Circuit arrangement body

0001The present invention relates to a circuit cord.

0002Conventionally, a circuit wiring body attached to an engine is known. The circuit wiring body is provided with conductive members such as a power supply line that supplies power to the electrical components of the engine and a signal line that transmits and receives detection signals and control signals between the electrical components of the engine and the control device. Has been done. For example, Patent Document 1 below discloses a circuit cable that is electrically connected to an electrical component attached to a cylinder head. In this circuit wiring body, a conductive member is embedded in the head cover.

<p num="0003"><patcit num="1"><text>JP-A-2002-364506</text></patcit></p>

<p num="0004"> By the way, in this type of circuit wiring body, by integrating the conductive member into the head cover, the head cover becomes large, and as a result, the physique of the engine may become large.</p><p num="0005"> Therefore, an object of the present invention is to provide a circuit wiring body capable of suppressing an increase in the size of an engine.</p>

<p num="0006"> In order to achieve the above object, the present invention provides a cording body main body including a conductive member arranged between a cylinder head and a head cover in an engine and an insulating member accommodating the conductive member inside. And an electrical connection portion having a terminal for electrically connecting the mating terminal of the electrical component and the conductive member, which are at least interposed between the cylinder head and the head cover. ..</p><p num="0007"> Here, it is desirable that the cording body main body is arranged along the outer wall surface of the cylinder head.</p><p num="0008"> Further, it is desirable that the cording body main body is fitted into a fitting portion provided on the cylinder head.</p><p num="0009"> Further, it is desirable to provide a fixing member for grounding the conductive member to be grounded via the cylinder head and fixing the cord body body to the cylinder head.</p><p num="0010"> Further, it is desirable that the electrical components are provided for each cylinder of the engine.</p>

<p num="0011"> In the circuit wiring body according to the present invention, the wiring body main body, which is a main part thereof, is arranged between the cylinder head and the head cover. Therefore, this circuit wiring body can suppress the increase in size of the head cover, and as a result, it is possible to suppress the increase in size of the engine.</p>

0012<figref num="1">FIG. 1 is a perspective view showing a state after attachment of the circuit cording body of the embodiment.</figref><figref num="2">FIG. 2 is a top view showing a state after attachment of the circuit wiring body of the embodiment.</figref><figref num="3">FIG. 3 is an exploded perspective view showing a state before attachment of the circuit wiring body of the embodiment.</figref><figref num="4">FIG. 4 is a diagram illustrating an example of electrical components.</figref><figref num="5">FIG. 5 is a top view of the circuit cording body of the embodiment.</figref><figref num="6">FIG. 6 is a sectional view taken along line XX of FIG.</figref><figref num="7">FIG. 7 is a diagram illustrating the connection between the circuit wiring body and the electrical components.</figref>

0013Hereinafter, embodiments of the circuit wiring body according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

0014[Embodiment] One of the embodiments of the circuit wiring body according to the present invention will be described with reference to FIGS. 1 to 7.

0015Reference numeral 1 in FIGS. 1 to 3 indicates a circuit cable according to this embodiment. This circuit wiring body 1 is electrically connected to an electrical component 103 that is at least interposed between the cylinder head 101 and the head cover 102 in the engine, and supplies power to the electrical component 103 and of the engine. It is used to transmit control signals from a control device (not shown). As the electrical component 103, for example, the electromagnetic drive valve 103A for intake and exhaust of the engine shown in FIG. 4, the ignition coil 103B attached to the spark plug 104 of the engine, and the like are known. Further, as the electrical component 103, an in-cylinder pressure sensor (not shown) or the like that detects the pressure in the cylinder (so-called in-cylinder pressure) is also applicable. In the part of the cylinder head 101 corresponding to each cylinder # 1 to # 4, two electromagnetic drive valves 103A for intake and two for exhaust are provided, and an ignition coil 103B attachment 101b is provided. ing. That is, these electrical components 103 are provided for each of the cylinders # 1 to # 4 of the engine. The mounting portion 101a is formed on the erection body 101c erected from the outer wall surface of the cylinder head 101 along the driving direction of the valve body of the electromagnetic drive valve 103A. Further, the hole portion of the cylinder head 101 into which the spark plug 104 is screwed is used for the mounting portion 101b. Further, the electrical component 103 may be included as long as it is not provided for each cylinder but is at least interposed between the cylinder head 101 and the head cover 102.

