CN101070788A - Common rail fuel injection system with fuel circulation for a large two-stroke diesel engine - Google Patents
Common rail fuel injection system with fuel circulation for a large two-stroke diesel engine Download PDFInfo
- Publication number
- CN101070788A CN101070788A CNA2006100833754A CN200610083375A CN101070788A CN 101070788 A CN101070788 A CN 101070788A CN A2006100833754 A CNA2006100833754 A CN A2006100833754A CN 200610083375 A CN200610083375 A CN 200610083375A CN 101070788 A CN101070788 A CN 101070788A
- Authority
- CN
- China
- Prior art keywords
- control valve
- fuel
- pressure
- valve
- injection pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 114
- 239000007924 injection Substances 0.000 title claims abstract description 114
- 239000000446 fuel Substances 0.000 title claims abstract description 110
- 239000010763 heavy fuel oil Substances 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002000 scavenging effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- 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
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a large two-stroke diesel engine with a common fuel injection system. A fuel injection of a large two-stroke diesel engine includes a low pressure conduit, an intermediate pressure conduit, a high pressure common fuel rail. The control valves control the flow from the common fuel rail to the fuel injection valve. The fuel valve comprises a entry connected with control valve through injection conduit, and a exit connected with the low pressure conduit. The control valve connects the injection conduit with common rail when the fuel injection starts, and connects the injection conduit with low pressure conduit or intermediate pressure conduit when the fuel injection ends. The invention furthermore comprises valve gear for connecting the intermediate pressure conduit with injection conduit directly or by control valve, and for fuel cycle during outofoperation of engine.
Description
Technical field
The present invention relates to a kind of common rail fuel injection system that is used for the carrying fuel circulation means of large two-stroke diesel engine, more specifically, the present invention relates to a kind of with heavy fuel oil work, therefore and when motor does not turn round, also need to be incubated the common rail fuel injection system that solidifies with the fuel that prevents in the fuel injection system parts.
Background technique
Prime mover that the large two-stroke diesel engine of crosshead for example is used for advancing large-scale marine vessel or is used as the power station.Not only be because the factor of size completely, the structure of these two stroke diesel engines and any other structure of internal-combustion engine are all inequality.The use of two stroke principle and heavy fuel oil---its viscosity in the time of 50 ℃ is lower than 700cst (described oil does not at room temperature flow)---makes them belong to distinctive classification in engine art.
Because heavy fuel oil does not at room temperature flow, the high viscosity of heavy fuel oil make in the operation process of motor and in the stopped process temperature of all parts in the fuel injection system all must keep higher.Must prevent that the fuel in the fuel system under any circumstance from condensing.The common rail fuel injection system that becomes known in the large two-stroke diesel engine comprises a storage tank that is heated and a preheater that is arranged in the motor supply line.During engine running, lasting the flowing of fuel makes the parts in the fuel injection system be incubated, need not external heat.Keep the Another reason of the temperature of the parts in the fuel injection system to be at the motor stopping period: the high precision part that for example is arranged in fuel valve is very sensitive to the rapid change of temperature.Therefore, can make with minimized gap at the fuel injection component of motor stopping period insulation, thereby can move more accurately.
At the motor stopping period, the major part that heavy fuel oil cycles through fuel injection system is incubated with the different parts of giving fuel injection system, and makes it keep the degassing (deaerated).Yet, all provide a circulating path normally very difficult and complicated to all parts of fuel injection system, the fuel injection system of common-rail type is especially true.Therefore, some parts of fuel injection system---injection valve of for example known common rail fuel injection system that is used for large two-stroke diesel engine (EP 995 903)---are incubated by fuel oil heat-preserving equipment, steam insulation equipment or electrical heating elements.Yet steam insulation equipment or electrical heating elements have increased the complexity of device, and have increased the complexity of tune-up, and reason is because of needing to remove steam insulation equipment or electrical heating elements and ressemble after maintenance before checking.And, stop and using external heat when keeping the temperature of fuel valve at motor, do not have the degasifying effect that brings by fuel cycle.Prove that also it is difficult that so a kind of fuel injection system is provided: it can keep the high pressure in the fuel common rail when motor stops, thereby motor is remained on stand-by state (large two-stroke diesel engine can keep stand-by state at least, and several hrs is necessary), and, can also make fuel pass through injection valve simultaneously circularly.
