EP3857043A1 - Wassereinspritzsystem sowie verfahren zum betreiben eines wassereinspritzsystems - Google Patents
Wassereinspritzsystem sowie verfahren zum betreiben eines wassereinspritzsystemsInfo
- Publication number
- EP3857043A1 EP3857043A1 EP19773398.3A EP19773398A EP3857043A1 EP 3857043 A1 EP3857043 A1 EP 3857043A1 EP 19773398 A EP19773398 A EP 19773398A EP 3857043 A1 EP3857043 A1 EP 3857043A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- pump
- rail
- bank
- injection system
- 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.)
- Withdrawn
Links
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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
-
- 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
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0227—Control aspects; Arrangement of sensors; Diagnostics; Actuators
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/028—Adding water into the charge intakes
-
- 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
Definitions
- the invention relates to a water injection system for an internal combustion engine with the features of the preamble of claim 1. Furthermore, the invention relates to a method for operating a water injection system, which in particular can be a water injection system according to the invention.
- DE 10 2015 208 472 A1 shows an example of an internal combustion engine with a water injection device which has a water tank for storing water. ser, a pump for conveying the water and a water injection valve for injecting water.
- the pump is connected on the inlet side to the water tank via a first line and on the outlet side to the water injection valve via a second line.
- the pump is arranged above the water tank so that it can be emptied by gravity.
- the pump can be operated in the opposite direction of delivery.
- systems which, in addition to the components already mentioned, comprise a pressure sensor and / or a shut-off device.
- the function of the system and / or individual system components for example the rail or the injection valve, can be monitored. Leakage can also be detected. If the pump can be operated in the opposite direction of flow, the system can be drained by means of suction.
- the present invention has for its object to ben a water injection system for an internal combustion engine with several banks arranged cylinders ben, which can be operated as efficiently as possible.
- the proposed for a multi-cylinder internal combustion engine water injection system comprises a water tank, a pump and a rail, to which at least one injection valve for injecting water into an intake manifold of the internal combustion engine is connected.
- the plurality of cylinders are arranged in banks, with the internal combustion engine having at least a first bank and a second bank and with each bank being assigned a rail, each with at least one injection valve.
- the water taken from the water tank can be distributed to the several banks. It is not necessary for each rail to be connected to its own water tank. This means that a single water tank is sufficient to supply the multiple rails with water. In this way, the water injection system can be simplified since not all components of the water injection system have to be kept in a number corresponding to the number of banks.
- the multi-bank engines include, for example, 6, 8, or 12-cylinder V engines, 12-cylinder W engines, and also 4- or 6-cylinder boxer engines.
- the proposed water injection system is therefore especially designed for such engines.
- a pump is assigned to each rail and thus to each bank.
- each rail can be filled with water separately and emptied if necessary, provided the direction of delivery of the respective pump is reversible.
- the plurality of pumps are preferably connected to the same water tank for the removal of water, so that the advantage of a single water tank is retained.
- a single pump for supplying the rails with water from the water tank is provided.
- the direction of delivery of the pump is preferably reversible, so that both filling and emptying of the several rails can be effected.
- Different strategies can also be used for filling and / or emptying the rails with just one pump, which not only enable the several rails to be filled and / or emptied at different times.
- the pump for emptying at least one rail is operated in a suckback mode, that is, in the opposite direction of conveyance, it can be sucked back by rail or bank.
- rail or bank can be sucked back alternately, with only one injection valve per rail or bank is opened. It is preferable to start with the ice spray valve that is furthest away from the pump.
- the rails can be emptied at the same time by opening all the injection valves simultaneously.
- the filling can also be carried out rail-wise or bank-wise, rail-wise or bank-wise alternately, similarly to emptying, preferably starting again with the most distant injection valve, or carried out simultaneously. It is also possible to fill in the firing order.
- At least one pressure sensor is preferably provided.
- the pressure in the system or in individual components of the system can be monitored using the pressure sensor. Malfunctions and / or leaks can be identified based on the pressure.
- the pressure sensor is preferably arranged downstream of the at least one pump, that is to say on the pressure side of the pump. If a pump is assigned to each rail, a pressure sensor is preferably arranged downstream of each pump.
- At least one shut-off device for example a shut-off valve, is preferably provided.
- at least two rails can be filled and / or emptied independently of one another with water. This applies in particular if the filling and / or emptying of the several rails is to be effected with only one pump.
- the at least one shut-off device is preferably arranged between the at least one pump and a rail. In this way, the flow can be interrupted in a water pipe using the shut-off device, which connects the pump to the at least one rail.
- a shut-off device is advantageously provided for each rail, the shut-off device being arranged in a water line connecting the rail to the pump. By closing the several shut-off devices at different times, each rail can be filled and / or emptied individually.
- a multi-way valve can also be provided. The amount of water delivered can be distributed over the multiple rails in a particularly simple manner using the multi-way valve.
