JPH1144265A - Intake system control device for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the man-hours of assembly and wiring and to improve reliability by a method wherein at least a part of sensors, actuators, a wiring, and a control units are integrally formed at a part constituting an intake system. SOLUTION: An intake system control apparatus comprises a control apparatus 21 consisting of sensors to detect the operation state of an internal combustion engine, or actuators to control an intake amount and a fuel feed amount; a control unit 10 to drive the actuators by an input from the sensors; a wiring 27 to interconnect therebetween; and a terminal 24 connected to an external part. The intake system control apparatus is formed integrally with the outer wall 20 of the suction system constitution part of an internal combustion engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control electric device used for controlling an intake system of an internal combustion engine.

[0002]

2. Description of the Related Art FIG. 13 is an example of a system diagram of electric components used in an intake system of an internal combustion engine, and FIG. 14 is a side view in a longitudinal direction and a lateral direction showing a mounting state of these electric components. . As shown in FIG. 14, the intake system of the internal combustion engine 1 includes an air cleaner 2, a throttle body 3, an intake manifold 4, and the like. Sensors such as an air flow sensor and an intake air temperature sensor, an injector 8, an idle rotation control valve (I
Actuators such as an SC valve 9a and an exhaust gas recirculation valve (EGR valve) 9b not shown in FIG. 14 are separately provided, and the control unit 1 shown in FIG.
0 is generally installed in the vehicle interior, and is configured to drive and control actuators by using output signals of these sensors as inputs. A large number of signal lines and power supply lines are wired between these for signal transmission and reception and driving power supply.

As shown in FIG. 13, a control unit 10 includes a CPU 10a including a microcomputer for controlling each actuator by a signal input from each sensor.
A sensing circuit 10b which is an interface circuit between each sensor and the CPU 10a; and an output circuit which is an interface circuit between each actuator and the CPU 10a.
Power is supplied to the drive circuit 10c and the actuators via the output / drive circuit 10c, and the sensors and the CPU 1
The power supply circuit 10d supplies a predetermined power to the power supply circuit 10a itself. These sensors, actuators, and control unit control the supply of intake air and fuel in accordance with the operation state of the internal combustion engine to control exhaust gas and drivability.

[0004]

As described above, the control of the intake system of the internal combustion engine is performed by controlling the intake air and the fuel supply according to the operating condition of the internal combustion engine and the EGR of the exhaust gas recirculation system. Includes valves and has many sensors and actuators in the system.
After confirming the function of each of these parts as a single part, they are sequentially mounted in the assembly process of the intake system of the internal combustion engine. This leads to complication of the reconfirmation step of reconfirming the function later. In particular, an increase in the number of wires such as signal lines and power supply lines leads to an increase in the number of connection steps and a reduction in reliability due to incorrect connection.Also, as for the control unit, even if electronic components can be downsized, Handling has become difficult due to an increase in the number of connectors or wire harnesses required for connection with peripheral devices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. At least a part of sensors and actuators and wiring, or a part of an intake system, such as a throttle body, or It is another object of the present invention to reduce the number of steps of assembling and wiring and improve reliability by integrating a part of the function of the control unit or the control unit itself.

[0006]

SUMMARY OF THE INVENTION An intake system control apparatus for an internal combustion engine according to the present invention is an intake system control apparatus for an internal combustion engine configured to control an intake system of an internal combustion engine having a plurality of components. Sensors for detecting temperature and temperature conditions, actuators for controlling the amount of intake air and fuel supply by detecting the sensors, and control for driving the actuators by inputting and calculating the detection output of the sensors A control device having a unit, wiring for connecting these components to transmit signals and drive power, and a terminal for connecting to other devices, at least a part of the control device being integrated with an intake system component It is the one that was structured.

Further, the control device integrated with the components of the intake system is configured to be at least a part of the wiring. Further, the control device integrated with the intake system component is configured to be at least a part of the sensors, the actuators, and the wiring. Still further, the control device integrated with the intake system component is configured to be at least a part of the sensors, the actuators, and the wiring, and a part of the control unit. Further, the control device integrated with the components of the intake system is configured to be at least a part of sensors, actuators, and wiring, and a control unit.

In addition, the wiring integrated with the intake system components is embedded in the wall surface of the intake system component. Further, the wiring embedded in the wall surface is constituted by a bare stranded wire. In addition, the terminal connected to the wiring integrated with the components constituting the intake system,
This is formed on the wall surface of the intake system component. Furthermore, after the wiring has penetrated the cutout of the terminal,
The terminal is connected to the terminal by any of crimping, soldering, welding, or wire bonding. Furthermore, the wiring is bent in the vicinity of the terminal between the holding member and the terminal to reduce stress.

