engine

Abstract

To provide an engine including a wiring structure capable of suppressing vibration and noise while simplifying wiring of wire harnesses.SOLUTION: A wire assembly 40 is constituted by holding a plurality of wire harnesses 30 by protectors 41, 42 and putting them together with a shape suitable for wiring. An engine cover 10 is mounted on a cylinder head 50 in a state of holding the wire assembly 40 and a sound absorber 20 between the cylinder head 50 and the engine cover 10 and elastically deforming the sound absorber 20. The protectors 41, 42 are pressed toward the cylinder head 50 by restoring force of the sound absorber 20. The sound absorber 20 has an engagement portion 21 thicker than a thickness of a contact region on a peripheral edge portion of the contact region pressed to the protectors 41, 42, and the engagement portion 21 is disposed in adjacent to side faces of the protectors 41, 42.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to an engine.

Background Art

[0002] Patent Document 1 discloses an engine. In this engine, a sound-absorbing material made of foamed urethane is disposed so as to fill the space between the engine cover attached to the cylinder head and the intake port. The sound-absorbing material is provided with a groove into which a wire harness is fitted. The wire harness is fitted into this groove and arranged.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of the above configuration, the groove of the sound-absorbing material is formed in a shape along the routing path of the wire harness. When routing the wire harness, it is necessary to fit the wire harness into the groove of the sound-absorbing material.

Means for Solving the Problems

[0005] Hereinafter, the means for solving the above problems and their effects will be described. An engine to solve the above problem comprises a cylinder head, a wire assembly formed by holding multiple wire harnesses with a protector and shaping them to be suitable for routing, sound-absorbing material, and an engine cover that covers the wire assembly and sound-absorbing material and is disposed on the cylinder head. In this engine, the engine cover is attached to the cylinder head with the wire assembly and sound-absorbing material sandwiched between the cylinder head and the engine cover, causing the sound-absorbing material to be elastically deformed, and the protector is held in a state where it is pressed toward the cylinder head by the restoring force of the sound-absorbing material. When the direction from the cylinder head toward the engine cover is defined as upward, The sound-absorbing material is the protector On the upward-facing surface in the above, from the engine cover side The contact area being pressed and the aforementioned contact area At the periphery Located , locking portion thicker than the thickness in the contact area and, It has the locking part 、 The protector This is a surface in which the direction is perpendicular to the upward direction. On the side Contact They are doing it.

[0006] According to the above configuration, a wire assembly, in which multiple wire harnesses are bundled together in a shape suitable for routing, can be held in place by the restoring force of the sound-absorbing material and its engagement with the locking part. Therefore, the wire harness can be routed without the need to fit the wire harness into the groove of the sound-absorbing material. Furthermore, the wire assembly can be held in place by utilizing the restoring force of the sound-absorbing material sandwiched between the engine cover and the cylinder head. In other words, it is possible to facilitate the routing of the wire harness while suppressing noise and wear caused by vibration of the wire assembly.

[0007] In one embodiment of the engine, the portion of the locking part that connects to the contact area becomes thinner as it approaches the contact area, forming an inclined surface. According to the above configuration, when sound-absorbing material is placed over the wire assembly arranged on the cylinder head, the protector comes into contact with the inclined surface. The sound-absorbing material is then guided by this inclined surface so that the contact area comes into contact with the protector. Therefore, the sound-absorbing material is more easily positioned as designed.

[0008] In one embodiment of the engine, the inclined surface of the sound-absorbing material is in contact with the protector. Because the inclined surface is in contact with the protector, the protector is also held in place from the sides. In one embodiment of the engine, a plurality of locking portions are provided on the periphery of the contact area so as to be positioned on either side of the protector.

[0009] The two locking parts positioned on either side of the protector can restrict the movement of the protector in the direction along the line connecting these two locking parts. In one embodiment of the engine, the locking portion is provided at a position adjacent to the portion where the two sides of the protector connect.

