EP0367973A1 - Procédé de détection et d'exploitation de la vitesse de rotation d'un moteur à combustion à plusieurs cylindres - Google Patents

Procédé de détection et d'exploitation de la vitesse de rotation d'un moteur à combustion à plusieurs cylindres Download PDF

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Publication number
EP0367973A1
EP0367973A1 EP89118008A EP89118008A EP0367973A1 EP 0367973 A1 EP0367973 A1 EP 0367973A1 EP 89118008 A EP89118008 A EP 89118008A EP 89118008 A EP89118008 A EP 89118008A EP 0367973 A1 EP0367973 A1 EP 0367973A1
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EP
European Patent Office
Prior art keywords
teeth
measurement results
internal combustion
combustion engine
work cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP89118008A
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German (de)
English (en)
Other versions
EP0367973B1 (fr
Inventor
Christoph Burckhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
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Daimler Benz AG
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Publication date
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Priority to AT89118008T priority Critical patent/ATE70896T1/de
Publication of EP0367973A1 publication Critical patent/EP0367973A1/fr
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Publication of EP0367973B1 publication Critical patent/EP0367973B1/fr
Anticipated expiration legal-status Critical
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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
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals

Definitions

  • the invention relates to a method for detecting and evaluating the speed in multi-cylinder internal combustion engines according to the preamble of claim 1.
  • DE-OS 32 21 640 describes a method and a device for controlling an internal combustion engine.
  • a controlled variable of an internal combustion engine is continuously changed by a calculated value by enlarging and reducing it by a certain amount.
  • the internal combustion engine is operated with this changing control variable and the effects of the change in the control variable on the operation of the internal combustion engine are carried out repeated acquisition and evaluation of the speed observed. Based on this evaluation, the controlled variable is changed in the direction of an optimal value.
  • the detection and evaluation of the speed takes place in such a way that the speed of the internal combustion engine is determined in several counting periods in each of a predetermined operating period, the corresponding speed values are compared with one another within each operating period and the result of the comparison for determining a direction of change of the controlled variable for a subsequent operating period is used.
  • the duration of such an operating period, within which the speed difference is evaluated, as well as the counting period itself, extends over a number of ignition processes, so that with this method, speed change tendencies or acceleration values cannot be determined several times per engine revolution and therefore no time-critical control tasks, such as For example, anti-jerk control can be carried out.
  • Another disadvantage of this method is that no statements can be made with regard to the rotational irregularities of the internal combustion engine caused by certain individual cylinders.
  • the object of the invention is to develop a method of the generic type which allows the speed evaluation to be used for different control purposes while avoiding the disadvantages mentioned above.
  • one work cycle is divided into several equally large intervals.
  • the rotary movement of the internal combustion engine is detected by suitable sensors and the times required for each of the predetermined intervals of the working cycle are measured. These measured values within each work cycle are stored in the order of their determination in successive memory register cells of a control device.
  • the times required for the individual intervals of the new work cycle are measured again.
  • the next method step then compares the corresponding measured times of the last work cycle with the values of the previous work cycle located in the memory register cells and, after subtraction has been carried out, replaces the stored values with the respectively newly obtained values, e.g. by overwriting the memory register contents.
  • the comparison values obtained in this way can then be used for control purposes for the internal combustion engine.
  • FIG. 1 shows a schematic diagram of a device according to the invention with an internal combustion engine 1 and an associated injection pump 2.
  • a ring gear coupled to the output shaft of the internal combustion engine 1, for example a starter gear 3, makes it possible to detect the speed of the internal combustion engine 1 with the aid of a suitable sensor 4, which can be, for example, an inductive sensor, and to the control unit 5, in which the measured Speed values are saved to pass on.
  • the control unit 5 also carries out an evaluation of the speed values by means of algorithms and comparison operations and forwards the results of this evaluation to a unit 6 for controlling corresponding actuators on the internal combustion engine 1, such as the injection pump 2.
  • the functional diagram shown in FIG. 2 shows a speed sensor 4, which detects the speed of a device coupled to the output shaft of an internal combustion engine, such as a starter gear.
