JPS58167242A - Laying system for wire harness - Google Patents

Abstract

PURPOSE:To prevent noise interference with the car radio, in wire harnesses of a car, by separating wire harnesses for electric outfits from the day fogger and by making wiring for the harness's portion leading to the rear speaker by pair twisting. CONSTITUTION:In laying a body harness between the dash side and the rear, the wire harnesses 13B and 13A for electric outfits are separated from the day fogger, and that portion of harness 13A for electric outfits which shall lead to the rear speaker, 35R and 35L, is wired by pair twisting. Accordingly noises likely generated in the electric outfits are hindered from being induced into the day fogger or rear speaker's harnesses 13B, 35R, 35L, whereby noise interference with car ratio can be prevented. Also the power supply harness 55 for rear day fogger is equipped with an inductor filter 27 near the input terminal of day fogger sensor amplifier 28 through noise preventive filter elements 57R, 57L between wire harhess 13B and body panel in order to have a further enhanced noise prevention effect.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is aimed at combating the wiring method of a wire harness and preventing the generation of radio noise, particularly in a vehicle having a rear defogger and a radio antenna.

Vehicles generally have many sources of radio noise, so various measures have been taken, such as installing noise prevention devices for each noise source. In particular, car radios Nowadays, radios have become indispensable accessories for vehicles, and if the performance of the radio is hampered by these noises, it also affects the commercial value of the vehicle itself, so various methods have been used to control radio noise. A lot of research is being done.

Therefore, first, the conventional technology will be explained.

Figure 1 shows the layout*mm of a general passenger car, and mainly shows the engine room on the right side A, the left side of the engine room B, the engine section C, the dash section, the instrument section E, and the right side of the dash side. p', 71112 A part G
, body side right side part H, body side left side part I, ) rank room part J.

And part A contains battery /, main node - Nesco, and B
The main harness J is in the section, and the EGI Ha is in the C section.

- There is a switch harness z in the 1st part, an instrument harness 4 in the pm part, a mediharness/J in the H part, and a trunk room harness 19 in the J part.

FIG. 1 is a wiring diagram of the right side portion y of the dash. In addition to the instrument harness 6, this F section contains a room lamp harness 7 and a fuse box l.

Time control unit9. Auto door wake timer 0. There is a power wind body now.

The body harness 13 is an air conditioner/audio harness that goes to the dash on the right side r of the dash.
Separated from 2, the following bodeino)-nes/3 is,
All are tied together and wired to the body panels.

FIG. 3 is a wiring diagram of a conventional body harness/J on the right side H of the body. In this H section, the handbrake harness is connected from the body harness 13.

Seat belt harness /j is separated. here 14
is the handbrake, 17 is the control box, /l
is the door.

Figures 1 and 5 show an example of conventional wire harness wiring for a vehicle that has a rear defogger and a radio antenna on the rear window. FIG. 5 shows the wiring state when looking down at the rear of the vehicle from above the parcel tray panel.

Hereinafter, in explaining the wiring configuration of this wire harness, the wiring will be divided into two types and explained.

In other words, the thick solid lines indicate the wiring connected to the radio antenna and the rear defogger-related equipment, and the thick dashed lines indicate the radio and rear defogger-related wiring arranged on the back side of the shield when viewed from the viewpoint. shall be indicated.

In addition, the two parallel solid lines indicate the wiring connected to the tee, lamp, speaker, motor, air purifier, etc., and the broken parallel line indicates the back side of the shield as seen from the viewpoint. The wires for these lights, etc., which were cut off in the following manner, are shown below.

In the figure, I is a radio antenna, and n is a rear defogger. These multi-wire radio antenna l and rear defogger n are both printed with conductors on the passenger compartment side of the rear glass n on the rear surface of the vehicle, and are connected to defogger power supply terminals JFR and JL provided on both sides of the rear glass B, respectively. .