[0010] According to the above configuration, one locking part faces two sides of the protector. Therefore, one locking part can suppress movement not only in one direction but in multiple directions. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a schematic diagram showing an engine in one embodiment with an engine cover attached. [Figure 2] Figure 2 is an exploded view showing the engine cover, sound-absorbing material, and wire assembly attached to the cylinder head, separated from each other. [Figure 3] Figure 3 is a top view of the cylinder head with the wire harness not yet installed. [Figure 4] Figure 4 is a top view of the wire assembly. [Figure 5] Figure 5 is a top view of the cylinder head with the wire harness installed. [Figure 6] Figure 6 is a cross-sectional view of the connection between the protector and the cylinder head. [Figure 7] Figure 7 is a top view of the cylinder head with sound-absorbing material covering it. [Figure 8] Figure 8 shows the back surface of the sound-absorbing material. [Figure 9] Figure 9 is a cross-sectional view taken along line 9-9 in Figure 8. [Figure 10] Figure 10 is a view showing a state in which a wire assembly and a sound-absorbing material are combined. [Figure 11] Figure 11 is a top view of a cylinder head with an engine cover attached. [Figure 12] Figure 12 is a cross-sectional view of a connecting portion between an engine cover and a cylinder head.

Embodiments for Carrying out the Invention

[0012] Hereinafter, an embodiment of an engine will be described with reference to FIGS. 1 to 12. <Configuration of Engine 100> As shown in FIG. 1, an engine cover 10 is attached to a cylinder head 50 of an engine 100. The cylinder head 50 includes a head cover 51, a camshaft housing 52, and a cylinder head body 53. The cylinder head body 53 is combined with a cylinder block 60 to form a combustion chamber. The camshaft housing 52 is assembled to the cylinder head body 53 to support an intake camshaft and an exhaust camshaft. The head cover 51 is assembled to the camshaft housing 52 to seal a cam chamber.

[0013] Various electrical components such as sensors and electric valves are attached to the engine 100. A wire harness 30 is connected to these electrical components. The wire harness 30 is an assembly component formed by bundling wires for signal communication between the electrical components and a control device and wires for supplying power to the electrical components. A wire assembly 40 is attached to the cylinder head 50 of the engine 100.

[0014] As shown in FIG. 2, the wire assembly 40 holds a plurality of wire harnesses 30 by a first protector 41 and a second protector 42 and combines them into a shape suitable for routing. As shown in Figure 1, the wire assembly 40 is mounted on the cylinder head by fixing the first protector 41 and the second protector 42 to the head cover 51. A sound-absorbing material 20 is sandwiched between the wire assembly 40 and the engine cover 10. The sound-absorbing material 20 is, for example, molded urethane foam. However, the sound-absorbing material 20 may be molded from other materials. For example, the sound-absorbing material 20 may be molded from ethylene propylene rubber sponge.

[0015] The engine cover 10 is attached to the cylinder head 50 so as to cover the wire assembly 40 and sound-absorbing material 20 which are arranged on the cylinder head 50. The engine cover 10 is attached to the cylinder head 50 with the sound-absorbing material 20 and wire assembly 40 sandwiched between them, causing the sound-absorbing material 20 to be elastically deformed.

[0016] <Configuration of cylinder head 50> Next, with reference to Figure 3, the configuration of the upper surface of the cylinder head 50 to which the wire assembly 40 is attached will be described. Figure 3 is a top view of the head cover 51 that constitutes the upper surface of the cylinder head 50. The engine 100 is an inline four-cylinder engine equipped with four cylinders, from cylinder 1 to cylinder 4. In the engine 100, cylinders 1, 2, 3, and 4 are arranged in order from left to right in Figure 3.

[0017] As shown in Figure 3, the cylinder head 50 is fitted with a first ignition coil 111, a second ignition coil 112, a third ignition coil 113, and a fourth ignition coil 114. The first ignition coil 111 is connected to the spark plug of cylinder 1. The second ignition coil 112 is connected to the spark plug of cylinder 2. The third ignition coil 113 is connected to the spark plug of cylinder 3. The fourth ignition coil 114 is connected to the spark plug of cylinder 4.

