CN109281787A - Large two-stroke compression ignition internal combustion engine with dual fuel system - Google Patents
Large two-stroke compression ignition internal combustion engine with dual fuel system Download PDFInfo
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- CN109281787A CN109281787A CN201811009563.1A CN201811009563A CN109281787A CN 109281787 A CN109281787 A CN 109281787A CN 201811009563 A CN201811009563 A CN 201811009563A CN 109281787 A CN109281787 A CN 109281787A
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- fuel
- engine
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- pump
- injection system
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- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/02—Pumps peculiar thereto
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
-
- 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
- F02D19/0684—High pressure fuel injection systems; Details on pumps, rails or the arrangement of valves in the fuel supply and return systems
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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
- F02D19/08—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 simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
-
- 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
- Y02T70/00—Maritime or waterways transport
- Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
- Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Ocean & Marine Engineering (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of cross-head type large-sized two-stroke turbocharging compression ignition multi-cylinder internal combustion engines (9).Engine (9) includes the supply of the first fuel and spraying system (52), for first kind fuel to be transported to the cylinder (1) of engine, and including the fluid clutch (43) and/or booster for pressurizeing to first kind fuel；The supply of second fuel and spraying system (53), for Second Type fuel to be transported to the cylinder of engine, and including the fluid clutch and/or booster (39) for pressurizeing to Second Type fuel；And hydraulic pump sees off (22), including multiple Mechanical Driven hydraulic pumps (24,25), which is driven by the power output from engine.The engine is configured to selectively use the first fuel or the second fuel handling.Hydraulic pump see off (22) be configured to: supply hydraulic power to the supply of the first fuel and spraying system (52) when engine is using the first fuel handling, and hydraulic pump see off (22) be configured to supply hydraulic power to the supply of the second fuel and spraying system (53) when engine is using the second fuel handling.
Description
Technical field
This disclosure relates to a kind of large-sized two-stroke compression-ignition, internal combustion engine with bifuel system.
Background technique
Large-sized two-stroke list stream turbocharging compression ignition crosshead internal combustion engine is typically used as the propulsion of large ship
Prime mover of system or power plant.Absolute volume, weight and power output keeps them entirely different with conventional internal combustion engines,
And large-sized two-stroke turbocharging compression-ignition, internal combustion engine is classified as one kind for its own.
Large-sized two-stroke compression-ignition, internal combustion engine usually utilizes liquid fuel such as fuel oil or heavy fuel oil
Operation.However, having caused the growing interest in terms of environment towards using substituted type fuel, such as natural gas, oil gas, first
The development such as alcohol, ethyl alcohol, coal slurry, petroleum coke.Gas usually stores in liquid form, but sprays in gaseous form.
These substituted type fuel have the characteristic that processing is difficult or impossible to for traditional fuel pump.Some fuel such as coal
Slurry has abrasion, and some fuel such as gasoline or ethyl alcohol lubricating quality are very poor, and other fuel such as liquefied gas-low temperature
The extremely low temperature of fuel requirement.
In most applications, engine calls are able to use the conventional fuel of such as marine diesel oil or heavy fuel oil, with
And it uses the substitution of such as liquefied gas or ethyl alcohol and is more prone to the fuel operating of environmental protection.
Therefore, for each used fuel type, dedicated fuel supply and spraying system are required.It is this right
The demand of two independent fuel supplies and spraying system significantly increases the initial cost for building engine, and increases hair
The complexity and maintenance cost of motivation.
Therefore, it is necessary to one kind can use two distinct types of fuel, and can overcome or at least reduce other
Cost and increased complexity engine.
Summary of the invention
The purpose of the present invention is to provide a kind of engines overcome or at least reduce the above problem.
Foregoing end other objects are realized by the feature of independent claims.From dependent claims, specification and attached
In figure, further way of realization is obvious.
According in a first aspect, providing a kind of cross-head type large-sized two-stroke turbocharging compression ignition multi cylinder internal combustion hair
Motivation, the engine include:
The supply of first fuel and spraying system, are used to for first kind fuel being transported to the cylinder of engine, this first
Fuel supply and spraying system include the fluid clutch and/or booster (pressure for pressurizeing to first kind fuel
Booster),
The supply of second fuel and spraying system, are used to for Second Type fuel being transported to the cylinder of engine, this second
Fuel supply and spraying system include the fluid clutch and/or booster for pressurizeing to Second Type fuel, and
Hydraulic pump sees off comprising multiple Mechanical Driven hydraulic pumps, the Mechanical Driven hydraulic pump is by dynamic from engine
Power output driving,
Engine is configured to selectively using the first fuel or the second fuel handling, and
Hydraulic pump, which sees off, to be configured to: when engine uses the first fuel handling to the supply of the first fuel and spraying system
Hydraulic power is supplied, and the hydraulic pump sees off and is configured to supply when engine is using the second fuel handling to the second fuel
Hydraulic power is supplied with spraying system.
By providing the single hydraulic pump of power can be neatly provided to any one in two fuel feed systems
It sees off, dedicated bunkie station can be provided to avoid for each fuel feed system, to reduce cost and complexity.
