EP2412069A2 - System for installation of an electrical cable - Google Patents

System for installation of an electrical cable

Info

Publication number
EP2412069A2
EP2412069A2 EP10707003A EP10707003A EP2412069A2 EP 2412069 A2 EP2412069 A2 EP 2412069A2 EP 10707003 A EP10707003 A EP 10707003A EP 10707003 A EP10707003 A EP 10707003A EP 2412069 A2 EP2412069 A2 EP 2412069A2
Authority
EP
European Patent Office
Prior art keywords
cable
annular member
annular
cylindrical member
electrical cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10707003A
Other languages
German (de)
French (fr)
Inventor
Marek Mleczko
Tomasz Tecza
Slawomir Wrzosek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP2412069A2 publication Critical patent/EP2412069A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G11/00—Arrangements of electric cables or lines between relatively-movable parts
    • 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
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors

Definitions

  • the present invention relates to a system for the installation of an electrical cable.
  • a fuel injector comprises a cylindrical member having a longitudinal axis.
  • An electrical control circuit is mounted on or adjacent one end of the cylindrical member.
  • a sensor is mounted on a separate member located at the other end of the cylindrical member.
  • An electrical cable extends between the control circuit and the sensor along the outer surface of the cylindrical member. The preferred arrangement is for the cable to extend in a direction which is substantially parallel to the longitudinal axis. In this case, the exit point for the cable leaving the control circuit and the entry point for the cable entering the sensor would need to be aligned.
  • the separate member is rotated relative to the cylindrical member about the longitudinal axis, and there is no guarantee that the exit and entry points for the cable will be aligned when the separate member and the cylindrical member are assembled in their final (relative) position.
  • a system, for installation of an electrical cable comprises a cylindrical member having a longitudinal axis; a first annular member secured to, and extending around, the outer surface of the cylindrical member; and a second annular member mounted on, and extending around, the first annular member and rotatable relative to the first annular member about the longitudinal axis; wherein the first and second annular members define an annularly extending channel therebetween for receiving a substantially U-shaped loop of the electrical cable; wherein the first annular member has a cable entry aperture at a predetermined position through which the electrical cable is capable of entering the annularly extending channel; and wherein the second annular member has a cable exit aperture through which the electrical cable is capable of exiting the annularly extending channel.
  • Cable fixation means are preferably located at the cable entry aperture.
  • the cable fixation means at the cable entry aperture are preferably integrally formed with the first annular member.
  • Cable fixation means are preferably located at the cable exit aperture.
  • the cable fixation means at the cable exit aperture are preferably integrally formed with the second annular member.
  • the first annular member preferably has an annular flange around one edge, and a number of radially outwardly directed tabs spaced around the other edge, for attaching the second annular member to the first annular member.
  • the first annular member may have a number of radially outwardly directed tabs spaced around one edge, and a number of radially outwardly directed tabs spaced around the other edge, for attaching the second annular member to the first annular member.
  • the present invention also includes a fuel injector having a system in accordance with the present invention, and an electric cable extending from one end of the cylindrical member along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis to the cable entry aperture of the first annular member, forming a substantially U-shaped loop in the channel between the first and second annular members, and extending from the cable exit aperture of the second annular member to the other end of the cylindrical member along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis, wherein the cylindrical member comprises an injector body and a cap nut screw-threaded to the injector body.
  • the electrical cable is preferably connected to control electronics at said one end of the cylindrical member, and to a sensor at said other end of the cylindrical member.
  • the sensor is preferably a pressure sensor.
  • the sensor is preferably mounted on the cap nut.
  • the fuel injector preferably further comprises a first metal shield covering the electrical cable between said one end of the cylindrical member and the cable entry aperture, and a second metallic shield covering the electrical cable between the cable exit aperture and said other end of the cylindrical member.
