EP0779428B1 - Verfahren und Vorrichtung zur Motormomentregelung - Google Patents
Verfahren und Vorrichtung zur Motormomentregelung Download PDFInfo
- Publication number
- EP0779428B1 EP0779428B1 EP96117576A EP96117576A EP0779428B1 EP 0779428 B1 EP0779428 B1 EP 0779428B1 EP 96117576 A EP96117576 A EP 96117576A EP 96117576 A EP96117576 A EP 96117576A EP 0779428 B1 EP0779428 B1 EP 0779428B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine torque
- throttle valve
- suppression
- torque
- fuel injection
- 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.)
- Expired - Lifetime
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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
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- 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
- F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
Definitions
- the invention relates to a method for engine torque control according to the preamble of claim 1 and to one its implementation suitable device.
- a method and device for reducing engine torque by fuel injection suppression are in the published patent application DE 42 11 173 A1 as part of a traction control system described there for a motor vehicle with spark ignition Internal combustion engine disclosed.
- This traction control system Excess torque occurs when excessive drive slip occurs of the motor depending on this drive slip, the gear ratio, the current engine torque corresponding to the operation of an associated engine control unit and the mass moment of inertia of the drive train and the wheels calculated in such a way that when the current engine torque is reduced by the amount of excess moment of excessive Traction slip disappears.
- the excess torque to be eliminated is supplied to an engine torque reduction control, which controls a fuel injection control such that one selected from a given masking pattern set Masking pattern that has a certain number of cylinders and a a certain number of duty cycles is periodic reduction torque corresponding to the excess torque a suitable masking of injections is set.
- the regulation there provides for parallel to the respective ignition suppression, the original ignition angle to adjust so that the drive torque by Adaptation torque is changed, the part of the reduction torque is and in its size at least a part of the injection fades available step ranges for the reduction torque corresponds.
- the shifted ignition angle evenly to the original ignition angle returned.
- the invention is a technical problem of providing a device for engine torque control of the aforementioned Type based on which requested engine torque reductions with comparatively little effort and short response times as well as favorable engine torque dynamics.
- the individual blanking levels on the difference between that from a Engine air mass measurement derived, load-indicated actual engine torque and the desired target engine torque, these Difference preferably as a percentage of the load-indicated engine torque is related.
- the actual actual engine torque corresponds the product of the load-indicated engine torque with the fraction cylinder not hidden.
- the single figure shows a schematic functional diagram of a Engine torque control device.
- the engine torque control device shown contains a hot-film air mass measuring element (1) to measure the engine air mass as a measure of the corresponding load-indicated actual engine torque (M I ).
- a throttle valve (2) and, on the other hand, conventional fuel injection elements (not shown) are used as actuators, which are controlled by an injection control according to usual criteria and on the basis of a stored masking pattern set for injection masking processes.
- the skip pattern set can consist of stepped skip patterns in which another one of eight successive injections is successively masked out.
- the step (3) indicated in the figure for selecting a respective masking pattern is based on the size of the difference (dM) between the detected load-indicated actual engine torque (M I ) and the desired engine torque (M SA ) requested by a traction control system, the latter is subjected to a suitable dynamic adaptation by means of a filter stage (4) indicated by dashed lines in the figure.
- the injection blanking part of the system queries (step 5) whether the difference between the load-indicated actual engine torque (M I ) and the target engine torque (M SA ), which is determined by an associated subtractor (6), is positive.
- this torque difference (dM) is positive, the appropriate masking pattern is selected depending on this difference.
- the torque difference (dM) is related as a percentage to the load-indicated actual engine torque (M I ), and a corresponding percentage range is assigned to each of the masking patterns. This is the first time that there is an injection suppression in the lowest stage, in which every second injection of one of the four cylinders is suppressed when the percentage torque difference has exceeded a value of 12.5%. With a further increase of 12.5%, the transition to the fade-out pattern of the next higher level takes place.
- An applicable hysteresis threshold is provided for switching back from a masking pattern higher to the masking pattern of the next lower level, in order to avoid a possible oscillation between two neighboring masking patterns.
- the respective threshold values for activating a masking pattern can be varied depending on the application.
- the fuel cut-off associated with fuel injection suppression works with the next higher cylinder. On request the torque reduction becomes larger Starting point of the new blanking pattern in the front half of the pattern placed while reducing the reduction request is in the back half of the pattern if it is assumed that when dropping the blanking pattern set the injection on one respective cylinder always first in the front half of the sample is hidden. It can also be provided that the application certain fade-out patterns within a specifiable load-speed range is omitted. The fuel cut will depending on the engine temperature, engine speed and others Influencing factors locked. As soon as with a cylinder the fuel is switched off, the lambda control goes to control mode and for the correction of the residual gas proportion a presettable one Last offset value added to the raw raw value.
