JPS6036767A - Electronic control device mounting structure for vehicle - Google Patents

Abstract

PURPOSE:To shorten a wire harness connecting the electronic control device with a suction air amount measuring instrument by a method wherein the electronic control device is housed in a housing section, receiving the suction air amount measuring instrument. CONSTITUTION:The electronic control device 40 is secured to the inner wall of a lid body 37 and the lid body 37 is fitted onto a connecter member 36 from the upper part thereof to oppose the electronic control device 40 to the hollow part of the connector member 36. The connecter pin P1 of the connector 36a is connected to the input terminal 41 of the electronic control device 40 and respective connecter pins P2 of the connecter 36b are connected to respective input terminals 42 of the device 40. The connecter member 36 is fitted to the opening end of a casing 31c through a seal member 36c together with the lid body 37, screws 38 are tightened, the electronic control device 40 is attached integrally to the inside of the suction air amount measuring instrument 30 and the electrical connection between the electronic control device 40 and the measuring instrument 30 are effected through both connecters 35f, 36a.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to an electronic control device for a vehicle, and particularly to a mounting structure of an electronic control device connected to an intake air amount measuring device that measures the amount of intake air in a vehicle engine. Seki (1) Do.

(Prior Art) Conventionally, as this type of electronic control device, for example, as disclosed in Japanese Unexamined Patent Publication No. 471-9354, there is a method for measuring intake air by an intake air amount measuring device installed in the engine room. There are some that operate depending on the quantity. However, in such a configuration, the electronic control device is usually manufactured separately from the intake air amount measuring device, and is installed, for example, at the back of the glow box in the passenger compartment from the engine room side. Therefore, there was a problem that the volume of the grow box became narrow. In addition, if an electronic control device is installed in the engine room like an intake air amount measuring device, the dimensions and shape of the electronic control device are relatively large compared to the extra space in the engine room, so it may impair the style of the vehicle or the installation Problems such as inability to do so may occur. In addition, when the electronic control device is installed in the passenger compartment, the electronic control device must be connected to the intake air amount measuring device using a wire harness through a through hole provided in the partition wall between the engine room and the passenger compartment.
), which not only increases the length of the wire harness, but also causes problems such as noise in the engine room entering the passenger compartment through the N hole in the partition wall. Also,
Such a problem becomes even more serious because a large number of detectors in addition to the intake air amount measuring device are connected to the electronic control device.

(Object of the present invention) The present invention has been made in view of the above, and its purpose is to attach a vehicle electronic control device to an intake air amount measuring device by effectively utilizing its structure. The present invention relates to a mounting structure for a vehicle electronic control device.

(Structure of the present invention) In achieving such an object, the present invention has a structure comprising: a cylindrical body that is interposed in an intake pipe of a vehicle engine and allows air flow to be drawn into the intake pipe to pass; A box-shaped accommodating part integrally formed on the outer wall of the cylindrical body, a measuring mechanism housed in the accommodating part and measuring the amount of intake air flow passing through the cylindrical body, and a measuring mechanism assembled to the accommodating part. In an electronic control device connected to an intake air amount measuring device having a lid body covering the measuring mechanism, the electronic control device is formed of a hybrid integrated circuit, and the hybrid integrated circuit is The present invention is arranged so that the housing is housed in the housing section.

(Effects of the Present Invention) By configuring the present invention in this way, the electronic control device formed very compactly using a hybrid integrated circuit can be installed in the existing housing section of the intake air amount measuring device. Since it is housed together with the mechanism, the wiring harness that connects the electronic control unit to the intake air amount meter becomes extremely short, which helps improve workability, lower costs, and improve reliability. In such a case, since the electronic control device is housed in the surplus space of the intake air amount measuring device located in the engine room as described above, each of the problems described in the description of the prior art in this specification can be avoided. It doesn't come with anything. Additionally, since many detectors are generally connected to the electronic control device in addition to the intake air amount measuring device, the wire harnesses connecting these detectors and the electronic control device (4) also become shorter. Of course.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.
The figure shows a vane-type intake air amount δ1 measuring device 3 to which the present invention is applied.
0 shows a state in which the air cleaner 20 is interposed between the intake pipe 10 and the air cleaner 20 of the vehicle engine. The intake air amount measuring device 30 is installed in a housing 3 as shown in FIGS. 1 and 2.
1, this housing 31 has a circulation pipe 31a and a damper portion 31b arranged side by side inside thereof, and a casing portion 31C is formed on the upper wall of the housing 31 as shown in FIG. has been done. The flow pipe 31a is the intake pipe 10
is connected between the open end 11 of the air cleaner 20 and the discharge port 21 of the air cleaner 20 to allow air to flow from the air cleaner 20 into the intake pipe IO.

