JP2001323851A - Harness structure for parts associated with engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the harness structure for parts associated with an engine capable of improving the assembling property of the parts associated with the engine, reducing the weight thereof, and lowering the cost. SOLUTION: In this harness structure for parts associated with an engine, a control unit 11 for controlling the engine is arranged in an air cleaner 12 provided near the engine, and a connecting circuit 15 for electrically connecting the control unit 11 to the air cleaner 12 or connecting electrical parts (an air flow meter 13 and a throttle sensor 14) arranged in the periphery thereof to each other is integrally arranged with a case body 16 of the air cleaner 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a harness structure for an engine-related part.

[0002]

2. Description of the Related Art FIG. 4 is a view schematically showing a conventional harness structure in an engine room and a peripheral portion thereof. In the engine room, as shown in FIG. 4, a main harness 101 (see FIG.
, And an engine harness 103 (shown by a solid line in FIG. 4) for connection between engine-related components and the like.

In this harness structure, engine-related electrical components such as an ignition coil, an injector, and other various sensors, and a control unit 107 for controlling an engine disposed in a vehicle cabin are connected to the engine harness 103.
To make an electrical connection.

[0004] Such a conventional engine harness 103
Is partially connected to electrical components on the engine 105 side at an engine factory of a car manufacturer, and the engine 10
5, but in this state, the engine 10
The other portion of the engine harness 103 that is to be drawn out of the engine 5 is temporarily fixed to the engine 105 by an auxiliary tool such as a tape. And this engine 105
However, after being transported to the main line of automobile production and mounted on the vehicle body, auxiliary tools such as tapes are removed and connected to the electric components and the control unit 107 which are disposed in advance on the vehicle body side.

[0005]

However, in the conventional harness structure, it is necessary to connect the engine-related electrical components such as injectors and the control unit 107 in the vehicle cabin with the engine harness 103. However, there is a problem that the weight is long and heavy, and the workability of the wiring work to the vehicle body is poor, and also there is a problem in terms of cost. In addition, a troublesome work of attaching the waterproof grommet 109 to the vehicle body is also required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a harness structure for an engine-related part which can improve the assemblability of the engine-related part, reduce the weight and reduce the cost.

[0007]

A technical means for achieving the above object is that a control unit for controlling an engine is arranged in an air cleaner installed around an engine, and is arranged in or around the air cleaner itself. A connection circuit for making electrical connection between the electrical component and the control unit is provided integrally with the case body of the air cleaner.

[0008] Preferably, the connection circuit is formed of a bus bar or a single core conductor, and is integrally embedded in the case body.

Preferably, the connection circuit is formed of a flat cable, and is integrally fixed along an inner surface of the case body.

[0010] Preferably, the electric component includes at least one of an air flow meter and a throttle sensor.

[0011]

FIG. 1 is a partially cutaway perspective view showing the structure of an air cleaner to which a harness structure of an engine related portion according to a first embodiment of the present invention is applied, and FIG. 2 is a perspective view of the air cleaner of FIG. It is a figure which shows a planar structure typically.
It is assumed that the air cleaner 12 to which the present embodiment is applied is installed around the engine.

[0012] In the harness structure of the engine-related portion,
As shown in FIGS. 1 and 2, a control unit (for example, an EFI-ECU) 11 for controlling an engine is arranged in an air cleaner 12 installed around the engine, and is arranged on or around the air cleaner 12 itself. A connection circuit 15 for making an electrical connection between electrical components (here, an air flow meter 13 and a throttle sensor 14) and the control unit 11 is provided integrally with a case body 16 of the air cleaner 12.

The case body 16 is configured such that a filter (not shown) can be accommodated and arranged in its upper opening, and a cover (not shown) is attached so as to close the upper opening in which the filter is arranged. . Then, when air from the outside introduced through the air intake path on the cover portion side passes through the filter in the case body 16, foreign substances contained in the air are removed. As a result, the clean air is supplied to each combustion chamber through the air flow meter 13, the throttle body 17, and the intake manifold.

On one side of the case body 16, there is formed a partition wall portion 18 for forming a housing space for the control unit 11 between the case body 16 and the inner wall surface thereof. A waterproof connector 20 that can be connected to a connector (not shown) on the control unit 11 side is provided at the bottom of the case body 16 in the space. A waterproof connector 21 that can be connected to a connector (not shown) on the air flow meter 13 side and a waterproof connector 22 that can be connected to a connector (not shown) on the throttle sensor 14 side are provided at the bottom inside the case body 16. Have been.

