EP1177373A2 - Verfahren zur eingangssignalkorrektur und zur zylindergleichstellung an einem verbrennungsmotor - Google Patents
Verfahren zur eingangssignalkorrektur und zur zylindergleichstellung an einem verbrennungsmotorInfo
- Publication number
- EP1177373A2 EP1177373A2 EP01911332A EP01911332A EP1177373A2 EP 1177373 A2 EP1177373 A2 EP 1177373A2 EP 01911332 A EP01911332 A EP 01911332A EP 01911332 A EP01911332 A EP 01911332A EP 1177373 A2 EP1177373 A2 EP 1177373A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- input signal
- control
- signal correction
- correction
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 230000006978 adaptation Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 230000004913 activation Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 208000001431 Psychomotor Agitation Diseases 0.000 description 1
- 206010038743 Restlessness Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
- F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1015—Engines misfires
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
Definitions
- the invention relates to a method for input signal correction of a misfire detection function and for cylinder equalization on an internal combustion engine, in particular of a vehicle, in accordance with the introductory part of claim 1.
- Methods for misfire detection by determining uneven running, possibly taking into account filtered uneven running values are known.
- Methods for improving the quality of misfire detection for example by means of sensor wheel adaptations or general adaptations, also belong to the prior art.
- Such an optimization of misfire detection is known under the name "fuel-on-adaptation”.
- the fuel-on adaptation is based on rough running values or segment times of the internal combustion engine and learns sensor wheel errors and torque differences between the individual cylinders during operation of the internal combustion engine. When learning the encoder wheel errors and the torque differences, the fuel-on-adaptation values are formed with which the current segment times or the rough running values are corrected. Only the input signals of a misfire detection function are changed.
- a correction by means of the fuel-on adaptation has no repercussions on the internal combustion engine, as can be done, for example, in the form of a torque correction by a suitably increased injection quantity of fuel.
- cylinder equalization In petrol direct injection systems, cylinder equalization is used to compensate for the torque differences between individual cylinders during the operation of an internal combustion engine. Such torque differences between the individual cylinders can occur, for example, due to the existing sample scatter of injection valves (manufacturing inaccuracies that cannot be avoided) or in the case of valve coking.
- a control system for cylinder equalization determines the torque deviations under the individual cylinders on the basis of rough running values during the operation of the internal combustion engine.
- the cylinder torques are preferably assimilated in a shift operation by adapting the cylinder-specific injection quantity of fuel in the form of a dynamic control.
- the cylinder equalization is used for the cylinder-specific correction of the injection times as a function of the cylinder torques which occur, the corrected injection times in turn influencing the cylinder torque. There is therefore a reaction of the injection times to the cylinder torque, so that torque differences under the cylinders can be regulated to the value zero by means of the control for cylinder equalization.
- the method according to the invention is characterized in that a control system for input signal correction and a control system for cylinder alignment are alternatively activated. This ensures that the activated control for input signal correction (fuel-on-adaptation) is not adversely affected by simultaneous activation of the control for cylinder equalization.
- a fault in the control system for fuel-on-adaptation can be attributed in particular to the fact that the input signals for misfire detection functions are also corrected on the basis of the cylinder torques, which in turn are corrected by means of cylinder equalization.
- the cylinder equalization thus influences the fuel-on adaptation by compensating for torque differences between individual cylinders by means of cylinder-specific correction of the injection times, since the latter corrects the input signals of misfire detection functions on the basis of the cylinder torques, among other things.
- the controller for input signal correction and the controller for cylinder Equalization ensures reliable misfire detection and at the same time effective cylinder equalization during the operation of the internal combustion engine, since the control for fuel-on-adaptation can only be activated at a time when the control for cylinder equalization is not activated, and vice versa.
- a cylinder torque correction which is set for cylinder equation is advantageously taken into account by the activated input signal correction control. Due to the alternative activation of the two controls, when the input signal correction control is activated, detection and consideration of a cylinder torque correction, which was initiated by the previously activated cylinder equalization control for cylinder equalization, is reliably ensured.
- the cylinder torque correction values are included in corresponding input signal correction values by the input signal correction controller.
- the input signal correction controller By means of a direct and timely calculation of the cylinder torque correction values with the input signal correction values, a continuously adapted input signal correction is obtained during the activation of the corresponding control.
- the respective cylinder torque correction value is kept constant with the input signal correction control activated until the difference between one predetermined target value and an actual value of the cylinder torque correction exceeds a definable threshold value, whereupon a new constant actual value is set to the predetermined target value and the input signal correction control is reset.
- the cylinder torque value of the worst cylinder is used for the actual value, the setpoint being set as a new constant actual value for all cylinders. Due to the reset of the input signal correction control (fuel-on-adaptation), it is reset to neutral start values. Thus, the fuel-on adaptation starts learning from neutral starting values. After resetting the fuel-on adaptation, the thresholds of misfire detection are increased and only lowered again after advanced fuel-on adaptation.
