EP0561740A1 - Méthode d'opération d'un moteur Diesel et ce moteur Diesel - Google Patents

Méthode d'opération d'un moteur Diesel et ce moteur Diesel Download PDF

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Publication number
EP0561740A1
EP0561740A1 EP93810182A EP93810182A EP0561740A1 EP 0561740 A1 EP0561740 A1 EP 0561740A1 EP 93810182 A EP93810182 A EP 93810182A EP 93810182 A EP93810182 A EP 93810182A EP 0561740 A1 EP0561740 A1 EP 0561740A1
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EP
European Patent Office
Prior art keywords
pressure
fuel
injection
combustion
engine
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
EP93810182A
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German (de)
English (en)
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EP0561740B1 (fr
Inventor
Lars Thorbjörn Collin
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.)
Lars Collin Consult AB
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Lars Collin Consult AB
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4197819&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0561740(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lars Collin Consult AB filed Critical Lars Collin Consult AB
Priority to EP95116260A priority Critical patent/EP0698729A1/fr
Publication of EP0561740A1 publication Critical patent/EP0561740A1/fr
Application granted granted Critical
Publication of EP0561740B1 publication Critical patent/EP0561740B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F02B3/08—Methods of operating
    • 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
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • a large number of methods and devices for injecting and igniting diesel fuel in an internal combustion engine are known and customary.
  • the fuel is brought to a certain injection pressure by means of a pump and the injection valve is opened at the same time.
  • the valve like the injection pump, can be actuated by a device synchronized with the engine.
  • the valve opens automatically as a function of the fuel pressure as soon as a certain pressure value is exceeded.
  • injection valves are opened by the injection pump at the beginning of the pressure build-up and closed again after the pressure drops.
  • the opening value is usually around 20% or 30% of the maximum working pressure of the fuel pump.
  • TDC top dead center
  • Such motors have good efficiency.
  • parameters that ensure good efficiency are often suitable for producing bad emission values (especially NO x ). This includes, for example, temperature, excess oxygen during combustion, combustion pressure and combustion duration.
  • the invention has for its object to avoid the disadvantages of the known, in particular to create a method of the type mentioned that reduces the pollutant emission of NO x with high efficiency.
  • fuel is supplied to the combustion chamber 2 of a schematically illustrated diesel engine through an injection valve 1.
  • the injection valve 1 is opened by a control arrangement 3 at the desired point in time of the combustion cycle.
  • the injection valve 1 is supplied with fuel by a pump 4, the pump 4 also being controlled as a function of the crankshaft angle or the respective point in time of the engine cycle.
  • the fuel pressure generated by the pump 4 is a maximum of about 1000 to 1500 atm (atmospheres).
  • the injection valve 1 While in conventional diesel engines the injection valve opens at the beginning of the pressure build-up by the pump 4 (at the latest at 200-300 atm), it is provided according to the invention that the injection valve 1 only opens at the time T1 when the fuel pressure applied to the injection valve is already around 1000 atm, ie has reached approximately 83% of the maximum pressure of approximately 1200 atm. Due to the high pressure, the diesel fuel is injected into the combustion chamber 2 at an extraordinarily high speed and especially with the smallest droplet diameter, so that the combustion process is optimized and, above all, shortened. The injection valve 1 closes again at T2, the fuel pressure still being approximately 900-950 atm, ie over 70% of the maximum pressure. This ensures that large drops of fuel are not injected in the closing phase, which can impair the combustion process in this phase.
  • the pressure increase in the combustion chamber of an engine operated according to the invention takes place continuously until the time of ignition and gradually flattens out.
  • the ignition point tz is relatively late, so that the expansion of the ignited gas cloud falls into the engine's expansion phase. This ensures that there is no significant increase in pressure after ignition, which avoids additional heating due to pressure increase during combustion. In this way, pollutant emissions, especially the NO x content in the exhaust gas, can be drastically reduced in an optimal way.
  • the compression pressure of the engine must be increased to a value that enables late ignition and gas expansion in the engine's expansion phase.
  • Figure 4 shows a comparative test on a conventional diesel engine.
  • the engine was operated at various speed / load ratios 1 to 8 and the NO x emissions were measured and plotted in grams of NO x / kWh.
  • the top curve shows Test 1, in which the engine is unchanged was operated.
  • the opening pressure of the injection valve is 280 atm; the injection begins to build up at 20 ° before TDC and the compression ratio is 1:13.
  • the injection pressure is still at 280 atm; Now, however, the injection only begins to build up at 14 ° before TDC and inject in the TDC area. This shifts the timing of the ignition so that the combustion falls into the engine's expansion phase. In this test, there is no increase in pressure in the cylinder after ignition.
  • the compression ratio is 1:18.
  • the NO x emissions can be reduced to about half the value in the simplest way and without major changes to the engine. Only an insignificant, negligible increase in consumption was observed.
EP93810182A 1992-03-20 1993-03-12 Méthode d'opération d'un moteur Diesel et ce moteur Diesel Revoked EP0561740B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95116260A EP0698729A1 (fr) 1992-03-20 1993-03-12 Méthode de fonctionnement d'un moteur Diesel et moteur Diesel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH90192 1992-03-20
CH901/92 1992-03-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP95116260.1 Division-Into 1993-03-12

