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
  • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R31/00—Coupling parts supported only by co-operation with counterpart
  • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
• • 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
  • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
  • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

Definitions

• the invention is based on a contact strip according to the main claim.
• a device is already known from DE-OS 37 30 571, in which the fuel injection valves are accommodated in individual receiving openings of a fuel distributor piece and are electrically contacted together by means of a contact strip.
• a number of plugs corresponding to the number of fuel injection valves, in which first electrically conductive contact elements that can be connected to second electrically conductive contact elements of the fuel injection valves are fastened, are jointly arranged on the contact strip.
• the electrical conductors that connect the electrical connector of the contacting strip to the first electrically conductive contact elements are arranged in the contact strip.
• the one-piece design of the contact strip has the disadvantage that the assembly of the flexible assembly consisting of the first electrically conductive contact elements and the electrical conductors on the contact strip, for example by pouring into the contact strip made of plastic, is very complex and is difficult. A large number of electrical conductors is also required if the The assembly of the flexible assembly in the one-piece contacting strip is particularly complex and complicated by means of the electrically contactable aggregates which are contacted by means of the common contacting strip and which are not to be excited at the same time, but rather at different times.
• a safe and reliable connection of the first electrically conductive contact elements and the electrical conductors to the contact strip is not always guaranteed. There is also the risk of damage to the first electrically conductive contact elements, the electrical conductors and the connections between the electrical conductors and the electrically conductive contact elements.
• the contact strip according to the invention with the characterizing features of the main claim has the advantage of a simple and inexpensive manufacture.
• the formation of the two-part contacting strip by means of a carrier part and a cover part enables the electrical conductors to be arranged on the carrier part without problems. This not only significantly reduces the assembly effort, but also increases the accessibility to the electrical conductors, the first electrically conductive contact elements and the plugs. The risk of damage to the first electrically conductive contact elements, the electrical conductors and the connections between the electrical conductors and the first electrically conductive contact elements is significantly reduced by the simplified handling and assembly.
• the measures listed in the subclaims enable advantageous further developments and improvements of the contacting strip specified in the main claim. It is advantageous if the plugs are connected to the carrier part such that they can move in a horizontal and vertical direction so that the shape and position tolerances between the electrically contacted units that can be contacted and the contact strip are compensated for.
• the carrier part along a longitudinal axis of the carrier has a number of fastening elements corresponding to the number of plugs with which the plugs move in the direction of one Dome - are connected along the longitudinal axis and vertically movable to float.
• each fastening dome has at least one transverse groove which runs in the direction of the dome's longitudinal axis and which is open towards a dome end face provided at the free dome end and the dome circumference and which elastically compresses the free dome end when the plug is pushed onto the fastening dome radial direction allowed, so that a provided on the connector or on the mounting dome latch can engage in a provided on the mounting dome or connector locking groove such that the connector relative to the mounting dome in the direction of the dome longitudinal axis and perpendicular to it can be moved.
• the latching groove and the latching lug are designed in a ring shape.
• the plugs are rigidly connected to the carrier part. It is particularly advantageous if the electrical conductors are arranged on an end face of the carrier part facing a bottom of the cover part, so that there is a simple arrangement of the electrical conductors on the carrier part and a problem-free electrical connection of the electrical conductors to the first electrically conductive contact elements results.
• the electrical conductors are pressed into guide grooves formed in the carrier part, if the electrical conductors are cast into the carrier part, or if the electrical conductors are held on the carrier part by means of holding elements . In this way, the electrical conductors can be securely and reliably attached to the carrier part in a simple manner.
• the carrier part, the plugs having the first electrically conductive contact elements arranged thereon and the electrical conductors arranged on the carrier part form a preassembled rigid assembly which is at least partially covered by the cover part.
• the preassembled rigid assembly not only allows greater flexibility in manufacture, it also reduces the risk of damage to the first electrically conductive contact elements, the electrical conductors and the connections between the first electrically conductive contact elements and the electrical conductors.
• the at least partial coverage of the preassembled rigid assembly by the cover part serves to protect the assembly during operation; the cover part itself can be made very simple.
• the cover part covers a carrier end face of the carrier part, in the vicinity of which the electrical conductors run. In this way, the electrical conductors, the first electrically conductive contact elements and the connections between Protect conductors and contact elements during operation from external influences.
• cover part is U-shaped and covers the support part on three sides, so that not only the first electrically conductive contact elements and the electrical conductors, but also the support part with the plugs as a whole and possibly part of the electrically excitable ones Aggregates with their second electrically conductive contact elements is protected from external influences.
• cover part and the carrier part are connected to one another by an elastic latching connection, which can be produced particularly quickly and easily during assembly.