  • the system of the present invention overcomes the problem of potential misalignment when an electrical cable extends between the end of a cylindrical member.
  • Figure 1 is a perspective view of a system in accordance with the present invention.
  • Figure 2 is a perspective view of the first and second annular members of the system of Figure 1;
  • Figure 3 is a perspective view of an initial relative position of the first and second annular members on the cylindrical member of the system of Figure 1;
  • Figure 4 is a perspective view of a final relative position of the first and second annular members on the cylindrical member of the system of Figure 1;
  • Figure 5 is a side view of a fuel injector illustrating the problem to be solved
  • Figure 6 is enlarged side view of a portion of the fuel injector of Figure 5;
  • Figure 7 is a perspective view of a fuel injector incorporating the system of the present invention.
  • Figure 8 and 8A is an exploded view of the system of Figure 7. Description of the Preferred Embodiment
  • an electrical cable includes an electrical conductor or wire having a covering of electrically insulating material, which is capable of extending in a lengthwise direction, and which is flexible.
  • the system 10 of the present invention comprises a cylindrical member 12 having a longitudinal axis L; a first annular member 14 secured to, and extending around, the outer surface of the cylindrical member; and a second annular member 16 mounted on, and extending around, the first annular member.
  • the second annular member 16 is capable of rotation relative to the first annular member 14 about the longitudinal axis L.
  • the first and second annular members 14, 16 define an annularly extending (circumferentially extending), substantially enclosed, channel 18 therebetween.
  • the first annular member 14 has or defines a cable entry aperture 21 at a predetermined position.
  • the second annular member 16 has or defines a cable exit aperture 23.
  • the first annular member 14 preferably has an integral cable fixation means 20 associated with the cable entry aperture 21.
  • the second annular member 16 preferably has an integral cable fixation means 22 associated with the cable exit aperture 23.
  • the first annular member 14 includes an annular flange 34 around one circumferential edge 35, and a number of radially outwardly directed tabs 36 spaced around the other circumferential edge 37.
  • the circumferential edges 39, 41 of the second annular member 16 are positioned and retained between the flange 34 and the tabs 36 of the first annular member 14, such that the second annular member 16 is secured to the first annular member, but the second annular member is capable of rotating relative to the first annular member about the longitudinal axis L.
  • the flange 34 and tabs 36 define attachment means for securing the first and second annular members 14, 16 together but allowing relative rotation about the axis L.
  • An electrical cable 24 extends from a fixed point B on the circumference at one end 26 of the cylindrical member 12 to a point A on the circumference at the other end 28 of the cylindrical member by way of the cable entry aperture 21 and integral cable fixation means 20 on the first annular member 14, the channel 18 between the first and second annular members 14, 16, and cable exit aperture 23 and the integral cable fixation means 22 on the second annular member 16.
  • the electrical cable 24 enters the channel 18 by way of the cable entry aperture 21, and exits the channel by way of the cable exit aperture 23.
  • the electrical cable 24 is secured to both integral cable fixation means 20, 22, when present, such that the cable is securely held at the cable entry and exit apertures 21, 23, respectively.
  • the electrical cable 24 extends in a first circumferential direction, and then reverse circumferential direction, to lie in a substantially U-shaped loop, in the channel 18 between the first and second annular members 14, 16.
  • the cable entry aperture 21 and integral cable fixation means 20 on the first annular member 14 are positioned (location D) to substantially align with the fixed point B such that the electrical cable 24 extends in a direction substantially parallel to the longitudinal axis L of the cylindrical member 12 between point B and the integral cable fixation means 20 on the first annular member 14 (see Figures 1 and 4).
  • the position of point D is therefore predetermined and is dependent on the position of point B.
  • Point A is not predetermined, and may be at any location around the circumference of the cylindrical member 12 at the other end 28 thereof.