Publications (2)

Publication Number Publication Date
EP0561740A1 true EP0561740A1 (fr) 1993-09-22
EP0561740B1 EP0561740B1 (fr) 1996-05-15

Family

ID=4197819

Family Applications (2)

Application Number Title Priority Date Filing Date
EP95116260A Withdrawn EP0698729A1 (fr) 1992-03-20 1993-03-12 Méthode de fonctionnement d'un moteur Diesel et moteur Diesel
EP93810182A Revoked EP0561740B1 (fr) 1992-03-20 1993-03-12 Méthode d'opération d'un moteur Diesel et ce moteur Diesel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP95116260A Withdrawn EP0698729A1 (fr) 1992-03-20 1993-03-12 Méthode de fonctionnement d'un moteur Diesel et moteur Diesel

Country Status (6)

Country Link
US (1) US5522359A (fr)
EP (2) EP0698729A1 (fr)
JP (1) JPH0642374A (fr)
DE (1) DE59302555D1 (fr)
DK (1) DK0561740T3 (fr)
FI (1) FI931221A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3622446B2 (ja) 1997-09-30 2005-02-23 日産自動車株式会社 ディーゼルエンジンの燃焼制御装置
US6557503B2 (en) * 2001-08-08 2003-05-06 General Electric Co. Method for lowering fuel consumption and nitrogen oxide emissions in two-stroke diesel engines
US7663283B2 (en) * 2003-02-05 2010-02-16 The Texas A & M University System Electric machine having a high-torque switched reluctance motor
US6935304B1 (en) 2004-03-17 2005-08-30 International Engine Intellectual Property Company, Llc Increasing the duration of peak combustion pressure in cylinders of a diesel engine using fuel injection control strategies
DE102008016600A1 (de) 2008-04-01 2009-10-08 Volkswagen Ag Selbstzündende Brennkraftmaschine
DE102009043480A1 (de) 2009-09-30 2011-03-31 Volkswagen Ag Verbrennungsmotor mit Selbstzündung mit einem niedrigen geometrischen Verdichtungsverhältnis und einer Injektoreinrichtung
DE102009043479A1 (de) 2009-09-30 2011-03-31 Volkswagen Ag Verbrennungsmotor mit Selbstzündung und einem niedrigen geometrischen Verdichtungsverhältnis

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032656A1 (de) * 1980-08-29 1982-04-29 Willibald 8000 München Hiemer Brennkraft-hubkolbenmaschinen
US4674448A (en) * 1985-07-04 1987-06-23 Sulzer Brothers Limited Fuel injection system for a multi-cylinder reciprocating internal combustion engine
US4883032A (en) * 1989-01-23 1989-11-28 Ford Motor Company In-cylinder control of particulates and nitric oxide for diesel engine
US5012786A (en) * 1990-03-08 1991-05-07 Voss James R Diesel engine fuel injection system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125076A (en) * 1964-03-17 Constant pressure combustion autoignition engine
DE67207C (de) * 1892-09-01 1893-02-23 R. DIESEL in Berlin NW., Brücken-Allee 15. Vom 28. Fe-• bruar 1892 ab Arbeitsverfahren und ausführungsart für verbrennungskraftmaschinen
US2534322A (en) * 1949-11-22 1950-12-19 Diesel Power Inc Method of operating diesel-type internal-combustion engines
US4359025A (en) * 1979-12-10 1982-11-16 Stefan Zeliszkewycz Continuous flow fuel injector for internal combustion engines
US4899699A (en) * 1988-03-09 1990-02-13 Chinese Petroleum Company Low pressure injection system for injecting fuel directly into cylinder of gasoline engine
US4924828A (en) * 1989-02-24 1990-05-15 The Regents Of The University Of California Method and system for controlled combustion engines
US5265562A (en) * 1992-07-27 1993-11-30 Kruse Douglas C Internal combustion engine with limited temperature cycle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032656A1 (de) * 1980-08-29 1982-04-29 Willibald 8000 München Hiemer Brennkraft-hubkolbenmaschinen
US4674448A (en) * 1985-07-04 1987-06-23 Sulzer Brothers Limited Fuel injection system for a multi-cylinder reciprocating internal combustion engine
US4883032A (en) * 1989-01-23 1989-11-28 Ford Motor Company In-cylinder control of particulates and nitric oxide for diesel engine
US5012786A (en) * 1990-03-08 1991-05-07 Voss James R Diesel engine fuel injection system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.J.BROEZE 'COMBUSTION IN PISTON ENGINES' 10. Oktober 1963 , H.STAM N.V. , HAARLEM, HOLLAND *

Also Published As

Publication number Publication date
DK0561740T3 (da) 1996-09-30
EP0698729A1 (fr) 1996-02-28
EP0561740B1 (fr) 1996-05-15
FI931221A (fi) 1993-09-21
US5522359A (en) 1996-06-04
JPH0642374A (ja) 1994-02-15
FI931221A0 (fi) 1993-03-19
DE59302555D1 (de) 1996-06-20

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