EP0379720B1 - Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen - Google Patents
Verfahren zur Steigerung der Motorbremsleistung bei Viertakt-Hubkolben-Brennkraftmaschinen Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000002485 combustion reaction Methods 0.000 title claims description 3
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
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)
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) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1989
- 1989-01-12 DE DE3900739A patent/DE3900739A1/de active Granted
- 1989-12-22 EP EP89123776A patent/EP0379720B1/de not_active Expired - Lifetime
- 1989-12-22 DE DE8989123776T patent/DE58903612D1/de not_active Expired - Fee Related
-
1990
- 1990-01-08 RU SU904742729A patent/RU1797672C/ru active
- 1990-01-11 ZA ZA90189A patent/ZA90189B/xx unknown
- 1990-01-11 US US07/463,425 patent/US4981119A/en not_active Expired - Fee Related
- 1990-01-11 JP JP2002634A patent/JP2798461B2/ja not_active Expired - Lifetime
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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