EP1763626A1 - Dispositif de commande de moteurs a combustion interne comportant un systeme de compression et un systeme de reglage des temps de commande d'une soupape d'admission - Google Patents

Dispositif de commande de moteurs a combustion interne comportant un systeme de compression et un systeme de reglage des temps de commande d'une soupape d'admission

Info

Publication number
EP1763626A1
EP1763626A1 EP05755640A EP05755640A EP1763626A1 EP 1763626 A1 EP1763626 A1 EP 1763626A1 EP 05755640 A EP05755640 A EP 05755640A EP 05755640 A EP05755640 A EP 05755640A EP 1763626 A1 EP1763626 A1 EP 1763626A1
Authority
EP
European Patent Office
Prior art keywords
inlet
control
valve
control device
intake
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.)
Withdrawn
Application number
EP05755640A
Other languages
German (de)
English (en)
Inventor
Peter Frehland
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1763626A1 publication Critical patent/EP1763626A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0261—Controlling the valve overlap
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0203—Variable control of intake and exhaust valves
    • F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0269—Controlling the valves to perform a Miller-Atkinson cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D23/00—Controlling engines characterised by their being supercharged
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • 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 invention relates to a control device for internal combustion engines with a charging system according to the preamble of claim 1.
  • Such a control device is known for example from DE 43 12 085 A1.
  • This known control device deals with the setting of an optimal valve overlap depending on the load and speed of the internal combustion engine, especially in supercharged internal combustion engines. Only the control time for opening, but not for closing the intake valve is considered.
  • the control device described here addresses the problem that unburned fuel can be blown through the cylinder in the event of a valve overlap by the charging system (so-called “blow-by” effect).
  • the object of the invention is to improve a control device of the type mentioned at the beginning in such a way that, at least in the part-load range, a reduction in fuel consumption is achieved while preventing excessive valve overlap.
  • a reduction in fuel consumption is achieved by dethrottling with early intake closing while at the same time preventing excessive valve overlap without changing the total intake control time.
  • the invention relates to the use of a fixed, reduced intake control time with a charging system.
  • a system with exhaust gas turbocharging or with compressor charging is preferably used as the charging system.
  • the intake length is the same Dimension the intake cam assigned to the intake valve in such a way that the control time for closing the intake valve when the system is in the zero position for adjusting the control times is at or before the crankshaft angle (° KW) assigned to the lower charge cycle dead center (LUT) of the cylinder piston Control times, in particular due to camshaft rotation, have also long been known under the abbreviation VANOS.
  • the zero position corresponds to the largest inlet spread, ie the maximum adjustment position in the late direction.
  • the inlet length is usually defined in relation to a given opening and closing valve stroke a little over 0 mm, here preferably to 1 mm opening and closing stroke, whereby the asymptotic start and end courses of a valve lift curve are “cut off” with regard to a sharper course ,
  • the inlet length of the inlet cam assigned to the inlet valve is preferably dimensioned such that the control time for closing the inlet valve when the maximum adjustment position of the system for adjusting the valve timing is present is around the entire adjustment range in the direction before the crankshaft angle assigned to the lower charge cycle dead center of the cylinder piston ,
  • the inlet length of the inlet cam assigned to the inlet valve is additionally dimensioned in such a way that a predetermined maximum permissible valve overlap is not exceeded if the control times are adjusted in the direction of early for unthrottling the charge exchange process due to the early inlet closing time.
  • the inlet length or effective inlet control time according to the invention (from an opening and closing height of the inlet valve of approximately 1 mm) of the inlet cam assigned to the inlet valve is preferably approximately between 150 degrees crankshaft angle and 190 degrees crankshaft angle.
  • the invention is based on the finding that the intake closure is brought forward, preferably by the full VANOS adjustment range from Z. B. is known to be 60 ° KW-70 ° KW in the early direction, with regard to the bottom dead center in the intake stroke during the charge change, a limitation of the intake volume is achieved. This saves fuel.
  • the solution according to the invention only provides for the use of a “shorter” cam (inlet length from 1 mm valve lift ⁇ 190 degrees crankshaft angle [° KW]) in comparison with conventionally used cams (inlet length from 1 mm valve lift> 200 degrees crankshaft angle [° KW]).
  • the invention is further based on the knowledge that simply advancing the inlet closing alone is not sufficient, but that the valve overlap is also avoided by the inventive shortening of the inlet length; because, on the other hand, an excessive residual gas component could worsen the combustion.
  • the intake valve control diagram c is shown for the maximum adjustment position of the system for adjusting the control times in the early direction.
  • the system for adjusting the control times can also temporarily adjust the intake closing timing to the lower dead center (LUT) of the gas exchange (here zero position).
  • LUT lower dead center
  • the system for adjusting the control times can also temporarily adjust the intake closing timing to the lower dead center (LUT) of the gas exchange (here zero position).
  • V forward displacement
  • V forward displacement
  • E dethrottling
  • AS the crankshaft angle range in which the exhaust valve and intake valve are open at the same time (ie between E ⁇ and AS).
  • valve control diagrams shown here show that, according to the prior art, even if the control times are fully adjusted in the early direction, intake closing always takes place after the bottom gas exchange dead center lower charge exchange dead center instead.
  • the invention offers a cost-neutral solution for reducing fuel consumption.