- water is removed from a water tank with the help of a pump, fed to a rail and injected into an intake manifold of the internal combustion engine by means of at least one injection valve connected to the rail.
- water removed from the water tank is supplied at the same time or at different times to a plurality of rails, each with at least one injection valve, each rail being assigned to a bank of the internal combustion engine having a plurality of cylinders.
- the process enables the multiple rails to be efficiently supplied with water from a common water tank. Because system components, for example an additional water tank and water pipes, can be saved. In addition, different filling strategies can be implemented, so that the water injection system can be operated as required.
- each rail can be supplied with water from the water tank by means of a pump.
- the rails can therefore be filled independently of each other. If the pumps can be operated in the opposite direction of delivery, the rails can also be emptied independently of one another.
- the filling and / or emptying of the plurality of rails can be carried out in banks, one after the other, alternately in banks, preferably in each case with the most distant with respect to the pump injector is started, or performed simultaneously.
- the filling can also be carried out in the order of ignition. This means that the same strategies previously described in connection with the water injection system can be implemented. In this respect, reference is made to the corresponding explanations above.
- the pressure downstream of the pump or pumps is advantageously monitored using at least one pressure sensor.
- Pressure monitoring enables any malfunctions and / or leaks to be detected, so that the functional reliability of the system increases.
- the pressure is preferably monitored with the aid of a plurality of pressure sensors, so that an adjustment can be carried out for plausibility checking.
- At least one shut-off device for example a shut-off valve, is preferably actuated so that the pressure in the injection system is maintained. This enables the system to be reactivated more quickly.
- the at least one shut-off device can also be used to carry out a system diagnosis.
- FIG. 1 is a schematic representation of a water injection system according to the invention according to a first preferred embodiment
- FIG. 2 shows a schematic representation of an internal combustion engine with a water injection valve of a water injection system arranged on an intake manifold
- FIG. 3 shows a schematic illustration of a water injection system according to the invention in accordance with a second preferred embodiment
- FIG. 4 shows a schematic illustration of a water injection system according to the invention in accordance with a third preferred embodiment
- Fig. 5 is a schematic representation of a water injection system according to the invention according to a fourth preferred embodiment
- Fig. 6 is a schematic representation of a water injection system according to the invention according to a fifth preferred embodiment.
- FIG. 1 shows a water injection system for an internal combustion engine 1, which comprises a plurality of cylinders 2 arranged in banks.
- four cylinders 2 are combined to form a first bank 8 and a second bank 9.
- Each of the banks 8, 9 is assigned a rail 5, 10, four injection valves 6, 11 being connected to each rail 5, 10 for injecting water.
- the injection valves 6, 11 are each arranged on a suction pipe 7 which serves to supply the cylinders 2 with combustion air (see FIG. 2).
- the injected into the intake manifold 7 te water is then fed together with the combustion air via an inlet valve 18 to the respective cylinder 2.
- water and combustion air mix with fuel that has been injected directly into cylinder 2 using a fuel injector 21.
- the mixture is compressed via the stroke movement of a piston 20 accommodated in the cylinder 2.
- Exhaust gases arising during combustion are discharged from the cylinder 2 via an exhaust valve 19.
- the water injection system shown in FIG. 1 has a water tank 3 and a water pipe 22 which branches.
- a first branch 23 is used to connect the first rail 5 to the water tank 3 and a second branch 24 is used to connect the second rail 10 to the water tank 3.
- each branch 23, 24 there is a pump 4, 12, by means of which the respective rail 5, 10 can be filled with water from the water tank 3.
- the pumps 4, 12 can preferably also be operated in the opposite direction of conveyance, so that if necessary, in particular when the internal combustion engine 1 is switched off, it is possible to empty the respective rail 5, 10.
- a filter 17 is arranged in the water line 22.
- the water line 22 has a shut-off device 15.
- a pressure sensor 13, 14 is provided, by means of which the pressure in the respective branch 23, 24 and in the respective rail 5, 10 can be monitored. A noticeable change in pressure indicates a malfunction and / or leakage, so that the pressure sensor 13, 14 also has a diagnostic function.
- FIG. 3 shows a further development of the water injection system from FIG. 1.
- This consists in dispensing with the further pump 12 and filling both rails 5, 10 with the aid of one pump 4 and emptying them if necessary.
- only one pressure sensor 13 is provided.
- the pump 4 and the pressure sensor 13 are arranged in the water line 22, which branches only after the pressure sensor 13.
- This system also allows monitoring of the system or a system component by means of the pressure sensor 13 for function and / or leakage. Sucking back for emptying the rails 5, 10 is also possible with the one pump 4.
- Different strategies can be implemented. For example, it can be sucked back in banks.
- all the injection valves 6 of the bank 8 are first opened at the same time and closed again after a defined time.