- the cylinder equalization control adjusts the injection time at least for the following combustion, depending on the cylinder torque that occurs after a combustion. In this way, a reliable and effective cylinder synchronization is carried out during the operation of the internal combustion engine.
- the input correction advantageously forms cylinder-specific correction values for setting input signals of at least one misfire detection function, depending on the degree of restlessness and / or the segment time. This reliably improves the quality of the combustion Setter recognition improved or optimized.
- the input signal correction control and the cylinder equalization control are preferably activated by means of an alternative circuit unit.
- An alternative circuit unit allows an alternative activation of the control for input signal correction and the control for cylinder equalization in a reliable, fast and automatic manner.
- FIG. 1 shows as a single figure a block diagram for misfire detection and cylinder equation on a cylinder of an internal combustion engine.
- an input signal correction controller 10 and a cylinder equalization controller 11 are shown, which are operatively connected to a cylinder 14 of an internal combustion engine (not shown).
- An alternative circuit unit 12 is connected to the input signal correction by means of corresponding control lines and shown as double arrows 17, 18.
- Control 10 and the cylinder equalization control 11 are operatively connected that either control 10 or control 11 can be activated, but not both controls 10, 11 at the same time.
- the cylinder equalization control 11 is operatively connected to an injection timing control unit 13 by means of a control line shown as arrow 20, which in turn can adjust the injection time at least for the next combustion in the cylinder 14 or can adapt it to the respective operating situation of the internal combustion engine by means of a control line shown as arrow 22.
- a data transmission line shown as arrow 23 leads from the cylinder 14 to a torque detection unit 15, which is connected to the cylinder equalization control 11 by means of the data transmission line shown as arrow 25.
- the injection control unit 13, the cylinder 14 and the torque detection unit 15 are thus operatively connected to the cylinder equalization control 11 by means of the lines 20, 22, 23 and 25 as a closed control loop.
- the input signal correction controller 10 which is also referred to as "fuel-on-adaptation" is connected by means of a data transmission line shown as arrow 19 to a misfire detection function unit 16, which in turn is in operative contact with the cylinder 14 by means of a connection shown as arrow 21 ,
- a misfire detection function unit 16 which in turn is in operative contact with the cylinder 14 by means of a connection shown as arrow 21 .
- One of the torque detection unit 15 and the cylinder 14 each lead as an arrow 24, 26 Data transmission line shown for input signal correction controller 10.
- FIG. 1 For reasons of clarity, only a single cylinder 14 of an internal combustion engine is shown schematically in FIG. However, the internal combustion engine (not shown) normally has a plurality of cylinders, each of which is in operative operative contact with the input signal correction controller 10 and the cylinder equalization controller 11 according to FIG. 1. The schematic illustration corresponding to FIG. 1 can thus also be transferred to all further cylinders of an internal combustion engine, not shown.
- the control for the input signal correction 10 and the control for the cylinder equalization 11 are activated alternatively.
- the cylinder equalization 11 adjusts the injection time at least for the following combustion in the cylinder 14 by means of the injection timing control unit 13 depending on the cylinder torque that occurs in each case after a combustion.
- the input signal correction controller 10 forms, depending on the degree of uneven running and / or the segment time, cylinder-specific, corresponding data being transmitted to the input signal correction controller 10 by means of the data transmission lines according to the arrows 24, 26, correction values for setting input signals for the misfire detection functional unit 16. Both the input signal correction controller 10 and the cylinder equalization controller 11 are thus connected by means of data transmission lines.
- the cylinder equalization control 11 corrects the cylinder-specific injection times on the basis of the cylinder torques, which in turn exert an influence on the cylinder torques of the subsequent combustion. Due to the control circuit, the cylinder equalization control 11 is suitable for regulating any torque differences that may occur between the individual cylinders of the internal combustion engine to the value zero.
- the input signal correction controller 10 also takes into account the respective values of the cylinder torques, which are transmitted from the torque detection unit 15 to the torque transmission unit 15 by means of the data transmission line shown as arrow 24, the segment time for forming input signal correction values being able to be taken into account in addition or as an alternative.
- the cylinder torque correction values can be directly calculated into corresponding input signal correction values by the input signal correction controller 10, provided the controller 10 is activated.
- the respective Cylinder torque correction value with activated input signal correction controller 10 is also kept constant until the difference between a predetermined target value and an actual value of the cylinder torque correction exceeds a definable threshold value, whereupon a new constant actual value is set to the predetermined target value and the input signal correction controller 10 is reset.
