CN116357467A - Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder - Google Patents

Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder Download PDF

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Publication number
CN116357467A
CN116357467A CN202310425404.4A CN202310425404A CN116357467A CN 116357467 A CN116357467 A CN 116357467A CN 202310425404 A CN202310425404 A CN 202310425404A CN 116357467 A CN116357467 A CN 116357467A
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China
Prior art keywords
gas
valve
pipe
hydraulic oil
pressure
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CN202310425404.4A
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Chinese (zh)
Inventor
陈世林
魏守刚
王勇
陈怡然
史超
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CSSC MES Diesel Co Ltd
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CSSC MES Diesel Co Ltd
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Priority to CN202310425404.4A priority Critical patent/CN116357467A/en
Publication of CN116357467A publication Critical patent/CN116357467A/en
Pending legal-status Critical Current

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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
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • 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
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0623—Failure diagnosis or prevention; Safety measures; Testing
    • 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
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • 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
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0673—Valves; Pressure or flow regulators; Mixers
    • 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
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0686—Injectors
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

A multifunctional gas control device for a dual-fuel low-speed diesel engine cylinder comprises a distribution block, wherein a gas inlet valve, a gas return valve, a first multi-way valve, a second multi-way valve, a pressure sensor and a nitrogen control valve are arranged on the distribution block; the host control system is respectively connected with and controls the gas inlet valve, the gas return valve, the first multi-way valve, the second multi-way valve and the nitrogen gas control valve, the gas inlet valve is used for controlling gas inlet of the gas valve, the gas return valve is used for controlling gas return of the gas valve, the first multi-way valve is used for controlling hydraulic oil to enter the piston, gas in the gas valve is pressurized to injection pressure, the second multi-way valve is used for controlling the hydraulic oil to enter the thrust rod, the gas valve is opened to realize gas injection, the pressure sensor is used for monitoring the gas pressure and feeding back a signal to the host control system, and the nitrogen gas control valve is used for controlling nitrogen gas to enter the pipeline to realize purging and discharging of residual gas. The invention has the advantages of multifunction integration, safety, reliability, precise control, good universality, compact structure, convenient maintenance and the like.