Summary of the invention
On this basis, an object of the present invention is to provide a kind of large-scale, with the two stroke diesel engine of heavy oil work, it overcomes or has reduced above-mentioned problem at least.By claim 1, provide a kind of large-scale, two-stroke, many cylinders, the diesel engine of crosshead and realized this purpose, described diesel engine has one can be with the fuel injection system of heavy fuel oil work, described fuel injection system comprises a low pressure pipeline that is connected to a low pressure source, a middle pressure pipe road that is connected to potential source in, a fuel under high pressure that is connected to a high-pressure fuel source is total to rail, at least one Fuelinjection nozzle of each cylinder, a plurality of to the mobile control valve of controlling from common rail to Fuelinjection nozzle, control valve is connected to the injection pipe of Fuelinjection nozzle inlet, described control valve is connected to common rail with described injection pipe, thereby when the fuel injection beginning, described injection pipe is pressurizeed, and be connected to described low pressure pipeline or middle pressure pipe road, thereby when fuel sprays end, described injection pipe is carried out step-down, described fuel valve is provided with the outlet that links to each other with described low pressure pipeline, and the control valve unit that is used for described pressure pipe road is connected to described injection pipe, be used for the heavy fuel oil circulation when motor does not turn round.
When not turning round injection pipe is connected to the control valve unit in middle pressure pipe road, the circulation fuel oil can be provided to injection valve, keep being total to the high pressure in the rail simultaneously by being arranged on motor.Thereby motor can remain on stand-by state, and injection valve can be incubated and need not to be incubated or Electric heating appliance simultaneously.Thereby motor can be constructed and keep in repair (need not remove thermal insulation apparatus for maintenance) simply, and can be more suitable for remaining under the stand-by state.
Preferably, control valve is pressed branching of pipes during injection pipe is connected to, be used for when fuel sprays end the injection pipe step-down, simultaneously, the control valve unit that is used for described pressure pipe road is connected to described injection pipe comprises that two are provided with safety check on the contrary, and described two safety check are arranged in the branch of leading to control valve in pressure pipe road in each.
The branch of leading to control valve in pressure pipe road can comprise a forked part with two parallelpipeds in described, in any that is arranged in this two parallelpiped in described two opposite safety check that are provided with.In any case all need a safety check, to guarantee a back-pressure, if this back-pressure prevents that control valve and injection valve are owing to abrupt pressure reduction is subjected to too high impact---do not have pressure controlled valve, then this abrupt pressure reduction can take place.Another safety check is used for preventing that high pressure fuel from flowing to the pressure pipe road at fuel between injection period.Thereby, between middle pressure pipe road and injection pipe, formed one simple and be connected reliably, the heavy fuel oil that is used for the motor stopping period circulates.
Preferably, control valve is connected to low pressure pipeline with injection pipe, be used for when fuel sprays end the injection pipe step-down, and preferably, when motor did not turn round, described injection pipe was connected to described middle pressure pipe road by a safety check, makes heavy fuel oil to circulate, described safety check allows fuel therefrom to flow to injection pipe in the pressure pipe road, but does not allow fuel pressure pipe road from injection pipe flows to.Of the present invention this becomes example also provides a simple and reliable connection at the motor stopping period between middle pressure pipe road and injection pipe.
Control valve can be connected to low pressure pipeline with injection pipe, with when fuel spray to finish to the injection pipe step-down, described injection pipe can by an electrical control valve be connected to described in the pressure pipe road, its between middle pressure pipe road and injection pipe ready-made one make and can connect by circuit at motor stopping period heavy fuel oil.Of the present invention this becomes example also provides a simple and reliable connection at the motor stopping period between middle pressure pipe road and injection pipe.
Preferably, control valve is connected to low pressure pipeline with injection pipe, be used for when fuel sprays end the injection pipe step-down, and preferably, the branch of leading to control valve of described low pressure pipeline includes a spring-loaded safety check or other pressure controlled valve, it makes the pressure in the component that leads to control valve of low pressure pipeline keep greater than the pressure in the low pressure pipeline, and one of them electrical control valve is connected to the branch of leading to control valve of described low pressure pipeline with pressure pipe road in described, makes and can circulate at motor stopping period heavy fuel oil.Of the present invention this becomes example also provides one effectively to connect between middle pressure pipe road and injection pipe.
