Internal combustion engine

Abstract

To protect a fuel supply pipe and reduce the number of components.SOLUTION: An internal combustion engine 10 includes: a delivery pipe 33 attached to a head cover 13; a bracket 50 protecting the delivery pipe 33; and relay wiring 70. The bracket 50 includes: a base 51 that is fixed to the cylinder head 12; and a main wall portion 52 that rises from the base 51 and has an upper end located above an upper end of the head cover 13. The relay wiring 70 is attached to the bracket 50.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This invention relates to an internal combustion engine.

Background Art

[0002] The internal combustion engine disclosed in Patent Document 1 is located within the engine room. The internal combustion engine includes a cylinder head that houses a valve operating mechanism and the like, a head cover that covers the cylinder head, and a high-pressure fuel pump. A part of the high-pressure fuel pump protrudes from the upper surface of the head cover. Further, the internal combustion engine has a protective protector. The protector is disposed around the portion of the high-pressure fuel pump that protrudes from the head cover. The protector prevents components within the engine room from hitting the high-pressure fuel pump when the vehicle collides.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to protect the components of the fuel supply system, it is necessary to provide a protector as in Patent Document 1. However, various brackets for attaching various components are also required to be provided around the cylinder head and the head cover. Here, there is a certain limit to the space for providing these brackets and the like on the cylinder head and the head cover. Therefore, depending on the layout of the internal combustion engine, there is a possibility that both the requirements for protecting the components of the fuel supply system and the attachment of other necessary components cannot be satisfied.

Means for Solving the Problems

[0005] An internal combustion engine for solving the above problems includes a cylinder block having cylinders, a cylinder head fixed to the cylinder block, a head cover covering the cylinder head, an injector for injecting fuel, a fuel supply pipe attached to the head cover and supplying fuel to the injector, a bracket for protecting the fuel supply pipe, and a wiring extending from a sensor. The bracket has a base fixed to one or more selected from the cylinder block, the cylinder head, and the head cover, and a main wall portion rising from the base and having an upper end positioned above the upper end of the head cover. The wiring is attached to the bracket.

[0006] Suppose there is a collision with the vehicle from the side opposite to the fuel supply pipe across the bracket. And suppose that due to this collision, the components in the engine room move toward the fuel supply pipe. According to the above configuration, these components will hit the bracket before hitting the fuel supply pipe. Therefore, the presence of the bracket can avoid the collision of the above components against the fuel supply pipe. By this, damage to the fuel supply pipe can be prevented. Moreover, in the above configuration, the bracket also serves as a component for attaching the wiring. Therefore, since there is no need to separately provide a bracket dedicated to attaching the wiring, etc., the number of components can be reduced.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0008] Hereinafter, an embodiment of an engine room structure that houses an internal combustion engine will be described with reference to the drawings. In this embodiment, up / down, front / rear, and left / right are defined with reference to the vehicle. Also, hereinafter, for example, the upper side will simply be referred to as the "upper side". Here, the upper side as viewed from a certain position refers to all regions that exist above not only the vertical axis passing through that position but also the virtual plane including that position and including front / rear, left / right. Although the upper side has been described as an example here, the same applies to other directions.

[0009] <Schematic Configuration of Internal Combustion Engine> As shown in FIG. 1, a hybrid vehicle (hereinafter simply referred to as "vehicle") 1 has an engine room 2. The engine room 2 is a space partitioned in the front part of the vehicle 1. The engine room 2 is a space partitioned by a radiator core support, a dash panel, left and right side members, etc.

[0010] Vehicle 1 has an internal combustion engine 10. The internal combustion engine 10 is located within the engine room 2. As shown in FIG. 2, the internal combustion engine 10 has an engine body 10A. The engine body 10A has an oil pan, a cylinder block 11, a cylinder head 12, and a head cover 13. The oil pan, the cylinder block 11, the cylinder head 12, and the head cover 13 are stacked one above the other in this order. The cylinder block 11 is generally rectangular parallelepiped-shaped as a whole. A plurality of cylinders 11A are partitioned in the cylinder block 11. The number of cylinders 11A is four. As shown in FIG. 1, the four cylinders 11A are arranged side by side in the front-rear direction. That is, the crankshaft of the internal combustion engine 10 extends in the front-rear direction of the vehicle 1. Hereinafter, when individually describing the four cylinders 11A, these are distinguished as the first cylinder #1, the second cylinder #2, the third cylinder #3, and the fourth cylinder #4 in order from the front. As shown in FIG. 2, the cylinder head 12 is generally rectangular parallelepiped-shaped as a whole. The cylinder head 12 is fixed to the upper surface of the cylinder block 11. The cylinder head 12 houses a valve operating mechanism such as a camshaft. Further, intake ports and exhaust ports connected to each cylinder 11A are partitioned in the cylinder head 12. The head cover 13 is rectangular box-shaped. The head cover 13 is open downward. That is, the opening surface of the box-shaped head cover 13 constitutes the lower end of the head cover 13. Also, the outer surface of the bottom of the box-shaped head cover 13 constitutes the upper end of the head cover 13. Hereinafter, this outer surface is referred to as the upper surface of the head cover 13. The head cover 13 covers substantially the entire upper surface of the cylinder head 12 from above.

