FI128173B - Internal combustion power machine system and method and control device for operating the same - Google Patents

Internal combustion power machine system and method and control device for operating the same Download PDF

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Publication number
FI128173B
FI128173B FI20155258A FI20155258A FI128173B FI 128173 B FI128173 B FI 128173B FI 20155258 A FI20155258 A FI 20155258A FI 20155258 A FI20155258 A FI 20155258A FI 128173 B FI128173 B FI 128173B
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FI
Finland
Prior art keywords
internal combustion
combustion engine
shut
combustion power
sensor
Prior art date
Application number
FI20155258A
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Finnish (fi)
Swedish (sv)
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FI20155258A (en
Inventor
Andreas Döring
Original Assignee
Man Diesel & Turbo Se
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Publication of FI20155258A publication Critical patent/FI20155258A/en
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Publication of FI128173B publication Critical patent/FI128173B/en

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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
    • F02D25/00—Controlling two or more co-operating engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B21/00—Combinations of two or more machines or engines
    • F01B21/02—Combinations of two or more machines or engines the machines or engines being all of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B25/00—Regulating, controlling, or safety means
    • F01B25/16—Safety means responsive to specific conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B25/00—Regulating, controlling, or safety means
    • F01B25/26—Warning devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust 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
    • F02B73/00—Combinations of two or more engines, not otherwise provided for
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D25/00—Controlling two or more co-operating engines
    • F02D25/04—Controlling two or more co-operating engines by cutting-out engines
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/107—More than one exhaust manifold or exhaust collector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A method for operating a internal combustion power machine system (10), wherein the internal combustion power machine system (10) comprises at least two internal combustion power machines (11, 12), in which fuel can be combusted subject to forming exhaust gas, and an exhaust gas after-treatment system (13) that is common to at least two internal combustion power machines (11, 12), in which the exhaust gas of the internal combustion power machines (11, 12) can be subjected to an exhaust gas after-treatmerit wherein downstream of at least one of the internal combustion power machines (11, 12), which are assigned a common exhaust gas after-treatment system (13), and upstream of the common exhaust gas after-treatment system (13) a shut-off device (14, 18) is arranged which in particular when the respective internal combustion power machine (11, 12) is stationary, is closed to avoid exhaust gas backflow from at least one other running internal combustion power machine (11, 12) in the directIon of the respective stationary internal combustion power machine (11, 12), wherein with the help of at least one sensor (16, 19) a gas composition and/or a gas temperature downstream of at least one stationary internal combustion power machine (11, 12) and upstream of the respective closed shut-off device (14, 18) is determined, and wherein dependent on this it is checked if there is exhaust gas backflow in the direction of the respective stationary machine (11, 12) despite closed shut-off device (14, 18),

Description

Internal combustion power machine system and method and control device for operating the same
The invention relates to a method for operating an internal combustion power machine system according to the preamble of claim 1. The invention furthermore relates to a control device for carrying out the method and to an internal combustion power machine system with such a control device.
On ships for example, internal combustion power machine systems are employed which comprise multiple internal combustion power machines and a common exhaust gas after-treatment system. Accordingly, fuel can be simultaneously combusted in such internal combustion power machine systems in multiple 15 internal combustion power machines subject to the creation of exhaust gas, wherein the exhaust gas of the internal combustion power machine is conducted via the common exhaust gas after-treatment system for exhaust gas aftertreatment.
In particular when such an internal combustion power machine system is operated in part load it is already known from practice to shut down at least one internal combustion power machine and merely operate at least one other internal combustion power machine. In order to prevent that with such a stationary internal combustion power machine of such an internal combustion power machine system 25 exhaust gas of the running internal combustion power machine flows back into the region of the stationary internal combustion power machine it is already known from practice to assign a shut-off device to at least such internal combustion power machines of the internal combustion power machine systems that can be shut down, with the help of which exhaust gas backflow in the direction of a stationary internal combustion power machine can be avoided. To this end, the respective shut-off device is then closed.
