CN116438369A

CN116438369A - Auxiliary machine mounting structure of internal combustion engine

Info

Publication number: CN116438369A
Application number: CN202180053254.8A
Authority: CN
Inventors: 黑木友和; 松永礼俊
Original assignee: Mitsubishi Motors Corp
Current assignee: Mitsubishi Motors Corp
Priority date: 2020-08-28
Filing date: 2021-07-21
Publication date: 2023-07-14
Also published as: JP7364091B2; WO2022044638A1; JPWO2022044638A1

Abstract

An auxiliary machine mounting structure of an internal combustion engine fixes an auxiliary machine transmitting power between the internal combustion engines to the internal combustion engines through brackets. A housing is provided at an end of the internal combustion engine to cover an endless transmission member that transmits rotation of the crankshaft to the camshaft. The bracket has a bracket fixing portion that fixes the bracket to the internal combustion engine. The bracket fixing portion has a fixing portion to the housing and a fixing portion to the cylinder of the internal combustion engine. The bracket is fixed across the housing and the cylinder.

Description

Auxiliary machine mounting structure of internal combustion engine

Technical Field

The present disclosure relates to an auxiliary machine mounting structure of an internal combustion engine.

Background

Various auxiliary machines are mounted on an internal combustion engine (engine), and power is transmitted to auxiliary machines such as a generator and a water pump via a belt or a chain. In addition, an auxiliary machine is also known that starts an engine by a BSG (belt starter generator) or assists driving force of the engine.

Various proposals have been made regarding the mounting structure of these auxiliary machines on the engine. For example, patent document 1 shows an auxiliary machine mounting structure mounted to an internal combustion engine by a bracket, and shows a structure in which a housing of a water pump mounted to a side wall of a main body of the internal combustion engine doubles as a bracket for supporting an ACG (generator) as an auxiliary machine. Further, it is shown that bolt holes are formed in the housing bracket, through which bolts for fixing the housing bracket to the engine body are inserted, and that a substantially X-shaped reinforcing rib is formed so as to connect the bolt holes (see fig. 1 and 4 (a) of patent document 1).

Further, patent document 2 discloses a structure for supporting an alternator as an auxiliary machine for transmitting power from an engine main body through a belt, and a chain cover for supporting the alternator to cover a timing chain by a plurality of attachment portions protruding from a main body portion of the alternator. In addition, it is also shown that the alternator may support the engine body.

Patent literature

Patent document 1: japanese patent laid-open No. 2015-151863

Patent document 2: japanese patent laid-open publication No. 2018-66301

Disclosure of Invention

Technical problem to be solved by the invention

As described above, patent document 1 discloses a structure in which a housing of a water pump mounted on a side wall of an internal combustion engine main body doubles as a bracket for supporting an ACG (generator) serving as an auxiliary machine. Patent document 2 discloses that an alternator serving as an auxiliary machine supports a chain cover by a plurality of attachment portions, and that an engine main body can be supported.

However, in both patent document 1 and patent document 2, the auxiliary machine is fixed to the internal combustion engine by a bracket fixed across the chain cover and the cylinder block of the internal combustion engine.

On the other hand, driving force from the engine is applied to auxiliary machines such as a generator and a water pump. In addition, an auxiliary machine such as a BSG applies a larger force to drive the vehicle by the driving force of the BSG starting engine or the auxiliary engine. For this reason, in fixing the auxiliary machine to the bracket of the engine, strength to be firmly fixed to the engine is required.

In view of the above, it is an object of at least one embodiment of the present invention to provide an auxiliary machine mounting structure of an internal combustion engine capable of fixing a bracket for fixing an auxiliary machine to an internal combustion engine, the bracket being capable of fixing the auxiliary machine and the bracket to the engine so as to straddle a housing and a cylinder that cover an endless transmission member of the internal combustion engine.

