EP0379720B1 - Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen - Google Patents

Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen Download PDF

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Publication number
EP0379720B1
EP0379720B1 EP89123776A EP89123776A EP0379720B1 EP 0379720 B1 EP0379720 B1 EP 0379720B1 EP 89123776 A EP89123776 A EP 89123776A EP 89123776 A EP89123776 A EP 89123776A EP 0379720 B1 EP0379720 B1 EP 0379720B1
Authority
EP
European Patent Office
Prior art keywords
stroke
outlet valve
opened
increasing
dead centre
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
Application number
EP89123776A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0379720A1 (de
Inventor
Alfred Neitz
Joachim Dipl.-Ing. Weiss
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge 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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP0379720A1 publication Critical patent/EP0379720A1/de
Application granted granted Critical
Publication of EP0379720B1 publication Critical patent/EP0379720B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a method for increasing the engine braking power according to the preamble of patent claim 1.
  • the object of the invention is to increase the final compression pressure, ie to make the work to be done for the compression larger.
  • the graph shows the crank angle degrees (° KW) on the abscissa and the respective valve strokes of the intake and exhaust valves on the ordinate.
  • the respective inlet valve E opens between top dead center (TDC) and bottom dead center (UT) of the piston (that is, over 180 ° crank angle).
  • the pressure in the cylinder is slightly below the ambient pressure.
  • the outlet valve A opens, with the result that the cylinder quickly fills with air from the exhaust manifold, since at this moment the pressure difference between the exhaust manifold and the cylinder prevails.
  • This pressure difference is large enough to ensure an intensive pressure increase in the cylinder even with a smaller stroke and a short opening time of the exhaust valve (from UT to approx. 80 ° crank angle to UT).
  • the pressure in the exhaust manifold is maintained by a brake flap. It is necessary to drill holes in the brake flap, otherwise the pressure in the exhaust manifold will increase excessively. By equalizing the pressure with the cylinder when opening the exhaust valve in the UT, the pressure in the manifold drops slightly. However, the "pressure reservoir" exhaust manifold is refilled at the end of the following compression stroke when the compressed air flows from the cylinder into the manifold.
  • the final compression pressure here is much higher than with known processes (Jacobs-Bremse) because the air is already at a higher pressure at the beginning of the compression cycle than could be achieved with a charge change restricted to the intake of air. Accordingly, the work to be done for compaction is also considerably larger.
  • the work recovery from the air remaining in the cylinder, which is still under pressure, is to be reduced to a minimum.
  • the pressure in the exhaust manifold should be maintained where possible.
  • the outlet valve A is closed at the same time or with a certain overlap (in the diagram, the outlet valve A is open approx. 30 ° before TDC to 30 ° crank angle after TDC) and the inlet valve E is opened. This largely prevents backflow from the exhaust manifold into the intake duct, while the cylinder can be emptied unhindered.
  • the cylinder pressure drops rapidly to ambient pressure; after a short time the outflow process takes in fresh air, which starts the cycle again.
  • a braking power of about 300 kW can be achieved at an average exhaust gas back pressure of 3.3 bar (absolute).

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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP89123776A 1989-01-12 1989-12-22 Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen Expired - Lifetime EP0379720B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900739 1989-01-12
DE3900739A DE3900739A1 (de) 1989-01-12 1989-01-12 Verfahren zur steigerung der motorbremsleistung bei viertakt-hubkolben-brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0379720A1 EP0379720A1 (de) 1990-08-01
EP0379720B1 true EP0379720B1 (de) 1993-02-24

Family

ID=6371954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123776A Expired - Lifetime EP0379720B1 (de) 1989-01-12 1989-12-22 Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen

Country Status (6)

Country Link
US (1) US4981119A (ja)
EP (1) EP0379720B1 (ja)
JP (1) JP2798461B2 (ja)
DE (2) DE3900739A1 (ja)
RU (1) RU1797672C (ja)
ZA (1) ZA90189B (ja)

