GB2409294A - Idle control of an internal combustion engine having continuous lambda control - Google Patents

Idle control of an internal combustion engine having continuous lambda control Download PDF

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Publication number
GB2409294A
GB2409294A GB0427336A GB0427336A GB2409294A GB 2409294 A GB2409294 A GB 2409294A GB 0427336 A GB0427336 A GB 0427336A GB 0427336 A GB0427336 A GB 0427336A GB 2409294 A GB2409294 A GB 2409294A
Authority
GB
United Kingdom
Prior art keywords
amplitude
idling
lambda control
forced
internal combustion
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
Application number
GB0427336A
Other versions
GB2409294B (en
GB0427336D0 (en
Inventor
Norbert Pelz
Matthias Schultalbers
Peter Duenow
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of GB0427336D0 publication Critical patent/GB0427336D0/en
Publication of GB2409294A publication Critical patent/GB2409294A/en
Application granted granted Critical
Publication of GB2409294B publication Critical patent/GB2409294B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/1502—Digital data processing using one central computing unit
    • F02P5/1508—Digital data processing using one central computing unit with particular means during idling
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • 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
    • F02D41/16—Introducing closed-loop corrections for idling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
    • 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
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/045—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions combined with electronic control of other engine functions, e.g. fuel injection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Ignition Timing (AREA)

Abstract

A method for operating an internal combustion engine in particular an Otto engine, having continuous lambda control 12 and having an idling controller 10. From the lambda control 12 an additional square wave signal of low amplitude in the form of a forced amplitude is added to a desired injection quantity of the internal combustion engine. If the revolution rate deviates from a desired value, the idling controller 10 outputs an output signal for altering advance of the ignition timing to compensate for the deviation. In so doing the forced amplitude of the lambda control 12 is added 18 to the output of the idling controller 10 for the advance angle intervention. Prior to addition 18 of the forced amplitude of the lambda control 12 to the output of the idling controller10 , the forced amplitude may be multiplied 16 by a predetermined gain value.

Description

DESCRIPTION
Method for operating an internal combustion engine having continuous lambda control The invention relates to a method for operating an internal combustion engine, in particular an Otto engine, having continuous lambda control and having an idling controller, wherein by the lambda control an additional square wave signal of low amplitude in the form of a forced amplitude is added to a desired injection quantity of the internal combustion engine and wherein, if the revolution rate deviates from a desired value, the idling controller outputs an output signal for advance angle intervention to compensate for the deviation.
In the case of Otto engines having continuous lambda control an additional square wave signal of low amplitude is added to the desired injection quantity of the engine during operation for various reasons (diagnosis, catalytic converter function). Thus, for example from DE 40 24 212 C2 a method is known for continuous lambda control of an internal combustion engine having a catalyzer in which, at least in predetermined operating states, a control oscillation of controllable amplitude is produced and in which the control oscillation amplitude is set in dependence upon a conversion rate evaluation value for the catalyzer, and in particular on the basis of initially maximum amplitude for use in a new catalyzer to a value which is lower the more the conversion rate evaluation value indicates a deterioration in the conversion rate of the catalyzer. The additional signal leads via the lambda degree of efficiency to a change in the actual engine torque.;..This has the disadvantage that perceptible revolution rate fluctuations - . , : At. . occur during idling;. ; Furthermore, idling controllers are known which react with a corresponding change in the desired torque when the revolution rate deviates from the desired value. In principle two adjusting variables are available for this purpose. With the aid of the throttle valve it is possible for more serious disturbances to be controlled pneumatically. The setting of the engine torque via the throttle valve is relatively sluggish because of the dynamics of the intake manifold. Rapid intervention is therefore carried out with the aid of advance angle intervention. A corresponding torque reserve is reserved for this purpose during idling.
From WO 96/35874 a method is known for controlling the torque of an internal combustion engine having a control unit, which sets at least the air supply and advance angle in such a way that during idling a preset torque reserve is set via the advance angle. This torque reserve during idling effects an increase in the filling of the internal combustion engine to a preset extent. In order to maintain the torque of the internal combustion engine unchanged the advance angle is adjusted accordingly. This has a detrimental effect on the degree of efficiency of the internal combustion engine but rapid changes in torque, either increasing or decreasing, can be compensated for by adjustment of the advance angle.
From DE 197 39 567 Al a method is known for controlling the torque of the drive unit of an internal combustion engine, wherein in dependence upon a first desired torque value the filling of the internal combustion engine and in dependence upon at least one second desired torque value a parameter permitting rapid torque intervention, such as advance angle or fuel metering is controlled, wherein the first and second desired torque values are detected on the basis of desired values for the torque of the internal combustion engine provided by individual functions.
In so doing the desired torque values for the filling intervention and for the rapid torque intervention are different at least in selected operating states, wherein at least one desired value is drawn upon only to determine one of the desired torque values and/or at least one desired value is corrected when forming a desired torque value for shifting the degree of efficiency.
It is an object of the invention to compensate for the change, which is conditional upon the forced amplitude, in the engine torque during idling. 30:
To this end in a method of the type mentioned above provision is made in accordance with the invention for the forced amplitude of the lambda control to be added to the output of the idling controller for the advance angle intervention.
This has the advantage that by compensation of the effect of the lambda controller forced amplitude by means of advance angle intervention the idling quality is improved.
In a particularly preferred embodiment prior to addition of the forced amplitude of the lambda control to the output of the idling controller for the advance angle intervention, the forced amplitude is multiplied by a predetermined gain value for the compensation.
The forced amplitude is expediently multiplied by a predetermined gain value for the compensation when a P-portion of the idling controller is active for the advance angle intervention, wherein the forced amplitude of the lambda controller is added to the P-portion of the advance angle intervention of the idling controller.
By reason of the fact that the gain factor is selected in such a way that engine torque of the same magnitude opposing the effect of the forced amplitude is set, the revolution rate fluctuations, which are conditional upon the forced amplitude, are suppressed during idling and the quality of the idling control is improved.
A specific embodiment of the invention is explained in more detail hereinunder, by way of example, with the aid of the drawing in which the single figure shows a block diagram of the operation of the method in accordance with the invention.
in the block diagram shown in the single figure the number 10 designates an output of an idling controller for the ignition path and 12 designates a forced amplitude of lambda control not otherwise shown in more detail. The forced amplitude 12 of the lambda control is multiplied by a gain value 14 for the compensation in a multiplier 16. In an adder 18 the forced amplitude of the lambda control, which is multiplied by the gain value 14 for the compensation, is added to the output 10 of the idling controller for the ignition path. As a result a new output 20 of the idling controller is obtained for the ignition path.
When the P-portion of the idling controller is active, the forced amplitude 12 of the lambda controller is multiplied by a factor 14 and added to the P-portion 10 of the ignition path controller. The gain factor 14 is selected in such a way that engine torque of the same magnitude opposing the effect of the forced amplitude 12 is set. In this way the revolution rate fluctuations, which are conditional upon the forced amplitude 12, during idling are suppressed and the quality of the idling control is improved. s

