CN106640293A - Marine diesel engine SCR control system - Google Patents
Marine diesel engine SCR control system Download PDFInfo
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- CN106640293A CN106640293A CN201611240540.2A CN201611240540A CN106640293A CN 106640293 A CN106640293 A CN 106640293A CN 201611240540 A CN201611240540 A CN 201611240540A CN 106640293 A CN106640293 A CN 106640293A
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- control module
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Classifications
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- Y02T10/12—Improving ICE efficiencies
-
- 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
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a marine diesel engine SCR control system. A Siemens S7-300 PLC serves as a controller, and the marine diesel engine SCR control system comprises an initialization function module, a main recycling function module and a recycling interruption function module. The initialization function module stores parameters initialized before the system is started; the main recycling function module comprises a machine side control module, a central control room control module, an alarm fault processing module and a halt processing module; and the machine side control module manually controls a waste gas inlet valve and a bypass-valve and controls the injection quantity of urea beside a machine, the central control room control module achieves switching between manual control and automatic control and controls injection of the urea in a central control room, the alarm fault processing module gives out an alarm on the analog quantity higher than the upper limit or lower than the lower limit, and the halt processing module executes a halt instruction after the alarm is given out. The recycling interruption function module comprises an analog quantity processing module and an upper computer monitoring frame dynamic module, wherein the analog quantity processing module changes a sampling value into an engineering value of the original dimension and stores the value, and the upper computer monitoring frame dynamic module achieves dynamic display of monitoring frames under different modes. The urea injection quality is adjusted according to different working conditions of a main engine so that the NOx content in diesel engine tail gas can meet the TIER III requirement.
Description
Technical field
The present invention relates to after high-power diesel engine booster SCR system control, and in particular to a kind of marine diesel SCR
Control system, belongs to Diesel Engine Technique Field.
Background technology
Marine diesel SCR control system mainly completes the control to urea injection system in SCR system.
PLC (programmable logic controller (PLC)) is widely used in automatic control system, and major domain has：Switching value logic control
System, motion control, closed loop procedure control, data processing, connected network communication etc..
Siemens (siemens) PLC products are normalized, seriation, modularization, equipped with the various hard of great variety of goods
Part device is selected for user, and user can flexibly carry out system configuration, constitutes difference in functionality, the automated system of different scales,
There is stronger carrying load ability, magnetic valve and contactor can be directly driven.
SIEMENS PLC function is strong, cost performance is high, reliability is high, strong antijamming capability, easy to maintenance, construction cycle are short.
The content of the invention
It is an object of the present invention to provide a kind of marine diesel SCR control system, is made using Siemens S7-300 PLC
For controller, urea injection system is automatically controlled, according to the different operating mode of main frame, adjust urea injecting quantity, make diesel engine vent gas
Middle NOx content meets TIER III requirements.
For achieving the above object, technical solution of the invention is as follows：
A kind of marine diesel SCR control system, includes：
Function of initializing module, the parameter of storage system required system initialization before starting, performs in system electrification
Once, the parameter value wherein deposited is set to into designated value；
Major cycle functional module, including on-site control module, centralized-control module, alarm failure processing module and shutdown
Processing module, wherein：
The on-site control module is realized controlling exhaust gas inlet valve and by-passing valve manually by machine, manually the spray of control urea
The amount of penetrating, including manual control submodule, the manual control submodule includes valve control module and urea injecting quantity control module, institute
State valve control module control exhaust gas inlet valve and by-passing valve reaches corresponding aperture, the urea injecting quantity control module control meter
Amount pump sprays corresponding urea amount；
The centralized-control module central station of floating dock realize manually with the switching for automatically controlling, control urea injection, bag
Manual control module and automatic control module are included, the opening/closing of beating that the manual control module process man-machine interface sends refers to
Order and valve opening instruction, and the aperture specified is reached by valve control module control exhaust gas inlet valve and by-passing valve, it is described
Automatic control module includes TierII modules, prepares TierIII modules and TierIII modules, and the TierII resume modules are come
From the request instruction of man-machine interface, make display device reach the state of TierII requirements, and controlled by the valve control module
Exhaust gas inlet valve and by-passing valve reach the aperture specified, and the preparation TierIII resume modules refer to from the request of man-machine interface
Order, reaches relevant device and prepares the state that TierIII is required, and controls exhaust gas inlet valve and side by the valve control module
Port valve reaches the aperture specified, and the TierIII resume modules reach relevant device from the request instruction of man-machine interface
The state that TierIII is required, and read urea injecting quantity signal；
The alarm failure processing module is set to the numerical value for exceeding alarm limit the flag bit of corresponding upper and lower bound,
To being higher by the upper limit or reporting to the police less than the analog quantity of lower limit；
The shutdown processing module performs halt instruction after analog quantity exceeds alarm limit, makes the exhaust gas inlet valve and side
Port valve reaches home and stops urea injection；
Cycle interruption functional module, including analog quantity processing module and host computer monitored picture mobilism module, its
In：
The sampled value obtained by digital filtering is transformed to the engineering value of commercial weight guiding principle by the analog quantity processing module, and is stored up
Deposit the data after conversion；
The host computer monitored picture mobilism module realizes the Dynamic Announce of monitored picture under different mode.