  • the second annular member 16 is rotated about the longitudinal axis L ( Figure 3) until the cable exit aperture 23 and integral cable fixation means 22 on the second annular member 16 reach a position (location C) which substantially aligns with point A such that the electrical cable 24 extends in a direction substantially parallel to the longitudinal axis L of the cylindrical member 12 between point A and the integral cable fixation means 22 on the second annular member 16 (see Figures 1 and 4).
  • the present invention therefore provides a system 10 for the installation of an electrical cable 24 between points A and B, which are longitudinally spaced apart, relative to axis L, on the circumference of a cylindrical member 12, in which point B is predetermined and fixed, but point A is not predetermined and could be at any random position.
  • the system 10 compensates for the uncertainty of the position of point A relative to point B.
  • the present invention has particular use in a fuel injector 100 as shown in Figures 5 and 6.
  • the fuel injector 100 comprises an injector body 102.
  • a header 104 with integrated electronics is secured to one end 106 of the injector body 102.
  • a cap nut 108 is screw-threaded to the other end 110 of the injector body 102.
  • a pressure sensor or other type of sensor 112 is mounted on the cap nut 108.
  • the integrated electronics and the pressure sensor are electrically connected by an electrical cable or insulated wire 24 extending in a direction substantially parallel to the longitudinal axis L of the injector body 102.
  • the system 10 of the present invention overcomes this problem.
  • the system 10 described above with respect to Figures 1 to 4 is installed on the injector body 102 and adjacent the cap nut 108.
  • the injector body 102 and cap nut 108 define a cylindrical member with the equivalent of point B on the injector body and point A on the cap nut.
  • the system 10 further includes a first elongate metallic shield 30 which extends in an axial direction along the injector body 102 and which includes a channel or track for substantially covering the electrical cable; and a second metallic shield 32 which has an annular portion fitting over the second annular member 16 and a channel or track, for covering the electrical cable, which extends in an axial direction along the cap nut 108.
  • the first annular member 14 is secured to the injector body 102.
  • the first shield 30 and its associated track define the path for the electrical cable from the header 104 (equivalent to point B) to the integral cable fixation means 20 on the first annular member 14.
  • the first shield 30 is attached to the integral cable fixation means 20 of the first annular member 14.
  • the second shield 32 and its associated track define the path for the electrical cable from the integral cable fixation means 22 on the second annular member 16 to the pressure sensor 112 (equivalent to point A).
  • the second shield 32 is attached to the second annular member 16 such that the track thereon aligns with the integral cable fixation means 22 on the second annular member.
  • the tracks of the first and second shields 30, 32 are aligned with the cable entry and exit apertures 21, 23, respectively.
  • the second annular member 16 and the second shield 32 are capable of rotation relative to the injector body 102, the second annular member and the second shield can be rotated to align the cable exit aperture 23 and integrated cable fixation means 22 on the second annular member 16 with the pressure sensor 112 on the cap nut 108, substantially improving the ease of installation.
  • the present invention has been described in relation to installation on a fuel injector, the system of the present invention may be used in other situations which require compensation for misalignment of an electrical cable between longitudinally and axially spaced points on the surface of a cylindrical member.
  • the integrated cable fixation means 20, 22 may take any suitable form which is capable of gripping the electrical cable 24 as the cable enters and leaves the channel 18. In some circumstances, the cable fixation means 20, 22 may be omitted, or may be formed separate from the associated annular member 14, 16. Further, the attachment means of the flange 34 and tabs 36 for securing the first and second annular members 14, 16 may be replaced by any other suitable attachment means (for example, spaced radially outwardly extending tabs around both circumferential edges 35, 37 of the first annular member, or spaced radially inwardly extending tabs around the circumferential edges 39, 41 of the second annular member which make a snap fit to the first annular member) which allows the first and second annular members 14, 16 to be secured together but capable of relative rotation about axis L.
  • the present invention provides a system which compensations for misalignment as explained above, and has the additional benefit of providing easier installation of the electrical cable. Further benefits include use of an electrical cable of predetermined length, and the removal of the need for