Fuel valve can comprise a jet blower and be used for high-pressure liquid from the inlet Guide spray mouth of injection valve and with the control valve unit of hydraulic fluid from the outlet of the inlet Guide spray valve of injection valve.Thereby high pressure fuel is guided between injection period to nozzle at fuel, and simultaneously, in the cyclic process of heavy fuel oil, middle compression ignite oil is guided to low pressure pipeline.
Control valve can be such type: it is controlled by solenoid valve.
Other purpose, feature, advantage and performance according to large two-stroke diesel engine of the present invention will become clear by detailed description.
Description of drawings
In the detailed description of the present invention part, the present invention is described in detail hereinafter by example embodiment shown in the drawings, wherein:
Fig. 1 is the sectional view according to motor of the present invention;
Fig. 2 is the longitudinal sectional view that is shown in a cylinder of the motor among Fig. 1;
Fig. 3 is the symbolistic expression according to first mode of execution of motor of the present invention;
Fig. 4 is the symbolistic expression according to second mode of execution of motor of the present invention;
Fig. 5 is the symbolistic expression according to the 3rd mode of execution of motor of the present invention;
Fig. 6 is the symbolistic expression according to the 4th mode of execution of motor of the present invention;
Fig. 7 is the symbolistic expression according to the 5th mode of execution of motor of the present invention.
Embodiment
Fig. 1 and 2 show respectively one according to the sectional view of the motor 1 of the present invention's one preferred implementation and longitudinal sectional view (for single cylinder).Motor 1 is a crosshead diesel engine a kind of one-way flow, low speed, two stroke, the cross hair style, and it can be used as the propulsion system of steamer or the motive force in the power station.These motors have the cylinder that 3 to 14 series connection are provided with usually.Motor 1 forms by a base plate 2 that has the main bearing of bent axle 3.
Bent axle 3 is half composite types.Half composite type is made by forging the iron and steel crank of making or casting, and described crank is connected with main journal by shrink-fit.
Connecting rod 8 is connected to cross head bearing 22 with bent axle 3.Cross head bearing 22 is directed between the vertical guide plate 23.
The A shape frame-box 4 of a Welding Design is installed on the base plate 2.Frame-box 4 is Welding Design.Exhaust side in frame-box 4 is provided with the safety valve that is used for each cylinder, and is provided with the big hinged door that is used for each cylinder in the camshaft side of frame-box 4.Crosshead guide plate 23 is integrated in the frame-box 4.
A cylinder seat 5 is installed in the top of frame-box 4.Stay-bolt 29 links together base plate 2, frame-box 4 and cylinder seat 5 and described structure is kept together.Stay-bolt 29 is tightened by hydraulic jack.
That cylinder seat 5 is cast as at last is one or more, have an integrated camshaft frame 25, and perhaps it is designed to be welding.One according to this mode of execution becomes routine (not shown), electrically controls the actuating of outlet valve, and do not have camshaft 28 or camshaft frame 25, but have the hydraulic system of an electrical control.
Piston 13 comprises piston head and piston skirt.Piston head is by heat-resisting steel manufacturing, and has four circular grooves, all is coated with hard chromium on the upper surface of described circular groove and lower surface.
Piston rod 14 is connected to crosshead 22 by four screws.Piston rod 14 has two coaxial holes (difference is seen in the drawings), and described hole combines with oil cooling service pipe and formed the entrance and exit of the cold oil of piston 13.
Cylinder belongs to the type of one-way flow and has the scavenging port 7 that is arranged in gas tank, and it is by sweeping air-capacitor device 9 (Fig. 1) supply with the scavenging by turbosupercharger 10 (Fig. 1) supercharging.
Motor is equipped with one or more turbosupercharger 10, is arranged on the motor tail end for 4-9 the described turbosupercharger 10 of cylinder engine, is arranged on the exhaust side of motor for the described turbosupercharger 10 of motor of 10 or more a plurality of cylinders.