[0018] The cylinder head 50 is fitted with a first injector 121, a second injector 122, a third injector 123, and a fourth injector 124. The first injector 121 injects fuel into cylinder 1. The second injector 122 injects fuel into cylinder 2. The third injector 123 injects fuel into cylinder 3. The fourth injector 124 injects fuel into cylinder 4.

[0019] Furthermore, as shown in Figure 3, an intake cam position sensor 131 and an exhaust cam position sensor 132 are mounted on the cylinder head 50. The intake cam position sensor 131 detects the rotational phase of the intake camshaft. The exhaust cam position sensor 132 detects the rotational phase of the exhaust camshaft.

[0020] <Configuration of wire assembly 40> Next, the configuration of the wire assembly 40 will be described. Figure 4 is a top view of the wire assembly 40. Figure 5 is a top view of the cylinder head 50 with the wire assembly 40 installed.

[0021] As shown in Figure 4, the wire assembly 40 comprises a first protector 41 and a second protector 42. The first protector 41 and the second protector 42 are plastic cases that hold a plurality of wire harnesses 30.

[0022] As shown in Figure 4, the first protector 41 holds a first main line 321 which is a bundle of multiple wire harnesses 30 including the first branch lines 301 to the eleventh branch line 311. The bundled wire harnesses 30 are covered with a protective material such as corrugated tubing. The first main line 321 branches into multiple branch lines and main lines within the first protector 41. The first protector 41 is equipped with a first branch pipe 411, a second branch pipe 412, a third branch pipe 413, a fourth branch pipe 414, and a fifth branch pipe 415 that guide these branch lines and main lines.

[0023] As shown in Figure 4, the first branch pipe 411 is a branch pipe that guides the second main line 322. The second main line 322, which exits the first protector 41 from the first branch pipe 411, is held by the second protector 42. The second main line 322 is a main line that bundles the wire harness 30 which will become the sixth branch line 306 to the tenth branch line 310.

[0024] The second main line 322 branches into the sixth branch line 306 to the tenth branch line 310 within the second protector 42. The second protector 42 is equipped with five branch pipes that guide each of these five branch lines.

[0025] The second branch pipe 412 of the first protector 41 is a branch pipe that guides the third main line 323 and the first branch line 301. The third main line 323, which exits the first protector 41 from the second branch pipe 412, is a bundle of branch lines that connect to electrical components mounted on the cylinder block 60. The third main line 323 extends toward the cylinder block 60. As shown in Figure 4, the first branch line 301, which exits the first protector 41 from the second branch pipe 412, is a wire harness 30 that connects to the first injector 121. As shown in Figure 5, the connector 32 of the first branch line 301 connects to the first injector 121.

[0026] The first protector 41 has a hole on its side for routing the second branch wire 302 to the outside. As shown in Figure 4, the second branch wire 302 exits the first protector 41 through this hole. The second branch wire 302 that exits the first protector 41 is the wire harness 30 connected to the second injector 122. As shown in Figure 5, the connector 32 of the second branch wire 302 is connected to the second injector 122.

[0027] As shown in Figure 4, the third branch pipe 413 is a branch pipe that guides the third branch wire 303. The third branch wire 303 that exits the first protector 41 from the third branch pipe 413 is a wire harness 30 that connects to the third injector 123. As shown in Figure 5, the connector 32 of the third branch wire 303 is connected to the third injector 123.

[0028] As shown in Figure 4, the fourth branch pipe 414 is a branch pipe that guides the fourth branch wire 304 and the fifth branch wire 305. The fourth branch wire 304 that exits the first protector 41 from the fourth branch pipe 414 is a wire harness 30 connected to the fourth injector 124. The fifth branch wire 305 that exits the first protector 41 from the fourth branch pipe 414 is a wire harness 30 connected to the intake cam position sensor 131. As shown in Figure 5, the connector 32 of the fourth branch wire 304 is connected to the fourth injector 124. The connector 32 of the fifth branch wire 305 is connected to the intake cam position sensor 131.

