals for actuating actuators from one or more operating parameters of the system.
  • Devices of this type are used in motor vehicles, for example for operating injection systems, ignition systems, transmission controls or an idling filling control, in each case separately or else combined in a central logic. It is also known in this connection to provide monitoring devices which monitor the proper functioning of the device and which emit an alarm signal and / or trigger an emergency control if a malfunction occurs.
  • a SAE Technical Paper No. 810157 describes a microcomputer-controlled internal combustion engine control.
  • the microcomputer or microprocessor used in this way generates control pulses built into its control program, which are processed by the microprocessor and therefore occur regularly if they function properly.
  • a malfunction of the program or the device can then be detected by a memory circuit or another device, since in this case, for example when the computer is at a standstill, no more control pulses are emitted.
  • a monostable multivibrator is provided, the output signal of which can be fed to the injection system and the ignition device.
  • the regular control impulses are suppressed below a prescribed speed of the internal combustion engine, particularly when the internal combustion engine is started up.
  • a reset circuit for a microcomputer is also known from DE-OS 30 35 896, in which the control pulses indirectly cause the charging or discharging of a capacitor, so that the absence of the control pulses can be detected by monitoring the capacitor voltage. If there are changes in the sequence of the control pulses above a predetermined level, the monitoring circuit generates a reset signal which resets the microcomputer. The reset phase is then followed by a release phase in which the system can restart.
  • the safety emergency running device with the characterizing features of the main claim has the advantage that the digital control of the final stage driving the actuator, a perfect detection of errors by feedback of output stage output signals to the controlling computer is possible, which then generates a shutdown signal and a separate switch-off stage for the power stage so that the power stage is de-energized overall.
  • the output stage is therefore always switched off when component defects occur, for example due to alloyed output stage transistors, wire breaks on the two-winding turntable, errors in the transmission of the motor temperature through the NTC line and the like.
  • the existing correction spring provides an uncritical B y cross-fit cut for the idle charge control, which prevents unwanted accelerating.
  • the power stage is switched off in a pulsed manner using a separate failsafe circuit with a minimum duty cycle, which also results in an emergency function for a computer failure.
  • the invention takes into account linearity errors in the actuator cross section caused by correction springs or changes in battery voltage in that the safety circuit enables corrections by querying a memory in microcomputers.
  • the microcomputer is designed in such a way that an interruption or non-connection of the NTC resistor supplying an indication of the motor temperature to the computer is recognized and the output stage is switched off in the event of a fault, likewise an interruption of the ignition signals is recognized and the output stage is switched off in the event of a fault.
  • FIG. 1 shows the block diagram of the safety circuit with an external failsafe circuit
  • FIG. 2 shows a first detailed embodiment Example of the output stage area with an associated switch-off stage
  • Fig. 3 shows a detailed representation of a converter for converting voltage signals into a time-duration signal that can be evaluated by the computer
  • Fig. 4 shows signal curves at different circuit points in the circuit of Fig. 2
  • FIG. 6 signal curves at different circuit points of the exemplary embodiment of FIG. 5.
  • 10 denotes a microcomputer or microprocessor which serves to control certain system functions, for example an idle charge control in a motor vehicle.
  • the microcomputers 10 are peripherally assigned to the modules provided for system security and the required reaction in the event of a fault;
  • the microcomputer 10 is supplied with signals to be processed at its input 10a via a data line 11 from a block which is only shown schematically at 12, that depend on the operating parameters of the system to be controlled or controlled.
  • these operating parameters can, for example, provide information about the actual value of the current speed of the motor vehicle, about the setpoint at this time, about climatic conditions such as pressure and Outside temperature, the position of the throttle valve u. the like.
  • the microcomputer 10 creates a control signal sequence at its signal output 10b which is used to control actuators via an output stage 13, in the present case a so-called two-winding rotary actuator 14 , which is connected in parallel with the throttle valve in the idle charge control as an air bypass and has a slide 14a, the position of which determines the desired passage cross-section based on the type of supply of clocked signals to the two partial windings 15a, 15b of the two-winding rotary actuator 14 via the output stage 13 results.
