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
  • F02M25/025—Adding water
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/08—Cooling; Heating; Preventing freezing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
• • 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 delivery module for injecting water into or in front of the combustion chamber of an internal combustion engine with a delivery unit having a pump for delivering the water from a tank, the water being conveyable by means of the pump along a metering line to an injection point, the delivery unit having a water outlet has, through which water can be pumped out of the delivery unit.
• the invention relates to a device for injecting water into an internal combustion engine.
• water delivery modules have for this purpose at least one tank for storage of the water and furthermore suitable delivery means, such as a pump, for example, to direct the water along suitable lines to the combustion chamber or in front of the combustion chamber.
• suitable delivery means such as a pump, for example, to direct the water along suitable lines to the combustion chamber or in front of the combustion chamber.
• the expansion of water within a delivery line can be up to 10% of the initial volume due to the freeze, which is why delivery lines are regularly provided that can compensate for as large a proportion of this expansion as possible. Furthermore, attempts are made to keep the lines as free of water as possible when not in use in order to avoid freezing of the lines. Alternatively, compensation volumes are provided on the delivery lines, which are intended to compensate for the increase in volume.
• a disadvantage of the solutions in the prior art is, in particular, that the provision of lines that are as flexible as possible results in increased costs. Furthermore, other negative properties for the delivery module can result from highly flexible lines.
• the provision of compensation volumes is technically very complex and in particular worsens the adaptability for delivery modules to different vehicles. Emptying the delivery lines is time-consuming because, for example, the delivery pump has to be specially adapted to enable the delivery lines to be emptied. In addition, precautions must be taken to prevent the pump from drawing in air and running dry. Furthermore, it is particularly critical if the pump starts up with air on the conveying element of the pump, since this increases the closure and a significantly higher speed of the pump is still required to ensure that the water is conveyed.
• One embodiment of the invention relates to a water delivery module for injecting water into or in front of the combustion chamber of an internal combustion engine with a delivery unit having a pump for delivering the water from a tank, the water being conveyable by means of the pump along a metering line to an injection point, with the feed unit has a water outlet through which water can be pumped out of the feed unit, the water outlet being formed by a connector on which the metering line can be plugged, with water from the feed unit being feedable along the connector plug into the metering line, with the connector cker has a bleed section from the water, which is part of the Fluidlei device from the delivery unit to the metering line.
• the connector can be formed, for example, by a solid pipe section over which the metering line is inserted.
• the metering line can be attached to the connector by means of a fixing element, such as a locking clip.
• the pump delivers the water out of the delivery unit, with the connector plug located downstream of the pump outlet in the delivery direction.
• the water to be pumped is routed between the pump outlet and the connection plug, provided that the connection plug is not directly adjacent to the pump outlet, is formed by a line section, which is also referred to as an outlet channel.
• the connector has an interior space that can flow through, which is delimited by a wall and thus forms a section through which the water can flow.
• the connection plug is preferably designed as a rigid or only slightly elastic line section and protrudes from the assembly formed by the conveyor unit, the filter and the control electronics.
• the flow-through section has a line cross-section that can be changed along a flow-through direction.
• the flow-through section of the connector plug is usually flowed through in the direction from the delivery unit towards the metering line. This represents the conveying direction for the water. In particular when the pump is at a standstill, slight backflows can occur, with the connector plug then being flowed through in the opposite direction to the actual conveying direction.
• the water may freeze.
• the water can freeze, for example, in the area of the metering line, in the area of the connector or in the area of the delivery unit.
• the water regularly freezes first in the area of the connector, as this is usually not thermally insulated like the metering line and the delivery unit. In particular, the area of the connector plug is little built up and is therefore exposed to the low temperatures in the area.
• the freezing of the water leads to a significant increase in the volume of the water, which on the one hand displaces water within the pipe system and on the other hand, the formation of ice also occupies additional volume within the pipe system.
• the freezing it can happen that water is pressed out of the connector in the direction of the delivery unit. Small pieces of ice can also be pushed in this direction.
• the area defined as an outlet channel, which is formed between the pump outlet and the connector is particularly susceptible to damage as a result of the water or ice that is pressed into it by the freezing.