(1) In order to achieve the above object, at least one embodiment of the present invention is an auxiliary machine mounting structure for an internal combustion engine, in which an auxiliary machine that transmits power between internal combustion engines is fixed to the internal combustion engines by a bracket, wherein a housing that covers an endless transmission member that transmits rotation of a crankshaft to a camshaft is provided at an end portion of the internal combustion engine, the bracket has a bracket fixing portion that fixes the bracket to the internal combustion engine, the bracket fixing portion has a fixing portion to the housing and a fixing portion to a cylinder of the internal combustion engine, and the bracket is fixed across the housing and the cylinder.

According to this configuration, since the bracket is fixed across the housing and the cylinder, the load applied to the auxiliary machine is dispersed to the housing side and the cylinder side by the bracket. As a result, the auxiliary machine and the bracket can be firmly fixed to the internal combustion engine (engine).

In addition, since the bracket is fixed across the housing and the cylinder, the bracket can enhance the coupling of the housing and the cylinder, and the coupling rigidity of the housing and the cylinder can be improved. Accordingly, the oil can be suppressed from leaking out from between the housing and the cylinder. In addition, the generation of noise and vibration can be suppressed.

(2) In various embodiments, the bracket has an auxiliary machine mounting portion that mounts the auxiliary machine on the bracket, the auxiliary machine mounting portion being located on each of the case side and the cylinder side.

According to this configuration, since the auxiliary machine mounting portion for mounting the auxiliary machine to the bracket is provided on each of the case side and the cylinder side, the mounting of the auxiliary machine to the bracket can be stabilized.

(3) In various embodiments, the bracket is provided with a reinforcing rib to connect a plurality of the auxiliary machine mounting portions, the reinforcing rib being provided so as to straddle the case side and the cylinder side.

According to this structure, since the reinforcing rib is provided to connect a portion (auxiliary machine mounting portion) to which a large force is applied during operation of the auxiliary machine, the strength of the bracket can be ensured. Further, since the reinforcing beads are provided so as to straddle the case side and the cylinder side, the joint rigidity of the case and the cylinder can be improved.

(4) In various embodiments, the reinforcing rib is formed to extend in an X-shape with the bracket fixing portion as an intersection point.

According to this structure, by disposing the bracket fixing portion at the intersection (center) of the reinforcing beads, the fixing of the bracket to the internal combustion engine is stabilized, and the strength of the bracket is ensured. Further, since the reinforcing rib extends from the bracket fixing portion, displacement of the housing with respect to the cylinder can be suppressed.

(5) In the embodiments, the bolt fixing direction of the bracket at least one portion of the plurality of bracket fixing portions with respect to the internal combustion engine is configured to be different from the bolt fixing direction of the other portion.

According to this structure, the fixation of the bracket is stable not only for load input from a specific one direction but also for input from a different direction.

(6) In various embodiments, the auxiliary machine mounting portion for mounting the auxiliary machine to the bracket is provided at a position between the bracket fixing portions having two portions of mutually different bolt fixing directions when viewed from the front of the bracket.

According to this configuration, since the auxiliary machine mounting portion is provided at a position between the bracket fixing portions that are sandwiched between two portions having mutually different bolt fixing directions, even if a large force is applied to the auxiliary machine mounting portion during operation of the auxiliary machine, vibration of the auxiliary machine can be suppressed. In addition, by sandwiching the auxiliary machine mounting portion between the bracket fixing portions fixed from mutually different directions, the mounting of the auxiliary machine mounting portion is more stable.

(7) In various embodiments, a delivery pipe for supplying fuel to the internal combustion engine is disposed between the bracket and the cylinder block.

According to this structure, at the time of a vehicle collision, the delivery pipe is protected by the bracket and the auxiliary machine mounted on the bracket.

Effects of the invention

According to at least one embodiment of the present invention, the auxiliary machine and the bracket can be firmly fixed to the engine by fixing the bracket that fixes the auxiliary machine to the internal combustion engine across the housing and the cylinder block that cover the endless transmission member of the internal combustion engine.

Drawings

Fig. 1 is a schematic side view of an engine in a state in which a bracket is attached to an auxiliary attachment structure of an internal combustion engine according to an embodiment of the present invention.