The reason why the radio antenna I is electrically integrated with the rear defogger n in this way is to improve the sensitivity of the radio antenna 1 in store zones by using the rear defogger n as an antenna as well.

In addition, in FIG. 1, AT is an antenna output terminal,
It is connected to an on-vehicle radio via a shield lk (not shown).

Here, the wire harness 2tR connected to the defotsuga power supply terminal 20H is guided to the right (left side of the vehicle) along the top surface of the parcel tray channel (hereinafter simply referred to as "tray panel") 2t, and the defotsuga power supply Terminal λ((L
The wires connected to the wires /)-nes and 2jL are guided to an inductor filter 1 for high frequency noise reduction provided at the bottom of the tray panel.

From here, wire harnesses 2JR and ff1L are combined to form wire harness n, and are wired along the lower rear surface of the tray and flannel toward the right side of the vehicle together with other wire harnesses.

I is a defogger seven pan installed below the rear defogger n. The rear defogger is turned on and off by the sensor signal detected by the defogger sensor 1. The wire harnesses 7R and 29L connected to both terminals of the defo-tsuga 7-socket pass through the tray panel, and then form a wire harness together with the wire harness B mentioned above on the lower surface side thereof.

In the following description, these defogger-related wire harnesses ER, 2JL, B, EK, 29L, and M will be collectively referred to as a defogger wire harness.

Also, in Figures 3 and 5, 3/R and J/
L is the rear speaker, and V is the trunk room lamp.

Wire harnesses BR and 35L1 connected to rear speakers J/R and 31, and wire harnesses 3 and 3 connected to trunk lamp 3 and air cleaner I#v, respectively, The above wire harness 3Q is bundled one after another.
They are bundled together to form a wire harness 3t.

Here, in FIGS. 3 and 5, the hatched portions of lines representing parallel wire harnesses indicate the state of combined wire harness wiring.

Next, wire harness NR connected to combination lamps 3gR and 34tL and ? ? The 2 L wires are guided as 7 wires toward the rear right side wall of the vehicle towards the train harness, and are then combined with the wire harness 3g on the underside of the tray panel to form the rear main harness V, which connects the rear seat pack body. The top of the Nozeneruji/ is routed with the top facing towards the front of the vehicle.

Here, among the wire harnesses forming the rear main harness m, the wire harnesses 29R and 2qL connected to the defogger sensor are connected to the defogger amplifiers 29R and 2qL in the middle of the wiring of the rear main harness V. equipped.

In addition, in the following explanation, wire bar desks connected to electrical components JJR, BL, mu, j7, jFR and I
When L is collectively referred to as an electrical wiring harness.

However, in such a conventional wiring part of the wire harness in the rear part, the wire harness B connected to the rear defogger n and the defogger sensor 1,
Wire harness X, which bundles JR and 29L, connects speakers J/R and J/L, trunk lamp 32.
A rear main harness is formed by bundling a wire harness J9R, IfL, etc., which are connected to various electrical components such as the air cleaner 33, over a long section as shown by diagonal lines.

For this reason, contact noise and slider noise that occur when electrical components are turned on and off are superimposed on the electrical equipment wire harness, and the superimposed noise is combined with these wire harnesses into a single bundle. It is led to the wire harness B of the defogger sensor X and J'PR, 29Lll, and mixed into the radio antenna 1. Furthermore, since it is also induced by rear speaker harness HR and B'L,
There was a lot of static on the radio. Furthermore, in order to prevent the generation of such noise, it is necessary to take measures such as installing a noise preventer for each electrical component that is a noise source.

An object of the present invention is to eliminate the above-mentioned drawbacks, and to separate the default wire harness and the electrical wiring harness from each other when wiring the rear body harness from at least the dash side of the vehicle, and furthermore, to By twisting and wiring the speaker harness in a pair-twisted manner, noise generated from electrical components is not conducted to the default wire harness or the speaker harness via the body harness or electrical wire harness, and is routed to the car radio. An object of the present invention is to provide a wiring method for a wire harness that prevents noise from being mixed in.