[0029] As shown in Figure 4, the fifth branch pipe 415 is a branch pipe that guides the eleventh branch wire 311. The eleventh branch wire 311 that exits the first protector 41 from the fifth branch pipe 415 is a wire harness 30 that is connected to, for example, an intake pressure sensor mounted on the intake manifold.

[0030] As shown in Figure 4, the sixth branch pipe 426 is a branch pipe that guides the tenth branch wire 310. The tenth branch wire 310, which exits the second protector 42 from the sixth branch pipe 426, is a wire harness 30 that connects to the exhaust cam position sensor 132. As shown in Figure 5, the connector 32 of the tenth branch wire 310 is connected to the exhaust cam position sensor 132.

[0031] As shown in Figure 4, the seventh branch pipe 427 is a branch pipe that guides the sixth branch wire 306. The sixth branch wire 306, which exits the second protector 42 from the seventh branch pipe 427, is a wire harness 30 that connects to the first ignition coil 111. As shown in Figure 5, the connector 32 of the sixth branch wire 306 is connected to the first ignition coil 111.

[0032] As shown in Figure 4, the eighth branch pipe 428 is a branch pipe that guides the seventh branch wire 307. The seventh branch wire 307, which exits the second protector 42 from the eighth branch pipe 428, is a wire harness 30 that connects to the second ignition coil 112. As shown in Figure 5, the connector 32 of the seventh branch wire 307 connects to the second ignition coil 112.

[0033] As shown in Figure 4, the ninth branch pipe 429 is a branch pipe that guides the eighth branch wire 308. The eighth branch wire 308, which exits the second protector 42 from the ninth branch pipe 429, is a wire harness 30 that connects to the third ignition coil 113. As shown in Figure 5, the connector 32 of the eighth branch wire 308 connects to the third ignition coil 113.

[0034] As shown in Figure 4, the 10th branch pipe 420 is a branch pipe that guides the 9th branch wire 309. The 9th branch wire 309 that exits the 2nd protector 42 from the 10th branch pipe 420 is a wire harness 30 that connects to the 4th ignition coil 114. As shown in Figure 5, the connector 32 of the 9th branch wire 309 connects to the 4th ignition coil 114.

[0035] The wire assembly 40 is connected to the head cover 51 by a snap fitting. For example, as shown in Figure 6, a locking piece 501 is provided on the upper surface of the head cover 51. A locking hole 502 is provided in the locking piece 501. An insertion groove 401 into which the locking piece 501 is inserted is provided on the lower surface of the first protector 41. A locking claw 402 is provided inside the insertion groove 401. When the locking piece 501 is inserted into the insertion groove 401, the locking claw 402 elastically deforms and enters the locking hole 502 of the locking piece 501. In this way, the locking claw 402 engages with the locking piece 501, preventing the locking piece 501 from coming out of the insertion groove 401. The locking hole 502 is made larger than the dimensions of the locking claw 402 to account for manufacturing tolerances.

[0036] Multiple such locking pieces 501 are provided on the cylinder head 50. The first protector 41 and the second protector 42 are provided with multiple insertion grooves 401 into which the locking pieces 501 are inserted. The first protector 41 and the second protector 42 are connected to the cylinder head 50 by snap fitting after inserting the locking pieces 501 into these insertion grooves 401.

[0037] As shown in Figure 5, the multiple wire harnesses 30 held by the protectors 41 and 42 are guided by the branch tubes of the protectors 41 and 42 to the vicinity of the electrical components to which they are connected. In other words, the wire assembly 40 holds the multiple wire harnesses 30 with the protectors 41 and 42 and bundles the wire harnesses 30 into a shape suitable for routing. Because the engine 100 employs such a wire assembly 40, routing the wire harnesses 30 is made easy.

[0038] <Composition of sound-absorbing material 20> As shown in Figure 7, the cylinder head 50 to which the wire assembly 40 is attached is covered with sound-absorbing material 20 from above the wire assembly 40.