  • a biasing spring 16 also acts on the actuator, that is, on the slide 14a of the two-winding rotary actuator 14 in the application example, which in the event of a fault mitigates and switches off the possible emergence of dangerous driving situations due to faulty non-activation of the two-winding rotary actuator, in particular, for example, in maneuvering and pushing operation that in this case a bypass cross-section required for driving safety is set mechanically with minimal passage.
  • the two-winding turntable is controlled by a single digital control pulse train, usually a rectangular pulse train via the output stage 13 by the microcomputer 10, it is the duty cycle ⁇ of the drive pulse train that determines the position of the slide 14a of the two-winding rotary control, the division of the individual pulses in push-pull is made by the power amplifier 13.
  • the actuator Since the bias spring 16 constantly acts to return the two-winding rotary actuator 14 to the safety position, the actuator receives a non-linear profile and a battery voltage dependency due to the travel-dependent spring characteristic, since partial compensation of the constant spring action can be achieved by appropriate design of the partial winding 15a, 15b.
  • the computer 10 is therefore supplied with a battery voltage signal U BATT at a connection point 17 and converted into a time duration signal t B via an interposed analog-digital converter 18 and supplied to the input 10c of the computer.
  • a temperature signal of the engine ⁇ Mot from the connection 20 to the computer input lOd which is decisive for the idle charge control, is in turn converted by the converter circuit 19 into a corresponding, temperature-related time duration signal t ⁇ .
  • the temperature and battery voltage signals can also be read into the computer by means of external (or internal.) A / D converters.
  • the microcomputer 10 determines the required basic duty cycle ⁇ from the input parameters and corrects it for the influence of the battery voltage and the stored spring force influence (non-linear characteristic curve) by querying an external data memory, which in the block diagram in FIG. 1 with 21 is designated and a PROM, EPROM u. Like. Can be; the data flow from the data memory 21 after appropriate addressing by the computer 10 is shown by the multi-line arrows.
  • the circuit is completed by a so-called computer-internal first control and safety function, which is based on the fact that corresponding inputs 10e and 10f of the computer via feedback lines 22, 23 are used to supply the actuating signals of the two end part stages responsible for one of the partial windings of the two-winding turntable, so that the computer can, in the event of a deviation of the returned pulse duty factor ⁇ 'of the windings of the two-winding rotary actuator from the pulse duty factor ⁇ of the control signal sequence of its output 24, supply a switch-off signal via an intermediate OR gate 25 to a blocking block 26 which switches off the output stage; since the computer also outputs so-called failsafe pulses or control pulses at its output 27, the occurrence of which ensures proper functioning of the computer, can be supplemented
  • an external safety or so-called failsafe circuit 28 which is also provided, via the same OR gate 25 likewise feed a switch-off signal to the switch-off block 26 in the event of a fault.
  • This switch-off signal also serves as a reset signal for the microcomputer 10 and is therefore fed to its input 10g.
  • the output stage 13 comprises two output stage semiconductor switches, namely the switching transistors Tl and T2, the collector of Tl over the Connection point M1 is connected to the first partial winding 15a and the collector of the switching transistor T2 is connected to the second partial winding 15b of the two-winding turntable 14 via the connecting point M2.
  • the two collectors are then each connected to the positive battery voltage via diodes D1 and D2 which are polarized in the reverse direction and to which connection point (M +) the two merged connections of the partial windings 15a, 15b are also connected.
  • the two switching transistors T1 and T2 of the output stage 13 are driven by an upstream driver transistor TO, to which the drive pulse sequence with the pulse duty factor ⁇ is supplied from the output 10b of the microcomputer 10 at the connection point 29.
  • the control signal sequence passes from the driver transistor T0 to the first switching transistor T1, which then controls the second switching transistor T2 connected downstream with its collector via the voltage divider resistors R1, R2.
  • the two output stage transistors T1 and T2 alternately work in push-pull on the partial windings, whereby the relative position of the slide 14a on the two-winding rotary actuator results from the respective, relative time periods of the pulses (current time areas) supplied to the corresponding partial windings.