Description

Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder
Technical Field
The invention relates to a marine low-speed diesel engine, in particular to a multifunctional gas control device for a dual-fuel low-speed diesel engine cylinder, and belongs to the technical field of diesel engines.
Background
With the popularization of dual-fuel diesel engines in the field of marine low-speed diesel engines, safe and stable entry of fuel gas into cylinders is important for normal operation of the diesel engines and ship safety. In the normal operation of the dual-fuel diesel engine, fuel gas is conveyed to the dual-fuel low-speed diesel engine through a gas supply pipeline, and a fuel gas control device of each cylinder continuously and stably conveys the fuel gas to a fuel gas valve of each cylinder and precisely controls the injection of the fuel gas according to a signal of a diesel engine control system. The higher risk factor of the gasification fuel such as LPG, methanol, etc. compared to the conventional diesel fuel, the higher probability of causing a cabin fire once a leak is generated, which will have extremely serious consequences for the ship as well as for the personal safety.
Therefore, by adopting a safe and reliable cylinder gas control device to control the opening and closing of the gas entering the cylinder, and realizing the purging and discharging of the residual gas in the host and the pipeline in the emergency is a vital safety guarantee for the safe operation of the dual-fuel diesel engine.
Disclosure of Invention
The invention aims to solve the problem of providing a multifunctional gas control device for a dual-fuel low-speed diesel engine cylinder, which realizes safe and reliable supply of gas, ensures stable gas injection of a gas valve, simultaneously cuts off the supply of gas in time under abnormal conditions, realizes purging and discharging of residual gas in a pipeline, and achieves the aim of ensuring safe and stable operation of a ship.
The invention solves the technical problems by the following technical proposal:
the multifunctional fuel gas control device for the cylinder of the dual-fuel low-speed diesel engine comprises a host control system, a fuel gas inlet pipe, a fuel gas return pipe, a high-pressure hydraulic oil pipe, a low-pressure hydraulic oil pipe, a hydraulic oil discharge pipe, a nitrogen gas pipe and a fuel gas valve, wherein the fuel gas valve comprises a piston, a thrust rod, a fuel gas valve inlet pipe and a fuel gas valve return pipe; the multifunctional gas control device is characterized by comprising a distribution block, wherein the distribution block is connected with a gas inlet valve, a gas return valve, a first multi-way valve, a second multi-way valve, a pressure sensor and a nitrogen control valve;
the gas inlet valve is respectively connected with the gas inlet pipe, the gas valve inlet pipe, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe, and is used for controlling gas inlet of the gas valve, the gas return valve is respectively connected with the gas return pipe, the gas valve return pipe, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe, and is used for controlling the high-pressure hydraulic oil to enter the piston, the gas in the gas valve is pressurized to the injection pressure, the second multi-way valve is respectively connected with the high-pressure hydraulic oil pipe, the hydraulic oil discharging pipe and the thrust rod, and is used for controlling the high-pressure hydraulic oil to enter the thrust rod, the gas valve is opened to realize gas injection, the pressure sensor is arranged on the gas valve inlet pipe at the outlet of the gas inlet valve, and is connected with the host control system, and is used for monitoring the gas supply pressure and feedback signals to the host control system, the nitrogen control valve is respectively connected with the gas pipe, the gas inlet pipe and the gas valve inlet pipe, and the residual control nitrogen inlet pipe are used for controlling the gas to enter the pipeline, and the control system is connected with the gas return valve, the first multi-way valve and the nitrogen inlet valve control system and the second multi-way valve.
Further, the multifunctional gas control device further comprises a first check valve and a second check valve, wherein an outlet of the nitrogen control valve is connected with the gas inlet pipe of the gas valve through the first check valve, and is connected with the gas return pipe of the gas valve through the second check valve.
Further, the multifunctional gas control device further comprises a gas accumulator and a hydraulic oil accumulator, wherein the gas accumulator is connected to a gas valve air inlet pipe at the outlet of the gas inlet valve and used for maintaining stable gas pressure, and the hydraulic oil accumulator is connected to a high-pressure hydraulic oil pipe at the inlet of the first multi-way valve and used for maintaining stable hydraulic oil pressure.
Further, the distribution block is internally provided with a through hole pipeline for connecting all the components.
