JP2002057473A - Mounting structure of electronic control unit for vehicle - Google Patents

Abstract

(57) [Problem] To provide a mounting structure of a control unit for a vehicle, in which a harness wired in an engine chamber is reduced to improve mounting performance and operation reliability and to reduce cost. . SOLUTION: A first housing 1 in which a part or all of constituent members of an air cleaner 2, a communication passage 3, a surge tank 4, and an intake duct 5 is integrally formed by resin formation.
1 is provided with a substrate storage unit 20 and an engine control unit 50 is provided.
The first control unit board 51 is stored and held, and the first
The electrical components such as the electronically controlled throttle valve 16 and the injector 17 mounted on the housing 11 are connected to the control unit board 51 via the harness 24 embedded in the first housing 11, so that the engine housing is complicated. Reduce the number of harnesses wired to

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a vehicle electronic control unit mounted on a resin component in an engine chamber.

[0002]

2. Description of the Related Art Conventionally, a vehicle electronic control unit has
Generally, it is mounted in a vehicle interior. For example, an engine control unit that controls the fuel injection amount, ignition timing, and the like of an engine is generally disposed inside a vehicle interior front panel or on a floor below a seat. However, when the electronic control unit is disposed in the vehicle interior, the distance between the electronic control unit and various electrical components such as sensors and actuators disposed in the engine chamber becomes longer, and the harness for wiring these components becomes longer and more complicated. Especially in recent years, in the engine control unit, wiring for realizing functions such as output performance improvement, fuel efficiency improvement, exhaust gas reduction and operation reliability improvement has been multiplexed, and the number of wirings has been greatly increased. This tendency is remarkable.

In response to this, for example, Japanese Patent Laid-Open No. 11-101
Japanese Patent No. 164 discloses a technique in which an electronic control unit is mounted in the engine chamber by mounting the electronic control unit main body on the back side of the air cleaner cap.

[0004]

However, in the above prior art, it is possible to shorten the harness to some extent by disposing the electronic control unit in the engine chamber, but it is necessary to arrange the electronic control unit such as various sensors and actuators. The connection to the product is still done through a large amount of harness wired inside the engine chamber, and these are reduced even a little, further improving the attachment, operating reliability, and cost. It is desired to aim at.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of the above circumstances, and has been made in consideration of the above problem. An object of the present invention is to provide a unit mounting structure.

[0006]

According to a first aspect of the present invention, there is provided a vehicle electronic control unit mounting structure in which at least one of electrical components connected to the electronic control unit is mounted. A mounting structure of an electronic control unit for a vehicle, in which a board housing portion is provided in a resin member in the engine chamber, and a control unit board of the electronic control unit is housed in the board housing portion. A lid fixed to the unit substrate and closing the opening of the substrate storage portion; and a lid disposed on the back side of the lid and embedded in the resin member when the lid closes the opening. A connector connectable to the harness, wherein at least the electrical component mounted on the resin member and the control unit board are connected via the connector. .

That is, in the mounting structure of the electronic control unit for a vehicle according to the first aspect of the present invention, the control unit substrate is stored in the substrate storing portion provided in the resin member, and the cover is fixed to the control unit substrate. When closing the opening of the substrate storage section, a connector provided on the back surface of the lid is connected to a harness buried inside the resin member, and at least the electrical component mounted on the resin member and the control By performing connection with the unit board via the connector, the harness wired in the engine chamber is reduced, thereby improving the mountability and operational reliability and reducing the cost.

According to a second aspect of the present invention, there is provided a vehicle electronic control unit mounting structure according to the first aspect, wherein the resin member is a component of a plurality of intake system components constituting an intake system of an engine. It is characterized in that it is a member formed integrally or partially.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The drawings relate to an embodiment of the present invention. FIG. 1 is an exploded cross-sectional view of a main part of an intake device and an electronic control unit, FIG. 2 is a perspective view of an electronic control unit, and FIG. FIG. 4 is a cross-sectional view of a main part showing a state in which the electronic control unit is attached to the intake device. FIG.
6 is a cross-sectional view of a main part viewed from the direction V, FIG. 6 is a cross-sectional view of a main part near an injector mounting part, and FIG.

In FIG. 3, reference numeral 1 denotes an intake device for an engine in which a plurality of intake system components are integrated. That is, the intake device 1 includes a surge tank 4 that communicates with the air cleaner 2 via the communication passage 3 on the downstream side of the air cleaner 2.
And an intake duct 5 communicating with the downstream side of the surge tank 4
And the main part is configured.

