EP3642469A1 - Water injection device of an internal combustion engine - Google Patents
Water injection device of an internal combustion engineInfo
- Publication number
- EP3642469A1 EP3642469A1 EP18729077.0A EP18729077A EP3642469A1 EP 3642469 A1 EP3642469 A1 EP 3642469A1 EP 18729077 A EP18729077 A EP 18729077A EP 3642469 A1 EP3642469 A1 EP 3642469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- shut
- injection device
- water injection
- internal combustion
- 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- Withdrawn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
- 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
- F02M25/0222—Water recovery or storage
-
- 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
- F02M25/0225—Water atomisers or mixers, e.g. using ultrasonic waves
-
- 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
-
- 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 present invention relates to a water injection device of a
- Knock tendency and high exhaust gas temperatures is limited.
- One possible measure to reduce the tendency to knock and to lower the exhaust gas temperatures is the
- a water tank In water injection systems for internal combustion engines, a water tank is normally provided so that at any time water for injection into the intake manifold or the
- Combustion chamber of the internal combustion engine is available.
- water can be obtained by means of a water extraction plant
- water can be conveyed by means of a pump via a distributor device to injection valves, through which the water is then injected, for example, into a suction pipe or a combustion chamber of the internal combustion engine.
- the distributor device can be provided to store water and to distribute it to a plurality of injectors, through which the water can then be injected.
- the pump used to convey the water is switched off. This means that the water is in the water injectors and the lines of the water injection system. Due to the high temperatures of the parts of the internal combustion engine near the
- Water injection system can heat the stagnant water and eventually vaporize. This effect is exacerbated when driving at high altitude, where the air pressure is lower.
- the formation of steam can lead to functional impairments when restarting the water injection system, since the system pressure can be built up only delayed by the steam.
- the water injection system is delayed ready for operation. Due to this delayed operational readiness, temperature peaks in the exhaust gas as well as knocking events during combustion can occur during rapid load transients.
- a water injection device of an internal combustion engine comprises a water tank for storing water, at least one water injector for injecting the water into the internal combustion engine, a conveying element for conveying water from the water tank into the water injector.
- the water injection device further comprises a shut-off element, which is arranged between the water tank and the conveying element, and which is set up, a system pressure between the
- the water injection device has a
- shut-off can be closed when the area between shut-off and water injectors is filled with water.
- the closed shut-off element forms a closed region between the shut-off element and the water injectors.
- the system pressure in this area between shut-off and water injectors in inactive Phases of the water injection device can be kept above the vapor pressure of the water.
- the holding of the system pressure can be supported, for example, by an additional pressure accumulator and / or by elastic elements in water injection device, which work as a pressure accumulator.
- the shut-off element can also be advantageously opened when the vehicle is parked, so that the area between the shut-off element and the water injectors can be emptied of water by conveying the conveying element backwards, so that the water injectors and the lines are protected from damage by freezing and expanding water.
- the conveying element can advantageously be protected from flooding by water by closing the shut-off element after emptying the area between the shut-off element and water injectors.
- Water tank can be advantageously interrupted by closing the shut-off, so that the conveying element can not be flooded by water from the water tank.
- the pump can also be arranged below a height of the water level of the water in the water tank without the pump being flooded by water from the water tank.
- Vehicle integration allows. This is especially important in systems with a water tank and a conveyor element in the rear of the vehicle, since the space available in the vertical space is very limited.
- Shut-off is designed as a shut-off valve.
- the shut-off valve ensures that water is in the area between the shut-off valve and the water injector.
- the system pressure between the shut-off and the water injector at a level greater than 3 x 10 5 Pa, preferably greater than 5 x 10 5 Pa, more preferably greater than 5 x 10 5 Pa and less than 10 x 10 5 Pa to keep.
- vapor formation in the region between the shut-off element and the water injector can be avoided and, on the other hand, wall wetting of the water at the inlet channel can be avoided when water is injected into an inlet channel of an internal combustion engine.
- the components of the water injection system are cooled by inflowing water from the tank. At high temperatures and standing medium water in the
- shut-off is set to be brought into an open position with active water injection, in particular by energization.
- the shut-off valve is
- shut-off valve preferably designed as an electrically operated shut-off valve, which can be controlled by a control unit in a simple and accurate manner. With active water injection, the shut-off valve is energized and thus enables the
- shut-off valve When deactivating the water injection, the shut-off valve is also de-energized and keeps the system pressure thus at a pressure level sufficient for that
- Shut-off for example, be closed by a restoring force, for example by a spring element.
- a restoring force for example by a spring element.