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20155258 prh 09 -04- 2015
In particular because of wearing of such shut-off devices a state can materialise during the operation of such an internal combustion power machine system in which in particular when an internal combustion power machine is stationary and 5 the shut-off device assigned to this internal combustion power machine is closed, exhaust gas backflow via the closed shut-off device nevertheless occurs. In this case, the exhaust gas then enters the region of the stationary internal combustion power machine as a result of which corrosion problems can occur in particular on assemblies of the stationary internal combustion power machine because of 10 precipitation of sulphuric acid. Up to now, no measures are known with the help of which exhaust gas backflow via a closed shut-off device assigned to a stationary internal combustion power machine can be securely and reliably detected.
Starting out from this, the present invention is based on the object of creating a 15 new type of method for operating an internal combustion power machine system, a control device for carrying out the method and an internal combustion power machine system having such a control device.
This object is solved through a method according to claim 1.
According to the invention, a gas composition and/or a gas temperature is determined downstream of at least one stationary internal combustion power machine and upstream of the closed shut-off device that is assigned to the respective stationary internal combustion power machine with the help of at least 25 one sensor, wherein dependent on this it is checked if there is exhaust gas backflow in the direction of the respective stationary internal combustion power machine despite closed shut-off device.
The present invention proposed for the first time a method for operating an internal 30 combustion power machine system with the help of which it can be securely and
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20155258 prh 09 -04- 2015 reliably detected if a closed shut-off device assigned to a stationary internal combustion power machine is leaking and there is consequently exhaust gas backflow in the direction of the respective stationary internal combustion power machine. Because of this it is possible upon detected exhaust gas backflow to 5 initiate countermeasures in order to avoid corrosion problems on the stationary internal combustion power machine.
In particular when there is exhaust gas backflow in the direction of an internal combustion power machine with closed shut-off device assigned to the respective 10 internal combustion power machine is present, a leak of the respective shut-off device is preferentially inferred and a measure, in particular an error message and/or measure for reducing the exhaust gas backflow triggered on the control side. The corrosion risk on a stationary internal combustion power machine can thereby be reduced.
According to an advantageous further development, exhaust gas backflow in the direction of an internal combustion power machine with closed shut-off device assigned to the respective internal combustion power machine is inferred in particular when an amount of a characteristic quantity detected with the help of the 20 sensor positioned between the respective stationary internal combustion power machine and the respective closed shut-off device amounts to at least X %, in particular at least 50 %, preferably at least 25 %, most preferably at least 10 % of an amount of a characteristic quantity detected with the help of a preferentially structurally identical sensor positioned downstream of the closed shut-off device or 25 downstream of another running internal combustion power machine. A particularly advantageous detection of exhaust gas backflow via a closed shut-off device in the direction of a stationary internal combustion power machine is thereby possible.
The control device is defined in claim 7 and the internal combustion power machine system in claim 8.
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Preferred further developments of the invention are obtained from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with the help of the drawing without being restricted to 5 this. There it shows:
20155258 prh 09 -04- 2015
Fig. 1: a diagram of a first internal combustion power machine system;
Fig. 2: a diagram of a second internal combustion power machine system;
Fig. 3: a diagram of a third internal combustion power machine system; and
Fig. 4: a signal flow diagram of the method for operating an internal combustion power machine system.
The present invention relates to a method for operating an internal combustion power machine system, to a control device for carrying out the method and to an 15 internal combustion power machine system.
Fig. 1 shows a diagram of a first internal combustion power machine system 10 according to the invention with two internal combustion power machines 11,12. The internal combustion power machines 11 and 12 shown in Figs. 1 and 2 are combustion engines, preferentially marine diesel combustion engines. It is pointed out here that the invention is not restricted to combustion internal combustion power machine systems, which utilise internal combustion engines. The invention can rather be employed also in internal combustion power machine systems the internal combustion power machines of which are designed as fluid flow machines 25 such as for example gas turbines or the like.
In the internal combustion power machines 11,12 of the internal combustion power machine system 10 fuel can be combusted subject to forming exhaust gas wherein the exhaust gas of the internal combustion power machines 11, 12 can be
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20155258 prh 09 -04- 2015 conducted via a common exhaust gas after-treatment system 13 for the exhaust gas after-treatment of the exhaust gas.
