JP2002168156A - Injector module, injector electrical block body used for it, and injector body part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injector module excellent in mounting workability for an engine body side and in waterproofness. SOLUTION: An electromagnetic coil part 25 and a wiring body 26 for wiring each electromagnetic coil part 25 are incorporated in an injector electrical block body 20 to which each injector body part storage hole 21h penetrates corresponding to each injector mounting hole Eh on the engine body side E. Inside each injector body part storage hole 21h, an injector body part 30 having a valve part 35 is inserted and arranged for opening/closing the valve part 35 by exciting/non-exciting each electromagnetic coil part 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injector module used for an internal combustion engine of an automobile or the like, an injector electrical block used therefor, and an injector body.

[0002]

2. Description of the Related Art Conventionally, an injector for injecting fuel toward each combustion chamber of an internal combustion engine generally has a structure in which a needle valve and an electromagnetic coil for electromagnetically opening and closing the needle valve are integrated. It is said. A fuel injection hole side end of each injector is inserted into each injector mounting hole on the engine head side, and a delivery pipe is attached to a fuel inlet side end of each injector, and the delivery pipe is bolted to the engine head side. By fixing the injectors and the like, the respective injectors are installed and fixed so as to be sandwiched between the engine head and the delivery pipe.

[0003] In addition, each of the injectors installed and fixed in this manner is connected to a respective end of a harness for supplying an exciting current to each electromagnetic coil via a connector.

[0004]

However, in the above-described injector, it is necessary to connect a connector at an end of a harness to each injector in the vicinity of the engine head. There is a problem that workability is poor.

Further, since a harness made of a bundle of electric wires is used as a wiring member between the engine control unit and each injector and a connector is connected between each end of each harness and each injector, there is also a problem that the weight is very heavy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an injector module which is excellent in workability in assembling to an engine main body side and which can be reduced in weight, an injector electric component block body used for the injector module, and an injector main body. It is in.

[0007]

Means for Solving the Problems In order to solve the above problems,
The invention according to claim 1 is an injector module in which a plurality of injectors are provided corresponding to each combustion chamber of the engine, and a fuel injection control of each of the injectors is performed by an engine control unit. An electromagnetic coil portion is built into an injector frame body in which an injector body receiving hole is provided at each position corresponding to each injector mounting hole so as to be wound around the inner peripheral portion of each injector body receiving hole. And an injector electrical block body in which a wiring body for wiring to each of the electromagnetic coil portions is built, a valve portion formed in a substantially columnar shape, and adjusting fuel injection timing from a fuel injection hole, and a valve. A columnar part which is linearly connected to the part and feeds fuel supplied from a fuel inlet to the valve part, and opens and closes the valve part An injector body having a movable magnetic body that is biased toward freely in and the closed position reciprocates between a predetermined open position and a predetermined closed position that,
Wherein each of the injector main bodies moves to the open position against the urging force by excitation of each of the electromagnetic coil sections, and the movable magnetic body by non-excitation of each of the electromagnetic coil sections. Are inserted and arranged in the respective injector main body accommodation holes in a posture movable to the closed position by the urging force.

According to a second aspect of the present invention, a fixed core portion is provided so as to be located at the center of the electromagnetic coil portion, and the movable magnetic body is provided on an extension of the fixed core portion. An auxiliary core portion is provided around an outer peripheral portion of the movable magnetic body, and an outer peripheral core portion is provided around an outer peripheral portion of each of the electromagnetic coil portions. It is preferable to form a magnetic circuit that reaches the fixed core portion again through the movable magnetic body, the auxiliary core portion, and the outer peripheral core portion.

Further, a non-magnetic material may be provided between the fixed core portion and the outer peripheral core portion.

Further, in accordance with a fourth aspect of the present invention, instead of, or in addition to, an outer peripheral core portion disposed around an outer peripheral portion of each of the electromagnetic coil portions, each of the injector main body receiving holes of the injector frame body is provided. A core circuit between injectors may be provided between the cores, and a magnetic circuit may be formed in which a magnetic flux generated by energization of each of the electromagnetic coil units passes through the adjacent core between injectors.

Further, the injector electrical block may be integrated with a delivery pipe.

Further, a press contact terminal is connected to a winding end of the electromagnetic coil section, and a coated single core wire is used as the wiring body, and the end is connected to the press contact terminal. A pressure connection may be used.

In the injector electric block according to the present invention, a plurality of injectors are provided corresponding to each combustion chamber of the engine, and the fuel injection control of each injector is performed by an engine control unit. An injector frame body in which an injector body receiving hole is provided at each position corresponding to each injector mounting hole on the engine body side, and an inner peripheral portion of each injector body receiving hole. It is arranged to be wound around,
An electromagnetic coil section for electromagnetically opening and closing a valve section of the injector body section inserted and disposed in each of the injector body section accommodating holes, and a wiring for each of the electromagnetic coil sections incorporated in the injector frame body. And a wiring body.

In the injector body according to the present invention, a plurality of injectors are provided corresponding to respective combustion chambers of the engine, and a fuel injection control of each injector is performed by an engine control unit. An injector main body, which is formed in a substantially columnar shape having a fuel inlet formed at one end and a fuel injection hole formed at the other end, provided on the fuel injection hole side, and supplied through the fuel inlet. A valve unit for adjusting the injection timing of the fuel to be injected, and a reciprocating movable between a predetermined open position for opening and closing the valve unit and a predetermined closed position and biased toward the closed position, and an injector electrical block. When the electromagnetic coil provided on the body side of the injector mounting hole is excited, the valve moves to the open position against the urging force to open the valve. Those having a movable magnetic body.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an injector module according to an embodiment of the present invention will be described.