According to the embodiments possible of first aspect, engine includes hydraulic-driven exhaust valve actuation system, is being started
It is all operated when machine is operated using first kind fuel and when engine is operated using Second Type fuel, hydraulic pump, which sees off, is matched
It is set to when engine is operated using first kind fuel and is caused when engine is operated using Second Type fuel to exhaust valve
Dynamic system supplies hydraulic power.
According to the embodiments possible of first aspect, the selection group of multiple Mechanical Driven hydraulic pumps is exclusively used in causing to exhaust valve
Dynamic system and the supply of the first fuel and spraying system provide hydraulic power, and wherein when engine utilizes Second Type fuel
When operation, the non-dedicated pump of one or more of multiple Mechanical Driven hydraulic pumps selectively supplies to the second fuel and sprays system
System provides hydraulic power.
The first electronic control valve selectivity according to the embodiments possible of first aspect, on the outlet side of non-dedicated pump
Ground may be connected to first pipe or second pipe, and the first electronic control valve is connected to the supply of the first fuel and injection by first pipe
System is simultaneously connected to valve actuation system, and the first electronic control valve is connected to the supply of the second fuel and spraying system by second pipe.
According to the embodiments possible of first aspect, the first hydraulic P1 needed for the supply of the first fuel and spraying system is at least
Lower than the second hydraulic P2 needed for the supply of the second fuel and spraying system under certain operating conditions of engine, and wherein the
One pipeline supplies the first fuel and spraying system sees off with hydraulic pump and connect, and wherein second pipe supplies the second fuel
It sees off and connect with hydraulic pump with spraying system, first pipe preferably also supplies exhaust valve actuation system.
According to the embodiments possible of first aspect, hydraulic booster is arranged in second pipe for will be by hydraulic pumping
The first pressure P1 conveyed that stands increases to second pressure P2, and hydraulic booster is preferably driven by hydraulic motor or electric power motor
It is dynamic.
According to the embodiments possible of first aspect, hydraulic pressure relief valve gear is arranged in first pipe for will be by hydraulic
The second pressure P2 of bunkie station conveying is reduced to first pressure P1.
According to the embodiments possible of first aspect, the selection group of multiple Mechanical Driven hydraulic pumps is exclusively used in causing to exhaust valve
Dynamic system, the supply of the first fuel and spraying system provide hydraulic power, and wherein when engine is grasped using Second Type fuel
When making, one or more variable displacement dedicated pumps of multiple Mechanical Driven hydraulic pumps are provided to the supply of the second fuel and spraying system
Hydraulic power.
According to the embodiments possible of first aspect, one or more Mechanical Driven hydraulic pumps are variable displacement hydraulic pumps.
According to the embodiments possible of first aspect, engine includes electronic control unit, is configured to control first
The operation that fuel supply and spraying system, the supply of the second fuel and spraying system, exhaust valve actuation system and hydraulic pump see off, should
Electronic control unit is configured to:
The supply of the first fuel and spraying system is set to drop (ramp down) obliquely downward,
The supply of the second fuel and spraying system is set to ramp up (ramp up),
With receive will operation from first kind Fuel switching to when the instruction of Second Type fuel, will be by hydraulic pumping
The a part for the hydraulic power supplied of standing is transferred to the supply of the second fuel and spraying system from the supply of the first fuel and spraying system.
According to the embodiments possible of first aspect, electronic control unit is configured to that the first fuel is made to supply and spray system
System ramps up, and drops the supply of the second fuel and spraying system obliquely downward, and will operate from Second Type Fuel switching receiving
To first kind fuel instruction when will be supplied and sprayed from the second fuel by see off a part of hydraulic power of supply of hydraulic pump
The system of penetrating is transferred to the supply of the first fuel and spraying system.
According to the embodiments possible of first aspect, the hydraulic power supplied to the supply of the second fuel and spraying system is also supplied
To the hydraulic rotating motor of driving compressor, the Second Type fuel of the compressor compresses gaseous form.
According to the embodiments possible of first aspect, the supply of the second fuel and spraying system include hydraulic-driven high-pressure pump,
The high-pressure pump includes two or more pump units, and each pump unit includes that the pump being slidably disposed in single pump cylinder is lived
The hydraulic-driven drive piston filled in and be slidably disposed in single drive cylinder, wherein drive piston is connected to pump piston use
In driving pump piston.
According to the embodiments possible of first aspect, engine includes at least one main control valve, is connected to hydraulic pump
It sees off and is used to control the flow of the hydraulic fluid of the drive cylinder to and from one or more pump units, high pressure with fuel tank
Hydraulic fluid source is preferably the source with variable and controllable pressure level.
According to the embodiments possible of first aspect, engine includes that the heat for the outlet for being connected to hydraulic-driven high-pressure pump is handed over
Parallel operation or evaporator.
According to second aspect, providing a kind of includes according to the assembly of two engines of above embodiment, engine
Share single hydraulic-driven high-pressure pump and heat exchanger or evaporator.