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A system (10) for the installation of an electrical cable (24), the system comprising a cylindrical member (12) having a longitudinal axis (L); a first annular member (14) secured to, and extending around, the outer surface of the cylindrical member; and a second annular member (16) mounted on, and extending around, the first annular member and rotatable relative to the first annular member about the longitudinal axis; wherein the first and second annular members define an annularly extending channel (18) therebetween for receiving a substantially U-shaped loop of the electrical cable; wherein the first annular member has a cable entry aperture (21) at a predetermined position through which the electrical cable is capable of entering the annularly extending channel; and wherein the second annular member has a cable exit aperture (23) through which the electrical cable is capable of exiting the annularly extending channel. The present invention also includes a fuel injector comprising the system.

Description

SYSTEM FOR INSTALLATION OF AN ELECTRICAL CABLE
Technical Field
The present invention relates to a system for the installation of an electrical cable.
Background of the Invention
A fuel injector comprises a cylindrical member having a longitudinal axis. An electrical control circuit is mounted on or adjacent one end of the cylindrical member. A sensor is mounted on a separate member located at the other end of the cylindrical member. An electrical cable extends between the control circuit and the sensor along the outer surface of the cylindrical member. The preferred arrangement is for the cable to extend in a direction which is substantially parallel to the longitudinal axis. In this case, the exit point for the cable leaving the control circuit and the entry point for the cable entering the sensor would need to be aligned. However, on assembly of the fuel injector, the separate member is rotated relative to the cylindrical member about the longitudinal axis, and there is no guarantee that the exit and entry points for the cable will be aligned when the separate member and the cylindrical member are assembled in their final (relative) position.
Summary of the Invention
It is an object of the present invention to provide a system which compensates for any such misalignment.
A system, for installation of an electrical cable, in accordance with the present invention comprises a cylindrical member having a longitudinal axis; a first annular member secured to, and extending around, the outer surface of the cylindrical member; and a second annular member mounted on, and extending around, the first annular member and rotatable relative to the first annular member about the longitudinal axis; wherein the first and second annular members define an annularly extending channel therebetween for receiving a substantially U-shaped loop of the electrical cable; wherein the first annular member has a cable entry aperture at a predetermined position through which the electrical cable is capable of entering the annularly extending channel; and wherein the second annular member has a cable exit aperture through which the electrical cable is capable of exiting the annularly extending channel.
Cable fixation means are preferably located at the cable entry aperture. In this case, the cable fixation means at the cable entry aperture are preferably integrally formed with the first annular member.
Cable fixation means are preferably located at the cable exit aperture. In this case, the cable fixation means at the cable exit aperture are preferably integrally formed with the second annular member.
The first annular member preferably has an annular flange around one edge, and a number of radially outwardly directed tabs spaced around the other edge, for attaching the second annular member to the first annular member. Alternatively, the first annular member may have a number of radially outwardly directed tabs spaced around one edge, and a number of radially outwardly directed tabs spaced around the other edge, for attaching the second annular member to the first annular member.
The present invention also includes a fuel injector having a system in accordance with the present invention, and an electric cable extending from one end of the cylindrical member along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis to the cable entry aperture of the first annular member, forming a substantially U-shaped loop in the channel between the first and second annular members, and extending from the cable exit aperture of the second annular member to the other end of the cylindrical member along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis, wherein the cylindrical member comprises an injector body and a cap nut screw-threaded to the injector body.
The electrical cable is preferably connected to control electronics at said one end of the cylindrical member, and to a sensor at said other end of the cylindrical member. In this case, the sensor is preferably a pressure sensor. In either case, the sensor is preferably mounted on the cap nut.
The fuel injector preferably further comprises a first metal shield covering the electrical cable between said one end of the cylindrical member and the cable entry aperture, and a second metallic shield covering the electrical cable between the cable exit aperture and said other end of the cylindrical member.