Fig. 2 is a schematic front view of the engine showing a state of tension of a belt driving an auxiliary machine.

Fig. 3 is an enlarged perspective view of a main portion from the front of the engine showing the mounting state of the bracket.

Fig. 4 is an enlarged perspective view of a main portion from the rear of the engine showing the mounting state of the bracket.

Fig. 5 is an enlarged perspective view of a main portion from the front of the engine showing a state in which the BSG is mounted on the bracket.

Fig. 6 is a schematic side view of the engine showing a state where the delivery pipe overlaps the bracket and the BSG.

[ symbolic description ]

1. Engine (internal combustion engine)

3. Engine main body

5. Crankshaft

7. Cylinder body

9. Cylinder cover

10. Air intake manifold

11. Chain box (Shell)

13. Oil pan

14. 47, 49, 55 fixing bolts

15. Timing chain (Ring drive component)

17. Crankshaft sprocket

19. Crank pulley

21. Auxiliary machine

23. Auxiliary machine belt

25 BSG (Belt type starter generator)

27. Water pump for engine cooling water

29 A/C (compressor for air conditioner)

41. Support frame

57. Screw hole

59. 61 reinforcing rib

63. Conveying pipe

65. Fuel pressure sensor

P-bracket fixing part

P1 first fixed point

P2 second fixed point

P3 third fixed point

P4 fourth fixed point

P5 fifth fixed point

Q auxiliary machine mounting part

Q1 first mounting point

Q2 second mounting point

Q3 third mounting point

Q4 fourth mounting point

Boundary line A-A

H section line part

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the relative arrangement of the constituent members described in the embodiments or shown in the drawings is not intended to limit the scope of the present invention, and is merely an illustrative example. The direction of the upper, lower, front, rear, left, and right in the description is defined by the direction of the driver looking forward from the driver's seat. In each figure, "FR" indicates front, "RH" indicates right, and "UPR" indicates upper.

Fig. 1 is a schematic side view of an engine 1 showing an auxiliary attachment structure of an internal combustion engine (engine) 1 according to an embodiment of the present invention. In fig. 1, an engine 1 is housed in an engine room in front of a vehicle, not shown, and is supported on a frame by an engine mount.

The engine 1 is, for example, an in-line multi-cylinder gasoline engine, and the crankshaft 5 of the engine body 3 is a transverse engine extending in the vehicle width direction. Fig. 1 shows a state in which the front side of the engine body 3 is disposed on the right side of the vehicle. Fig. 1 is a side view of an engine 1 from the front side of the vehicle.

The engine body 3 has a cylinder block 7 and a cylinder head 9 at an upper portion of the cylinder block 7 thereof. A chain case (housing) 11 is coupled to the front side of the engine body 3, and an oil pan 13 is provided to the lower side of the engine body 3.

The chain case 11 is fixed to the front surfaces of the cylinder block 7 and the cylinder head 9 by a plurality of fixing bolts 14 so as to cover the front sides of the cylinder block 7 and the cylinder head 9. In addition, an intake manifold 10 is provided to the cylinder head 9.

A chain case chamber is formed in the inner space of the chain case 11, and a timing chain 15 as an endless transmission member is disposed in the chain case chamber, and the timing chain 15 transmits rotation of the crankshaft 5 disposed in the cylinder block 7 to a not-shown camshaft disposed in the cylinder head 9.

The timing chain 15 is wound around a camshaft sprocket 17 that is coupled to a front end portion of a camshaft, not shown, on the intake side and the exhaust side, and the crankshaft sprocket 17 is coupled to a front end portion of the crankshaft 5. Accordingly, the timing chain 15 moves in conjunction with the rotation of the crankshaft 5, and the rotation is transmitted to the camshaft sprocket, whereby the camshaft rotates.

Further, the crankshaft sprocket 17 protrudes from the front end surface of the chain case 11 at the front end side, and a crankshaft pulley 19 is coupled to the protruding portion. The crank pulley 19 is wound with an auxiliary belt 23, and the auxiliary belt 23 transmits driving force to the auxiliary machine 21 or transmits driving force from the auxiliary machine 21 to the engine 1.