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* Cited by examiner, † Cited by third party
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SE466320B (sv) * 1989-02-15 1992-01-27 Volvo Ab Foerfarande och anordning foer motorbromsning med en fyrtakts foerbraenningsmotor
DE4038334C1 (ja) * 1990-12-01 1991-11-28 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4227927C2 (de) * 1992-08-22 1995-02-23 Man Nutzfahrzeuge Ag Mechanismus zum Umschalten einer Brennkraftmaschine von einer Betriebsart auf eine andere Betriebsart
DE4309860C1 (de) * 1993-03-26 1994-06-09 Daimler Benz Ag Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierter Luft
DE4425956C2 (de) * 1994-07-21 1997-06-05 Daimler Benz Ag Verfahren und Vorrichtung zum Betreiben eines Dieselmotors
US5540201A (en) 1994-07-29 1996-07-30 Caterpillar Inc. Engine compression braking apparatus and method
US5647318A (en) 1994-07-29 1997-07-15 Caterpillar Inc. Engine compression braking apparatus and method
US5526784A (en) 1994-08-04 1996-06-18 Caterpillar Inc. Simultaneous exhaust valve opening braking system
US5586531A (en) * 1995-11-28 1996-12-24 Cummins Engine Company, Inc. Engine retarder cycle
DE19614923C2 (de) * 1996-04-16 1999-05-06 Daimler Benz Ag Kraftfahrzeug mit einer Zusatzbremseinrichtung und Verfahren zum Notfall- Abbremsen eines derartigen Kraftfahrzeuges
US5724939A (en) * 1996-09-05 1998-03-10 Caterpillar Inc. Exhaust pulse boosted engine compression braking method
US5787858A (en) * 1996-10-07 1998-08-04 Meneely; Vincent Allan Engine brake with controlled valve closing
US5787859A (en) * 1997-02-03 1998-08-04 Diesel Engine Retarders, Inc. Method and apparatus to accomplish exhaust air recirculation during engine braking and/or exhaust gas recirculation during positive power operation of an internal combustion engine
US5809964A (en) * 1997-02-03 1998-09-22 Diesel Engine Retarders, Inc. Method and apparatus to accomplish exhaust air recirculation during engine braking and/or exhaust gas recirculation during positive power operation of an internal combustion engine
DE19728350A1 (de) * 1997-07-03 1998-12-03 Daimler Benz Ag Verfahren und Vorrichtung zur Erhöhung der Motorbremsleistung von Brennkraftmaschinen
DE69837810T2 (de) * 1997-10-03 2007-10-11 Diesel Engine Retarders, Inc., Wilmington Verfahren und vorrichtung zur geregelten abgasrückführung in einer brennkraftmaschine mit retarder und starthilfe
US6321717B1 (en) * 2000-02-15 2001-11-27 Caterpillar Inc. Double-lift exhaust pulse boosted engine compression braking method
WO2002018761A1 (en) 2000-08-29 2002-03-07 Jenara Enterprises Ltd. Apparatus and method to oprate an engine exhaust brake together with an exhaust gas recirculation system
US6609495B1 (en) 2000-12-19 2003-08-26 Caterpillar Inc Electronic control of engine braking cycle
US6622694B2 (en) 2001-07-30 2003-09-23 Caterpillar Inc Reduced noise engine compression release braking
US6620077B2 (en) * 2001-09-04 2003-09-16 Caterpillar Inc Work machine having a drive train with an enhanced braking mode
US6772742B2 (en) 2002-03-01 2004-08-10 International Engine Intellectual Property Company, Llc Method and apparatus for flexibly regulating internal combustion engine valve flow
DE102004019021A1 (de) * 2004-04-20 2005-11-10 Bayerische Motoren Werke Ag Verfahren zum Betrieb einer 4-Takt-Brennkraftmaschine
DE112006000194B4 (de) * 2005-01-17 2017-03-23 Avl List Gmbh Verfahren und Steuerungseinrichtung zum Betreiben einer Brennkraftmaschine
DE502005005662D1 (de) * 2005-05-13 2008-11-20 Daimler Ag Zweitakt-motorbremsverfahren für eine aufgeladene brennkraftmaschine
FR2900201A1 (fr) * 2006-04-19 2007-10-26 Peugeot Citroen Automobiles Sa Procede de creation d'un couple negatif par un moteur a combustion interne et de reglage de la valeur dudit couple
US7568465B1 (en) * 2008-04-18 2009-08-04 Caterpillar Inc. Engine retarder having multiple modes
US20110120431A1 (en) * 2008-07-10 2011-05-26 Lilly Daryl A Exhaust Gas Recirculation Valve Actuator
EP2321511A4 (en) * 2008-07-10 2014-12-31 Actuant Corp ACTUATOR VALVE FOR TURBOCHARGER SYSTEMS
CA2730125C (en) * 2008-07-10 2017-10-03 Actuant Corporation Exhaust gas recirculation butterfly valve
CA2730129A1 (en) * 2008-07-10 2010-01-14 Actuant Corporation Butterfly valve for turbocharger systems
US8281587B2 (en) * 2009-08-13 2012-10-09 International Engine Intellectual Property Company, Llc Supercharged boost-assist engine brake
US8689770B2 (en) 2009-11-02 2014-04-08 International Engine Intellectual Property Company, Llc High-temperature-flow engine brake with valve actuation
US8752519B2 (en) * 2009-12-15 2014-06-17 GM Global Technology Operations LLC Air assist start stop methods and systems
SE539214C2 (sv) * 2013-12-05 2017-05-16 Scania Cv Ab Förbränningsmotor, fordon som innefattar en sådan förbränningsmotor och förfarande för att styra en sådan förbränningsmotor
DE102013022037A1 (de) 2013-12-20 2015-06-25 Daimler Ag Verfahren zum Betreiben einer Hubkolben-Verbrennungskraftmaschine
DE102015016526A1 (de) * 2015-12-19 2017-06-22 Daimler Ag Verfahren zum Betreiben einer Hubkolben-Verbrennungskraftmaschine
SE541888C2 (en) * 2017-03-22 2020-01-02 Scania Cv Ab Four-Stroke Internal Combustion Engine and thereto related Vehicle and Method
DE102021002865A1 (de) * 2021-06-02 2022-12-08 Daimler Truck AG Verfahren zum Betreiben einer Verbrennungskraftmaschine, insbesondere eines Kraftfahrzeugs

