EP0280678B1 - Verfahren zur herabsetzung der stickstoffoxidabgabe in auspuffgasen von dieselmotoren - Google Patents
Verfahren zur herabsetzung der stickstoffoxidabgabe in auspuffgasen von dieselmotoren Download PDFInfo
- Publication number
- EP0280678B1 EP0280678B1 EP86905301A EP86905301A EP0280678B1 EP 0280678 B1 EP0280678 B1 EP 0280678B1 EP 86905301 A EP86905301 A EP 86905301A EP 86905301 A EP86905301 A EP 86905301A EP 0280678 B1 EP0280678 B1 EP 0280678B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gases
- diesel engine
- nitric oxide
- recirculated
- conducted
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
-
- 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
- the present invention relates to a method for reducing nitric oxide emissions in the exhaust gases from diesel engines by means of conducting water into the engine and by recirculating the exhaust gases, according to the first part of claim 1.
- a drawback in the use of combustion engines such as diesel engines arises in the form of harmful compounds contained in exhaust gases. Among them, the most dangerous and the most difficult to eliminate are nitric oxides. The amount of created nitric oxides is comparable to the temperature prevailing in the combustion chamber, as well as to the oxygen content of the explosion gas.
- a previously known method for reducing the amount of nitric oxides is to lower the combustion temperature by adding water into the combustion chamber of the diesel engine.
- the water addition can be carried out in various ways: according to the DE Patent Application No. 31 44472, water is sprayed separately into the combustion chamber. In connection to the water addition, the water condensed from the exhaust gases can also be utilized; this water is conducted into the combustion chamber by means of spraying, as is the case with water additions in the apparatus introduced in the DE Patent Application No. 2851 232.
- the supplied water is fed directly into the suction duct ( D E Patent Application No. 28 31 694), or the water is first dispersed in a finer form by feeding the fresh combustion air through a liquid volume and further into the suction duct (DE Patent Applications Nos.
- the water to be conducted into the combustion chamber can also be first evaporated by means of a thermal exchanger, so that the heating is carried out by conducting the hot exhaust gases through a water container.
- the resulting steam is then conducted into the suction duct, whereas the exhaust gases are discharged into the open air.
- the evaporation method is introduced for instance in the SE Patent Publication No. 428587 and DE Patent Applications Nos. 21 54755 and 2604050.
- Another prior art method for diminishing the nitric oxide emissions of a diesel engine is partial recirculation of the exhaust gases.
- the exhaust gas is recirculated back into the engine in dry form.
- the recirculated exhaust gas functions as an inert gas and thus reduces the oxygen content of the gas contained in the combustion chamber. Simultaneously the production of nitric oxide is also diminished.
- the regulation of recirculated exhaust gases is also difficult to control.
- the recirculated exhaust gases are cooled off for instance in order to reduce thermal strain.
- the object of the present invention is to eliminate some of the drawbacks of the prior art and to realize an improved, more secure method for reducing the nitric oxide emissions of diesel engine exhaust gases, by means of applying the recirculation of cooled exhaust gases combined to the aqueous vapours resulting from the wet cleaning of the exhaust gases.
- the features of the invention are apparent from the appended patent claim 1.
- the exhaust gases from the engine are conducted through a catalyzer, advantageously for reducing the amount of carbon monoxide and hydrocarbons, before directing the gases into the wet cleaner.
- the exhaust gases are simultaneously washed and cooled.
- the cooled exhaust gases are further conducted, humidified by the vapours created in the washing, back into the suction duct of the diesel engine.
- the recirculated exhaust gas, the quantity whereof is about 20% of the whole exhaust gas volume, is mixed in the general suction air flow by means of a mixer valve and a nozzle, whereby the mixture ratio can be maintained constant irrespective of the charge and the speed of rotation.
- the recirculation of the exhaust gases, the cooling of the recirculated exhaust gases, and the water additions into the combustion chamber, as well as the regulation of the volume of the returned gas, can thus all be combined.
- the exhaust gases from the diesel engine 1 are conducted, through the catalyzer 2, into the wet cleaner 3.
- the exhaust gases are cooled and washed.
- the major part of the exhaust gases are discharged through the exhaust pipe 4.
- the damp exhaust gas to be recirculated according to the invention is conducted, through the return pipe 5, into the suction system 10 of the diesel engine.
- the recirculated exhaust gas supplied from the return pipe 5, which gas is humidified by the steam created in the cleaner 3, is conducted, via the recirculation valve 6, back to the recirculation nozzle 7.
- the suction air of the diesel engine, drawn in through the air purifier 8, is also conducted to the nozzle 7.
- the mixture of recirculated exhaust gas and pure suction air thus created in the nozzle 7 is further conducted, via the suction duct 10 of the diesel engine, into the combustion chamber 9, wherefrom the created exhaust gases are further conducted to the catalyzer 2.