Further, the multifunctional fuel gas control device realizes the fuel gas injection and residual fuel gas purging and discharging of the dual-fuel low-speed diesel engine cylinder through the following processes:
the method comprises the steps of normal operation and shutdown, wherein under the control of a host control system, a gas inlet valve and a gas return valve are opened, gas in a gas inlet pipe enters the gas valve through the gas inlet valve and a distribution block, a first multi-way valve controls high-pressure hydraulic oil to enter a piston to pressurize the gas in the gas valve to injection pressure, a second multi-way valve controls the high-pressure hydraulic oil to enter a thrust rod to open the gas valve, the gas is injected into a cylinder to realize combustion work, redundant gas returns to the gas return pipe through the gas return valve, a pressure sensor constantly monitors the gas supply pressure of the gas and feeds back to the host control system, and once the gas supply pressure of the gas deviates from a normal working range, the host control system sends out an instruction to close the gas inlet valve and the gas return valve to cut off gas supply;
when the engine is stopped normally, the host control system controls the gas inlet valve and the gas return valve to be closed, so that gas cannot enter the cylinder;
and (3) sweep residual gas, namely under the condition of cutting off the gas supply, the host control system controls the nitrogen control valve to be opened, high-pressure nitrogen enters the multifunctional gas control device, and sweep and discharge of residual gas in the device and the pipeline are realized.
Compared with the prior art, the invention has the following beneficial effects:
1) The multifunctional integration-the control of gas inlet and outlet cylinders, the monitoring of gas pressure and the gas purging function are integrated.
2) The safety is high, two-stage serial double-insurance control is adopted for the gas entering the cylinder, so that the operation safety is ensured, and meanwhile, the multifunctional gas control device is provided with pressure monitoring, so that the real-time monitoring and control on the operation of the gas and a host are realized.
3) The reliability is high-the control valve member adopts hydraulic power, the structure is simple, the reliability is high, no vulnerable parts are needed, the service life is long, and the service life is long.
4) The control is accurate, the control valve part acts according to the instruction of the host control system, the real-time performance is high, and the action control is accurate.
5) The universality is good, and the diesel engine can be widely applied to various types of dual-fuel low-speed diesel engines such as LPG, methanol, ammonia and the like only by properly adjusting the types of pressure sensors, check valves and the like.
6) Compact structure-high integration level, small volume, small installation space and convenient maintenance.
7) The power of the testing device is controlled by the hydraulic oil of the diesel engine, so that the energy consumption is low, and the testing device is safe and environment-friendly.
In a word, the invention has the advantages of multifunction integration, high safety, reliable performance, accurate control, good universality, compact structure, convenient maintenance, energy conservation, environmental protection and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic external view of the present invention.
In the figure, 1-a distribution block, 2-a gas inlet valve, 3-a gas return valve, 4-a first multi-way valve, 5-a second multi-way valve, 6-a pressure sensor, 7-a gas accumulator, 8-a hydraulic oil accumulator, 9-a nitrogen control valve, 10-a first check valve and 11-a second check valve.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These should be included in the scope of the present invention.
The invention is used for controlling the gas operation of the dual-fuel low-speed diesel engine cylinder, adopts two-stage series control for gas injection, monitors the pressure of gas supply of each cylinder, and realizes purging and discharging of residual gas in a pipeline so as to ensure the safe and stable operation of a ship.
The dual-fuel low-speed diesel engine comprises a host control system, a fuel gas inlet pipe, a fuel gas return pipe, a high-pressure hydraulic oil pipe, a low-pressure hydraulic oil pipe, a hydraulic oil discharge pipe, a nitrogen pipe and a fuel gas valve; the gas valve comprises a piston, a thrust rod, a gas valve air inlet pipe and a gas valve air return pipe.
As shown in fig. 1, the present embodiment provides a multifunctional gas control device for a dual-fuel low-speed diesel engine cylinder, which includes a distribution block 1, a gas inlet valve 2, a gas return valve 3, a first multi-way valve 4, a second multi-way valve 5, a pressure sensor 6, a gas accumulator 7, a hydraulic oil accumulator 8, a nitrogen control valve 9, a first check valve 10, and a second check valve 11.