As shown in fig. 2, for example, the auxiliary machine 21 includes a BSG (belt starter generator) 25, an engine coolant water pump 27, and an a/C (air conditioner compressor) 29, which are connected to the crank pulley 19 via an auxiliary machine belt 23.

The pendulum belt tensioner 35 having

tension pulleys

33a and 33b rotatable on the upstream side and the downstream side in the rotation direction of the BSG pulley 31 is provided so as to swing around the same rotation axis as the BSG pulley 31, and the tension of the auxiliary belt 23 is kept constant.

Idler pulleys 37 and 39 for securing the winding angle of the auxiliary belt 23 are provided between the water pump 27 and the BSG pulley 31 and between the a/C29 and the crank pulley 19.

When the engine is started, the BSG25 operates as a starter motor, and the engine 1 is started, and when the engine is operated, the water pump 27 and the a/C29 are driven by the driving force of the engine 1, and the BSG25 is driven to generate electric power. Further, by driving the BSG25 when the engine is running, torque assistance is performed when accelerating the vehicle.

Next, a bracket 41 for fixing the BSG25 as an auxiliary to the side wall of the engine 1 will be described. As shown in fig. 1 and 3, the bracket 41 is formed of one metal member, and as shown in fig. 4, has a curved shape portion 43, and the curved shape portion 43 is curved toward an outer opening of the engine 1 when viewed in the front-rear direction of the engine 1 so as to hold a main body portion of the BSG25 having a substantially cylindrical shape. Fig. 4 shows a state before the BSG25 is mounted on the bracket 41, and fig. 5 shows a state in which the BSG25 is mounted on the bracket 41.

As shown in fig. 1 and 3, the bracket 41 has a bracket fixing portion P for fixing the bracket 41 to the chain case 11 and the cylinder 7, respectively, and for fixing the bracket across the chain case 11 and the cylinder 7. The bracket fixing portion P includes first to fifth fixing points P1 to P5 described later.

As fixing portions to the cylinder 7 in the bracket fixing portion P, four positions of a first fixing point P1, a second fixing point P2, a third fixing point P3, and a fourth fixing point P4 fixed to the side wall of the cylinder 7 are provided. As a fixing portion to the chain case 11 in the bracket fixing portion P, one position of a fifth fixing point P5 fixed to the side wall of the chain case 11 is provided.

In this way, the bracket 41 is provided with the bracket fixing portion P having fixing portions for fixing the bracket 41 to the chain case 11 and the cylinder 7, respectively, and since the bracket 41 is fixed across the chain case 11 and the cylinder 7, the load applied to the BSG25 as an auxiliary machine is dispersed to the chain case 11 side and the cylinder 7 side by the bracket 41. As a result, the BSG25 and the bracket 41 can be firmly fixed to the engine 1.

In the case of an auxiliary machine such as the BSG25, the engine 1 is started, and the vehicle is moved to assist the driving force of the engine 1, and a large force is applied to the bracket 41 as compared with the auxiliary machine of the water pump 27 and the a/C29, so that a strong strength is required for the bracket 41 supporting the BSG 25. Accordingly, the bracket 41 of the present invention is suitable for the fixation of the BSG 25.

Further, since the bracket 41 is fixed across the chain case 11 and the cylinder 7, the bracket 41 enhances the coupling of the chain case 11 and the cylinder 7, and can improve the coupling rigidity of the chain case 11 and the cylinder 7. Accordingly, the oil can be prevented from leaking out from between the chain case 11 and the cylinder 7. In addition, the generation of noise and vibration can be suppressed.

As shown in fig. 1 and 3, the bracket 41 is provided with four positions of a first fixing point P1, a second fixing point P2, a third fixing point P3, and a fourth fixing point P4 fixed to the side wall of the cylinder 7 and one position of a fifth fixing point P5 fixed to the side wall of the chain case 11. In the front view of the bracket 41 (side view of the engine 1 in a state where the bracket 41 is fixed to the engine 1), the positions of the first to fifth fixing points P1 to P5 are provided at the peripheral edge portion of the bracket 41.

