JP2002285945A - Decorative cover device for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative cover device for engine, capable of reducing the influence of the engine heat and/or oil on the wirings for injectors and ignition coil devices. SOLUTION: A wiring structure 1 is configured with wirings 7 for a plurality of ignition coil devices 3 and a plurality of injectors 5 being mounted in the engine are incorporated therein, in an integrated condition. The decorative cover 10 is furnished with a plurality of mounting bosses 10a and a plurality of locking claws 12. By the use of these claws 12, a housing part 1a of the wiring structure 1 can be installed removably. The decorative cover 10 is removably installed on a cylinder head cover 11, in the condition that the connector part on each coil side of the housing part 1a be connected with each ignition coil device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design cover device for an engine mounted on a motor vehicle engine for cosmetic purposes.

[0002]

2. Description of the Related Art In recent years, electronic control of engine systems of automobiles and the like has been advanced, and in an ignition system and a fuel system of an engine, an ignition coil device (ignition coil integrated with an igniter) and an injector are provided corresponding to each combustion chamber. Various techniques are provided, each of which controls each ignition coil device and each injector by an engine control unit to control a fuel injection amount, an ignition timing, and the like in each combustion chamber.

[0003] As a wiring form for such a conventional ignition coil device in an engine room, each ignition coil device and each injector are attached to a corresponding position of a cylinder head cover of an engine, and each harness drawn out from an engine control unit. A structure in which the end is connected to each ignition coil device and each injector by a connector one by one has been adopted.

However, the end of each harness pulled out from the engine control unit in the engine room is connected to each ignition coil device mounted on the engine side by a connector, and the wiring harness for the engine is routed. However, there has been a problem that the assembling work becomes very complicated and the assembling workability is extremely poor.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 5-231174, a connector portion and a wiring conductor corresponding to a connection portion of each ignition coil device are provided on the back side of the cylinder head cover, respectively. There has been proposed an electrical wiring method which is excellent in assembling workability by enabling connection to each ignition coil device at a time by mounting on the device.

Also, as disclosed in Japanese Patent Application Laid-Open No. 9-317556, a wiring circuit for supplying power to various electronic components around the engine is incorporated in the cylinder head cover or mounted and fixed on the upper surface of the cylinder head cover. There has also been proposed a structure that simplifies the handling of the engine wire harness.

[0007] On the other hand, in order to enhance the design effect in the engine room, there has been introduced an engine in which a design cover for makeup is mounted over the cylinder head cover of the engine.

[0008]

However, according to the wiring structure disclosed in each of the above publications, the wiring is directly provided to the engine itself, so that the influence of heat and oil from the engine is great, There is a possibility that the wiring may be adversely affected.

In view of the above problems, an object of the present invention is to provide a design cover device for an engine in which the influence of heat and oil from the engine on the wiring to the injector and the ignition coil device is reduced. .

[0010]

A first technical means for solving the above problem is a design cover device for an engine in which a design cover is mounted so as to cover an upper side of a cylinder head cover of the engine. A power distribution structure in which respective wirings for the injector and the ignition coil device are integrated and assembled is detachably assembled to the design cover, and the design cover is detachably attached to the engine side.

A second technical means for solving the above problems is a design cover device for an engine having a design cover covering an upper side of a cylinder head cover of an engine. A power distribution structure in which respective wirings for the ignition coil device are integrated and assembled is integrally assembled with the design cover, and the design cover is detachably mounted on the engine side.

Further, the design cover includes an ignition coil device-side cover that covers an upper portion of a connection between the power distribution structure and the ignition coil device, and an injector side that covers an upper portion of a connection between the power distribution structure and the injector. A cover portion, the ignition coil device side cover portion is detachably mounted on the engine side, and the injector side cover portion is hingedly connected to the ignition coil side cover portion so as to retreat from above the connection portion with the injector. Alternatively, it may be configured to be detachably mounted.

[0013] Further, a connector portion connected to the ignition coil device is integrally provided on the lower surface side of the power distribution structure. When the connector portion is connected to the ignition coil device, the design cover is positioned with respect to the engine side. It may be configured to be arranged at the mounting position.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a power distribution structure having a substantially rectangular flat housing part 1a molded with heat-resistant resin or the like.
A control unit side connector portion 2 to which a connector at an end portion of a wire harness pulled out from an engine control unit (not shown) is detachably connected to one end portion in the longitudinal direction of “a”.

The lower surface of the housing 1a corresponds to a plurality of ignition coil devices 3 (in this embodiment, a four-cylinder engine) mounted in respective plug holes formed in the upper part of the engine. In addition, a plurality of coil-side connector portions 4 that are detachably connected are formed.