- an accumulator is provided between the conveying element and the water injector. Such a pressure accumulator can keep the system pressure through the closed
- Water Injector comprises a return line, wherein the return line is arranged to return water from a region between the conveying element and the water injector in the water tank.
- the return line serves as a bypass for water, can flow through the water from the area between the conveyor element and the water injectors on the conveyor element and the shut-off valve back into the water tank.
- Water injector comprises a plurality of water injectors, which are connected to a manifold, wherein the manifold between the shut-off element and the water injectors is arranged.
- Conveying element in particular by energization, brought into the open position to become.
- shut-off water can be fed back into the water tank.
- an internal combustion engine comprising a water injection device according to the invention for the injection of water.
- the internal combustion engine is operated according to the Otto principle and with gasoline.
- the internal combustion engine which is operated according to the Otto principle, the internal combustion engine is to be understood, in which a combustion of gasoline or gasoline-air mixture takes place by means of spark ignition in the form of a spark plug. Since in such an internal combustion engine, the ignition by the spark ignition is precisely predetermined, which can be compared with respect to the inventive
- FIG. 1 is a highly simplified schematic view of an internal combustion engine with a water injection device according to a first embodiment of the present invention
- FIG. 2 is a simplified schematic view of the water injection device according to the first embodiment
- Fig. 3 is a simplified schematic view of the water injection device according to a second embodiment of the present invention.
- Water injection device 1 of an internal combustion engine 2 described in detail according to a first embodiment is operated according to the Otto principle and with gasoline direct injection.
- the internal combustion engine 2 comprises per cylinder a combustion chamber 20 in which a piston 21 is movable back and forth. Furthermore, the internal combustion engine 2 per cylinder has an inlet channel 22, via which air is supplied to the combustion chamber 20. Exhaust gas is removed via an exhaust duct 23. For this purpose, at the inlet channel 22 a
- Reference numeral 24 denotes a fuel injection valve.
- a water injector 6 is further arranged, which via a
- Control unit 10 injects water into the inlet channel 22 of the internal combustion engine 2.
- a water injector 6 per cylinder is provided.
- two water injectors per cylinder can be arranged for better treatment or to increase the maximum amount of water injectable per combustion cycle.
- the water injection device for example, as a pump
- a second line 8 connects the
- a shut-off element 1 1 is arranged, which divides the first line 7 into a first line section 7a and a second line section 7b and is controlled by the control unit 10.
- the shut-off element 1 1 is set up, a system pressure between the
- shut-off 1 1 and the water injector 6 to maintain a level at which a Evaporation of water located between the water tank 5 and the conveying element 3 is not evaporated.
- the shut-off 1 for example, a shut-off valve 1 1 a, for example, be an electrically operated shut-off valve 1 1 a.
- the shut-off valve 1 1 a is for example a 2/2 way valve.
- the shut-off element 1 1 is set up to maintain the system pressure in the region between the shut-off element 1 1 and the water injectors 6 at a level greater than 3 ⁇ 10 5 Pa, preferably greater than 5 ⁇ 10 5 Pa.
- the shut-off valve 1 1 a is arranged so that the system pressure in the area between the shut-off 1 1 and the water injectors 6 is kept smaller than 10 x 10 5 Pa.
- shut-off valve 11a is designed to be de-energized e.g. is closed by a closing force of a spring element 12.
- shut-off valve 1 1 a is normally closed and holds the
- the shut-off valve 1 1 a is energized and thus allows a promotion of the water from the water tank 5 to the water injectors 6 (second switching position of the shut-off valve 1 1 a).
- the check valve 1 1 a is also set to be opened by energization when changing the operating direction of the conveyor element 3, so for example a change in the direction of rotation of the pump, water is fed back into the water tank 5 (second switching position of the check valve 1 1 a ).
- the water injection device 1 comprises a plurality of water injectors 6.
- a distributor 9 for example a water rail, is provided in the water injection device 1, to which the plurality of water injectors 6 can be connected and which distributes the water to the water injectors 6.
- the check valve 1 1 a is in the first switching position, ie the closed position.
- a shut-off element 1 1 between the water tank 5 and the conveying element 3 By providing a shut-off element 1 1 between the water tank 5 and the conveying element 3, vapor formation in the water injection device 1 in the area between the shut-off element 1 1 and the conveying element 3 can be prevented.
- the water injection device 1 is operable at inactive operating points and can be brought into use quickly when the combustion of the
- Internal combustion engine 2 requests a water injection.
- a pressure accumulator 14 is intended to compensate for pressure fluctuations and can assist in closed shut-off valve 1 1 maintain the system pressure in the area between shut-off 1 1 and 6 water injectors.