In this way, in the front view shape of the bracket 41, since each fixing point position is provided at the peripheral edge portion of the bracket 41, that is, since the end portion of the bracket 41 is fixed, the fixing of the bracket 41 to the engine 1 is stabilized.

As shown in fig. 1 and 3, the first, second, third, and fifth fixing points P1, P2, P3, and P5 are fixed to each other from the front side of the vehicle (from the side of the engine 1) by fixing bolts 47, and the fourth fixing point P4 is fixed to the fixing bolts 49 from the right side of the vehicle (from the front side of the engine 1).

The fourth fixing point P4 is provided at a portion thereof with a protrusion 51, and a through hole through which the fixing bolt 49 passes is formed in the protrusion 51 so that a side wall of the cylinder 7 protrudes outward, and one arm 53a and the other arm 53b are provided on the bracket 41 so as to sandwich the protrusion 51 from both sides.

The fixing bolt 49 is inserted from the side surface of one arm 53a, penetrates the inside of the protruding portion 51, and is screwed to a nut portion provided on the side surface of the other arm 53 b. In this way, in the fourth fixing point P4, the bracket 41 is fixed to the cylinder 7 from the right side of the vehicle (from the front side of the engine 1) by the fixing bolt 49.

Since the fixing direction of the fixing bolt 49 for fixing the bracket 41 to the engine 1 is different from the fixing direction of the fixing bolt 47 at the other part in this way, the fixing of the bracket 41 is stable not only for the input of the load from the specific 1 direction but also for the input from the different direction.

Next, an auxiliary device mounting portion Q for mounting the BSG25 as an auxiliary device to the bracket 41 will be described. The auxiliary machine mounting portion Q includes first to fourth mounting points Q1 to Q4 described later.

As shown in fig. 1 and 3, four portions of a first mounting point Q1, a second mounting point Q2, a third mounting point Q3, and a fourth mounting point Q4 are provided as the auxiliary machine mounting portion Q. Screw holes 57 are formed in the mounting points Q1, Q2, Q3, Q4 of the auxiliary machine mounting portion Q, and the screw holes 57 are screwed with the fixing bolts 55 to which the BSG25 is mounted.

As shown in fig. 3 and 4, the auxiliary device mounting portion Q is provided at the opening end of the curved portion 43 of the bracket 41, and is located above and below the bracket 41, respectively. The first mounting point Q1 and the second mounting point Q2 are located at the upper side, and the third mounting point Q3 and the fourth mounting point Q4 are located at the lower side.

The auxiliary machine mounting portion Q is provided at two left and right positions in each of the upper and lower positions. The left and right parts are located at one side of the chain case 11 and one side of the cylinder 7, respectively. In fig. 1, one side of the chain case 11 and one side of the cylinder 7 are bounded by a boundary line A-A. The first mounting point Q1 and the third mounting point Q3 are located on one side of the chain case 11, and the second mounting point Q2 and the fourth mounting point Q4 are located on one side of the cylinder 7.

In this way, the auxiliary machine mounting portions Q are provided at the upper and lower positions, respectively, and further, by being provided at the side of the chain case 11 and the side of the cylinder 7 in the left and right directions, the mounting of the BSG25 to the bracket 41 can be stabilized.

As shown in fig. 1 and 3, a stiffener 59 is provided on the bracket 41 so as to connect the first mounting point Q1 and the fourth mounting point Q4, and a stiffener 61 is provided so as to connect the second mounting point Q2 and the third mounting point Q3. Further, these reinforcing

ribs

59, 61 are provided so as to straddle one side of the chain case 11 and one side of the cylinder 7.