The air cleaner 2 includes a first member made of a resin member.
An air cleaner element 1 made of nonwoven fabric or filter paper is provided inside an air cleaner case 10 mainly constituted by attaching an air cleaner cap 12 to a housing 11.
3 are held to form a main part.

The first housing 11 extends downstream of the air cleaner 2, and the communication passage 3 is formed integrally with the air cleaner 2 by the extension 11 a of the first housing 11. The first housing 11 is further extended downstream of the communication path 3, and the first housing 1
The second housing 15 made of a resin member is attached to the first extended portion 11b, and the surge tank 4 and the intake duct 5
Are formed.

The first housing 11 is equipped with a solenoid actuator 16a of an electronically controlled throttle valve 16, a throttle sensor 16b, an injector 17 and the like as electrical components. That is, as shown in the drawing, the electronically controlled throttle valve 16 is disposed in the middle of the communication passage 3, and the injector 17 is disposed downstream of the intake duct 5.

Here, the air cleaner case 10 is provided downstream of the air cleaner element 13 with a board housing section 20 for housing a control unit board 51 constituting an engine control unit 50 as an electronic control unit to be described later. Have been. The substrate storage section 20 is provided with a first
And one end is formed in a substantially box-shaped hole opened outside the air cleaner case 10. A seal groove 20b is provided around the periphery of the opening 20a of the substrate accommodating portion 20.
0b is provided with a bolt hole 20c. Also,
A support groove 20 d for supporting the control unit substrate 51 is provided at the bottom of the substrate storage unit 20.

The first housing 11 has a second connector as a connector provided in the engine control unit 50.
The internal connector 22 to which the connector 67 (to be described later) is detachably connected is provided adjacent to the board storage unit 20. A seal groove 22 a is provided around the inner connector 22, and the seal groove 22 a communicates with a seal groove 20 b provided around the substrate housing section 20.

A plurality of terminals 23 are provided inside the internal connector 22. One end of a harness 24 embedded in the first housing 11 is connected to the terminals 23 as shown in FIGS. ing. The harness 24 is integrally cast into a wall when the first housing 11 is manufactured. The other end of the harness 24 is an electric component mounted on the first housing 11 such as the electronic control throttle valve 16 and the injector 17. Connected to the product.

Here, the connection between the harness 24 and the electrical components will be described using the injector 17 as an example. Figures 6 and 7
As shown in FIG. 5, the mounting surface 30 of the injector 17 formed in the first housing 11 has an injection hole insertion hole 31 into which the injection hole 17a of the injector 17 can be mounted, and the positioning of the injector 17 in the fuel injection direction. A bolt hole 34 for performing the operation and a connector 33 are provided. A bolt hole 34 is provided inside the connector 33, and a plurality of terminals 35 to which the other end of the harness 24 is connected (not shown) inside the first housing 11 are arranged on both sides of the bolt hole 34. Has been established. Also, the bolt hole 34 and the terminal 3
5 are provided with a seal groove 36 surrounding them.

On the other hand, the injector 17 has a connector 3
The connector 37 detachably connected to the nozzle 3 is the injection port 17a.
The connector 37 has a bolt hole 3
4 and a terminal (not shown) corresponding to the terminal 35 is provided.

The injection port 17a is connected to the injection port insertion hole 31.
When the injector 17 is attached to the first housing 11 by being inserted into the first housing 11 and positioned by the bolt holes 34, the connectors 33 and 37 are connected, whereby the injector 17 is electrically connected to the harness 24. . Here, the connection between the connectors 33 and 37 is performed in a liquid-tight manner via a seal member 39 mounted in the seal groove 36. Further, the injector 40 is inserted by a bolt 40 inserted into the bolt insertion hole 38 and screwed into the bolt hole 34.
7 is firmly fixed to the first housing 11.

Similarly, the first housing 11 is provided with a connector (not shown) at an attachment portion of the electronic control throttle valve 16, and the electronic control throttle valve 16 is electrically connected to the harness 24 via this connector. It is connected to the.

Next, the engine control unit 50 attached to the intake device 1 having the above configuration will be described. As shown in the figure, the engine control unit 50 includes a control unit board 51. The control unit board 51 is, for example, a board body 5 composed of a four-layer printed board.
2 and a plurality of electronic elements 53 disposed on the substrate main body 52, and the substrate main body 52 on which the electronic elements 53 are disposed.
An aluminum plate 54 having a function of reinforcing the substrate main body 52 and dissipating heat is attached to both surfaces of the substrate to constitute a main part. Here, the aluminum plate 54 has a plurality of bent portions, thereby improving strength and heat dissipation. Instead of the aluminum plate 54, plated steel plates or the like may be attached to both sides of the substrate main body 52, or both sides of the substrate main body 52 may be solidified with a gel substance or an epoxy material.

