JPH0472432A - Printed-wiring board and internal combustion engine control device using same - Google Patents

Abstract

PURPOSE:To absorb deviation even when the mounting angle of rotation of a device or a printed-wiring board is deviated from a specified angle by dividing connection holes into the same number of groups as that of terminals, and connecting the respective groups separately to the same number of electrically conductive patterns as that of the terminals. CONSTITUTION:Connection holes 55A - 55G more than the number of terminals 3B, 7B, 8B, 10B of a device to be connected to a printed-wiring board, are bored in the printed-wiring board in a circle around at least a specific point. The connection holes 55A - 55G are divided into the same number of groups as that of the terminals 3B, 7B, 8B, 10B, and the respective groups are connected separately to the number of electrically conductive patterns as that of the groups. thus, for example, the connection holes into which the terminals of the device are to be connected, can be selected in accordance with the mounting angle of rotation.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a printed wiring board and an internal combustion engine control system using the same, and in particular, to a printed wiring board and an internal combustion engine control system using the same. The present invention relates to a printed wiring board that can be easily attached to a printed wiring board where the wiring cannot be determined, and an internal combustion engine control system using the same.

(Prior Art) An electronic control unit installed in a vehicle having an internal combustion engine receives output signals from various sensors installed in the engine and engine peripheral equipment, and controls the upstream and downstream of the injector and throttle valve. It controls various actuators such as valves that control the opening of the communicating idle bypass passage, and sets the engine operating state to the optimum state.

Conventionally, such an electronic control device is placed outside the engine room, for example, in a vehicle interior, and the electronic control device and the various sensors and actuators are connected using a wire harness.

Such an internal combustion engine control system was developed in the U.S. Pat.
No. 3672, No. 62-187294, etc.

By the way, when the electronic control device is placed in a place other than the engine room, it is necessary to connect the electronic control device and various sensors and actuators of the engine with a wire harness. At this time, the wire harness must be routed inside the vehicle, making the connection troublesome.

Further, since the wire harness becomes long, noise is likely to be added to the wire harness, and the weight increases.

In order to eliminate such concerns, for example, the electronic control device is attached to the throttle body, and connections between the electronic control device and various sensors and actuators of the engine are made using a flexible printed wiring board (hereinafter referred to as This can be done by using FPC (FPC).

Alternatively, the circuit constituting the electronic control device may be
At the same time, the FPC may be placed in the throttle body, and various sensors and actuators of the engine may be directly connected to the electronic control device (ie, FPC).

The throttle body can be provided with various sensors and actuators for the engine, so if configured as described above, the distance between the electronic control unit and the various sensors and actuators can be shortened, and their connections can be made using a wire harness. Since the connection can be made without using a , the connection becomes easy.

By the way, when installing the sensor on the throttle body,
In order to facilitate the installation, a thread may be formed on the outer periphery of the sensor, and the male thread may be screwed into a female thread formed on the throttle body.

FIG. 24 is a front view of an example of a sensor attached to the throttle body.

In the figure, a sensor 200 is, for example, a Tw sensor that detects the engine cooling water temperature, and a probe 200B is disposed at the tip of the sensor 200.
A threaded portion 200A is formed on the outer periphery of B. The symbol 200C is a terminal (pin).

As described above, the sensor 200 is attached to the throttle body by screwing the threaded portion 200A into an internal thread (not shown) formed in the throttle body.

FIG. 25 is a diagram showing how the sensor 200 and FPC 210 are connected.

In FIG. 25, when the sensor 200 is attached to the throttle body, the FPC 210 is placed on the side of the sensor 200 from which the terminal 200C protrudes, and the terminal 200C is inserted into the connection hole 211 formed in the FPC 210. Then, by soldering them, the terminal 200
C is connected to a conductive pattern 212 formed on the FPC 210.

(Problems to be Solved by the Invention) The above-described conventional techniques had the following problems.

That is, since the sensor 200 is attached to the throttle body by screwing, the F of the terminal 200C may
The mounting position of the PC 210 with respect to the connection hole 211 is the 26th
As shown in the figure, there may be a maximum shift of 90 degrees.