- the recirculation valve 6 and the nozzle 7 there is achieved and advantageous regulation of the volume of the recirculated exhaust gas, so that a profitable mixture ratio between the suction air and the recirculated exhaust gas is maintained irrespective of any possible changes in the charge or in the speed of rotation.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Treating Waste Gases (AREA)
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FI1986/000094 WO1988001016A1 (en) | 1986-09-08 | 1986-09-08 | Method for reducing nitric oxide emissions in exhaust gases from diesel engines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0280678A1 EP0280678A1 (de) | 1988-09-07 |
EP0280678B1 true EP0280678B1 (de) | 1990-01-31 |
Family
ID=8556404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86905301A Expired - Lifetime EP0280678B1 (de) | 1986-09-08 | 1986-09-08 | Verfahren zur herabsetzung der stickstoffoxidabgabe in auspuffgasen von dieselmotoren |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0280678B1 (de) |
JP (1) | JPH01500765A (de) |
DE (1) | DE3668665D1 (de) |
FI (1) | FI73297C (de) |
RU (1) | RU1839695C (de) |
WO (1) | WO1988001016A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK170218B1 (da) * | 1993-06-04 | 1995-06-26 | Man B & W Diesel Gmbh | Stor trykladet dieselmotor |
US5694908A (en) * | 1996-05-08 | 1997-12-09 | Hsu; Chih-Cheng | Auxiliary water-supply sytem for an internal combustion engine |
GB2313155B (en) * | 1996-05-08 | 1998-06-24 | Hsu Chih Cheng | An auxiliary water supply system for an internal combustion engine |
KR100720876B1 (ko) * | 2002-05-21 | 2007-05-22 | 맨 디젤 에이/에스 | 대형 과급 내연기관 |
JP5787500B2 (ja) * | 2010-08-24 | 2015-09-30 | 三菱重工業株式会社 | エンジン排気ガス浄化装置及び船舶 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1632285A (en) * | 1923-12-06 | 1927-06-14 | John J Georgi | Gas generator |
US2737936A (en) * | 1953-02-09 | 1956-03-13 | Clement S Clarke | Internal combustion engine |
US2870758A (en) * | 1958-01-07 | 1959-01-27 | Fred A Standiford | Decontamination system |
US3139873A (en) * | 1963-03-19 | 1964-07-07 | Donald L Gardner | Exhaust and water injector for internal combustion engines |
SE7703011L (sv) * | 1977-03-17 | 1978-09-18 | Lindstroem O | Sett och anordning for drift av forbrenningsmotorer |
-
1985
- 1985-03-12 FI FI850966A patent/FI73297C/fi not_active IP Right Cessation
-
1986
- 1986-09-08 EP EP86905301A patent/EP0280678B1/de not_active Expired - Lifetime
- 1986-09-08 WO PCT/FI1986/000094 patent/WO1988001016A1/en active IP Right Grant
- 1986-09-08 JP JP86505140A patent/JPH01500765A/ja active Pending
- 1986-09-08 DE DE8686905301T patent/DE3668665D1/de not_active Expired - Fee Related
-
1988
- 1988-05-06 RU SU884355739A patent/RU1839695C/ru active
Also Published As
Publication number | Publication date |
---|---|
EP0280678A1 (de) | 1988-09-07 |
FI73297B (fi) | 1987-05-29 |
FI850966A0 (fi) | 1985-03-12 |
RU1839695C (ru) | 1993-12-30 |
DE3668665D1 (de) | 1990-03-08 |
FI73297C (fi) | 1987-09-10 |
WO1988001016A1 (en) | 1988-02-11 |
JPH01500765A (ja) | 1989-03-16 |
FI850966L (fi) | 1986-09-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6301890B1 (en) | Gas mixture preparation system and method | |
US5758606A (en) | Method of and device for supplying water or other vapor to the intake air of an internal combustion engine | |
US5353585A (en) | Controlled fog injection for internal combustion system | |
US3918412A (en) | Fuel treatment for combustion engines | |
RU2289704C2 (ru) | Способ очистки отработавших газов двигателя внутреннего сгорания и устройство для подачи влажного воздуха в двигатель | |
US2977940A (en) | Method of operation of internal combustion engines | |
US4958490A (en) | Method for reducing nitric oxide emissions in exhaust gases from diesel engines | |
US6912977B2 (en) | Hydrogen assisted combustion | |
EP0280678B1 (de) | Verfahren zur herabsetzung der stickstoffoxidabgabe in auspuffgasen von dieselmotoren | |
AU2002240970A1 (en) | Method and apparatus for reducing combustion engine emissions | |
US6196165B1 (en) | Device for supplying vapor to the intake air of an internal combustion engine | |
EP1205659A2 (de) | Verfahren zur Reduzierung des NOX-Ausstosses einer augeladenen Kolbenkraftmaschine | |
JP2005520965A (ja) | 過給ピストン・エンジン及びピストン・エンジン装置の窒素酸化物(NOx)排出を低減させる方法 | |
US4844028A (en) | Method for reducing the consumption of fuel of a heat engine which employs combustion of hydrocarbons, and for reducing atmospheric pollutants, and device for carrying out this method | |
US4242076A (en) | Process of combustion | |
HU201982B (en) | Internal combustion power machine | |
US4982715A (en) | Supplemental fuel vapor system | |
CA1054468A (en) | Method and device avoiding the pollution of the atmosphere by noxious gases | |
US6210150B1 (en) | Method and an apparatus of operating a boiler fired with liquid or gaseous hydrocarbons | |
US4119063A (en) | Feed system for internal combustion engines to which a fuel-air mixture and water vapor are supplied | |
SU1712641A1 (ru) | Способ работы двигател внутреннего сгорани | |
GB2328248A (en) | Apparatus for preconditioning hydrocarbon fuel for i.c. engines | |
JPS62240414A (ja) | 排気ガスの処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19880217 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 19890330 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT SE |
|
ITF | It: translation for a ep patent filed |
Owner name: ING. A. GIAMBROCONO & C. S.R.L. |
|
REF | Corresponds to: |
Ref document number: 3668665 Country of ref document: DE Date of ref document: 19900308 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19920807 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19920814 Year of fee payment: 7 Ref country code: GB Payment date: 19920814 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19920819 Year of fee payment: 7 |
|
ITTA | It: last paid annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19930908 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19930909 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19930908 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19940531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19940601 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 86905301.7 Effective date: 19940410 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050908 |