Classifications

• • 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
  • F02D41/02—Circuit arrangements for generating control signals
  • F02D41/14—Introducing closed-loop corrections
  • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
  • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
  • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
• • 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
  • F02D41/28—Interface circuits
• • 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
  • F02D41/28—Interface circuits
  • F02D2041/281—Interface circuits between sensors and control unit
• • 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
  • F02D41/28—Interface circuits
  • F02D2041/281—Interface circuits between sensors and control unit
  • F02D2041/285—Interface circuits between sensors and control unit the sensor having a signal processing unit external to the engine control unit
• • 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
  • F02D41/28—Interface circuits
  • F02D2041/286—Interface circuits comprising means for signal processing

Definitions

• the disclosure relates to a method for operating a control unit for an exhaust gas probe, in particular for a broadband lambda probe.
• the disclosure also relates to a computing device for carrying out such a method.
• Preferred embodiments relate to a method for operating a control unit for an exhaust gas probe, in particular for a broadband lambda probe for an internal combustion engine, in particular a motor vehicle, the control unit being designed to electrically control the exhaust gas probe, the control unit in particular in the form of an application-specific integrated circuit, ASIC, is implemented, wherein the method comprises: specification of control data for an operation of the control unit and / or the exhaust gas probe by means of a computing device, receiving operating data characterizing the operation of the control unit and / or the exhaust gas probe by means of the computing device.
• the computing device has at least one computing unit for executing at least one computer program, which is designed in particular to at least temporarily control an operation of the control unit and / or the exhaust gas probe and / or to generate the control data and / or the Receive operational data.
• the computing device at least partially implements a sequence control for operating the exhaust gas probe, in particular the sequence control being specified at least partially by means of at least one computer program or by means of the at least one computer program.
• sequence control being specified at least partially by means of at least one computer program or by means of the at least one computer program.
• the computing device at least partially implements a primary sequence control for operating the exhaust gas probe, in particular a secondary sequence control of the control unit being controlled by means of the primary sequence control.
• the sequence control can advantageously be distributed to the computing device and the control unit, such parts of the sequence control for operating the exhaust gas probe that are to be easily changeable being implemented by means of the computing device, e.g. in the form of a computer program, and such parts, for example the sequence control for an operation of the exhaust gas probe, which have special timing requirements and should be changed comparatively seldom, can be implemented by means of the control unit, which is designed, for example, as an ASIC.
• sequence control for the operation of the exhaust gas probe can also be referred to as a “sequencer” or “sequencer”, whereby according to further preferred embodiments a high-level sequencer, for example in the form of the primary ones described above by way of example Sequence control is implemented by means of the computing device, and wherein, according to further preferred embodiments, a low-level sequencer, for example in the form of the secondary sequence control described above by way of example, is implemented by means of the control unit, for example in the form of an ASIC.
• the sequence control and / or the primary sequence control at least temporarily controls at least one of the following processes: a) definition of time intervals between measurements, b) transmission of default values for switch positions to the control unit, c) transmission of, in particular measured values that can be determined by the control unit to the computing device, d) identification and / or plausibility check of measured values received by the control unit, in particular with respect to a respective expected measured value, e) retrieval of status information, in particular error information, from the control unit, f) activation ("triggering") ") a pump current regulator of the control unit, in particular after receiving a new Nernstvoltage measured value, g) setting switches of the control unit, in particular so that no short circuits and / or power interruptions occur, h) starting measurements by means of or the analog digita I converter, in particular synchronously with a reference signal or reference clock, i) resetting (resetting) an input filter of an analog-to-digital converter, j) data
• the computing device has at least one computing unit, at least one of the Storage unit assigned to a computing unit for at least temporary storage of a computer program and / or data (e.g. data for sequence control of the operation of the exhaust gas probe), the computer program being designed in particular to carry out one or more steps of the method according to the embodiments.
