EP0676008A1 - Method for cylinder identification in an internal combustion engine when idling. - Google Patents
Method for cylinder identification in an internal combustion engine when idling.Info
- Publication number
- EP0676008A1 EP0676008A1 EP94900734A EP94900734A EP0676008A1 EP 0676008 A1 EP0676008 A1 EP 0676008A1 EP 94900734 A EP94900734 A EP 94900734A EP 94900734 A EP94900734 A EP 94900734A EP 0676008 A1 EP0676008 A1 EP 0676008A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- cylinder
- crankshaft
- assigned
- angle
- 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 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000002950 deficient Effects 0.000 abstract 1
- 230000001788 irregular Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/008—Reserve ignition systems; Redundancy of some ignition devices
Definitions
- the invention relates to a method for cylinder detection for internal combustion engines according to the preamble of the main claim. It is already known from DE-OS 34 31 232 to provide two sensor wheels for cylinder detection, ie for detecting the compression in a cylinder, for example cylinder of the engine during a working cycle, of which the first sensor wheel with crankshaft speed and the second sensor wheel with half the crankshaft speed, i.e. at the speed of the camshaft.
- a synchronization of the signals that are generated in the sensors assigned to the sensor wheels enables the clock to be recognized precisely, since the engine is located during the combustion cycle.
- the failure of the sensor for detecting the camshaft revolution means that an exact position of the piston of a cylinder during a combustion cycle can no longer be recognized due to the missing phase signal.
- the method according to the invention with the characterizing features of the independent claims has the advantage that a cylinder detection is possible even without a phase signal. Another advantage is that cylinder-specific controls, such as cylinder-selective injection or cylinder-selective knock control, can also be continued in the event of a phase sensor error. Ultimately, it is advantageous that safety measures for emergency operation, such as later ignition angle and mixture enrichment, can be omitted or can be terminated again after a short time.
- FIG. 1 shows the relationship between camshaft and crankshaft signals on the basis of signal profiles
- FIG. 2 shows a structogram for carrying out the method according to claim 1
- FIG. 3 shows a structogram for carrying out the method according to claim 3.
- the signal curves from the camshaft sensor NW and from the crankshaft sensor KW in a multi-cylinder internal combustion engine, as detected by a control unit and normal operating conditions, are shown as the first and second signal curves.
- 1 shows the ignition control signal 1 output by the control unit on a first cylinder ZI. All three waveforms NW, KW and the ignition control signal 1 are shown via the crankshaft angle, with the range from 0 ° to 720 ° (i.e.
- crankshaft revolutions (to be explained in more detail) in particular) .
- the crankshaft of a four-stroke internal combustion engine rotates during one Combustion cycle twice around its own axis, thus the piston moves twice towards top dead center, once in the compression stroke and secondly in the exhaust stroke.
- the crankshaft is usually connected to a sensor wheel, which for example consists of 60-2 teeth, in order to detect a complete crankshaft revolution.
- the camshaft of an internal combustion engine rotates at half Crankshaft speed so that on two crankshaft revolutions one camshaft revolution is completed.
- FIG. 2 shows a first embodiment of the inventive method of cylinder detection in idle mode.
- the signals supplied by the sensors assigned to the sensor wheels, such as the camshaft signal NW and the crankshaft signal KW, are detected.
- a subsequent query 6 checks whether the phase signal of the camshaft NW was in order.
- safety measures M1, M2 and M3 include, for example, the output of safety ignition angles for knock control, the mixture enrichment and the output of dual ignition, ie an ignition pulse is triggered before each top dead center is reached.
- a work step 9 it is ensured, by detecting the corresponding operating parameters of the internal combustion engine, that the internal combustion engine is operating in a virtually stationary state.
- fixed values for the air pilot control and for the ignition angle are output for the steady state of the idle mode of the internal combustion engine in such a way that the idle speed increases slightly. This is necessary in order to avoid the engine stopping when a load is switched on, eg air conditioning.