[0011] As shown in FIG. 2, the internal combustion engine 10 has an exhaust pipe 19 and a plurality of state detection sensors 21. The exhaust pipe 19 is connected to the exhaust port of the cylinder head 12. High-temperature exhaust discharged from the cylinder 11A flows through the exhaust pipe 19. A specific portion that is part of the exhaust pipe 19 is located on the right side with respect to the engine body 10A and on the lower side with respect to the lower end of the head cover 13. Two state detection sensors 21 are provided. Each state detection sensor 21 is attached to the specific portion of the exhaust pipe 19. The state detection sensor 21 is a sensor that detects the state of the exhaust. One of the state detection sensors 21 is an air-fuel ratio sensor that detects the air-fuel ratio of the exhaust. The other state detection sensor 21 is a temperature sensor that detects the temperature of the exhaust. Although not shown in the figure, the internal combustion engine 10 has an intake pipe through which intake air flows. The intake pipe is connected to the intake port of the cylinder head 12.

[0012] As shown in FIG. 2, the internal combustion engine 10 has a plurality of relay wirings 70. The relay wirings 70 are provided for each state detection sensor 21. Each relay wiring 70 has a linear wiring body 71 and a connector 72 connected to an end of the wiring body 71. The connector 72 is a connecting component that enables conduction with another wiring. The connector 72 can be fitted with a connector of another wiring. The end of the wiring body 71 on the side opposite to the connector 72 is connected to the state detection sensor 21. That is, the wiring body 71 extends from the state detection sensor 21.

[0013] As shown in FIG. 1, the internal combustion engine 10 has a plurality of ignition devices 18. The ignition devices 18 are provided for each cylinder 11A. Each ignition device 18 is located directly above the target cylinder 11A. Each ignition device 18 is attached to the head cover 13. As shown in FIG. 2, each ignition device 18 extends vertically. The tip of the ignition device 18 is located inside the cylinder 11A.

[0014] As shown in FIG. 1, the internal combustion engine 10 has a high-pressure fuel pump 31. The high-pressure fuel pump 31 is attached to the head cover 13. The high-pressure fuel pump 31 is located at the rear corner on the right side in the head cover 13. A part of the high-pressure fuel pump 31 protrudes upward from the upper surface of the head cover 13. The portion of the high-pressure fuel pump 31 that protrudes from the upper surface of the head cover 13 is covered from above by a dedicated protector 31A. The high-pressure fuel pump 31 receives fuel supply from a fuel tank (not shown). The high-pressure fuel pump 31 is driven by a camshaft to pressurize the fuel. Note that the illustration of the high-pressure fuel pump 31 is omitted in FIG. 2.

[0015] As shown in FIG. 1, the internal combustion engine 10 has a delivery pipe 33. The delivery pipe 33 is a hollow product. The delivery pipe 33 is attached to the head cover 13. The delivery pipe 33 is located above the upper surface of the head cover 13. The delivery pipe 33 is located near the center on the left and right sides in the head cover 13. The delivery pipe 33 is located on the left side with respect to the ignition device 18. The delivery pipe 33 extends linearly in the front-rear direction. The delivery pipe 33 extends over substantially the entire area from the front end to the rear end of the head cover 13. And, in a plan view from above, the delivery pipe 33 reaches from the first cylinder #1 to the fourth cylinder #4. Note that the delivery pipe 33 is located at substantially the same height from its front end to its rear end.