In the exemplary embodiment of Fig. 1, the internal combustion power machine 11 is assigned a shut-off device 14 which is positioned downstream of the internal combustion power machine 11 in order to decouple the internal combustion power machine 11 from the exhaust gas flow in particular when the internal combustion power machine 11 is shut down with running internal combustion power machine 12, thereby preventing a backflow of the exhaust gas of the running internal combustion power machine 12 in the direction of the stationary internal combustion power machine 11. This shut-off device 14 is typically a shut-off flap or the like. Fig. 1, furthermore, shows a control device 15 via which according to the dashed arrows of Fig. 1 the operation of the internal combustion power machines 11,12 can be controlled and/or regulated, and via which the shut-off device 14 can furthermore be closed and opened, namely dependent on whether the internal combustion power machine 11 is stationary or running. Accordingly, in particular when the internal combustion power machine 11 is stationary and the internal combustion power machine 12 is running, the shut-off device 14 assigned to the internal combustion power machine 11 is automatically closed via the control 20 device 15.
According to Fig. 1, a sensor 16 is arranged downstream of the internal combustion power machine 11, which in the exemplary embodiment of Fig. 1 can be shut down with running internal combustion power machine 12 and upstream of 25 the shut-off device 14 assigned to this internal combustion power machine 11 that can be shut down, with the help of which sensor 16 a gas composition and/or a gas temperature downstream of the stationary internal combustion power machine 11 and upstream of the closed shut-off device 14 can be determined.
Dependent on this it is checked if with running internal combustion power machine 12, with stationary internal combustion power machine 11 and with closed shut-off
6/16 device 14 there is exhaust gas backflow in the direction of the stationary internal combustion power machine 11 despite closed shut-off device 14. This check is automatically performed by the control device 15.
20155258 prh 09 -04- 2015
In particular when exhaust gas backflow in the direction of the stationary internal combustion power machine 11 with closed shut-off device 14 assigned to the stationary internal combustion power machine 11 is present or detected, a leakage of the shut-off device 14 is inferred on the control side and a measure triggered on the control side. This is for example an error message or a message in order to initiate maintenance or a replacement of the shut-off device 14. Alternatively or additionally, a measure can be triggered on the control side in order to reduce or avoid the exhaust gas backflow in the direction of the stationary internal combustion power machine. It is thus possible for example to put the previously shut down internal combustion power machine 11 into running and/or reduce the 15 power of the running internal combustion power machine 12.
As already explained above, the gas composition and/or the gas temperature is checked with the help of the sensor 16 downstream of the stationary internal combustion power machine 11 and upstream of the closed shut-off device 14 in 20 order to infer exhaust gas backflow via the closed shut-off device 14 in the direction of the stationary internal combustion power machine 11 based on the gas composition and/or the gas temperature. In particular when a characteristic quantity detected with the help of the sensor 16 is greater than a defined limit value will a backflow of exhaust gas via the closed shut-off device 14 in the 25 direction of the stationary internal combustion power machine 11 be inferred. This limit value can for example be permanently stored in the control device 15.
Fig. 2 shows a further development of the internal combustion power machine system 10 of Fig. 1, with which upstream of the exhaust gas after-treatment 30 system 13 and downstream of the shut-off device 14 a further sensor 17 is positioned, with the help of which a gas composition and/or a gas temperature
7/16 upstream of the exhaust gas after-treatment system 13 can be detected. The sensor 17 preferentially is a structurally identical sensor as the sensor 16 so that with the sensors 16 and 17 of Fig. 2 identical characteristic quantities, for example characteristic quantities regarding the gas composition and/or the gas temperature 5 can be detected.