As shown in FIG. 1, this injector module controls the fuel injection of a plurality of injector sections 10 provided for each combustion chamber of the engine by an engine control unit (such as one called an EFI-ECU) 1. In the engine control system described above, the coil section and the valve section of each injector section 10 are separated from each other, and the wiring structure to each coil section is integrated with each coil section.

Incidentally, the engine control unit 1
Are connected to each injector unit 10 via an input / output unit 1a, and are provided with various sensors, a power supply system such as a battery, a junction block in a vehicle compartment, and the like provided on the engine body side via the input / output units 1b to 1d. Parts, and
The injector unit 10 is connected to each of the ignition coil devices and based on various detection signals from the various sensors and the like.
Controls the fuel injection timing and the like. In this embodiment, since a four-cylinder engine is assumed, the configuration is provided with four injector units 10, but this number is appropriately changed according to the number of cylinders of the engine.

As shown in FIGS. 2 to 5, the injector module includes an injector electrical component block 20 in which an electromagnetic coil portion of the injector portion 10 and a wiring structure to each electromagnetic coil portion are integrated, a valve of the injector portion 10 And a plurality of injector main bodies 30 each having a portion.

The injector electrical block 20 includes:
Each of the injector body receiving holes 21h is wound around an inner peripheral portion of the injector body receiving hole 21h on an injector frame body 21 having an injector body receiving hole 21h penetrating therethrough at each position corresponding to each injector mounting hole Eh on the engine body E side. Thus, the electromagnetic coil unit 25 is built in, and a wiring body 26 for wiring to each of the electromagnetic coil units 25 is built in.

More specifically, the injector frame body 21 is formed of a non-magnetic and insulating material such as an insulating resin. In the present embodiment, the injector frame body 21 has a substantially rectangular plate shape in plan view. A plurality of substantially columnar projecting columnar portions 21b corresponding to each injector mounting hole Eh are provided on the lower surface side of 21a.
Has a protruding shape.

Also, each injector body receiving hole 21h
Is the protruding columnar portion 2 of the injector frame body 21.
1b is formed in a vertically penetrating shape at a portion where the columnar portion 31 of the injector body 30 described later is formed.
Is formed in a small-diameter portion 21ha through which the auxiliary core portion 41 of the injector main body 30 described later can be accommodated and arranged.
The injector main body 30 can be inserted and arranged from below each injector main body accommodation hole 21h.

Each of the electromagnetic coil units 25 is provided with a bobbin 25.
b. An electric wire with an insulating coating such as an enameled wire is wound around b to form a donut shape having an inside diameter substantially the same as or slightly larger than the inside diameter of the small-diameter portion 21ha. It is disposed in a buried manner so as to surround the inner peripheral portion of the small-diameter portion 21ha around the large-diameter portion 21hb. That is, each of the electromagnetic coil portions 25 is disposed so as to be wound around the inner peripheral portion of each of the injector main body housing holes 21h. When a current flows through each of the electromagnetic coil portions 25, a magnetic flux generated by the current is generated. Penetrates at least a movable magnetic body 34 (described later) of the injector body 30 to be disposed in the injector body housing hole 21 h, and pulls the movable magnetic body 34 toward the inside of the electromagnetic coil 25. It is configured to approach.

The wiring body 26 includes four power supply wiring bodies 26a for individually supplying power to the respective electromagnetic coil sections 25 and a common ground wiring body 26b for the respective electromagnetic coil sections 25. The bus bar is formed of a conductive material such as a metal in a narrow band shape, and a bare round conductor having a substantially circular cross section is formed. Each power supply wiring body 26a and ground wiring body 26b
Are embedded in the plate-like portion 21a of the injector frame body 21 by insert molding (mold molding) or the like in a predetermined wiring pattern.
A terminal terminal attached to the end of the winding drawn out from each of the electromagnetic coil portions 25 in the vicinity of the corresponding electromagnetic coil portion 25 is provided at one end of the ground wiring body 26b at one end of the ground wiring body 26b. Are electrically connected by welding. Since the wiring body 26 is buried in the injector frame body 21 together with the respective electromagnetic coil parts 25 by insert molding or the like, the wiring body 26 and the respective electromagnetic coil parts 25 can be disposed without employing a special waterproof structure. Sufficient waterproofing is achieved.

A connector housing 22 is formed at one end of the injector frame 21, and the power supply wirings 26 are provided in the connector housing 22.
a and the other end of the ground wiring body 26b are arranged so as to protrude as connector terminals to form the connector portion 23. Then, by connecting a connector at the end of a wire harness (not shown) drawn from the engine control unit 1 to the connector portion 23, each electromagnetic coil portion 25 and the engine control unit 1 are electrically connected, The energization and non-excitation of each electromagnetic coil unit 25 are controlled by energizing and de-energizing the fuel injection control current from the engine control unit 1.

A mounting piece 29 having a mounting hole 29h is protruded from one side of the injector electrical block 20 as a mounting member for mounting and fixing to the engine body E side. Then, a bolt or the like inserted into the mounting hole 29h of the mounting piece 29 is screwed and fastened to a screw hole on the engine main body E side, so that each injector main body housing hole 21h is formed.
With each injector body 30 inserted and arranged in
The injector electrical component block body 20 is mounted and fixed to the engine body E in a predetermined posture.