As shown in fig. 2, the gas inlet valve 2, the gas return valve 3, the first multi-way valve 4, the second multi-way valve 5, the pressure sensor 6, the gas accumulator 7, the hydraulic accumulator 8, the nitrogen control valve 9, the first check valve 10 and the second check valve 11 are connected and mounted on the distribution block 1, and through hole pipelines for connecting all components are arranged inside the distribution block 1.
As shown in fig. 1, the gas inlet valve 2 is used for controlling the opening and cutting of the gas inlet of the gas valve, and is respectively connected with the gas inlet pipe, the gas valve inlet pipe, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe.
The gas return valve 3 is used for controlling the opening and the cutoff of the gas return of the gas valve and is respectively connected with the gas return pipe, the gas return pipe of the gas valve, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe.
The first multi-way valve 4 is used for controlling high-pressure hydraulic oil to enter the piston of the gas valve, pressurizing gas in the gas valve to injection pressure, and the first multi-way valve 4 is respectively connected with the high-pressure hydraulic oil pipe, the low-pressure hydraulic oil pipe, the hydraulic oil discharging pipe and the piston.
The second multi-way valve 5 is used for controlling high-pressure hydraulic oil to enter the thrust rod of the gas valve, the gas valve is opened to realize gas injection, and the second multi-way valve 5 is respectively connected with the high-pressure hydraulic oil pipe, the hydraulic oil discharging pipe and the thrust rod.
The pressure sensor 6 is arranged on a gas valve inlet pipe at the outlet of the gas inlet valve 2, is connected with the host control system, and is used for monitoring gas supply pressure and feeding back signals to the host control system.
The gas accumulator 7 is connected to a gas valve inlet pipe at the outlet of the gas inlet valve 2 and is used for absorbing pulse pressure fluctuation generated by gas, maintaining stable gas pressure and reducing impact of the pressure fluctuation on equipment and instruments.
The hydraulic oil accumulator 8 is connected to the high-pressure hydraulic oil pipe at the inlet of the first multi-way valve 4, and is used for absorbing pulse pressure fluctuation generated by hydraulic oil, maintaining the pressure stability of the hydraulic oil and reducing the impact of the pressure fluctuation on equipment and instruments.
The nitrogen control valve 9 is connected with the nitrogen pipe and is used for controlling nitrogen to enter the pipeline to realize purging and discharging of residual fuel gas, an outlet of the nitrogen control valve 9 is connected with the fuel gas valve air inlet pipe through the first check valve 10, and is connected with the fuel gas valve air return pipe through the second check valve 11.
The host control system is respectively connected with and controls the gas inlet valve 2, the gas return valve 3, the first multi-way valve 4, the second multi-way valve 5 and the nitrogen control valve 9.
The working principle of the multifunctional gas control device for the dual-fuel low-speed diesel engine cylinder is as follows:
normal operation-under the control of the host control system, the gas inlet valve 2 and the gas return valve 3 are opened, and the gas in the gas inlet pipe enters the gas valve through the gas inlet valve 2 and the distribution block 1; after receiving an opening instruction of the host control system, the first multi-way valve 4 controls high-pressure hydraulic oil to enter the piston so as to pressurize fuel gas in the fuel gas valve to injection pressure; after receiving an opening instruction of the host control system, the second multi-way valve 5 controls high-pressure hydraulic oil to enter the thrust rod, opens a needle valve in the gas valve, and injects gas into a cylinder to realize combustion work; the redundant fuel gas returns to the fuel gas return pipe through the fuel gas return valve 3 and returns to the gas supply system;
in the running process, the pressure sensor 6 continuously monitors the gas supply pressure of the gas all the time and feeds back the gas supply pressure to the host control system, and once the gas supply pressure of the gas deviates from the normal working range, the host control system sends out a command to close the gas inlet valve 2 and the gas return valve 3 and cut off the gas supply.
And normally stopping the engine, wherein the host control system controls the gas inlet valve 2 and the gas return valve 3 to be closed, so that gas cannot enter the cylinder, and the host normally stops running.
Sweep gas-under the condition of cutting off the gas supply, the host control system sends out an instruction to control the nitrogen control valve 9 to be opened, high-pressure nitrogen enters the multifunctional gas control device, and sweep and discharge of the residual gas in the device and the pipeline are realized.