  • the current switching states on the two-winding turntable 14 are monitored by detecting the control signals at the switching points M1 and M2 to the partial windings 15a, 15b and pass through resistors R7, R8 with correspondingly assigned calming or pulse-shaping stages from diodes D5, D4, capacitor switches connected in parallel C1 and C2 as well as resistors R9, R10 as actuator signals Ü1 and Ü2 indicating the current duty cycle. ⁇ 'to the inputs 10e, 10f of the microcomputer 10.
  • the switch-off stage 26 which comprises a series transistor T5 with its emitter against ground, the collector of which is connected to the two combined emitters of the switching transistors T1 and T2 of the output stage 13.
  • the triggering of the series transistor T5, which, depending on whether it is switched on or off, can also switch off the output stage 13, is carried out via an upstream further transistor T4, whose input terminal 30 is supplied with the switch-off signal from the output 24 of the microcomputer 10. Oring with the reset signal of the safety circuit 28 present at the other input connection 31 is effected in that the reset signal is supplied via a diode D1 at the connection point of two resistors R14, R13 in the control circuit between the pre-stage transistor T4 and the base of the series transistor T5.
  • the waveform at d) represents the shutdown signal issued by the microcomputer 10 itself;
  • the waveforms corresponding to e) and f) are the returned actuator signals Ü1 and Ü2 with the current duty cycle ⁇ ';
  • the signal curve at g) indicates the reset signal which comes from the failsafe circuit and at h) the failsafe or control pulses issued by the microcomputer 10 are shown which are fed to the failsafe circuit 28.
  • the computer 10 checks whether the read signals U1, U2 during times t 1 and t 2 correspond to the required signal curve with the pulse duty factor q.
  • the switch-off signal corresponding to d) goes high at time t 0 and thus de-energizes the switching transistors T1 and T2, so that their collectors assume high signals in accordance with b) and c).
  • This high-level signal passes from the switching point M + to the collectors via the partial windings 15a, 15b. This shutdown of the computer can only be canceled by switching off the engine and restarting.
  • the failsafe circuit 28 is used for compensation internal and external faults, also on the computer itself or, if applicable, a voltage drop.
  • the failsafe pulses supplied to the failsafe circuit 28 by the computer corresponding to h) in FIG. 4 are omitted, so that the failsafe circuit 28 with its reset signal corresponding to g) going low via the OR link 25 to the series transistor T5 switches off the output stage and at the same time provides a hardware reset for the computer.
  • the failsafe circuit is designed so that in the event of a fault it then works itself as a free-running oscillator; it comprises at least one capacitor continuously charged by the control pulses of the microcomputer 10, so that an input signal tapped via this capacitor arrives at an input of a threshold value comparator circuit and, in the absence of the control pulses, the comparator output is switched over in accordance with the low potential of the reset signal a subsequent release signal of shorter duration by feedback of the output to the input.
  • the failsafe circuit therefore operates in the manner of a monoflop, with the release time being designated t 3 and the reset time t 4 in curve profile g) of FIG. 4.
  • Another fault can be the additional dependencies of the bypass cross-section set by the two-winding rotary actuator on the battery voltage, the spring characteristic and the motor temperature. It is initially assumed that the time signals received by the microcomputer 10 according to the conversion at its inputs 10c, 10d are within the usual limit values. In this case, the computer carries out corresponding corrections or additions to the duty cycle setting by querying the memory 21.
  • the _Fig. 3 explains an embodiment of a converter to which an input voltage Us to be converted into a time period, which can be the battery voltage or a voltage proportional to the engine temperature, is supplied.
  • the connection point with the voltage to be converted is designated 32; this voltage reaches a capacitor C3 via the transistor T6, which is turned on at the input 33 in the absence of an interrogation signal by the microcomputer. This capacitor is constantly charged to the voltage Us to be converted. If the query pulse appears at connection 33 from the computer, transistor T6 is blocked and capacitor C3 discharges via a circuit which is initially shown as adjustable resistor R18 until the reference voltage present at resistors R19, R20 at a downstream comparator K1 falls below is.