Each injector body 30 is formed in a substantially columnar shape, and has a valve portion 35, a columnar portion 31 linearly connected to the valve portion 35, and movable in conjunction with the opening and closing operation of the valve portion 35. And a movable magnetic body 34.

The columnar portion 31 is substantially cylindrical, and has a fuel inlet 31h formed at the upper end thereof, and a fuel passage 31p penetrating in the axial direction therein. The fuel inlet side end of the columnar portion 31 is formed so as to be insertable and connectable to the fuel supply port 51 on the delivery pipe 50 side, and the fuel passing through the delivery pipe 50 branches off at the fuel supply port 51, and the fuel inlet 31h Is supplied to the valve section 35 through the fuel passage 31p. An O-ring O1 made of rubber or the like is interposed between the upper outer peripheral surface of the columnar portion 31 and the inner peripheral surface of the fuel supply port 51 by compression, and passes between the upper outer peripheral surface of the columnar portion 31 and the inner peripheral surface of the fuel supply port 51. Fuel leakage and the like are prevented.

The valve section 35 is connected to the lower end of the column 31 to adjust the injection timing of the fuel supplied through the column 31. A fuel injection hole 35h is provided at the lower end of the valve 35. It is formed. The end of the valve portion 35 on the side of the fuel injection hole 35h is formed so as to be insertable and connectable to the injector mounting hole Eh on the engine body E side, so that the fuel injected from the fuel injection hole 35h passes through the intake manifold, and It is configured to be supplied to the combustion chamber on the E side. The outer peripheral surface of the valve portion 35 and the fuel injection holes 3
An O-ring O2 made of rubber or the like is interposed between the inner peripheral surfaces of 5h by compression to prevent water from entering the combustion chamber passing between them.

More specifically, the valve portion 35 has a tapered nozzle body 37 provided in a cylindrical portion 36 opening downward, and a spherical valve body 38 provided at the tip end of the nozzle body 37.
Is arranged. The spherical valve body 38 is formed in a spherical body capable of closing the opening on the distal end side of the nozzle body 37, and is fixedly supported at a position on the distal end side in the tubular portion 36 by supporting means (not shown). In addition, the nozzle body 37 is provided at the back inside the cylindrical portion 36.
A predetermined advance position (see FIG. 4) in which the distal end opening is pressed against the spherical valve body 38 to close the opening (see FIG. 4), and a predetermined evacuation position (see FIG. 5) can be moved forward and backward. The fuel path 3 communicating with the fuel path 31p is provided in the reciprocating support portion 39.
9p is formed, and the fuel supplied through the fuel passage 31p is sent into the nozzle body 37 and can be injected from the tip side of the nozzle body 37. At this time, if the nozzle body 37 has advanced to the advanced position, the nozzle body 37
Is closed by the spherical valve body 38 and the fuel injection from the nozzle body 37 is stopped. On the other hand, when the nozzle body 37 is retreating to the retreat position, the front end opening of the nozzle body 37 is opened. And the fuel is injected from the nozzle body 37.

The movable magnetic body 34 is made of a magnetic material such as silicon steel, and has a predetermined closed position P1 (see FIG. 4) for opening and closing the valve portion 35 and a predetermined open position P2.
(See FIG. 5), and is configured to be reciprocally movable and biased toward the closed position P1.

More specifically, a movable magnetic body 34 is fixed to the base end of the nozzle body 37 in the valve section 35, and the nozzle body 37 is moved in conjunction with the movement of the movable magnetic body 34 to the open position P2. Moves to the retracted position to open the valve section 35 (see FIG. 4), and in conjunction with the movement of the movable magnetic body 34 to the closed position P1, the nozzle body 37 moves to the advanced position to close the valve section 35. (See FIG. 5). The movable magnetic body 34
The movable magnetic body 34 and the nozzle body 37 may be interlocked by connecting the movable magnetic body 34 and the nozzle body 37 by a predetermined connection mechanism while disposing the movable magnetic body 34 in a reciprocating manner outside the valve unit 35. .

A coil spring 40 as urging means is interposed between the columnar portion 31 and the nozzle body 37 in a compressed state on the advanceable / retractable support portion 39.
4 is biased toward the closed position P1.

Further, each injector main body 30 is moved by the excitation of each electromagnetic coil 25 to move the movable magnetic body 34 to the open position P2 against the urging force of the coil spring 40, and is movable by the non-excitation of the electromagnetic coil 25. The magnetic body 34 is configured to be able to be inserted and arranged in each injector main body housing hole 21h in such a manner that the magnetic body 34 can move to the closed position P1 by the urging force of the coil spring 40.

That is, in the present injector module, as will be described in detail later, when assembled to the engine body E side, the columnar portion 31 is disposed in the small diameter portion 21ha and the valve portion 35 is connected to the large diameter portion 21hb. To be installed in
By inserting each injector body 30 into the injector body housing hole 21h (see FIGS. 4 and 5), each injector 10 is assembled. At this time, since the valve section 35 is disposed at a position deviated downward along the axial direction from the inside of the electromagnetic coil section 25, the movable magnetic body 34 in the valve section 35 also moves from the inside of the electromagnetic coil section 25. It is disposed at a position deviated downward along the axial direction. Accordingly, when the electromagnetic coil unit 25 is excited by energization in a state where the movable magnetic body 34 is urged to the closed position P1, the magnetic flux generated thereby passes through the inside of the movable magnetic body 34, and 34 is drawn toward the inside of the electromagnetic coil portion 25 via the auxiliary core portion 41, that is, toward the open position P2. Further, in this state, when the power supply to the electromagnetic coil section 25 is cut off and the state is de-energized, the movable magnetic body 34 moves toward the closed position P1 by the urging force of the coil spring 40.

