JPH0761293A - Fitting structure of electronic control unit for engine - Google Patents

Abstract

PURPOSE:To provide electronic control unit fitting structure suited to reduce the cost of parts and to improve assembling work performance. CONSTITUTION:Two places in a cowl box 3 partitioning the vehicle interior 1 from an engine room 2 are closed by partition walls 4a, 4a, and a space between these partition walls 4a, 4a is made into a waterproofed section part 4 for accommodating an ECU for an engine. The cowl box 3 is formed of a windshield lower 5, a dash board upper 6 on the lower side, and a front face part 7. The front face part 7 of the water-proofed section part 4 closes a space to the dash board upper 6 and has an opening 7a. The windshield lower 5 and the dash board upper 6 also have openings 5b, 5c and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an electronic control unit for an engine, and more particularly to a mounting structure for an electronic control unit for an engine, which is suitable for reducing parts cost and improving workability in assembling.

[0002]

2. Description of the Related Art FIG. 15 is a plan view of an engine section showing a conventional arrangement of an engine and its electronic control unit (abbreviated as "ECU").

In FIG. 1A, the ECU 51 is arranged at the foot of the assistant seat (the back of the carpet), the harness 52 on the body side is extended to the vicinity of the engine 53, and the waterproof connector 54 is provided.
It is an example in which it is connected to the engine harness 55 by. In the same figure (B), the ECU 51 is arranged in the tunnel section of the vehicle center line, and the engine harness 55 is directly passed from the engine 53 to the ECU 51 by penetrating the dashboard lower 58 that defines the engine room 56 and the vehicle room 57. This is an example of connection. In the same figure (C), a waterproof ECU 51a is arranged in the vehicle center line portion of the windshield lower 58, and the engine harness 55 is connected to the ECU by a waterproof connector 54.
This is an example of direct connection to 51a.

Thus, the engine control ECU is
It is installed in the engine room or in the passenger compartment near it, and when it is installed in the engine room, waterproof specifications are required including the connector for connecting to the engine harness. When it is installed in the passenger compartment, the passenger compartment and engine room It is required to pierce a dashboard defining the engine harness and an engine harness or a body side harness for welcoming the engine harness.

[0005]

However, the above-mentioned waterproof ECU and connector cannot avoid an increase in cost due to the waterproof structure, and when the ECU is installed in the vehicle compartment, the ECU and connector cannot be removed from the engine room. It is necessary to ensure the waterproofness of the entire dashboard that defines the passenger compartment, and a difficult posture is required when assembling the wire harness through the dashboard in the narrow passenger compartment. It is difficult to avoid the difficulty in the work of assembly and maintenance of parts such as ECU.

An object of the present invention is to obtain an engine ECU mounting structure suitable for reducing the cost of parts and improving workability.

[0007]

In order to solve the above problems, a cowl box composed of a windshield lower and a dashboard upper and a dashboard lower that closes the cowl box are defined in front of a vehicle compartment. In an automobile provided with an engine room and an electronic control unit for controlling the engine, in a cowl box of the automobile, a waterproof partition section defined by a partition wall for preventing water from entering from the outside of the vehicle compartment is provided. The engine electronic control unit was attached to the waterproof compartment.

The waterproof compartment in the cowl box has an opening on the engine room side, and the opening is equipped with a waterproof lid.

[0009]

According to the invention, since the partition wall that defines the waterproof partition portion according to the mounting structure of the electronic control unit for an engine is configured as a body structure together with the cowl box, the waterproof partition portion that forms the waterproof chamber can be easily formed. As the engine electronic control unit housed therein, a non-waterproof type unit having a simple configuration can be applied.

