CN1086017C - Method and apparatus for fuel injection for reciprocating piston combustion engine - Google Patents
Method and apparatus for fuel injection for reciprocating piston combustion engine Download PDFInfo
- Publication number
- CN1086017C CN1086017C CN96117261A CN96117261A CN1086017C CN 1086017 C CN1086017 C CN 1086017C CN 96117261 A CN96117261 A CN 96117261A CN 96117261 A CN96117261 A CN 96117261A CN 1086017 C CN1086017 C CN 1086017C
- Authority
- CN
- China
- Prior art keywords
- nozzle
- nozzles
- injection
- fuel
- opened
- 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.)
- Expired - Lifetime
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The method involves opening the nozzles in a variable sequence. The total fuel quantity for a working cycle is injected via a single nozzle, esp. for partial engine loading. The injection valves are opened at different crankshaft angles and the sequence of opening is varied between successive operating cycles. The difference in crankshaft angles at which the valves are opened is at least 4 degrees. The injection process for all injection nozzles is terminated simultaneously. A sensor connected to a controller determines the crankshaft angle. Two controllable injection devices with nozzles or two directly driven nozzles can be used.
Description
The present invention relates under the situation that two nozzles are set at least, fuel oil to be sprayed in the combustion chamber of air cylinder of diesel formula low speed two stroke reciprocating type piston IC engines method.The invention still further relates to the equipment that the method according to this invention turns round.
The method of the burner oil of diesel engine can be known from EP0586775.Wherein, fuel sprays into the firing chamber by two nozzles in the time of staggering, and wherein first nozzle is opened, and after a while, second nozzle is opened when first nozzle is still opened.Nozzle has by closing spring and keeps the nozzle needle close, simultaneously the size of closing spring set have different intensity with/different bias power arranged.
The shortcoming of this known method is to produce high uneven temperature load and/or ablate (corroding abrasion) in the firing chamber.
The purpose of this invention is to provide the method in a kind of combustion chamber of air cylinder that fuel oil is sprayed into diesel formula low speed two stroke reciprocating type piston IC engines, can overcome above-mentioned shortcoming.
The present invention also has a purpose to be to provide a kind of equipment of implementing said method.
The present invention also has a purpose to be to provide a kind of internal-combustion reciprocating-pisto that has the said equipment or implement said method.
This purpose has been reached by following technical proposal.Be about to the method in the combustion chamber of air cylinder that fuel oil sprays into diesel formula low speed two stroke reciprocating type piston IC engines, a certain amount of fuel oil that wherein is intended for use work cycle sprays into the firing chamber by at least two nozzles, nozzle is opened in order, it is characterized in that, nozzle is sentenced selectable order at different crank angles and is opened, freely to be controlled at the fuel mass flow that enters cylinder in the work cycle.
Purpose of the present invention has also further been reached by the equipment of using method of the present invention.
Purpose of the present invention is provided with at least two nozzles and has reached according to the method for different sequential activation nozzles simultaneously by fuel being sprayed into the combustion chamber of air cylinder of diesel formula low speed two stroke reciprocating type piston IC engines.Particularly for the localised load running, for a fuel quantity that working stroke provided is sprayed by a nozzle, and in continuous work cycle, the actuation sequence of nozzle is different.
Purpose of the present invention has further reached by following method, being about to fuel sprays in the firing chamber of cylinder of diesel engine, spray by at least two nozzles for a whole fuel quantity that working stroke provided simultaneously, and nozzle was opened in the different moment, and the order that nozzle is opened is different in continuous work cycle.In continuous course of injection, the actuation sequence of nozzle changes, and make that a nozzle is at first opened in first course of injection, and in course of injection subsequently, the another one nozzle is opened at first.The advantage of this injection method is that the thermal stress that particularly produces at the cylinder cap place in the firing chamber is even.Therefore, be subjected to the zone of very high thermal stress respectively on cylinder cap and piston, promptly so-called ' focus ' avoided.Therefore the metal loss that is caused by ablation on cylinder cap and piston can be prevented from.In addition, because maximum temperature reduces in the firing chamber, also make cooling require to reduce.Avoiding other advantage in high thermal stress zone is such as cylinder cap, and piston and cylinder insert possible less that surface or the like firing chamber part cracks.