With the above-described configuration, in principle, the valve section 35 is excited by the excitation and non-excitation of the electromagnetic coil section 25.
This embodiment employs the following configuration in order to more reliably open and close the valve section 35.

That is, as shown in FIGS. 4 and 5, a fixed core portion 32 made of a magnetic material is disposed in each injector portion 10 so as to be located at the center of the electromagnetic coil portion 25. The movable magnetic body 34 is disposed on the lower end side of the core portion 32, an auxiliary core portion 41 made of a magnetic material is disposed around the outer peripheral portion of the movable magnetic body 34, and further, around the outer peripheral portion of the electromagnetic coil portion 25. An outer core 27 made of a magnetic material is disposed on the outer peripheral surface. A magnetic flux generated when the electromagnetic coil 25 is energized is moved from the fixed core 32 to the movable magnetic body 34, the auxiliary core 41, and the outer core 27. A magnetic circuit is sequentially formed to reach the fixed core portion 32 again.

More specifically, each injector body 3
0, a columnar fixed core portion 32 is built in the columnar portion 31 so as to extend along the central axis of the electromagnetic coil portion 25,
The fuel passage 31p extends along the central axis of the fixed core portion 32.
Is formed. Further, an annular auxiliary core portion 41 is provided around the outer peripheral portion of the cylindrical portion 36 of the valve portion 35.

Further, each injector body accommodation hole 21
h, a cylindrical outer core 27 made of a magnetic material such as an iron plate is provided around the inner periphery of the injector body housing hole 21 h around the outer periphery of the electromagnetic coil unit 25 and outside the upper and lower ends of the electromagnetic coil unit 25. We are going to arrange.

As a result, the magnetic flux generated by the excitation of the electromagnetic coil portion 25 is transferred from the lower end of the fixed core portion 32 to the outer core portion 27 from the movable magnetic body 34 via the auxiliary core portion 41.
From the lower end to the upper end, and again the fixed core 3
2 will be formed.

A non-magnetic member 28 is provided between the fixed core portion 32 and the outer peripheral core portion 27. The non-magnetic material 28 is formed of a non-magnetic material such as austenitic steel or martensitic steel, and prevents a time-coupling state between the fixed core portion 32 and the outer peripheral core portion 27, and The magnetic flux from the section 32 is prevented from directly entering the auxiliary core section 41 without passing through the movable magnetic body 34.

More specifically, the non-magnetic member 28 is formed in a substantially annular shape, and is attached to the upper end surface side of the outer peripheral core portion 27 so as to surround the upper end portion of the cylindrical portion 36 of the valve portion 35. Configuration.

In the present embodiment, the ring-shaped auxiliary core portion 41 is turned off after the power supply to the electromagnetic coil portion 25 is cut off.
It also has the function of eliminating the situation where the movable magnetic body 34 is kept attracted upward due to residual magnetism.

In the present injector module, the injector electrical block 20 and the injector main body 3 are moved so that each movable magnetic body 34 is moved to the open position P2 by the magnetic action caused by the excitation of each electromagnetic coil section 25.
0, it is sufficient to insert each injector main body 30 into the injector main body accommodation hole 21h of the injector electrical block body 20 without fixing the outer peripheral shape of each injector main body 30. Is slightly smaller than the inner peripheral shape of the injector main body housing hole 21h, and a predetermined slight gap (for example, between the outer peripheral part of each injector main body part 30 and the inner peripheral part of each injector main body housing hole 21h) 0.5 mm), each injector main body 30 is inserted into each injector main body accommodation hole 21h.
It is arranged to be housed inside. The injector body 30 has a portion where the injector mounting hole Eh is formed on the engine body E side and the delivery pipe 50.
The injector electrical block 20 is fixed to the engine body E via a mounting piece 29. This allows
The tolerance of the manufacturing dimensions required for each injector body 30, the injector electrical block 20, and the like is increased, and after assembly to the engine body E, the injector electrical block 20 and each injector body 30 are assembled. The allowable range for the heat shrinkage occurring at the time is increased.

Next, a procedure for assembling the injector module to the engine body E will be described.

First, the valve section 35 of each injector body 30 is connected to each injector mounting hole Eh on the engine body E side.
Insert connection. Next, the columnar portion 31 is disposed in the small-diameter portion 21ha and the valve portion 35 is disposed in 21hb, so that each of the injector main bodies 30 is connected to each of the injector main body accommodation holes 21 of the injector electrical block unit 20.
h. Then, in this state, the mounting piece 29
When the injector electrical block 20 is attached and fixed to the engine main body E via the injector body 30, each injector main body 30 is held in a state of being inserted and arranged in each injector main body housing hole 21h, and each injector main body 10 is assembled. , The injector module is mounted on the engine body E side.

Thereafter, the upper end of the column 31 of each injector main body 30 projecting above each injector main body accommodation hole 21h of the injector electrical equipment block 20 is connected to the fuel supply port 51 on the delivery pipe 50 side. Each is inserted and connected.

The operation of the injector module thus assembled will be described.

First, when the engine is not operating, the supply of fuel to the delivery pipe 50 is stopped, the power supply to each electromagnetic coil 25 is cut off, and the movable magnetic body 34 is positioned at the closed position P1. The valve section 35 is in a closed state (see FIG. 4).