According to the embodiments possible of second aspect, the hydraulic pump of each engine sees off non-dedicated including at least one
Pump, the entrance for the non-dedicated pump that wherein hydraulic pump of one in engine sees off are provided with selector valve, are used for selectively
Connect the fuel tank and mistake of entrance relevant to the fuel tank of another engine and filtration system or connection and correlation engine
The relevant entrance of filter system.
According to the embodiments possible of second aspect, assembly is configured to control selections valve, related to non-dedicated pump
Another engine be connected to the second fuel supply the entrance for being provided with the non-dedicated pump of selector valve is connected with when spraying system
To the fuel tank and filtration system of another engine.
According to the embodiments possible of second aspect, the hydraulic pump of two engines sees off respectively variable including at least one
Discharge capacity dedicated pump, the entrance of at least one variable displacement dedicated pump are connected in assembly one fuel in two engines
Case and filtration system.
From the embodiments described below, these and other aspects of the invention be will be apparent.
Detailed description of the invention
In the part in detailed below of the disclosure, with reference to the accompanying drawings shown in exemplary embodiment this hair is explained in greater detail
It is bright, in which:
Fig. 1 is the vertical view front view of large-sized two-stroke diesel engine accoding to exemplary embodiment,
Fig. 2 is the engine of Fig. 1 and two fuel supplies and spraying system, its exhaust valve actuation system and its hydraulic pump
The schematic diagram to see off,
Fig. 3 is the more detailed schematic diagram of two fuel supplies and spraying system and exhaust valve actuation system,
Fig. 4 to Fig. 7 be Fig. 1 engine and two fuel supply and spraying system, its exhaust valve actuation system and its
The schematic diagram for the other embodiments that hydraulic pump sees off,
Fig. 8 to Figure 10 is two engines of Fig. 1 and its four fuel supply and spraying system, its exhaust valve actuation system
The schematic diagram of another embodiment of the assembly to see off with its hydraulic pump,
Figure 11 is shown in the engine according to any one embodiment from first kind Fuel switching to Second Type fuel
Operation during fuel supply flow amount curve graph, and
Figure 12 is to show each fuel during Figure 11 is slave first kind Fuel switching to the operation of Second Type fuel
The curve graph that the hydraulic power of supply and spraying system consumes.
Specific embodiment
In the following detailed description, it is used to have the large-sized two-stroke of crosshead low the description of reference example embodiment
The fuel feed system of fast turbocharging compression-ignition, internal combustion engine 9.Fig. 1 shows big with deflecting roller 7 and crosshead
Type low speed turbocharging two-stroke diesel engine 9.In this exemplary embodiment, there are six single-row cylinder arrangements for engine tool.Greatly
Type low speed turbocharging two-stroke diesel engine usually has the single-row cylinder arrangement between four to 14, by internal combustion engine rack 6
The cylinder frame of carrying carries.Engine 9 can be used for example as sustainer in ship or as operating in power station
The stationary engine of generator.Total output of engine for example can be in the range of 1000kW to 110000kW.
In this exemplary embodiment, engine 9 is two-stroke single flow pattern compression ignition engine, is had in cylinder bush
Scavenging port at the lower area of set 1 and the central discharge air valve 4 at the top of cylinder liner 1.Scavenging is from 2 quilt of scavenging receiving unit
It is transmitted to the scavenging port of each cylinder 1.Piston in cylinder liner 1 compresses scavenging, is sprayed by the fuel valve in cylinder head all
Such as the high pressure fuel of gaseous fuel or liquid fuel, then occurs to burn and generate exhaust.
When exhaust valve 4 is opened, exhaust flows through exhaust pipe associated with associated cylinder and enters exhaust receiving unit 3, and
The turbine of turbocharger 5 is gone to, exhaust flows out into atmosphere from turbine by exhaust pipe.The whirlpool of turbocharger 5
Wheel drive supplies the compressor of fresh air via air inlet.Pressurization scavenging is transported to by compressor leads to scavenging receiving unit 2
Scavenging pipeline.Scavenging in scavenging pipeline passes through the intercooler for cooling down scavenging.
Fig. 2 is engine 9 and its fuel injection system 52,53, and exhaust valve actuation system 54 and its hydraulic pump see off 22
Schematic diagram.The operation of these systems of the control of electronic control unit 50.Although being shown as individual unit, electronic control unit 50
It can have distributed nature.Engine 9 and its system are mountable on such as ship of LNG cargo ship or bulk bin ship.
Engine 9 be provided with for first kind fuel marine diesel oil or heavy fuel oil etc. the first fuel supply and
Spraying system 52.
Engine 9 is additionally provided with for Second Type fuel such as liquefied petroleum gas (LPG), liquefied natural gas (LNG), liquid
Change the supply of the second fuel and the spraying system 53 of ethane gas (LEG) etc..These liquefied gas are evaporated before ejecting and with gas
State form is ejected into engine.The other examples that can be used for the fuel type of the second fuel system are such as ethyl alcohol or methanol
Low-flash fuel.