0016The circuit wiring body 1 includes a wiring body main body 10, a connector 20, and a collective connector 30. The wiring body main body 10 is provided with a member (conductive member 11 described later) for supplying power to the electrical component 103, transmitting a control signal, and the like. The connector 20 is an electrical connection portion for electrically connecting the member and the electrical component 103. The collective connector 30 is a collective electrical connection portion for electrically connecting the member to the secondary battery (not shown) side or the control device side. Hereinafter, this circuit routing body 1 will be specifically described.

0017As shown in FIG. 1, the wiring body body 10 is arranged between the cylinder head 101 and the head cover 102. The wiring body body 10 of this example is arranged between them along the outer wall surface of the cylinder head 101.

0018As shown in FIGS. 2, 3 and 5, the wiring body body 10 is arranged along the arrangement of the respective electromagnetically driven valves 103A for intake air (in other words, their respective attachment portions 101a). It has one wiring part 10a and a second wiring part 10b arranged along the arrangement of each electromagnetically driven valve 103A for exhaust (in other words, its respective attachment part 101a). That is, the first and second wiring portions 10a and 10b are extended along the respective cylinders # 1 to # 4. The first wiring unit 10a and the second wiring unit 10b are arranged so as to sandwich the respective electromagnetic drive valves 103A for intake and exhaust between them.

0019Further, the wiring body body 10 is formed between the first wiring portion 10a and the second wiring portion 10b along the respective ignition coils 103B (in other words, their respective attachment portions 101b). It has a third wiring section 10c that has been arranged. That is, the third wiring portion 10c extends along the arrangement of the cylinders # 1 to # 4. In this example, two third wiring portions 10c are arranged so as to sandwich each ignition coil 103B. The two third wiring units 10c are connected by the fourth wiring unit 10d. The fourth wiring unit 10d is arranged near each ignition coil 103B.

0020The wiring body 10 has at least one of the first cylinder # 1 and the fourth cylinder # 4 at both ends of the engine, the first wiring portion 10a, the second routing portion 10b, and two third arrangements. A connecting portion 10e for connecting the cord portion 10c is provided. In this example, the ends of the first wiring unit 10a, the second wiring unit 10b, and the two third wiring units 10c on the first cylinder # 1 side are connected by the connecting portion 10e.

0021The wiring body main body 10 is fitted into the fitting portion 101d provided on the cylinder head 101 while being along the outer wall surface of the cylinder head 101 (FIG. 3). The fitting portion 101d is responsible for positioning and holding the cording body main body 10 with respect to the cylinder head 101. The fitting portion 101d may be formed as a groove portion provided on the outer wall surface of the cylinder head 101, or may be formed by a protruding portion provided on the outer wall surface thereof. In the present embodiment, the first fitting portion 101d into which the first wiring portion 10a is fitted₁And the second fitting part 101d to fit the second wiring part 10b₂And the third fitting part 101d into which the third wiring part 10c and the fourth wiring part 10d are fitted.₃And are provided.

00221st fitting 101d₁And the second fitting 101d₂The space sandwiched between the standing body 101c projecting from the outer wall surface of the cylinder head 101 and the plurality of projecting portions 101e is used. The erection body 101c has a wall surface along the extending direction of the first wiring portion 10a and the second wiring portion 10b. A plurality of projecting portions 101e are arranged at positions facing the wall surface at intervals along the extending direction thereof. Therefore, here, the space between the wall surface and the plurality of projecting portions 101e is the first fitting portion 101d.₁And the second mating part 101d₂become.

0023Third fitting part 101d₃The space sandwiched by the two protrusions 101f extending along the attachment portion 101b of each ignition coil 103B is used. Each of the protruding portions 101f is arranged so that the mounting portion 101b of each ignition coil 103B is sandwiched between them, and has wall surfaces facing each other. Here, the space between the respective wall surfaces is the third fitting portion 101d.₃Will be.