  • the signal curve of the inductive sensor 4, for example, shown in this block is converted in a pulse shaper 7 to the signal curve shown there. After they have been divided in a frequency divider 8, the pulses from the pulse shaper 7 control a gate circuit 9, by means of which the counting pulses generated in a generator 10 reach a counter 11.
  • the length of the counting intervals, ie the number of teeth of the starter gear that pass the sensor 4 during an interval, is chosen so that the ratio of the number k of these teeth is an integer divisor of the total number of teeth i of the starter gear.
  • This ratio i / k forms the divider ratio of the frequency divider 8.
  • a work cycle of the internal combustion engine - corresponding to two crankshaft revolutions in a four-stroke internal combustion engine - is divided into individual, equally large intervals during which the counting pulses from the generator 10 to the counter 11 arrive.
  • the counter reading of the counter 11 is a measure of the rotational speed of the starter gear and thus also of the internal combustion engine. It is inversely proportional to the speed of rotation of the internal combustion engine.
  • the read-in distributor 13 gives all the measurement results of an interval one after the other to one of the successive memory register cells R 1, ..., R n of a memory register 15.
  • the measurement result of the first interval is therefore stored in the register cell R 1, that of the second interval in R 2, etc.
  • n 2i / k memory register cells, where i is the total number of teeth of the starter gear and k is the number of teeth of the starter gear, which Set counting interval, mean.
  • the individual measurement results of the intervals of the current work cycle are compared with the corresponding measurement results of the previous work cycle read out from the register 15 via a read distributor 16 coupled to the read distributor 13 with the aid of the subtractor 14 compared and evaluated for control purposes on the internal combustion engine.
  • the measurement result of each interval of the current work cycle controlled by the shift register 12, is passed to the memory register 15 and overwrites the value of the previous interval there until the results of the entire current work cycle are stored in the register 15.
  • This method is then continued periodically for each further work cycle, so that each interval of a previous work cycle is always compared with the corresponding interval of the subsequent work cycle. From this comparison, knowledge about the rotational irregularity of the internal combustion engine can be obtained, which are then evaluated for control purposes.
  • each measurement result can be unambiguously assigned to a specific cylinder or even a specific work cycle of a cylinder and - again by comparing the corresponding measurement results from successive work cycles - irregularities in the operating behavior of an individual cylinder, for example due to loss of compression, can be recognized and for control purposes, eg by means of multiple injection.
  • the mean 17 is used to form the mean value from the measurement results of all intervals of a work cycle and this mean value a is stored for a certain number m of work cycles in individual memory register cells R al ,... R on a shift register.
  • the low-pass filter 18 determines a weighted averaged speed from the memory contents of the register cells R a multiplied by the register-related weighting factor n the internal combustion engine, and in a differentiator 19, the first time derivative d n / dt this average speed.
  • the characteristic for the signal of the average speed n can, for example, have the course shown in FIG. 4 and the characteristic curve for the signal of the derivative d n / dt, for example, the course shown in Figure 5.
  • the output variables determined from the characteristic curves n v or d n v / dt arrive at a summing point 22 and from there to a comparator or subtractor 23, which uses this signal and the results described above to compare the rotational speeds of the individual corresponding intervals that come from the subtractor 14 in the output stage 24 for control purposes generated manipulated variables of the internal combustion engine.
  • FIG. 3 shows a modification of the functional diagram according to FIG. 2, parts which match are provided with the same reference numerals as in FIG. 2.
  • the average speed n and the derivative d determined therefrom are shown in n / dt not obtained from the averaged interval measured values a, but the speed pulses go directly from the pulse shaper 7 via a further gate circuit 25 and a separate counter 26 to the low-pass filter 18, where they are processed to the required values.
  • the acquisition and evaluation of the measurement results of certain intervals of the periodically recurring work cycles can be suspended in a simple manner, thereby computing time for other tasks, such as for diagnostic purposes or for obtaining of transmission time for serial interfaces.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
EP89118008A 1988-10-14 1989-09-28 Procédé de détection et d'exploitation de la vitesse de rotation d'un moteur à combustion à plusieurs cylindres Expired - Lifetime EP0367973B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118008T ATE70896T1 (de) 1988-10-14 1989-09-28 Verfahren zur erfassung und auswertung der drehzahl bei mehrzylinder-brennkraftmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835002 1988-10-14
DE3835002A DE3835002C3 (de) 1988-10-14 1988-10-14 Verfahren zur Erfassung und Auswertung der Drehzahl bei Mehrzylinder-Brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0367973A1 true EP0367973A1 (fr) 1990-05-16
EP0367973B1 EP0367973B1 (fr) 1991-12-27