  • the comparator K1 changes at this moment its output signal U a, for example from high to low, and feeds this signal to the computer.
  • the computer is designed in such a way that it counts the time from the setting of the interrogation pulse to the appearance of the comparator signal, so that there is a proportionality between the determined time t s and the voltage U s. If a linear relationship between these two variables is desired - if the computer cannot or should not compensate for a non-linear relationship by correspondingly querying the memory 21, the capacitor C3 can also be discharged via a constant current source.
  • a further important malfunction is an interruption in the line supplying the temperature signal to the converter 19 in FIG. 1, for example from an NTC resistor near the motor.
  • the computer normally increases the bypass cross-section accordingly due to its warm-up program, so that an increase in speed can also occur.
  • the resistance range of the NTC resistor used here for example, for temperature measurement, only extends within predefined limits (in the preferred exemplary embodiment between approximately 26 kilohms, which corresponds to a maximum voltage applied to the converter 19 and a maximum time period t that can be determined by the computer, approximately - 30 C, up to less than 400 ohms, which then corresponds to the minimum voltage and the minimum duration pulse, at about + 80 ° C).
  • the instruction entered in the microcomputer 10 is irregular Detect case, so that the computer immediately or after averaging over two to five query periods sets an uncritical value for the engine temperature, which corresponds, for example, to the room temperature of + 20 ° C or a regulated value of + 80 ° C.
  • the computer gives up this safety function.
  • an interruption of the ignition signal is important as a malfunction, since in this case the actual speed value n fed to the microcomputer 10 is significantly smaller than a desired speed value n should is intended. Accordingly, the computer in this case is n actual, n is to be simulated, and the computer completely sets the bypass to avoid the engine going out, so that a dangerous speed increase may occur.
  • n is in the range should be ⁇ n - n -1 1000 detected the absence of ignition pulses and depending on the requirement for absence of two responding to about five ignition pulses with a disconnection of the output stage becomes. This switch-off can then be canceled again with the corresponding speed position after the arrival of new ignition pulses, if the line originating from terminal 1 of the internal combustion engine has a loose connection.
  • FIG. 5 of a completed safety emergency running device with a large number of optional configurations shows the individual assemblies in broken lines randet, components identical to the preceding exemplary embodiments and performing the same functions being identified by the same reference numerals; comparable components are identified with the same reference number and additionally with a comma at the top.
  • the circuit shown in Fig. 5 comprises the block 35 responsible for the control and regulation of the system functions, containing microprocessors, microcomputers, logic control or sequence circuits with microcomputer 10 ', memory 21' and a stabilizer circuit 36, the output stage 13 ', the block 26 'for the power stage shutdown, a failsafe or safety circuit 28', a circuit 37 for processing the power stage monitoring signals Ü1 and Ü2 and an emergency operation circuit 38.
  • the emergency running circuit 38 is only provided as an option; if it is present, then in the practical exemplary embodiment the output stage shutdown 26 ′ and possibly also the conditioning of the output stage monitoring signals by the circuit 37 can be dispensed with.
  • the failsafe circuit 28 ' which can also be referred to as a so-called watch-dog circuit, as control pulses now the control signal pulses THV issued by the microcomputer 10', which the Duty cycle ⁇ corresponding to the bypass cross-section required by the computer for the respective operating state are supplied.
  • the THV pulses reach the output stage 13 'via a comparator K1 which is additionally provided, a reference signal generated at 39 being fed to the other input of K1.
  • the microcomputer 10 basic function is as follows, the special structure of the failsafe circuit 28 'and the emergency running generator being discussed further below. Since the switching transistors T1 and T2 can only work alternately, however, for safety reasons, as is readily apparent, only the "opening" of the two-winding turntable by the transistor T2 which was last activated in accordance with the agreement is critical, the microcomputer 10 'basically only needs the collector signal of the transistor T2, pulse-shaped by the one pulse shaping stage 37a from the series resistor R8, followed by the parallel connection of the diode D4, the resistor R10 and the capacitor C2 as a final stage monitoring signal U2.