[0016] As shown in FIG. 1, the internal combustion engine 10 has a relay pipe 32. The relay pipe 32 is a hollow product. The relay pipe 32 connects the delivery pipe 33 and the high-pressure fuel pump 31. The relay pipe 32 is located above the upper surface of the head cover 13. Also, the relay pipe 32 is located on the right side with respect to the delivery pipe 33 and is located at the rear of the head cover 13. Specifically, the relay pipe 32 extends forward from the high-pressure fuel pump 31 and bends midway to connect to the specified position of the delivery pipe 33. The specified position is the portion between the third cylinder #3 and the fourth cylinder #4 in a plan view from above. Note that the uppermost part of the relay pipe 32 is located at substantially the same height as the upper end of the delivery pipe 33. Fuel pressurized by the high-pressure fuel pump 31 is supplied to the delivery pipe 33 via the relay pipe 32. Then, high-pressure fuel flows through the delivery pipe 33.

[0017] As shown in FIG. 1, the internal combustion engine 10 has a plurality of injectors 34. The injectors 34 are provided for each cylinder 11A. Each injector 34 is located directly above the corresponding cylinder 11A. Each injector 34 is attached to the delivery pipe 33. As shown in FIG. 2, each injector 34 extends downward from the delivery pipe 33. The tip of each injector 34 is located inside the cylinder 11A. Each injector 34 receives fuel supply from the delivery pipe 33. Each injector 34 injects fuel into the cylinder 11A. Note that the delivery pipe 33 and the relay pipe 32 constitute a fuel supply pipe that supplies fuel to each injector 34.

[0018] <Bracket> As shown in FIG. 1, the internal combustion engine 10 has a bracket 50. The bracket 50 is a component for protecting the fuel supply pipe. The bracket 50 is made of an iron-based material. As shown in FIG. 3, the bracket 50 is generally Z-shaped. Specifically, the bracket 50 has a base portion 51, a main wall portion 52, and an extension portion 53. The base portion 51 is in the shape of a rectangular flat plate. The main wall portion 52 is also in the shape of a rectangular flat plate. A specific side, which is one of the four sides of the main wall portion 52, is connected to a specific side, which is one of the four sides of the base portion 51. The dimension of the specific side of the main wall portion 52 is the same as that of the specific side of the base portion 51. Both ends of the specific side of the main wall portion 52 extend to both ends of the specific side of the base portion 51. The main wall portion 52 rises from the base portion 51. The main wall portion 52 is substantially orthogonal to the base portion 51. A side opposite to the specific side in the main wall portion 52 is referred to as a defined side. The defined side constitutes the upper end of the main wall portion 52. The extension portion 53 is in the shape of a rectangular flat plate. A specific side, which is one of the four sides of the extension portion 53, is connected to the defined side of the main wall portion 52. The dimension of the specific side of the extension portion 53 is the same as that of the defined side of the main wall portion 52. Both ends of the specific side of the extension portion 53 extend to both ends of the defined side of the main wall portion 52. The extension portion 53 extends from the main wall portion 52 to the side opposite to the base portion 51. The extension portion 53 is substantially orthogonal to the main wall portion 52. That is, the extension portion 53 protrudes from the defined side in a direction substantially orthogonal to the direction in which the main wall portion 52 rises from the base portion 51. As shown in FIG. 1, the dimensions of the specific sides of the base portion 51, the main wall portion 52, and the extension portion 53 are, for example, approximately the same as the diameter of the cylindrical cylinder 11A.

[0019] As shown in FIG. 3, the bracket 50 has a bolt hole H for bolt B. The bolt hole H is formed in the base portion 51. Although not shown, the bracket 50 has a screw hole for attaching the connector 72. The screw hole is formed in the extension portion 53.

[0020] The bracket 50 has ribs R. Two sides orthogonal to the specific side at the base 51 are called side edges. Similarly, two sides orthogonal to the specific side at the main wall portion 52 are called side edges. Similarly, two sides orthogonal to the specific side at the extension portion 53 are called side edges. The rib R rises from both side edges of the base 51. Further, the rib R protrudes from both side edges of the main wall portion 52 toward the base 51. Further, the rib R rises from both side edges of the extension portion 53. The rib R is continuous from the base 51 to the extension portion 53. The rigidity of the bracket 50 is enhanced by the rib R.