• the computing unit has at least one of the following elements: a microprocessor, a microcontroller, a digital signal processor (DSP), a programmable logic module (e.g. FPGA, field programmable gate array), at least one computing core. Combinations of these are also conceivable in further preferred embodiments.
• the memory unit has at least one of the following elements: a volatile memory, in particular a working memory (RAM), a non-volatile memory, in particular flash EEPROM.
• a volatile memory in particular a working memory (RAM)
• a non-volatile memory in particular flash EEPROM.
• FIG. 1 For example the aforementioned computing unit, cause the computer to execute the method according to the embodiments.
• the computing device can have an optional, preferably bidirectional, data interface for receiving the data carrier signal.
• the computing device can, by means of the optional data interface, also receive input signals that can be used for its operation, for example from the exhaust gas probe and / or the control unit, and / or output signals, for example control data for output an operation of the exhaust gas probe and / or the control unit to the control unit and / or the exhaust gas probe.
• the computing device has an analog-to-digital converter, ADC, and at least temporarily digitizes at least one analog signal from the exhaust gas probe and / or an analog signal derived from the analog signal of the exhaust gas probe by means of the control unit.
• ADC can also be part of the data interface, for example.
• control unit for an exhaust gas probe in particular for a broadband lambda probe for an internal combustion engine, in particular a motor vehicle
• the control unit being designed to electrically control the exhaust gas probe
• the control unit being implemented in particular in the form of an application-specific integrated circuit, ASIC is, wherein the control unit is designed to carry out the following steps: receiving control data for an operation of the control unit and / or the exhaust gas probe from a computing device, wherein the computing device is designed in particular according to the embodiments, sending the operation of the control unit and / or the Operating data characterizing the exhaust gas probe to the computing device.
• control unit at least partially implements a sequence control for operating the exhaust gas probe, the sequence control of the control unit at least temporarily controlling at least one of the following sequences: G) setting switches of the control unit, in particular so that no short circuits and / or current interruptions occur, H) starting measurements by means of an analog-digital converter, preferably integrated into the control unit, in particular synchronously with a reference signal or reference clock, I)
• FIG. 1 schematically shows a simplified block diagram of a
• FIG. 2 schematically shows a simplified block diagram of a computing device according to further preferred embodiments
• FIG. 5A schematically shows a simplified flow diagram of a method according to further preferred embodiments
• 5B schematically shows a simplified flow diagram of a method according to further preferred embodiments.
• FIG. 6 schematically shows a simplified flow diagram of a method according to further preferred embodiments.
• FIG. 1 shows schematically, using an example of a gasoline engine, the technical environment in which the method can be used in accordance with preferred embodiments.
• Air is supplied to an internal combustion engine 10 via an air supply 11 and its mass is determined with an air mass meter 12.
• the air mass meter 12 can be designed as a hot film air mass meter.
• the exhaust gas from the internal combustion engine 10 is discharged via an exhaust gas duct 16, with the exhaust gas downstream in the direction of flow Internal combustion engine 10 an exhaust gas purification system 17 is provided.
• an engine controller 14 which, on the one hand, controls the amount of fuel supplied to the internal combustion engine 10 via a fuel metering device 13 and, on the other hand, controls the signals from the air mass meter 12 and an exhaust gas probe 15 arranged in the exhaust gas duct 16, e.g. upstream of the exhaust gas cleaning system 17 are fed.
• the exhaust gas probe 15 determines an actual lambda value of a fuel-air mixture supplied to the internal combustion engine 10 and can, for example, form part of a lambda control circuit assigned to the internal combustion engine 10.
• the exhaust gas probe 15 can be designed, for example, as a broadband lambda probe.
• a control unit 100 is provided which is designed in particular for the electrical control a1 of the exhaust gas probe 15 or of components of the exhaust gas probe 15.
• the control unit 100 can be designed in the form of an ASIC and, for example, can be integrated into the engine controller 14.