20155258 prh 09 -04- 2015
In the exemplary embodiment of Fig. 2 it is provided that based on the characteristic quantity detected by the sensor 17 a limit value is dynamically determined based on which it is then detected on the control side if there is exhaust gas backflow via the closed shut-off device 14 with stationary internal combustion power machine 11. In the exemplary embodiment of Fig. 2 exhaust gas backflow via the closed shut-off device 14 in the direction of the stationary internal combustion power machine 11 is then preferentially detected with running internal combustion power machine 12, with stationary internal combustion power 15 machine 11 and with closed shut-off device 14 when an amount of the characteristic quantity X % detected by the sensor 16 amounts to in particular at least 50 %, preferably at least 25 %, most preferably at least 10 % of the amount of the same characteristic quantity detected with the help of the sensor 14. Expressed in other words this means that in Fig. 2 exhaust gas backflow via the closed shut-off device 14 in the direction of the stationary internal combustion power machine 11 is detected in particular with stationary internal combustion power machine 11 and with closed shut-off device 14 when a ratio between the characteristic quantity which is detected with the sensor 16 located upstream of the closed shut-off device 14 and the characteristic quantity, which is detected with the sensor 17 located downstream of the closed shut-off device 14 is greater than a limit value, that is greater than X %. This limit value can for example be loaddependent, i.e. dependent on the load with which the internal combustion power machine system is operated.
In the exemplary embodiment of Figs. 1 and 2 exclusively one of the shown internal combustion power machines 11,12 is assigned a shut-off device 14. Compared with this, Fig. 1 shows a further development of the internal combustion
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20155258 prh 09 -04- 2015 power machine system 10 of Fig. 1 in which the internal combustion power machine 12 is also assigned a shut-off device 18 and upstream of this shut-off device 18 and downstream of the internal combustion power machine 12 a sensor 19 for determining a gas composition and/or a gas temperature. The version of
Fig. 3 is preferred in particular when alternately both internal combustion power machines 11,12 of the internal combustion power machine system 10 can be shut down with the respective other internal combustion power machine running. Figs.
and 2 are then preferred when an internal combustion power machine is permanently running and the other internal combustion power machine is switched on in addition as required. With the version of Fig. 3 each of the internal combustion power machines 11,12 with the respective other internal combustion power machine 12,11 running can accordingly be shut down and the shut-off device 14 and 18 respectively assigned to the respective stationary internal combustion power machine 11 and 12 respectively be closed, wherein the tightness of the closed shut-off device 14 and 18 respective can then be checked with the help of the respective sensor 16 and 19 respectively. The other sensor 19 and 16 respectively preferentially of the same type assigned to the respective other internal combustion power machine in operation then serves for determining a limit value which when exceeded or reached a leakage of the shut-off device 14 and 18 respectively assigned to this internal combustion power machine is inferred in the signal of the sensor assigned to the stationary internal combustion power machine.
As already explained, the sensors 16,17,19 are sensors for determining a gas composition and/or a gas temperature. As sensors, lambda sensors and/or NOxsensors and/or HC-sensors and/or NHa-sensors and/or CO-sensors or and/or CO2-sensors or temperature sensors or exhaust gas particle sensors and/or other sensors can be preferentially employed.
Fig. 4 shows a signal flow diagram of the method according to the invention for operating an internal combustion power machine system according to the
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20155258 prh 09 -04- 2015 invention, wherein the block 20 of Fig. 4 visualises the start of the method according to the invention.
In a block 21 it is checked if one of the internal combustion power machines of an internal combustion power machine system, which is assigned a common exhaust gas after-treatment system, is stationary and if another internal combustion power machine, which utilises the same exhaust gas after-treatment system, is running. If this is not the case, the method loops back to block 21. If this, by contrast, is not the case, i.e. if at least one of the internal combustion power machines of the internal combustion power machine system which is assigned a common exhaust gas after-treatment system is stationary while another internal combustion power machine of the internal combustion power machine system is running, the method branches out from block 21 to block 22.
In the block 22 the signal of the sensor which is assigned to the stationary internal combustion power machine of the internal combustion power machine system is evaluated. In a following block 23 it is checked if the signal or the characteristic quantity of the sensor which is assigned to the stationary internal combustion power machine of the internal combustion power machine system exceeds a limit 20 value.
If this is not the case, the method loops back starting out from block 23 to block
23. If by contrast the limit value is reached or exceeded, the method branches out from block 23 to block 24 and a method is initiated on the control side, for example 25 an error message.
Following this, the method according to the invention is terminated in block 25.