Engine 9 is provided with hydraulic-driven and electronically controlled exhaust valve actuation system 54.
Hydraulic pump sees off 22 to each consumption portion of hydraulic power supply hydraulic power, including to the supply of the first fuel and sprays
It penetrates system 52, the supply of the second fuel and spraying system 53 and exhaust valve actuation system 54 provides hydraulic power.Hydraulic pump sees off 22
It is provided with multiple Mechanical Driven hydraulic pumps 24,25.These hydraulic pumps 24,25 are driven by the power output from engine, such as
It is driven by hydraulic pump 24,25 to be connected to chain drive or the gear drive of engine crankshaft.
Hydraulic pump see off 22 also set up there are two hydraulic starting pump 26, they are driven by Electric Drive motor.These are hydraulic
Starting pump 26 is for providing hydraulic power and pressure for the startup stage of engine.These starting pumps 26 and other it is driven by electricity pump
(not shown) can also be used for providing other hydraulic power when engine is run.Start pump electric power can by with engine phase
Associated generating set is provided by other suitable electric power sources such as alternating current or battery.
Engine 9 is provided with lubricating oil system and low-pressure hydraulic system.In embodiment, low-pressure hydraulic system used
The lubricating oil of filter is as hydraulic fluid.
Low-lift pump 29 pressurizes to low-pressure hydraulic system.Hydraulic pump sees off 22 via including the pipeline of filter 28 from low pressure liquid
Pressure system provides hydraulic fluid.
Engine 9 is configured to operate using first kind fuel or Second Type fuel.When engine 9 utilizes the second class
When type fuel operates, it can be used very small amount of first kind fuel as pilot fuel (Fire lighter fluids).However, it is this very
A small amount of pilot fuel is not disposed in the supply of the first fuel and spraying system 52, but is mentioned by dedicated light fluid transportation system
For the dedicated light fluid transportation system is preferably integrated with the supply of the second fuel and spraying system 53.
Figure 11 is second for showing the fuel consumption of the first kind fuel indicated by uninterrupted line and being indicated by intermittent line
The fuel consumption of fuel and the curve graph of time.Therefore, curve show from use first kind fuel handling to making
With the transformation of Second Type fuel handling.When curve graph starts, engine 9 is operated using first kind fuel.At t1, electricity
Sub-control unit 50 receives the instruction by operation from the first kind change of fuel for Second Type fuel, or at t1, electronics
It is Second Type fuel that control unit 50, which determines to operate from the first kind change of fuel,.Therefore, at t2, control unit 50 makes
The amount of the first kind fuel of conveying drops obliquely downward, and ramps up the amount of the Second Type fuel of conveying, until the first kind
The amount of fuel is zero and the amount of Second Type fuel is in desired level.
Meanwhile electronic control unit 50 starts to control hydraulic pump at t1 and sees off 22, to reduce to the supply of the first fuel and
The hydraulic power amount that spraying system 52 supplies, and increase the hydraulic power supplied to the supply of the second fuel and spraying system 53
Amount.At t2, hydraulic power, which is distributed, to be consolidated.
As shown in Figure 2 schematically, engine 9 is provided with the exhaust valve actuation system 54 of hydraulic-driven, the exhaust valve
Actuating system 54 is all grasped when engine is operated using first kind fuel and when engine is operated using Second Type fuel
Make.Hydraulic pump, which sees off, 22 to be configured to when engine 9 is operated using first kind fuel and in engine 9 using Second Type
Hydraulic power all is supplied to exhaust valve actuation system 54 when fuel operates.The exhaust valve actuation system 54 of hydraulic-driven is by electronics control
Unit 50 processed controls.
In the embodiment of fig. 2, hydraulic pump see off 22 include three Mechanical Driven hydraulic pumps 24,25.Pump is started by coming from
The power output of machine 9 drives.In this embodiment, Mechanical Driven hydraulic pump 24,25 be controlled by electronic control unit 50 can
Variable-displacement pump, i.e. discharge capacity are controlled by electronic control unit 50.Selected group of multiple Mechanical Driven hydraulic pumps 24 is (in illustrated embodiment
In, selected group includes two Mechanical Driven hydraulic pumps 24) it is exclusively used in exhaust valve actuation system 54, the supply of the first fuel and injection
System 52 provides hydraulic power.When engine utilizes Second Type fuel handling, one in multiple Mechanical Driven hydraulic pumps
Or it is multiple it is non-dedicated pump 25 (in the shown embodiment, show one it is non-dedicated pump 25) selectively to the second fuel supply and
Spraying system 53 provides hydraulic power.
First electronic control valve 27 of 25 outlet sides of non-dedicated pump is selectively connectable to first pipe 32 or the second pipe
Road 33.First electronic control valve 27 is connected to the supply of the first fuel and spraying system 52, valve actuation system 54 by first pipe 32,
First electronic control valve 27 is connected to the supply of the second fuel and spraying system 53 by second pipe 33.Electronic control unit 50 is ordered
First electronic control valve 27.Therefore, non-dedicated pump 25 is connected to 50 property of can choose of electronic control unit pipeline 32 or pipe
Road 33, so that the hydraulic power from non-dedicated pump 25 is selectively supplied to the supply of the first fuel and spraying system 52, liquid
Pressure exhaust valve actuating system 54, or it is supplied to the supply of the second fuel and spraying system 53.