The system of the present invention overcomes the problem of potential misalignment when an electrical cable extends between the end of a cylindrical member.
Brief Description of the Drawings
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which: -
Figure 1 is a perspective view of a system in accordance with the present invention;
Figure 2 is a perspective view of the first and second annular members of the system of Figure 1;
Figure 3 is a perspective view of an initial relative position of the first and second annular members on the cylindrical member of the system of Figure 1;
Figure 4 is a perspective view of a final relative position of the first and second annular members on the cylindrical member of the system of Figure 1;
Figure 5 is a side view of a fuel injector illustrating the problem to be solved;
Figure 6 is enlarged side view of a portion of the fuel injector of Figure 5;
Figure 7 is a perspective view of a fuel injector incorporating the system of the present invention; and
Figure 8 and 8A is an exploded view of the system of Figure 7. Description of the Preferred Embodiment
The system of the present invention is for installation of an electrical cable. In the present invention, an electrical cable includes an electrical conductor or wire having a covering of electrically insulating material, which is capable of extending in a lengthwise direction, and which is flexible.
Referring to Figure 1 to 4, the system 10 of the present invention comprises a cylindrical member 12 having a longitudinal axis L; a first annular member 14 secured to, and extending around, the outer surface of the cylindrical member; and a second annular member 16 mounted on, and extending around, the first annular member. The second annular member 16 is capable of rotation relative to the first annular member 14 about the longitudinal axis L. The first and second annular members 14, 16 define an annularly extending (circumferentially extending), substantially enclosed, channel 18 therebetween. The first annular member 14 has or defines a cable entry aperture 21 at a predetermined position. The second annular member 16 has or defines a cable exit aperture 23. The first annular member 14 preferably has an integral cable fixation means 20 associated with the cable entry aperture 21. The second annular member 16 preferably has an integral cable fixation means 22 associated with the cable exit aperture 23.
The first annular member 14 includes an annular flange 34 around one circumferential edge 35, and a number of radially outwardly directed tabs 36 spaced around the other circumferential edge 37. On assembly, for example by a push snap fit, the circumferential edges 39, 41 of the second annular member 16 are positioned and retained between the flange 34 and the tabs 36 of the first annular member 14, such that the second annular member 16 is secured to the first annular member, but the second annular member is capable of rotating relative to the first annular member about the longitudinal axis L. The flange 34 and tabs 36 define attachment means for securing the first and second annular members 14, 16 together but allowing relative rotation about the axis L.
An electrical cable 24 extends from a fixed point B on the circumference at one end 26 of the cylindrical member 12 to a point A on the circumference at the other end 28 of the cylindrical member by way of the cable entry aperture 21 and integral cable fixation means 20 on the first annular member 14, the channel 18 between the first and second annular members 14, 16, and cable exit aperture 23 and the integral cable fixation means 22 on the second annular member 16. The electrical cable 24 enters the channel 18 by way of the cable entry aperture 21, and exits the channel by way of the cable exit aperture 23. The electrical cable 24 is secured to both integral cable fixation means 20, 22, when present, such that the cable is securely held at the cable entry and exit apertures 21, 23, respectively. The electrical cable 24 extends in a first circumferential direction, and then reverse circumferential direction, to lie in a substantially U-shaped loop, in the channel 18 between the first and second annular members 14, 16.
The cable entry aperture 21 and integral cable fixation means 20 on the first annular member 14 are positioned (location D) to substantially align with the fixed point B such that the electrical cable 24 extends in a direction substantially parallel to the longitudinal axis L of the cylindrical member 12 between point B and the integral cable fixation means 20 on the first annular member 14 (see Figures 1 and 4). The position of point D is therefore predetermined and is dependent on the position of point B. Point A is not predetermined, and may be at any location around the circumference of the cylindrical member 12 at the other end 28 thereof. The second annular member 16 is rotated about the longitudinal axis L (Figure 3) until the cable exit aperture 23 and integral cable fixation means 22 on the second annular member 16 reach a position (location C) which substantially aligns with point A such that the electrical cable 24 extends in a direction substantially parallel to the longitudinal axis L of the cylindrical member 12 between point A and the integral cable fixation means 22 on the second annular member 16 (see Figures 1 and 4).