Accordingly, according to the invention, a gas composition and/or a temperature downstream of at least one stationary internal combustion power machine and
10/16 upstream of the closed shut-off device 14 and 18 respectively assigned to the respective stationary internal combustion power machine is determined with the help of at least one sensor 16 and 19 respectively, wherein dependent on the signal of this sensor it is checked in the control device 15 if there is exhaust gas 5 backflow in the direction of the respective stationary internal combustion power machine despite closed shut-off device.
This method is carried out by the control device 15 in an automated manner, which accordingly comprises means for carrying out the method according to the invention. These means of the control device 15 are data interfaces, which serve for the data exchange with the assemblies involved in carrying out the method according to the invention, for example with the sensor 16 and 17 and 19 respectively, a processor for processing data and a storage unit for storing data.
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LO
CM
CO LO CM LO LO
CM
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List of reference numbers
Interna! combustion power machine system
Internal combustion power machine
Internal combustion power machine
Exhaust gas after-treatment system
Shut-off device
Control device
Sensor
Sensor
Shut-off device
Sensor
Block
Block
Block
Block
Block
Block
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20155258 prh 09 -04- 2015

Claims (9)

1. Menetelmä polttovoimakonejärjestelmän (10) käyttämiseksi, jolloin polttovoimakonejärjestelmä (10) käsittää vähintään kaksi polttomoottorikonetta (11, 12), joissa on poltettavissa polttoainetta pakokaasun muodostami-A method for operating a combustion engine system (10), wherein the combustion engine system (10) comprises at least two internal combustion engine machines (11, 12) having combustible fuel to form the exhaust gas. 5 seksi, ja vähintään kahdelle polttomoottorikoneelle (11, 12) yhteinen pakokaasunjälkikäsittelylaitteisto (13), jossa polttomoottorikoneiden (11, 12) pakokaasulle on suoritettavissa pakokaasunjälkikäsittely, jolloin alavirtaan ainakin yhdestä mainituista polttovoimakoneista (11, 12), joille on järjestetty yhteinen pakokaasunjälkikäsittelylaitteisto (13), ja ylävirtaan yhteisestä pakokaasunjälkikä10 sittelylaitteistosta (13) on järjestetty sulkulaite (14, 18), joka silloin, kun kyseessä oleva polttomoottorikone (11, 12) on pysäytettynä, suljetaan estämään pakokaasun takaisinvirtaus vähintään yhdestä muusta käynnissä olevasta polttomoottorikoneesta (11, 12) kyseessä olevan pysäytetyn polttovoimakoneen (11, 12) suuntaan, tunnettu siitä, että ainakin yhden sensorin (16, 19) 15 avulla määritellään kaasun koostumus ja/tai kaasun lämpötila alavirtaan vähintään yhdestä pysäytettynä olevasta polttovoimakoneesta (11, 12) ja ylävirtaan kyseessä olevasta suljetusta sulkulaitteesta (14, 18), ja tästä riippuen tarkistetaan, tapahtuuko pakokaasun takaisinvirtausta kyseessä olevan pysäytettynä olevan polttovoimakoneen (11, 12) suuntaan suljetusta sulkulaitteesta (14, 18) 20 huolimatta.5, and an exhaust after-treatment device (13) common to at least two internal combustion engine machines (11, 12), wherein an exhaust after-treatment can be performed on the exhaust gas of the internal combustion engine machines (11, 12), downstream of at least one , and upstream of the common exhaust after-treatment device 10 (13) is provided a shut-off device (14, 18) which, when the internal combustion engine (11, 12) in question is stopped, is closed to prevent exhaust backflow from at least one other in the direction of a stopped combustion engine (11, 12), characterized in that at least one sensor (16, 19) 15 determines the gas composition and / or the gas temperature downstream of at least one of the stopped combustion engines (11, 12) and upstream and, depending on this, it is checked whether the exhaust gas backflows in the direction of the stopping combustion engine (11, 12) in question, despite the closed shut-off device (14, 18) 20. 