Family

ID=6365107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118008A Expired - Lifetime EP0367973B1 (fr) 1988-10-14 1989-09-28 Procédé de détection et d'exploitation de la vitesse de rotation d'un moteur à combustion à plusieurs cylindres

Country Status (3)

Country Link
EP (1) EP0367973B1 (fr)
AT (1) ATE70896T1 (fr)
DE (2) DE3835002C3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266975A (en) * 1992-05-12 1993-11-17 Bosch Gmbh Robert Fuel metering control
EP1107008A2 (fr) * 1999-12-10 2001-06-13 Robert Bosch Gmbh Méthode et dispositif pour la suppression des fluctuations de vitesses de rotation
DE10143953A1 (de) * 2001-09-07 2003-04-03 Siemens Ag Drehzahlerfassungsverfahren
DE10218641A1 (de) * 2002-04-25 2003-11-13 Bayerische Motoren Werke Ag Motordrehzahl-Bestimmung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319677C2 (de) * 1993-06-14 2002-08-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Regelung der Laufruhe einer Brennkraftmaschine
DE102019201149A1 (de) * 2019-01-30 2020-07-30 Robert Bosch Gmbh Verfahren zum Diagnostizieren einer Leckage eines Zylinders einer Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590907A (en) * 1984-03-02 1986-05-27 Toyota Jidosha Kabushiki Kaisha Method of adaptively controlling individual cylinder fuel injection quantities in electronically controlled diesel engine and device therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064747A (en) * 1976-05-07 1977-12-27 United Technologies Corporation Relative and sub-cyclic speed measurements for internal combustion engine diagnostics
DE2918802C2 (de) * 1979-05-10 1992-02-27 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur Gewinnung eines Beschleunigungs- oder Verzögerungssignals aus einem einer Geschwindigkeit proportionalen Signal
JPS57203846A (en) * 1981-06-08 1982-12-14 Nippon Denso Co Ltd Most optimum control device for internal-combustion engine
JPS59141750A (ja) * 1983-01-19 1984-08-14 Diesel Kiki Co Ltd 内燃機関用回転速度デ−タ発生装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590907A (en) * 1984-03-02 1986-05-27 Toyota Jidosha Kabushiki Kaisha Method of adaptively controlling individual cylinder fuel injection quantities in electronically controlled diesel engine and device therefor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 163 (M-487)[2219], 11. Juni 1986; & JP-A-61 14 446 (NIPPON DENSO) 22-02-1986 *
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 191 (M-402)[1914], 7. August 1985; & JP-A-60 56 145 (ISUZU) 01-04-1985 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266975A (en) * 1992-05-12 1993-11-17 Bosch Gmbh Robert Fuel metering control
US5386810A (en) * 1992-05-12 1995-02-07 Robert Bosch Gmbh System and method for controlling a solenoid-valve-controlled fuel-metering device, particularly for a diesel gasoline engine
GB2266975B (en) * 1992-05-12 1995-11-01 Bosch Gmbh Robert Fuel metering control
DE4215581B4 (de) * 1992-05-12 2004-05-06 Robert Bosch Gmbh System zur Steuerung einer magnetventilgesteuerten Kraftstoffzumeßeinrichtung
EP1107008A2 (fr) * 1999-12-10 2001-06-13 Robert Bosch Gmbh Méthode et dispositif pour la suppression des fluctuations de vitesses de rotation
EP1107008A3 (fr) * 1999-12-10 2004-04-07 Robert Bosch Gmbh Méthode et dispositif pour la suppression des fluctuations de vitesses de rotation
DE10143953A1 (de) * 2001-09-07 2003-04-03 Siemens Ag Drehzahlerfassungsverfahren
DE10143953B4 (de) * 2001-09-07 2005-12-29 Siemens Ag Drehzahlerfassungsverfahren
DE10218641A1 (de) * 2002-04-25 2003-11-13 Bayerische Motoren Werke Ag Motordrehzahl-Bestimmung
DE10218641B4 (de) * 2002-04-25 2006-11-30 Bayerische Motoren Werke Ag Motordrehzahl-Bestimmung

Also Published As

Publication number Publication date
DE3835002C3 (de) 1994-02-24
DE3835002A1 (de) 1990-04-19
ATE70896T1 (de) 1992-01-15
DE58900633D1 (de) 1992-02-06
DE3835002C2 (fr) 1991-05-08
EP0367973B1 (fr) 1991-12-27

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