Two even more nozzle can be arranged on cylinder of diesel engine the firing chamber in.These nozzles are activated by control gear by this way, make them begin their course of injection in the different moment, and in continuous course of injection, the actuation sequence of nozzle change.
Explain the present invention below in conjunction with accompanying drawing according to listed examples, wherein;
Fig. 1 is the layout plan of the course of injection of two nozzles;
Fig. 2 is the planimetric map of 1 cylinder cap of arranging with reference to the accompanying drawings;
Fig. 3 is the another one embodiment of course of injection;
Fig. 4 a, 4b illustrate the method that activates two nozzles;
Fig. 4 c is another method that activates three nozzles;
Fig. 5 is the another one embodiment of injection apparatus;
Shown in Figure 1 be according in a plurality of cylinders of the low speed that the is shown specifically two stroke reciprocating type piston IC engines of diesel process running a cylinder 44.Working piston 45 is guided in this cylinder 44 so that move up and down.Working piston 45 and the cylinder cap 46 that is placed on the cylinder 44 limit a firing chamber 43 together, and liquid fuel is spurted in this firing chamber by one first nozzle 1a and one second nozzle 1b.An outlet valve that does not give illustrating is placed on the central authorities of cylinder cap 46, therefore longitudinally scavengedly occurs in the cylinder 44 when working piston 45 begins to move up.Each has a nozzle needle 7 the first nozzle 1a of known structure form and the second nozzle 1b, and this needle-valve is pressed in valve seat location 1 ' by the effect of closing spring 8 and locates.Under valve seat location 1 ', a blind hole is arranged in the nozzle body, and spray orifice 2 begins to feed firing chamber 43 from this blind hole.A pressure chamber 10 is arranged in the nozzle body and is positioned on the valve seat location 1 ', and links to each other with 40b with injection apparatus 40a with 9b by pressure piping 9a.Injection phase at nozzle 1a and 1b, the fuel pressure that is conducted to pressure chamber 10 by pressure piping 9a and 9b is very big, so that can overcome the closure function power of spring 8, and nozzle needle 7 is lifted away from valve seat location 1 ', makes fuel oil to enter firing chamber 43 by spray orifice 2.A pipeline 42 is connected on the housing of nozzle 1a and 1b, is used to carry the fuel oil of leakage.Injection apparatus 40a and 40b carry out work by this way, i.e. beginning of course of injection and end can be controlled by electric control circuit 41a and 41b.Injection apparatus 40a and 40b can also work by this way, that is, the amount of fuel of being sprayed also can be controlled by electric control circuit 46a and 46b.Two injection apparatus 40a, each is connecting an oil feed line 47a and 47b 40b.A control gear 50 is by electric control circuit 41a and 41b, and also electric control circuit 46a and the 46b by final appearance controlling injection apparatus 40a and 40b, thereby the valve of nozzle 1a and 1b is opened and closed.This control gear 50 is connected on the sensor 52 by an electric signal circuit 50b, and this sensor monitors the rotation angle of the bent axle 53 of internal-combustion reciprocating-pisto.In addition, control gear 50 is connecting an input-output equipment 51 by an electric signal circuit 50a, by this input-output equipment 51, can determine controlling value and show state value.
Accompanying drawing 2 shows the planimetric map of the cylinder cap 46 that nozzle 1a and 1b be placed on it.Fuel sprays along direction mode with jet from spray orifice 2 of arrow A.Air flow into and working piston 45 up during, the rotation eddy current (arrow B) of generation combustion air in firing chamber 43.During fuel combustion, can high-temperature area appear at the position shown in 46c of cylinder cap 46 and piston 45.If all nozzles as one man activate, this zone 46c can be heated to higher temperature, and because this activates the existence of eddy current, the hottest gas can constantly enter the same area 46c.