Further, sensors, actuators, and a control unit integrated with the components of the intake system are fixed to the components of the intake system, and portions other than the fixed portions are covered with a gelling resin. Further, a radiator plate is provided on the sensors, actuators, and control unit integrated with the components of the intake system, so that the radiator plate is exposed to the outside air or the intake air passage.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1A is an explanatory diagram showing the configuration of the first embodiment of the present invention, and FIG. 1B is a plan view of a connector portion. In the figure, reference numeral 20 denotes an outer wall of a component constituting an intake system of an internal combustion engine, for example, a component constituting an intake air passage such as a throttle body, an intake manifold, etc., which is formed of a resin molded product. Control device 2 for intake control of sensors, sensors or actuators
1 is mounted so that the functional portion protrudes from the outside air side to the intake air passage side through the outer wall 20, and the wiring 22 is integrated with the outer wall 20 of the intake system component from the terminal 21 a of the control device 21. It is fixed by a clip 23 and is connected to a terminal 24 which is integrated with the outer wall 20 and is connected to other components. A connector 25 is formed around the terminal 24 integrally with the outer wall 20.
4 is connected to the wiring 22 penetrating a part of the connector 25, and is configured to be integrally fixed to the outer wall 20 by the resin 26. Further, at the connection between the wiring 22 and the terminal 24, the wiring 22 is bent at a predetermined curvature so as to eliminate the stress applied to the connection.

According to the intake system control apparatus for an internal combustion engine of the first embodiment configured as described above, the wiring 22 and the terminal 24 are integrated with the outer wall 20 of the intake system component, and the outer wall 20 includes a plurality of sensors. Or, when the control device 21 such as an actuator is installed, as shown in FIG. 1B, the connector 25 is multipolarized, and the respective wirings 22 from the respective control devices 21 are integrated into one connector 25,
By connecting to other parts, the connection work in the final step is facilitated, erroneous connection caused by individually connecting a large number of connectors can be avoided, reliability can be improved, and the control device 21 can be improved. When a failure occurs, the terminal can be separated from the terminal 21a in the same manner as in the prior art, so that the control device 21 can be replaced.

Embodiment 2 FIG. 2 and 3 show the configuration of the second embodiment of the present invention. FIG. 2 shows a case where the outer wall 20 of the intake system component is formed by resin molding. The outer wall 20 has a double structure of an inner wall portion 20a on the intake air passage side and an outer wall portion 20b on the outside air side. Is held between the inner wall 20a and the outer wall 20b, and the terminal 2
4 is insert-molded on the outer wall 20b, and the connector 25 is formed integrally with the outer wall 20b. This configuration can be obtained, for example, by connecting the wiring 22 to the terminal 24 by crimping or soldering, and by double-molding the outer wall 20b on the inner wall 20a so as to cover the wiring 22. FIG. 3 shows the outer wall 20 of the intake system components.
Is made of metal, a recess 20e is formed in the outer wall 20, and the wiring 22 is housed in the recess 20e and fixed by the resin 36. According to this configuration, the wiring 22 is connected to the outer wall 20.
Since the structure is protected and fixed by b or the resin 36 and embedded in the outer wall 20, high reliability against external force can be obtained, and wiring and connection work can be facilitated similarly to the first embodiment. You can do it.

Embodiment 3 FIG. 4 shows a configuration of the third embodiment of the present invention, and FIG. 5 shows a configuration of a terminal according to the third embodiment. In this embodiment, the wiring 27 is connected to the inner wall portion 20a and the outer wall portion 20 similarly to the second embodiment.
b, and an electric wire having no insulation coating, such as a bare stranded wire, is used as the wiring 27.
As shown in the plan view of FIG. 5A and the cross-sectional view of FIG. 5B, a plurality are formed and held on the substrate 28, and the wiring 27 is connected to the connection portion 24b provided on the substrate 28 through the notch 24a. It is configured as follows. Also, the substrate 28
Is held by molding the outer wall portion 20b, and the connection portion with the wiring 27 is protected and fixed by the resin 26. Wiring 27
Is protected and fixed by the outer wall 20b, the cost can be reduced by using an electric wire having no insulation coating such as a bare stranded wire, and the terminal 24 is integrally formed by the substrate 28, and the connecting portion 24b is formed on the substrate 28. Since it is provided, the connection with the wiring 27 can be selected by a method most suitable for the configuration, such as soldering, welding, wire bonding, etc., and the productivity can be improved.