• Preferred embodiments relate to a method for operating the control unit 100 for the exhaust gas probe 15, in particular for a broadband lambda probe for an internal combustion engine, in particular a motor vehicle, the method having the following steps, cf. the flowchart from FIG Control data SD for operating the control unit 100 and / or the exhaust gas probe 15 by means of a computing device 300 (FIG. 1), receiving 210 (FIG.
• control unit 100 no change to the control unit 100 itself is required, which, if the control unit 100 is designed as an ASIC, requires a comparatively large amount of effort (for example, changing the mask for the ASIC, new chip pattern).
• the steps 205, 210 according to FIG. 5A advantageously indicate an efficient and flexible sequence control 200 for the operation of the exhaust gas probe 15 and / or its control unit 100.
• the specification 205 of the control data SD can include a generation 205a (FIG. 5A) of the control data SD by means of the computing device 300, for example by a computer program.
• the computing device 300 has at least one computing unit 302 for executing at least one computer program PRG1, which is in particular designed to at least temporarily operate the control unit 100 (FIG. 1) and / or of the exhaust gas probe 15 and / or to generate the control data SD (cf. step 205a from FIG. 5A) and / or to receive 210 the operating data BD.
• PRG1 at least one computer program PRG1
• the computing device 300 at least partially implements a sequence controller 200 (FIG. 5A) for operating the exhaust gas probe 15, with the sequence controller 200 in particular at least partially using the at least one computer program PRG1 (FIG. 2) is specified.
• a sequence controller 200 for operating the exhaust gas probe 15
• the sequence controller 200 in particular at least partially using the at least one computer program PRG1 (FIG. 2) is specified.
• the computing device 300 has at least one computing unit 302, at least one memory unit 304 assigned to the computing unit 302 for at least temporary storage of a computer program PRG1 and / or data DAT (e.g. data for the operational sequence control 200 the exhaust gas probe 15), the computer program PRG1 being designed in particular to carry out one or more steps of the method according to the embodiments.
• a computer program PRG1 and / or data DAT e.g. data for the operational sequence control 200 the exhaust gas probe 15
• the computer program PRG1 being designed in particular to carry out one or more steps of the method according to the embodiments.
• the computing unit 302 has at least one of the following elements: a microprocessor, a microcontroller, a digital signal processor (DSP), a programmable logic module (for example FPGA, field programmable gate array), at least one Calculation kernel. Combinations of these are also conceivable in further preferred embodiments.
• the computing device 300 is preferably designed, for example, as a microcontroller with one or more computing cores 302.
• the memory unit 304 has at least one of the following elements: a volatile memory 304a, in particular a main memory (RAM), a non-volatile memory 304b, in particular flash EEPROM.
• a volatile memory 304a in particular a main memory (RAM)
• a non-volatile memory 304b in particular flash EEPROM.
• the computing device 300 can have an optional, preferably bidirectional, data interface 306 for receiving the data carrier signal DS.
• the computing device 300 can, by means of the optional data interface 306, for example also receive input signals BD that can be used for its operation, for example from the exhaust gas probe 15 and / or the control unit 100 and / or output signals, for example control data SD for operating the exhaust gas probe 15 and / or of the control unit 100 to the control unit 100 and / or the exhaust gas probe 15.
• the computing device 300 has an analog-to-digital converter, ADC, 305 and at least temporarily at least one analog signal a2 of the exhaust gas probe 15 and / or one derived from the analog signal a2 of the exhaust gas probe 15 by means of the control unit 100 Analog signal a2 digitized.
• the ADC 305 can with further preferred embodiments can also be part of the data interface 306, for example.
• the reception of the analog signal a2 from the exhaust gas probe 15 or the control unit 100 is shown in step 210a from FIG. 5B, and the digitization by means of the ADC 305 (FIG. 2) in step 211 from FIG. 5B.
• the digitized data obtained in this way can be used for the sequence control 200, in particular also for regulating an operation of the exhaust gas probe 15 or the control unit 100, in particular by the computing device 300.