In this case, the terminal 200C cannot be inserted into the connection hole 211 unless the terminal 200C is bent significantly, so the connection is troublesome.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to connect devices such as sensors and actuators that are mounted by screwing, etc., and whose mounting angle cannot be determined, to a printed wiring board. An object of the present invention is to provide a printed wiring board that can be connected without bending the terminals of the device too much when connecting the terminals of the device, and an internal combustion engine control system using the printed wiring board.

(Means and effects for solving the problems) (1) In order to solve the above problems, the present invention provides a printed wiring board with:
A number of connection holes greater than the number of terminals of devices to be connected to the wiring board are bored in a circle around at least a predetermined point, and the connection holes are divided into groups of the same number as the number of terminals. The present invention is characterized in that each group is individually connected by the same number of conductive patterns. Thereby, the connection hole into which the terminal of the device is to be inserted can be selected depending on, for example, the mounting rotation angle of the device.

Another feature is that at least an arc-shaped elongated hole centered at a predetermined point is formed in the printed wiring board, and the elongated hole is connected to the conductive pattern. Thereby, the terminal of the device can be moved within the connection hole depending on the mounting rotation angle of the device, for example.

(2) The present invention also provides an internal combustion engine that includes a throttle body that accommodates a throttle valve, a device that is screwed onto the throttle body, and an electronic control that is connected to at least the device and that controls the internal combustion engine. In an internal combustion engine control system comprising a device, the circuit of the electronic control device is formed on a flexible printed wiring board similar to the printed wiring board having the above-described configuration, and the circuit is disposed inside the throttle body, and the terminals of the device are arranged in the throttle body. , is also characterized in that it is connected to the wiring board.

Furthermore, in the internal combustion engine control system as described above, the electronic control device is attached to the throttle body, and the terminal of the device and the electronic control device are connected by the printed wiring board described above. It also has its own characteristics.

Such a configuration shortens the V1 separation between the device and the electronic control unit, and also facilitates their connection.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a schematic diagram showing the configuration of an embodiment of the present invention.

In the figure, the air taken in from the air cleaner 24 in the direction of arrow A is converted into a mixture by the fuel injected from the injector 4 disposed in the throttle body 1 having the throttle valve 2, and further flows through the intake manifold 22. , is introduced into the engine 21.

The fuel pump 9 sucks fuel (in the direction of arrow B) from a fuel tank (not shown) and supplies it to the injector 4 via the regulator 9R. Fuel not injected by the injector 4 returns to the fuel tank via the return pipe (in the direction of arrow R).

The air-fuel mixture is combusted within the engine 21, passes through the exhaust manifold 23 (in the direction of arrow C), and is further discharged via a muffler (not shown).

The bypass passage 5 is provided so as to communicate the air flow upstream side and the downstream side of the throttle valve 2.

This bypass passage 5 controls the amount of intake air during idling, and its opening degree is controlled by a control valve 6.

Inside the throttle body 1, a Ta sensor 7 for detecting atmospheric temperature and a MAP sensor 10 for detecting negative pressure in the intake pipe are arranged. The Ta sensor 7 and the MAP sensor 10 are attached to the throttle body 1 so that their probes are exposed on the upstream and downstream sides of the throttle valve 2 in the air passage within the throttle body 1.

Further, engine cooling water is introduced into a predetermined area within the throttle body 1, and a 7W sensor 8 for detecting the temperature of the engine cooling water is provided at the introduction portion.

The throttle body 1 further includes an electronic control device 70.
is installed. This electronic control device 70 is configured by forming an electronic circuit on an FPC as described later.

The FPC of this electronic control device 70 includes the throttle valve 2
It is directly connected to the terminals and lead wires of the Th sensor 3 that detects the opening degree of the injector 4, the control valve 6, the Ta sensor 7, the W sensor 8, the fuel pump 9, and the MAP sensor 10.

Reference numeral 11B is a lid, and the lid 11B has a connector 11A.
is installed. The electronic control device 70 is connected to this connector 11A.

Further, the connector 12A of the wire harness 12 is connected to the connector IIA, and thereby a spark plug, a battery, or various data input/output devices provided in the instrument panel are connected to the electronic control device 70. .