The present invention therefore provides a system 10 for the installation of an electrical cable 24 between points A and B, which are longitudinally spaced apart, relative to axis L, on the circumference of a cylindrical member 12, in which point B is predetermined and fixed, but point A is not predetermined and could be at any random position. The system 10 compensates for the uncertainty of the position of point A relative to point B.
The present invention has particular use in a fuel injector 100 as shown in Figures 5 and 6. The fuel injector 100 comprises an injector body 102. A header 104 with integrated electronics is secured to one end 106 of the injector body 102. A cap nut 108 is screw-threaded to the other end 110 of the injector body 102. A pressure sensor or other type of sensor 112 is mounted on the cap nut 108. The integrated electronics and the pressure sensor are electrically connected by an electrical cable or insulated wire 24 extending in a direction substantially parallel to the longitudinal axis L of the injector body 102. Because of the screw-thread connection between the injector body 102 and the cap nut 108, the position of the pressure sensor 112 relative to the injector body 102 cannot be predetermined (as illustrated in Figure 6). As a consequence, as illustrated in Figures 5 and 6, the desired path of the electrical cable 24 along the injector body 102 and the cap nut 108 respectively may be misaligned, thereby creating installation problems.
The system 10 of the present invention overcomes this problem. As illustrated in Figures 7 and 8, the system 10 described above with respect to Figures 1 to 4, is installed on the injector body 102 and adjacent the cap nut 108. In this example, the injector body 102 and cap nut 108 define a cylindrical member with the equivalent of point B on the injector body and point A on the cap nut. The system 10 further includes a first elongate metallic shield 30 which extends in an axial direction along the injector body 102 and which includes a channel or track for substantially covering the electrical cable; and a second metallic shield 32 which has an annular portion fitting over the second annular member 16 and a channel or track, for covering the electrical cable, which extends in an axial direction along the cap nut 108. The first annular member 14 is secured to the injector body 102. The first shield 30 and its associated track define the path for the electrical cable from the header 104 (equivalent to point B) to the integral cable fixation means 20 on the first annular member 14. The first shield 30 is attached to the integral cable fixation means 20 of the first annular member 14. The second shield 32 and its associated track define the path for the electrical cable from the integral cable fixation means 22 on the second annular member 16 to the pressure sensor 112 (equivalent to point A). The second shield 32 is attached to the second annular member 16 such that the track thereon aligns with the integral cable fixation means 22 on the second annular member. If the cable fixation means are omitted, the tracks of the first and second shields 30, 32 are aligned with the cable entry and exit apertures 21, 23, respectively. As the second annular member 16 and the second shield 32 are capable of rotation relative to the injector body 102, the second annular member and the second shield can be rotated to align the cable exit aperture 23 and integrated cable fixation means 22 on the second annular member 16 with the pressure sensor 112 on the cap nut 108, substantially improving the ease of installation.
Although the present invention has been described in relation to installation on a fuel injector, the system of the present invention may be used in other situations which require compensation for misalignment of an electrical cable between longitudinally and axially spaced points on the surface of a cylindrical member.
The integrated cable fixation means 20, 22 may take any suitable form which is capable of gripping the electrical cable 24 as the cable enters and leaves the channel 18. In some circumstances, the cable fixation means 20, 22 may be omitted, or may be formed separate from the associated annular member 14, 16. Further, the attachment means of the flange 34 and tabs 36 for securing the first and second annular members 14, 16 may be replaced by any other suitable attachment means (for example, spaced radially outwardly extending tabs around both circumferential edges 35, 37 of the first annular member, or spaced radially inwardly extending tabs around the circumferential edges 39, 41 of the second annular member which make a snap fit to the first annular member) which allows the first and second annular members 14, 16 to be secured together but capable of relative rotation about axis L. The present invention provides a system which compensations for misalignment as explained above, and has the additional benefit of providing easier installation of the electrical cable. Further benefits include use of an electrical cable of predetermined length, and the removal of the need for intermediate cable connections.