A second object of the present invention is to provide power supply to the C1 rear defogger in addition to the above when wiring a wire harness for a vehicle in which the radio antenna is located close to the rear defogger or integrated with the rear window. An inductor filter is interposed in the harness, and the defogger wire harness and the body It is an object of the present invention to provide a wiring method for a wire harness in which a noise prevention filter element is interposed between the panel and the panel to further enhance the noise reduction effect.

The present invention will be described in detail below based on the drawings.

Below, the explanation will be continued using the same reference numerals for the same parts as used in FIGS. 1 to 1. Figures 1 and 7 show an embodiment of the present invention. In Figure 4, /JB is the default wire harness, and as shown in this figure, on the body side behind the dash side, the body harness /JB is the default wire harness.
Separate the wire harness into a defogger wire harness/JB and other electrical wiring harnesses/JA, and wire them so that the separation interval is at least 3 cm or more. In addition,,,,
Here, among the electrical equipment wire harnesses/JA, rear speaker wire harnesses 3SR and Jj
Twist L as shown in FIG.

In the twisted speaker harnesses 33R and 35L, for example, if the contact noise current IN is superimposed on the rear turn signal harness 39R (see Figure 5), the harnesses 33R and 3jL will have a Induced voltages VNx, Vh and v as shown by arrows in Figure 7
NL + v%1. occurs. By twisting the harnesses 33R and 33L in this way, the directions of the differential components of the induced voltage are alternately opposite in the front and back, that is, the induced voltages VNR and ■☆R, and VNL and V/JL. are in opposite directions and cancel each other out, so that the induced voltage is eliminated.

In other words, by using the wiring method as described above,
Combination lamp 3 (l R, 30L, etc.) The contact opening/closing noise and sliding noise that occur during the on/off opening/closing operation of the R, 30L, etc. wire harness/J
B and rear speaker wire harnesses BR, 3JL.For example, if a harness with contact opening/closing noise is bundled with other harnesses, about 60% of the induction However, according to experiments conducted by the present applicant, the induction can be reduced to about 10% by wiring these harnesses tj~101 at separate intervals, as described above. It was also confirmed that the generation of induced voltage to the same extent can be prevented by twisting the rear speaker harnesses JJR and JjL at a pitch of approximately ja+.

Next, an embodiment in the rear parcel section, which is located in front of the trunk section J of the vehicle, will be described in t54.

Here, the electrical equipment, namely trunk room lamp 3λ, air purifier #! I37, Xbee j Jj l and J
jL, and Fubinesi Sounlamp j#l and M
The wiring method for each wire harness connected to L is the same as the conventional method.

However, the wire harness jj connected to the input terminal side of the inductor filter l for high frequency noise reduction is connected from the inductor filter I to the rear end of the vehicle of the rear parcel tray panel U, like the conventional wire harness B shown in Fig. Along the line, a wire harness 31 is connected to other electrical equipment.
Rather than being wired together with L, and separate it from the electrical wiring.

Moreover, the wire harnesses R and ffL connected to the terminals of the defogger sensor I shown in FIG. 4 are conventional wire harnesses, ? Instead of forming the wire harness 31 together with the electrical wiring harness like FR and 29L, the upper surface of the tray panel panel is connected to the sensor amplifier by connecting it to the sensor amplifier independently, and the output 1
g9 & wire harness j! This is combined with the Defogger Wire Harness/JB, and wired to the dash side part in a state separated from the electrical wiring harness/JA as the body harness as described above.

In addition, noise reduction is performed between the wires 1IFR and 1IIL and the rear seat pack l panel #/ (conducted with the body panel Filter elements 17 B and j7 made of ceramic capacitors etc. with a capacitance of 0.0/11118 degrees for
By wiring the 9 ear harnesses in this way, the wire harnesses Bn, nL, and 11 connected to the defogger connection are
．． It, lfB, and FFL (this is collectively referred to as Default Wire Harness/J1) and Electrical Wire Harness/3
Since it is possible to separate the electrical equipment wire harness/IB from the noise signal superimposed on the electrical equipment wire harness/JM, it is prevented from being induced into the defogger wire harness/IB.

