WO2004055345A1 - Procede pour commander un changement de fonctionnement dans un moteur a combustion interne - Google Patents

Procede pour commander un changement de fonctionnement dans un moteur a combustion interne Download PDF

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Publication number
WO2004055345A1
WO2004055345A1 PCT/DE2003/003424 DE0303424W WO2004055345A1 WO 2004055345 A1 WO2004055345 A1 WO 2004055345A1 DE 0303424 W DE0303424 W DE 0303424W WO 2004055345 A1 WO2004055345 A1 WO 2004055345A1
Authority
WO
WIPO (PCT)
Prior art keywords
switchover
pulse charging
valve lift
internal combustion
combustion engine
Prior art date
Application number
PCT/DE2003/003424
Other languages
German (de)
English (en)
Inventor
Frank Weiss
Hong Zhang
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2004055345A1 publication Critical patent/WO2004055345A1/fr

Links

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
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/08—Modifying distribution valve timing for charging purposes
    • F02B29/083—Cyclically operated valves disposed upstream of the cylinder intake valve, controlled by external means
    • 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
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
    • F02D41/307—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes to avoid torque shocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/12—Engines characterised by fuel-air mixture compression with compression 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
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • 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
    • 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
    • F02D2250/22—Control of the engine output torque by keeping a torque reserve, i.e. with temporarily reduced drive train or engine efficiency
    • 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
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a method for controlling a switching operation in the operation of an internal combustion engine provided with an electronic operating control device.
  • One way to prevent such a torque jump is to operate the cylinders immediately after a valve lift switchover, for example from a smaller to a larger value with a reduced efficiency, for example by adjusting the ignition angle, in order to reduce the excess torque that occurs during the valve lift switchover ,
  • Such a switchover strategy would, however, have to be bought through increased fuel consumption.
  • the present invention is based on the object of specifying a method for controlling a corresponding switchover operation in the operation of the internal combustion engine, in which a torque jump is avoided in the most fuel-efficient and low-pollutant manner possible.
  • a device for pulse charging the cylinders of the internal combustion engine is used to avoid or at least reduce a jump in torque caused by the switching process by a corresponding change in the opposite direction of a torque generated by pulse charging.
  • Devices for pulse charging also called MIC (Meta Impuls Charger) are known, cf. z. B. DE 37 37 824 AI and DE 37 37 826 AI.
  • These devices consist of an additional valve arranged in the intake tract, the so-called air cycle valve, which closes the intake cross section of the intake tract for a short time and releases it again. This leads to an increased vacuum in the cylinder for a short time, which creates a pressure wave when the air cycle valve is opened, which causes a corresponding “pulse charging” of the cylinder.
  • the pulse charging has a very high dynamic, ie it responds immediately to a control intervention and it allows a practically infinite change in the suction Air mass and the torque made available thereby.
  • the method according to the invention takes advantage of this by switching the pulse charging on or off before the switching process and suddenly resetting it to its original state during the switching process. In this way, a deterioration in efficiency can be avoided or at least reduced by changing the ignition angle and / or air / fuel ratio during the changeover process.
  • the switchover process can be the switchover of the valve stroke of discretely adjustable intake valves or the switchover between stoichiometric and lean operation of the internal combustion engine.
  • valve lift of the intake valves is switched from a small value to a large value
  • a torque generated by pulse charging is increased before the valve lift switchover by switching on the device for pulse charging and thereby providing part of the air mass flow through the pulse charging.
  • the device for pulse charging is then switched off at the same time as the valve lift switchover, so that the torque provided by pulse charging is eliminated. This compensates or at least reduces the increase in the air mass flow or torque caused by the valve lift switchover.
  • valve lift of the intake valves is switched from a large to a small value, a torque generated by pulse charging is reduced before the valve lift switchover and simultaneously increased again with the valve lift switchover.
  • the device for pulse charging is controlled accordingly to compensate for a torque jump caused by the changeover by a corresponding opposite change in the torque provided by the pulse charging.
  • lean operation is to be understood in its most general form, ie it includes a homogeneously lean operation, a stratified lean operation and also a so-called HCCI operation.
  • HCCI homogeneous-ous charge compression ignition means an operating mode , in which the ignition of the air / fuel mixture takes place not by spark ignition, but by controlled auto-ignition, see for example US 6 260 520, US 6 390 054, DE 19927479 and WO 98/10179.
  • the method according to the invention enables a torque-neutral switching process in which an adjustment of the ignition angle and / or the air / fuel ratio to Avoiding a torque jump is avoided completely or at least partially.
  • the method according to the invention for controlling a changeover process is initially carried out for only a first part of the cylinders and, for this purpose, is delayed for a second part of the cylinders.
  • This is possible without any problems in the method according to the invention, since the pulse charging operates in a cylinder-selective manner.
  • the advantage of a step-by-step implementation of the reversing method according to the invention is that only a small change in torque occurs in each case during the changeover processes, which change can be compensated for more easily and more economically by a corresponding control intervention.
  • FIG. 1 shows a schematic illustration of an internal combustion engine
  • FIG. 2 shows a flowchart for a method for controlling the switching of the valve lift of the intake valves
  • FIG. 3 shows a flowchart for a method for switching the internal combustion engine from stoichiometric operation to leaner operation.
