FI129819B - Method for starting a gas engine - Google Patents
Method for starting a gas engine Download PDFInfo
- Publication number
- FI129819B FI129819B FI20155795A FI20155795A FI129819B FI 129819 B FI129819 B FI 129819B FI 20155795 A FI20155795 A FI 20155795A FI 20155795 A FI20155795 A FI 20155795A FI 129819 B FI129819 B FI 129819B
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- FI
- Finland
- Prior art keywords
- gas
- starting
- cylinder
- working
- working cylinder
- Prior art date
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Classifications
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/02—Engines characterised by means for increasing operating efficiency
-
- 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
- F02B7/00—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel
- F02B7/06—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel the fuel in the charge being gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
-
- 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
- F02D41/008—Controlling each cylinder individually
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A method for starting a gas engine with more than one working cylinders is proposed, wherein the working cylinders are cylinder-selectively supplied with fuel gas and a starting gas quantity is supplied to the working cylinders and starting gas is cylinder-selectively supplied to at least one working cylinder.
Description
Method for starting a gas engine The present invention relates to a method for starting a gas engine with more than one working cylinder, wherein the working cylinders are cylinder-selectively supplied with fuel gas and a starting gas quantity is fed to the working cylinders, according to the preamble of Claim 1.
Gas engines are internal combustion engines, for the operation of which gaseous fuel is used instead of liquid fuel, which can be present for example in the form of natural gas, wood gas, landfill gas or hydrogen, this listing not be conclusive. Gas engines are often operated in a stationary manner, specifically as heat engines in combined heat and power plants or as ship's drive.
Prior Art WO 2010128127 A2 discloses a method for starting an internal combustion engine operating with combustible gas, with an internal combustion system, especially a large gas engine, wherein a burnable gas/air mixture is formed in the admission system, especially in a gas mixer, upstream from a charger, said engine comprising a first and a second group of cylinders. During the starting phase, a first group of cylinders is at least temporarily operated by sparking, and compressed air is at least temporarily blown into the cylinder chambers of the second group of cylinders. In order to ensure a reliable cold start of the internal combustion engine, the following steps are carried out: the gas/air S 25 mixture in the cylinder chambers of the first group of cylinders is ignited by means s of at least one starter iginition plug per cylinder; the supply of compressed air to N the second group of cylinders is stopped and the gas/air mixture blown into the I cylinder chambers of the second group of cylinders is ignited by means of at least a © one starter ignition plug per cylinder, when the rotational speed of the internal = 30 combustion engine exceeds a defined starting rotational speed; self-igniting pilot = fuel is introduced into the cylinder chambers of the first and second groups of N cylinders when a defined operating temperature is reached in the cylinder chambers of the cylinders; and the gas/air mixture is ignited by means of the self- igniting pilot fuel, the starter iginition plugs being deactivated.
Further Prior Art JP HO6257539 A discloses a large gas engine provided with a A- bank cylinder group and a B-bank cylinder group arranged in V-type.
A pipe for starter high- pressure air is connected continuously to the B-bank cylinder group through a starter valve.
At start of an engine, the starter valve is opened to supply starter high-pressure air to each cylinder of the B-bank cylinder group.
Also, a gas shut-off valve is arranged and connected to one sub-pipe connected to the B-bank cylinder group at a position before connection to the B-bank cylinder group.
Then, at start of the engine, the gas shut-off valve is closed to stop supplying burned gas to the B-bank cylinder group to which starter high-pressure air is charged.
By way of DE 10 2009 016 461 A1 attributable to the applicant, a gas engine has become known which operates according to the performance gas injection method (PGI), with which for igniting the gas mixture a fuel gas mixture under high pressure is injected into a prechamber of a respective working cylinder and an ignition source arranged in the prechamber for example in the form of a glow body is located, on which the ignitable gas mixture is ignited.
The flame front can then spread over passages in the prechamber into the main combustion chamber, in which for example a lean gas mixture is present.
The ignition mentioned here is the igniting of the gas mixture with the already running gas engine.
A gas engine that is still stationary, the crankshaft of which S 25 does not yet rotate, has to be put into operation via a starting procedure. 3 N For starting a gas engine, combustible mixture must be present in the combustion I chamber of the working cylinder in order to make possible the ignition in the Lo working cylinder and thus the starting-up of the gas engine.
It has been shown = 30 that such ignitable gas mixture often does not flare up during the first ignition = process and thus enters the exhaust tract via the exhaust control organs of the N working cylinder and ignitable gas mixture thus accumulates in the exhaust tract.