The control unit board 51 is inserted and held in the board storage section 20 provided in the first housing 11. One end (insertion side) of the control unit board 51 is A cushion material 55 corresponding to the support groove 20d is provided.

On the other hand, a lid body 60 for closing the opening 20a when the control unit substrate 51 is stored in the substrate storage section 20 is fixedly provided on the other end side of the control unit substrate 51.

A first connector 61 is provided on the outer surface side (the other end side) of the lid 60, and a plurality of terminals 62 connected to the substrate main body 52 are provided inside the first connector 61. ing. The first connector 61 is connected to the external connector 6.
3 (see FIG. 1). When an external connector 63 is connected to the first connector 61,
Electrical components (not shown) related to engine control other than the electrical components mounted on the housing 11 are connected to the terminal 62 via the harness 64 to enable transmission and reception of signals to and from the control unit board 51. In addition, a bolt 65 is inserted into and supported by the first connector 61 at a position corresponding to the bolt hole 20c.

On the inner surface side (one end side) of the lid body 60 where the first housing 11 is opposed, a second detachable internal connector 22 provided on the first housing 11 is provided.
Connector 67 is provided. Second connector 67
Is provided with a terminal 68 connectable to the terminal 23 disposed on the internal connector 22. When the second connector 67 is connected to the internal connector 22, the electronic control throttle valve 16, the injector 17, and the like are provided. First housing 1
1 is connected to the terminal 68 via the harness 24.
To enable transmission and reception of signals to and from the control unit board 51.

In FIG. 1, reference numeral 69 denotes a sealing material.
An integrated structure corresponding to the seal groove 20b and the seal groove 22a is formed.

Next, the operation of attaching the engine control unit 50 to the intake device 1 will be described. As shown in FIGS. 4 and 5, the operator inserts the control unit board 51 into the board storage unit 20 from one end side after arranging the seal material 69 in the seal grooves 20 b and 22 a. And the control unit 5
The cushioning material 55 provided at one end of the
d, and after the second connector 67 is connected to the internal connector 22, the bolt 65 is fastened to the bolt hole 20c.

As a result, the sealing member 69 is pressed between the first housing 11 and the lid 60, and the control unit substrate 51 is stored in the substrate storage portion 20 in a liquid-tight manner.
The terminal 23 is connected to the terminal 68 to establish a connection between electrical components such as the electronically controlled throttle valve 16 and the injector 17 and the control unit board 51.

After that, the operator connects the external connector 63 to the first connector 61, and connects the control unit board 51 with the electrical components related to engine control other than the electrical components mounted on the first housing 11. After making the connection, the installation work is completed.

In such an embodiment, the board housing portion 20 is provided in the first housing 11 formed of resin to house and hold the control unit board 51 of the engine control unit 50, and is mounted on the first housing 11. The electrical components such as the electronically controlled throttle valve 16 and the injector 17 are connected to the control unit board 51 via the harness 24 embedded in the first housing 11, so that a harness that is complicatedly wired in the engine chamber. Can be reduced, and the mountability of the engine control unit 50 can be improved.

Connecting the engine control unit 50 to the electronic control throttle valve 16, the injector 17, and the like via the harness 24 embedded in the first housing 11 makes it possible to connect these to the outside of the intake device 1. The wire length can be reduced as compared with the case where the connection is made via a wired harness, and the manufacturing cost can be reduced.

The harness 24 is connected to the first housing 1.
By burying in the inside 1, the possibility of disconnection or the like of the harness 24 can be greatly reduced, and the reliability of the electronically controlled throttle valve 16 and the injector 17 can be improved.

A second connector 67 is provided on the back side of the lid 60 for closing the opening 20a, and is opposed to the internal connector 22 provided in the first housing 11, so that the opening 20a is closed. And the connection between the second connector 67 and the internal connector 22 can be performed simultaneously.

Further, by providing a connector to which the other end of the harness 24 is connected to the electrical component mounting portion of the first housing 11, the harness 2 is mounted simultaneously with the mounting of the electrical component.
4 can be connected to electrical components. Therefore, the connection work between the engine control unit 50 and the electrical components can be simplified, and a wiring error can be prevented. Specifically, for example, by providing a connector 33 to which the other end of the harness 24 is connected to the mounting surface 30 of the injector 17 in the first housing 11, the connection between the harness 24 and the injector 17 is performed simultaneously with the mounting of the injector 17. Can be performed, the connection work between the engine control unit 50 and the injector 17 can be simplified, and a wiring error can be prevented.