[0039] Figure 8 is a bottom view of the sound-absorbing material 20, showing the shape of the back surface of the sound-absorbing material 20. In Figure 8, the portion of the sound-absorbing material 20 that contacts the upper surface of the first protector 41 is shown as the first contact region CR1. Also in Figure 8, the portion of the sound-absorbing material 20 that contacts the upper surface of the second protector 42 is shown as the second contact region CR2. The sound-absorbing material 20 is provided with seven locking portions 21 on the periphery of the contact regions CR1 and CR2. The seven locking portions 21 are the first locking portion 211, the second locking portion 212, the third locking portion 213, the fourth locking portion 214, the fifth locking portion 215, the sixth locking portion 216, and the seventh locking portion 217. The first to third locking portions 211 are provided on the periphery of the second contact region CR2. The fourth locking portion 214 to the seventh locking portion 217 are provided on the periphery of the first contact region CR1.

[0040] The thickness Th2 of each locking portion 211 to 217 is greater than the thickness Th1 in the contact regions CR1 and CR2. In other words, the sound-absorbing material 20 has multiple locking portions 21 at the periphery of the contact regions CR1 and CR2 that are thicker than the thickness Th1 in the contact regions CR1 and CR2. For example, as shown in Figure 9, the thickness Th2 of the fourth locking portion 214 and the fifth locking portion 215 is greater than the thickness Th1 in the first contact region CR1 that the first protector 41 contacts.

[0041] As shown in Figure 9, the fourth locking portion 214 and the fifth locking portion 215 become wider as they approach the base. As a result, the portion of the fourth locking portion 214 that connects to the first contact area CR1 becomes thinner as it approaches the first contact area CR1, forming an inclined surface. Similarly, the portion of the fifth locking portion 215 that connects to the first contact area CR1 also becomes thinner as it approaches the first contact area CR1, forming an inclined surface.

[0042] As shown in Figure 9, the distance between the tip of the fourth locking portion 214 and the tip of the fifth locking portion 215 is wider than the width of the first protector 41. The width of the portion with a thickness Th1 in the first contact area CR1 is slightly narrower than the width of the first protector 41. Therefore, by simply aligning the first protector 41 to some extent so that it is positioned between the tip of the fourth locking portion 214 and the tip of the fifth locking portion 215 and then placing the sound-absorbing material 20 over it, the inclined surface of the sound-absorbing material 20 will come into contact with the first protector 41. The inclined surface then guides the sound-absorbing material 20 so that the first contact area CR1 comes into contact with the first protector 41.

[0043] Each locking portion 211 to 217 similarly has an inclined surface. Therefore, when the sound-absorbing material 20 is placed over it, the inclined surfaces of locking portions 211 to 213 come into contact with the second protector 42, and the inclined portions of locking portions 214 to 217 come into contact with the first protector 41.

[0044] Figure 10 is a bottom view of the sound-absorbing material 20 in a state where the sound-absorbing material 20 is placed over the wire assembly 40 and the sound-absorbing material 20 and wire assembly 40 are combined. As shown in Figure 10, the first locking portion 211 is adjacent to the point where the ninth branch pipe 429 and the tenth branch pipe 420 diverge. That is, the first locking portion 211 is located adjacent to the point where the side surface of the ninth branch pipe 429 and the side surface of the tenth branch pipe 420 connect in the second protector 42. Thus, the first locking portion 211 is adjacent to both the ninth branch pipe 429 and the tenth branch pipe 420. The second locking portion 212 is adjacent to the point where the base of the sixth branch pipe 426 connects in the second protector 42. Thus, the second locking portion 212 is also located adjacent to the point where multiple sides of the second protector 42 connect. The third locking portion 213 is adjacent to the tip of the sixth branch pipe 426. That is, the third locking portion 213 is also adjacent to the side surface of the second protector 42.

[0045] As shown in Figure 10, the first locking portion 211 and the third locking portion 213 are positioned so as to sandwich the second protector 42. The first locking portion 211 and the second locking portion 212 are also positioned so as to sandwich the second protector 42.