The electronic parts such as the electronic control unit attached to the waterproof partition portion according to the mounting structure of the electronic control unit for an engine according to claim 2 can be passed through the opening of the waterproof partition portion from the engine room side without performing work in a narrow vehicle compartment. It is assembled by the work of.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of a cowl box portion according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

Two places inside the cowl box 3 which define the space between the vehicle compartment 1 and the engine room 2 are closed by partition walls 4a, 4a to prevent water from entering from the outside of the vehicle compartment between these partition walls 4a, 4a. The waterproof partition 4 is used to house the engine ECU. In addition, a partition wall 4 is provided near the end of the cowl box 3.
If a is provided, the side wall 4b can be used to form a waterproof partition portion on the pillar side portion.

As shown in detail in FIG. 2, the cowl box 3 is composed of a windshield lower 5 in contact with the lower edge of the windshield 5a, a dashboard upper 6 below the windshield lower 5, and a front portion 7 for taking in outside air. The waterproof partition part 4 is defined by a partition wall 4 a in the cowl box 3.

A lower portion of the dashboard upper 6 is closed by a dashboard lower 8 to define a vehicle compartment 1 and an engine room 2 in front of the dashboard lower portion. The part 8 defines the engine room 2.

As shown in FIG. 1A, the front portion 7 of the waterproof partition portion 4 is provided with an opening 7a which closes the space between the front portion 7 and the dashboard upper 6, and also the windshield lower 5 and the dashboard upper 6. The openings 5b, 5c, 6a, 6b are provided.

FIG. 1B shows a modified example of the cowl box portion shown in FIG. The front part 7 closes the space between the dashboard upper front part 8 and the dashboard upper front part 8 to define the engine room 2 and the waterproof partition part 4,
A waterproof partition portion having an opening 8a in the dashboard upper front portion 8 is formed.

FIG. 3 is another structural example of the cowl box portion according to the present invention, and FIG. 4 is a sectional view taken along line IV-IV of FIG. A part of the cross section of the cowl box is made into a waterproof partition section 4 by an integral partition wall 4c which is in contact with the dashboard upper 6 and the dashboard upper front portion 8 and covers the other four surfaces.

The integral partition wall 4c is provided with a flange 4d on its periphery, and is watertightly processed by welding the flange 4d and a sealing material. The dashboard upper front portion 8 is provided with an opening 8a facing the engine room 2, and the dashboard upper 6 is provided with an opening 6a facing the vehicle compartment 1. The integral partition wall 4c can be extended to between both pillars of the vehicle body to form a waterproof partition portion 4 extending over the entire length of the cowl box 3 in the vehicle width direction.

FIG. 5 shows a modified example of the cowl box portion of FIG. 4, which is in contact with the windshield lower 5 and the front surface portion 6 and covers the other four surfaces by an integral partition wall 4e.
A part of the cross section is used as the waterproof partition 4. The front portion 7 has an opening 7a facing the engine compartment 2, and the windshield lower 5 has an opening 5b facing the passenger compartment 1. The integral partition wall 4d can also be configured to extend between both pillars of the vehicle body as in the third configuration example.

FIG. 6 is a perspective view showing a mounting configuration example of the cowl box portion, FIG. 7 is a mounting exploded perspective view of electrical components, FIG. 8 is a plan view showing the same mounting configuration example, and FIG. 9 is IX-IX of FIG. It is a line sectional view.

In the cowl box 3 shown in FIG. 6, a partition wall 4a is provided on the pillar side portion of the cowl box 3 to form a waterproof partition portion 4, and an opening is formed in a front surface portion 7 that closes between the windshield lower 5 and the dashboard upper 6. 7a and a notch 8b in the front part 8 of the dashboard upper part. Reference numeral 5b is an opening of the windshield lower 5.

As shown in FIG. 7, the engine ECU 10 is attached to the waterproof partition 4 by means of stud bolts 4f, 4f in the opening 7a and a receiver 4g at the rear of the waterproof partition 4, and the engine harness 11 is connected to the connector. 11
A steel lid member 12, which is connected from the opening 7a side via a and is screwed, further watertightly closes the opening 7a via a waterproof member 12a. 10a is a vibration isolator.