Figure 3 is a perspective view of the throttle body 1, and Figure 12 is a perspective view of the throttle body 1.
Figure 5 is a cross-sectional view of the main part of Figure 3 viewed from the direction of arrow E. Figure 6 is a cross-sectional view of Figure 12 viewed from the direction of arrow E.
FIG. 3 is a cross-sectional view taken along a line.

In FIG. 3, a frame IB that accommodates the electronic control device 70 is shown.
, and MllZ covering the frame IC are partially broken. Further, in FIG. 12, the MIIB and the lid 112 are removed, and the frame IB and the frame I
A part of C is broken. Furthermore, in FIG. 6, the 7w sensor 8 is not broken. Electronic control device 7 in FIG.
A diagram with 0 removed is shown in Figure 4.

In FIGS. 3 to 6 and FIG. 12, the same reference numerals as in FIG. 2 refer to the same or equivalent parts.

First, as shown in FIG. 5, the throttle body 1 consists of three bodies: a lower body IX, an intermediate member IY, and an upper body IZ. A throttle valve 2 is attached to the lower body IX, and an injector 4 is attached to the upper body IZ. This injector 4 is attached using a male screw 101 and a cap 102. In addition, in FIG. 5, the air passage in the throttle body 1 is depicted as being closed due to the arrangement of the injector 4, but in reality, in FIG. Air is allowed to pass through.

Fuel is introduced into the injector 4 via a fuel pump, regulator, and fuel passage 103 (not shown).

A Th sensor 3 is attached to the end of a shaft that supports the throttle valve 2 attached to the lower main body 1X.

The lower main body IX and the upper main body IZ are connected by an intermediate member IY made of a material with relatively high heat insulation properties, such as resin.

The lower main body IX has an engine 21 (FIG. 2).
An air cleaner 24 (
(Fig. 2) is attached.

Due to the negative pressure generated by the operation of the engine 21, outside air is drawn into the throttle body 1 through the window IW formed in the upper main body IZ (in the direction of arrow G).

Although not shown in FIG. 5, the throttle body 1 includes a bypass passage 5 as described above with respect to FIG.
is formed.

Next, in FIGS. 4 and 5, a lead wire 4A of the injector 4 is drawn out and a Ta sensor 7 is attached to the frame IB formed in the upper main body 1z.

Inside the frame IC, as shown in the figure, a MAP sensor 10,
A Th sensor 3 and a 1w sensor 8 are arranged. A male thread is formed on the outer periphery of the 7w sensor 8, and as shown in FIG. 6, it is attached to the throttle body 1 by screwing into a female thread formed on the lower body 1x. Reference numeral 104 in FIG. 6 indicates the lower body I
This is a region for introducing engine cooling water into X, and the TW sensor 8 is attached so that the probe of the 1W sensor 8 is exposed in this region 104.

The frame IC is further connected to the lead wire 9A of the fuel pump (fuel pump 9 shown in FIG. 2) and the lead of the control valve (control valve 6 shown in FIG. 2) through grommets 33 and 34. Line 6A is drawn.

Symbols 3B, 7B, 8B and IOB are Th sensor 3, Ta sensor 7.1w sensor 8 and MAP sensor 1, respectively.
0 terminal (pin).

In addition, in the frame IB of the two-part main body IZ, there is a mount IE and pin ID for fixing the FPC of the electronic control device 70.
is formed.

As shown in Figure 4, various sensors 3.7.8 and 1
0 and the lead wires 4A, 6A, and 9A are completed, the frame IB is opened as shown in FIG.
The electronic control device 70 is passed through the grommet 32 inserted into the hole communicating with the frame IC, and the electronic control device 70 is placed in the frame IB and the frame IC. In this case, the FPC 7OA constituting the electronic control device 70 is bent as necessary.

A plan view of this electronic control device 70 is shown in FIG.

Note that in FIG. 7, illustrations of electronic circuits and conductive patterns arranged or formed on the FPC 7OA are omitted.

As described above, the electronic control device 70 includes a predetermined electronic circuit provided on the FPC 70A.

As shown in FIG. 7, the FPC 7OA has connection holes 55A to 55G1 for soldering the terminals and lead wires of the various sensors and actuators, and a terminal 11C of the connector 11A attached to the lid 11B (see FIG. ) for soldering, and a mounting hole 52 for fixing the electronic control device 70 to the upper main body IZ.