- the input signal correction controller 10 and the cylinder equalization controller 11 are known per se with regard to their functional and structural design and are therefore not described in further detail here.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10000871A DE10000871A1 (de) | 2000-01-12 | 2000-01-12 | Verfahren zur Eingangssignalkorrektur und zur Zylindergleichstellung an einem Verbrennungsmotor |
| DE10000871 | 2000-01-12 | ||
| PCT/DE2001/000011 WO2001051793A2 (de) | 2000-01-12 | 2001-01-04 | Verfahren zur eingangssignalkorrektur und zur zylindergleichstellung an einem verbrennungsmotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1177373A2 true EP1177373A2 (de) | 2002-02-06 |
| EP1177373B1 EP1177373B1 (de) | 2004-09-01 |
Family
ID=7627209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01911332A Expired - Lifetime EP1177373B1 (de) | 2000-01-12 | 2001-01-04 | Verfahren zur eingangssignalkorrektur und zur zylindergleichstellung an einem verbrennungsmotor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6619260B2 (de) |
| EP (1) | EP1177373B1 (de) |
| JP (1) | JP2003531327A (de) |
| BR (1) | BR0103935A (de) |
| DE (2) | DE10000871A1 (de) |
| WO (1) | WO2001051793A2 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10339251B4 (de) * | 2003-08-26 | 2015-06-25 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
| US9523322B2 (en) | 2012-12-14 | 2016-12-20 | Continental Automotive Systems, Inc. | Method to reduce engine combustion and harmonic noise for misfire detection |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0472449A (ja) | 1990-07-10 | 1992-03-06 | Fuji Heavy Ind Ltd | エンジンの失火診断装置 |
| US5307670A (en) * | 1990-11-01 | 1994-05-03 | Fuji Jukogyo Kabushiki Kaisha | Misfire discriminating method for an engine |
| US5337716A (en) * | 1992-02-04 | 1994-08-16 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for internal combustion engine |
| JP3357091B2 (ja) * | 1992-07-21 | 2002-12-16 | 富士重工業株式会社 | エンジンの失火検出方法 |
| DE59205028D1 (de) * | 1992-08-14 | 1996-02-22 | Siemens Ag | Verfahren zur Erkennung und Korrektur von Fehlern bei der Zeitmessung an sich drehenden Wellen |
| JP3186250B2 (ja) | 1992-10-06 | 2001-07-11 | 株式会社デンソー | 内燃機関の空燃比制御装置 |
| JPH08338299A (ja) * | 1995-06-10 | 1996-12-24 | Robert Bosch Gmbh | ミスファイア検出方法 |
| JP3325162B2 (ja) * | 1995-09-04 | 2002-09-17 | 株式会社日立製作所 | 内燃機関の燃焼状態検出装置 |
| DE19720009C2 (de) * | 1997-05-13 | 2000-08-31 | Siemens Ag | Verfahren zur Zylindergleichstellung bezüglich der Kraftstoff-Einspritzmenge bei einer Brennkraftmaschine |
| DE19725233B4 (de) * | 1997-06-14 | 2005-03-24 | Volkswagen Ag | Verfahren zur Anpassung der Einspritzmenge einer Brennkraftmaschine zur Laufruheregelung |
| DE19814732B4 (de) * | 1998-04-02 | 2013-02-28 | Robert Bosch Gmbh | Drehzahlerfassungsverfahren, insbesondere zur Verbrennungsaussetzererkennung |
| DE19828279A1 (de) * | 1998-06-25 | 1999-12-30 | Bosch Gmbh Robert | Gleichstellung der zylinderindividuellen Drehmomentenbeiträge beim mehrzylindrigen Verbrennungsmotor |
| DE19859074A1 (de) * | 1998-12-21 | 2000-06-29 | Bosch Gmbh Robert | Verfahren zur Regelung der Laufruhe eines Verbrennungsmotors |
| DE10001274C2 (de) * | 2000-01-14 | 2003-02-06 | Bosch Gmbh Robert | Verfahren zur Verbrennungsaussetzererkennung und Zylindergleichstellung bei Verbrennungsmotoren mit Klopfregelung |
| DE10010459C1 (de) * | 2000-03-03 | 2002-04-04 | Bosch Gmbh Robert | Verfahren zur Aussetzererkennung bei Verbrennungsmotoren |
-
2000
- 2000-01-12 DE DE10000871A patent/DE10000871A1/de not_active Ceased
-
2001
- 2001-01-04 JP JP2001551972A patent/JP2003531327A/ja not_active Abandoned
- 2001-01-04 US US09/936,417 patent/US6619260B2/en not_active Expired - Fee Related
- 2001-01-04 BR BR0103935-0A patent/BR0103935A/pt not_active IP Right Cessation
- 2001-01-04 EP EP01911332A patent/EP1177373B1/de not_active Expired - Lifetime
- 2001-01-04 WO PCT/DE2001/000011 patent/WO2001051793A2/de not_active Ceased
- 2001-01-04 DE DE50103457T patent/DE50103457D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0151793A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20020157642A1 (en) | 2002-10-31 |
| WO2001051793A3 (de) | 2001-11-29 |
| EP1177373B1 (de) | 2004-09-01 |
| US6619260B2 (en) | 2003-09-16 |
| WO2001051793A2 (de) | 2001-07-19 |
| JP2003531327A (ja) | 2003-10-21 |
| DE50103457D1 (de) | 2004-10-07 |
| BR0103935A (pt) | 2001-12-26 |
| DE10000871A1 (de) | 2001-08-02 |
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