Here, it was found in Experiment 1 that when the filter element It l, 17 L was inserted on the output side of the defogger sensor amplifier q, that is, towards the defogger wire harness /jl, the effect of inserting the filter element was reduced. It's heavy, so wire the default wire harness/J l at the rear of the vehicle from the rear seed grasshopper panel V to the top of the tray panel, and wire the electrical wiring harness/J A to the bottom of the tray panel surface. ), so the tray panel can have a shielding effect.
-ness/3 A means the 1st. The main harness control is formed at the dash side part F shown in Fig. 2.
It is possible to almost avoid noise being induced into B.Although it is slight, the noise induced into B can be avoided by defogging wire harness/J in the main node 1-Nesco. Of B, rear defogger n wire harness, 25R, ffL and j! An inductor filter l is connected between the wire harnesses R and L of the defo sensor I, and a capacitor filter as a noise prevention filter element is placed near the input terminal of the defo sensor amplifier p. By connecting A R and 77 L and grounding the body '5, it is possible to eliminate even a slight noise superimposed on the defogger wire/1-ness.

Note that the filter elements 11B and 17 used here
As L, 0.00/sF ~0JJIF iji
From a cost standpoint, it is preferable to use a ceramic capacitor with a capacitance of about 1000 yen. If the capacitance is smaller than this, the filtering effect will be reduced, and if the capacitance is larger than this, there is a risk of adversely affecting the operation of the sensor amplifier. There is also ◇ Input wire bar table to 1 inductor file★l!
If J is pulled out from the rear of the vehicle and bundled together with the output wire harness JJR and ttL of inductor filter l as in the past, the filtering effect of inductor filter l will be lost due to the induction of noise between the input and output lines. In this example, the wire harness! j is drawn out from the front side of the vehicle of the inductor filter n as shown in the figure, and the input and output lines are respectively taken out from the opposing surfaces of the filter case.

Note that the wiring of the wiring harness behind the dash side has been considered to prevent noise from entering the car radio, but there are other ways in which noise can enter, such as direct radiation from the instrument harness. It is thought that noise may be introduced into the radio antenna due to such factors.

However, it has been confirmed through experiments that the noise from such a path is extremely small. Therefore, in order to effectively reduce radio noise, the above-mentioned wiring method and interposition of a filter are sufficient.

Furthermore, since a shield tS<not shown) is used from the antenna output terminal AT (see Figure 1) to the in-vehicle radio (not shown), noise will not be mixed in from the shielded wire.

FIG. 9 is a comparison diagram of noise measured at the terminals of a radio speaker.

Here, the horizontal axis lists the operations of in-vehicle electrical components as noise generation sources. The vertical axis indicates the magnitude of the generated noise expressed in terminal voltage (Vp-de) at the speaker terminal of the radio. Moreover, the black circles are the measured values of noise according to the conventional example, and the white circles are the measured values of noise according to the embodiment of the present invention.

The values shown are the average values measured at several points in the shoulder wave of the radio frequency band 3, and the arrow G indicates the noise reduction effect achieved by implementing the present invention.As is clear from this figure, The level of noise generated in the radio by various in-vehicle electrical components is uniformly reduced by using the wiring method according to the present invention.

As explained above, according to the present invention, when wiring the L-day harness at least behind the dash side of the vehicle, the defogger wire harness related to the rear defogger is connected to electrical components such as various lamps and motors. The electrical equipment wire harnesses and the electrical equipment wire harnesses are arranged at a distance from each other, and the wire harnesses are twisted in pairs, so that the noise generated in the electrical equipment is removed from the body harness and the electrical equipment wire harnesses. It is possible to prevent noise from being guided to the default wire harness or the Yaspee wire harness through the wire, thereby preventing noise from entering the car radio.