After arranging the electronic control device 70 as described above, the terminals 3B, 7B, 8B, and 10B of the various sensors described above and the lead wires 4A, 6A, and 9A are soldered to each connection hole 55A to 55G of the FPC 7OA. .

Here, as shown in FIG. 4, there are two terminals 8B of the TW sensor 8, but there is an FP for inserting the terminals 8B.
There are four connection holes 55D of C70A as shown in FIGS. 7 and 12.

FIG. 1 shows an enlarged view of the connection hole 55D and its vicinity of the FPC. In Fig. 1, the same symbols as in Fig. 7 are the same as those in Fig. 7.
Or the equivalent part is covered.

In FIG. 1, the FPC 70A is arranged at a distance approximately half the distance between the pair of terminals 8B of the 1W sensor 8, and at approximately equal angles (in this example, at every 90 degrees) with the point P as the center.
, four connection holes 55D are bored. Two of the four connection holes 55D (connection holes indicated by symbol H1)
are connected by a conductive pattern 81, and the other two
The two connection holes 55D (connection holes indicated by the symbol H2) are connected by a conductive pattern 82.

One of the pair of terminals 8B (FIG. 4) of the 1W sensor 8 is soldered to one of the two connection holes connected by the conductive pattern 81, and the other of the pair of terminals 8B is
It is soldered to one of the two connection holes connected by the conductive pattern 82.

Here, the point P which is the center of the four connection holes 55D is 1w
If the FPC 70A is attached to the throttle body 1 so that it coincides with the center of the pair of terminals 8B protruding from the sensor 8, then if the pair of terminals 8B of the 7W sensor 8 have no polarity, the terminals 8B and the connection hole 55D will be aligned. The maximum deviation angle is 45 degrees.

On the other hand, in the conventional printed wiring board, the deviation angle between the terminal and the connection hole is at most 90 degrees, as is clear from FIG.

That is, the printed wiring board of this embodiment can largely absorb the deviation angle when the 7W sensor 8 is attached.

In addition, when the pair of terminals to be connected have polarities, the deviation angle is a maximum of 135 degrees in the embodiment described above, and a maximum of 180 degrees in the conventional printed wiring board.

Now, in this way, terminal 3B of various sensors.

7B, 8B and 10B1 and the lead wire 4A.

6A and 9A, and each connection hole 55A to 55 of FPC7OA
After soldering with G is completed, insert the pin ID (Fig. 4) formed in the frame IB into the mounting hole 52 drilled in the FPC7OA, and attach the pin ID (Fig. 8) to the tip of the pin ID. As shown in the figure, cover the cap 62 and place the FPC7OA in the frame IB.
Fixed inside. The cap 62 may be fixed by using the elasticity of the cap 62, or by applying an adhesive to the pin ID and then covering the pin ID with the cap 62.

Further, as shown in FIG. 9, a convex portion II is formed at the tip of the pin ID, and four portions 62 are formed inside the cap 62A.
B may be formed, and the cap 62A may be fixed to the pin ID by fitting the convex portion 11 into the concave portion 62B.

In addition, in this embodiment, the FPC 70 by the cap 62
Although A is fixed at only two places, it may be fixed as many times as necessary depending on the size of the electronic control device 70, etc. Furthermore, if the electronic control device 70 does not become very large, it is not necessary to fix the FPC 7OA.

Next, the terminal 11C of the connector IIA attached to the lid 11B is soldered to the connection hole 55Q of the FPC 70A. Then, the lid 1 is attached to the frame IB by screwing, for example.
Fix 1B.

Reference numeral 35 in FIG. 12 indicates the above! ! This is a female thread for attaching IIB. Further, the lid 11B functions as a cover for the frame IB.

After that, the lid 112 is attached to the opening of the frame IC using an appropriate method.

When the assembly of the throttle body 1 is completed in this way, the throttle body 1 is connected to the intake manifold 22 attached to the engine 21, and further,
An air cleaner 24 is attached to the throttle body l. As a result, an engine system consisting of the engine and its control means (that is, the electronic control device 70) is completed. Therefore, it is possible to operate the engine system before mounting the engine on the vehicle body.