  • FIG. 1 schematically shows an internal combustion engine 1 of the Otto type with a plurality of cylinders 2 (only one of which is indicated), an intake tract 3, an exhaust tract 4, an intake valve 5, an exhaust valve (not shown), one Actuator with an adjustment mechanism 6 for the discrete adjustment of the valve lift of the intake valve 5, an injection valve 7 for injecting fuel, a spark plug 8 with an ignition angle adjustment mechanism 9, and a throttle valve 10 arranged in the intake tract 3 in the form of a throttle valve.
  • a device 11 for pulse charging in the form of a so-called air cycle valve is arranged in the intake tract 3 between the throttle valve 10 and the inlet valve 5.
  • the air cycle valve of the device 11 can be briefly closed and opened again during an intake cycle (that is to say when the inlet valve 5 is open) in order to generate a pulse charge of the cylinder 2 by the pressure pulse caused thereby.
  • the operation of internal combustion engine 1 is regulated by an electronic operating control device 12.
  • the operating control device 12 is connected to the intake valve or the adjustment mechanism 6, the injection valve 7, the spark plug 8, the ignition angle adjustment mechanism 9, the throttle valve 10 and the device 11 for pulse charging in order to operate them in dependence on To regulate control signals. Since control methods of this type are fundamentally known to the person skilled in the art, this is dealt with only to the extent that it is necessary for an understanding of the method according to the invention for controlling changeover processes.
  • the invention will first be described with reference to a method for switching the valve lift of the inlet valves 5 by the adjustment mechanism 6 between a small and a large valve lift.
  • FIG. 2 represents the steps for switching from a small to a large valve lift of the inlet valves 5.
  • the large valve lift of the inlet valves 5 leads, for example, to 50% more filling in the cylinders 2 and thus to a corresponding increase in the torque of 50%. It is assumed that the target torque to be delivered by the internal combustion engine 1 to its clutch (not shown) is 100 Nm before the switching process. If the valve stroke is adjusted without further control intervention, a clutch torque of 150 Nm would result with a large valve stroke. This jump in torque is avoided by the method according to the invention as follows.
  • the device 11 for pulse charging (MIC) is activated and the throttle valve 10 is adjusted in the closing direction (step 14).
  • the throttle valve 10 is expediently set by the operating control device 12 to an opening degree (target value), at which a torque of 100 Nm results after the switching process, when the valve stroke for all cylinders 2 has been adjusted to the large value.
  • the filling of the cylinders 2 and, accordingly, the torque are thus only partially provided by the throttle valve 10 (for example 66.7 Nm), while the remaining part (for example 33.3 Nm) is supplied by the device 11 for pulse charging (MIC) becomes.
  • step 15 the intake valves 5 are switched over to the large valve lift.
  • the device 11 for pulse charging is switched off. Both processes take place synchronously and without time delay.
  • the air mass flow additionally provided by the large valve lift leads, as already mentioned, to an increase in torque by 50%, i. that is, in the above numerical example from 66.7 Nm to 100 Nm.
  • the loss of the torque of 33.3 Nm provided by the pulse charging completely compensates for the increase in torque caused by the valve lift adjustment, so that the torque does not change when the valve lift is switched.
  • the remaining torque jump can be compensated for by a deterioration in the efficiency of the combustion in the cylinders. This is achieved, for example, by adjusting the ignition angle from a basic ignition angle in the direction of a later ignition time. point (a so-called retreat angle) or by adjusting the air / fuel ratio.
  • step 17 asks whether the switchover must take place immediately. If this is not the case, the program returns to a point between steps 14 and 15. However, if the switchover must take place immediately, the program proceeds to step 16.
  • the throttle valve 10 When switching from stoichiometric to lean operation, the throttle valve 10 is usually first adjusted in the opening direction in order to provide the additional air mass flow required for the lean operation. The changeover to the lean operation then takes place suddenly by the fuel supply and the ignition angle being adjusted accordingly. The resulting torque jump is compensated or at least reduced in principle according to the invention in the same way as was described in connection with the valve lift adjustment.
  • the device 11 for pulse charging if it was switched on, is switched off and the throttle valve 10 in Opening direction adjusted (step 18).
  • the throttle valve 10 is expediently set here to an opening degree (target value) which is required for optimal lean operation.
  • step 19 the system switches over to the lean operation by adjusting the injection valve 7 and the ignition accordingly.
  • the device 7 for pulse charging (MIC) is activated or switched on (step 20).
  • an additional torque compensation can be carried out by adjusting the ignition angle or the air / fuel ratio if the available pulse charging is not sufficient to completely compensate for the torque jump.
  • the method according to the invention for controlling the valve lift switchover or operating mode switchover can also be carried out specifically for the cylinder
  • the method according to the invention for controlling a switchover process can initially only be carried out for a part of the cylinders and with a time delay for a second part Carry out cylinder.
  • the switchover process is thus to a certain extent divided into two or more switchover processes, so that with each switchover process only a minor change in torque has to be compensated for by a corresponding change in the pulse charge.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L'objectif de l'invention est d'éviter une brusque modification de couple lors d'un changement de levée de soupapes d'admission régulables de manière discrète ou lors d'un passage entre un mode de fonctionnement stoechiométrique et un mode de fonctionnement avec un mélange pauvre. A cet effet, un dispositif servant à la suralimentation des cylindres par impulsion est actionné de sorte qu'une brusque modification de couple, provoquée par le changement de fonctionnement, soit évitée ou au moins réduite sous l'effet d'une modification de couple opposée, appropriée, produite par suralimentation par impulsion.
PCT/DE2003/003424 2002-12-16 2003-10-15 Procede pour commander un changement de fonctionnement dans un moteur a combustion interne WO2004055345A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10258803A DE10258803B4 (de) 2002-12-16 2002-12-16 Verfahren zum Steuern eines Umschaltvorganges einer Brennkraftmaschine
DE10258803.1 2002-12-16