If an ignition of a working cylinder then occurs, hot exhaust gas exits into the exhaust tract and there is the risk of self-ignition of the ignitable gas mixture in the exhaust tract with a high increase of pressure. With centrally pre-mixed gas engines, fuel gas is mixed into the entire intake air quantity of the gas engine and the entire gas mixture so produced is ignitable and can therefore enter the exhaust tract in large quantities when during the starting process it is not ignited in the individual working cylinders. Even with a cylinder-selective supply of fuel gas for the individual working cylinders in the already running operation of the gas engine, the fuel gas quantity needed for starting the gas engine is centrally released, i.e. all working cylinders are simultaneously apportioned a starting gas quantity needed for igniting the individual working cylinders, which results in that with a gas engine in which not all working cylinders have an evenly favourable ignition behaviour, ignitable mixture accumulates in the exhaust tract and thus constitutes a substantial explosion hazard. By monitoring the ignition process of the gas engine and monitoring the gas composition in the exhaust tract during the starting process, this hazard can be reduced but it has been shown that this system still has improvement potential.
The method according to the invention comprises the features stated in Claim 1. Advantageous configurations thereof are described in the further claims. The invention creates a method for starting a gas engine with more than one S 25 working cylinder, wherein the working cylinders are cylinder-selectively supplied s with fuel gas and a starting gas guantity is fed to the working cylinders, which is N characterized in that starting gas is cylinder-selectively fed to at least one working I cylinder. A working cylinder to be supplied with starting gas is engine-specifically a © determined as a function of the starting willingness of the working cylinder and/or = 30 of the angle of rotation position of the working cylinder relative to at least one = further working cylinder and/or the position of the exhaust outlet of the working N cylinders in the exhaust tract of the gas engine.
In other words, this means that the starting method according to the invention is particularly suited for gas engines which can be cylinder-selectively supplied with fuel gas during the running operation of the gas engine, wherein in contrast with the previous starting method the starting gas quantity is no longer centrally released simultaneously for all working cylinders and all working cylinders are simultaneously fed with starting gas, but a starting gas quantity that is required for starting the combustion process in at least one working cylinder is cylinder- selectively fed to the working cylinder. A working cylinder of the multiple-cylinder gas engine can therefore be supplied with a starting gas guantity while another working cylinder is not yet supplied with starting gas while the first-mentioned working cylinder is supplied with starting gas. This results in that even when the starting gas guantity in the selected working cylinder fails to ignite and via the exhaust control organs enters the exhaust tract, no ignitable gas mixture is present in the exhaust tract since via the other working cylinders combustion air is pumped into the exhaust tract and the gas mixture is therefore diluted so far that it is no longer ignitable. The hazard of self-ignition of the gas mixture in the exhaust tract has thus been effectively eliminated. According to a further development of the method according to the invention it is provided that at least two working cylinders are cylinder-selectively supplied with a predetermined quantity of starting gas. Thus, the selected working cylinders can be supplied with a different quantity of starting gas as a function for example of empirical values during the operation of the specific gas engine. Gas engines have a tendency that individual working cylinders start more rapidly than other S 25 working cylinders or for starting require a starting gas quantity other than other s working cylinders of the gas engine and with the method according to the N invention, such specific particularities of a respective gas engine can be taken into I account. a
LO = 30 Thus, each working cylinder can be supplied with a specific starting gas guantity = adapted to its starting behaviour for secure initial ignition and the expulsion of N ignitable gas mixture into the exhaust tract of the gas engine reliably avoided.
According to an advantageous further development of the method according to the invention it is provided that starting gas is fed to at least one further working cylinder only once the completed ignition in at least one working cylinder has been detected. This means in other words that only in particular when in at least one 5 working cylinder or in a gas engine, that requires ignition in more than one working cylinder for starting up, an ignition in the required number of cylinders has taken place, a starting gas quantity is fed to further working cylinders which can be metered so that the probability of non-ignition in the working cylinder concerned has been significantly reduced.
The method according to the invention is characterized in that they cylinder selective starting gas quantity is determined so that in the exhaust tract of the gas engine no ignitable mixture is present. Consequently, no hazardous ignition of a gas mixture of a working cylinder that was not ignited during the starting process entering the exhaust tract can take place. When in the case of a multi-cylinder gas engine during the starting process the ignition has already taken place in a plurality of the working cylinders and only a specific working cylinder proves to be unwilling to ignite, the starting gas quantity fed to this working cylinder can for example be increased in steps until ignition has also commenced in this working cylinder. The gas quantity entering the exhaust tract via the non-ignited working cylinder can thus be cylinder-selectively controlled with the aim that no ignitable gas mixture accumulates in the exhaust tract. S 25 The seguence of the cylinder-selective supply of starting gas to the individual s working cylinders can be engine-specifically determined as a function for example N of whether a working cylinder has proved to be ignition-unwilling during preceding I starting attempts so that this working cylinder is supplied with starting gas only in a © particular when other working cylinders of the gas engine have already started to = 30 ignite and because of this the probability of a successful ignition process in the = ignition-unwilling working cylinder has significantly increased.