(Modification) (1) Now, in the FPC7OA shown in FIG.
Although the explanation has been made assuming that the holes are drilled every other time, for example, the first
As shown in FIG. 3, six connection holes 55D are drilled at equal angles around point P, and three adjacent connection holes 55D indicated by number n H1 are connected with a conductive pattern 81. However, similarly, three adjacent connection holes 55D indicated by the symbol H2 may be connected by a conductive pattern 82.

In this case, if the pair of sensor terminals has no polarity,
The maximum deviation angle between the terminal and the connection hole 55D is 30 degrees.

Further, it goes without saying that eight or more connection holes may be provided.

(2) Also, instead of drilling a circular connection hole 55D that is slightly larger than the terminal to be connected to the FPC, a pair of arc-shaped connection holes 55R are drilled with the point P as the center, as shown in FIG. By doing so, it is also possible to absorb deviations in the mounting rotation angle of the sensor.

(3) In the above embodiments, the present invention was explained as being applied to a printed wiring board to which the terminal 8B of the 7w sensor 8 is soldered. Of course it is possible.

In this case, as shown in FIG. 15, the sensor 300 has a total of three terminals 300C, one in the center of the threaded part 200A formed on its outer periphery and two on both sides.
When connecting, as shown in FIG. 16 or 17, a connection hole 55D (and connection hole 55R) is bored,
What is necessary is just to connect them with the conductive patterns 81-83.

In addition, when connecting the sensor 400 having four terminals 400C as shown in FIG. 18, the connection hole 55D (or connection hole 55R) is drilled as shown in FIG. 19 or 20. conductive patterns 81 to 84
You can connect with .

(4) The conductive pattern to be formed on the FPC is the first
．． 13.14.16.1? , 19.20 may be other than those shown in Figures. The shape of this conductive pattern can be easily created by those skilled in the art.

(5) In the above description, terminal 3B of various sensors,
The connection between 7B, 8B and IOB and FPC70A is the first
As shown in FIG. 0, the soldering is performed by soldering (reference numeral 40 in the same figure); for example, as shown in FIG. 11, the terminals 3B, 7B.

Connection may be made by forming or fixing a collar 42 on 8B and IOB, fitting a cap 41 to the tip of the terminal, and caulking if necessary.

(6) Furthermore, in the above embodiment, the electronic control device 7
0 has been described as being arranged in the frame IB, of the circuits constituting the electronic control device 70, the part related to the control circuit of the sensor (for example, the MAP sensor 10) arranged in the frame IC is It goes without saying that it may be formed on a separate wiring board from the device 70 and placed within the frame IC. That is, the electronic control device may be formed on two or more wiring boards, and these may be arranged at different locations within the throttle body 1.

(7) Furthermore, in the embodiment described above, the upper main body IZ to which the electronic control device 70 is attached is attached to the lower main body IX via the intermediate member IY having heat insulating properties. Such a configuration makes it difficult for engine heat to be conducted to the electronic control device 70 via the intake manifold 22.

However, such heat conduction to the electronic control device 70 can be prevented by forming the upper main body IZ or the lower main body IX itself from a material having heat insulating properties, or by forming the intake manifold 22 from a material having heat insulating properties. This can also be achieved by doing so.

(8) Also, in this embodiment, the injector 4 is configured to inject fuel to the throttle valve 2,
As a result, the throttle valve 2 is cooled by the latent heat of vaporization of the fuel, so that the throttle valve 2, that is, the lower body IX
This increases the amount of heat radiated, and can further contribute to preventing heat conduction to the electronic control device 70.

Of course, instead of providing the injector 4, a carburetor may be used to inject fuel into the throttle valve 2.

(9) Furthermore, if the engine has multiple cylinders, only one throttle body 1 is provided,
The air-fuel mixture passing through the throttle body 1 may be distributed using an intake manifold having a branch structure, or a throttle body 1 may be provided for each cylinder.

(10) Also, the FPC 70 that constitutes the electronic control device 70
The shape of A is not limited to only that shown in FIG. 7, and can be set to any shape depending on the number and layout of sensors and actuators to be connected to the FPC 70A. be.