• FIG. 3 schematically shows a simplified block diagram according to further preferred embodiments.
• a sequence controller 303 in particular a complete sequence controller, is implemented for the operation of the exhaust gas probe 15 by means of the control unit 100a.
• the sequence controller 303 sends control data A, B, C (analogous to the control data SD according to FIG. 5A) to the control unit 100a via the preferably bidirectional data connection DV (cf. also element 306 according to FIG. 2).
• MUX multiplexer
• DAC digital-to-analog converter
• Reference numeral 102 symbolizes an electrical connection of the control unit 100a to the exhaust gas probe 15 (FIG. 1). Exemplary details for the electrical connection 102 of the control unit 100a to the exhaust gas probe 15 can be found, for example, in a data sheet of the "CJ135" control module sold by the applicant.
• Operating data BD which can be determined by means of the control unit 100a are preferably transmitted from the control unit 100a to the computing device 300a via the data connection DV.
• the operating data BD can include, for example: analog measured values D, E, see also reference symbol a2 (see also FIG. 2).
• the computing device 300a carries out a comparatively large proportion of the sequence control required for the operation of the exhaust gas probe 15 off, preferably under the control of the corresponding computer program PRG1 (Fig. 2).
• the entire sequence control can also be implemented via the sequencer 303 of the computing device 300a, which, for example, takes on the tasks of both a high-level sequencer and a low-level sequencer.
• This variant can be used, for example, if the computing device 300a has an ADC 305 so that the ADC 305 can be controlled directly, in particular without transmission between control unit 100a and computing device 300a, e.g. by computing unit 302 (Fig. 2) of computing device 300a.
• a switch structure 106 that may be present in the control unit 100a can also advantageously be used for switching over the ADC inputs and, for example, implemented via the MUX switch 106. In this way, for example, different analog signals a2 of the exhaust gas probe 15 can be switched to an input of the ADC 305 in time-division multiplex mode.
• FIG. 4 schematically shows a simplified block diagram according to further preferred embodiments.
• the computing device 300b at least partially realizes a primary sequential control 303a for operating the exhaust gas probe 15, with a secondary sequential control 103 being provided in particular in the control unit 100b, which is controlled by the primary sequential control 303a of the computing device 303a is controlled.
• the sequence control for the operation of the exhaust gas probe 15 can advantageously be distributed to the computing device 300b and the control unit 100b, whereby, for example, those parts of the sequence control for operating the exhaust gas probe 15 which are to be easily changeable by means of the computing device 300b , for example in the form of the computer program PRG1, PRG2 (FIG.
• control unit 100b which is designed, for example, as an ASIC.
• the sequence control for the operation of the exhaust gas probe can, as already mentioned, also be referred to as a "sequencer” or “sequencer”, whereby according to further preferred embodiments a high-level sequencer, for example in the form of the primary sequence control 303a described above by way of example, is implemented by means of the computing device 300b, and wherein, according to further preferred embodiments, a low-level sequencer, for example in the form of the secondary sequence control 103 described above by way of example, is implemented by means of the control unit 100b (eg ASIC).
• a high-level sequencer for example in the form of the primary sequence control 303a described above by way of example
• a low-level sequencer for example in the form of the secondary sequence control 103 described above by way of example
• the control unit 100b eg ASIC
• the sequence controller 200 (FIG. 5A), 303 (FIG. 3) and / or the primary sequence controller 303a (FIG. 4) at least temporarily controls at least one of the following processes: a) Determination of time intervals of measurements, b) transmission of default values for switch positions to the control unit, c) transmission of measured values, in particular those which can be determined by means of the control unit, to the computing device, d) identification and / or plausibility check of measured values received by the control unit, in particular with respect to a respective expected measured value , e) retrieval of status information, in particular error information, from the control unit, f) activation ("triggering") of a pump current regulator of the control unit, in particular after receiving a new Nernst voltage measured value, g) setting switches of the control unit, in particular so that no short circuits and / or power interruptions occur, h) start measuring ngen by means of an or the analog-digital converter, in particular synchronously with
• the above-mentioned processes a) to f) can be executed by means of the primary process control 303a (FIG. 4) (high-level sequencer), and that in particular the above-mentioned processes g) to I) by means of the secondary Sequence control 103 (low-level sequencer) can be executed.