On one side of the housing portion 1a, a plurality of injector-side connector portions 6 respectively detachably connected to a plurality of injectors 5 for injecting and supplying fuel to the engine are provided in a plurality of extended shapes. It is arranged.

Then, from the control unit side connector section 2 to each coil side connector section 4 and each injector side connector section 6, wirings 7 composed of bus bars, covered wires and the like are integrated in the housing section 1a and incorporated by insert molding or the like. Have been.

For example, the wiring 7 reaching each coil side connector section 4 includes a wiring 7a for applying a primary voltage, a wiring 7b for grounding, a wiring 7c for outputting an ignition timing signal, and a wiring 7d for detecting an operation state. As the wiring 7 reaching each injector-side connector section 6, a wiring 7e for outputting an injection timing signal and a wiring 7f for grounding are provided.

Reference numeral 10 denotes a design cover which is mounted in a state where the upper side of the cylinder head cover 11 is covered with an appropriate space therebetween.
Made of heat-resistant resin such as polypropylene,
It is formed in an elongated rectangular shape substantially corresponding to the shape of the cylinder head cover 11.

At substantially four corner positions on the lower surface side of the design cover 10, mounting bosses 10a are provided, and a bolt insertion hole 10b is formed in each mounting boss 10a.

Further, on the lower surface side of the design cover 10, locking claws 12 for detachably locking the power distribution structure 1 and holding it at predetermined positions are projected downward at four positions. That is, each locking claw 12 has a locking claw portion 1 at the lower end portion facing inward to each other.
2a, when the power distribution structure 1 is pushed into and fitted between the locking claws 12 from below, the fitting structure is formed between the locking claws 12 via elastic deformation of the locking claws 12, Each locking claw 1
By the elastic return of 2, each locking claw portion 12a is locked on the lower surface side of the housing portion 1a, and the power distribution structure 1 is assembled and held on the design cover 10 here.

At this time, as shown by the imaginary line in FIG. 1, each locking claw 12 is locked on both sides of a pair of injector-side protrusions 1b protruding from one side of the housing 1a. The power distribution structure 1 can be effectively prevented from being displaced in the longitudinal direction.
0 It is held at a predetermined position on the lower surface side.

The present embodiment is configured as described above. When the power distribution structure 1 is mounted on the engine side by pushing the power distribution structure 1 into the lower surface side of the design cover 10 in advance, the locking claws 12 The power distribution structure 1 is held at a predetermined position.

When each coil side connector portion 4 of the power distribution structure 1 held by the design cover 10 is pressed correspondingly above each ignition coil device 3 mounted on the engine side, each coil side connector is pressed. Part 4 and each ignition coil device 3
Are collectively connected.

In this state, if the mounting bolts 14 are screwed into the respective boss portions 11a of the cylinder head cover 11 using the bolt insertion holes 10b of the design cover 10, the design cover 10 can be freely attached to and detached from the cylinder head cover 11. Complete installation.

Thereafter, each injector-side connector 6
May be connected to each injector 5 mounted on the delivery pipe 15 and arranged at a predetermined position. In addition,
If it is difficult to connect each injector-side connector 6 to each injector 5 after the design cover 10 is attached to the cylinder head cover 11, after connecting each injector-side connector 6 to each injector 5 in advance,
The design cover 10 may be attached to the cylinder head cover 11 as described above.

As described above, according to this embodiment, each ignition coil device 3 and each injector 5
And a wiring circuit for power supply to the power distribution structure 1 is incorporated in the power distribution structure 1 to simplify the wiring of the engine wire harness. It has the advantage that the connection can be made and the assembling workability is excellent.

Further, since the power distribution structure 1 is assembled on the design cover 10 side, a gap can be secured between the housing portion 1a and the design cover 10 of the power distribution structure 1 and the upper surface of the cylinder head cover 11. The cooling effect can be exerted by the flow of air passing between them, and the effect of heat and oil from the engine can be reduced compared to the case of mounting directly or closely to the engine side as in the conventional structure described above, There is an advantage that an adverse effect on the internal wiring 7 due to heat or oil can be effectively reduced.

Since the design cover 10 and the power distribution structure 1 are detachable, the locking of the locking claws 12 with respect to the housing portion 1a is released and only the design cover 10 is removed. The ignition timing can be checked while the engine is running at the time of maintenance, and there is an advantage that the maintainability is excellent.

Further, the power distribution structure 1 and the design cover 1
Compared with the method of individually attaching and fixing the design covers 10 individually to the cylinder head cover 11 side, it is only necessary to attach and fix only the design cover 10, and there is an advantage that the workability in attachment is excellent.

In the above-described embodiment, the structure in which the power distribution structure 1 is assembled using the locking claws 12 is shown. However, the housing 1a of the power distribution structure 1 is screwed to the design cover 10 by screws or the like. It is good also as a structure attached detachably.