Publications (1)

Publication Number Publication Date
WO2004055345A1 true WO2004055345A1 (fr) 2004-07-01

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PCT/DE2003/003424 WO2004055345A1 (fr) 2002-12-16 2003-10-15 Procede pour commander un changement de fonctionnement dans un moteur a combustion interne

Country Status (2)

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DE (1) DE10258803B4 (fr)
WO (1) WO2004055345A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1840352A2 (fr) * 2006-03-31 2007-10-03 Mahle International GmbH Système d'alimentation d'air frais et méthode d'opération pour un moteur à piston
US7513235B2 (en) * 2006-02-13 2009-04-07 Gm Global Technology Operations, Inc. Method and apparatus for operating impulse charger for transient torque management

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061143B4 (de) * 2004-12-20 2008-10-16 Audi Ag Verfahren und Vorrichtung zur Steuerung eines Verbrennungsmotors
DE102004061142B4 (de) * 2004-12-20 2008-10-16 Audi Ag Verfahren und Vorrichtung zur Steuerung eines Verbrennungsmotors
DE102015209392B4 (de) 2015-05-22 2018-10-04 Continental Automotive Gmbh Verfahren zum Steuern eines Umschaltvorgangs eines Ventils und Steuergerät

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JPH0599032A (ja) * 1991-10-11 1993-04-20 Toyota Motor Corp 筒内噴射式内燃機関のアイドリング制御装置
JPH10274070A (ja) * 1997-03-28 1998-10-13 Mazda Motor Corp 機械式過給機付筒内噴射式エンジン
GB2331596A (en) * 1997-11-25 1999-05-26 Daimler Benz Ag Control system for the supercharging pressure of a turbocharged internal combustion engine
EP1108872A2 (fr) * 1999-12-15 2001-06-20 Nissan Motor Co., Ltd. Dispositif et procédé pour commander un moteur à combustion interne avec distribution variable
US6390054B1 (en) * 2000-08-26 2002-05-21 Ford Global Technologies, Inc. Engine control strategy for a hybrid HCCI engine
GB2371425A (en) * 2000-09-21 2002-07-24 Ford Global Tech Inc Starter/alternator control system

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JP2701595B2 (ja) * 1991-07-01 1998-01-21 日産自動車株式会社 内燃機関の可変動弁装置
DE4308931C2 (de) * 1993-03-19 1997-02-20 Schatz Oskar Vorrichtung zum Aufladen einer Brennkraftmaschine der Kolbenbauart
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Publication number Priority date Publication date Assignee Title
JPH0599032A (ja) * 1991-10-11 1993-04-20 Toyota Motor Corp 筒内噴射式内燃機関のアイドリング制御装置
JPH10274070A (ja) * 1997-03-28 1998-10-13 Mazda Motor Corp 機械式過給機付筒内噴射式エンジン
GB2331596A (en) * 1997-11-25 1999-05-26 Daimler Benz Ag Control system for the supercharging pressure of a turbocharged internal combustion engine
EP1108872A2 (fr) * 1999-12-15 2001-06-20 Nissan Motor Co., Ltd. Dispositif et procédé pour commander un moteur à combustion interne avec distribution variable
US6390054B1 (en) * 2000-08-26 2002-05-21 Ford Global Technologies, Inc. Engine control strategy for a hybrid HCCI engine
GB2371425A (en) * 2000-09-21 2002-07-24 Ford Global Tech Inc Starter/alternator control system

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PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7513235B2 (en) * 2006-02-13 2009-04-07 Gm Global Technology Operations, Inc. Method and apparatus for operating impulse charger for transient torque management
EP1840352A2 (fr) * 2006-03-31 2007-10-03 Mahle International GmbH Système d'alimentation d'air frais et méthode d'opération pour un moteur à piston
EP1840352A3 (fr) * 2006-03-31 2010-03-31 Mahle International GmbH Système d'alimentation d'air frais et méthode d'opération pour un moteur à piston

Also Published As

Publication number Publication date
DE10258803B4 (de) 2005-02-10
DE10258803A1 (de) 2004-07-08

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