• the connector or the flow-through section has a variable line cross-section along a flow direction, that is, from one of its end regions to the other end region. This can be achieved, for example, by tapering the line cross-section. Alternatively, areas limited in their extent can have a reduced line cross section, for example by a shoulder or projection running around in the circumferential direction.
• a preferred exemplary embodiment is characterized in that the section through which the flow can flow has a line cross-section that repeatedly tapers and increases again in the direction of flow from the delivery unit to the metering line.
• Such a tapering and again widening line cross-section forms a type of filter element, which in particular stops solid bodies, such as pieces of ice, for example.
• the flow-through section has a sawtooth-like contour in a longitudinal section.
• a sawtooth-like contour which is formed by circumferentially circumferential and jagged-like sections in the radial direction, is particularly advantageous for keeping pieces of ice on, since they get caught on one of the jagged projections and are blocked there.
• the flow-through section has a contour which increases the flow resistance in the flow direction from the metering line to the delivery unit more than along the flow direction from the delivery unit to the metering line. This makes it difficult to reclaim water and / or ice in the direction of the delivery unit, whereas the delivery of water in the main delivery direction is simplified during operation.
• the flow-through section forms a filter element for the fluid which can flow through the section, which filter element is formed by jagged pockets on the wall delimiting the flow-through section to the outside.
• the jagged pockets hold up pieces of ice by creating physical resistance for them. Furthermore, the pressure loss created by the pockets will reduce the backflow of water and / or ice.
• the minimum line cross-section of the section that can flow is smaller than the line cross-section on the side of the conveyor unit and is smaller than the line cross-section of the metering line.
• FIG. 1 shows a perspective view of the assembly formed by the delivery unit, the filter and the control electronics, with the connector plug protruding forwards in particular being shown, and FIG
• Fig. 2 is a view of a longitudinal section of the connector, showing in particular the flowable portion of the connector.
• FIG. 1 shows an assembly 1 of the water delivery module with a delivery unit, a filter element, control electronics and electrical connections. Not shown is, for example, a tank in which the assembly shown can be used.
• the delivery unit is followed by the connector 2 in the main delivery direction.
• the connection plug 2 is formed as an injection-molded part from a plastic with the base assembly of the assembly 1 and protrudes therefrom.
• a metering line (not shown) can be plugged into the connector 2 and connected to the connector.
• the connector 2 has a smooth outer surface over which the metering line can be pushed.
• a section through which a flow can flow is made within the connector 2 formed, which can be flowed through by the pumped water from the delivery unit.
• FIG. 2 shows a longitudinal section through the connection plug 2.
• the arrow 3 in FIGS. 1 and 2 shows the direction of flow of the water along which a water flow can arise as a result of the freezing of the water in or on the connection plug. This is opposite to the normal conveying direction.
• FIG. 2 the design of the inner wall of the connector 2 can be seen.
• the line cross-section varies along the extension of the connector.
• the inner wall has a jagged contour, which creates a sawtooth-like structure.
• the line cross-section decreases through an inclined flank 4 before the line cross-section increases again along the flank 5 perpendicular to the outer wall. This course is repeated in the illustration of FIG. 2 for example four times.
• the minimum line cross section 6 is smaller than the line cross section of the outlet channel or the metering line, both of which are not shown in FIG.
• the inner contour of the connector represents a mechanical filter that can mechanically block solids in the water, such as ice in particular, through the vertical flanks 5 protruding steeply into the cross-section that can flow through.
• the filter can be lengthened or shortened as required.
• a decrease in the minimum line cross-section 6 from one sawtooth-like structure to the next is also advantageous, so the pressure loss generated by the connector or the internal structure of the connector can be additionally influenced, whereby the filter effect is further improved.
• FIGS. 1 and 2 The different features of the individual exemplary embodiments can also be combined with one another.
• the exemplary embodiments of FIGS. 1 and 2 in particular do not have a restrictive character and serve to illustrate the inventive concept.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Devices For Dispensing Beverages (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Measuring Volume Flow (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74758796

Family Applications (1)

Country Status (5)

Family Cites Families (14)

• 2020
  • 2020-03-02 DE DE102020202666.1A patent/DE102020202666B3/de active Active
• 2021
  • 2021-02-25 EP EP21708205.6A patent/EP4115074A1/de not_active Withdrawn
  • 2021-02-25 WO PCT/EP2021/054703 patent/WO2021175700A1/de unknown
  • 2021-02-25 US US17/801,734 patent/US11835017B2/en active Active
  • 2021-02-25 CN CN202180018354.7A patent/CN115210461A/zh active Pending

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