Claims

Claims
1. A system (10) for the installation of an electrical cable (24), the system comprising a cylindrical member (12) having a longitudinal axis (L); a first annular member (14) secured to, and extending around, the outer surface of the cylindrical member; and a second annular member (16) mounted on, and extending around, the first annular member and rotatable relative to the first annular member about the longitudinal axis; wherein the first and second annular members define an annularly extending channel (18) therebetween for receiving a substantially U-shaped loop of the electrical cable; wherein the first annular member has a cable entry aperture (21) at a predetermined position through which the electrical cable is capable of entering the annularly extending channel; and wherein the second annular member has a cable exit aperture (23) through which the electrical cable is capable of exiting the annularly extending channel.
2. A system as claimed in claim 1, further comprising cable fixation means (20) at the cable entry aperture (21).
3. A system as claimed in claim 2, wherein the cable fixation means (20) at the cable entry aperture (21) is integrally formed with the first annular member (14).
4. A system as claimed in any one of claims 1 to 3, further comprising cable fixation means (22) at the cable exit aperture (23).
5. A system as claimed in claim 4, wherein the cable fixation means (22) at the cable exit aperture (23) is integrally formed with the second annular member (16).
6. A system as claimed in any one of claims 1 to 5, wherein the first annular member (14) has an annular flange (34) around one edge, and a number of radially outwardly directed tabs (36) spaced around the other edge, for attaching the second annular member (16) to the first annular member.
7. A system as claimed in any one of claims 1 to 5, wherein the first annular member (14) has a number of radially outwardly directed tabs spaced around one edge, and a number of radially outwardly directed tabs spaced around the other edge, for attaching the second annular member (16) to the first annular member.
8. A fuel injector (100) comprising a system (10) as claimed in any one of claims 1 to 7, and an electric cable (24) extending from one end (106) of the cylindrical member (102, 108) along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis (L) to the cable entry aperture (21) of the first annular member (14), forming a substantially U-shaped loop in the channel (18) between the first and second annular members (14, 16), and extending from the cable exit aperture (23) of the second annular member to the other end (110) of the cylindrical member along the outer surface of the cylindrical member in a direction substantially parallel to the longitudinal axis, wherein the cylindrical member comprises an injector body (102) and a cap nut (108) screw-threaded to the injector body.
9. A fuel injector as claimed in claim 8, wherein the electrical cable (24) is connected to control electronics (104) at said one end (106) of the cylindrical member (102, 108), and to a sensor (112) at said other end (110) of the cylindrical member.
10. A fuel injector as claimed in claim 9, wherein the sensor is a pressure sensor (112).
11. A fuel injector as claimed in claim 8 or claim 9, wherein the sensor (112) is mounted on the cap nut (108).
12. A fuel injector as claimed in any one of claims 8 to 11, further comprising a first metal shield (30) covering the electrical cable (24) between said one end (106) of the cylindrical member (102, 108) and the cable entry aperture (21), and a second metallic shield (32) covering the electrical cable between the cable exit aperture (23) and said other end (110) of the cylindrical member.
EP10707003A 2009-03-26 2010-03-03 System for installation of an electrical cable Withdrawn EP2412069A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0905224A GB0905224D0 (en) 2009-03-26 2009-03-26 System for installation of an electrical cable
PCT/EP2010/052674 WO2010108766A2 (en) 2009-03-26 2010-03-03 System for installation of an electrical cable

Publications (1)

Publication Number Publication Date
EP2412069A2 true EP2412069A2 (en) 2012-02-01

Family

ID=40671769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10707003A Withdrawn EP2412069A2 (en) 2009-03-26 2010-03-03 System for installation of an electrical cable

Country Status (3)

Country Link
EP (1) EP2412069A2 (en)
GB (1) GB0905224D0 (en)
WO (1) WO2010108766A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5969373B2 (en) * 2012-12-13 2016-08-17 株式会社ケーヒン Fuel injection valve with in-cylinder pressure sensor
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WO2010108766A3 (en) 2011-07-28
WO2010108766A2 (en) 2010-09-30

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