• a definition of measurements via switch positions, timings and current sources can be carried out within the computer program PRG1 of the computing device 300b in the high level sequencer 303a.
• a timed switching of the switches 107, current sources and control of the ADC 104b for individual measurements takes place, for example, within the low-level sequencer 103, which is located in the control unit 100b, which is preferably designed as an ASIC.
• the low-level sequencer 103 is synchronized with the high-level sequencer 303a by means of a reference signal that can be provided by the computing device 300b or its high-level sequencer 303a (e.g., which can be transmitted via the data connection DV, FIG. 3).
• the high-level sequencer 303a is synchronized with a reference signal from the computing device 300b, e.g. with a chip select ("CS") signal from the computing device 300b or its computing unit 302.
• CS chip select
• control data SD according to FIG. 4 correspond, for example, to measurements or control information for measurements to be carried out by means of the ADC 104b of the control unit 100b, including switch positions for the switching structure 107 and energizations for the DAC 104a of the control unit 100b.
• operating data BD according to FIG. 4 correspond, for example, to measured values D, E and status information F.
• the switching structure 107 can, for example, have several switches that can be switched independently of one another.
• FIG. 6 Receiving 400 of control data SD for operating the control unit 100 , 100a, 100b and / or the exhaust gas probe 15 from a computing device 300, 300a, 300b, the computing device 300, 300a, 300b being designed in particular according to the embodiments, sending 410 (FIG. 6) of the operation of the control unit and / or the Operating data BD characterizing the exhaust gas probe to the computing device 300, 300a,
• control unit 100b at least partially implements a sequence controller 103 for operating the exhaust gas probe 15, the sequence controller 103 (e.g. low-level sequencer) of the control unit 100b at least temporarily controls one of the following processes: G) setting switches 107 of control unit 100b, in particular so that no short circuits and / or power interruptions occur, H) starting measurements by means of an analog-to-digital converter 104b, preferably integrated into control unit 100b, in particular synchronously with a reference signal or reference clock (which can be specified, for example, via the data connection DV (FIG. 3) by the computing device 300b (FIG.
• the principle according to preferred embodiments provides a greatly increased flexibility compared to conventional approaches, in particular with regard to the definition of the measurement sequence.
• the sequence control 200 defines, for example, the setting of current sources, the switching of switches 107 and thus the operating sequence of the current sources and measurements.
• the principle according to the preferred embodiments makes it possible, by changing the software PRG1, PRG2, to flexibly adapt, for example, different measurement sequences and / or currents to the respective system requirements, in particular without changing the control unit 100, 100a, 100b, which is preferably designed as an ASIC.
• microcontroller resources in particular the arithmetic unit 300 are used for calculations and / or the triggering of the measurements, e) with direct transmission of the measured values no memory requirement is necessary in the ASIC 100, 100a, 100b, f) simpler ones

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)

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• 2019
  • 2019-09-04 DE DE102019213411.4A patent/DE102019213411A1/de active Pending
• 2020
  • 2020-07-23 WO PCT/EP2020/070760 patent/WO2021043500A1/de unknown
  • 2020-07-23 JP JP2022514632A patent/JP2022547486A/ja active Pending
  • 2020-07-23 KR KR1020227010036A patent/KR20220054636A/ko unknown
  • 2020-07-23 CN CN202080062320.3A patent/CN114341470A/zh active Pending
  • 2020-07-23 US US17/637,852 patent/US20220290626A1/en active Pending
  • 2020-07-23 EP EP20746927.1A patent/EP4026010A1/de active Pending

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