Embodiment 4 FIG. 6 shows a configuration of the fourth embodiment of the present invention.
To the inner wall 20a on the intake air passage side and the outer wall 2 on the outside air side.
0b, and a control device 21 for controlling the intake of a sensor or an actuator is attached to the inner wall portion 20a, and the outer wall portion 20b is connected together with the wiring 27 and the terminal 24.
And the connector 25 is molded together with the outer wall portion 20b. In this configuration, since the control device 21 for intake control is integrally formed with the intake system components together with the wiring 27, the number of components to be assembled at the time of assembling the internal combustion engine is reduced, so that the assembling and wiring become easy, and This has the effect that the function check can be performed comprehensively.

Embodiment 5 FIG. 7 shows a configuration of a fifth embodiment of the present invention, and FIGS. 8 and 9 show a mounting structure of an interface circuit in the fifth embodiment and later-described sixth and seventh embodiments. In this embodiment, a control device 21 for controlling the intake of a sensor or an actuator, and an interface circuit 29 comprising a sensing circuit for the sensor or a drive circuit for the actuator are provided on the inner wall constituting the outer wall 20 of the intake system component. Outer wall portion 20b which is attached to the portion 20a and is double-molded together with the wiring 27 and the terminal 24.
, And the connector 25 is formed together with the outer wall portion 20b. In the mounting structure of the interface circuit 29 shown in FIG.
Is mounted on the slit 20c of the inner wall portion 20a, and the periphery other than the mounting portion is covered with the gelling resin 30 to be electrically and mechanically protected. Further, in the configuration of FIG.
Is adhered and fixed to the bottom surface of the concave portion of the inner wall portion 20a with a resin 35, and the periphery other than the adhered portion is protected by the gelling resin 30.

In the fifth embodiment configured as described above, the number of parts to be assembled to the internal combustion engine can be reduced, wiring can be simplified, and the interface circuit 2 can be used.
Since 9 is provided in the vicinity of the control device 21, comprehensive function confirmation with the control device 21 can be performed more efficiently. Further, by integrating the interface circuit 29 with the components of the intake system, the configuration of the control unit 10 can be simplified and reduced in size as shown in FIG. The protection by the gelling resin 30 is not limited to the interface circuit 29. The outer structure of the control device 21, which is usually packaged with a molding material, is omitted, and is covered with the gelling resin. The mechanical protection also enables the productivity of the control device 21 to be improved.

Embodiment 6 FIG. 11 shows a configuration of the sixth embodiment of the present invention. In the sixth embodiment, a control device 21 for controlling the intake of a sensor or an actuator, and an interface circuit 29 including a sensing circuit for the sensor or a drive circuit for the actuator include an inner wall portion forming the outer wall 20 of the intake system component. 20a, together with the wiring 27 and the terminal 24, so as to be covered by a double-molded outer wall portion 20b. Further, the connector 25 is formed together with the outer wall portion 20b. And 32 are provided, and the heat sink 31,
In addition, the end surface of 32 is exposed to the outside of the outer wall portion 20b. With this configuration,
When the control device 21 is an actuator and generates a large amount of heat, the control device 21 can effectively dissipate heat from the heat generating components of the interface circuit 29. The heat sink 31,
Further, if the end face of 32 is exposed on the side of the intake air passage of the inner wall portion 20a, the heat radiation effect can be further enhanced.

Embodiment 7 FIG. 12 is an explanatory diagram showing a configuration of the seventh embodiment of the present invention. Embodiment 7
In the first embodiment, a control device 21 for intake control, which is composed of a sensor or an actuator, and a sensing circuit for a sensor or a drive circuit for an actuator are provided on an inner wall portion 20a of an outer wall 20 of an intake system component formed by double molding. The outer wall 20b is provided with an interface circuit 29 comprising a control unit 10 for controlling the interface circuit 29 and the control device 21, the interface circuit 29, and the wiring 27 connecting the interface circuit and the control unit 10. Is molded. Further, the outer wall portion 20b integrally forms a side wall 20d that forms a housing space for the control unit 10, and fixes a terminal 34 for connecting the wiring 27 and the control unit 10 and a terminal 24 for external exit, Further, a connector 25 for connecting the terminal 24 is integrally formed. The control unit 10 is connected to each of the terminals 24 and 34 by, for example, wire bonding or the like.
3 protected.