[0046] As shown in Figure 10, the fourth locking portion 214 is adjacent to the portion of the first protector 41 that holds the first main line 321 and the portion where the fourth branch pipe 414 branches off. That is, the fourth locking portion 214 is located adjacent to the portion of the first protector 41 where multiple sides are connected. The fifth locking portion 215 is adjacent to the portion of the first protector 41 that holds the first main line 321 and the portion where the fifth branch pipe 415 branches off. That is, the fifth locking portion 215 is also located adjacent to the portion of the first protector 41 where multiple sides are connected. The seventh locking portion 217 is adjacent to the portion of the first protector 41 where the first branch pipe 411 and the second branch pipe 412 branch off. That is, the seventh locking portion 217 is located adjacent to the portion of the first protector 41 where the side of the first branch pipe 411 and the side of the second branch pipe 412 are connected. As a result, the seventh locking portion 217 is adjacent to both the first branch pipe 411 and the second branch pipe 412.

[0047] As shown in Figure 10, the sixth locking portion 216 is provided adjacent to the side surface of the first protector 41 so as to sandwich the first protector 41 between the sixth locking portion 216 and the seventh locking portion 217. The fourth locking portion 214 and the fifth locking portion 215 are positioned to sandwich the first protector 41. The fourth locking portion 214 and the seventh locking portion 217 are also positioned to sandwich the first protector 41. The fifth locking portion 215 and the seventh locking portion 217 are also positioned to sandwich the first protector 41.

[0048] <Configuration of engine cover 10> As shown in Figure 11, a head cover 51 is attached to the cylinder head 50, which has the wire assembly 40 assembled and covered with sound-absorbing material 20. The head cover 51 is fixed to the cylinder head 50 in a manner that covers the sound-absorbing material 20.

[0049] As shown in Figure 12, multiple support columns 11 are provided on the underside of the head cover 51. Ring-shaped rubber bushings 12 are attached to the tips of the support columns 11. Multiple pins 503 are provided on the head cover 51 for insertion into the rubber bushings 12. Similar pins 503 are also provided on the intake manifold. The head cover 51 is connected to the cylinder head 50 by inserting the pins 503 into the rubber bushings 12.

[0050] <Operation of this embodiment> When the pin 503 is inserted into the rubber bushing 12, the sound-absorbing material 20 sandwiched between the wire assembly 40 and the engine cover 10 undergoes elastic deformation. As a result, the first contact area CR1 of the sound-absorbing material 20 comes into contact with the first protector 41, and the second contact area CR2 comes into contact with the second protector 42. Thus, as shown in Figure 1, the protectors 41 and 42 are held in a state pressed against the cylinder head 50 by the restoring force of the sound-absorbing material 20.

[0051] Furthermore, as shown in Figure 1, the protectors 41 and 42 are also supported from the sides by the locking portion 21. <Effects of this embodiment> (1) In the engine 100, a wire assembly 40, which is made by bundling multiple wire harnesses 30 into a shape suitable for routing, can be held by the restoring force of the sound-absorbing material 20 and its engagement with the locking part 21. Therefore, the wire harnesses 30 can be routed without the need to fit the wire harnesses 30 into grooves in the sound-absorbing material 20. In addition, the wire assembly 40 can be held by utilizing the restoring force of the sound-absorbing material 20 sandwiched between the engine cover 10 and the cylinder head 50. As explained with reference to Figure 6, the dimensions of the locking hole 502 provided in the locking piece 501 are larger than the dimensions of the locking claw 402. Therefore, even when the locking claw 402 is in the locking hole 502, the protectors 41 and 42 can be displaced relative to the head cover 51 by the amount of the gap between the locking claw 402 and the locking hole 502. In contrast, this engine 100 holds the wire assembly 40 by pressing it against the cylinder head 50 using the restoring force of the sound-absorbing material 20. Therefore, vibrations of the protectors 41 and 42 due to displacement along the Z-axis shown in Figure 10 can be suppressed. In addition, the locking portion 21 holds the protectors 41 and 42 from the sides as well. Therefore, vibrations of the protectors 41 and 42 due to displacement along the plane stretched by the X-axis and Y-axis shown in Figure 10 can also be suppressed. In other words, the engine 100 can facilitate the routing of the wire harness 30 while suppressing noise, wear, and other issues caused by vibrations of the wire assembly 40.