Accompanying drawing 4a and 4b show fuel and spurt into the process of the firing chamber 43 of cylinder 44 according to the present invention, and particularly quality of fuel flow m is with the situation of change of crank angle w.Mass flow rate m is the fuel quantity that refers to per unit time or per unit corner respectively.In accompanying drawing 4a, nozzle 1a at first opens, and a later moment, or say so at a bigger crank angle place, nozzle 1b opens.The course of injection of two nozzle 1a and 1b is interfered simultaneously.Accompanying drawing 4b shows the another one course of injection, is this process, and nozzle 1b at first opens, and a later moment, nozzle 1a opens.Control gear 50 activates injection apparatus 40a and 40b like this thereby activates nozzle 1a and 1b, and for example for continuous course of injection, nozzle 1a or nozzle 1b alternately at first open, and then, a later moment, another one nozzle 1a or 1b open.The variation that activates the order of nozzle 1a and 1b can be carried out according to a large amount of possibilities.Therefore, all right, for example, in each process of two continuous courses of injection, all at first open nozzle 1a, in two courses of injection subsequently, all at first open nozzle 1b then.
Accompanying drawing 4c shows another variation that nozzle activates, and in this example, three spray into the nozzle 1a of firing chamber 43 with fuel, and 1b and 1c are arranged on the cylinder cap 46.Shown in actuation sequence in, at first, nozzle 1a opens at crank angle 0 degree, a later moment, promptly at a bigger crank angle place, nozzle 1b opens, and at a bigger crank angle place, nozzle 1c opens, all three nozzle 1a, 1b, 1c close when crank angle 20 is spent.In the nethermost figure of accompanying drawing 4c, show by all three nozzle 1a, 1b, 1c spray in the firing chamber 43 the total mass flow rate of fuel situation about changing with crank angle.
Injection apparatus 40a, 40b can carry out work like this, and the fuel quantity that make to spray also can be controlled, and therefore, by control gear 40, nozzle 1a not only, 1b, the opening and closing of 1c and the total mass flow rate of fuel also can be controlled and be regulated.
Accompanying drawing 3 shows the another one listed examples of injection apparatus and nozzle 1a.Nozzle 1a has 7, one pistons 64 of a nozzle needle to be connected on the needle-valve.A spring 65 is pressed into operating position with nozzle needle 7.By pipeline 61, the fuel oil that injection apparatus 60 is supplied with under the pressure that enters pressure chamber 10 produces pressure on piston 64, whereby nozzle needle 7 is mentioned, thereby fuel can eject as the jet A of emission at spray orifice 2 places.Shown in listed examples in, the mentioning partly or prevent by piezoelectric actuator 66 fully of nozzle needle 7.Piezoelectric actuator 66 is activated by control gear 50 by activating circuit 41a.Piezoelectric actuator 66 particularly can be activated by pulse width modulating signal, therefore comprises that this actuator of a plurality of piezoelectric layers can very accurately be controlled under high speed.The starting point of opening of nozzle needle 7, its stroke of mentioning speed and nozzle needle 7 can be instantaneous ground, accurately, controlled exactly and promptly.Control gear 50 comprises and is used for regulating instantaneous actuatings and the fuel flow rate by nozzle 1a and thereby being subjected to the electronic equipment of the position of its nozzle needle that influences 7 by piezoelectric element 66.