(11) Furthermore, it goes without saying that the present invention can be applied not only to internal combustion engine control systems for automobiles, but also to internal combustion engine control systems for vehicles such as motorcycles and work vehicles.

(12) In the above embodiment, the circuit constituting the electronic control device is formed on the FPC, but for example, the electronic control device may be formed on a non-flexible printed wiring board, and the electronic control device may be It goes without saying that after being attached to the throttle body, the electronic control unit and various sensors and actuators of the engine may be connected using FPC.

FIG. 21 is a cutaway sectional view of a main part of a throttle body having such a configuration, and is a view similar to FIG. 5. Second
1, the same reference numerals as in FIG. 5 represent the same or equivalent parts.

In FIG. 21, reference numeral 11 is an electronic control device whose circuit is formed on a non-flexible printed wiring board, and is attached to the lid 11B.

And this MllB is throttle body 1 frame IB
installed on.

A connector IIA is attached to the M11B, and the connector IIA is connected to the lightning control device 211.

The FPC 50 is for connecting the electronic control device 11 to the terminals 3B, 7B, 8B and 10B1 of various sensors and the lead wires 4A, 6A and 9A. As shown in FIG. 22, this FPC 50 includes the terminals 3B, 7B, 8B and 10B, and the lead wire 4A.
, 6A and 9A and are provided with connection holes 55A to 55G for insertion and soldering. Note that in FIG. 22, illustration of the conductive pattern is omitted.

Figure 23 shows the electronic control device 1 to be installed in the frame IB.
1 and a side view of the throttle body 1 before attaching the lid 11Z (see FIG. 21) to be attached to the frame IC, and is a view similar to FIG. 4 and FIG. 12 described above.

First, as shown in FIG. 4, once the various sensors have been installed and the lead wires have been drawn out, the FPC 50 shown in FIG. 22 is inserted into the grommet 32 (FIG. 23), and the FT' Place C50 in frame IB and frame IC.

Note that the FPC 50 is bent as necessary before or after being inserted into the grommet 32.

This bending makes it easy to attach the electronic control device 11, which will be described later, and to solder the terminals and lead wires of various sensors and actuators.

Then, connect the male screw 61 to the screw hole 5 drilled in the FPC 50.
1 (FIG. 22), fix it in the frame IC, and further insert the bin ID formed in the frame IB into the mounting hole 52 (FIG. 22) drilled in the FPC 50. The FPC 50 is fixed using the cap 62.

Thereafter, terminals of various sensors and lead wires of actuators are soldered to the connection holes 55A to 55G. This state is the state shown in FIG.

Thereafter, the assembled electronic control device 11 is placed in the frame IB, and the lid 11B is fixed to the frame IB, for example, by screwing. Note that the lid 11B functions as a cover for the frame IB.

During this installation, lead wires (not shown) of the electronic control device 11 are drawn out into the frame IC via the grommet 32. After installing the electronic control device 11, the lead wires of the electronic control device 11 are inserted into the connection holes 55K of the FPC 50 and soldered.

After this, MllZ is attached to the opening of the frame IC using an appropriate method.

In this way, the throttle body l is completed.

Although the electronic control device 11 and the various sensors and actuators are connected using the FPC 50, it is of course possible to use a non-flexible printed wiring board.

(13) In the above explanation, the printed wiring board includes:
In order to absorb deviations in the mounting angle of the device, the number of connection holes greater than the number of terminals of the device, or the arc-shaped connection holes have been described.

However, even if the mounting angle of the device is accurate, if the mounting position of the printed wiring board to be connected to the device cannot be determined, there may be a misalignment between the terminal of the device and the connection hole of the printed wiring board. occurs, so the present invention is applicable to such cases as well.

That is, the printed wiring board according to the present invention can be applied when the relative mounting angle with the device to be connected cannot be determined.

(Effects of the Invention) As is clear from the above description, according to the present invention, the following effects are achieved.

(1) According to the printed wiring board according to claims 1 to 3, depending on the mounting rotation angle of the device or the printed wiring board,
A connection hole can be selected into which the terminal of the device is to be inserted, or the terminal can be moved within said connection hole. Therefore, even if the mounting rotation angle of the device or printed wiring board deviates from a predetermined angle, the deviation can be absorbed.