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DE1732252U (de) * 1956-07-17 1956-10-18 Carl Kaelble G M B H Motoren U Motorbremse, insbesondere fuer kraftfahrzeuge.
DE2728259A1 (de) * 1977-06-23 1979-01-04 Kloeckner Humboldt Deutz Ag Viertakt-hubkolben-brennkraftmaschine
DE3003566A1 (de) * 1980-02-01 1981-08-06 Klöckner-Humboldt-Deutz AG, 5000 Köln Bremsvorrichtung fuer eine ventilgesteuerte brennkraftmaschine
US4455977A (en) * 1981-08-31 1984-06-26 Tecumseh Products Company Compression brake system
US4423712A (en) * 1982-04-28 1984-01-03 The Jacobs Mfg. Company Engine retarder slave piston return mechanism
US4510900A (en) * 1982-12-09 1985-04-16 The Jacobs Manufacturing Company Hydraulic pulse engine retarder
US4485780A (en) * 1983-05-05 1984-12-04 The Jacobs Mfg. Company Compression release engine retarder
US4572114A (en) * 1984-06-01 1986-02-25 The Jacobs Manufacturing Company Process and apparatus for compression release engine retarding producing two compression release events per cylinder per engine cycle
US4592319A (en) * 1985-08-09 1986-06-03 The Jacobs Manufacturing Company Engine retarding method and apparatus
US4664070A (en) * 1985-12-18 1987-05-12 The Jacobs Manufacturing Company Hydro-mechanical overhead for internal combustion engine
US4706625A (en) * 1986-08-15 1987-11-17 The Jacobs Manufacturing Company Engine retarder with reset auto-lash mechanism
AT404288B (de) * 1986-10-30 1998-10-27 Avl Verbrennungskraft Messtech Motorbremse bei einer brennkraftmaschine für kraftfahrzeuge
US4741307A (en) * 1987-02-17 1988-05-03 Pacific Diesel Brave Co. Apparatus and method for compression release retarding of an engine
US4793307A (en) * 1987-06-11 1988-12-27 The Jacobs Manufacturing Company Rocker arm decoupler for two-cycle engine retarder
US4932372A (en) * 1988-05-02 1990-06-12 Pacific Diesel Brake Co. Apparatus and method for retarding a turbocharged engine

Also Published As

Publication number Publication date
DE58903612D1 (de) 1993-04-01
US4981119A (en) 1991-01-01
DE3900739A1 (de) 1990-07-19
DE3900739C2 (ja) 1991-03-14
RU1797672C (ru) 1993-02-23
EP0379720A1 (de) 1990-08-01
JPH02227509A (ja) 1990-09-10
JP2798461B2 (ja) 1998-09-17
ZA90189B (en) 1990-10-31

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