  • the computer queries the pulse ratio via Ü2 for correctness very shortly before and very shortly after each new duty cycle output. If the computer detects a deviation in the duty cycle, it itself sets the output EA (output stage shutdown) to low and the output stage switching transistors T1 and T2 are de-energized via the additional comparator K2 and the transistors T4 and T5 already mentioned above. As a result, the two-winding turntable, which is connected to the switching points Ml, M2 and M +, is de-energized and the spring pulls it to the specified safety cross-section back, which corresponds, for example, to a speed of approximately 1400 n when the engine is warm.
  • EA output stage shutdown
  • the structure and function of the failsafe circuit are as follows.
  • the THV drive pulses from the computer reach a transistor T6 via a diode D6, which charges a storage capacitor C3.
  • the storage capacitor C3 is connected to an inverting input of a threshold stage, which is represented in a known manner by a comparator K4 with appropriate wiring.
  • a resistor R16 and a series connection of a resistor R17 and a diode D7 are arranged in a negative feedback branch to the inverting input.
  • the THV drive pulses from the microcomputer 10 'are absent which is one Failure of the computer can correspond to the failsafe circuit 28 ', which takes over and operates as a square wave oscillator with a pulse duty factor of low, for example 135 ms and high, about 18 ms in the reset signal.
  • the reset signal then goes, as already explained above, to the reset and restarting to the microcomputer 10 'and reaches the output stage switch-off 26' via the diode D3, which due to the high phases and the resulting influence on the emergency running cross-section on the two-wheel drive ' Development turntable can result in idle speed changes between 200 to 300 n up or down.
  • the alternative embodiment with the emergency running generator 38 comprises a free-running oscillator 01, formed by a comparator K3, which is also coupled via a resistor R18 and is negatively coupled via a resistor R19, a capacitor C4 being connected in parallel with the resistor R20 to ground from the inverting input is.
  • the emergency operation signal ⁇ NOT reaches the inverting input of the comparator K1 connected upstream of the driver transistor TO, but can also control the output stage at another point, for example directly at the base of the driver transistor T0.
  • the limp-home generator 28 can be started by the reset signal of the failsafe circuit 28 'via a diode D8, but it can also oscillate continuously with a predetermined pulse duty factor such that in normal operation this is within the pulse duty factor sequence of the drive pulse sequence THV typically output by the microcomputer 10' and therefore in this case does not come into effect.
  • an advantageous embodiment of the invention can include both measures, however, because in the event of an error in the output stage shutdown 26 ', the emergency operation signal then brings the position of the slide of the two-winding rotary actuator into an uncritical range.
  • the pulse shaper stages 37a, 37b are connected in parallel in front of the respective connection resistors R8 and R7, that is to say in each case starting from the circuit points M1 and M2, interference protection zener diodes D9, D10; Furthermore, with regard to the safety concept, it can be useful to carry out the generation of the output stage monitoring signals U1, U2 with high impedance by inserting comparators into the two connecting lines back to the computer, as indicated at 40, which makes it possible to switch off the To decisively reduce current at least in the UP winding of the two-winding turntable.
  • a simple transistor stage (emitter circuit) is also useful here if the semiconductors are integrated on an IC or hybrid.
  • a further embodiment comprises the insertion of an additional emitter resistor Rx from the emitter of the output stage cut-off series resistor T5 to ground and, in parallel with the base-emitter resistor, the arrangement of a zener diode D11 in this transistor, optionally in series with a further diode D12.
  • Rx additional emitter resistor
  • the switching transistors T1 and T2 can optionally be equipped with an additional emitter resistor R21, R22 and a limiting diode path for the purpose of current limitation. parallel to the resistor connected from the base to ground, either from the series connection of a Zener diode D12, D13 with another diode D14, D15 or only from the Zener diode D12, D13.
  • THV low
  • the first switching transistor Tl is conductive
  • the UP winding of the two-winding turntable nominal current connected to it carries and the second switching transistor T2 is blocked by the divided saturation voltage of the transistor Tl.