- a throttle valve angle ( ⁇ R ) to be set as a function of time is determined by a subtractor (8) of a throttle valve actuating unit, on the one hand the output signal of a converter (9) which converts the desired engine torque (M SA ) requested by the traction control system into a corresponding throttle valve angle value, and on the other hand the output signal of a PI controller (10) is supplied, at which the torque difference (dM) between the load-indicated actual engine torque (M I ) and the target engine torque (M SA ) is present on the input side.
- the output signal of the PI controller (10) is limited to an applicable positive or negative maximum value.
- the PI controller (10) is only active in operating phases with traction control. In this way, the value of the throttle valve angle belonging to the requested target engine torque (M SA ) is superimposed by the additional value brought about by the PI controller (10), with which the throttle valve control controls the difference between the load-indicated engine torque (M I ) unaffected by the injection suppression. and set engine torque (M SA ) with simultaneous gradual withdrawal of the injection suppression.
- M I load-indicated engine torque
- M SA set engine torque
- the throttle valve actuating value ( ⁇ R ) which is decisive during the engine torque reduction processes which are requested by the traction control system is fed to a throttle valve selection unit (10) of the throttle valve actuating unit, which additionally has a control value ( ⁇ F ) which is detected via the accelerator pedal and which is based on a corresponding driver request.
- a control value ( ⁇ T ) based on a cruise control and a control value ( ⁇ E ) based on engine drag control for the throttle valve (2) are fed and which selects the valid throttle valve control value ( ⁇ S ) in accordance with the respective operating conditions.
- the throttle valve control value ( ⁇ E ) selected in operating phases with active engine drag control is generated by a subtractor (11), which receives the output signal of a converter (12) which converts a target engine torque (M SS ) requested by the engine drag control into a corresponding throttle valve angle value converts, and on the other hand the output signal of a further PI controller (13) is supplied, to the input side via an associated subtractor (14) the torque difference between the load-indicated actual engine torque (M I ) and the target engine torque requested in this case by the engine drag control (M SS ) is supplied.
- the output signal of the PI controller (13) is also limited to an applicable positive or negative maximum value.
- this measure of a corresponding torque difference feedback via the PI controller (13) also reliably regulates the difference between the load-indicated actual engine torque (M I ) and the required target engine torque during operating phases with engine drag control ( M SS ).
- the engine torque control system according to the invention shown by way of example enables the implementation of a respective requirement after a rapid engine torque reduction with a relative simple system structure through an inexpensive coupling of fuel injection blanking and throttle valve interventions such that the demand for rapid torque reduction fulfilled by a corresponding injection suppression and their Effect in the further course of the wearer reacting successively Load control on the associated throttle valve control is transmitted, the injection suppression automatically take back.
- the fade out patterns are dependent from the difference of that represented by the engine air mass load-indicated actual engine torque to the required target engine torque, by means of a direct comparison of moments, selected.
- this torque difference serves as an input variable for throttle valve control, with which the latter Torque reducing effect of the injection suppression with the is able to take on her own, greater reaction time and that Injection suppression simultaneously reversed in stages can be.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
Claims (3)
- Verfahren zur Motormomentregelung, bei demfür eine rasche Motormomentreduzierung eine Kraftstoffeinspritzausblendung unter Verwendung eines abhängig von der Motormomentabweichung aus einem Ausblendmustersatz auswählbaren Ausblendmusters und parallel zur Kraftstoffeinspritzausblendung ein motormomentreduzierender Drosselklappenstelleingriff vorgenommen werden,der Drosselklappenstelleingriff auf die Einregelung des lastindizierten Ist-Motormomentes (MI) auf das angeforderte Soll-Motormoment (MSA) eingestellt und die Kraftstoffeinspritzausblendung im Verlauf des Motormomentreduzierungsvorgangs sukzessive um den Momentreduzierungsbeitrag des Drosselklappenstelleingriffs zurückgenommen wird.