The first housing 11 is formed by integrating components constituting the intake system components such as the air cleaner 2, the communication passage 3, the surge tank 4, and the intake duct 5, and the electronic control throttle valve 16 and the injector 17 are formed. By mounting such electrical components on the first housing 11 side, a plurality of electrical components can be connected to the engine control unit 50 via the harness 24 embedded in the first housing 11.

By arranging the substrate storage section 20 in the air cleaner case 10, the problem of the mounting space in the engine chamber can be solved, and the control can be performed without adding a special cooling device or the like. The unit substrate 51 can be cooled.

Further, by supporting one end side of the control unit substrate 51 in the substrate storage section 20 via the cushion member 55, manufacturing errors of the control unit substrate 51, the substrate storage section 20, and the like can be absorbed. . At the same time, the transmission of vibrations to the control unit substrate 51 during traveling of the vehicle or the like can be suppressed by the cushion material 55.

By interposing a seal member 69 between the first housing 11 and the lid 60, the control unit board 51 can be stored in the board storage section 20 in a liquid-tight manner. At the same time, the connection between the second connector 67 and the internal connector 22 can be made liquid-tight, and these can be protected from water, dust and the like.

Further, by interposing a seal member 39 between the first housing 11 and the injector 17, these connections can be made liquid-tight and can be protected from water, dust and the like. .

Further, the internal connector 23 is
And a second connector 67 connected to the internal connector 23 is provided on the back side of the lid 60 that closes the opening 20a.
And the second connector 6 to the internal connector 23
7 can be held only by fastening a single bolt 65.

In the above-described embodiment, an example in which the engine control unit 50 as the electronic control unit is attached to the intake device 1 has been described. However, the present invention is not limited to this. An electronic control unit such as a control unit may be attached to another resin member.

In the case where the engine control unit 50 is attached to the intake device 1, in the above-described embodiment, some or all of the components of the air cleaner 2, the communication passage 3, the surge tank 4, and the intake duct 5 are removed. Although the example in which the engine control unit 50 is attached to the first housing 11 formed integrally has been described, the present invention is not limited to this, and other components are integrated to form a resin member (the first housing 11). 11) may be formed. Further, the mounting position of the engine control unit 50 is not limited to the air cleaner 2 and may be mounted at another position.

Further, the electrical components mounted on the resin member (first housing 11) to which the electronic control unit (engine control unit 50) is mounted are not limited to the electronic control throttle valve 16 and the injector 17, and are not limited thereto. Electrical components.

Also, a resin member (first housing 11)
Electrical components other than those mounted on the electronic component may be connected to an electronic control unit (engine control unit 50) via a harness (harness 24) embedded in a resin member.

[0045]

As described above, according to the present invention, it is possible to reduce the number of harnesses to be wired in the engine chamber, thereby improving the mountability and operation reliability and reducing the cost.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of a main part of an intake device and an electronic control unit.

FIG. 2 is a perspective view of an electronic control unit.

FIG. 3 is a schematic configuration diagram showing a main part of an intake device.

FIG. 4 is an essential part cross-sectional view showing a state where the electronic control unit is attached to the intake device.

FIG. 5 is a cross-sectional view of a main part of FIG. 4 viewed from a direction V.

FIG. 6 is a cross-sectional view of a main part near an injector mounting portion.

FIG. 7 is a plan view showing an injector mounting portion.

[Explanation of symbols]

 Reference Signs List 1 intake device 2 air cleaner (intake system component) 3 communication path (intake system component) 4 surge tank (intake system component) 5 intake duct (intake system component) 11 first housing (resin member) 16 electronic control throttle valve (electrical component) 17) Injector (electrical component) 20 Substrate storage 20a Opening 24 Harness 50 Engine control unit (Electronic control unit) 51 Control unit substrate 60 Lid 67 Second connector (connector)

Claims (2)

[Claims] An electronic control unit includes at least one electrical component connected to the electronic control unit, a resin member in an engine chamber provided with a substrate storage portion, and a control unit substrate of the electronic control unit in the substrate storage portion. A mounting structure of an electronic control unit for a vehicle to be housed, wherein the electronic control unit is fixed to the control unit board and closes an opening of the board housing section; And a connector connectable to a harness embedded inside the resin member when the lid closes the opening, and at least the electrical component mounted on the resin member and the control unit board Connection structure for the vehicle electronic control unit, wherein the connection with the electronic control unit is performed via the connector. 2. The vehicle electronic device according to claim 1, wherein the resin member is a member formed by integrally forming a part or all of constituent members of a plurality of intake system components constituting an intake device of an engine. Control unit mounting structure.