[0021] As shown in FIG. 2, the bracket 50 is located on the right side with respect to the engine body 10A. As shown in FIG. 1, in a plan view from above, the bracket 50 is located immediately to the right of the third cylinder #3. As shown in FIG. 2, the base 51 of the bracket 50 is located on the upper surface of the flange 12F provided on the cylinder head 12. The flange 12F projects outward from the upper end of the cylinder head 12. The flange 12F is plate-shaped. A bolt B passes through the base 51 and the flange 12F. The base 51 is fixed to the flange 12F by this bolt B. That is, the bracket 50 is fixed to the cylinder head 12. In a state where the base 51 is fixed to the flange 12F, the upper end of the main wall portion 52 is located above the upper end of the delivery pipe 33. And the extension portion 53 protrudes to the right from the upper end of the main wall portion 52. Connectors 72 of the respective relay wirings 70 are attached to the upper surface of the extension portion 53. Each connector 72 is screwed to the extension portion 53. As shown in FIG. 1, the two connectors 72 are arranged side by side in the front-rear direction. A connector of a wiring W extending from an engine control device mounted on the vehicle 1 is fitted to each connector 72. The engine control device is a control device that controls the internal combustion engine 10. In the drawings, the illustration of the engine control device is omitted.

[0022] <Other configurations> As shown in FIG. 1, the vehicle 1 has a motor generator 3, an inverter 5, and a battery 7. The inverter 5 is electrically connected to both the motor generator 3 and the battery 7. The motor generator 3 and the battery 7 exchange power with each other via the inverter 5. The inverter 5 performs DC-AC conversion between the motor generator 3 and the battery 7. The inverter 5 is located in the engine room 2. In the present embodiment, the motor generator 3 and the battery 7 are located outside the engine room 2.

[0023] In the engine room 2, the engine body 10A of the internal combustion engine 10 and the inverter 5 are arranged side by side in the direction along the vehicle axle of the vehicle 1. That is, the engine body 10A of the internal combustion engine 10 and the inverter 5 are arranged side by side left and right. In the present embodiment, the inverter 5 is located on the right side of the engine body 10A. In a plan view from above, the inverter 5 is located adjacent to the right of the third cylinder #3. Due to the arrangement of the inverter 5 and the bracket 50, the main wall portion 52 of the bracket 50 is located between the inverter 5 and the delivery pipe 33 in the direction along the vehicle axle of the vehicle 1. Note that the inverter 5 has, for example, a rectangular parallelepiped shape. As shown in FIG. 2, the lower surface of the inverter 5 is located above the upper surface of the extension portion 53 of the bracket 50.

[0024] <Operation of the Embodiment> As described above, in the engine room 2, the inverter 5, which is a heavy object, is located diagonally upward to the right with respect to the engine body 10A. Here, assume that there is a collision from the right side with respect to the front portion of the vehicle 1. Then, the load associated with this collision acts on the inverter 5 in the engine room 2, and as shown by the arrow F in FIG. 2, assume that the inverter 5 moves toward the upper surface of the head cover 13. At this time, the bracket 50 functions to protect the delivery pipe 33 located on the upper surface of the head cover 13. That is, the bracket 50 is located on the right side with respect to the delivery pipe 33. From this, when the inverter 5 moves toward the delivery pipe 33, the bracket 50 can become an obstacle that blocks the movement of the inverter 5 in front of the delivery pipe 33. In particular, since the upper end of the main wall portion 52 of the bracket 50 is located above the upper end of the delivery pipe 33, the range within which the inverter 5 can collide with the main wall portion 52 and the extension portion 53 is wider. Therefore, the inverter 5 moving toward the delivery pipe 33 collides with the main wall portion 52 and the extension portion 53 of the bracket 50 before hitting the delivery pipe 33. Therefore, the presence of the bracket 50 can avoid the collision of the inverter 5 with respect to the delivery pipe 33. Further, the bracket 50 is located near the relay pipe 32 located toward the rear of the head cover 13. Therefore, the presence of the bracket 50 can also avoid the collision of the inverter 5 with respect to the relay pipe 32.

[0025] <Effects of the Embodiment> (1) As described in the above operation, in the internal combustion engine 10, the presence of the bracket 50 can prevent damage to the delivery pipe 33 and the relay pipe 32. Moreover, the bracket 50 also serves as a component to which the connector 72 in the relay wiring 70 is attached. Therefore, since it is not necessary to separately provide a bracket dedicated to attaching the connector 72 to the internal combustion engine 10, the number of parts of the internal combustion engine 10 can be reduced.