According to the second invention, in addition to the above-mentioned invention, in a vehicle in which the radio antenna is located close to the rear defogger or is integrated with the rear windshield, the wire harness connected to the defogger sensor can be connected to the sensor amplifier. A capacitor filter is inserted as a noise prevention filter element between this wire harness and the body panel at the position immediately before connection, so the noise remaining in the default wire harness is further reduced. Therefore, the noise reduction effect in the car radio can be further enhanced.

It goes without saying that the present invention can be widely applied to this type of vehicle, and by applying the method of the present invention, it is no longer necessary to take noise prevention measures for each vehicle type and electrical component as in the past. This also contributes to shortening the development period.

[Brief explanation of the drawing]

Figure 1 shows wiring connections in general passenger cars.11
A perspective view, Fig. 2 is a harness wiring diagram in the dash side part, Fig. 3 is a harness wiring diagram in the body side part, and Figs. 7 is a front view and a top view showing the state of the wiring harness, FIG. Figure 9 shows the wiring diagram for the trunk room and rear parcel area to which the second invention method is applied, and Figure 9 shows the measured values of the noise generated by the in-vehicle radio using the conventional wire harness wiring and the wiring harness according to the present invention. This is a comparison graph. A... Right side of the engine room, B... Left side of the engine room, C... Engine section, D... Dash section, E
...Instrument section, F...Dash side right side, G...Floor section 1, H...Body side right side, ■...Body side left side, J...Trunk room section, l...Battery, 2.
3...Main harness, D...EGI harness, j...Switch harness, ≦...Instrument harness, 7...Room lamp harness, l...Fuse box, ! ...Time control unit, 10...Auto door lock tie'vS7...Power window timer, λ...Air conditioner/audio harness, /3...
・Body harness, /3 A...Electrical wire harness, /J B...Default wire harness 11 da, /
3... Wire harness, /6... Site brake, /7... Control box, /I... Door, /9... Trunk room harness, I... Radio antenna, n... Rear defogger, B...Rear glass, 2gR, 241L.
・Power supply terminal, BR, BL...Wire harness, B...Tray panel, Katana...Inductor filter, I...Defogger sensor, 7R, 29L, M...Wire harness, JjR,
3/L...Rear speaker, 32...Trunk room lamp, 33...Air purifier, 11-R, 3'PL...Combination lamp, j
JR! 3L, Jj, J7', M... Wire harness, R, J? L...Wire harness, V...Rear main harness, L/...Rear seat back body panel, Invasion...%
%defotsuga sensor amplifier, P9R, Misaki L, , tj
...Wire harness! 7 R, ff L...filter element. Patent Applicant: Nissan Motor Co., Ltd. Figure 4 Figure 5 Figure 6 Figure 1 ------- ■-, -J zu/jB 1) Figure 1 1 Steam voice

Claims (1)

[Claims] 1) When wiring a wiring harness for a vehicle that has a rear defogger, a radio antenna, electrical components such as various lamps and various motors, and a Yasby force that distributes power to the tray panel section, the vehicle A wire harness wiring method, characterized in that the wire harness is arranged from at least the dash side of the electrical equipment wire harness, and the wire harness for the rear speaker of the electrical equipment wire harness is twisted and wired in pairs. 2) A radio antenna that is attached to the rear glass or installed close to or integrated with the rear defogger, electrical components such as various lamps and various motors, and a Yasby force that is placed on the tray panel. When wiring a wire harness for a vehicle that has a rear defogger, the defogger wire harness related to the rear defogger and the electrical equipment wire harness connected to the electrical component are arranged so as to be separated from each other at least in a region behind the dash side of the vehicle. Among the electrical wiring harnesses, the rear speaker wiring harness is twisted and wired in pairs, and a filter element for noise prevention is interposed between the defogger wiring harness and the body panel of the vehicle. A wire harness wiring method characterized by wiring.