The air inlet of turbosupercharger 10 directly comes from engine compartment, passes through the baffler (not shown) of turbosupercharger.From turbosupercharger 10, gas directs into the scavenging port 7 of cylinder sleeve 6 by an outlet pipe (not shown), air-cooler (not shown) and scavenge air receiver 9.
Motor is provided with the scavenge blower (not shown) of electric driving.The suction side of blower is connected to the gas-swept space behind the air-cooler.Dispose the safety check (not shown) between air-cooler and scavenge air receiver, when the auxiliary blower supply gas, described safety check automatically cuts out.Auxiliary blower plays help to the turbocharger compressor under low load or the medium load.
Fig. 3 shows first mode of execution according to fuel injection system of the present invention.Fig. 3 only shows two cylinders of motor, makes accompanying drawing simple, so that be explained and illustrated.Yet, should be appreciated that motor 1 can comprise the cylinder more than two.Fuel injection system comprises a heavy fuel oil storage tank 27, and heavy fuel oil at high temperature is stored in wherein.Heavy fuel oil under low pressure (preferably 2 to 10 crust between) be sucked into a low pressure pipeline 32 (in order to back up, always being equipped with at least two supply pumps, but for simplicity, only shown in the drawings) by a low pressure feed pump 30.Low pressure pipeline 32 comprises the branch 33 that outlet a plurality of and fuel valve 50 links to each other.Low pressure feed pump 30 replenishes the corresponding fuel of fuel respective numbers that is consumed with motor 1.
High pressure fuel pump 40 under high pressure is that fuel common rail 42 is supplied with heavy fuel oil.Pressure in the fuel common rail may fluctuate, but preferably, the pressure in the fuel common rail 42 remains on 600 and clings between 1200 crust.Service 44 is branched to each cylinder from fuel common rail 42.Control valve 46 is connected to injection pipe 48 with each service 44.Each injection pipe 48 is connected to the inlet (alternatively, can only be provided with or more than two the fuel valve 50 that is associated with each cylinder) of two fuel valves 50 that are associated with each cylinder.
Control valve 46 (it can be a Proportional valve) is electric control, and receives control signal by line 56 from unshowned electric control unit.Control valve 46 has a first portion---it is connected to injection pipe 48 with service 44---and a second portion---its by the branch 39 in middle pressure pipe road 38 injection pipe 48 is connected in pressure pipe road 38.When needs began to relevant cylinder injection fuel, control unit command control valve 46 was taked primary importance, and when the fuel that needs finish associated cylinder sprayed, control unit command control valve 46 was taked the second place.Control unit is from a tachometer (not shown) received signal, the zero hour and the finish time of spraying with the fuel of judging each cylinder.
A spring-loaded safety check 58 guarantees that the pressure release of injection pipe 48 when fuel sprays end can be very not unexpected, thereby makes fuel valve 50 and control valve 46 can not damage because of too high impact force.Typically, spring-loaded safety check 58 remains on back-pressure about about 100 crust.Except spring-loaded safety check, can also adopt the pressure controlled valve (not shown).
The branch 39 in middle pressure pipe road 38 is fork-shapeds, thereby it includes two parallel pipe sections 61 and 62.Above-mentioned safety check 58 is arranged in the pipe section 61, and allow from control valve 46 to the flowing of pressure pipe road 38, and another safety check 59 is arranged in the pipe section 62, and allows pressure pipe road 38 therefrom towards the flowing of control valve 46, and is used for the heavy fuel oil circulation when motor stops.
When motor stopped, rail 42 can keep pressurization when the needs engine standby altogether.If do not need engine standby, then altogether rail 42 can the step-down by the release pipeline 67 under reduction valve 66 controls, and described reduction valve 66 can open or close the connection that forms between rail 42 and the low pressure pipeline 32 altogether under the instruction of control unit.When motor stopped, the pressure during recycle pump 36 keeps in the pressure pipe road made it than high about 4 crust of the pressure in the low pressure pipeline 32 that is kept by supply pump 30.In this case, control valve 46 remains on the second place, and middle pressure pipe road 38 is connected to injection pipe 48.
In a preferred embodiment, the circulation loop that is formed by middle pressure pipe road 38 and low pressure pipeline 32 is provided with steam insulation heating plant and adiabatic apparatus.