In this way, since the reinforcing

ribs

59 and 61 are provided to connect portions (auxiliary machine mounting portions Q) to which a large force is applied during operation of the BSG25, the strength of the bracket 41 can be ensured. Further, since the reinforcing

ribs

59, 61 are provided so as to straddle the side of the chain case 11 and the side of the cylinder 7, the coupling rigidity of the chain case 11 and the cylinder 7 can be effectively improved. That is, the bracket 41 reinforced by the reinforcing

ribs

59, 61 further improves the bonding strength of the chain case 11 and the cylinder 7, and thus the bonding rigidity is effectively improved.

As shown in fig. 1 and 3, the reinforcing

ribs

59 and 61 are formed to extend in an X-shape with the second fixing point P2 in the bracket fixing portion P as an intersection point.

By disposing the second fixing point P2 of the bracket fixing portion P at the intersection (center) of the reinforcing

ribs

59, 61 in this way, the fixing of the bracket 41 to the engine 1 (the cylinder 7 and the chain case 11) is stabilized, and the strength of the bracket 41 is ensured. Further, since the reinforcing

ribs

59 and 61 extend from the second fixing point P2 of the bracket fixing portion P, the coupling rigidity of the chain case 11 to the cylinder 7 can be improved.

As shown in fig. 1 and 3, in front view of the bracket 41, the auxiliary device mounting portion Q is provided at a position between bracket fixing portions P that are sandwiched between two portions having mutually different fixing directions of the fixing

bolts

47 and 49.

That is, the third mounting point Q3 of the auxiliary machine mounting portion Q is located between the second fixing point P2 and the fourth fixing point P4 of the bracket fixing portion P in the up-down direction, and the fourth mounting point Q4 of the auxiliary machine mounting portion Q is located between the third fixing point P3 and the fourth fixing point P4 of the bracket fixing portion P in the up-down direction.

In this way, since the third mounting point Q3 of the auxiliary machine mounting portion Q is provided at a position between the second fixing point P2 and the fourth fixing point P4 of the bracket fixing portion P sandwiched between two portions having mutually different bolt fixing directions, and the fourth mounting point Q4 of the auxiliary machine mounting portion Q is provided at a position between the third fixing point P3 and the fourth fixing point P4 of the bracket fixing portion P sandwiched between two portions having mutually different bolt fixing directions, even when a large force is applied to the third mounting point Q3 and the fourth mounting point Q4 of the auxiliary machine mounting portion Q at the time of operation of the BSG25, vibration of the BSG25 can be suppressed.

In addition, the third mounting point Q3 and the fourth mounting point Q4 are clamped between bracket fixing portions fixed in mutually different directions, so that the mounting of the BSG25 at the third mounting point Q3 and the fourth mounting point Q4 is more stable.

In addition, since a larger force is easily applied to the lower mounting point than to the upper mounting point during operation of the BSG25, the auxiliary mounting portion Q sandwiched between the bracket fixing portions P having two portions in different bolt fixing directions can effectively suppress vibration of the BSG25 by using the lower side of the BSG25 as the third mounting point Q3 and the fourth mounting point Q4 for mounting on the bracket 41.

The bracket fixing portion P having two portions with mutually different bolt fixing directions may be provided so as to sandwich the auxiliary machine mounting portion Q, or may be provided so as to sandwich the first mounting point Q1 and the second mounting point Q2, or may be provided so that the upper side of the BSG25 is provided with respect to the first mounting point Q1 and the second mounting point Q2 for the auxiliary machine mounting portion Q mounted on the bracket 41, and the lower side of the BSG25 is provided with respect to the third mounting point Q3 and the fourth mounting point Q4 for the auxiliary machine mounting portion Q mounted on the bracket 41, respectively.

As shown in fig. 1, 4, and 6, a delivery pipe 63 for supplying fuel to the engine 1 is disposed between the bracket 41 and the cylinder 7. That is, one end portion of the delivery pipe 63 that supplies fuel to the in-cylinder fuel injection valve, not shown, is located between the bracket 41 and the cylinder 7. In addition, the delivery pipe 63 is provided with a fuel pressure sensor 65.