• cover part and the support part are connected to one another by means of ultrasonic welding.
• cover part is designed as a plastic sheathing of the carrier part, so that there is a particularly compact contact strip which can be produced in a simple manner.
• the carrier part is tightly connected to the cover part.
• FIG. 1 shows a partial view of a first exemplary embodiment.
• 2 shows a section along the line II-II in FIG. 1
• FIG. 3 shows a second exemplary embodiment
• FIG. 4 shows a third exemplary embodiment
• FIG. 5 shows a fourth exemplary embodiment
• FIG. 6 shows a fifth exemplary embodiment.
• the plastic strip for example shown in FIGS. 1 to 6, for the common electrical contacting of several electrically excitable units of internal combustion engines, in particular fuel injection valves, the plastic strip is denoted by 1.
• the contact strip 1 is formed from a carrier part 2 and a cover part 3.
• plugs 8 are arranged on the carrier part 2, each of which is assigned to an electrically excitable unit and is used to make electrical contact with it.
• the plug 8 made of electrically insulating material has, for example, two stepped plug openings 9 which are open on both sides and in which a first electrically conductive contact element 11 is inserted by means of two latches 10 formed on the first electrically conductive contact element 11 ⁇ is increased.
• the first electrically conductive contact elements 11 are electrically conductively connected to electrical conductors 12 arranged on the carrier part 2, for example by means of a clamp and / or solder connection.
• a contact plug 14 is also arranged on the contacting strip 1, to which the electrical conductors 12 are connected and by means of which a control device (not shown) of a known type can be used to input electrical control signals for the electrically excitable units .
• all electrical conductors 12 extend from the connector 14 to the individual plugs 8 within the contact strip 1 and branch off there to the individual first electrically conductive contact elements 11.
• the individual plugs 8 are connected to the carrier part 2 so that they can move in a horizontal and vertical direction.
• shape and position tolerances can be compensated for between the electrically excited units that are contacted together and the contact strip 1, since the connectors 8 that are still movable after mounting on the carrier part 2 can be moved according to the position of two electrically conductive contact elements of the electrically excited ones Align aggregates on the carrier part 2.
• the risk of deformation and damage to the first electrically conductive contact elements 11, the second electrically conductive contact elements, the electrically excitable units and / or the plug 8 is thus substantially reduced.
• the carrier part 2 has, for example along a longitudinal axis 15 of the carrier, a number of fastening domes 17 corresponding to the number of connectors 8.
• Each of the fastening domes 17 has, in the direction of a dome longitudinal axis 18, for example four transverse grooves 22 which open towards a dome end face 20 provided at the free end 19 and the dome circumference 21 and which overlap in the region of the dome longitudinal axis 18.
• the transverse grooves 22 allow an elastic compression of the free dome end 19 when the plug 8 is pushed onto the fastening dome 17, so that an annular locking lug 25 provided for example on the plug 8 can engage in an annular locking groove 26 provided for example on the fastening dome 17 such that the plug 8 is still movable with play relative to the fixing dome 17 in the direction of the dome longitudinal axis 18 and perpendicular to it.
• an axial distance 27 is provided between a groove side surface 23 of the locking groove 26 facing the dome end face 20 and a nose shoulder 24 of the locking lug 25 of the plug 8 facing a cover base 28 of the cover part 3, so that the plug 8 is opposite the fastening dome 17 and so that it can be moved with play relative to the carrier part 2 in the axial or vertical direction.
• a carrier end face 29 faces the cover base 28.
• the radial distance 27 is limited by the contact of a plug end face 31 of the plug 8 facing the cover base 28 on a support shoulder 34 of the support part 2 facing away from the support end surface 29.
• plugs 8 it is also possible to connect the plugs 8 to the carrier part 2 so that they can move in a horizontal and vertical manner in a different manner.
• a radial clearance 49 is provided in the radial direction between the groove base 47 of the locking groove 26 and a clear width 48 of the locking lug 25. Furthermore, a radial play 50 is provided between a clear width 51 of a connector shoulder 52 and the dome circumference 21. As a result, the plug 8 can be moved freely in the radial or horizontal direction with respect to the fastening dome 17 and thus also with respect to the carrier part 2.
• the electrical conductors 12 are pressed into guide grooves 30 formed in the carrier end face 29 of the carrier part 2, insofar as they do not directly serve for the electrical contacting of the first electrically conductive contact elements 11.
• the carrier part 2, the plugs 8 arranged thereon and having the first electrically conductive contact elements 11 and the electrical conductors 12 arranged on the carrier part 2 form a preassembled rigid assembly which enables greater flexibility in production.
• the risk of damage to the first electrically conductive contact elements 11, the electrical conductors 12 and the connections between the first electrically conductive contact elements 11 and the electrical conductors 12 is reduced.