When the engine is started, the fuel supply to the delivery pipe 50 is started by a fuel pump (not shown), and the fuel injection control current from the engine control unit 1 is supplied to each injector 10. Then, the energization and non-excitation of each electromagnetic coil unit 25 are controlled by shutting off the energization, and the fuel injection from a predetermined valve unit 35 is controlled.

That is, focusing on the predetermined one injector section 10, when power is supplied to the electromagnetic coil section 25, the electromagnetic coil section 25 is excited, and the movable magnetic body 34 resists the urging force of the coil spring 40. To the open position P2, and the valve portion 35 is opened in conjunction with the position P2. This allows
The fuel sent into the delivery pipe 50 branches at the fuel supply port 51 and is sent to the injector body 30 side, and passes through the fuel passage 31p to the fuel injection hole 35 of the valve section 35.
h, and is supplied to the combustion chamber on the engine body E side via an intake manifold. Thereafter, when the power supply to the electromagnetic coil unit 25 is interrupted in the predetermined one injector unit 10, the electromagnetic coil unit 25
Is in a non-excited state, and the movable magnetic body 34 is
The valve unit 35 is moved to the closed position P1 by the urging force of 0, and in conjunction with this, the valve unit 35 is closed, and the fuel supply to the combustion chamber is stopped.

According to the injector module configured as described above, the injector frame body 2 in which the injector body receiving holes 21h are provided at the positions corresponding to the injector mounting holes Eh on the engine body E side, respectively.
1, an electromagnetic coil portion 25 is built-in so as to be wound around the inner peripheral portion of each injector body portion accommodating hole 21h, and a wiring body 26 for wiring to each of the electromagnetic coil portions 25 is provided.
, A valve section 35 formed in a substantially columnar shape and adjusting fuel injection timing from a fuel injection hole 35h, and a fuel inlet 31h linearly connected to the valve section 35 and linearly connected to the valve section 35. A columnar portion 31 for feeding the supplied fuel to the valve portion 35;
An injector body 30 having a movable magnetic body 34 that is reciprocally movable between a predetermined open position P2 and a predetermined closed position P1 that opens and closes and that is biased toward the closed position P1;
Each of the injector main bodies 30 is moved to the open position P2 against the urging force by the excitation of each of the electromagnetic coil sections 25, and the movable magnetic substance 34 is moved by the non-excitation of each of the electromagnetic coil sections 25. Is inserted into each injector main body housing hole 21h in a posture movable to the closed position P1 by the urging force, so that each of the injectors has one harness end near the engine main body in the conventional manner. There is no need to connect connectors, and therefore the engine body E
Excellent workability in assembling to the side and waterproof performance.

Further, since a harness made of a bundle of electric wires is used as a wiring member between the engine control unit and each injector as in the prior art, and a connector is not connected between each end of each harness and each injector, the weight is reduced. It is also possible.

Further, a fixed core portion 32 is provided so as to be located at the center of the electromagnetic coil portion 25, and a movable magnetic body 34 is provided on an extension of the fixed core portion 32.
The auxiliary core portion 41 is disposed around the outer peripheral portion of the electromagnetic coil portion 25, and the outer peripheral core portion 27 is disposed around the outer peripheral portion of each electromagnetic coil portion 25.
When a magnetic circuit is formed from the second through the movable magnetic body 34, the auxiliary core section 41, and the outer core section 27 to the fixed core section 32 again, the magnetic flux density in the movable magnetic body 34 increases, and the movable magnetic body 34 is movable with a larger force. The magnetic body 34 can be drawn to the open position P2, and the opening and closing operation can be performed more reliably.

Further, the fixed core portion 32 and the outer core portion 27
Since the nonmagnetic material 28 is interposed between the fixed core portion 32
Of the magnetic coil portion 25 can be prevented from directly entering the auxiliary core portion 41 without passing through the movable magnetic body 34, so that more magnetic flux can pass through the movable magnetic body 34 and the magnetic coil portion 25 The movable magnetic body 34 can be moved to the open position P2 by excitation.

As shown in FIG. 6, instead of the outer core 27 disposed around the outer periphery of each electromagnetic coil 25,
Alternatively, in addition, the inter-injector core portions 48 are disposed between the respective injector main body receiving holes 21h of the injector frame body 21 so that the magnetic flux generated by the energization of the electromagnetic coil portions 25 is adjacent to the inter-injector core. A magnetic circuit passing through the portion 48 may be formed.

More specifically, a columnar member made of a magnetic material (a bolt or the like can be used) is provided between the injector body receiving holes 21h on the lower surface side of the injector frame body 21 of the injector electrical component block 20. The inter-injector core portions 48 are provided, and the extended core portions 49 such as iron plates are formed from the base end and the front end of each of the inter-injector core portions 48 toward the upper and lower portions of the adjacent electromagnetic coil portion 25, respectively. It is extended. As a result, magnetic flux generated by energization of the electromagnetic coil unit 25 is transferred from the fixed core unit 32 to the movable magnetic body 34 and the auxiliary core unit 41, the lower extending core unit 49, the injector inter-core unit 48, and the upper extending unit. A magnetic circuit reaching the fixed core portion 32 again through the core portion 49 is formed, and the magnetic flux density in the movable magnetic body 34 is increased. Can be moved.

As shown in FIG. 7, the injector electrical block 20B may be integrated with the delivery pipe 50.