- the pressure accumulator 14 may be arranged, for example, between the conveying element 3 and the water injector 6. But it can also elastic components in the water injection device 1, for example, elastic parts of the manifold 9 act as a pressure accumulator 14.
- the second embodiment of the water injection device 1 according to the invention of Figure 3 differs from the first embodiment in that in the second embodiment of the water injection device 1, a return line 15 is provided. Via the return line 15, water can flow back from a region between the conveying element 3 and the water injector 6 into the water tank 5.
- a check valve 16 is disposed in the return line 15. The check valve 16 allows water from the area between the
- Spring element 13 acts to be opened (open position of the check valve 16).
- the check valve 16 closes (closed position). In Figure 3, the check valve 16 is in the closed position.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017210487.2A DE102017210487A1 (en) | 2017-06-22 | 2017-06-22 | Water injection device of an internal combustion engine |
PCT/EP2018/064130 WO2018233992A1 (en) | 2017-06-22 | 2018-05-30 | Water injection device of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3642469A1 true EP3642469A1 (en) | 2020-04-29 |
Family
ID=62528422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18729077.0A Withdrawn EP3642469A1 (en) | 2017-06-22 | 2018-05-30 | Water injection device of an internal combustion engine |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3642469A1 (en) |
KR (1) | KR20200018474A (en) |
CN (1) | CN110785554A (en) |
BR (1) | BR112019027222A2 (en) |
DE (1) | DE102017210487A1 (en) |
WO (1) | WO2018233992A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018208001A1 (en) * | 2018-05-22 | 2019-11-28 | Robert Bosch Gmbh | Coolant conveyor for a cooling system of an internal combustion engine, in particular of a motor vehicle, cooling system and internal combustion engine |
DE102018221905A1 (en) * | 2018-12-17 | 2020-06-18 | Robert Bosch Gmbh | Water injection system and method for operating a water injection system |
DE102019203660A1 (en) * | 2019-03-19 | 2020-04-30 | Audi Ag | Method for operating a drive device, corresponding drive device and use of an aqueous urea solution for operating a drive device |
DE102019124791B3 (en) | 2019-09-16 | 2021-02-18 | Audi Ag | Motor vehicle with a water supply device and method for operating a motor vehicle |
DE102020117290A1 (en) | 2020-07-01 | 2021-07-22 | Audi Aktiengesellschaft | Internal combustion engine with a water introduction device and a method for operating an internal combustion engine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011016967A1 (en) * | 2011-04-13 | 2012-10-18 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for operating an SCR dosing unit |
DE102013206102A1 (en) * | 2013-04-08 | 2014-10-23 | Bayerische Motoren Werke Aktiengesellschaft | System and method for water injection for an internal combustion engine |
DE102014222463A1 (en) * | 2014-11-04 | 2016-05-04 | Bayerische Motoren Werke Aktiengesellschaft | Water injection device and method of operating such |
DE102015208502A1 (en) * | 2015-05-07 | 2016-11-10 | Robert Bosch Gmbh | Water injection device of an internal combustion engine |
DE102015208476A1 (en) | 2015-05-07 | 2016-11-10 | Robert Bosch Gmbh | Apparatus and method for injecting water for an internal combustion engine |
DE102015220326A1 (en) * | 2015-10-19 | 2017-04-20 | Robert Bosch Gmbh | Apparatus for providing water and method and apparatus for controlling an electric pump for providing water for injection into a combustion chamber of an engine |
DE102016203056A1 (en) * | 2016-02-26 | 2017-08-31 | Robert Bosch Gmbh | Pump arrangement of a water injection device |
-
2017
- 2017-06-22 DE DE102017210487.2A patent/DE102017210487A1/en not_active Withdrawn
-
2018
- 2018-05-30 KR KR1020197037738A patent/KR20200018474A/en not_active Application Discontinuation
- 2018-05-30 EP EP18729077.0A patent/EP3642469A1/en not_active Withdrawn
- 2018-05-30 BR BR112019027222-4A patent/BR112019027222A2/en not_active Application Discontinuation
- 2018-05-30 WO PCT/EP2018/064130 patent/WO2018233992A1/en unknown
- 2018-05-30 CN CN201880041890.7A patent/CN110785554A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN110785554A (en) | 2020-02-11 |
DE102017210487A1 (en) | 2018-12-27 |
WO2018233992A1 (en) | 2018-12-27 |
BR112019027222A2 (en) | 2020-07-07 |
KR20200018474A (en) | 2020-02-19 |
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