Fig. 6 is a schematic side view of the engine of fig. 1, showing a state in which the BSG25 is attached, and has the same configuration as that shown in fig. 1, except that the BSG25 and the BSG pulley 31 are shown by two-dot chain lines.

When the BSG25 is attached to the bracket 41, as shown by a section line H in fig. 6, one end of the delivery pipe 63 is disposed between the bracket 41 and the BSG25, and the cylinder 7, and one end of the delivery pipe 63 is covered by the bracket 41 and the BSG 25.

Although the delivery pipe 63 shows an example of a delivery pipe that supplies fuel to the in-cylinder fuel injection valve, the delivery pipe may be a delivery pipe that supplies fuel to the intake passage fuel injection valve.

In this way, since the delivery pipe 63 for supplying fuel to the engine 1 is disposed between the bracket 41 and the cylinder 7, when the BSG25 is mounted on the bracket 41, one end portion of the delivery pipe 63 is covered by the bracket 41 and the BSG 25. Thus, in the event of a vehicle collision, the delivery tube 63 may be protected by the bracket 41 and the BSG25 mounted on the bracket 41.

In the above embodiment, an example in which the endless transmission member is the timing chain 15 is shown, but may be a timing belt.

The present application is based on Japanese patent application laid-open No. 2020-144217 filed 8/28 in 2020, the contents of which are incorporated herein by reference.

Industrial applicability

According to at least one embodiment of the present invention, the bracket 41 for fixing the BSG25 as an auxiliary to the engine 1 is fixed across the chain case 11 and the cylinder block 7 of the engine 1, whereby the BSG25 and the bracket 41 can be firmly fixed to the engine 1, and the present invention is suitable for use as an auxiliary mounting structure of the engine.

Claim (modification according to treaty 19)

1. An auxiliary machine mounting structure of an internal combustion engine, which fixes an auxiliary machine transmitting power between internal combustion engines to the internal combustion engines through a bracket, characterized in that,

a housing covering an endless transmission member that transmits rotation of a crankshaft to a camshaft is provided at an end portion of the internal combustion engine,

the bracket has a bracket fixing portion that fixes the bracket to the internal combustion engine,

the bracket fixing portion has a fixing portion to the housing and a fixing portion to a cylinder block of the internal combustion engine,

the bracket is fixed across the housing and the cylinder,

the bracket is provided with a reinforcing rib crossing the housing and the cylinder body.

2. The auxiliary mounting structure of an internal combustion engine according to claim 1, wherein the bracket has an auxiliary mounting portion that mounts the auxiliary on the bracket,

the auxiliary machine mounting portion is located on each of the case side and the cylinder side.

3. The auxiliary machine mounting structure of an internal combustion engine according to claim 2, wherein the reinforcing bead is provided to connect a plurality of the auxiliary machine mounting portions,

the reinforcing bead is provided astride the housing side and the cylinder side.

4. The auxiliary attachment structure for an internal combustion engine according to claim 3, wherein the reinforcing bead is formed to extend in an X-shape with the bracket fixing portion as an intersection point.

5. The auxiliary machine mounting structure of an internal combustion engine according to any one of claims 1 to 4, wherein a bolt fixing direction of the bracket with respect to the internal combustion engine at least one portion of the plurality of bracket fixing portions is different from a bolt fixing direction of other portions.

6. The auxiliary attachment structure of an internal combustion engine according to claim 5, wherein an auxiliary attachment portion for attaching the auxiliary to the bracket is provided at a position between the bracket fixing portions having two portions of mutually different bolt fixing directions when viewed from the front of the bracket.

7. The auxiliary machine mounting structure of an internal combustion engine according to any one of claims 1 to 6, wherein a delivery pipe that supplies fuel to the internal combustion engine is arranged between the bracket and the cylinder block.

Claims

the bracket is fixed across the housing and the cylinder.

3. The auxiliary machine mounting structure of an internal combustion engine according to claim 2, wherein the bracket is provided with a reinforcing rib to connect a plurality of the auxiliary machine mounting portions,