Further, described manual control submodule processes the operational order from touch-screen, and valve opening is referred to
Order is sent to the valve control module, and urea injecting quantity instruction is sent to into the urea injecting quantity control module.
Further, described TierIII modules include urea open loop emitted dose submodule and urea injecting quantity submodule,
The urea injecting quantity submodule reads load-urea injecting quantity curve and determines current desired wanting according to current hosts load
Urea amount, the urea open loop emitted dose submodule calculates urea injecting quantity signal.
Further, described alarm failure processing module adopts sound and light alarm pattern, dodges when failure Times warning lamp is produced
It is bright, buzzer rings；When push for emergency response button after, alarm lamp Chang Liang, buzzer close；Alarm lamp puts out after Failure elimination
Go out.
Further, described SCR control system adopts Siemens S7-300 PLC as controller.
Compared with prior art, the invention has the beneficial effects as follows：
1st, the SCR control system employs modular program structure, and broken down into program is become into some sub-function modules,
This is not only convenient for the understanding and programming of program, and the lookup of the Function Extension and failure for facilitating implementation program is excluded.
2nd, using Siemens S7-300 PLC as controller, with function it is strong, cost performance is high, reliability is high, anti-interference energy
The advantages of power is strong, easy to maintenance, the construction cycle is short.
3rd, realize as the change of main unit load changes the emitted dose of urea automatically, so as to reduce waste gas in NOx contain
Amount, meets the requirement of Tier III Abgasgesetzs.
Description of the drawings
Fig. 1 is the principle schematic diagram. of the present invention.
Specific embodiment
The present invention is directed to SCR system after high-power low-speed diesel booster and is designed, and it controls rising for SCR system
The automatic/hand opening and closing of dynamic and stopping, model selection, the manual/auto injection of urea, exhaust gas inlet valve and by-passing valve,
The function such as warning and fault diagnosis.
The marine diesel SCR control system is touched using Siemens S7-300 series of PLC and Wan Ke (Wago) PLC
Using Siemens TP1200 essence intelligence panels, host computer adopts Siemens's industrial computer, controller and touch-screen to adopt to screen
Portal V12 software programmings, ipc monitor adopts Wincc V7.0 configuration softwares；Embody Siemens's Integrated automation
Theory.
S7-300 series of PLC can realize the main control function of SCR system, ten thousand can PLC be used for the CAN of NOx sensor
Bus communication.
Next with specific embodiment below in conjunction with the accompanying drawings the present invention is described in further detail, but can not therefore limit
Protection scope of the present invention processed.
Refer to Fig. 1, it is illustrated that marine diesel SCR control system using Siemens S7-300 PLC as controller, including
There are function of initializing module OB100, major cycle functional module OB1 and cycle interruption functional module OB35.It is respectively described below：
1st, function of initializing module OB100
The parameter of function of initializing module OB100 storage system required system initialization before starting, in system electrification
Perform once, the parameter value wherein deposited is set to into designated value.
2nd, major cycle functional module OB1
Main control function, including four functional modules are deposited in major cycle functional module 0B1：Centralized-control function
Module, on-site control functional module, alarm failure processing module FC10 and shutdown process functions of modules module FC11.
Centralized-control module is divided into manual control module FC3 and automatic control module FC2.The work(of centralized-control module
Can be manually or automatically to control exhaust gas inlet valve, by-passing valve in central station of floating dock, realize the switching of manual/auto control, control urea
Injection.