Accompanying drawing 5 schematically and the local listed examples that shows an injection apparatus 40a who fuels by high-pressure service pump 80 and accumulator 81 with section.The passage 68 of the rear side that passes to the metering piston 70 that plays a stepped piston effect comes out to enter in inlet passage 67 branches of fuel, and enter main passage 69, by main passage 69, fuel oil is transported to inlet passage part 123 through the groove 141 of control piston 100 again.When the control with input circuit and return loop activated with the control oil under the pressure with the control valve 91 of hydraulic equipment 90,143 of the fronts of control piston 100 moved down.This pre-control valve receives its control command of guaranteeing that fuel injection process occurs in the correct moment and sprays with correct amount from control electrical installation 50.Therefore, for example, will pass to control gear 50 by being electrically connected circuit 50b from the angular signal of the sensor 52 that is placed on bent axle 3 places.For example monitoring axle 74 position and the signal conveys of the position of relevant metering piston 70 given for one and controlling electrical installation 50 with the sensor 73 of inductance principle work.Therefore, can determine and change the amount of each course of injection institute injected fuel.
When control piston 100 moves down, connection between main passage 69 and the inlet passage part 123 is at first interrupted, then, output channel 124 links to each other with injection channel 9a by the groove 142 at control piston 100 places, and passage 9a passes to the nozzle 1a of the cylinder 44 of diesel engine.Metering piston 70 is moved by the pressure that the fuel oil by passage 68 acts on metering piston rear side 72.Fuel oil is sprayed into firing chamber 43.The return path that is used to control oil if pre-control valve 91 is closed is opened, and so, control piston 100 will upwards be promoted by the fuel pressure and the acting force of the spring of the front 144 that acts on control piston 100.Fuel delivery to passage 9a is cut off, thereby sprays and finish.In accompanying drawing 5, only show the second nozzle 1b that feeds firing chamber 43.But this nozzle 1b comes fueling by the identical unshowned spraying equipment 40 with spraying equipment 40a of another one.
At control piston 100 places, for example realized continuous seal at 5 sealing stations for fuel oil under high pressure.At most important sealing station, promptly the position that is connected with nozzle 1a realizes sealing with a seat valve 145, and therefore pipeline 9a is not under the pressure between each course of injection.Seat valve 145 is sealed fully in closed position.By this measure, can prevent uncontrolled injection.For other each sealing 146, adopted the precision-fit of control piston 100, thereby fuel leakage in a small amount allows, and can turn back to fuel tank by return passage 127.
Claims (5)
1. the method in the combustion chamber of air cylinder that fuel oil is sprayed into diesel low speed two stroke reciprocating type piston IC engines,
A certain amount of fuel oil that wherein is intended for use work cycle sprays into the firing chamber by at least two nozzles, nozzle is opened in order, it is characterized in that, nozzle is sentenced selectable order at different crank angles and is opened, freely to be controlled at the fuel mass flow that enters cylinder in the work cycle.
2. the method for claim 1 is characterized in that, in work cycle subsequently, injection order is a circulation change.
3. the method for claim 1 is characterized in that, the crank angle between two nozzles are opened is 4 degree at least.
4. the method for claim 1 is characterized in that, the course of injection of all nozzles stops simultaneously.