0024The wiring body body 10 is held by the fitting portion 101d on the cylinder head 101, and is fixed to the cylinder head 101 by the fixing member 40. The fixing member 40 is provided with not only a fixing function to the cylinder head 101 but also a grounding function of the wiring body body 10.

0025For example, the fixing member 40 of this example is a shaft-shaped pin member made of a conductive material, and is inserted into a hole 10f provided in the wiring body body 10 and has a fitting hole 101g provided in the cylinder head 101. Fit into. As a result, the wiring body body 10 is fixed to the cylinder head 101 by the fixing member 40 while being held by the fitting portion 101d to the cylinder head 101. Therefore, the circuit wiring body 1 can ensure vibration resistance.

0026Here, the hole portion 10f is provided at a position protruding from the connecting portion 10e along the outer wall surface of the cylinder head 101, and the fitting hole 101g is provided at a position facing the hole portion 10f. Further, in the hole portion 10f, the inserted fixing member 40 is configured to come into contact with the conductive member 11 to be grounded. Therefore, the conductive member 11 to be grounded is projected along the outer wall surface of the cylinder head 101 so as to be exposed to the outside as a part of the inner wall surface of the hole portion 10f. As a result, the fixing member 40 is in a conductive state with the conductive member 11 to be grounded, and is also in a conductive state with the cylinder head 101. Here, the cylinder head 101 is generally formed of a conductive material such as aluminum and is grounded. Therefore, the fixing member 40 can ground the conductive member 11 to be grounded via the cylinder head 101. The protruding portion where the hole portion 10f is formed is formed of an insulating material (for example, integrally molded together with the insulating member 12 of the wiring body body 10) that covers the conductive member 11 to be grounded. However, this protruding portion may be the conductive member 11 to be grounded or the molded body itself of the conductive material that is electrically connected to the conductive member 11.

0027As described above, in the circuit wiring body 1, the members required for fixing can be simplified and the number of members can be reduced, and the members required for grounding can be simplified and the number of members can be reduced. Therefore, the circuit wiring body 1 can be reduced in weight and cost.

0028The wiring body body 10 includes a conductive member 11 that is arranged between the cylinder head 101 and the head cover 102, and an insulating member 12 that houses the conductive member 11 inside (FIG. 6). .. Note that FIG. 6 is a diagram conceptually showing the XX line cross section of FIG. The number of the conductive members 11 is prepared according to the circuit of the circuit wiring body 1. The conductive member 11 is a member formed from a conductive material such as metal. For example, an electric wire, a bus bar (a molded body of a metal plate material), or the like is applied to the conductive member 11. The insulating member 12 is a member molded from an insulating material such as a synthetic resin. As the insulating member 12, for example, a covering member such as a resin tube covering the conductive member 11, a member integrally molded (that is, modularized) while accommodating the conductive member 11 inside, and the like are applied. The cording body main body 10 of the present embodiment is obtained by integrally molding the latter conductive member 11 and the insulating member 12. Here, since the engine generates heat due to its combustion, a material having high heat resistance that can withstand the heat of the engine is used as the conductive material and the insulating material.

0029One end of the conductive member 11 in the first and second wiring portions 10a and 10b is electrically connected to the terminal (not shown) of the collective connector 30 via the connecting portion 10e. Similarly, for the third wiring portion 10c, one end of the conductive member 11 is electrically connected to the terminal (not shown) of the collective connector 30 via the connecting portion 10e. A plurality of conductive members 11 are provided on the first to third wiring portions 10a, 10b, and 10c, respectively. In the collective connector 30, the number of terminals is determined based on the number of conductive members 11. However, for example, when the first to third wiring portions 10a, 10b, and 10c each have conductive members 11 for power supply, in the collective connector 30, the terminals corresponding to these conductive members 11 are connected. It may be shared. Here, although not shown, the other-side terminals of the other-side connectors on the secondary battery side and the control device side are electrically connected to the respective terminals of the collective connector 30. Further, each terminal of the collective connector 30 may be a member formed from a conductive material separate from the conductive member 11, but may be one end of the conductive member 11 itself. Further, in the present embodiment, the housing of the collective connector 30 is integrally molded together with the insulating member 12 of the wiring body main body 10. Either the terminal or the mating terminal may be male or female. The same applies below.