  • the CLOSE winding of the two-winding turntable is de-energized.
  • the CLOSE winding carries nominal current.
  • the opening cross-section on the two-winding turntable is directly proportional to the ratio of the currents in the switch-on times.
  • the shift in the characteristic curve in the UP direction caused by the base current of the transistor T2, which is also dependent on the duty cycle, can be taken into account when constructing the two-winding rotary actuator.
  • the output signal at the collector of transistor T2 is inverted to the THV control signal; This signal is limited by the simply constructed pulse shaper stage 37a and fed back to the microcomputer 10 'as a Ü2 output stage monitoring signal.
  • the output stage shutdown signal EA which is output by the microcomputer 10 ', is clamped to low by the direct link via the diode D3 to the output of the failsafe circuit 28', whereby the comparator K2 and the driver transistor T4 block the series transistor T5 to the output stage switching transistors and the two-winding rotating studio windings are accordingly de-energized.
  • the signal shaping stage 37a and possibly 37b draw a current from the CLOSE winding or the OPEN winding which is additionally reduced by comparators 40 which are optionally connected downstream.
  • the built-in spring adjusts an emergency running cross-section on the two-turn turntable.
  • the computer After each THV-pulse output, for example, at the time t7, the computer checks after a predetermined time period t 8 - t 7 ⁇ 100 microseconds compliance of the U2-or. Ü2 and Ü1 signal level with the THV signal level. In the event of a deviation, e.g. B. Fault at time t 9 - the transistor T2 is no longer blocking, the Ü2 signal does not become high during the period t 10 ... t 11 - the computer switches via its I / O line (signal goes low) and the comparator K2 ultimately turns off the transistor T5 and de-energizes the actuator.
  • a deviation e.g. B. Fault at time t 9 - the transistor T2 is no longer blocking
  • the Ü2 signal does not become high during the period t 10 ... t 11 - the computer switches via its I / O line (signal goes low) and the comparator K2 ultimately turns off the transistor T5 and de-energizes the actuator.
  • a power amplifier monitoring routine in the microcomputer 10 'then checks after a predetermined time, for example every 2 seconds, by switching on the EA line and corresponding interrogation of the Ü2 return line after a predetermined time, approximately after 100 ⁇ s (this corresponds to approximately five times the duration of the transistor switching times inclusive Filtering) whether the fault is still relevant.
  • the resultant influencing of the actuator current by this brief query essentially does not lead to one Change in the emergency cross-section set by the spring on the two-winding turntable.
  • the failsafe circuit 28 takes over as a rectangular oscillator. It works with its reset signal on the microcomputer 10 'in order to be able to reset and restart it if necessary, the reset phases likewise only having a slight influence on the emergency running cross-section on the actuator.
  • the Ü2 signal (and also the Ül signal) must return to high level; if this is not the case, for example in the event of an external short to ground, then the output stage remains switched off due to the computer programming being made.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Safety Devices In Control Systems (AREA)
EP83106751A 1982-07-23 1983-07-09 Dispositif de secours pour la marche au ralenti de camions Expired EP0101850B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3227546 1982-07-23