- the ignition angle is output so that a change in the ignition angle will have an immediate effect on a change in speed.
- the ignition angle of one of the two ignitions per combustion cycle that is, a double ignition on the cylinder 1, is changed by changing it in the early or late direction.
- An uneven running evaluation is then carried out in a query 12 and checks whether a speed change occured.
- a yes in the query 12 ie a speed change n was determined on the basis of a change in the ignition angle in the early or late direction, leads to a work step 13.
- a speed change n was determined on the basis of a change in the ignition angle in the early or late direction, leads to a work step 13.
- the ignition can thus be assigned to the cylinder 1 and in a work step 14 the safety measures initiated for an emergency operation mode M1, M2 and M3 are deleted again.
- step 12 a no in query 12, ie no speed change could be determined, leads to the control unit recognizing that the ignition output occurred with the ignition angle change in the charge change cycle (exhaust cycle), so that the ignition angle change without Consequence for the speed had to remain.
- Step 16 the safety measures for emergency operation are deleted. Steps 14 and 16 result in a step 17 in which it is checked again whether the phase signal was OK. When transitioning from idling LL to part-load range, the corresponding gap is used as the cylinder assignment, otherwise no additional measures are carried out.
- FIG. 3 is to explain a second exemplary embodiment of the cylinder assignment for idling operation of an internal combustion engine in the event of a missing or faulty phase signal.
- the beginning of this process is identical to the process described in FIG. 2, so that work steps 5 to 11 will not be explained again.
- a step 18 After changing the ignition angle of every second ignition per crankshaft revolution in step 11, it is checked in a step 18 whether the change in ignition angle has counteracted the air pilot value for the idle speed. If this is not the case, that is to say a no to query 18, the changed ignition is assigned to the charge cycle in a subsequent work step 19. In step 20, the ignition signal for the subsequent ignition is thus shifted by 360 ° to the previously changed ignition.
- the safety measures for emergency operation can be deleted in work step 21.
- the security measures M1, M2 and M3 can be deleted.
- the work steps 21 and 23 of this method are connected to a work step 24.
- the ignition or injection is now controlled by the control unit with the determined cylinder assignment until the next control unit reset.
- the process then begins again by jumping to the start of the process in step 24.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4242419A DE4242419A1 (en) | 1992-12-16 | 1992-12-16 | Process for identifying cylinders while the engine is idling |
DE4242419 | 1992-12-16 | ||
PCT/DE1993/001134 WO1994013951A1 (en) | 1992-12-16 | 1993-11-27 | Method for cylinder identification in an internal combustion engine when idling |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0676008A1 true EP0676008A1 (en) | 1995-10-11 |
EP0676008B1 EP0676008B1 (en) | 1996-09-25 |
Family
ID=6475398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94900734A Expired - Lifetime EP0676008B1 (en) | 1992-12-16 | 1993-11-27 | Method for cylinder identification in an internal combustion engine when idling |
Country Status (5)
Country | Link |
---|---|
US (1) | US5572973A (en) |
EP (1) | EP0676008B1 (en) |
JP (1) | JP3442388B2 (en) |
DE (2) | DE4242419A1 (en) |
WO (1) | WO1994013951A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0650600A4 (en) * | 1991-05-02 | 1996-07-03 | Commw Of Australia | Hf background noise measurement in hf environments. |