0030The first and second wiring portions 10a and 10b are provided with a first connector 21 as a connector 20 that is responsible for electrical connection with the electromagnetically driven valve 103A. The first connector 21 is prepared for each electromagnetically driven valve 103A, and is arranged at intervals along the extending direction of the first wiring portion 10a and the second wiring portion 10b. Then, the first connector 21 is connected to the connector of the electromagnetic drive valve 103A (hereinafter, referred to as counterpart connector) 103a. Therefore, the first connector 21 of the first wiring portion 10a electrically connects the conductive member 11 of the first wiring portion 10a and the mating connector 103a of the electromagnetic drive valve 103A on the first wiring portion 10a side. A terminal (not shown) to be connected is provided. Similarly, on the second wiring portion 10b side, the first connector 21 includes a terminal (not shown) for electrically connecting the conductive member 11 and the mating side connector 103a. In the first connector 21, the number of terminals is determined according to the circuit required for the electromagnetically driven valve 103A. Then, each terminal is electrically connected to the corresponding conductive member 11 as appropriate. Here, the terminal of the first connector 21 may be a member formed from a conductive material different from the conductive member 11 of the first wiring portion 10a or the second wiring portion 10b, and the conductivity thereof. It may be the other end of the sex member 11 itself. Further, in the present embodiment, the housing of the first connector 21 is integrally molded together with the insulating member 12 of the wiring body main body 10.

0031The electromagnetically driven valve 103A is inserted into the mounting portion 101a along the driving direction of its own valve body, and is removed from the mounting portion 101a in the direction opposite to the insertion direction. In the present embodiment, the electromagnetic drive valve 103A is attached to the attachment portion 101a (that is, the cylinder head 101), and the connection work of the mating connector 103a to the first connector 21 is completed. Therefore, the connection direction between the terminal of the first connector 21 and the mating terminal of the mating connector 103a is set in the attachment / detachment direction of the electromagnetic drive valve 103A with respect to the cylinder head 101 (FIG. 7). Specifically, in the mating connector 103a, the mating terminal extending in the insertion direction of the electromagnetic drive valve 103A into the cylinder head 101 and the insertion direction of the electromagnetic drive valve 103A serving as the insertion port of the terminal of the first connector 21 A side opening is provided. The first connector 21 has an opening extending in the insertion direction of the electromagnetic drive valve 103A and an opening on the opposite side of the insertion direction of the electromagnetic drive valve 103A, which is the insertion port of the other terminal of the mating connector 103a. And. As a result, the circuit wiring body 1 can complete the connection between the first connector 21 and the mating connector 103a at the same time as the electromagnetic drive valve 103A is attached. Therefore, in this circuit wiring body 1, the conventionally required attachment process of the electromagnetic drive valve 103A and the connection process between the first connector 21 and the mating connector 103a can be integrated into one process. The electrical connection workability during that period can be improved.

0032The fourth wiring unit 10d is provided with a second connector 22 as a connector 20 that is responsible for electrical connection with the ignition coil 103B. The second connector 22 is prepared for each ignition coil 103B and is connected to the connector (counterpart connector) 103b of the ignition coil 103B. Therefore, the second connector 22 includes a terminal (not shown) for electrically connecting the conductive member 11 of the fourth wiring portion 10d and the mating connector 103b of the ignition coil 103B. The conductive member 11 of the fourth wiring portion 10d corresponds to the circuit required for the ignition coil 103B, and is the other end of the third wiring portion 10c or a branching portion from the third wiring portion 10c. Is. In the second connector 22, the number of terminals is determined according to the conductive member 11 (that is, the circuit required for the ignition coil 103B). Then, each terminal is electrically connected to the corresponding conductive member 11 as appropriate. Here, the terminal of the second connector 22 may be a member formed from a conductive material different from the conductive member 11 of the fourth wiring portion 10d, and the other end of the conductive member 11 may be formed. Or the branch itself. Further, in the present embodiment, the housing of the second connector 22 is integrally molded together with the insulating member 12 of the wiring body main body 10.