2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että kun tapahtuu pakokaasun takaisinvirtausta kyseessä olevan pysäytettynä olevan polttovoimakoneen (11, 12) suuntaan kyseessä olevalle polttovoimakoneelle järjestetyn sulkulaitteen (14, 18) ollessa suljettu, todetaan kyseessä ole-Method according to Claim 1, characterized in that, when the exhaust gas backflow in the direction of the stopping combustion engine (11, 12) in question, with the shut-off device (14, 18) arranged on the combustion engine in question, is closed, 25 van sulkulaitteen (14, 18) vuoto, ja ohjauspuolella tehdään toimenpide, erityisesti virheilmoitus ja/tai toimenpide pakokaasun takaisinvirtauksen vähentämiseksi.There is a leakage of the 25 shut-off device (14, 18) and action is taken on the control side, in particular an error message and / or action to reduce exhaust backflow. 3. Patenttivaatimuksen 1 tai 2 mukainen menetelmä, tunnettu siitä, että alavirtaan kustakin polttovoimakoneesta (11, 12) on sijoitettu sulku-Method according to Claim 1 or 2, characterized in that downstream of each of the combustion engines (11, 12) is arranged a shut-off device. 30 laite (14, 18), joka silloin, kun kyseessä oleva polttovoimakone on pysäytettynä, suljetaan, ja että alavirtaan kustakin polttovoimakoneesta ja ylävirtaan kustakin sulkulaitteesta on kulloinkin sijoitettu vähintään yksi sensori (16, 19), jonka avulla jokaista polttovoimakonetta varten määritetään yksilöllisesti kaasun koostumus ja/tai kaasun lämpötila alavirtaan kyseessä olevasta pysäytettynä 35 olevasta polttovoimakoneesta ja ylävirtaan kyseessä olevasta suljetusta sulkulaitteesta.A device (14, 18) which is closed when the combustion engine in question is stopped, and that at least one sensor (16, 19) is disposed downstream of each combustion engine and upstream of each of the shuttering means to individually determine the gas composition for each combustion engine. and / or the gas temperature downstream of the stopping combustion machine in question and upstream of the closed shut-off device in question. 20155258 prh 09 -04- 201520155258 prh 09 -04- 2015 4. Jonkin patenttivaatimuksen 1 - 3 mukainen menetelmä, tunnettu siitä, että todetaan pakokaasun takaisinvirtaus pysäytettynä olevan polttovoimakoneen (11, 12) suuntaan, kun kyseessä olevalle polttovoimakoneelle järjestetty sulkulaite (14, 18) on suljettuna, jos kyseessä olevan poltto-Method according to one of Claims 1 to 3, characterized by detecting the exhaust gas backflow in the direction of the stopped combustion engine (11, 12) when the shut-off device (14, 18) provided for the said combustion engine is closed, 5 voimakoneen (11, 12) ja kyseessä olevan sulkulaitteen (14, 18) väliin sijoitetun sensorin (16, 19) avulla mitattu tunnusomainen suure on suurempi kuin rajaarvo.5, the characteristic quantity measured by means of a sensor (16, 19) placed between the actuator (11, 12) and the shut-off device (14, 18) in question is greater than the limit value. 5. Jonkin patenttivaatimuksen 1 - 4 mukainen menetelmä, tunnettu siitä, että todetaan pakokaasun takaisinvirtaus pysäytettynä olevanMethod according to one of Claims 1 to 4, characterized in that the exhaust gas backflow is stopped. 10 polttovoimakoneen (11, 12) suuntaan, kun kyseessä olevalle polttovoimakoneelle järjestetty sulkulaite (14, 18) on suljettuna, jos kyseessä olevan polttovoimakoneen ja kyseessä olevan sulkulaitteen väliin sijoitetun sensorin (16, 19) avulla mitatun tunnusomaisen suureen arvo on vähintään 50%, edullisesti vähintään 25%, erityisesti edullisesti vähintään 10% tunnusomaisen suureen 15 arvosta, joka on mitattu edullisesti rakenteellisesti samanlaisen, alavirtaan suljetusta sulkulaitteesta (14, 18) tai alavirtaan toisesta, käynnissä olevasta polttovoimakoneesta (11, 12) sijoitetun anturin (17, 16, 19) avulla.10 in the direction of the combustion engine (11, 12) when the shut-off device (14, 18) provided for the respective power plant is closed, if the characteristic value measured by means of the sensor (16, 19) disposed between the at least 25%, particularly preferably at least 10%, of the characteristic quantity 15 measured preferably from a structurally similar sensor (17, 16, 19) located downstream of the closed shut-off device (14, 18) or other running combustion engine (11, 12). through. 