Pressure difference during a side/backpressure valve 69 maintains between pressure pipe road 38 and the low pressure pipeline 32.
Fig. 4 shows according to second mode of execution of the present invention (for practical purpose, only show a cylinder, yet, be to be understood that, this mode of execution can be used in the motor that comprises two or more cylinders), wherein control valve 46 is by a solenoid valve 70 controls, and described control valve 46 is instructed by an order line 56 by control unit.The position of control valve 46 is determined by hydro cylinder 72.First pressure chamber 75 that has less effective piston area in cylinder 72 connects by a piston and piston rod and control valve 46 is pressed to the second place, and in this second place, injection pipe 48 is connected to the branch 44 of common rail 42.Second pressure chamber 77 that has big effective piston area in cylinder 72 is pressed to a primary importance with control valve 46, in this primary importance, and the branch 39 in pressure pipe road 38 during injection pipe 48 is connected to.The branch 44 of rail directly is connected to first pressure chamber 75 altogether, and is connected to second pressure chamber 77 by a limiting device 79.Branch 44 is connected to low pressure pipeline 32 by limiting device 79, another limiting device 82 and solenoid valve 70.Only when solenoid valve 70 was shown in an open position, the connection between branch 44 and the low pressure pipeline 32 just can be opened.When solenoid valve 70 was opened according to the instruction of control unit, heavy fuel oil began from branch 44 by two limiting devices 79 and 82 and flow to low pressure pipeline 32 by solenoid valve 70.Limiting device 79 mobile of flowing through formed a pressure drop, and it causes pressure in the pressure chamber 77 to be lower than pressure in the pressure chamber 75 significantly.Thereby cylinder 72 is forced into control valve 46 in the primary importance, and wherein branch 44 is connected to injection pipe 48 and the injection of beginning fuel.When in case solenoid valve 70 cuts out according to the instruction of control unit, pressure drop in limiting device 79 both sides is eliminated, and the big piston area of pressure chamber 77 causes cylinder 72 that control valve 46 is depressed into the second place, thereby injection pipe 48 is connected to the branch 39 in middle pressure pipe road 38.
When motor stopped, control valve 46 also was positioned on the second place, and the heavy fuel oil of depressing in being in can flow to the inlet of fuel valve 50 by safety check 59, by control valve 46 and injection pipe 48.This fuel valve 50 is left in the outlet of the fuel valve of heavy fuel oil by being connected to low pressure pipeline 32 branches 33.
Fig. 5 shows according to the 3rd mode of execution of the present invention (for practical purpose, only show a cylinder, yet, should be appreciated that this mode of execution can be used in the motor that comprises two or more cylinders), and itself and mode of execution shown in Figure 3 are similar.Yet when control valve 46 was on its second place, injection pipe 48 was connected to the branch 33 of low pressure pipeline 32.For fear of pressurization fuel valve 50 and control valve 46 are caused damage, in this mode of execution, spring-loaded safety check 58 is arranged in the branch 33 of low pressure pipeline 32.Between control valve 46 and safety check 58, the branch 39 in middle pressure pipe road 38 is connected to the branch 33 of low pressure pipeline.The circulation valve 81 of an electrical control (a single circulation valve can be used for all cylinders) is arranged in the branch 39.When motor did not turn round, circulation valve 81 and when engine running, was moved to its closed position in the control of the instruction that comes from control unit under the control of the instruction that comes from control unit and move to its open position.
When circulation valve 81 is shown in an open position, the ballast fuel oil that is arranged in pipeline 39 can flow into the inlet of Fuelinjection nozzle 50 by control valve 46 and injection pipe 48, and leave this Fuelinjection nozzle by the outlet of Fuelinjection nozzle, arrive at the branch 33 of low pressure pipeline 32.