• the cover part 3 is U-shaped in the first embodiment and covers the support part 2 on three sides.
• At least one elastic locking lug 35 is formed on the mutually facing inner side surfaces 33 of the side walls 32, which detent is fast and easy with the support shoulder 34 of the support part 2 manufacturable locking connection is received.
• the elastic locking lugs 35 are formed on the carrier flanks 40 of the carrier part 2 facing the inner side surfaces 33 and locking grooves in the inner side surfaces 33 of the cover part 3.
• fastening bushings 37 are formed in the carrier part 2 during manufacture, for example made of a metallic material and have a longitudinal bore 36 and which are at least on one of the cover bottoms 28 facing away from the bottom surface 38 of the carrier part 2 are open.
• the fastening bushes 37 can be provided with an internal thread.
• at least two guide arms 39 protruding axially from the bottom surface 38 are also formed on the bottom surface 38 of the support part 2, preferably during the manufacture of the support part 2.
• the guide arms 39 serve to simplify the precise assembly of the contact strip 1, the fuel distributor piece, the intake manifold and the cylinder head of the internal combustion engine having receptacles for the guide arms 39.
• four positioning lugs 42 having a polygonal cross-sectional shape are formed on a plug end face 41 of the plug 8 facing away from the cover bottom 28 of the cover part 3, which are arranged at a distance from one another such that two each on one side the longitudinal axis 15 of the carrier lie symmetrically to the line II-II, which runs through the first electrically conductive contact elements 11.
• the positioning lugs 42 have, for example, the shape of a right angle and have parallel surfaces 43 in the longitudinal direction of the contact strip 1 and parallel surfaces 44 perpendicular to this.
• a connecting web 45 is formed which connects the two positioning lugs 42 lying on one side of the longitudinal axis 15 of the carrier at its end facing away from the longitudinal axis 15 of the carrier, so that their two surfaces 44 are shorter than those on the other side of the longitudinal axis of the carrier 15 running surfaces 44, which openly end at the end of the plug 8, that is to say with respect to the longitudinal axis 15 of the contact strip 1, the surfaces 44 and thus the positioning lugs 42 on different sides of the longitudinal axis 15 are designed asymmetrically to one another.
• the design of the plug 8 which is due to the connecting web 45 and is asymmetrical with respect to the longitudinal axis 15 of the carrier, and the corresponding design of an upper housing part of the electrically excitable unit, characterized by cutouts into which the positioning lugs 42 can engage, provides effective reverse polarity protection the electrically excitable unit, so that it cannot be rotated by 180 ° and connected to the plug 8 or the contact strip 1.
• FIG. 3 shows a second exemplary embodiment according to the invention, in which the same and equivalent parts are identified by essentially the same reference numerals as in FIGS. 1 and 2.
• the electrical conductors 12, which form the connector 14 not shown in FIG. 3 the contact Ste 1 connect to the first electrically conductive contact elements 11 of the connector 8 are attached to the carrier end face 29 of the carrier part 2 by means of holding elements 60 connected to the carrier part 2. There is thus the possibility that the number of electrical conductors 12 can be flexibly reacted to during manufacture.
• FIG. 4 shows a third exemplary embodiment according to the invention with electrical conductors 12 cast in the vicinity of the carrier end face 29 in the carrier part 2.
• This embodiment enables the electrical conductors 12 to be arranged on the carrier part 2 in a particularly safe and reliable manner essentially identified by the same reference numerals as in FIGS. 1 to 3.
• the plugs 8 are rigidly connected to the carrier part 2, so that there is a very simple configuration of the carrier part 2 according to the invention, for example as a common plastic injection molded part.
• Four positioning lugs 42 are formed on the plug end face 41 of the plug 8 integrated into the carrier part 2 and serve to position the contact strip 1 and the electrically excitable units relative to one another.
• the U-shaped cover part 3 which covers the support part 2 on three sides, has on its inner side surfaces in the second exemplary embodiment shown in FIG. 3 and the third in FIG 33 no latches 35.
• the pre-assembled rigid assembly consisting of the carrier part 2, the plugs 8 having the first electrically conductive contact elements 11 and the electrical conductors 12 is instead connected to the cover part 3 by means of ultrasonic welding.
• the pre-assembled rigid assembly it is also possible for the pre-assembled rigid assembly to be designed as a cover part 3 Plastic sheathing is partially surrounded, so that there is a particularly compact and easy to manufacture contact strip.
• FIGS. 5 and 6 each show a further exemplary embodiment of the invention, in which the same and equivalent parts are identified by essentially the same reference numerals as in pigments 1 to 4.