The supply of second fuel and spraying system 53 include heat exchanger or the steaming for the outlet for being connected to hydraulic-driven high-pressure pump
Device is sent out, one reinstates the expression of appended drawing reference 71.
Using hydraulic fluid is from the supply of the first fuel and spraying system and the second fuel supplies and spraying system, hydraulic exhaust
Valve actuation system returns to fuel tank 61.Low-lift pump 29 via include filter 28 pipeline to include hydraulic pump see off 22 hair
Each consumption portion of motivation 9 supplies hydraulic fluid.
Fig. 3 shows the supply of the first fuel and spraying system 52, the supply of the second fuel and injection schematically in more detail
System 53 and hydraulic exhaust valve actuation system 54.
Second fuel feed system 53 includes the fuel storage tank 8 of storage Second Type fuel.If fuel is liquefied gas
Body, then it is stored under cryogenic in fuel storage tank 8.Feed pipe connects the outlet of fuel or lubricating oil storage bin 8
It is connected to the entrance of high-pressure pump 40.Feed pump 10 helps the entrance that fuel or lubricating oil are transported to pump 40 from storage bin 8.
Liquid fuel is pumped into engine from service 18 by high-pressure pump 40.High-pressure pump 40 is provided with two or more pumps
Unit 41,42,43 (in the present embodiment, shows 3 pump units).Each pump unit 41,42,43 includes being mounted slidably
In the pump piston 62 pumped in cylinder 61 and the hydraulic-driven drive piston 46 being slidably disposed in drive cylinder 45, wherein passing
Piston 46 is connected to pump piston 62 to drive pump piston 62.
Pump piston 62 and pump cylinder 61 form positive-displacement pump.In embodiment, pump piston 62 and pump cylinder 61 form low temperature
The so-called cold end of pump unit, the cryopump unit have the pump chamber 63 for pumping liquefied gas.
Pump cylinder 61 is connected to the drive piston of relevant pump unit 41,42,43 via piston rod 49.Drive piston 46 will
The inside of drive cylinder 45 is divided into Transmission Room 48 and returns to room 47.
Drive cylinder 45 is connected to hydraulic pump and sees off 22.Main control valve 19 controls high pressure hydraulic fluid and flows to drive cylinder
45.Main control valve 19 is configured to that each Transmission Room 48 is selectively connected to pipeline 33 or fuel tank.
Each pump unit 41,42,43 includes the pump of the linear positive-displacement pump form formed by pump cylinder 61, pumps 61 He of cylinder
The pump piston 62 being contained in pump cylinder 61 forms pump chamber 63.Pump chamber 63 is connected to delivery pipe via the first check valve (not shown)
Road 9, first check valve only allow fluid to flow to pressure chamber 63.Pump chamber 63 is connected to supply via second one-way valve (not shown)
Pipeline 18, the second one-way valve only allow outgoing fluid pressure room 63.
If Second Type fuel is the low temp fuel of such as LNG or LPG, high-pressure pump 40 is cryogenic pump.If second
Fuel is the non-cryogenic fuel of such as ethyl alcohol, then high-pressure pump 40 is for pumping the positive discharge capacity of the conventional linear of non-cryogenic fluid
Pump.
The supply of second fuel and spraying system 53 include the liquefied gas storage for storing such as natural gas under cryogenic
Case 8 (if non-cryogenic fuel is used as Second Type fuel, uses conventional storage bin 8).Pressure phase in LNG storage bin 8
It is kept constant to lower, and by allowing boil-off gas to escape from storage bin, such as the auxiliary of boiler or such as ship
The low-pressure gas jet engine of engine.Evaporation process also makes the liquefied gas in storage bin keep low temperature.In storage bin 8
Liquefied gas can be another seed type in addition to natural gas, such as ethane or methane.
The outlet of LNG storage bin 8 is connected to the entrance of high-pressure pump 40 by feed pipe 9.Low pressure feed pump 10 is helped liquid
Change the entrance that gas is transported to high-pressure pump 40 from LNG storage bin 8.It is alternatively possible to pressurize to LNG storage bin 8, allow to province
Go low pressure supply pump 10.The entrance that the outlet of high-pressure pump 40 is connected to high pressure evaporator 14 is used for high pressure liquid by transmission pipeline 13
Change gas and is transported to high pressure evaporator 14 from high-pressure pump 40.If Second Type fuel is not liquefied gas, high pressure evaporator
It is replaced by heat exchanger 14.Liquefied gas is pumped into high pressure evaporator 14 via transmission pipeline 13 by high-pressure pump 40.High-pressure evaporation
Device 14 receives high pressure liquefied gas, and makes the gas evaporation using the heat exchanger in high pressure evaporator 14.Pressure evaporator 14
Heat is exchanged between heat exchange medium such as ethylene glycol and liquefied gas, heat exchange medium recycles in circulation loop 15.It follows
Loop back path 15 includes circulating pump 16 and heater 17.High-pressure evaporation gas is via the high-pressure evaporation for being connected to fuel feeding duct 18
Leave high pressure evaporator 14 in the outlet of device 14.High-pressure pump 40 is designated as pump evaporator unit (PVU) simultaneously with evaporator 14 together
It is designated as appended drawing reference 71.