- Verfahren nach Anspruch 1, weiter
dadurch gekennzeichnet, daß
als Kriterium für die Auswahl des jeweiligen Ausblendmusters die Differenz zwischen dem aus einer Motorluftmassenmessung gewonnenen, lastindizierten Ist-Motormoment (MI) und dem angeforderten Soll-Motormoment (MSA) dient. - Vorrichtung zur Motormomentregelung, miteiner Einrichtung zur Kraftstoffeinspritzausblendung anhand eines abgespeicherten Ausblendmustersatzes undeiner Drosselklappenstelleinheit,die Einrichtung zur Kraftstoffeinspritzausblendung das Ausblendmuster für eine jeweilige Einspritzausblendung in Abhängigkeit vom Wert der Differenz zwischen dem aus einer Motorluftmassenmessung abgeleiteten, lastindizierten Ist-Motormoment (MI) und dem angeforderten Soll-Motormoment (MSA) auswählt unddie Drosselklappenstelleinheit einer jeweiligen Einspritzausblendung einen Drosselklappenstelleingriff überlagert, bei dem sich der einzustellende Drosselklappenwinkel (αR) aus einer zum Soll-Motormoment (MSA) gehörigen und einer die Momentendifferenz (dM) zwischen dem lastindizierten Ist-Motormoment (MI) und dem Soll-Motormoment (MSA) ausregelnden Komponente zusammensetzt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19546554 | 1995-12-13 | ||
DE19546554A DE19546554C1 (de) | 1995-12-13 | 1995-12-13 | Verfahren und Vorrichtung zur Motormomentregelung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0779428A2 EP0779428A2 (de) | 1997-06-18 |
EP0779428A3 EP0779428A3 (de) | 1999-01-07 |
EP0779428B1 true EP0779428B1 (de) | 2000-06-14 |
Family
ID=7780026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96117576A Expired - Lifetime EP0779428B1 (de) | 1995-12-13 | 1996-11-02 | Verfahren und Vorrichtung zur Motormomentregelung |
Country Status (3)
Country | Link |
---|---|
US (1) | US5724942A (de) |
EP (1) | EP0779428B1 (de) |
DE (2) | DE19546554C1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3709652B2 (ja) * | 1997-05-13 | 2005-10-26 | 日産自動車株式会社 | 車両用駆動力制御装置 |
JP3395708B2 (ja) | 1999-04-27 | 2003-04-14 | 株式会社日立製作所 | ハイブリッド車両 |
US6615126B1 (en) | 2002-03-05 | 2003-09-02 | Daimlerchrysler Corporation | Torque management based traction control system |
JP2003293823A (ja) * | 2002-03-27 | 2003-10-15 | Robert Bosch Gmbh | 駆動滑り制御方法および装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3737698A1 (de) * | 1987-11-06 | 1989-05-18 | Bayerische Motoren Werke Ag | Regeleinrichtung zur regelung des antriebsdrehmomentes einer brennkraftmaschine eines kraftfahrzeuges |
JP2524246B2 (ja) * | 1990-06-13 | 1996-08-14 | 本田技研工業株式会社 | 駆動輪スリップ制御装置 |
US5224045A (en) * | 1990-11-27 | 1993-06-29 | Navistar International Transportation Corp. | Automotive vehicle microprocessor control having grade-holder vehicle speed control |
JPH04271929A (ja) * | 1991-02-26 | 1992-09-28 | Jidosha Denki Kogyo Co Ltd | 車両用定速走行装置 |
DE4211173C2 (de) * | 1992-04-03 | 1994-11-24 | Audi Ag | Antriebsschlupfregelung für ein Kraftfahrzeug mit einer fremdgezündeten Brennkraftmaschine |
US5213178A (en) * | 1992-04-21 | 1993-05-25 | General Motors Corporation | Traction control system with fuel and spark control |
JP3236344B2 (ja) * | 1992-05-13 | 2001-12-10 | 本田技研工業株式会社 | 車両の動力源出力制御装置 |
US5392215A (en) * | 1992-08-17 | 1995-02-21 | Mitsubishi Denki Kabushiki Kaisha | Automatic cruising speed controller for an automotive vehicle |
JPH06144080A (ja) * | 1992-11-12 | 1994-05-24 | Jidosha Denki Kogyo Co Ltd | 自動定速走行装置の制御方法 |
DE4334864C2 (de) * | 1993-10-13 | 2003-01-30 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
DE4341584B4 (de) * | 1993-12-07 | 2004-12-23 | Robert Bosch Gmbh | Steuersystem für eine Brennkraftmaschine |
DE4342333C2 (de) * | 1993-12-11 | 2003-06-18 | Bosch Gmbh Robert | Steuereinrichtung für die zylinderindividuelle Kraftstoffeinspritzung bei einer Brennkraftmaschine |
US5463993A (en) * | 1994-02-28 | 1995-11-07 | General Motors Corporation | Engine speed control |
-
1995
- 1995-12-13 DE DE19546554A patent/DE19546554C1/de not_active Revoked
-
1996
- 1996-11-02 DE DE59605438T patent/DE59605438D1/de not_active Expired - Lifetime
- 1996-11-02 EP EP96117576A patent/EP0779428B1/de not_active Expired - Lifetime
- 1996-12-13 US US08/767,253 patent/US5724942A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59605438D1 (de) | 2000-07-20 |
EP0779428A2 (de) | 1997-06-18 |
US5724942A (en) | 1998-03-10 |
DE19546554C1 (de) | 1997-02-27 |
EP0779428A3 (de) | 1999-01-07 |
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