Landscapes

  • 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)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un dispositif de commande de moteurs à combustion interne comportant un système de compression et un système de réglage des temps de commande d'au moins une soupape d'admission d'un cylindre au sein d'une plage de réglage prédéfinie, entre une position zéro et une position de réglage maximale, de l'ordre d'une plage d'angle de vilebrequin maximale définie, en direction d'une avance à l'allumage. La longueur d'admission de la came d'admission affectée à la soupape d'admission est choisie de telle manière que le temps de commande pour la fermeture de la soupape d'admission est situé au niveau ou en amont de l'angle de vilebrequin affecté au point mort de changement de compression du piston de cylindre lorsque le système de réglage des temps de commande est en position zéro.
EP05755640A 2004-06-16 2005-06-15 Dispositif de commande de moteurs a combustion interne comportant un systeme de compression et un systeme de reglage des temps de commande d'une soupape d'admission Withdrawn EP1763626A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004028972A DE102004028972B4 (de) 2004-06-16 2004-06-16 Steuervorrichtung für Brennkraftmaschinen mit einem Aufladesystem
PCT/EP2005/006410 WO2005124126A1 (fr) 2004-06-16 2005-06-15 Dispositif de commande de moteurs a combustion interne comportant un systeme de compression et un systeme de reglage des temps de commande d'une soupape d'admission

Publications (1)

Publication Number Publication Date
EP1763626A1 true EP1763626A1 (fr) 2007-03-21

Family

ID=34971316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05755640A Withdrawn EP1763626A1 (fr) 2004-06-16 2005-06-15 Dispositif de commande de moteurs a combustion interne comportant un systeme de compression et un systeme de reglage des temps de commande d'une soupape d'admission

Country Status (4)

Country Link
US (1) US7444965B2 (fr)
EP (1) EP1763626A1 (fr)
DE (1) DE102004028972B4 (fr)
WO (1) WO2005124126A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103189623A (zh) * 2010-11-08 2013-07-03 丰田自动车株式会社 发动机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512943C2 (sv) * 1998-10-05 2000-06-12 Saab Automobile Förbränningsmotor
CH318281A (de) * 1951-06-26 1956-12-31 Miller Ralph Verfahren zum Betrieb einer Kolbenbrennkraftmaschine und Kolbenbrennkraftmaschine zur Durchführung des Verfahrens
GB746800A (en) * 1954-03-05 1956-03-21 English Electric Co Ltd Improvements in and relating to pressure charged internal combustion engines
DE2942326A1 (de) * 1979-10-19 1981-04-23 Volkswagenwerk Ag, 3180 Wolfsburg Verfahren zum betrieb einer antriebseinheit, bestehend aus einer mit einem abgasturbolader ausgeruesteten brennkraftmaschine
JP3325598B2 (ja) * 1992-04-13 2002-09-17 マツダ株式会社 機械式過給機付エンジンの制御装置
JP3298358B2 (ja) * 1995-04-25 2002-07-02 日産自動車株式会社 ディーゼルエンジンにおける圧縮端温度制御方法および制御装置
JP2003232233A (ja) * 2001-12-06 2003-08-22 Nissan Motor Co Ltd 内燃機関の制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005124126A1 *

Also Published As

Publication number Publication date
US20070119399A1 (en) 2007-05-31
DE102004028972B4 (de) 2007-03-29
DE102004028972A1 (de) 2006-01-12
WO2005124126A1 (fr) 2005-12-29
US7444965B2 (en) 2008-11-04

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