IT1268605B1 (en) * | 1994-09-30 | 1997-03-06 | Marelli Autronica | SYNCHRONIZATION DEVICE FOR AN ICE ENGINE WITHOUT CAM POSITION SENSOR. |
JP3325151B2 (en) * | 1995-04-06 | 2002-09-17 | 三菱電機株式会社 | Internal combustion engine control device |
JP3325153B2 (en) * | 1995-04-17 | 2002-09-17 | 三菱電機株式会社 | Internal combustion engine control device |
US5729495A (en) * | 1995-09-29 | 1998-03-17 | Altera Corporation | Dynamic nonvolatile memory cell |
DE19652896B4 (en) * | 1996-12-19 | 2004-01-29 | Vogt Electronic Aktiengesellschaft | Device and method for cylinder recognition in an internal combustion engine |
GB2342447A (en) * | 1998-10-03 | 2000-04-12 | Ford Motor Co | Verifying engine cycle of an injection IC engine |
DE19920016A1 (en) * | 1999-05-03 | 2000-11-16 | Bosch Gmbh Robert | Method and device for knock control if the phase generator fails |
DE10111479A1 (en) * | 2001-03-09 | 2002-09-19 | Bosch Gmbh Robert | Procedure for phase detection using ignition timing variation |
US6918382B2 (en) * | 2002-08-26 | 2005-07-19 | Energy Conversion Devices, Inc. | Hydrogen powered scooter |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8322886D0 (en) * | 1983-08-25 | 1983-09-28 | Lucas Ind Plc | Transducer means |
JPS61272470A (en) * | 1985-05-27 | 1986-12-02 | Honda Motor Co Ltd | Ignition timing controlling method for internal-combustion engine |
US5099810A (en) * | 1988-02-27 | 1992-03-31 | Robert Bosch Gmbh | Device for producing control signals in timed relation to the rotation of a shaft |
US5065729A (en) * | 1988-03-18 | 1991-11-19 | Robert Bosch Gmbh | Cylinder recognition apparatus for a distributorless ignition system |
JP2885854B2 (en) * | 1989-06-16 | 1999-04-26 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Distributorless ignition system |
DE3936174A1 (en) * | 1989-10-31 | 1991-05-02 | Bayerische Motoren Werke Ag | CONTACTLESS IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES |
US5213079A (en) * | 1990-01-17 | 1993-05-25 | Mitsubishi Denki K.K. | Ignition timing control apparatus |
JPH03211464A (en) * | 1990-01-17 | 1991-09-17 | Mitsubishi Electric Corp | Tachometer signal generating device |
US5291409A (en) * | 1991-03-27 | 1994-03-01 | General Motors Corp. | Spark timing control system |
US5099811A (en) * | 1991-05-10 | 1992-03-31 | Chrysler Corporation | Method for firing spark plugs |
US5239962A (en) * | 1991-06-19 | 1993-08-31 | Mitsubishi Denki Kabushiki Kaisha | Engine control apparatus for a multi-cylinder engine |
KR950009974B1 (en) * | 1991-06-27 | 1995-09-04 | 미쓰비시덴키가부시키가이샤 | Control apparatus for a multi-cylnder internal combustion engine |
DE4141714C2 (en) * | 1991-12-18 | 2002-11-14 | Bosch Gmbh Robert | Control system for an internal combustion engine |
JP2790574B2 (en) * | 1992-06-25 | 1998-08-27 | 三菱電機株式会社 | Internal combustion engine control device |
US5209202A (en) * | 1992-07-27 | 1993-05-11 | Ford Motor Company | Multiple functions cam sensing |
-
1992
- 1992-12-16 DE DE4242419A patent/DE4242419A1/en not_active Withdrawn
-
1993
- 1993-11-27 DE DE59304010T patent/DE59304010D1/en not_active Expired - Lifetime
- 1993-11-27 JP JP51364194A patent/JP3442388B2/en not_active Expired - Fee Related
- 1993-11-27 EP EP94900734A patent/EP0676008B1/en not_active Expired - Lifetime
- 1993-11-27 WO PCT/DE1993/001134 patent/WO1994013951A1/en active IP Right Grant
- 1993-11-27 US US08/397,105 patent/US5572973A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9413951A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4242419A1 (en) | 1994-06-23 |
JP3442388B2 (en) | 2003-09-02 |
EP0676008B1 (en) | 1996-09-25 |
DE59304010D1 (en) | 1996-10-31 |
WO1994013951A1 (en) | 1994-06-23 |
US5572973A (en) | 1996-11-12 |
JPH08504492A (en) | 1996-05-14 |
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