• the existing preassembled assembly is covered by the cover part 3 only in the area of the end face 29 of the support part 2.
• a holding shoulder 66 is formed at their ends facing the carrier end surface 29, which has a holding side surface 67 configured parallel to a longitudinal axis 16 of the plug or a longitudinal axis 18 of the dome.
• the distance between the two holding side surfaces 67 is smaller than the distance between the two outer side surfaces 65 of the carrier part 2.
• the cover part 3 encompasses the holding side surfaces 67 of the carrier part 2 with a cover edge 69 formed on its cover side parts 68.
• the cover part 3 rests with a contact surface 72 of a cover shoulder 73 formed on the cover edges 69 of the cover end face 29 of the support part 2.
• Cover part 3 and carrier part 2 are tightly connected to one another, for example, by means of ultrasonic welding.
• each longitudinal webs 70 are formed on the lid base 28 of the lid part 3, two of which each surround a first electrically conductive contact element 11, so that this and the electrical conductor 12 are largely protected from external influences. It is possible to attach the longitudinal webs 70 to the carrier End faces 71 facing part 2 lie against the carrier end face 29.
• the electrical conductors 12, provided they do not directly contact the first electrically conductive contact elements 11, are cast, for example, in the vicinity of the carrier end face 29 in the carrier part 2 and are thus particularly securely and reliably fixed in their position.
• the plugs 8 are rigidly connected to the carrier part 2, so that the carrier part 2 and the plugs 8 can be manufactured particularly easily and inexpensively, for example as a common plastic injection molded part. In the fourth exemplary embodiment, the formation of positioning lugs 42 and connecting web 45 on the plug end face 41 was brought up.
• the plugs 8 with the carrier part 2 are as in FIGS.
• the carrier part 2 has a number of fastening domes 17 corresponding to the number of plugs 8, onto which the plugs 8 are pushed and fastened in such a way that the plugs 8 are opposite the respective fastening dome 17 in the direction of the dome longitudinal axis 18 and are movable perpendicular to it.
• the preassembled assembly consisting of the carrier part 2, the plugs 8 having the first electrically conductive contact elements 11 and the electrical conductors 12 is provided by the cover part
• cover part 3 covers only in the area of the carrier end face 29 of the carrier part 2.
• the cover part 3 with a cover edge 69 formed on the cover side parts 68, engages around the holding side surfaces 67 of the support part 2.
• the cover part 3 lies with the contact surfaces 72 of the cover shoulder 73 formed on the cover edges 69 on the support end face 29 of the carrier part 2.
• Cover part 3 and carrier part 2 are, for example, tightly connected to one another by means of ultrasonic welding.
• the - Electrical conductors 12 are, for example, cast into the carrier part 2 in the vicinity of the carrier end face 29 and thus reliably fixed in their position. However, it is also possible for the electrical conductors 12 to be clipped into holding grooves in the carrier part 2 or to be held on the end face 29 of the carrier part 2 by means of holding elements.
• the two-part design of the contacting strip 1 according to the invention by the carrier part 2 and the cover part 3 permits simple and inexpensive production.
• the electrical conductors 12 can be seen to be attached to the support part 2 more reliably and reliably, but with little assembly work, so that there is a risk of damage to the first electrically conductive contact elements 11, the electrical conductors 12 and the connections between the electrical ones Conductors 12 and the first electrically conductive contact elements 11 is significantly reduced.
• the fuel injection valves can be arranged, for example, in a fuel distributor piece, in an intake manifold or directly in a cylinder head if connecting pieces and lines are provided for a fuel supply.
• the fuel can be sprayed off both into the intake manifold and directly into the cylinders of the internal combustion engine.
• the contact strip 1 according to the invention is, of course, also suitable for the electrical contacting of the spark plugs of an externally ignited internal combustion engine or the glow plugs of a self-igniting internal combustion engine.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Connector Housings Or Holding Contact Members (AREA)
• Fuel-Injection Apparatus (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6405261

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (15)

Family Cites Families (4)

• 1990
  • 1990-04-27 DE DE4013537A patent/DE4013537A1/de not_active Withdrawn
• 1991
  • 1991-03-22 US US07/776,342 patent/US5238415A/en not_active Expired - Fee Related
  • 1991-03-22 BR BR919105725A patent/BR9105725A/pt not_active Application Discontinuation
  • 1991-03-22 JP JP3505668A patent/JPH04507126A/ja active Pending
  • 1991-03-22 KR KR1019910701955A patent/KR920702752A/ko not_active Application Discontinuation
  • 1991-03-22 EP EP91905805A patent/EP0479959A1/de not_active Ceased
  • 1991-03-22 WO PCT/DE1991/000257 patent/WO1991017357A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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