More specifically, the injector frame 21 and the delivery pipe 50 of the injector electrical component block 20B are connected to the injector body receiving holes 21h of the injector frame 21 and the fuel supply ports 51 of the delivery pipe 50, respectively. Can be connected to each other so as to be integrally formed of a heat-resistant resin or the like. The injector electrical block body 20B is the same as the injector electrical block body 20 except for the wiring layout of the wiring body 26B.
Is substantially the same as

As described above, when the injector electrical block 20B and the delivery pipe 50 are integrated, the assembly to the engine body E becomes easier.

As shown in the modified examples shown in FIGS. 8 to 10, a configuration in which each electromagnetic coil portion 25 and the wiring body 26C are connected to each other is as follows. A configuration may be employed in which the electromagnetic coil 25 is press-connected to the press-contact terminal 62 attached to the end of the winding 25a.

That is, this modified example will be described focusing on differences from the above-described embodiment. In this modified example, the injector electrical block 20 according to the above-described embodiment is described.
Instead of the following injector electrical component block 20
C is used.

In this injector electrical block 20C, each columnar portion 2Cb is provided on one side of a substantially columnar columnar portion 21Cb provided corresponding to each injector mounting hole Eh.
1Cb is connected to form a substantially rectangular plate-like plate-like portion 21.
An injector frame body 21C provided with Ca is provided. Each of the columnar portions 21Cb has the same components as those of the protruding columnar portion 21b in the above-described embodiment, and those having the same configuration as the injector body 30 described above are inserted and arranged therein. Are denoted by the same reference numerals and description thereof will be omitted.

In the plate-like portion 21Ca, a wiring body 26C
Are laid on the substrate 60 in a predetermined wiring pattern. The substrate 60 is formed in a substantially rectangular plate shape, and a plurality of convex portions 61 for supporting the wiring body 26C with the predetermined wiring pattern are formed on the outer surface thereof. Then, the wiring body 26C composed of the coated single core wire is held in the predetermined wiring pattern by being sandwiched between the convex portions.

Each columnar portion 2 of the lower edge of the substrate 60
At each position corresponding to 1 Cb, a pair of pressure contact terminals 6 are provided.
2 are provided.

Each of the press contact terminals 62 is formed of a conductive material such as a metal, and includes a press contact portion 63 that presses and holds the wiring body 26C and a winding connection portion to which the winding 25a of the electromagnetic coil portion 25 is connected. 64. The press contact portion 63 is connected to the substrate portion 6.
It is formed in a substantially U-shape with a pair of side plate portions 63b erected on both sides of the substrate 3a, and is attached to the substrate 60 such that the outer surface of the substrate portion 63a is in close contact with the lower edge of the outer surface of the substrate 60. . Further, a slit-shaped press-contact groove 63c capable of press-holding the wiring body 26C is formed in each side plate portion 63b, and the end of the wiring body 26C is press-fitted into the press-contact groove 63c from the opening side thereof, thereby forming the wiring body 26C. Is held so as to be pressed against the pressure contact portion 63. In addition, the winding connection portion 6
4 is formed in a strip shape extending from the substrate portion 63a of the press contact portion 63 to below the electromagnetic coil portion 25. Then, the winding 25a of the electromagnetic coil portion 25 is drawn out to the winding connection portion 64 and welded to the winding connection portion 64 by fusing or the like to be electrically connected.

Then, the wiring body 26C is laid in a predetermined wiring pattern on the substrate 60, and the end of the wiring body 26C is connected to the press-contact portion 6 of the press-contact terminal 62 provided at the lower edge of the substrate 60.
3 and the winding 2 of each electromagnetic coil section 25.
In a state where the ends of 5a are respectively connected to the winding connection portions 64 of the press contact terminals 62, the wiring body 26C and the substrate 60 are
Injector frame 2 together with electromagnetic coil 25 and the like
When insert molding is performed on 1C, an injector electrical component block body 20C is formed.

The injector electrical block 2
The one end of the plate-shaped portion 21Ca of the first wiring member 21C
A connector part 23C having a connector terminal electrically connected to the connector part 23C is formed, and a connector at the end of the wire harness drawn out from the engine control unit 1 is connectable to the connector part 23.

In this modification, the outer peripheral core 27
Is removed from the outer peripheral core portion 27C corresponding to the shape of the plate-shaped portion 21Ca, and the plate-shaped portion 21Ca
Are provided in the vicinity of the respective columnar portions 21Cb, thereby achieving a compact configuration. In addition, even if the outer peripheral core portion 27C in which one side portion is deleted is used, other outer peripheral core portions 27C can be used.
Since the magnetic circuit is formed at the portion C, there is no particular inconvenience.

Further, the injector electrical block 20C
Of the injector frame 21C of the delivery pipe 5
Although they are integrally formed at 0C, they may be separate bodies.

As in the present modification, a configuration is adopted in which a coated single-core wire is used as the wiring body 26C, and its end is press-connected to the press-contact terminal 62 attached to the end of the winding 25a of each electromagnetic coil unit 25. Thus, the wiring body 26C can be easily connected to the press contact terminal 62.

In this modification, the description has been made in the case where the wiring body 26C is built in the plate-like portion 21Ca provided on one side of each columnar portion 21Cb. The wiring body 26 may be incorporated in the plate-like portion 21a provided in the first embodiment.

Although each of the wiring bodies 26C is insert-molded in the plate-like portion 21Ca, the plate-like portion 21Ca is divided into a main body portion and a lid portion along the longitudinal direction. May be accommodated between them. In this case, a conductor with a coating may be used as the wiring body 26C.