[0052] (2) In the engine 100, when the sound-absorbing material 20 is placed over the wire assembly 40 arranged on the cylinder head 50, the protectors 41 and 42 come into contact with the inclined surfaces. The sound-absorbing material 20 is then guided by these inclined surfaces so that the contact areas CR1 and CR2 come into contact with the protectors 41 and 42. Therefore, in the engine 100, the sound-absorbing material 20 is easily positioned as designed.

[0053] (3) In the engine 100, the inclined surface is in contact with the protectors 41 and 42. Therefore, the locking portion 21 is in contact with the side surface of the protectors 41 and 42. Thus, in the engine 100, the protectors 41 and 42 are also held from the side.

[0054] (4) As shown in Figure 10, the sixth locking portion 216 and the seventh locking portion 217 are positioned adjacent to the side surface of the first protector 41 so as to sandwich the first protector 41. The sixth locking portion 216 restricts the displacement of the first protector 41 in the negative direction along the Y-axis as shown in Figure 10. The seventh locking portion 217 restricts the displacement of the first protector 41 in the positive direction along the Y-axis. Therefore, the displacement of the first protector 41 in the direction along the Y-axis can be suppressed by the sixth locking portion 216 and the seventh locking portion 217. The fourth locking portion 214 and the seventh locking portion 217 are positioned so as to sandwich the first protector 41. The fourth locking portion 214 restricts the displacement of the first protector 41 in the negative direction along the X-axis as shown in Figure 10. Furthermore, the seventh locking portion 217 restricts the displacement of the first protector 41 in the positive direction along the X-axis. Therefore, the displacement of the first protector 41 in the direction along the X-axis can be suppressed by the fourth locking portion 214 and the seventh locking portion 217.

[0055] The relationship between the first locking portion 211 and the second locking portion 212 with respect to the second protector 42, and the relationship between the first locking portion 211 and the third locking portion 213, are similar. Similarly, the relationship between the fourth locking portion 214 and the fifth locking portion 215 with respect to the first protector 41, and the relationship between the fifth locking portion 215 and the seventh locking portion 217, are also similar. In other words, in the engine 100, multiple locking portions 21 are provided on the periphery of the contact areas CR1 and CR2 so as to be positioned on either side of the protectors 41 and 42. As a result, the movement of the protectors 41 and 42 in the direction along the line connecting these two locking portions 21 can be suppressed by the two locking portions 21 positioned on either side of the protectors 41 and 42.

[0056] (5) As shown in Figure 10, the first locking portion 211 and the second locking portion 212 are provided in positions adjacent to the portion where multiple sides of the second protector 42 connect. The fourth locking portion 214, the fifth locking portion 215, and the seventh locking portion 217 are provided in positions adjacent to the portion where multiple sides of the first protector 41 connect. With this configuration, one locking portion 21 faces two sides of the protectors 41 and 42. Therefore, one locking portion 21 can suppress movement not only in one direction but also in multiple directions. Furthermore, the displacement of the protectors 41 and 42 in the rotational direction around an axis parallel to the Z-axis shown in Figure 10 can also be suppressed by these locking portions 21.

[0057] <Example of changes> This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0058] The portion of the locking part 21 that connects to the contact areas CR1 and CR2 does not necessarily have to be an inclined surface. If the locking part 21 is adjacent to the protectors 41 and 42, the movement of the protectors 41 and 42 is restricted by the protectors 41 and 42 contacting the side surface of the locking part 21. The displacement of the protectors 41 and 42 can be suppressed by the locking part 21.

[0059] The inclined surface does not need to be in constant contact with the protectors 41 and 42. If the locking portion 21 is adjacent to the protectors 41 and 42, the movement of the protectors 41 and 42 is restricted by the protectors 41 and 42 coming into contact with the side surface of the locking portion 21. The displacement of the protectors 41 and 42 can be suppressed by the locking portion 21.