In this way, a sequential release of starting gas to individual working cylinders as a function of the mentioned parameters can also be realised which results in a gentle increase of the torque curve of the gas engine during the starting process, as a result of which undesirable torque amplitudes can be avoided.
According to an advantageous further development of the invention it is also provided that the sequence of the working cylinder to be supplied with starting gas is engine-specifically determined in such a manner that the crank drive of the gas engine is not excited into natural vibration. The torsional characteristic of the crank drive can also be influenced with the starting method according to the invention. The sequence of the working cylinders to be supplied with starting gas one after the other is selected so that on the one hand as even as possible a torque curve is created and harmful torsional vibrations during the running-up of the crankshaft are avoided on the other hand.
According to another further development of the invention it is also provided that the sequence of the working cylinders to be supplied with starting gas following an abortion of the starting sequence of the gas engine is changed into a second sequence deviating from the selected sequence and the starting process repeated with the second sequence. Such a procedure can be advantageous when because of the ambient conditions of the gas engine, such as for example temperature and air humidity or other specific influence parameters starting of the gas engine has not proved successful or as a function of such changing parameters, different sequences of the working cylinders to be supplied with S 25 starting gas are advantageous. 3 N It was explained above that selected working cylinders are supplied with a I cylinder-specific starting gas quantity only when a successful ignition process has a © been detected in working cylinders previously supplied with starting gas. = 30 Detection of the completed ignition of a working cylinder takes place, according to = a further development of the invention, for example by means of detecting a N temperature increase in the exhaust gas port of the working cylinder and/or by means of detecting a pressure increase in the working cylinder.
For determining the completed ignition, a knocking sensor of a working cylinder can be used for example so that for carrying out the method according to the invention no additional sensor system has to be applied to the gas engine.
The method according to the invention is thus characterized in that the ignition of the gas engine does not take place with a uniform starting gas release to all cylinders simultaneously but that ignition gas is sequentially fed to specifically selected cylinders, i.e. to one or multiple working cylinders, and the release of starting gas for the following cylinders in the starting sequence takes place only after successful ignition detection of the already released cylinder sequences. Because of this, a mixture of gas from the working cylinders released for ignition with gas from working cylinders not yet supplied with starting gas is obtained in the exhaust tract, i.e. pure combustion air or exhaust gas from the already ignited working cylinders. The number of the working cylinders that are simultaneously released for ignition can be selected so that because of the mixture of the starting gas of working cylinders in the exhaust tract in the case of an ignition that is not successful with pure combustion air and/or exhaust gas from already ignited working cylinders, no ignitable gas mixture is present. For detecting of whether an ignition has already commenced in individual working cylinders, already existing sensors in the form for example of knocking sensors can also be employed so that the method according to the invention can be cost- S 25 effectively realised. Instead or additionally to the pressure detection sensors, s sensors for detecting the temperature in the working cylinder can also be N employed to determine if the starting process in the respective working cylinder I was successful. a
LO = 30 The determination of the ignition seguence of the working cylinders can for = example also include the torsional characteristic of the crank drive. The sequence N of the working cylinders supplied with starting gas one after the other is selected so that on the one hand as even as possible a torgue curve is created and on the other hand the torsional vibrations of the crank drive are maintained in the permissible range. Multiple alternative sequences can also be determined as ignition sequence which can be optionally used for starting the gas engine.
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Claims (9)
1. Amethod for starting a gas engine with more than one working cylinder, wherein the working cylinders are cylinder-selectively supplied with fuel gas and a starting gas quantity is fed to the working cylinders, wherein starting gas is cylinder-selectively fed to at least one working cylinder, characterized in that a working cylinder to be supplied with starting gas is engine-specifically determined as a function of the starting willingness of the working cylinder and/or of the angle of rotation position of the working cylinder relative to at least one further working cylinder and/or the position of the exhaust outlet of the working cylinder in the exhaust tract of the gas engine.
2. The method according to Claim 1, characterized in that at least two working cylinders are cylinder-selectively supplied with a predetermined quantity of starting gas.
3. The method according to Claim 1 or 2, characterized in that starting gas is fed to at least one further working cylinder only following detection of the completed ignition in at least one working cylinder.