[0073]

As described above, according to the injector module of the first aspect of the present invention, the injector frame in which the injector main body housing holes are respectively provided at the positions corresponding to the injector mounting holes on the engine main body side. An injector electrical component block body having a built-in electromagnetic coil portion wound around the inner peripheral portion of each injector body portion accommodating hole, and a built-in wiring body for wiring to each of the electromagnetic coil portions; A valve portion that is formed in a substantially columnar shape and adjusts the injection timing of fuel from the fuel injection hole;
A reciprocating movement between a columnar portion which is linearly connected to the valve portion and feeds fuel supplied from a fuel inlet to the valve portion, and a predetermined open position and a predetermined close position for opening and closing the valve portion. An injector body having a movable magnetic body freely and urged toward the closed position, wherein each of the injector main bodies is configured such that the movable magnetic body is attached to the movable magnetic body by excitation of the electromagnetic coil section. The movable magnetic body is moved into the open position against the force and is inserted into the injector main body housing holes in such a manner that the movable magnetic body can move to the closed position by the biasing force due to the non-excitation of the electromagnetic coil portions. Therefore, it is not necessary to connect the connector at the end of the harness to each injector in the vicinity of the engine body, as in the prior art. Also excellent.

Further, as in the prior art, a harness made of a bundle of electric wires is used as a wiring member between the engine control unit and each injector, and a connector is not connected between each end of each harness and each injector. It is also possible.

Further, as in claim 2, a fixed core portion is provided so as to be located at the center of the electromagnetic coil portion, and the movable magnetic body is provided on an extension of the fixed core portion. An auxiliary core portion is provided around an outer peripheral portion of the movable magnetic body, and an outer peripheral core portion is provided around an outer peripheral portion of each of the electromagnetic coil portions. When a magnetic circuit is formed again from the movable magnetic body, the auxiliary core portion, and the outer peripheral core portion to the fixed core portion, the magnetic flux density in the movable magnetic body increases, and the movable magnetic body is formed with a larger force. It can be pulled to the open position, and the opening and closing operation can be performed more reliably.

Further, when a non-magnetic material is interposed between the fixed core portion and the outer peripheral core portion as described in claim 3, the magnetic flux emitted from the fixed core portion is directly connected to the auxiliary core without passing through the movable magnetic material. Thus, more magnetic flux can pass through the movable magnetic body by preventing the movable magnetic body from moving into the open position by exciting the electromagnetic coil section.

Further, in place of or in addition to the outer peripheral core portion disposed around the outer peripheral portion of each of the electromagnetic coil portions, the respective injector main body receiving holes of the injector frame body may be provided. A core circuit between injectors is provided between the magnetic cores, and a magnetic circuit passing through the core between injectors adjacent to the magnetic flux generated by energization of the respective electromagnetic coil units increases the magnetic flux density in the movable magnetic body. As a result, the movable magnetic body can be pulled to the open position with a larger force, and the opening and closing operation can be performed more reliably.

Further, when the injector electric block is integrated with the delivery pipe as described in claim 5,
These can be more easily assembled to the engine body.

Further, according to a sixth aspect of the present invention, a press contact terminal is connected to a winding end of the electromagnetic coil portion, and a coated single core wire is used as the wiring body, and the end is press contacted to the press contact terminal. When connected, the wiring body can be easily connected to the press contact terminal.

According to the injector body of the present invention, a plurality of injectors are provided corresponding to each combustion chamber of the engine, and the fuel injection control of each injector is performed by an engine control unit. An injector electrical component block of an injector module, wherein an injector body receiving hole is provided at each position corresponding to each injector mounting hole on the engine body side, and the injector body receiving hole. An electromagnetic coil portion that is disposed so as to be wound around an inner peripheral portion and electromagnetically opens and closes a valve portion of the injector main body inserted and disposed in each of the injector main body housing holes; and the injector frame. A wiring body built in the body for wiring to each of the electromagnetic coil portions. Unlike the conventional case, it is not necessary to connect the connector at the end of the harness to each injector in the vicinity of the engine body, and therefore, the workability of assembling to the engine body side and the waterproof performance are excellent. At the same time, the weight of the connector can be reduced by eliminating the need for a connector or the like.

According to the injector body of the present invention, the fuel injection port is formed in a substantially columnar shape having a fuel inlet formed at one end and a fuel injection hole formed at the other end. A valve portion provided on the hole side, for adjusting the injection timing of the fuel supplied through the fuel inlet, and reciprocally movable between a predetermined open position and a predetermined closed position for opening and closing the valve portion; and A movable magnet that is biased toward the closed position and moves to the open position to open the valve portion against the biasing force by excitation of an electromagnetic coil portion provided on the injector mounting hole side of the injector electrical component block body. Body, so that it is not necessary to connect the connector at the end of the harness to each injector in the vicinity of the engine body, as in the prior art.
In addition to excellent workability in assembling to the engine body and waterproof performance, it is also possible to reduce the weight by eliminating the need for connectors and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of an engine control system.

FIG. 2 is an exploded perspective view showing the injector module according to the embodiment of the present invention.

FIG. 3A is a front view of an injector electrical block, and FIG. 3B is a plan view of the injector electrical block.

FIG. 4 is a sectional view showing a closed state of a valve section of the injector module.

FIG. 5 is a sectional view showing an open state of a valve section of the injector module.

FIG. 6 is a cross-sectional view showing an injector module according to a modification.

7 (a) is a front view of an injector electrical block according to a modification of the above, FIG. 7 (b) is a plan view of the injector electrical block, and FIG. 7 (c) is the injector electrical block. FIG.