(2) According to the internal combustion engine control system according to claim 4 or 5, the distance between the device and the electronic control device is shortened, and the signal input to the electronic control device or the signal output from the electronic control device is Noise is less likely to be added to the signal.

Furthermore, the device and the electronic control unit can be easily connected.

[Brief explanation of the drawing]

FIG. 1 is an enlarged view of the vicinity of an example of a connection hole formed in an FPC. FIG. 2 is a schematic diagram showing the configuration of an embodiment of the present invention. FIG. 3 is a perspective view of the throttle body. FIG. 4 is a diagram with the electronic control device of FIG. 12 removed. FIG. 5 is a sectional view of a main part of FIG. 3 viewed from the direction of arrow E. FIG. 6 is a sectional view taken along the line FF in FIG. 12. FIG. 7 is a plan view of the electronic control device. FIGS. 8 and 9 are diagrams showing how the FPC is fixed by the cap. FIG. 10 and FIG. 11 are diagrams showing a method of connecting the terminals of the sensor and the FPC. FIG. 12 is a view of FIG. 3 viewed from the direction of the arrow. 13.14.1ε, 17.19 and 20 are enlarged views of the vicinity of other examples of connection holes formed in the FPC. FIG. 15 and FIG. 18 are front views of an example of a sensor to be connected to F'PC. FIG. 21 is a sectional view of a main part of another example of the throttle body. FIG. 22 is a plan view of the FPC 50. FIG. 23 is a side view of another example of the throttle body. FIG. 24 is a front view of an example of a sensor to be attached to the throttle body. FIG. 25 is a diagram showing how the sensor and FPC are connected. FIG. 26 is a diagram showing the deviation angle when the sensor is attached. 1...Throttle body, IB, IC...frame, IX
...lower body, IY...intermediate member, IZ...upper body, 2...throttle valve, 3...Th sensor, 3
B. 7B, 8B, IOB... terminal, 4... injector, 4A, 6A, 9A... lead wire, 6... control valve,
7... Ta sensor, 8... Tw sensor, 9... Fuel pump, 10... MAP sensor, 21... Engine, 22... Intake manifold, 50.70A
FPC, 52... Mounting holes, 55A to 55G. 55Q...Connection hole, 62.62A...Kya knob,
70...Electronic control device attorney Patent attorney Michito Hiraki and 1 other person Figure 24-i Figure 15 Figure 16 Figure 19 Figure 18 Figure 17 Figure 20

Claims (5)

[Claims] (1) In a printed wiring board where the relative mounting angle to the terminals to be connected cannot be determined, the printed wiring board has a number of connection holes that exceed the number of the terminals and are spaced approximately equidistantly from each other with at least a predetermined point as the center; A printed wiring board characterized in that the connection holes are divided into the same number of groups as the number of the terminals, and each group is individually connected to the same number of conductive patterns as the number of the terminals. (2) In a printed wiring board where the relative mounting angle with respect to the terminal to be connected cannot be determined, the board has at least an elongated hole formed in an arc shape centered on a predetermined point, and the elongated hole is electrically conductive. A printed wiring board characterized by being connected to a pattern. (3) The printed wiring board according to claim 1 or 2, wherein the printed wiring board has flexibility. (4) An internal combustion engine comprising a throttle body that accommodates a throttle valve, a device screwed onto the throttle body, and an electronic control device connected to at least the device and controlling the internal combustion engine. In an engine control system, the electronic control device has a circuit formed on the printed wiring board according to claim 3 and is disposed within the throttle body, and a terminal of the device is connected to the printed wiring board. An internal combustion engine control system characterized by: (5) An internal combustion engine comprising a throttle body that accommodates a throttle valve, a device screwed onto the throttle body, and an electronic control device connected to at least the device and controlling the internal combustion engine. The engine control system according to claim 1, wherein the electronic control device is attached to the throttle body, and the terminal of the device and the electronic control device are connected to each other.
An internal combustion engine control system, characterized in that the system is connected by the printed wiring board according to any one of items 1 to 3.