In the intake system control apparatus for an internal combustion engine according to the seventh embodiment, a control device 21 composed of sensors or actuators is mounted on a wall 20 such as a throttle body which is an intake system component. At least a part, the control unit 10, and the wiring 27 between them.
And the integrated construction of the two components reduces the number of assembly steps in the final process, has the effect of enabling a comprehensive inspection of control system components in advance, and has the effect of reducing the number of wire harnesses and simplifying the connection work. And reliability can be improved. When a part of the sensing circuit and the driving circuit is configured as the interface circuit 29 as in this embodiment, the control unit 10 is downsized and the number of connection circuits is reduced as in the fifth embodiment. And can be easily integrated with the intake system components.

[0020]

As described above, according to the intake system control apparatus for an internal combustion engine according to the present invention, at least a part of sensors and actuators constituting an intake system control device and at least a part of a control unit are provided. And at least a part of the wiring connecting between them and other parts are integrally assembled with the intake system component, so that the number of steps in the final assembly process can be reduced, and in particular, the wiring can be simplified. In addition to being able to improve reliability and simplify handling by simplifying the configuration of the wire harness, the integrated configuration allows for comprehensive functional inspection and reduced production costs. Thus, an intake control device for an internal combustion engine can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram and a plan view showing a configuration of a first embodiment of the present invention.

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

FIG. 3 is a sectional view showing an example of Embodiment 2 of the present invention.

FIG. 4 is an explanatory diagram showing a configuration of a third embodiment of the present invention.

FIG. 5 is a plan view and a sectional view of a terminal part according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a configuration of a fifth embodiment of the present invention.

FIG. 8 is a mounting structure diagram of the interface circuit of the present invention.

FIG. 9 is a mounting structure diagram of the interface circuit of the present invention.

FIG. 10 is a system diagram of an intake control component according to a fifth embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a configuration of a sixth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a configuration of a seventh embodiment of the present invention.

FIG. 13 is a system diagram of a conventional intake control component.

FIG. 14 is an explanatory diagram showing a mounting location of an intake control component.

[Explanation of symbols]

10 control unit, 20 outer wall of intake system component, 2
0a inner wall, 20b outer wall, 20d side wall, 21
Control equipment, 22, 27 wiring, 24 terminals, 25
Connector, 29 interface circuit, 30 gelled resin, 31, 32 heat sink, 33 cover.

Claims (12)

[Claims] An intake system control device for an internal combustion engine configured to control an intake system of an internal combustion engine having a plurality of components, wherein sensors for detecting an operating condition, a temperature condition, and the like, and detection of the sensors are provided. Actuators for controlling the intake air amount and the fuel supply amount, and a control unit for driving the actuators by inputting and calculating the detection outputs of the sensors, and transmitting signals and drive power by connecting them. An intake system control for an internal combustion engine, comprising: a control device having wiring and a terminal for connecting to another device, wherein at least a part of the control device is integrally formed with the intake system component. apparatus. 2. The intake system control device for an internal combustion engine according to claim 1, wherein the control device integrated with the intake system components is at least a part of wiring. 3. The intake system control device for an internal combustion engine according to claim 1, wherein the control device integrated with the components of the intake system is at least a part of sensors, actuators, and wiring. 4. The control device according to claim 1, wherein the control device integrated with the components of the intake system is at least a part of sensors, actuators, and wiring, and a part of a control unit. An intake system control device for an internal combustion engine. 5. The internal combustion engine according to claim 1, wherein the control device integrated with the components of the intake system is at least a part of sensors, actuators, and wiring, and a control unit. Intake system control device. 6. The wiring according to claim 1, wherein the wiring integrated with the intake system component is embedded in a wall surface of the intake system component. An intake system control device for an internal combustion engine. 7. The intake system control device for an internal combustion engine according to claim 6, wherein the wiring is constituted by a bare stranded wire. 8. The terminal according to claim 1, wherein the terminal connected to the wiring integrated with the intake system component is formed on a wall surface of the intake system component. An intake system control device for an internal combustion engine according to the above. 9. The intake system of an internal combustion engine according to claim 8, wherein the wiring is connected to the terminal by any of crimping, soldering, welding, or wire bonding after penetrating the notch of the terminal. Control device. 10. The intake system control device for an internal combustion engine according to claim 8, wherein the wiring is bent near the terminal between the holding member and the terminal. 11. The intake system component, wherein sensors, actuators, and a control unit integrated with the intake system component are fixed to the intake system component, and a portion other than the fixing portion is covered with a gelling resin. An intake system control device for an internal combustion engine according to any one of claims 3, 4, and 5. 12. A radiator plate is provided for sensors, actuators, and a control unit integrated with an intake system component,
6. The intake system control device for an internal combustion engine according to claim 1, wherein the heat radiating plate is configured to be exposed to outside air or an intake air passage.