DE3227546 1982-07-23
DE3322240A DE3322240A1 (de) 1982-07-23 1983-06-21 Sicherheits-notlaufeinrichtung fuer den leerlaufbetrieb von kraftfahrzeugen
DE3322240 1983-06-21

Publications (3)

Publication Number Publication Date
EP0101850A2 true EP0101850A2 (fr) 1984-03-07
EP0101850A3 EP0101850A3 (en) 1984-08-01
EP0101850B1 EP0101850B1 (fr) 1988-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106751A Expired EP0101850B1 (fr) 1982-07-23 1983-07-09 Dispositif de secours pour la marche au ralenti de camions

Country Status (4)

Country Link
US (1) US4580220A (fr)
EP (1) EP0101850B1 (fr)
JP (1) JPS5934449A (fr)
DE (2) DE3322240A1 (fr)

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GB2155208A (en) * 1984-03-10 1985-09-18 Lucas Ind Plc Control system
EP0143313A3 (en) * 1983-11-26 1986-01-22 Robert Bosch Gmbh Safety device for an electronically, microcomputer-controlled combustion engine
EP0188404A3 (en) * 1985-01-18 1987-04-15 Voest-Alpine-Friedmann Gesellschaft M.B.H. Device for controlling and regulating the operating range of a control rod in an injection combustion engine
GB2185596A (en) * 1986-01-22 1987-07-22 Honda Motor Co Ltd Abnormality detecting method for air-fuel ratio control system for internal combustion engines
GB2186714A (en) * 1986-02-13 1987-08-19 Honda Motor Co Ltd Air supply control arrangement for an internal-combustion engine
DE3710154A1 (de) * 1986-03-27 1987-10-22 Honda Motor Co Ltd Verfahren zur abnormalitaetsdetektion fuer einen sauerstoffkonzentrationssensor
EP0569227A1 (fr) * 1992-05-08 1993-11-10 Zexel Corporation Système de commande d'injection de carburant pour moteur à combustion interne
FR2830090A1 (fr) * 2001-09-22 2003-03-28 Bosch Gmbh Robert Procede et dispositif de surveillance de la commande d'un element d'actionnement

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JPH0811942B2 (ja) * 1984-07-11 1996-02-07 株式会社日立製作所 エンジン制御装置
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JPS61207855A (ja) * 1985-03-11 1986-09-16 Honda Motor Co Ltd 内燃エンジンの燃料供給制御装置
JP2679970B2 (ja) * 1985-10-21 1997-11-19 株式会社日立製作所 アイドル回転速度制御装置
JPS62106524A (ja) * 1985-11-01 1987-05-18 Clarion Co Ltd 車載用の機器のマイクロコンピユ−タリセツト回路
JPS62261640A (ja) * 1986-05-07 1987-11-13 Mitsubishi Electric Corp 内燃機関用燃料噴射制御装置の故障時制御装置
DE3720255A1 (de) * 1987-06-19 1988-12-29 Bosch Gmbh Robert System zur einstellung des drosselklappenwinkels
US5182755A (en) * 1987-06-19 1993-01-26 Diesel Kiki Co., Ltd. Malfunction checking system for controller
US4768013A (en) * 1987-07-01 1988-08-30 Nissan Motor Company, Limited Method and apparatus for diagnosing failure in idle switch for internal combustion engines
JPS6461830A (en) * 1987-08-31 1989-03-08 Aisin Seiki Protecting device for automobile microcomputer
DE3733623A1 (de) * 1987-10-05 1989-04-13 Bosch Gmbh Robert Einrichtung zur einstellung einer betriebskenngroesse einer brennkraftmaschine
DE8817191U1 (de) * 1988-07-28 1993-12-02 Robert Bosch Gmbh, 70469 Stuttgart Anordnung für definierte Schaltung eines Mikrorechners in Wartebetriebsart
AU614178B2 (en) * 1988-07-29 1991-08-22 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Fail-safe device for a temperature sensor
US5184025A (en) * 1988-11-14 1993-02-02 Elegant Design Solutions, Inc. Computer-controlled uninterruptible power supply
US5019717A (en) * 1988-11-14 1991-05-28 Elegant Design Solutions Inc. Computer-controlled uninterruptable power supply
DE3909396A1 (de) * 1989-03-22 1990-10-04 Bayerische Motoren Werke Ag Vorrichtung zur bemessung der leerlaufluft von brennkraftmaschinen