[0026] (2) In the internal combustion engine 10, the extension portion 53 of the bracket 50 is continuous from the upper end of the main wall portion 52. Therefore, the extension portion 53 is disposed at a higher position with respect to the engine body 10A. By attaching the connector 72 to this extension portion 53, the connector 72 can be disposed at a position farther from the engine body 10A that has become hot. This can prevent the connector 72 from deteriorating due to the influence of heat from the engine body 10A.

[0027] (3) In addition to (2), attaching the connector 72 to the extension portion 53 has the following advantages. That is, the bracket 50 including the extension portion 53 is located above the exhaust pipe 19. Therefore, by attaching the connector 72 to the bracket 50, the wiring body 71 connected to the connector 72 can be routed upward away from the exhaust pipe 19 without being routed along the exhaust pipe 19. Therefore, it is possible to prevent the wiring body 71 from deteriorating due to the influence of heat from the exhaust pipe 19.

[0028] <Modified Example> The above embodiment can be modified as follows. The above embodiment and the following modified examples can be combined with each other within a technically non - conflicting range.

[0029] · The collision - resistant component against the delivery pipe 33 is not limited to the inverter 5. In the engine room 2, other components other than the inverter 5 may move toward the delivery pipe 33. The bracket 50 may also protect the delivery pipe 33 from such other components.

[0030] · The material of the bracket 50 is not limited to the example of the above embodiment. No matter what the material of the bracket 50 is, compared with the case where the bracket 50 does not exist, when there is a collision against the vehicle 1, the bracket 50 can suppress the movement of the components in the engine room 2 accompanying the collision.

[0031] · The shape and dimensions of the bracket 50 are not limited to the examples of the above embodiments. For example, the extension portion 53 does not have to be substantially orthogonal to the main wall portion 52, and may intersect the main wall portion 52 so as to go obliquely upward to the right as it moves away from the main wall portion 52. Further, the base portion 51, the main wall portion 52, and the extension portion 53 do not have to be plate-shaped, and may be block-shaped masses. Further, the upper end of the main wall portion 52 may be located below the upper end of the delivery pipe 33. Even in this case, the upper end of the main wall portion 52 only has to be located above the upper end of the head cover 13. For example, even when changes such as the above are made, as long as the bracket 50 exists, the collision components such as the inverter 5 can collide with the bracket 50 before colliding with the delivery pipe 33. And by that, the bracket 50 can suppress the movement of the collision components.

[0032] · The extension portion 53 may be omitted. In this case, the connector 72 may be attached to a portion of the bracket 50 other than the extension portion 53. For example, the connector 72 may be attached to the main wall portion 52.

[0033] · Without omitting the extension portion 53, the connector 72 may be attached to a portion of the bracket 50 other than the extension portion 53. · The object to which the bracket 50 is fixed is not limited to the cylinder head 12. For example, the bracket 50 may be fixed to the head cover 13. Further, a fixing structure of the bracket 50 may be provided on both the head cover 13 and the cylinder head 12, and the bracket 50 may be fixed to both of them. The bracket 50 only has to be fixed to one or more selected from the cylinder block 11, the cylinder head 12, and the head cover 13.

[0034] · The method of fixing the bracket 50 to the engine body 10A is not limited to using the bolt B. As the above fixing method, for example, welding may be used. Any method may be used as long as the bracket 50 can be fixed to the engine body 10A.

[0035] · The position of the bracket 50 with respect to the engine body 10A is not limited to the example of the above embodiment. The bracket 50 may be arranged at any position above, below, left, right, front, or rear of the engine body 10A. The bracket 50 only needs to be arranged such that the upper end of the main wall portion 52 is positioned above the upper end of the head cover 13.

[0036] · A plurality of brackets 50 may be provided for the internal combustion engine 10. · The method of attaching the connector 72 to the bracket 50 is not limited to using screwing. As the above attachment method, for example, claw fitting may be adopted. In this case, claws may be provided on either the connector 72 or the bracket 50, and holes or depressions into which the claws fit may be provided on the other. Any method may be used as long as the connector 72 can be attached to the bracket 50.

[0037] · When attaching the relay wiring 70 to the bracket 50, instead of or in addition to the connector 72, the wiring body 71 may be attached to the bracket 50. In this case, a structure for attaching the wiring body 71 may be provided on the bracket 50. Examples of such structures include a wall portion for winding the wiring body 71, a hook for hooking the wiring body 71, and a hole for passing the wiring body 71 through. An appropriate structure may be adopted to stably hold the wiring body 71.