4. The method according to any one of the preceding claims, characterized in that the starting gas quantity is determined so that in the exhaust tract of the gas S 25 engine no ignitable mixture is present. 3 N
5. The method according to any one of the preceding claims, characterized in that I the sequence of the working cylinders to be supplied with starting gas is engine- Lo specifically determined for bringing about a torque curve with amplitudes the = 30 amount of which is smaller than a predetermined amplitude amount.
6. The method according to any one of the preceding claims, characterized in that the seguence of the working cylinders to be supplied with starting gas is engine-
specifically determined in such a manner that the crank drive of the gas engine is not excited into a natural vibration.
7. The method according to any one of the preceding claims, characterized in that the sequence of the working cylinders to be supplied with starting gas following an abortion of the starting sequence of the gas engine is changed into a second sequence deviating from the sequence and the starting process repeated with the second sequence.
8 The method according to any one of the preceding claims, characterized in that the detection of the completed ignition of a working cylinder is carried out by means of detecting a temperature increase in the exhaust gas port of the working cylinder and/or by means of determining a pressure increase in the working cylinder.
9. The method according to Claim 8, characterized in that at least one knocking sensor of a working cylinder is used for determining the pressure increase.
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Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014016418.7A DE102014016418A1 (en) | 2014-11-05 | 2014-11-05 | Method for starting a gas engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI20155795A FI20155795A (en) | 2016-05-06 |
| FI129819B true FI129819B (en) | 2022-09-15 |
Family
ID=55803234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20155795A FI129819B (en) | 2014-11-05 | 2015-11-03 | Method for starting a gas engine |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6690921B2 (en) |
| KR (1) | KR102328552B1 (en) |
| CN (1) | CN105569858B (en) |
| DE (1) | DE102014016418A1 (en) |
| FI (1) | FI129819B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2569799B (en) * | 2017-12-22 | 2020-10-07 | Caterpillar Motoren Gmbh & Co | Method for starting a gaseous fuel combustion engine |
| DE102019100348A1 (en) * | 2019-01-09 | 2020-07-09 | Man Energy Solutions Se | Method and control device for operating a motor designed as a gas engine or dual-fuel engine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07116993B2 (en) * | 1986-08-29 | 1995-12-18 | スズキ株式会社 | Gas engine starter |
| JP2576753B2 (en) * | 1993-03-05 | 1997-01-29 | 株式会社新潟鉄工所 | Large gas engine |
| AUPO988597A0 (en) * | 1997-10-20 | 1997-11-13 | Orbital Engine Company (Australia) Proprietary Limited | Start-up method for an internal combustion engine |
| US6640773B2 (en) * | 2000-12-26 | 2003-11-04 | Westport Research Inc. | Method and apparatus for gaseous fuel introduction and controlling combustion in an internal combustion engine |
| DE102009016461A1 (en) * | 2009-04-04 | 2010-10-07 | Man Diesel Se | Ignition arrangement for gas engine utilized e.g., as marine engine, has ignition release device comprising ignition spark-production device that is arranged in pre-chamber for igniting ignition gas jet by ignition spark |
| AT506560B1 (en) * | 2009-05-07 | 2010-08-15 | Avl List Gmbh | METHOD FOR STARTING A COMBUSTION ENGINE POWERED BY INTERNAL COMBUSTION ENGINE |
| JP5802035B2 (en) * | 2011-03-28 | 2015-10-28 | 川崎重工業株式会社 | Gas engine and its starting method and starting device |
| JP5929795B2 (en) * | 2013-03-21 | 2016-06-08 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| JP6045424B2 (en) * | 2013-03-29 | 2016-12-14 | 三菱重工業株式会社 | Gas internal combustion engine starter |
-
2014
- 2014-11-05 DE DE102014016418.7A patent/DE102014016418A1/en active Pending
-
2015
- 2015-11-03 FI FI20155795A patent/FI129819B/en active IP Right Grant
- 2015-11-03 KR KR1020150153873A patent/KR102328552B1/en active IP Right Grant
- 2015-11-04 JP JP2015216493A patent/JP6690921B2/en active Active
- 2015-11-05 CN CN201510743224.6A patent/CN105569858B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP6690921B2 (en) | 2020-04-28 |
| CN105569858A (en) | 2016-05-11 |
| KR102328552B1 (en) | 2021-11-17 |
| JP2016089841A (en) | 2016-05-23 |
| FI20155795A (en) | 2016-05-06 |
| DE102014016418A1 (en) | 2016-05-12 |
| KR20160053802A (en) | 2016-05-13 |
| CN105569858B (en) | 2020-12-08 |
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