DE3926377C2 (de) * 1989-08-04 2003-03-06 Bosch Gmbh Robert Elektronisches Steuergerät für eine Brennkraftmaschine
JPH03233160A (ja) * 1990-02-08 1991-10-17 Mitsubishi Electric Corp エンジンの制御装置
JP2504289B2 (ja) * 1990-05-21 1996-06-05 宇部興産株式会社 押出プレス用後面設備サブストレッチャのテ―ルストック
DE4130712A1 (de) * 1991-09-14 1993-03-18 Kloeckner Humboldt Deutz Ag Steuerung elektromagnetischer ventile
CN1126522A (zh) * 1994-04-06 1996-07-10 菲利浦电子有限公司 微处理器用复位和监视系统及包含这种微处理器和这种系统的器具
DE19516208C1 (de) * 1995-05-03 1996-07-25 Siemens Ag Verfahren zur Überwachung einer Leistungsendstufe und Schaltungsanordnung zur Durchführung dieses Verfahrens
DE19541734C2 (de) * 1995-11-09 1997-08-14 Bosch Gmbh Robert Schaltungsanordnung zur Durchführung eines Reset
DE19722288A1 (de) * 1997-05-28 1998-12-03 Bosch Gmbh Robert Verfahren und Vorrichtung zur Regelung eines Stellelements mit integralem Verhalten
US6359794B1 (en) 1999-12-01 2002-03-19 Acme Electric Corporation Battery backup power supply
EP3127795B1 (fr) * 2014-03-31 2019-03-13 Honda Motor Co., Ltd. Système de dispositif d'éclairage à del pour véhicule

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JPS588249A (ja) * 1981-07-08 1983-01-18 Mazda Motor Corp エンジンのアイドル回転制御装置
JPS5827831A (ja) * 1981-08-11 1983-02-18 Toyota Motor Corp 内燃機関用空気流量制御装置
DE3238189A1 (de) * 1982-10-15 1984-04-19 Robert Bosch Gmbh, 7000 Stuttgart Leerlauf-regelsystem fuer eine brennkraftmaschine
JPS6040837U (ja) * 1983-08-30 1985-03-22 富士重工業株式会社 エンジンのピツチングストツパ装置

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AU570730B2 (en) * 1983-11-26 1988-03-24 Robert Bosch Gmbh Microcomputer controlled position setting system
EP0143313A3 (en) * 1983-11-26 1986-01-22 Robert Bosch Gmbh Safety device for an electronically, microcomputer-controlled combustion engine
GB2155208A (en) * 1984-03-10 1985-09-18 Lucas Ind Plc Control system
EP0188404A3 (en) * 1985-01-18 1987-04-15 Voest-Alpine-Friedmann Gesellschaft M.B.H. Device for controlling and regulating the operating range of a control rod in an injection combustion engine
GB2185596A (en) * 1986-01-22 1987-07-22 Honda Motor Co Ltd Abnormality detecting method for air-fuel ratio control system for internal combustion engines
GB2185596B (en) * 1986-01-22 1989-10-25 Honda Motor Co Ltd Abnormality detecting method for air-fuel ratio control system for internal combustion engines
GB2186714A (en) * 1986-02-13 1987-08-19 Honda Motor Co Ltd Air supply control arrangement for an internal-combustion engine
GB2186714B (en) * 1986-02-13 1990-02-14 Honda Motor Co Ltd Air supply control arrangement for an internal-combustion engine
DE3710154A1 (de) * 1986-03-27 1987-10-22 Honda Motor Co Ltd Verfahren zur abnormalitaetsdetektion fuer einen sauerstoffkonzentrationssensor
EP0569227A1 (fr) * 1992-05-08 1993-11-10 Zexel Corporation Système de commande d'injection de carburant pour moteur à combustion interne
FR2830090A1 (fr) * 2001-09-22 2003-03-28 Bosch Gmbh Robert Procede et dispositif de surveillance de la commande d'un element d'actionnement
US7035074B2 (en) 2001-09-22 2006-04-25 Robert Bosch Gmbh Method and arrangement for monitoring the drive of an actuator
DE10146781B4 (de) * 2001-09-22 2015-02-12 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung der Ansteuerung eines Stellelements

Also Published As

Publication number Publication date
EP0101850B1 (fr) 1988-01-20
DE3322240A1 (de) 1984-01-26
DE3375420D1 (en) 1988-02-25
JPH0541823B2 (fr) 1993-06-24
DE3322240C2 (fr) 1991-12-19
JPS5934449A (ja) 1984-02-24
US4580220A (en) 1986-04-01
EP0101850A3 (en) 1984-08-01

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