Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R39/00—Rotary current collectors, distributors or interrupters
  • H01R39/60—Devices for interrupted current collection, e.g. commutating device, distributor, interrupter
• • 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
  • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
  • F02P7/021—Mechanical distributors
  • F02P7/022—Details of the distributor rotor or electrode

Definitions

• the invention relates to a method for producing distributor caps for ignition current distributors in Otto engines.
• Such distributor caps have an electrode for transferring the ignition current supplied by the current source - usually by switching on a high-voltage ignition coil - and - depending on the number of spark plugs to be supplied with current - two or more fixed electrodes for taking over the ignition current emitted by the distributor rotor and the like ⁇ hand over to the spark plugs of the engine via power cables connected to the electrodes on the outside of the distributor cap.
• the distance between the outer end of the distributor rotor and the contact surface of the contact track of the electrode is as small as possible in the period of the passage to ensure the best possible transfer of the ignition current be that there is a complete sealing of the distributor cap in the area of the passage of the electrodes embedded in it in order to rule out voltage losses or even voltage failures due to leakage current and / or moisture penetrating from the outside.
• electrodes are used according to the prior art to which the electrode protruding inwards into the distributor caps widens at right angles or at an obtuse angle to a cylindrical cable connection in the area of the passage through the distributor cap, the power cable depending on the manufacturer being inserted into the sleeve-shaped cable connection or onto the pin-shaped one designed cable connection is pushed on.
• the electrodes they are inserted into the distributor cap in a first step in the manufacture of the distributor cap without first making contact with the sliding track on the electrode pin during the injection molding or transfer molding process, by removing the usual thermoset or thermoplastic material during injection molding or transfer molding. Plastic can be surrounded on the inside and outside of the distributor cap.
• the traces of the electrodes have to be turned out or milled out in a separate subsequent operation on processing machines * and at the same time the plastic adhering to the electrode pins has to be removed.
• the electrode for the power supply to the distributor must be freed from the plastic surrounding it on the inside in order to enable the spring-mounted carbon pins to be inserted.
• the object of the invention is to further develop the method for producing distributor caps in such a way that they can be produced in one operation with prefabricated electrodes which have the contact surfaces and sliding track contacts.
• the method according to the invention offers the following advantages over the known methods: by using electrodes that have a multi-stage widening at the transition from the electrode pin to the cable connections, be it obtuse-angled, right-angled, convex or concave or also in combination of such stages, a perfect seal is achieved reached in the area of the passage of the electrode through the distributor cap jacket and thus prevents leakage currents and / or the entry of moisture.
• the design of the electrodes according to the invention prevents the plastic from rising on the electrode pins during the injection molding or transfer molding process, as in the conventional manufacturing processes. For this reason, the electrodes can be given their final shape, in particular slideway contacts, before the distributor cap is manufactured.
• the electrodes are not surrounded by plastic after the injection or injection molding process due to the avoided rising of the plastic in the mechanical form, but rather pure metal and thus fully electrically conductive.
• FIG. 1 a representation of the distributor cap produced according to the invention in a diagonal longitudinal section with central electrode for current supply and two current discharge electrodes assigned to the distributor rotor;
• FIG. 3 shows a current delivery electrode according to FIG. 1 in longitudinal section A-A;
• F Fiigg .. 4 4 a current delivery electrode in longitudinal section as in Figure 1;
• Fig. 5 a current output electrode according to Figure 1 in the plan from below into the distributor cap;
• Fig. 6 the distributor cap as in Figure 1, but with
• Fig. 8 a current output electrode in longitudinal section as in Figure 6;
• Fig.10 a current output electrode according to Figure 1 in longitudinal section A-A, but with electrode pegs with right-angled cross-section;
• Fig.11 a current output electrode according to Figure 10 in the plan from below into the distributor cap.
• the jacket 2 of the distributor cap 1 is produced in a manner known per se from plastic, in particular from thermoplastic or thermoset, in the injection or transfer molding process, and the current output electrodes 3, 3 1 , 3 11 as well as in the transfer or transfer molding process the electrode 4, 4 'is cast or injected into the jacket 2 for current consumption.
• the electrodes 3, 3 ', 3''and 4, 4 * used for this purpose have the sleeve-shaped recesses according to FIGS. 1, 3, 4, 10 and 11 at their outlet from the distributor cap 1 or from their jacket 2 Connecting cables or the pin-shaped connecting pins 6 for plugging on the connecting cables according to FIGS. 6-8.
• the electrodes 3, 3 • used in the manufacturing method according to the invention also have the electrode pins 7 with the sliding track contacts 8 attached before the manufacturing of the distributor cap 1, against which the distributor rotor passes as it rotates.
• the electrode peg widens in the region of the passage of the electrode through the cap jacket 2 in a first section 9 in the shape of a truncated cone (seen in longitudinal section) another section 10 over, he fechlebahnbahnkontsts 8 continues the obtuse angle of section 9, but otherwise runs parallel to the longitudinal axis of the electrode. From section 10 the electrode widens concave / convex in section 11 to sleeve 5. In sections 10 and 11 the electrode has a round cross section.
• the electrode peg 7 merges into the section 9', which is designed like the section 9 described, but projects laterally more than this.
• Section 9 'adjoins section 10' which is piston-shaped and whose outside extends over the entire circumference parallel to the longitudinal axis of the electrode.
• This section 10 ' jumps at the outlet of the electrode 3 1 from the jacket 2 of the Distributor cap 1 in its entire radius and passes into the connecting pin 6.
• the electrodes used for the described method can also have, as shown in FIGS. 10 and 11, in a further modification 3 '* an electrode stud 7' which is rectangular or square in cross section and which also has a section 9 which is also rectangular or square in cross section 11 passes.
• the portion 9 '* joins the portion 10 *' to, in turn, 'extended to the sleeve 5, the portion 11' is concave / convex portion 11 ⁇ 'and the sleeve 5, in turn, have a nik ⁇ shaped cross section.
• Sleeve 5 are surrounded by the plastic material of the jacket 2 of the distributor cap 1.
• electrodes can also be used in which the step-like widening from the electrode pins 7 is held at different angles, radii or combinations than those shown in FIGS. 1-11.
• the use of electrodes with an initially rectangular and then obtuse-angled widening or also with only convex / concave widened section falls under the invention.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=6267932

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Citations (8)

Family Cites Families (2)

• 1985
  • 1985-04-13 DE DE19853513283 patent/DE3513283A1/de active Granted
• 1986
  • 1986-04-11 JP JP61502215A patent/JPS62502905A/ja active Pending
  • 1986-04-11 EP EP86105020A patent/EP0198449A1/de not_active Withdrawn
  • 1986-04-11 WO PCT/DE1986/000160 patent/WO1986006219A1/de not_active Ceased

Patent Citations (8)

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