Classifications

• • 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
  • H01T13/05—Means providing electrical connection to sparking plugs combined with interference suppressing or shielding means

Definitions

• the invention relates to a ground connection for the spark plugs of a multi-cylinder internal combustion engine for a vehicle, the metallic plug housing of each spark plug having a ground electrode and being screwed into a cylinder head of the engine, and the engine having a vehicle ground and the vehicle ground having a pole the battery of the vehicle is electrically connected.
• Spark plugs are components of an ignition system for an internal combustion engine of a vehicle.
• Each spark plug consists of a metal center electrode which is embedded in a ceramic insulator. The lower part of the insulator is held by a metallic plug housing, which has a connection thread for screwing the candle into a cylinder head of the engine.
• a second electrode, the ground electrode is welded onto the candle base. The ground electrode is connected to the vehicle ground via the cylinder head of the engine.
• the ground electrode has a fixed air gap to the center electrode, the electrode gap. High voltage ignition current coming from the distributor flows through the central electrode and bridges the electrode gap as a spark.
• the spark must be strong enough to ignite the fuel mixture. This requires a relatively large electrode gap. However, the greater the distance between the electrodes, the greater the voltage required to generate the ignition spark.
• the invention has for its object to provide a ground connection, with the aid of which the ignition is improved.
• the invention is based on the knowledge that it is not only a question of increasing the voltage. Rather, the invention is characterized in that in order to improve the ignition, an additional ground cable is provided for each spark plug, which is connected to the plug housing of the associated spark plug, and in that the additional ground cables are connected to a common ground cable connected with the negative pole of the battery is connected.
• a significantly more powerful spark is generated.
• the engine starts better than an engine without an additional earth cable. His cold run is better; the engine doesn't buck.
• the engine reaches its operating temperature faster, but does not become too hot. Warming up the engine is calm and powerful.
• the sprint of the vehicle is better, regardless of whether the engine is still cold or already warm.
• the performance of the engine on the mountain is very good.
• the fuel consumption is lower. - In the case of a certain vehicle, consumption on short journeys dropped from 14 1/100 km to 11 1/100 km; when driving on the motorway at a speed of 130 km / h, consumption fell from 9 1 / km to 7.5 1 / km -.
• the stronger ignition spark leads to fewer misfires.
• Figure 1 is a schematic circuit diagram
• Figure 2 shows a spark plug partially in axial section, partially in view.
• the electrical circuit of a motor vehicle is fed from a battery 1.
• the positive pole 12 of this battery 1 is connected to an ignition distributor via an ignition lock and an ignition coil (not shown).
• One of - in the exemplary embodiment - four spark plugs 31 to 34 of the ignition current is supplied via the ignition distributor with the aid of lines 21 to 24.
• the extended line 21 supplies the spark plug 31 with the ignition current.
• the lines 22 to 24, which lead to the spark plugs 32 to 34, are de-energized. They carry the ignition current cyclically when the distributor is turned.
• the negative pole 13 of the battery 1 is connected to the vehicle earth 5, usually to the vehicle body. All other electrical devices of the motor vehicle are also connected to the vehicle ground 5. In the case of the ground connection according to the invention, a ground cable 4 also extends from the negative pole 13 of the battery 1. Secondary cables 41 to 44 are connected to this additional ground cable 4, each of which is connected to one of the spark plugs 31 to 34.
• Each spark plug 31 to 34 consists of a central electrode 61 which is embedded in a ceramic insulator 62.
• the lower part of the ceramic insulator 62 is received by a metallic candle housing 63.
• the metallic plug housing 63 has a connection thread 64 for screwing the spark plug into a cylinder head 71 of an engine 7.
• a second electrode, the ground electrode 66, is welded to the plug base 65. It is connected to the vehicle mass 5 via the cylinder head 71.
• the negative pole 13 of the battery 1 is attached to the earth cable 4 via its auxiliary cable 41.
• a hole is drilled in the candle housing 63 in the axial direction, into which the free end of the secondary cable 41 is inserted and welded.
• Other types of attachment of the earth cable 4 to the spark plugs 31 to 34 are possible.
• a ring can be attached to the ground cable 4, 41, which is placed around the candle housing 63.
• a clamping shoe can also be attached, which with the plug housing 63 is screwed.
• Other types of attachment of the earth cable, more precisely the ends of the auxiliary cables 41 to 44 with the spark plugs 31 to 34, are possible.
• the invention is commercially usable for all spark plugs that are components of a multi-cylinder internal combustion engine for a vehicle.

Landscapes

• Spark Plugs (AREA)
• Ignition Installations For Internal Combustion Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6371688

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (8)

Family Cites Families (2)

• 1989
  • 1989-01-07 DE DE3900321A patent/DE3900321C1/de not_active Expired - Lifetime
  • 1989-11-10 DE DE89912223T patent/DE58905559D1/de not_active Expired - Fee Related
  • 1989-11-10 WO PCT/DE1989/000706 patent/WO1990007811A1/de not_active Ceased
  • 1989-11-10 JP JP1511346A patent/JPH03503336A/ja active Pending
  • 1989-11-10 EP EP89912223A patent/EP0406350B1/de not_active Expired - Lifetime

Patent Citations (8)

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