Classifications

• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K25/00—Details relating to contact between valve members and seats
  • F16K25/005—Particular materials for seats or closure elements
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
  • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
  • F16K27/029—Electromagnetically actuated valves
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0644—One-way valve
  • F16K31/0655—Lift valves
  • F16K31/0665—Lift valves with valve member being at least partially ball-shaped
• • 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

Definitions

• Solenoid valve Internal combustion engine with solenoid valve and method for
• the present invention relates to a solenoid valve with good
• the present invention also relates to an internal combustion engine with a corrosion-protected solenoid valve.
• Solenoid valves and in particular their valve needles, are mostly made of martensitic steel due to their very good mechanical properties and in particular high hardness.
• a disadvantage of martensitic steels is their high susceptibility to corrosion, which leads to corrosion especially in the case of water-containing media to be controlled and, after a short time, to the failure of the solenoid valve.
• the solenoid valve which is provided for controlling fluids, comprises a valve needle.
• the valve needle is in particular at least partially inside a valve housing
• valve needle thus comes in direct contact with the fluid to be controlled.
• the valve needle in this case comprises a needle head which releases and closes at least one outlet opening on a valve seat. Furthermore, the valve needle has an arranged in the axial direction of the valve needle needle shaft, at one of End of the needle head is arranged. In order to obtain a good corrosion stability, at least one surface of the valve needle is made of a
• Austenitic steels are characterized by a high corrosion resistance, even with permanent contact with
• a surface of the needle head is formed from an austenitic steel.
• the needle head performs the function of closing and releasing at least one outlet opening on the valve seat and is thus permanently in contact with the fluid to be controlled,
• the needle head is formed entirely of an austenitic steel.
• the needle head and the needle shaft is usually permanently in direct contact with the fluid to be controlled. Further advantageously, it is therefore provided that a surface of the needle shaft is formed from an austenitic steel.
• the needle shank is formed entirely of an austenitic steel.
• both at least one surface of the needle shaft and a surface of the needle head from a austenitic steel are formed.
• both the needle head and the needle shaft made of austenitic steel. This also facilitates the connection formation between the needle head and the needle shaft, which is then very easy to produce by a cohesive connection, in particular by a welded connection.
• Austenitic steels may have lower mechanical strength compared to conventional martensitic steels.
• the austenitic steel of the solenoid valve is preferably kolsterinstrument.
• the mechanical properties, and in particular the wear resistance of the solenoid valve, can also advantageously be improved by coating the austenitic steel with a DLC layer.
• DLC ie diamond-like-carbon
• a component that at least partially surrounds the valve needle, in particular a valve housing is formed from an austenitic steel.
• an internal combustion engine which comprises a solenoid valve as described above.
• the corrosion resistance of the internal combustion engine can be improved with durable stable and reliable mileage.
• the solenoid valve to be produced comprises a valve needle with a needle head and a needle shaft arranged on the needle head in the axial direction of the valve needle.
• the needle head has the function of releasing and closing at least one outlet opening on a valve seat.
• valve needle made of an austenitic steel.
• At least one surface of the needle head and / or a surface of the needle shaft are formed of austenitic steel, and the needle head and / or the needle shaft can be formed entirely of austenitic steel. This facilitates the manufacturing process, since only one
• the austenitic steel is preferably kolsterintestin.
• the wear resistance of the solenoid valve can be further increased by the method in particular a step of
• Figure 1 is a schematic sectional view of a solenoid valve according to an embodiment of the invention.
• the solenoid valve 1 comprises a valve needle 2.
• the valve needle 2 has a needle head 3 and a needle shaft 4 arranged on the needle head 3 in the axial direction XX of the valve needle 2.
• the needle shaft 4 and the needle head 3 are integrally connected to each other by means of a welded joint 14.
• the valve needle 2 is surrounded by a valve housing 6, wherein between the valve housing 6 and the valve needle 2, a fluid path 7 for guiding a fluid is present.
• a return element 1 1 is connected to the valve needle 2 to reset the valve needle 2 in the starting position.
• FIG. 1 shows the
• the solenoid valve 1 further comprises a magnet armature 10 and an inner pole 12. Further, a coil 13 is provided, which when energized the
• Magnetic armature 10 in the direction of the inner pole 12 attracts.
• a surface of the needle shaft 4 and a surface of the needle head 3 are formed of an austenitic steel.
• a very good corrosion resistance of the valve needle 2 is achieved.
• the welded joint 14 can be performed easily and stably.
• the needle head 3 and the needle shaft 4 are formed entirely of austenitic steel.
• the valve needle 2 further comprises a first armature stop 8 and a second armature stop 9.
• the magnet armature 10 is arranged between the first and second armature stop 8, 9.
• a guide region 16 for the magnet armature 10 is provided on the valve needle 2.
• valve needle 2 in particular also the valve housing 6, are made of austenitic steel.
• This version offers a particularly high, durable corrosion resistance, especially against hydrous fluids.
• the used austenitic steel is kolsterintestin.
• Abrasion resistance of the austenitic steel may be further enhanced by a DLC Coating be increased.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Magnetically Actuated Valves (AREA)
• Fuel-Injection Apparatus (AREA)
• Lift Valve (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61007676

Family Applications (1)

Country Status (4)

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Citations (8)

Family Cites Families (4)

• 2017
  • 2017-01-27 DE DE102017201300.1A patent/DE102017201300A1/de active Pending
• 2018
  • 2018-01-08 CN CN201880008698.8A patent/CN110226064A/zh active Pending
  • 2018-01-08 WO PCT/EP2018/050319 patent/WO2018137913A1/de active Application Filing
  • 2018-01-08 JP JP2019538123A patent/JP6989607B2/ja active Active

Patent Citations (8)

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