- both rails 5, 10 can be emptied in time by opening all the injection valves 6, 11 simultaneously and closing them again after a defined time.
- the same procedure can be followed when filling the two rails 5, 10.
- the filling can be carried out in such a way that the respective injection valves 6, 11 are opened in the firing order.
- FIG. 4 shows a further preferred embodiment of a water injection system according to the invention. Regardless of the other illustration, which serves for simplification, the embodiment of FIG. 4 differs from that of FIG. 3 in that a pressure sensor 13, 14 is provided in each branch 23, 24. The pressure sensors 13, 14 are thus installed close to the rail. Using the pressure sensors 13, 14 Bank-wise monitoring and diagnosis of the rails 5, 10 and the injection valves 6, 11 can be carried out. In addition, the two pressure sensors 13, 14 can be compared for plausibility checking.
- FIG. 5 Another preferred embodiment of a water injection system according to the invention is shown in FIG. 5. It largely corresponds to the embodiment of FIG. 3, but two shut-off devices 15, 16 are provided, each branch 23, 24 of the water line 22 having a shut-off device 15, 16. The arranged in the water line 22 upstream of the pump 4 Absperrvorrich device 15 can thus be omitted. With the help of the two shut-off devices 15, 16, which may be shut-off valves, for example, both rails 5, 10 can be filled and / or emptied separately or individually. For this purpose, only one shut-off device 15, 16 is opened, while the other shut-off device 16, 15 is closed. In the case of inactive water injection, the pressure in the system can also be kept by closing both shut-off devices 15, 16.
- the two shut-off devices 15, 16 which may be shut-off valves, for example, both rails 5, 10 can be filled and / or emptied separately or individually. For this purpose, only one shut-off device 15, 16 is opened, while the other shut-off device 16, 15 is
- shut-off devices 15, 16 can also be used to alternately carry out a system diagnosis bank or rail-wise by means of the one pressure sensor 13 by opening or closing accordingly. In this way, leakages in the rails 5, 10, in the branches 23, 24 and / or in the injection valves 6, 11 can be detected.
- a multi-way valve can also be used (not shown).
- the water injection system of FIG. 5 can also be modified in such a way that a pressure sensor 13, 14 is provided in each branch 23, 24.
- the pressure sensor 13 originally arranged in the water line 22 can thus be dispensed with.
- This system has the advantage that it is possible to maintain pressure with a separate, bank-specific pressure evaluation and system diagnosis.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018216411.8A DE102018216411A1 (de) | 2018-09-26 | 2018-09-26 | Wassereinspritzsystem sowie Verfahren zum Betreiben eines Wassereinspritzsystems |
PCT/EP2019/075133 WO2020064495A1 (de) | 2018-09-26 | 2019-09-19 | Wassereinspritzsystem sowie verfahren zum betreiben eines wassereinspritzsystems |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3857043A1 true EP3857043A1 (de) | 2021-08-04 |
Family
ID=68051782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19773398.3A Withdrawn EP3857043A1 (de) | 2018-09-26 | 2019-09-19 | Wassereinspritzsystem sowie verfahren zum betreiben eines wassereinspritzsystems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3857043A1 (de) |
DE (1) | DE102018216411A1 (de) |
WO (1) | WO2020064495A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111963343A (zh) * | 2020-07-17 | 2020-11-20 | 南京航空航天大学 | 一种新型重油掺水装置及工作方法 |
DE102021115308B3 (de) | 2021-06-14 | 2022-07-14 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verbrennungsmotor und Verfahren zum Betreiben eines Verbrennungsmotors |
DE102023106197B3 (de) | 2023-03-13 | 2024-05-08 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zur Leckagediagnose eines Wassereinspritzsystems, Vorrichtung zur Durchführung des Verfahrens und Verbrennungsmotor aufweisend wenigstens eine solche Vorrichtung |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6705253B2 (en) * | 2002-03-11 | 2004-03-16 | Edward J. Lesniak | Electronic controlled emission and fluid injection system for an internal combustion engine |
US9016244B2 (en) * | 2013-04-23 | 2015-04-28 | Ford Global Technologies, Llc | Engine control for catalyst regeneration |
DE102015208472A1 (de) | 2015-05-07 | 2016-11-10 | Robert Bosch Gmbh | Wassereinspritzvorrichtung einer Brennkraftmaschine |
US9976502B2 (en) * | 2016-08-02 | 2018-05-22 | Ford Global Technologies, Llc | Methods and system for injecting water at different groups of cylinders of an engine |
-
2018
- 2018-09-26 DE DE102018216411.8A patent/DE102018216411A1/de not_active Withdrawn
-
2019
- 2019-09-19 WO PCT/EP2019/075133 patent/WO2020064495A1/de unknown
- 2019-09-19 EP EP19773398.3A patent/EP3857043A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102018216411A1 (de) | 2020-03-26 |
WO2020064495A1 (de) | 2020-04-02 |
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