6. Jonkin patenttivaatimuksen 1 - 5 mukainen menetelmä, tunnettu siitä, että kyseessä oleva sensori (16, 17, 19) on muodostettu Lamb-Method according to one of Claims 1 to 5, characterized in that the sensor (16, 17, 19) in question is formed by a Lamb 20 da-sensoriksi ja/tai ΝΟχ-sensoriksi ja/tai HC-sensoriksi ja/tai NH3-sensoriksi ja/tai CO-sensoriksi ja/tai CO2-sensonksi ja/tai lämpötilasensoriksi ja/tai pakokaasupartikkelisensoriksi.20 da-sensor and / or ΝΟχ-sensor and / or HC-sensor and / or NH- 3 sensor and / or CO-sensor and / or CO2 sensor and / or temperature sensor and / or exhaust particle sensor. 7. Ohjauslaite (15) polttovoimakonejärjestelmää (10) varten, tunnettu siitä, että siinä on välineet jonkin patenttivaatimuksen 1 - 6 mukaisenControl device (15) for a combustion engine system (10), characterized in that it comprises means according to one of claims 1 to 6. 25 menetelmän suorittamiseksi.25 method. 8. Polttovoimakonejärjestelmä (10), joka käsittää vähintään kaksi polttomoottorikonetta (11, 12), joissa on poltettavissa polttoainetta pakokaasun muodostamiseksi, ja vähintään kahdelle polttomoottorikoneelle yhteinen pakokaasunjälkikäsittelylaitteisto (13), jossa polttomoottorikoneiden pakokaasulleA combustion engine system (10) comprising at least two combustion engine units (11, 12) having combustible fuel for generating exhaust gas and an exhaust after-treatment system (13) common to at least two internal combustion engine units, wherein 30 on suoritettavissa pakokaasunjälkikäsittely, jolloin alavirtaan ainakin yhdestä mainituista polttovoimakoneista, joille on järjestetty yhteinen pakokaasunjälkikäsittelylaitteisto, ja ylävirtaan yhteisestä pakokaasunjälkikäsittelylaitteistosta on järjestetty sulkulaite (14, 18), joka on suljettavissa pakokaasun takaisinvirtauksen estämiseksi kyseessä olevan polttovoimakoneen suuntaan, ja ohjaus35 laitteen (15) polttovoimakoneiden käytön ohjaamiseksi ja/tai säätämiseksi, tunnettu siitä, että kyseessä olevan polttovoimakoneen ja kyseessä olevan sulkulaitteen välille on sijoitettu vähintään yksi sensori (16, 19), jonka avulla on määritettävissä kaasun koostumus ja/tai kaasun lämpötila alavirtaan kyseessä olevasta polttovoimakoneesta ja ylävirtaan kyseessä olevasta suljetusta sulkulaitteesta, jolloin ohjauslaite (15) tästä tarkistaa, tapahtuuko pakokaasun ta5 kaisinvirtausta kyseessä olevan pysäytettynä olevan polttovoimakoneen suuntaan suljetusta sulkulaitteesta huolimatta.30 can be performed downstream of at least one of said combustion engines provided with a common exhaust after-treatment apparatus, and upstream of the common exhaust after-treatment apparatus a shut-off device (14, 18) is operable to shut off the drive for controlling and / or adjusting, characterized in that at least one sensor (16, 19) is disposed between said combustion engine and said shut-off device to determine gas composition and / or gas temperature downstream of said combustion engine and upstream of said closed shut-off device. whereby the control device (15) checks whether the exhaust gas ta5 is flowing in the direction of the stopping combustion engine in question, despite the shut-off device. 9. Patenttivaatimuksen 8 mukainen polttovoimakonejärjestelmä, tunnettu siitä, että ohjauslaite (15) on muodostettu patenttivaatimuksen 7 mukaisesti.Combustion engine system according to claim 8, characterized in that the control device (15) is formed according to claim 7.
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