Fig. 6 shows according to the 4th mode of execution of the present invention (for practical purpose, only show a cylinder, yet, should be appreciated that this mode of execution can be used in the motor that comprises two or more cylinders), and itself and mode of execution shown in Figure 3 are similar.Yet the branch 39 in middle pressure pipe road 38 is not forked, and only includes spring-loaded safety check 58.As an alternative, pressure pipe road 38 during injection pipe 48 branches to by a pipeline 41 is without control valve 46.Safety check 59 is arranged in the pipeline 41, pressure pipe road 38 in getting back to avoid high pressure fuel return pipe road 41.On the other hand, when motor stopped, middle ballast fuel oil therefrom pressure pipe road 38 flow to the inlet of injection pipe 48 and fuel valve 50 through piping 41 and safety check 58.Fuel valve 50 is left in fuel valve 50 outlets of the branch 33 of heavy fuel oil by being connected to low pressure pipeline 32.
Fig. 7 shows according to the 5th mode of execution of the present invention (for practical purpose, only show a cylinder, yet, should be appreciated that this mode of execution can be used in the motor that comprises two or more cylinders), and itself and mode of execution shown in Figure 3 are similar.Yet control valve 46 is connected to injection pipe 48, is connected to pipeline 33 ' on its second place, is provided with a spring-loaded safety check 58 in this pipeline 33 '.Pipeline 33 ' by safety check 59 and bifurcated to middle pressure pipe road 38.In the power operation process, when control valve 46 was positioned at the second place, the pressure in the injection pipe 48 controllably discharged with spring-loaded safety check 58 by pipeline 33 '.When motor 1 does not turn round, in the ballast fuel oil therefrom flow to the branch 33 of low pressure pipeline 32 via the outlet of inlet, fuel valve 50 and the fuel valve of safety check 59, branch 33 ', control valve 46, injection pipe 48, fuel valve in pressure pipe road 38, make heavy fuel oil can cycle through injection valve 50.
Term in the claim " comprises " member of not getting rid of other.The term " one " or " one " that are used for claim do not get rid of a plurality of situations.
The label that is used for claim is not used in scope of the present invention is limited.
Though for illustrative purposes and invention has been described, should be appreciated that these details only are for purpose of description, and those skilled in the art can change therein and can not depart from category of the present invention.
Claims (8)
1. the diesel engine of many cylinders of two-stroke crosshead of one kind large-scale, described diesel engine has one can be with the fuel injection system of heavy fuel oil work, and described fuel injection system comprises:
A low pressure pipeline that is connected to a low pressure source,
A middle pressure pipe road that is connected to potential source in,
A fuel under high pressure that is connected to a high-pressure fuel source is total to rail,
At least one Fuelinjection nozzle of each cylinder,
It is a plurality of to the mobile control valve of controlling from described common rail to described Fuelinjection nozzle,
Described control valve is connected to the injection pipe of described Fuelinjection nozzle upper inlet,
Described control valve is connected to described rail altogether with described injection pipe, thereby when the fuel injection beginning described injection pipe is pressurizeed, and is connected to described low pressure pipeline or middle pressure pipe road, thereby when fuel sprays end described injection pipe is carried out step-down,
Described fuel valve is provided with the outlet that links to each other with described low pressure pipeline and pressure pipe road in described is connected to the control valve unit of described injection pipe, is used for the heavy fuel oil circulation when motor does not turn round.
2. motor as claimed in claim 1, wherein said control valve is pressed branching of pipes during injection pipe is connected to, be used for when fuel spray to finish the injection pipe step-down, and two safety check of setting on the contrary in each described branch of the guiding control valve in pressure pipe road in wherein being used for the control valve unit that described pressure pipe road is connected to described injection pipe is included in.
3. motor as claimed in claim 2, the branch of leading to control valve in pressure pipe road includes a fork portion with two parallelpipeds in wherein said, in any that is arranged in these two parallelpipeds in described two opposite safety check that are provided with.
4. motor as claimed in claim 1, wherein said control valve is connected to low pressure pipeline with injection pipe, be used for when fuel sprays end the injection pipe step-down, and wherein, described injection pipe is connected to described middle pressure pipe road by a safety check, be used for the heavy fuel oil circulation when motor does not turn round, described safety check allows pressure pipe road therefrom to the flowing of injection pipe, but do not allow from injection pipe to the flowing of pressure pipe road.
5. motor as claimed in claim 1, wherein said control valve is connected to low pressure pipeline with described injection pipe, be used for when fuel sprays end described injection pipe step-down, and wherein said injection pipe by an electrical control valve be connected to described in the pressure pipe road, described electrical control valve is set up a heavy fuel oil circuit connection when being used for motor and not working between pressure pipe road and the injection pipe in described.