Claims (5)

1. The multifunctional fuel gas control device for the cylinder of the dual-fuel low-speed diesel engine comprises a host control system, a fuel gas inlet pipe, a fuel gas return pipe, a high-pressure hydraulic oil pipe, a low-pressure hydraulic oil pipe, a hydraulic oil discharge pipe, a nitrogen gas pipe and a fuel gas valve, wherein the fuel gas valve comprises a piston, a thrust rod, a fuel gas valve inlet pipe and a fuel gas valve return pipe; the multifunctional gas control device is characterized by comprising a distribution block, wherein the distribution block is connected with a gas inlet valve, a gas return valve, a first multi-way valve, a second multi-way valve, a pressure sensor and a nitrogen control valve;
the gas inlet valve is respectively connected with the gas inlet pipe, the gas valve inlet pipe, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe, and is used for controlling gas inlet of the gas valve, the gas return valve is respectively connected with the gas return pipe, the gas valve return pipe, the high-pressure hydraulic oil pipe and the hydraulic oil discharging pipe, and is used for controlling the high-pressure hydraulic oil to enter the piston, the gas in the gas valve is pressurized to the injection pressure, the second multi-way valve is respectively connected with the high-pressure hydraulic oil pipe, the hydraulic oil discharging pipe and the thrust rod, and is used for controlling the high-pressure hydraulic oil to enter the thrust rod, the gas valve is opened to realize gas injection, the pressure sensor is arranged on the gas valve inlet pipe at the outlet of the gas inlet valve, and is connected with the host control system, and is used for monitoring the gas supply pressure and feedback signals to the host control system, the nitrogen control valve is respectively connected with the gas pipe, the gas inlet pipe and the gas valve inlet pipe, and the residual control nitrogen inlet pipe are used for controlling the gas to enter the pipeline, and the control system is connected with the gas return valve, the first multi-way valve and the nitrogen inlet valve control system and the second multi-way valve.
2. The multifunctional gas control device for the dual-fuel low-speed diesel engine cylinder according to claim 1, wherein the multifunctional gas control device further comprises a first check valve and a second check valve, wherein an outlet of the nitrogen control valve is connected with the gas valve inlet pipe through the first check valve, and is connected with the gas valve return pipe through the second check valve.
3. The multifunctional gas control device for the dual-fuel low-speed diesel engine cylinder according to claim 1, further comprising a gas accumulator and a hydraulic oil accumulator, wherein the gas accumulator is connected to a gas valve inlet pipe at an outlet of the gas inlet valve for maintaining stable gas pressure, and the hydraulic oil accumulator is connected to a high-pressure hydraulic oil pipe at an inlet of the first multi-way valve for maintaining stable hydraulic oil pressure.
4. The multifunctional gas control device for the dual-fuel low-speed diesel engine cylinder according to claim 1, further characterized in that the distribution block is internally provided with a through hole pipeline connecting each component.
5. The multifunctional gas control device for a dual-fuel low-speed diesel engine cylinder according to claim 1, wherein the multifunctional gas control device realizes gas injection and purging and bleeding of residual gas for the dual-fuel low-speed diesel engine cylinder by:
the method comprises the steps of normal operation and shutdown, wherein under the control of a host control system, a gas inlet valve and a gas return valve are opened, gas in a gas inlet pipe enters the gas valve through the gas inlet valve and a distribution block, a first multi-way valve controls high-pressure hydraulic oil to enter a piston to pressurize the gas in the gas valve to injection pressure, a second multi-way valve controls the high-pressure hydraulic oil to enter a thrust rod to open the gas valve, the gas is injected into a cylinder to realize combustion work, redundant gas returns to the gas return pipe through the gas return valve, a pressure sensor constantly monitors the gas supply pressure of the gas and feeds back to the host control system, and once the gas supply pressure of the gas deviates from a normal working range, the host control system sends out an instruction to close the gas inlet valve and the gas return valve to cut off gas supply;
when the engine is stopped normally, the host control system controls the gas inlet valve and the gas return valve to be closed, so that gas cannot enter the cylinder;
and (3) sweep residual gas, namely under the condition of cutting off the gas supply, the host control system controls the nitrogen control valve to be opened, high-pressure nitrogen enters the multifunctional gas control device, and sweep and discharge of residual gas in the device and the pipeline are realized.
CN202310425404.4A 2023-04-20 2023-04-20 Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder Pending CN116357467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310425404.4A CN116357467A (en) 2023-04-20 2023-04-20 Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310425404.4A CN116357467A (en) 2023-04-20 2023-04-20 Multifunctional gas control device for dual-fuel low-speed diesel engine cylinder

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Publication Number Publication Date
CN116357467A true CN116357467A (en) 2023-06-30

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