In addition, the intake air amount measuring device 30 includes a rod 3 rotatably supported within the annular boss portion 31d hanging from the center of two walls of the housing 31 via both bearings 32 and 32.
3, a swing plate 34 disposed in the flow pipe 31a (5) and connected to the rod 33 so as to be swingable in the direction of air flow; When there is no air flow in the flow pipe 31a, the rocking plate 34 receives the repulsive force of a plate-shaped coil spring 35a provided in the measurement mechanism 35 to prevent the flow from flowing. Close the conduit 31a,
When an air flow exists in the circulation pipe 31a, the coil spring 35a swings against the coil spring 35a depending on the amount of the air flow, thereby allowing the air flow to flow into the intake pipe 10.

The measurement mechanism 35 includes a printed circuit board 35b attached to the upper wall of the housing 31 via a pedestal, and a
A sliding resistance surface 35C formed on the upper surface, a rotor 35d fixed to the upper end of the rod 33, and a slider 35e fixed to the lower surface of the rotor 35d and slidingly in contact with the sliding resistance surface 35c.
The swing angle of the swing plate 34, that is, the rod 33
The amount of sliding movement of the slider 35e on the sliding resistance surface 35c corresponding to the rotation angle of the rotor 35d corresponding to the rotation angle of the wire (6) is determined as a measurement voltage representing the amount of intake air. l. Further, inside the casing portion 31c, a connector 35f is assembled on a pedestal 31e that protrudes from the earthen wall of the housing 31 at the right end in FIG. 2, and this connector 35f has a sliding resistance surface. The tip of the wire harness l extending from 35c is connected through the pedestal 31e. This means that the measured voltage led to the wire harness l is led to the connector 35f through this wire harness β.

A lid body 37 is attached to the open end of the casing portion 1331c by tightening a plurality of screws 38 to 38 via a substantially annular connector member 36 in order to cover the measurement mechanism 35. 1ffi storage part 31C for the middle part
On the inner wall of the lid body 37 facing inward, a thin plate-shaped electronic control device 40 formed very compactly using a hybrid integrated circuit necessary for controlling the engine is directly fixed without employing a protective case. The connector member 36 is integrally molded from a synthetic resin material, and is
7) A connector 36a (see Fig. 2) is fitted and connected to the engine 3Sf, and a connector 36b is connected to a connector attached to the tip of each wire harness extending from various detectors arranged in various parts of the engine. (See Figures 1 and 2). In such a case, 1 in the connector 36a
A plurality of 7-shaped connector pins PI (only one is shown in FIG. 2) and a plurality of pairs of connector pins P2 and P3 in the connector 36b are integrally inserted and fixed when the connector member 36 is molded. The lid 37 is made of a metal material, and a plurality of heat radiation fins 37a are formed on the outer wall of the lid 37. Note that the connector pin P1 is connected to the electronic control device 40 at one end extending into the hollow portion of the connector member 36.
The measured voltage from the connector 35f is input to the input terminal 41 of the connector 35f. Also, each connector pin P2. . . , P2 are each input terminal 42 . ...142 is connected. Further, reference numeral 36c indicates a sealing member.