Service 18 sprays the fuel that the outlet of high pressure evaporator 14 is connected to the supply of the second fuel and spraying system 53
Penetrate the entrance of system.Pipeline is branched off into each injector 64 from service 18, and injector 64 is configured to fire Second Type
Material is ejected into cylinder 1.
Cylinder 1 is provided with fuel valve 64 for spraying Second Type fuel and for spraying first kind fuel
Fuel injection valve 23.
First fuel injection feed system 52 is supplied to hydraulic power via first pipe 32.Accumulator or discharge chambe 67 are true
The each consumption portion for protecting hydraulic power can get stable pressure, and distribution duct 69 is via each control valve 11,44,55 to each
Consumption portion supply pressure.
First kind fuel is provided from storage bin 12 (service tank), and by being driven by electricity supply pump 16 via feed pipe 73
It is transported to booster 39.Being driven by electricity supply pump 16 ensures that about 4 bars of pressure can be kept in the low-pressure section of fuel system.
The fuel injection of first kind fuel is executed by electronic control booster 39,1 one boosters of each cylinder.Pressurization
Device 39 makes the pressure from low-pressure side (place for applying hydraulic fluid) to high-pressure side (fuel-side) multiplied by fixed ratio.
Booster 39 provides power by the hydraulic fluid to pressurize.Hydraulic pump see off 22 conveyings be usually several hectobars high pressure liquid
Press fluid.Returning fluid is transported to fuel tank 61 from cylinder via pipeline 65.
Discharge chambe 67 is set (in the case where engine has odd number cylinder, wherein in cylinder for every a pair of of cylinder 1
One can be provided by single discharge chambe).Discharge chambe 67 is connected to proportional control valve 44, on/off valve 55 and ratio by pipeline 69
Example control valve 11.
Each cylinder 1 of engine 9 is associated with electronic control unit 50, which receives general synchronization
With control signal, and electronic control signal is transferred to by proportional control valve 44 by signal line or conducting wire 59.Each cylinder 1 can
It can be associated with identical electronic control unit 50 with a management control unit 50 or several cylinders 1.
Electronic control unit 50 calculates timing, speed adjust and the amount of fuel injection according to the operating condition of engine 9.Extremely
This, electronic control unit 50 receives the rotation speed about the rotation position of crankshaft, crankshaft, and (it can be by control unit 50 from rotation
Exported in position signal), environment temperature, load, various engine fluids temperature information.Electronic control unit 50 is also adjusted
The timing of fuel injection is used for reversing engine.The movement of spool is controlled by control unit 50 in proportional control valve 44.
In the resting position of proportional control valve, the pressure chamber of the low-pressure side of booster 39 is connected to combustion by proportional control valve 44
Hopper.When electronic control unit 50 sends signal to start fuel injection to given cylinder, one in proportional control valve 44
It opens to a certain extent, and 39 low-pressure side of booster is thus connected to discharge chambe 67 via pipeline 69, thus by hydraulic high-pressure
It sees off 22 low-pressure sides for being applied to booster 39 from hydraulic pump.
The pressure multiplier of the low-pressure side of booster 39 generally reaches the injection pressure between about 400 bars to 1500 bars.Charging
High pressure fuel is transported to fuel injector 23 from booster 39 by pipeline 51, and the fuel injector 23 is via its nozzle by the first kind
Type fuel injection makes first kind fuel atomization into combustion chamber.
Electronic control unit 50 also controls the actuating of exhaust valve 4.Exhaust valve overcomes air by hydraulic valve actuator 21
The power of spring and be turned on and off.Proportional control valve 11 is selective by hydraulic valve actuator 21 via pipeline 77 and discharge chambe 67
Ground and ratio are controllably connected to first pipe 35, or are connected to fuel tank 61 via pipeline 78 and 65.Electronic control is single
Member 50 controls proportional control valve 11 via signal line or conducting wire 59.Electronic control unit 50 is according to crank position and engine
The timing of operating condition control exhaust valve 4 lifted.In its resting position, proportional control valve 11 is by hydraulic exhaust valve actuators 21
It is connected to fuel tank 61.
Electronic control unit 50 also controls on/off valve 55, controls to cylinder lubricator 57 and supplies pressurized cylinder profit
Lubricating oil.Position based on operating condition and crankshaft, control unit 50 determine when for cylinder lubricating oil to be pumped into and pump to cylinder 1
Enter the cylinder lubricating oil how much measured.In its resting position, valve 55 is turned on/off by cylinder lubricator 57 and is connected to fuel tank 61.