0033The ignition coil 103B is inserted into the mounting portion 101b along the axial direction of the spark plug 104, and is removed from the mounting portion 101b in the direction opposite to the insertion direction. In the present embodiment, the ignition coil 103B is attached to the attachment portion 101b (that is, the cylinder head 101), and the connection work of the mating connector 103b to the second connector 22 is completed. Therefore, the connection direction between the terminal of the second connector 22 and the mating terminal of the mating connector 103b is set in the attachment / detachment direction of the ignition coil 103B with respect to the cylinder head 101. Specifically, the mating connector 103b has a mating terminal extending in the insertion direction of the ignition coil 103B into the cylinder head 101 and an ignition coil 103B serving as an insertion port for the terminal of the second connector 22 on the insertion direction side. An opening is provided. The second connector 22 has a terminal extending in the insertion direction of the ignition coil 103B and an opening on the side opposite to the insertion direction side of the ignition coil 103B, which is the insertion port of the other side terminal of the other side connector 103b. Is provided. As a result, the circuit wiring body 1 can complete the connection between the second connector 22 and the mating connector 103b at the same time as the ignition coil 103B is attached. Therefore, in this circuit wiring body 1, the conventionally required attachment process of the ignition coil 103B and the connection process between the second connector 22 and the mating connector 103b can be integrated into one process. It is possible to improve the electrical connection workability of the.

0034As shown above, in the circuit wiring body 1 of the present embodiment, the wiring body main body 10 which is the main part thereof is arranged between the cylinder head 101 and the head cover 102. Therefore, the circuit wiring body 1 can suppress the increase in size of the head cover 102, and as a result, the increase in size of the engine can be suppressed. In particular, this circuit wiring body 1 efficiently suppresses the increase in size of the head cover 102 by arranging the arrangement along the outer wall surface of the cylinder head 101 between the cylinder head 101 and the head cover 102, and the size of the engine is large. It is possible to effectively suppress the conversion. Further, since the circuit wiring body 1 can suppress the exposure of the wiring body body 10 to the outside, the appearance can be improved. Therefore, since the circuit wiring body 1 does not require a cover (so-called design cover) that further covers the head cover 102, it is possible to reduce the size of the engine and the weight of the engine, and also to reduce the cost. be able to. Furthermore, in this circuit wiring body 1, since the connector 20 is arranged between the cylinder head 101 and the head cover 102, it is not necessary to improve the waterproofness of the connector 20 and the connector on the other side of the electrical component 103. From this point as well, cost reduction is possible.

0035Further, in the circuit wiring body 1 of the present embodiment, the connection work between the connector on the other side of the electrical component 103 and the connector 20 can be completed at the same time as the attachment of the electrical component 103. Therefore, the circuit wiring body 1 facilitates the connection work between the connector 20 and the electrical component 103, and can improve the reliability of the electrical connection between them. Further, since the circuit wiring body 1 can perform the connection work while visually and tactilely confirming the connection work, the reliability of the electrical connection can be improved from this point as well. Furthermore, since the circuit wiring body 1 does not have an electric wire interposed between the wiring body main body 10 and the electrical component 103, the electric wire does not get caught when the head cover 102 is assembled to the cylinder head 101. From the point of view, the reliability of the electrical connection can be improved.

0036By the way, in the present embodiment, the circuit wiring bodies 1 are provided on the intake side and the exhaust side, respectively, but the circuit wiring bodies as described above are arranged on either the intake side or the exhaust side. It may be a thing. In this case, on the other hand, a conventional cam-driven valve body is arranged. Further, when the engine is V type (including horizontally opposed) or W type, the circuit wiring body 1 may be provided for each bank.

00371 circuit wiring body 10 Cable body 10f hole 11 Conductive member 12 Insulating member 20 connector 21 1st connector 22 2nd connector 40 Fixing member 101 Cylinder head 101d mating part 101g mating hole 102 head cover 103 Electrical components 103A electromagnetic drive valve 103B ignition coil 103a, 103b mating connector # 1, # 2, # 3, # 4 cylinders