(8) In this embodiment configured as described above, the electronic control device 40 is fixed to the inner wall of the lid 37, and the lid 37 is fitted onto the connector member 36 from above.
corresponds to the hollow part of the connector member 36, and the connector 36
Connector pin P1 of a to input terminal 4 of electronic control device 40
1, and each connector pin P2゜..., P2 of the connector 36b is connected to each input terminal 4 of the electronic control device 40.
2, . By simply tightening each screw 38, the electronic control device 40 can be integrally mounted within the intake air amount measuring device 30, and the electronic control device 40 and the measuring mechanism 35 can be electrically connected by both connectors 35f and 36a. Then, the electrical connection between the electronic control device 40 and the connector 36b is completed.

In such a case, the electronic control device 40, which is very compactly formed using a hybrid integrated circuit, is configured to perform suction (9) in the space formed by the casing portion 31c of the large air amount measuring device 30, the hollow portion of the connector member 36, and the lid body 37. Since the intake air amount measuring device 30 is located at 1, the wiring harness used for connecting the electronic control device 40 and the intake air amount measuring device 30 can be saved. Particularly, since the input terminal of the electronic control device 40 is directly connected to the connector 36a, there is no need for a wire harness and an extra connector between the connector 36a and the input terminal of the electronic control device 40, and this eliminates the noise caused by this type of wire harness. Connector connection failures can be suppressed, leading to improved reliability. In this case, as described above, since the electronic control device is housed in the surplus space of the intake air amount measuring device 30 located in the engine room, various There are no problems.

Further, since a large number of detectors are connected to the electronic control device 40 via the connector 36b, it goes without saying that the length of the wires connecting each of these detectors and the electronic control device 40 is also shortened.

Furthermore, as mentioned above, since the hybrid integrated circuit itself, which is the electronic control device 40 (10), is directly fixed to the inner wall of the lid 37, a protective case normally required for this type of hybrid integrated circuit is not required. This eliminates the need for the lid body 37 and also serves as a protective case for the lid body 37, thereby helping to reduce costs by reducing the number of parts. In such case,
Since the heat radiation fins 37alJ< are provided on the outer wall of the lid body 37, the thermal energy generated in the hybrid integrated circuit is appropriately radiated to the outside by the thermal conductivity of the lid body 37 and the heat radiation action of the radiation fins 37a. The hybrid integrated circuit can always be operated in the proper ambient temperature range.

In the above embodiment, an example has been described in which the hybrid integrated circuit constituting the electronic control device 40 is directly fixed to the inner wall of the lid 37, but instead of this, the hybrid integrated circuit may be covered with a suitable protective case. The heat dissipating fins 37a may be supported within the casing portion 31C apart from the inner wall of the lid 37. In such a case, the radiation fins 37a may be
It can also be omitted from.

Further, in implementing the present invention, both connectors 35f,
36a and the input terminal 41 of the electronic control device 40 may be provided on the connector 36b side, and the wire harness may be omitted.

Further, in the above embodiment, an example in which the present invention is applied to the vane type intake air amount measuring device 30 has been described, but instead of this, even if the present invention is applied to a hot wire type intake air amount measuring device, the above-mentioned Effects similar to those of the embodiment can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing how a vane-type intake air amount measuring device to which the present invention is applied is assembled to an engine intake pipe and an air cleaner, and FIG. 2 is a diagram showing the intake air amount measuring device 3 in FIG. 1.
FIG. Description of symbols 10... Intake pipe, 30... Vane type intake air amount measuring device, 31a... Distribution pipe, 31c... Casing part, 35... Measuring mechanism, 37... Lid body , 40...Electronic control device.

Claims (1)

[Claims] A cylindrical body that is installed in an intake pipe of a vehicle engine and allows air to be drawn into the intake pipe to pass through, a box-shaped housing part that is integrally formed on the outer wall of this cylindrical body, and a box-shaped housing part that is housed in the housing part. an electronic control device connected to an intake air amount measuring device having a measuring mechanism for measuring the amount of intake air flow passing through the cylindrical body; and a lid assembled to the accommodating portion and covering the measuring mechanism; 1. A mounting structure for an electronic control device for a vehicle, characterized in that the electronic control device is formed by a hybrid integrated circuit, and the hybrid integrated circuit is housed in the housing portion.