When given on/off valve 55 is received from control unit 50, and lubricating oil is pumped into the signal of specific cylinder, on/off
Valve 55 is opened, and cylinder lubricator 57 is therefore connected to discharge chambe 67 via pipeline 69, and cylinder lubricator will start by
Lubricating oil is pumped into cylinder.Control unit 50 determines the lubricating oil for being pumped into cylinder via the duration of activation on/off valve 55
Amount.
Therefore, in embodiment, in addition first pipe 32 provides hydraulic power to engine cylinder lubrication system.Although note
It anticipates and arrives, compared with the amount for the hydraulic power that exhaust valve actuation system and fuel injection system use, engine cylinder lubrication system
Usually using the hydraulic power of relatively small amount.
In addition to second pipe 33 is provided with for increasing the hydraulic liter supplied to the supply of the second fuel and spraying system 53
Other than press pump 34, Fig. 4 shows embodiment substantially identical with the embodiment of Fig. 2.In embodiment, it is supplied with the second fuel
It is compared with hydraulic pressure supply pressure P2 needed for spraying system 53, the supply of the first fuel and spraying system 52 may need lower liquid
Press supply pressure P1.In embodiment, the supply of the first fuel and supply pressure needed for spraying system 52, exhaust valve actuation system 54
Power P1 can follow engine loading, and the pressure P2 being substantially equal under maximum engine load.Booster 34 will be non-dedicated
The output pressure of pump 25 increases to pressure P2 from pressure P1.In this embodiment, booster 34 is driven by hydraulic motor 36.It is hydraulic
Motor 36 provides power by the hydraulic power from second pipe 33.
Other than booster 34 is driven by electric power motor 38, Fig. 5 shows substantially identical as the embodiment of Fig. 4
Embodiment.
Other than following situations, Fig. 6 shows embodiment substantially identical with the embodiment of Fig. 4: all mechanical drives
Hydrodynamic press pump 24,25, which supplies high pressure P2 and low pressure P1, to be realized by arranging relief valve unit 31 in first pipe 32,
So that the supply of the first fuel and spraying system 52, hydraulic exhaust valve actuation system 52 receive low pressure P1.
In addition at least one Mechanical Driven variable delivery pump 20 be exclusively used in via second pipe 32 to the second fuel supply and
Other than spraying system 53 supplies, Fig. 7 shows embodiment substantially identical with the embodiment of Fig. 2.Therefore, by electronics control
Dedicated variable displacement pump 20 is adjusted under the control of unit 50 processed, can be independently adjusted and is supplied to the supply of the second fuel and injection system
The pressure P2 of system 53.
Fig. 8 shows tool there are two hydraulic power unit 22 and the assembly of two engines 9, which uses shared PVU
71.Hydraulic pump sees off 22 both to the single shared offer of PVU 71 hydraulic power.In order to avoid the hydraulic pressure system of an engine
System is sent to one from the single hydraulic return fluid for sharing PVU 71 and is started by the hydraulic system pollution of another engine
The fuel tank 61 of machine, and start for see off 22 dedicated variable displacement hydraulic pump 20 of the hydraulic pump of two engines from one
The fuel tank 61 of machine receives hydraulic fluid.
Other than hydraulic pump sees off and is provided with non-dedicated Mechanical Driven hydraulic pump 25, Fig. 9 is shown substantially with Fig. 8's
The assembly of identical two engines 9 of assembly.In order to avoid the hydraulic oil from an engine is by the liquid of another engine
Pressure oil pollution, the hydraulic pump of an engine non-dedicated fluid clutch 25 in 22 that sees off are provided with electronics control in its inlet
Selector valve 30 processed so that 50 property of can choose of electronic control unit provide to come to relevant non-dedicated Mechanical Driven hydraulic pump 25
The hydraulic fluid of the engine belonging to the non-dedicated Mechanical Driven hydraulic pump 25 is provided from the hydraulic of another engine
Fluid.Therefore, when non-dedicated Mechanical Driven hydraulic pump 25 changes into supply the from the supply of the first fuel of supply and spraying system 52
Two fuel supply and when spraying system 53, electronic control unit 50 by order two hydraulic pumps see off 22 the first electronic control valve
27 and a hydraulic pump see off 22 electronic control selector valve 30 change position, vice versa.
In addition to embodiment also comprise driving compressor 72 hydraulic rotating motor 70 other than, Figure 10 show substantially with
The identical embodiment of the embodiment of Fig. 7.The Second Type fuel of 72 compressed gaseous of compressor, to supply and spray for the second fuel
Penetrate system 53.The hydraulic power for being supplied to the supply of the second fuel and spraying system 53 is also the hydraulic rotating horse for driving compressor 72
Power is provided up to 70.