Correspondingly, the connection circuit 15 is integrally embedded in the bottom wall 23 of the case body 16 so as to electrically connect the waterproof connector 20 and the waterproof connectors 21 and 22. . In the present embodiment, the connection circuit 15
Is constituted by a plurality of bus bars or single-core conductors embedded in the bottom wall portion 23. The control unit 11 and the air flow meter 1 are connected via the connection circuit 15.
3 and the throttle sensor 14 are connected.

The control unit 11 includes a waterproof connector 20
(Not shown) for connection to a power supply system and connectors 11a, 11b, 11c for connection to a power supply system and other electrical components.
Is provided.

As described above, according to the present embodiment, the control unit 11 for controlling the engine is arranged on the air cleaner 12 installed around the engine, and the control unit 11 and the air cleaner 12 themselves or on the periphery thereof. Connection circuit 1 for making electrical connection between the electric components (here, air flow meter 13 and throttle sensor 14)
5 is provided integrally with the case body 16 of the air cleaner 12, so that the airflow meter 13, the harness between the throttle sensor 14 and the control unit 11 can be omitted, and the complicated assembling work thereof is also omitted. As a result, it is possible to improve the assemblability of the engine-related parts, reduce the weight, and reduce the cost.

Also, since the connection circuit 15 is embedded in the bottom wall 23 of the case body 16 of the air cleaner 12,
In addition to improving the appearance of the peripheral portion of the engine (particularly, the air cleaner 12), the connection circuit 15 is less likely to be damaged, and the reliability of the electrical connection can be improved from this point.

Further, since the control unit 11 is disposed in the case body 16 of the air cleaner 12,
Thus, the control unit 11 can be protected.

The control unit 11 controls the air cleaner 1.
2, the length of the engine harness when connecting the control unit 11 to electrical components on the vehicle body can be shortened, so that the weight and cost can be reduced, and the conventional grommet shown in FIG. 109 is also unnecessary, and the work of assembling the vehicle body can be simplified.

FIG. 3 is a partially cutaway perspective view showing a configuration of an air cleaner to which a harness structure of an engine related portion according to a second embodiment of the present invention is applied. Note that the only difference between the harness structure of the engine-related part according to the present embodiment and the harness structure of the engine-related part according to the first embodiment is that the harness structure is related to the arrangement of the connection circuit 15. Portions are given the same reference numerals and description thereof is omitted.

In this embodiment, as shown in FIG. 3, the connection circuit 15 is formed of a flat cable, and is integrally fixed along the bottom inner surface of the case body 16 with an adhesive.

As described above, also in the present embodiment, the same effects as in the first embodiment can be obtained.

In each of the above-described embodiments, other electrical components such as a junction connector and a noise filter may be additionally provided as electrical components disposed on or around the air cleaner 12 itself.

[0025]

According to the first to fourth aspects of the present invention, the control unit for controlling the engine is arranged on the air cleaner installed around the engine, and is arranged on the air cleaner itself or around it. Since the connection circuit for performing the electrical connection between the electric component and the control unit is provided integrally with the case body of the air cleaner, the harness between the electric component and the control unit can be omitted and the complicated assembly thereof can be performed. The operation can also be omitted, and as a result, the assemblability of the engine related parts can be improved, the weight can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an air cleaner to which a harness structure of an engine related part according to a first embodiment of the present invention is applied.

FIG. 2 is a diagram schematically showing a planar configuration of the air cleaner of FIG. 1;

FIG. 3 is a partially cutaway perspective view showing a configuration of an air cleaner to which a harness structure of an engine related part according to a second embodiment of the present invention is applied.

FIG. 4 is a diagram schematically showing a conventional harness structure in an engine room and a peripheral portion thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Control unit 12 Air cleaner 13 Air flow meter 14 Throttle sensor 15 Connection circuit 16 Case body 20, 21, 22 Waterproof connector

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takao Nozaki 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Inside Harness Research Institute, Inc. (72) Inventor Takamitsu Miyamui 1, Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture No.7-10 Harness Research Institute, Inc. F-term (reference) 5G309 AA11 LA27 5G363 AA17 BA02 BA05 DC02

Claims (4)

[Claims] A control circuit for controlling an engine is arranged in an air cleaner installed around an engine, and a connection circuit for making an electrical connection between the control unit and an electric component installed in or around the air cleaner itself. But,
A harness structure for an engine-related portion, wherein the harness structure is provided integrally with a case body of the air cleaner. 2. The harness structure for an engine-related part according to claim 1, wherein the connection circuit is formed of a bus bar or a single-core conductor, and is integrally embedded in the case body. 3. The harness structure for an engine-related part according to claim 1, wherein said connection circuit is formed of a flat cable, and is integrally fixed along an inner surface of said case body. 4. The harness structure for an engine-related part according to claim 1, wherein the electrical component includes at least one of an air flow meter and a throttle sensor.