[0060] - It is not necessary to arrange multiple locking parts 21 so as to sandwich the protectors 41 and 42. Depending on the shape of the protectors 41 and 42, the shape of the locking parts 21, and the position where the locking parts 21 are installed, if the locking parts 21 are provided adjacent to the sides of the protectors 41 and 42, the displacement of the protectors 41 and 42 can be sufficiently restricted.

[0061] The locking portion 21 does not necessarily have to be located adjacent to the portion where the two sides of the protectors 41 and 42 connect. Although a wire assembly 40 comprising two protectors 41 and 42 has been illustrated, the configuration of the wire assembly 40 is not limited to the configuration illustrated in the above embodiment. The engine 100 may be equipped with a wire assembly having only one protector. The engine 100 may also be equipped with a wire assembly having three or more protectors. Furthermore, the destination of the wire harness 30 is not limited to that illustrated in the above embodiment.

[0062] As an example of engine 100, a straight-four cylinder engine was shown. However, engine 100 is not limited to a straight-four cylinder engine. It may also be a three-cylinder engine. Furthermore, engine 100 may have five or more cylinders. Engine 100 may also have multiple cylinder banks.

[0063] <Note> The above embodiments and their modifications include the configurations described in the following appendix. [Note 1] An engine comprising a cylinder head, a wire assembly formed by holding a plurality of wire harnesses with a protector and arranging them into a shape suitable for routing, sound-absorbing material, and an engine cover that covers the wire assembly and the sound-absorbing material disposed on the cylinder head, wherein the engine cover is attached to the cylinder head with the wire assembly and the sound-absorbing material sandwiched between the cylinder head and the engine cover, causing the sound-absorbing material to be elastically deformed, the protector is held in a state pressed against the cylinder head by the restoring force of the sound-absorbing material, the sound-absorbing material has a locking portion at the peripheral edge of the contact area pressed against the protector that is thicker than the thickness of the contact area, and the locking portion is adjacent to the side surface of the protector.

[0064] [Note 2] The portion of the locking part that connects to the contact area becomes thinner as it approaches the contact area, forming an inclined surface, as described in [Note 1]. [Note 3] The engine as described in [Note 2], wherein the inclined surface of the sound-absorbing material is in contact with the protector.

[0065] [Note 4] The engine according to any one of [Note 1] to [Note 3], wherein a plurality of the locking portions are provided on the periphery of the contact area so as to be positioned on either side of the protector. [Note 5] The engine according to any one of [Note 1] to [Note 4], wherein the locking portion is provided at a position adjacent to the portion where the two sides of the protector connect. [Explanation of symbols]

[0066] 10…Engine cover 20…Sound-absorbing material 21... Locking part 30…Wire harness 40…Wire assembly 41, 42… Protector 50... Cylinder head 60...Cylinder block 100... Engine CR1,CR2…Contact area

Claims

1. Cylinder head and, A wire assembly in which multiple wire harnesses are held by protectors and bundled into a shape suitable for routing, Sound-absorbing material, The engine cover covers the wire assembly and sound-absorbing material disposed on the cylinder head, It is an engine equipped with, The engine cover is attached to the cylinder head with the wire assembly and the sound-absorbing material sandwiched between the cylinder head and the engine cover, causing the sound-absorbing material to be elastically deformed, and the protector is held in place by the restoring force of the sound-absorbing material, pressing against the cylinder head. When the direction from the cylinder head toward the engine cover is defined as upward, The sound-absorbing material has a contact area that is pressed against the upward-facing surface of the protector from the engine cover side, and a locking portion located at the periphery of the contact area and thicker than the thickness of the contact area. The locking portion is in contact with the side surface of the protector, which is a surface facing a direction perpendicular to the upward direction. engine.

2. The portion of the locking part that connects to the contact area becomes thinner as it approaches the contact area, forming an inclined surface. The engine according to claim 1.

3. The inclined surface of the sound-absorbing material is in contact with the protector. The engine according to claim 2.

4. Multiple locking portions are provided on the periphery of the contact area so as to be positioned on either side of the protector. The engine according to claim 1.

5. The locking portion is provided at a position adjacent to the portion where the two sides of the protector connect. The engine according to claim 1.

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