[0038] · It is not essential for the relay wiring 70 to have the connector 72. Here, when connecting the wiring from the state detection sensor 21 to the engine control device and the wiring passes through the bracket 50 on the way, the position of the wiring can be stabilized by the bracket 50. If the wiring body 71 is attached to the bracket 50 as in the above modification example, the position of the wiring body 71 is thereby stabilized. In this case, even if the wiring body 71 is directly extended to the engine control device, the wiring can be routed at an appropriate position. Therefore, if the length of the wiring body 71 can be ensured accordingly, it is also possible to abolish the connector 72 and directly connect the wiring body 71 to the engine control device.

[0039] · The number of relay wirings 70 attached to the bracket 50 is not limited to the example of the above embodiment. There may be one relay wiring 70 or three or more relay wirings 70. · The state detection sensor 21 is not limited to the example of the above embodiment. The state detection sensor 21 may be, for example, a sensor that detects the exhaust pressure. The state detection sensor 21 may be any sensor that detects the state of the exhaust flowing through the exhaust pipe 19.

[0040] · The source of connection of the relay wiring 70 is not limited to the state detection sensor 21. The relay wiring 70 may extend from another sensor other than for the purpose of detecting the state of the exhaust. The sensor that is the source of connection of the relay wiring 70 may be any sensor that detects information about the internal combustion engine 10. The sensor may be, for example, a sensor that detects the amount of intake air flowing through the intake pipe, a sensor that detects the temperature of the intake air, or a sensor that detects the temperature of the cooling water that cools the engine body 10A.

[0041] · The object to which information is transmitted via the relay wiring 70 is not limited to the engine control device. Information may be transmitted to an object that requires information about the internal combustion engine 10. · The overall configuration of the internal combustion engine 10 is not limited to the example of the above embodiment. For example, the number of cylinders 11A may be changed from the example of the above embodiment. Also, the shape of the head cover 13 may be changed from the example of the above embodiment. The head cover 13 only needs to cover the cylinder head 12.

[0042] · Depending on the layout etc. of the internal combustion engine 10, the arrangement of the delivery pipe 33 and the relay pipe 32 may be different from the example of the above embodiment. Also, as a fuel supply pipe that supplies fuel to the injector 34, something other than these delivery pipe 33 and relay pipe 32 may be attached to the head cover 13. And depending on the positional relationship between the bracket 50 and the fuel supply pipe, a fuel supply pipe other than the delivery pipe 33 and the relay pipe 32 may be the object to be protected by the bracket 50. Any fuel supply pipe attached to the head cover 13 may be the object to be protected by the bracket 50.

[0043] · The arrangement of the internal combustion engine 10 in the engine room 2 is not limited to the example of the above embodiment. For example, the internal combustion engine 10 may be arranged such that the crankshaft extends left and right of the vehicle 1.

[0044] · The motor generator 3 and the battery 7 may be located in the engine room 2. · The vehicle 1 may not have the motor generator 3 as a drive source and may have only the internal combustion engine 10 as a drive source.

Explanation of reference numerals

[0045] 10…Internal combustion engine 11…Cylinder block 12…Cylinder head 13…Head cover 19…Exhaust pipe 21…State detection sensor 32…Relay pipe 33…Delivery pipe 34…Injector 50…Bracket 51…Base 52…Main wall portion 53…Extension portion 70…Wiring 71…Wiring body 72…Connector

Claims

1. A cylinder block having cylinders, a cylinder head fixed to the cylinder block, a head cover covering the cylinder head, an injector for injecting fuel, a fuel supply pipe attached to the head cover and supplying fuel to the injector, a bracket for protecting the fuel supply pipe, and a wiring extending from a sensor, The bracket has a base fixed to one or more selected from the cylinder block, the cylinder head, and the head cover, and a main wall portion rising from the base and having an upper end positioned above the upper end of the head cover. The wiring is attached to the bracket Internal combustion engine.

2. The bracket has an extension protruding from the upper end of the main wall portion in a direction intersecting the direction in which the main wall portion rises, The wiring has a linear wiring body and a connector connected to an end of the wiring body. The connector is attached to the extension The internal combustion engine according to claim 1.

3. Further comprising an exhaust pipe positioned below the lower end of the head cover, The wiring extends from the sensor which is attached to the exhaust pipe and detects the state of the exhaust flowing through the exhaust pipe. The internal combustion engine according to claim 1.

4. The upper end of the main wall portion is positioned above the fuel supply pipe. The internal combustion engine according to claim 1.

Images