8 (a) is a plan view of an injector electrical block according to another modification, FIG. 8 (b) is a plan view of the injector electrical block, and FIG. 8 (c) is an injector electrical block. FIG.

FIG. 9 is a cross-sectional view of the injector module of the above.

FIG. 10 is a front view showing a wiring body applied to the injector module of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine control unit 10 Injector part 20 Injector electric block body 21 Injector frame body 21h Injector main body accommodation hole 25 Electromagnetic coil part 26 Wiring body 27 Outer core part 28 Nonmagnetic material 30 Injector main part 31 Columnar part 32 Fixed core part 34 Movable Magnetic body 35 Valve section 39 Retractable support section 40 Coil spring 41 Auxiliary core section 48 Core section between injectors 50 Delivery pipe E Engine body Eh Injector mounting hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02M 55/02 350 F02M 51/02 ZF (72) Inventor Kazushige Nakamura 1 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Prefecture 7-10, Auto Network Technology Laboratory Co., Ltd. (72) Inventor Isao Isshiki 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Auto Network Technology Laboratory Co., Ltd. (72) Inventor Takao Nozaki Nagoya, Aichi Prefecture 1-7-10 Kikusumi, Minami-ku Auto Network Engineering Laboratory Co., Ltd. (72) Inventor Fumiyoshi Tanikawa 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie F-term in Sumitomo Wiring Systems Co., Ltd. 3G066 AA01 AB02 AD10 BA00 BA56 BA61 BA63 CB01 CC06U CC15 CC51 CD26 CE23 CE24 CE25 CE26 CE30

Claims (8)

[Claims] 1. An injector module provided with a plurality of injectors corresponding to respective combustion chambers of an engine, wherein a fuel injection control of each of the injectors is performed by an engine control unit, wherein each of the injectors on the engine body side is provided. An injector coil body in which an injector body receiving hole is provided at each position corresponding to the mounting hole, an electromagnetic coil portion is built in so as to be wound around the inner periphery of each injector body receiving hole. An injector electrical block body in which a wiring body for wiring to each of the electromagnetic coil sections is built in; a valve section formed in a substantially columnar shape for adjusting fuel injection timing from a fuel injection hole; and a straight line in the valve section. A columnar portion, which is provided in a shape of a circle, for feeding fuel supplied from a fuel inlet to the valve portion, and a predetermined portion for opening and closing the valve portion. An injector main body having a movable magnetic body that is reciprocally movable between an open position and a predetermined closed position and is urged toward the closed position. When the electromagnetic coil unit is excited, the movable magnetic body moves to the open position against the urging force, and the movable magnetic body can move to the closed position by the urging force due to non-excitation of each of the electromagnetic coil units. An injector module inserted and arranged in each of the injector main body receiving holes in a posture. 2. The injector module according to claim 1, wherein a fixed core portion is provided so as to be located at the center of the electromagnetic coil portion, and the movable magnetic body is provided on an extension of the fixed core portion. An auxiliary core portion is provided around the outer peripheral portion of the movable magnetic body, and an outer peripheral core portion is provided around the outer peripheral portion of each of the electromagnetic coil portions. An injector module having a magnetic circuit formed from the fixed core portion to the fixed core portion again through the movable magnetic body, the auxiliary core portion, and the outer peripheral core portion. 3. The injector module according to claim 2, wherein a non-magnetic material is provided between the fixed core portion and the outer peripheral core portion. 4. The injector module according to claim 2, wherein the injector frame body is provided in place of or in addition to an outer peripheral core portion disposed around an outer peripheral portion of each of the electromagnetic coil portions. An injector module in which an inter-injector core portion is disposed between each of the injector body portion accommodating holes, and a magnetic circuit is formed in which a magnetic flux generated by energization of each of the electromagnetic coil portions passes through the adjacent inter-injector core portion. 5. The injector module according to claim 1, wherein the injector electrical block is integrated with a delivery pipe. 6. The injector module according to claim 1, wherein a press-contact terminal is connected to a winding end of the electromagnetic coil unit, and a covered single-core wire is used as the wiring body. An injector module for press-connecting its end to the press-connecting terminal. 7. An injector electrical block of an injector module, wherein a plurality of injectors are provided corresponding to each combustion chamber of the engine, and a fuel injection control of each of the injectors is performed by an engine control unit. An injector frame body in which an injector body receiving hole is provided at each position corresponding to each injector mounting hole on the body side; and an injector frame body disposed so as to be wound around the inner periphery of each injector body receiving hole. An electromagnetic coil section for electromagnetically opening and closing a valve section of the injector body section inserted and arranged in each of the injector body section accommodating holes; and wiring to each of the electromagnetic coil sections incorporated in the injector frame body. And a wiring body for the injector. 8. An injector body of an injector module, wherein a plurality of injectors are provided corresponding to each combustion chamber of the engine, and a fuel injection control of each injector is performed by an engine control unit. A valve formed in a substantially columnar shape having a fuel inlet formed and a fuel injection hole formed at the other end side, provided at the fuel injection hole side, and adjusting an injection timing of fuel supplied through the fuel inlet; And a part, which is reciprocally movable between a predetermined open position for opening and closing the valve part and a predetermined closed position, and is urged toward the closed position, and is provided on the injector mounting hole side of the injector electric block body side. A movable magnetic body that moves to the open position and opens the valve unit against the urging force by excitation of the electromagnetic coil unit; Part.