Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
  • F02P3/00—Other installations
  • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
  • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
• • 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
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F1/00—Springs
  • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
  • F16F1/04—Wound springs
  • F16F1/046—Wound springs with partial nesting of inner and outer coils
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
  • H01T13/00—Sparking plugs
  • H01T13/02—Details
  • H01T13/04—Means providing electrical connection to sparking plugs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
  • F02D2400/22—Connectors or cables specially adapted for engine management applications
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
  • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices

Definitions

• Ignition device with a spring for the electrical connection of a spark plug
• the invention relates to an ignition device for an internal combustion engine, with a spark plug, an ignition coil with a voltage connection and a spring for electrically connecting the spark plug with the
• the invention relates to a
• a spring for transmitting the ignition voltage at a spring end can be made conical
• Such a tapered spring is known, for example, from DE 10 2009 035 897 A1 This document describes a
• Ignition assembly with an ignition coil, a spark plug and a spring for electrically connecting the ignition coil to the spark plug.
• the described spring has a contact with the spark plug contact portion having a comparison to the rest of the outer circumference to the spark plug tapered outer circumference.
• the tapered portion of the spring is received by an equally tapered recess.
• An object of the invention is an ignition assembly
• an ignition device for an internal combustion engine comprising a spark plug; an ignition coil with a voltage connection; and a spring for
• a continuous spring wire in the form of external windings extends from an ignition coil side end of the spring to a spark plug end of the spring and the spring wire at the spark plug end, in particular at least in the unloaded state of the spring, in particular in the unloaded and loaded state of the spring, in the form of
• Inner turns continue within the outer turns in a direction towards the ignition coil side end.
• the problematic pointed contours of the spring wire end are positioned inside the spring.
• the high electric field density and thus the high electrical energy density is enveloped by the potential of the external windings.
• the spring geometry itself generates a sufficiently homogeneous electric field distribution.
• spark plug end can thus be even better prevented.
• the Ignition device is formed so that the inner turns taper conically along a longitudinal axis of the spring in a direction away from the spark plug end.
• a recess is simultaneously created by the inner turns, which serves as a socket for receiving an electrical contact point of the spark plug.
• the predominant length, ie more than 50% of the length, of the spring has a substantially cylindrical outer contour. The length is the dimension along the longitudinal axis of the spring from an ignition coil side end to a spark plug end of the spring.
• a mean distance between adjacent outer turns is greater than an average distance between adjacent inner turns.
• the invention provides an internal combustion engine with such an ignition device and a motor vehicle with such a
• Figure 1 shows schematically an ignition device according to a
• FIG. 1 shows the spring of the ignition device according to the
• FIG. 1 shows a highly schematic representation of an ignition device 1 according to an embodiment of the invention.
• An essential aspect of this invention is the design of a spring 2, which produces an electrical contact between an ignition coil 3 and a spark plug 4.
• the spark plug 4 is known to the ignition of a combustible
• the structure of the spring 2 will be explained in more detail with reference to Fig. 2, in particular, the spring 2 is shown in Fig. 2 in the unloaded state.
• the spring 2 is constructed of a continuous spring wire, which consists of an electrically conductive material. From an ignition coil end 7, the spring wire in the form of external windings 9 extends helically about a longitudinal axis to a spark plug end 8.
• the outer windings 9 over at least 50% of the length of the ignition coil side end 7 to the spark plug end 8 has a substantially cylindrical outer contour and more preferably, this is over 80% of that length, and more preferably over 90% of that length.
• the remaining portion (the length of the ignition coil end 7 to the spark plug end 8) can be, for example, for
• tapered spark plug end 8 i.e., a diameter of the tapered spark plug end 8
• Section, the outer turns 9 be cone-shaped.
• the spring 2 is also a compression spring in which, in the unloaded case, the vast majority, ie more than 50%, more preferably more than 80%, of external turns 9 are spaced from at least one of the adjacent outer turns 9. At the spark plug end are arranged a single, two or three turns without spacing.
• the continuous spring wire continues in the form of inner windings 10 within the outer windings 9 in a direction toward the ignition coil side end 7.
• the spring wire continues at the spark plug end 8 in the form of the inner windings 10 spirally around the longitudinal axis around.
• a pitch angle ⁇ of the outer turns 9 is opposite to a pitch angle ⁇ of the inner turns 10, but not necessarily the same size.
• the pitch angle ⁇ of the outer or inner windings is the angle that encloses the osculation plane of the windings with a plane perpendicular to the longitudinal axis, as shown in Fig. 2.
• the diameter of the inner turns 10 tapers, starting from the spark plug end 8 toward the ignition coil end 7.
• the inner coils 10 are not spaced apart, that is, adjacent to each other.
• the inner coils 10 completely fit with respect to their diameters into the outer coils.
• the inner convolutions 10 preferably extend over a length (along the longitudinal axis) of not more than 50%, more preferably not more than 30%, of the length (along the longitudinal axis) of the outer convolutions 9.
• a mean distance between the outer convolutions 9, ie the sum of the distances between adjacent outer turns 9 divided by the number of distances is greater than an average distance between the inner turns 10, ie the sum of the distances between adjacent inner turns 10 divided by the number of distances.
• the distances are measured in any angular position (the same for the inner and outer turns) and in each case between adjacent points of the spring wire in this angular position.
• the spark plug side end 8 of the spring 2 abuts the electrical contact point 6 and is in electrically conductive contact therewith.
• the ignition coil end 7 of the spring 2 is applied to the voltage terminal 5 and is in electrically conductive contact with this.
• the inner coils 10 form a recess which serves as a socket for the electrical contact point 6.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Ignition Installations For Internal Combustion Engines (AREA)
• Spark Plugs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=59858742

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Family Cites Families (24)

• 2016
  • 2016-10-05 DE DE102016219281.7A patent/DE102016219281B4/de active Active
• 2017
  • 2017-09-14 WO PCT/EP2017/073115 patent/WO2018065184A1/de unknown
  • 2017-09-14 JP JP2019518271A patent/JP6905589B2/ja active Active
  • 2017-09-14 EP EP17765451.4A patent/EP3523534A1/de not_active Withdrawn
  • 2017-09-14 CN CN201780060433.8A patent/CN109790812B/zh active Active
• 2019
  • 2019-04-02 US US16/372,486 patent/US10907605B2/en active Active

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