FIGS. 4 and 5 show a second embodiment. Components similar to those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

That is, in the present embodiment, the design cover 10 includes the coil-side connector portions 4 and the ignition coil devices 3.
Ignition coil device side cover 20 covering the upper part of the connection
A wiring 7 extending from the injector-side overhanging portion 1b of the housing portion 1a, and an injector-side cover portion 21 covering an upper portion of a connection portion between each injector-side connector portion 6 and each injector 5; The housing 1a is integrally assembled to the lower surface of the device-side cover 20 by molding or the like.

Each mounting boss portion 10a is provided on the ignition coil device side cover portion 20, and the ignition coil device side cover portion 20 is detachably screwed to the boss portion 11a of the cylinder head cover 11 with the mounting bolt 14. The structure is to be.

The injector-side cover portion 21 is connected to and supported by one side edge of the ignition coil device-side cover portion 20 via a pair of hinge bodies 22. Usually, the injector-side cover portion 21 is positioned at the solid line position shown in FIG. Then, as shown by the phantom line, the hinge body 22 is configured to be rotatable upward around the hinge body 22 as shown by the phantom line.

The present embodiment is configured as described above, and when mounted on the engine side, as in the first embodiment, the power distribution structure is placed above each ignition coil device 3 mounted on the engine side. By pressing the respective coil-side connector portions 4 in a corresponding manner, a state in which the respective coil-side connector portions 4 and the respective ignition coil devices 3 are collectively connected is obtained.

In this state, each bolt insertion hole 10
b, the mounting bolt 14 is screwed into the boss portion 11a.
Is completed.

Thereafter, each injector side connector 6
May be connected to each injector 5 mounted on the delivery pipe 15 and arranged at a predetermined position.

Therefore, similarly to the first embodiment, there are advantages in that the wiring harness for the engine can be simplified and workability in assembling the ignition coil devices 3 is excellent.

Further, since the power distribution structure 1 is integrally assembled to the design cover 10, the cooling effect of the power distribution structure 1 due to the flow of air passing through the gap between the design cover 10 and the upper surface of the cylinder head cover 11 is provided. , The effect of heat or oil from the engine can be reduced, and the adverse effect of heat or oil on the internal wiring 7 can be reduced.

Further, since the injector-side cover 21 is hinged to the ignition coil device-side cover 20 so as to be rotatable upward, the injector-side cover 21 is turned upward and retracted. Thus, there is an advantage that the ignition timing can be adjusted and the maintenance performance is excellent.

The power distribution structure 1 and the design cover 10
As compared with a method in which the design covers 10 are individually attached and fixed to the cylinder head cover 11 side, it is only necessary to attach and fix only the design cover 10, and there is an advantage that the attachment workability is excellent.

The injector-side cover 21 is connected to the ignition coil device-side cover 20 via a hinge body 22 so as to be rotatable upward. Injector side cover 21
May be detachably mounted by a screw fastening or locking structure or the like.

FIGS. 6 and 7 show a third embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

That is, in the present embodiment, the design cover 10 is configured to cover only the upper part of the connection between each coil side connector portion 4 and each ignition coil device 3, and the housing portion 1a is provided on the lower surface side of the design cover 10. Are integrally assembled by molding or the like.

The present embodiment is configured as described above, and when mounted on the engine side, similarly to the first embodiment, the power distribution structure is placed above each ignition coil device 3 mounted on the engine side. By pressing the respective coil-side connector portions 4 in a corresponding manner, a state in which the respective coil-side connector portions 4 and the respective ignition coil devices 3 are collectively connected is obtained.

In this state, each bolt insertion hole 10
b, the mounting bolt 14 is screwed into the boss portion 11a.
Is completed.

Thereafter, each injector-side connector 6
May be connected to each injector 5 mounted on the delivery pipe 15 and arranged at a predetermined position.

Therefore, as in the first embodiment, there are advantages in that the wiring harness for the engine is simplified and workability in assembling the ignition coil devices 3 is excellent. The cooling effect of the power distribution structure 1 can be exerted by the flow of air passing through the gap between the design cover 10 and the upper surface of the cylinder head cover 11, and the effect of heat and oil from the engine is reduced. This has the advantage that adverse effects on the internal wiring 7 due to heat or oil can be reduced.

Further, since the injector 5 side is open, ignition timing adjustment and the like can be easily performed, and there is an advantage that maintenance is excellent.

Further, the power distribution structure 1 and the design cover 1
Compared with the method of individually attaching and fixing the design covers 10 individually to the cylinder head cover 11 side, it is only necessary to attach and fix only the design cover 10, and there is an advantage that the workability in attachment is excellent.