Manual control module FC3 includes valve control module, and what manual control module FC3 process man-machine interface sent beats
Opening/closing is instructed and valve opening instruction, and is sent to valve control module, and valve control module control exhaust gas inlet valve, by-passing valve make
It reaches the aperture specified.
Automatic control module FC2 includes TierII modules FC7, prepares TierIII modules FC8, TierIII module FC9 tri-
Individual functional module.The process of TierII modules FC7 makes display device reach TierII requirements from the request instruction of man-machine interface
State, and send a signal to valve control module, valve control module control exhaust gas inlet valve, by-passing valve reach opening of specifying
Degree；Prepare request instruction of the TierIII modules FC8 process from man-machine interface, make relevant device reach preparation TierIII and require
State, and send a signal to valve control module, valve control module control exhaust gas inlet valve, by-passing valve reach opening of specifying
Degree；The process of TierIII modules FC9 makes relevant device reach the state of TierIII requirements from the request instruction of man-machine interface,
Including urea open loop emitted dose submodule FC5 and urea injecting quantity submodule FC6, TierIII modules FC9 read urea open loop spray
The urea injecting quantity signal that quantum module FC5 is calculated is penetrated, urea injecting quantity submodule FC6 reads according to current hosts load
Load-urea injecting quantity curve, determines the current desired urea amount wanted.
The function of on-site control module is to control exhaust gas inlet valve, by-passing valve manually by machine, control urea injection manually
Amount, including manual control submodule FC4.Manual control submodule FC4 includes valve control module and urea injecting quantity control module,
Manual control submodule FC4 processes the operational order from touch-screen, and valve opening instruction is sent to into valve control module, will urinate
Plain emitted dose instruction is sent to urea injecting quantity control module.Valve control module control exhaust gas inlet valve, by-passing valve are reached
Corresponding aperture, urea injecting quantity control module control measuring pump sprays corresponding urea amount.
Alarm failure processing module FC10 is to being higher by the upper limit or carrying out bound less than the analog quantity of lower limit after scale conversion
Report to the police.Numerical value more than alarm limit is set to corresponding flag bit.Alert process program is faulty using sound and light alarm control
During generation, alarm lamp flicker, buzzer rings.After alarm response button is pressed, alarm lamp Chang Liang, while alarm buzzer is closed
Close.Alarm lamp goes out after Failure elimination.
Shut down and process functional module FC11, after safe range, shutdown is processed simulation numerical quantity after scale conversion
Functional module FC11 can perform halt instruction, make respective valves reach home, and stop urea injection.
3rd, cycle interruption functional module OB35
Requirement of real-time height is deposited in cycle interruption functional module OB35 and has certain functional module for performing frequency requirement,
Including analog quantity processing module FC1 and host computer monitored picture mobilism module.
Analog quantity processing module FC1 includes scale conversion module FC105 and scale conversion module FC106.By numeral filter
The efficiently sampling value that ripple is obtained, tends not to directly use, it is necessary to converts it into ability computing after the engineering value of commercial weight guiding principle, show
Show, report to the police.Analog quantity processing module FC1 calls scale conversion module FC105 and scale conversion module FC106 to carry out scale change
Change, and the data after scale conversion are stored in scale conversion data block.
Host computer monitored picture mobilism module, SCR system under different mode of operations, upper monitoring computer
It is different that the system mode of mobilism shows, the host computer monitored picture mobilism module is realized being monitored under different mode
The Dynamic Announce of picture.
The signal output and transitive relation of each intermodule of the SCR control system is as follows：
Function of initializing module OB100：Switch indication light mode bit, valve location analog quantity initial value.
Major cycle functional module OB1：Control position, operational mode state position, urea injecting quantity, warning, stopping signal.
Centralized-control module：Automatic/hand state of a control position, mode state position, urea injecting quantity.
Manual control module FC3：Manual state of a control position, valve position signal.
Valve control module：Valve position and feedback signal.
Automatic control module FC2：Automatic control state position, mode state position, urea injecting quantity.
TierII modules FC7：TierII operational mode states position, valve position signal.
Valve control module：Valve position set point and feedback signal.
Prepare TierIII modules FC8：Prepare TierIII operational mode states position, valve position signal.
Valve control module：Valve position set point and feedback signal.
TierIII modules FC9：TierIII operational mode states position, urea injecting quantity.
Urea open loop emitted dose submodule FC5：Urea injecting quantity.