5. equipment of implementing any one described method among the claim 1-4, comprise a control gear (50), a sensor that is used to detect crank angle (52) that is connected with this control gear (50), it is characterized in that, each cylinder all have at least two injection apparatus that can independently control (40a, 40b), each is all connecting a nozzle (1a, 1b) or at least two nozzles that directly can control (1a, 1b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95810733A EP0775821B1 (en) | 1995-11-24 | 1995-11-24 | Method and apparatus for injecting fuel in a reciprocating internal combustion engine |
| EP95810733.6 | 1995-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156789A CN1156789A (en) | 1997-08-13 |
| CN1086017C true CN1086017C (en) | 2002-06-05 |
Family
ID=8221823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117261A Expired - Lifetime CN1086017C (en) | 1995-11-24 | 1996-11-22 | Method and apparatus for fuel injection for reciprocating piston combustion engine |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0775821B1 (en) |
| JP (1) | JP3896178B2 (en) |
| KR (1) | KR100443036B1 (en) |
| CN (1) | CN1086017C (en) |
| DE (1) | DE59508329D1 (en) |
| DK (1) | DK0775821T3 (en) |
| FI (1) | FI108313B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPZ990004A1 (en) * | 1999-10-04 | 2001-04-04 | Cosimo Sarno | MULTI-INJECTOR SYSTEMS. |
| TW491930B (en) * | 2000-10-10 | 2002-06-21 | Waertsilae Nsd Schweiz Ag | Method for the injection of fuel |
| JP5693189B2 (en) * | 2010-12-08 | 2015-04-01 | 三菱重工業株式会社 | Fuel injection apparatus for internal combustion engine and fuel injection method for internal combustion engine |
| DE102017102792B4 (en) * | 2017-02-13 | 2024-06-27 | Ktm Ag | Two-stroke internal combustion engine |
| DE102018104856B4 (en) * | 2018-03-02 | 2020-06-10 | Mtu Friedrichshafen Gmbh | Method for operating an internal combustion engine and fuel injection system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR967693A (en) * | 1948-06-07 | 1950-11-09 | Improvement in injection engines | |
| US4463733A (en) * | 1983-02-15 | 1984-08-07 | Deere & Company | Closed loop fuel injection timing control |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR840465A (en) * | 1937-08-06 | 1939-04-26 | Porsche Kg | Fast running internal combustion engine, in particular for motor vehicles and airplanes |
| US2640422A (en) * | 1946-12-03 | 1953-06-02 | Texas Co | Fuel pump for internal-combustion engines |
| JPS5438439A (en) * | 1977-08-30 | 1979-03-23 | Agency Of Ind Science & Technol | Fuel injection for pump multiple injection |
| US4610427A (en) * | 1984-04-17 | 1986-09-09 | Nippon Soken, Inc. | Piezoelectric control valve for fuel injector of internal combustion engine |
| DK0586775T3 (en) | 1992-09-11 | 1996-08-26 | New Sulzer Diesel Ag | Method of Fuel Injection by Diesel Combustion Engines |
-
1995
- 1995-11-24 EP EP95810733A patent/EP0775821B1/en not_active Expired - Lifetime
- 1995-11-24 DE DE59508329T patent/DE59508329D1/en not_active Expired - Lifetime
- 1995-11-24 DK DK95810733T patent/DK0775821T3/en active
-
1996
- 1996-10-24 JP JP28240696A patent/JP3896178B2/en not_active Expired - Lifetime
- 1996-11-15 KR KR1019960054441A patent/KR100443036B1/en active IP Right Grant
- 1996-11-20 FI FI964633A patent/FI108313B/en not_active IP Right Cessation
- 1996-11-22 CN CN96117261A patent/CN1086017C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR967693A (en) * | 1948-06-07 | 1950-11-09 | Improvement in injection engines | |
| US4463733A (en) * | 1983-02-15 | 1984-08-07 | Deere & Company | Closed loop fuel injection timing control |
Also Published As
| Publication number | Publication date |
|---|---|
| DK0775821T3 (en) | 2000-08-07 |
| EP0775821B1 (en) | 2000-05-10 |
| FI108313B (en) | 2001-12-31 |
| KR970027781A (en) | 1997-06-24 |
| FI964633A0 (en) | 1996-11-20 |
| FI964633A (en) | 1997-05-25 |
| JP3896178B2 (en) | 2007-03-22 |
| JPH09170525A (en) | 1997-06-30 |
| KR100443036B1 (en) | 2004-11-03 |
| EP0775821A1 (en) | 1997-05-28 |
| CN1156789A (en) | 1997-08-13 |
| DE59508329D1 (en) | 2000-06-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: WATEXILA SWITZERLAND LTD. Free format text: FORMER OWNER: NEW SULZER DIESEL AG Effective date: 20011130 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20011130 Applicant after: Wartsila Schweiz AG Applicant before: New Sulzer Diesel AG |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020605 |
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| EXPY | Termination of patent right or utility model |