The engine ECU 10 can be attached from the opening 7a of the front surface portion 7 of the waterproof compartment 4 to the internal receptacle 4g. The engine harness 11 connected to the engine ECU 10 is the dashboard upper part of FIG. The grommet 8c attached to the notch 8b of the front portion 8 penetrates to reach an engine (not shown) in the engine room 2.

Since the mounting work of the engine ECU 10 including the mounting of the engine harness 11 can be easily performed by tightening the screws from the engine room 2 side, the mounting structure of the engine ECU according to the present invention is as follows. It is possible to avoid the difficult mounting work that cannot be avoided when the electrical components are arranged at the lower part of the dashboard, and it is possible to improve workability and maintenance quality including maintenance work.

Further, since the waterproof property is ensured by the waterproof partition portion 4 and the waterproof lid 12 formed inside the cowl box, the ECU 10 for the engine and the connector 11a do not need to have a high cost waterproof specification, and the parts It is possible to reduce the cost.

FIG. 10 is a perspective view showing another mounting structure example of the cowl box portion, FIG. 11 is an exploded perspective view showing the details of the same structure, FIG. 12 is a plan view showing the mounting structure example, and FIG. 13 is FIG. FIG. 13 is a sectional view taken along line XIII-XIII of FIG.

The cowl box 3 shown in FIG. 10 is provided with an integral partition wall 4e in contact with the windshield lower 5 and the front face portion 7 to partition the upper half of the cowl box cross section, and the windshield lower 5 has an opening 5b on the passenger compartment side. The front portion 7 is provided with an outer opening 7a.

As shown in FIG. 11, the integral partition wall 4e is substantially U-shaped, and the flange 4d at the periphery thereof is welded to the windshield lower 5 and the front surface portion 7 of the cowl box 3 to form the waterproof partition portion 4. To do.

As shown in FIG. 12, the waterproof compartment 4 is provided with the ECU 10 for the engine and the harness 11 for the passenger compartment.
The vehicle interior harness 11b accommodates the vehicle interior side opening 5b.
It is connected to the instrument panel harness 11d extending from b to the instrument panel (not shown) via the connector 11c.

The waterproof partition 4 is a harness 1 for instrument panel.
A watertightness is secured by the waterproof lid 12 and a pulling-in operation can be simplified by the vehicle-cabin-side opening 5b.

FIG. 14 is a sectional view of the cowl box portion showing an example of connecting the wire harness.

The waterproof compartment 4 shown in FIG. 1A, which is formed in the cowl box portion, has a vehicle compartment side opening 5b at the rear end side of the upper surface thereof, and the cowl box portion is covered in the vicinity of the vehicle compartment side opening 5b. A panel positioning portion 14 which forms a connecting member with the instrument panel 13 and a standby connector 15
It has a one-touch coupling structure. The panel positioning portion 14 is located outside the opening 5b of the waterproof partition portion 4, and the standby connector 15 is located inside the opening 5b.

The waterproof partition section 4 side member of the connector 15 is a fixed side and is provided with a fitting guide, and the waterproof cover 1 of the front section 7 is provided.
Vehicle harness 1 separated from engine harness 11 from 2
1b connects. A member of the connector 15 on the instrument panel 13 side is fixed to the tip of an arm 13a formed in the vicinity of the panel side member of the panel positioning portion 14 facing the cowl box 3 and is instrumented by the panel positioning portion 14. When the panel 15 is fixed in place, the arm 13a enters into the waterproof partition 4 through the opening 5b and fits on the fixed side of the connector 15 to be connected to the vehicle interior harness 11b.

The standby connector 15 provided in the waterproof compartment 4 can be arranged closer to the panel positioning portion 14 than when it is provided below the cowl box 3 (connector 9a shown in phantom). Therefore, the assembling property of the one-touch coupling can be improved.