Urea injecting quantity submodule FC6：MAP.
On-site control module：Manual state of a control position, valve setpoint point, urea injecting quantity.
Manual control submodule FC4：Valve setpoint point, urea injecting quantity.
Valve control module：Valve position set point and feedback signal.
Urea injecting quantity control module：Urea injecting quantity.
Alarm failure processing module FC10：Alarm signal.
Shut down processing module FC11：Stopping signal.
Cycle interruption functional module OB35：The analog signalses such as EGT, pressure, host computer state of a control position.
Analog quantity processing module FC1：The analog signalses such as EGT, pressure.
Scale conversion module FC105：The actual measured value of sensor collection.
Scale conversion module FC106：To the setting value of actuator.
Host computer monitored picture mobilism module：Host computer state of a control position.
The marine diesel SCR control system needs to be communicated with engine control system, gathers main unit load signal,
Communicated with urea metering injection system simultaneously, according to the difference of main unit load, adjust automatically urea injecting quantity, made main frame tail
NOx content meets TIER III requirements in gas.
The system control position can be changed by machine and host computer between.In PC control interface, it is elected to
When selecting TIER II patterns, control system control reactor by-passing valve is opened, and inlet valve and outlet valve are closed.When selection prepares
During TIER III, inlet valve and outlet valve are slowly opened, and after two valves are all fully opened, by-passing valve is slowly closed, and is now given
Catalyst is heated, and after catalyst temperature reaches requirement, if selecting TIER III patterns, urea starts injection.If again
TIER II patterns are selected, by-passing valve is slowly opened, and after fully opening, inlet valve and outlet valve are slowly closed.When valve is manual
Under pattern, valve opening can be manually entered, make valve reach specified location.Equally in on-site control, it is also possible to complete
State control function.
Can be with real-time monitoring system state, such as main unit load, urea injection system state, SCR system in man-machine interface
Present mode, valve opening, NOx concentration, NOX conversion efficiency etc..Each channel status of hardware can be monitored.
System has reports to the police and security function.When key parameter reaches alarm limits, triggering is reported to the police, and has indicator lamp by machine
Show, while warning message occurs in host computer.When key parameter reaches security limit value, TIER II patterns are automatically switched to.
System has certain fault diagnosis functions, the reason for being broken down with simple analysis when a failure occurs, and
Show analysis result.
The opened loop control mistake of the urea liquid emitted dose realized using marine diesel SCR control system of the present invention
Journey is as follows：
1) in a manual mode, the value of urea injecting quantity is constantly manually adjusted according to the load signal of engine, until
SCR reactor outlet nitrous oxides concentrations reach requirement, 0%, 25%, 50%, 75%, 100% are determined respectively, 110% load
Required urea amount.
2) urea amount needed for each load point is input in the MAP that PLC is finished in advance.
3) under TierIII patterns, PLC reads engine load signal, according to load-urea amount MAP curves, by urea
Emitted dose is converted to 4-20mA signal outputs and makes its corresponding urea of output to urea metering units, control urea metering revolution speed
Amount.
It is above presently preferred embodiments of the present invention, for persons skilled in the art, without departing substantially from of the invention former
To any obvious equivalent or equivalent modifications done by it on the premise of reason and spirit, this should be all contemplated as falling with
Within invention scope of the claims.