6. motor as claimed in claim 5, wherein said control valve is connected to low pressure pipeline with injection pipe, be used for when fuel sprays end the injection pipe step-down, and the branch of leading to control valve of wherein said low pressure pipeline comprises a spring-loaded safety check or other pressure controlled valve, described safety check or other pressure controlled valve keep greater than the pressure in the described low pressure pipeline pressure in the component that leads to control valve of described low pressure pipeline, and one of them electrical control valve is connected to the branch of leading to control valve of described low pressure pipeline with pressure pipe road in described, the heavy fuel oil circulation when being used for motor and not working.
7. motor as claimed in claim 1, wherein said fuel valve can comprise a jet blower and control valve unit, and described control valve unit is used for high-pressure liquid from lead described jet blower and being used for the outlet of hydraulic fluid from the inlet Guide spray valve of injection valve of the inlet of injection valve.
8. motor as claimed in claim 1, wherein said control valve is controlled by solenoid valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006133586 | 2006-05-12 | ||
| JP2006133586A JP4121531B2 (en) | 2006-05-12 | 2006-05-12 | Fuel circulation common rail fuel injection system for large two-cycle diesel engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101070788A true CN101070788A (en) | 2007-11-14 |
| CN100578000C CN100578000C (en) | 2010-01-06 |
Family
ID=38602873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610083375A Expired - Fee Related CN100578000C (en) | 2006-05-12 | 2006-06-06 | Common rail fuel injection system with fuel circulation device for a large two-stroke diesel engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4121531B2 (en) |
| KR (1) | KR100749277B1 (en) |
| CN (1) | CN100578000C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251047B (en) * | 2007-02-22 | 2012-10-10 | 曼柴油机和涡轮公司,德国曼柴油机和涡轮欧洲股份公司的联营公司 | Large two-stroke dual-fuel diesel engine |
| CN103384761A (en) * | 2011-01-26 | 2013-11-06 | 卡特彼勒公司 | Dual fuel injector for a common rail system |
| CN105473843A (en) * | 2013-08-20 | 2016-04-06 | 瓦锡兰芬兰有限公司 | Fuel injection circuit and method for operating a multi-fuel piston engine |
| CN105518284A (en) * | 2013-08-20 | 2016-04-20 | 瓦锡兰芬兰有限公司 | Fuel injection system and method for operating a multi-fuel piston engine |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101253118B1 (en) * | 2008-07-14 | 2013-04-10 | 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 | Cam driven exhaust valve actuation system for large two stroke diesel engine |
| JP4657386B2 (en) | 2008-11-11 | 2011-03-23 | エムエーエヌ・ディーゼル・アンド・ターボ・フィリアル・アフ・エムエーエヌ・ディーゼル・アンド・ターボ・エスイー・ティスクランド | Large two-cycle diesel engine with electronically controlled exhaust valve actuation system |
| AT509405A1 (en) * | 2010-01-19 | 2011-08-15 | Bosch Gmbh Robert | METHOD FOR TEMPERATING AN INJECTOR OF INJECTION FOR THE INJECTION OF FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE |
| EP2426344B1 (en) | 2010-09-07 | 2015-02-25 | Caterpillar Motoren GmbH & Co. KG | Heating system for an internal combustion engine |
| DE102013000606A1 (en) * | 2013-01-16 | 2014-07-17 | Man Diesel & Turbo Se | Fuel supply system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0968123A (en) * | 1995-09-04 | 1997-03-11 | Mitsubishi Heavy Ind Ltd | Fuel temperature raising device |
| JPH10153149A (en) | 1996-11-25 | 1998-06-09 | Isuzu Ceramics Kenkyusho:Kk | Fuel heating device in engine using heavy oil as fuel |
| FI107831B (en) | 1998-05-20 | 2001-10-15 | Waertsilae Tech Oy Ab | Fuel Supply System |
| DE10157135B4 (en) * | 2001-11-21 | 2004-03-11 | Man B & W Diesel Ag | Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders |
| DE10341708B4 (en) * | 2003-09-10 | 2012-05-03 | Man Diesel & Turbo Se | reciprocating internal combustion engine |
-
2006
- 2006-05-12 JP JP2006133586A patent/JP4121531B2/en not_active Expired - Fee Related
- 2006-06-06 CN CN200610083375A patent/CN100578000C/en not_active Expired - Fee Related
- 2006-06-07 KR KR1020060050968A patent/KR100749277B1/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251047B (en) * | 2007-02-22 | 2012-10-10 | 曼柴油机和涡轮公司,德国曼柴油机和涡轮欧洲股份公司的联营公司 | Large two-stroke dual-fuel diesel engine |
| CN103384761A (en) * | 2011-01-26 | 2013-11-06 | 卡特彼勒公司 | Dual fuel injector for a common rail system |
| CN103384761B (en) * | 2011-01-26 | 2016-05-25 | 卡特彼勒公司 | For the dual fuel injector of common rail system |
| CN105473843A (en) * | 2013-08-20 | 2016-04-06 | 瓦锡兰芬兰有限公司 | Fuel injection circuit and method for operating a multi-fuel piston engine |
| CN105518284A (en) * | 2013-08-20 | 2016-04-20 | 瓦锡兰芬兰有限公司 | Fuel injection system and method for operating a multi-fuel piston engine |
| CN105473843B (en) * | 2013-08-20 | 2019-02-12 | 瓦锡兰芬兰有限公司 | Fuel injection circuit and the operation piston-engined method of multi fuel |
| CN105518284B (en) * | 2013-08-20 | 2019-02-12 | 瓦锡兰芬兰有限公司 | For running the fuel injection system and method for multi fuel piston-mode motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100578000C (en) | 2010-01-06 |
| JP4121531B2 (en) | 2008-07-23 |
| JP2007303404A (en) | 2007-11-22 |
| KR100749277B1 (en) | 2007-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100578000C (en) | Common rail fuel injection system with fuel circulation device for a large two-stroke diesel engine | |
| CN101275527B (en) | Cam driven exhaust fuel injection system for large two-stroke diesel engine | |
| KR101195441B1 (en) | Large uniflow two-stroke diesel engine of the crosshead type | |
| CN101970812B (en) | Large two-stroke diesel engine with electronically controlled exhaust valve actuation system | |
| CN101818668B (en) | Crosshead type large two-stroke diesel engine | |
| JP5079916B2 (en) | Cam-driven exhaust valve actuation system for large two-cycle diesel engines | |
| CN101449051B (en) | Crosshead type large two-stroke diesel engine and its operation method | |
| CN108167070A (en) | For the independent lubricating oil oil supply system of marine low speed diesel engine booster | |
| KR101438189B1 (en) | A large slow-running turbocharged two-stroke uniflow internal combustion engine with crossheads and a cam driven exhaust valve actuation system | |
| CN109973272B (en) | Low-speed diesel engine | |
| CN102251895B (en) | Crosshead-shaped large uniflow-type dual-stroke diesel engine | |
| JP5552146B2 (en) | Cam-driven exhaust valve actuation system for large two-cycle diesel engines | |
| CN103375220A (en) | Effective lubricant processing device used for starlike engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MAN DIESEL AND TURBINE COMPANY, MAN DIESEL ENGINES Free format text: FORMER NAME: MANDIESEL CORPORATION DK, MAN DIESEL ENGINES EUROPE AG ASSOCIATES Owner name: MANDIESEL CORPORATION DK Free format text: FORMER NAME: MAN B + W DIESEL AS. Owner name: MANDIESEL CORPORATION DK, MAN DIESEL ENGINES EUROP Free format text: FORMER NAME: MANDIESEL CORPORATION DK |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Copenhagen, Denmark Patentee after: Mann Diesel & Turbine, an associate company of Mann Diesel & Turbine Europe AG Address before: Copenhagen, Denmark Patentee before: MAN DIESEL & TURBO DEUTSCHLAND Address after: Copenhagen, Denmark Patentee after: MAN DIESEL & TURBO DEUTSCHLAND Address before: Copenhagen, Denmark Patentee before: MAN DIESEL A/S Address after: Copenhagen, Denmark Patentee after: MAN DIESEL A/S Address before: Copenhagen, Denmark Patentee before: MAN B & W DIESEL A/S |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20140606 |