The front part 7 is provided in the waterproof partition part 4 of FIG.
In addition to the outer opening 7a, the vehicle compartment side opening 6a is provided on the lower side thereof. The outside opening 7a and the passenger compartment side opening 6a are used as lead-in openings into the passenger compartment, and the passenger compartment harness 11b and the passenger compartment side harness 11d are connected by the connector 11c.

The above-mentioned harness connection work inside and outside the vehicle compartment, including the screwing operation of the waterproof lid 12 for ensuring waterproofness, should be easily performed from the engine room 2 side by the outer opening 7a and the vehicle compartment side opening 6a. You can As a result, it is possible to avoid the difficult work in the narrow space below the cowl box 3 when the grommet 9b shown by an imaginary line is provided in the dashboard lower 9 and the harness is pulled into the vehicle compartment, which is conventionally done.

[0038]

As described above, the cowl box of an automobile including the engine room defined by the cowl box and the dashboard lower in front of the passenger compartment and the electronic control unit for controlling the engine. The mounting structure of the electronic control unit for an engine according to claim 1 is configured by providing a partition wall inside to form a waterproof partition part, and by mounting the electronic control unit for the engine therein, the waterproof partition part is a cowl box. At the same time, it can be easily formed as a body structure, and as the electronic control unit for the engine housed therein, a non-waterproof type having a simple structure can be applied, and the cost of electrical components can be reduced.

Since the opening is formed on the engine compartment side of the waterproof partition and the opening is provided with the waterproof lid, the mounting structure for the electronic control unit for the engine according to claim 2 is configured.
Electrical components such as an electronic control unit attached to the waterproof partition can be assembled by working from the engine room side through the opening of the waterproof partition without working in a narrow vehicle compartment.

Therefore, the mounting structure of the electronic control unit for an engine according to the second aspect avoids difficult work in a narrow vehicle compartment, and improves workability during assembly and maintenance.

[Brief description of drawings]

FIG. 1 is a plan view of a cowl box portion according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is another configuration example of the cowl box portion according to the present invention.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a modification example of the cowl box portion of FIG.

FIG. 6 is a perspective view showing a mounting configuration example of a cowl box portion.

FIG. 7 is an exploded perspective view of the mounting of electrical components.

FIG. 8 is a plan view showing the same mounting configuration example.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a perspective view showing another mounting configuration example of the cowl box portion.

FIG. 11 is an exploded perspective view showing details of the configuration.

FIG. 12 is a plan view showing the same mounting configuration example.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a cross-sectional view of a cowl box portion showing a connection example of a wire harness.

FIG. 15 is a plan view of the engine section showing the conventional arrangement of the engine and its electronic control unit.

[Explanation of symbols]

1 ... vehicle compartment, 2 ... engine room, 3 ... cowl box,
4 ... waterproof partition, 4a ... partition, 4c ... partition, 4e ... partition, 5 ... windshield lower, 5b ... opening, 5c ... opening, 6 ... dashboard upper, 6a ... opening, 6b ... opening, 7 ... front part , 7a ... Opening, 8 ... Dashboard upper front part, 8a ... Opening, 9 ... Dashboard lower, 10
... Engine ECU, 11 ... Engine harness, 12 ...
Lid member

Claims (2)

[Claims] 1. An engine room defined in front of a vehicle compartment by a cowl box composed of a windshield lower and a dashboard upper and a dashboard lower closing the lower part, and an electronic control unit for controlling the engine. In a vehicle equipped with, a waterproof compartment defined by a partition for preventing water from entering from outside the vehicle is provided in the cowl box of the vehicle, and the engine electronic control unit is attached to the waterproof compartment. A mounting structure for an electronic control unit for an engine characterized by: 2. The waterproof partition within the cowl box comprises:
2. The electronic control unit mounting structure for an engine according to claim 1, wherein an opening is formed on the engine room side, and the opening is provided with a waterproof lid.