Claims (5)
1. a kind of marine diesel SCR control system, it is characterised in that：Include：
Function of initializing module, the parameter of storage system required system initialization before starting, performs once in system electrification,
The parameter value wherein deposited is set to into designated value；
Major cycle functional module, including on-site control module, centralized-control module, alarm failure processing module and shutdown process
Module, wherein：
The on-site control module is realized controlling exhaust gas inlet valve and by-passing valve manually by machine, manually the injection of control urea
Amount, including manual control submodule, the manual control submodule includes valve control module and urea injecting quantity control module, described
Valve control module controls exhaust gas inlet valve and by-passing valve reaches corresponding aperture, the urea injecting quantity control module control metering
Pump sprays corresponding urea amount；
The centralized-control module central station of floating dock realize manually with the switching for automatically controlling, control the injection of urea, including hand
Dynamic control module and automatic control module, the manual control module process opening/out code that man-machine interface sends and
Valve opening is instructed, and reaches the aperture specified by valve control module control exhaust gas inlet valve and by-passing valve, described automatic
Control module includes TierII modules, prepares TierIII modules and TierIII modules, and the TierII resume modules are from people
The request instruction at machine interface, makes display device reach the state of TierII requirements, and controls waste gas by the valve control module
Inlet valve and by-passing valve reach the aperture specified, and the preparation TierIII resume modules make from the request instruction of man-machine interface
Relevant device reaches and prepares the state that TierIII is required, and controls exhaust gas inlet valve and by-passing valve by the valve control module
The aperture specified is reached, the TierIII resume modules reach relevant device from the request instruction of man-machine interface
The state that TierIII is required, and read urea injecting quantity signal；
The alarm failure processing module is set to the numerical value for exceeding alarm limit the flag bit of corresponding upper and lower bound, to height
Go out the upper limit or reported to the police less than the analog quantity of lower limit；
The shutdown processing module performs halt instruction after analog quantity exceeds alarm limit, makes the exhaust gas inlet valve and by-passing valve
Reach home and stop urea injection；
Cycle interruption functional module, including analog quantity processing module and host computer monitored picture mobilism module, wherein：
The sampled value obtained by digital filtering is transformed to the engineering value of commercial weight guiding principle by the analog quantity processing module, and stores change
Data after changing；
The host computer monitored picture mobilism module realizes the Dynamic Announce of monitored picture under different mode.
2. marine diesel SCR control system according to claim 1, it is characterised in that：Described manual control submodule
Block processes the operational order from touch-screen, and valve opening instruction is sent to into the valve control module, by urea injecting quantity
Instruction is sent to the urea injecting quantity control module.
3. marine diesel SCR control system according to claim 1, it is characterised in that：Described TierIII module bags
Urea open loop emitted dose submodule and urea injecting quantity submodule are included, the urea injecting quantity submodule is according to current hosts load
Read load-urea injecting quantity curve and determine the current desired urea amount wanted, the urea open loop emitted dose submodule is calculated
Go out urea injecting quantity signal.
4. marine diesel SCR control system according to claim 1, it is characterised in that：Described alarm failure is processed
Module adopts sound and light alarm pattern, flashes when failure Times warning lamp is produced, buzzer rings；When push for emergency response button after,
Alarm lamp Chang Liang, buzzer is closed；Alarm lamp extinguishes after Failure elimination.
5. marine diesel SCR control system according to claim 1, it is characterised in that：Described SCR control system is adopted
With Siemens S7-300 PLC as controller.
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| CN108415265A (en) * | 2018-01-26 | 2018-08-17 | 青岛双瑞海洋环境工程股份有限公司 | Marine exhaust denitration functional simulation analogue system |
| CN108415265B (en) * | 2018-01-26 | 2021-04-30 | 青岛双瑞海洋环境工程股份有限公司 | Ship exhaust gas denitration function analog simulation system |
| CN108170090A (en) * | 2018-03-13 | 2018-06-15 | 中国船舶电站设备有限公司 | A kind of SCR state monitoring devices |
| CN108888882A (en) * | 2018-05-23 | 2018-11-27 | 武汉船用机械有限责任公司 | A kind of Diesel Driven propeller control system and its control method |
| CN109459967A (en) * | 2018-12-27 | 2019-03-12 | 凯龙高科技股份有限公司 | A kind of SCR safe control system peculiar to vessel |
| US11268414B2 (en) | 2019-12-03 | 2022-03-08 | Faurecia Emissions Control Technologies, Usa, Llc | Exhaust aftertreatment component with bypass valve |
| CN111794837A (en) * | 2020-07-06 | 2020-10-20 | 无锡沃尔福汽车技术有限公司 | Urea injection control system and method |
| CN112610310A (en) * | 2020-11-30 | 2021-04-06 | 沪东重机有限公司 | Large-scale marine diesel engine discharges aftertreatment system and simulation platform thereof |
| CN112610310B (en) * | 2020-11-30 | 2023-04-11 | 沪东重机有限公司 | Large-scale marine diesel engine discharges aftertreatment system and simulation platform thereof |
| CN115045739A (en) * | 2022-05-16 | 2022-09-13 | 潍柴动力股份有限公司 | Emission control method, control device and control system of marine diesel engine |
| CN115045739B (en) * | 2022-05-16 | 2024-02-20 | 潍柴动力股份有限公司 | Emission control method, emission control device and emission control system of marine diesel engine |
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