Claims (4)

1 Method for operating an internal combustion engine having continuous lambda control and having an idling controller, wherein by the lambda control an additional square wave signal of low amplitude in the form of a forced amplitude is added to a desired injection quantity of the internal combustion engine and wherein, if the revolution rate deviates from a desired value, the idling controller outputs an output signal for advance angle intervention to compensate for the deviation, characterised in that the forced amplitude of the lambda control is added to the output of the idling controller for the advance angle intervention.
2 Method as claimed in claim 1, characterized in that prior to addition of the forced amplitude of the lambda control to the output of the idling controller for the advance angle intervention, the forced amplitude is multiplied by a predetermined gain value for the compensation.
3 Method as claimed in at least one of the preceding claims, characterized in that the forced amplitude is multiplied by a predetermined gain value for the compensation when a P-portion of the idling controller is active for the advance angle intervention, wherein the forced amplitude of the lambda controller is added to the P-portion of the advance angle intervention of the idling controller.
4 Method as claimed in at least one of claims 2 to 3, characterized in that the gain factor is selected in such a way that engine torque of the same magnitude opposing the effect of the forced amplitude is set.
Method as claimed in claim 1, characterized in that the engine is an Otto engine.
GB0427336A 2003-12-16 2004-12-14 Method for operating an internal combustion engine having continuous lambda control Expired - Fee Related GB2409294B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10358900A DE10358900A1 (en) 2003-12-16 2003-12-16 Method for operating an internal combustion engine with continuous lambda control

Publications (3)

Publication Number Publication Date
GB0427336D0 GB0427336D0 (en) 2005-01-19
GB2409294A true GB2409294A (en) 2005-06-22
GB2409294B GB2409294B (en) 2006-04-19

Family

ID=34089314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0427336A Expired - Fee Related GB2409294B (en) 2003-12-16 2004-12-14 Method for operating an internal combustion engine having continuous lambda control

Country Status (2)

Country Link
DE (1) DE10358900A1 (en)
GB (1) GB2409294B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148791A (en) * 1990-09-19 1992-09-22 Hitachi, Ltd. Method of electronic engine control for internal combustion engine having a plurality of cylinders
US5652380A (en) * 1995-02-24 1997-07-29 Unisia Jecs Corporation Apparatus and method for detecting output fluctuations of an internal combustion engine, and apparatus and method for controlling the engine
EP1057992A2 (en) * 1999-06-05 2000-12-06 Robert Bosch Gmbh Method for operating an internal combustion engine
US20030098010A1 (en) * 2000-03-28 2003-05-29 Mario Kustosch Method and device for controlling the idle operation of a drive unit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024212C2 (en) * 1990-07-31 1999-09-02 Bosch Gmbh Robert Process for the constant lambda control of an internal combustion engine with a catalyst
DE19517673A1 (en) * 1995-05-13 1996-11-14 Bosch Gmbh Robert Method and device for controlling the torque of an internal combustion engine
DE19739567B4 (en) * 1997-09-10 2007-06-06 Robert Bosch Gmbh Method and device for controlling the torque of the drive unit of a motor vehicle
DE10206675C1 (en) * 2002-02-18 2003-05-22 Siemens Ag Forced stimulation method for lambda regulation for IC engine with catalyzer has forced stimulation parameters matched to engine operating temperature

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148791A (en) * 1990-09-19 1992-09-22 Hitachi, Ltd. Method of electronic engine control for internal combustion engine having a plurality of cylinders
US5652380A (en) * 1995-02-24 1997-07-29 Unisia Jecs Corporation Apparatus and method for detecting output fluctuations of an internal combustion engine, and apparatus and method for controlling the engine
EP1057992A2 (en) * 1999-06-05 2000-12-06 Robert Bosch Gmbh Method for operating an internal combustion engine
US20030098010A1 (en) * 2000-03-28 2003-05-29 Mario Kustosch Method and device for controlling the idle operation of a drive unit

Also Published As

Publication number Publication date
GB2409294B (en) 2006-04-19
DE10358900A1 (en) 2005-07-21
GB0427336D0 (en) 2005-01-19

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20131214