Figure 11 is shown according to any one of embodiment, within the engine, is using first kind fuel from 100%
Operation (being shown by uninterrupted line) is switched to 100% and is supplied using the fuel during Second Type fuel handling (being shown by intermittent line)
To the relationship of flow F (l/s) and time t (s).At t1, it is in using the operation of first kind fuel and is dropped obliquely downward, utilized simultaneously
The operation of Second Type fuel is in and ramps up.Make to drop obliquely downward using the operation of first kind fuel and makes to fire using Second Type
The process that the operation of material ramps up continues at t2 that engine 100% is at T2 with Second Type operating fuel.Therefore, in t2
Place, switching are completed.
Figure 12 shows each fuel during the operation of Figure 11 is from first kind Fuel switching to Second Type fuel
The hydraulic power of supply and spraying system consumes H (kW).First fuel system and the consumption of the hydraulic power of exhaust valve actuation system
It is shown by uninterrupted line, the hydraulic power consumption of the second fuel system is shown by intermittent line.At t1, the first fuel system and row
The power consumption of air valve actuating system is begun to decline, and until it reaches maintenance level at t2, i.e., is reached when Fuel switching is completed
To maintenance level.Because the first fuel system will not be used any hydraulic power, residual fuel consumption indicates exhaust valve
The fuel consumption of actuating system.At t1, the power consumption of the second fuel system starts to increase, and reaches stable water at t2
It is flat, i.e., reach maintenance level when switching and completing.
Each embodiment is had been combined herein describes the present invention.However, by attached drawing, open and appended claims
Research, those skilled in the art are understood that and realize to the disclosed embodiments when practicing invention claimed
Other modifications.In the claims, vocabulary " comprising " is not excluded for other element or steps, and indefinite article "one" or
" one " is not excluded for multiple.Electronic control unit can be combined to be formed by individual electronic control unit.Mutually different
Dependent claims in quote from certain measures this simple facts and be not offered as the combinations of these measures and cannot advantageously be made
With.Appended drawing reference used in claim is not necessarily to be construed as limiting the range.
Claims (17)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201770660A DK179683B1 (en) | 2017-09-04 | 2017-09-04 | A large two-stroke compression-ignited internal combustion engine with dual fuel systems |
| DKPA201770660 | 2017-09-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281787A true CN109281787A (en) | 2019-01-29 |
| CN109281787B CN109281787B (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811009563.1A Active CN109281787B (en) | 2017-09-04 | 2018-08-31 | Large two-stroke compression ignition internal combustion engine with dual fuel system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6650003B2 (en) |
| KR (1) | KR102058380B1 (en) |
| CN (1) | CN109281787B (en) |
| DK (1) | DK179683B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692029A (en) * | 2019-03-13 | 2020-09-22 | 罗伯特·博世有限公司 | High-pressure pump for dual-fuel injection system, dual-fuel injection system |
| CN112112729A (en) * | 2020-08-28 | 2020-12-22 | 江苏大学 | Variable air inlet tumble flow device of direct injection engine in dual-fuel cylinder |
| CN112392785A (en) * | 2020-11-12 | 2021-02-23 | 天津大学 | Servo driving system for fuel booster pump and exhaust valve of low-speed diesel engine |
| CN117988974A (en) * | 2022-11-04 | 2024-05-07 | 曼能解决方案（曼能解决方案德国股份公司）分公司 | Large turbocharged two-stroke uniflow crosshead internal combustion engine and method for operating the same |
| US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102382406B1 (en) * | 2021-01-06 | 2022-04-11 | 최재웅 | Fuel gas supply system of liquefied gas |
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| CN102840072A (en) * | 2011-06-24 | 2012-12-26 | 卡特彼勒公司 | Dual fuel injector for common rail system |
| CN103987945A (en) * | 2011-12-16 | 2014-08-13 | 罗伯特·博世有限公司 | Fuel system |
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| CN111692029A (en) * | 2019-03-13 | 2020-09-22 | 罗伯特·博世有限公司 | High-pressure pump for dual-fuel injection system, dual-fuel injection system |
| CN112112729A (en) * | 2020-08-28 | 2020-12-22 | 江苏大学 | Variable air inlet tumble flow device of direct injection engine in dual-fuel cylinder |
| CN112392785A (en) * | 2020-11-12 | 2021-02-23 | 天津大学 | Servo driving system for fuel booster pump and exhaust valve of low-speed diesel engine |
| US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
| CN117988974A (en) * | 2022-11-04 | 2024-05-07 | 曼能解决方案（曼能解决方案德国股份公司）分公司 | Large turbocharged two-stroke uniflow crosshead internal combustion engine and method for operating the same |
| CN117988974B (en) * | 2022-11-04 | 2024-09-24 | 曼能解决方案（曼能解决方案德国股份公司）分公司 | Large turbocharged two-stroke uniflow crosshead internal combustion engine and method for operating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DK201770660A1 (en) | 2019-03-20 |
| JP2019044774A (en) | 2019-03-22 |
| JP6650003B2 (en) | 2020-02-19 |
| KR102058380B1 (en) | 2019-12-23 |
| KR20190026620A (en) | 2019-03-13 |
| DK179683B1 (en) | 2019-03-20 |
| CN109281787B (en) | 2020-03-06 |
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