In each of the above embodiments, a four-cylinder engine system is disclosed. However, the coil-side connector part 4 and the injector-side connector part 6 may be appropriately increased or decreased according to the number of cylinders of the engine.

Also, a structure in which the design cover 10 is formed in an elongated rectangular shape is disclosed.
May be changed as appropriate according to the shape of.

[0054]

As described above, according to the design cover device for the engine of the present invention, the power distribution structure in which the respective wirings for the injector and the ignition coil device mounted on the engine are integrated and incorporated is provided. The design cover is removably mounted on the engine side, and the design cover is only attached to the cylinder head cover separately from the power distribution structure and the design cover. It is only necessary to attach and fix it, and it is excellent in workability, and a gap can be secured between the power distribution structure and the design cover and the upper surface of the cylinder head cover, and the cooling effect can be exhibited by the flow of air passing between them , Directly on the engine side,
Alternatively, as compared with the case of mounting in close contact, there is an advantage that the influence of heat or oil from the engine can be reduced, and the adverse effect of heat or oil on each internal wiring can be effectively reduced.

Further, a power distribution structure in which respective wirings for the injector and the ignition coil device mounted on the engine are integrated and assembled is integrally assembled with the design cover, and the design cover is detachably mounted on the engine side. As described above, this structure also has the advantage of improving the mounting workability and reducing the adverse effects of heat and oil on the internal wiring.

Further, the design cover includes an ignition coil device-side cover that covers above a connection portion between the power distribution structure and the ignition coil device, and an injector-side cover portion that covers above a connection portion between the power distribution structure and the injector. The ignition coil device side cover is detachably mounted on the engine side, and the injector side cover is retracted from the upper part of the connection with the injector to the ignition coil side cover,
If the structure is hinged or detachably mounted, there is an advantage that maintenance can be improved.

Further, a connector portion connected to the ignition coil device is integrally provided on the lower surface side of the power distribution structure, and in a state where the connector portion and the ignition coil device are connected, the design cover is placed at a mounting position with respect to the engine side. With the arrangement, there is an advantage that the assembling workability can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a power distribution structure according to a first embodiment of the present invention.

FIG. 2 is a plan view of a design cover.

FIG. 3 is a sectional side view showing an assembled state.

FIG. 4 is a plan view of a design cover according to a second embodiment.

FIG. 5 is a sectional side view showing the assembled state.

FIG. 6 is a plan view of a design cover according to a third embodiment.

FIG. 7 is a sectional side view showing the assembled state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distribution structure 2 Control unit side connector part 3 Ignition coil device 4 Coil side connector part 5 Injector 6 Injector side connector part 7 Wiring 10 Design cover 11 Cylinder head cover 12 Locking claw 14 Mounting bolt 15 Delivery pipe 20 Ignition coil device side cover Part 21 Injector side cover part 22 Hinge body

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazushige Nakamura 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Inside the Auto Network Engineering Laboratory Co., Ltd. (72) Inventor Takao Nozaki 1 Kikuzumi, Minami-ku, Nagoya-shi, Aichi 7-10, Auto Network Technology Laboratory Co., Ltd. (72) Inventor Takamitsu Miyamui 1-7-10, Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Auto Network Technology Laboratory Co., Ltd. 3G019 KC07 KC09 KC10 3G024 AA71 GA26

Claims (4)

[Claims] 1. A design cover device for an engine in which a design cover is mounted so as to cover an upper side of a cylinder head cover of the engine, wherein a power distribution structure in which respective wires for an injector and an ignition coil device mounted on the engine are integrated and incorporated. A design cover device for an engine, wherein a body is detachably attached to the design cover, and the design cover is detachably attached to an engine side. 2. A design cover device for an engine in which a design cover is mounted so as to cover an upper side of a cylinder head cover of the engine, wherein a power distribution structure in which respective wires for an injector and an ignition coil device mounted on the engine are integrated and incorporated. A design cover device for an engine, wherein a body is integrally attached to the design cover, and the design cover is detachably attached to an engine side. 3. The design cover includes an ignition coil device-side cover that covers above a connection portion between the power distribution structure and the ignition coil device, and an injector side that covers above a connection portion between the power distribution structure and the injector. A cover portion, the ignition coil device side cover portion is detachably mounted on the engine side, and the injector side cover portion is hingedly connected to the ignition coil side cover portion so as to retreat from above the connection portion with the injector. 3. The design cover device for an engine according to claim 2, wherein the design cover device is detachably mounted. 4. A connector portion connected to the ignition coil device is integrally provided on a lower surface side of the power distribution structure, and the design cover is attached to the engine side when the connector portion is connected to the ignition coil device. 4. The design cover device for an engine according to claim 1, wherein the design cover device is disposed at a mounting position.