JP6885240B2 - Internal combustion engine for vehicles - Google Patents

Description

The present invention relates to an internal combustion engine for vehicles.

The engine is provided with a belt tension adjusting device that applies tension to a drive belt that transmits power between the crankshaft and an auxiliary machine (see Patent Document 1).

This belt tension adjusting device is provided below the mount mounting portion that bulges outward from the chain case, and is supported by an arm that is swingably supported around a swing pin fixed to the engine and an end of the arm. It is provided with a tensioner pulley that is brought into contact with the drive belt, and an auto tensioner in which one end is connected to the arm and the other end is connected to the chain case to press the arm.

One end of the mount bracket is connected to the mount mounting portion, and the other end of the mount bracket is supported by the vehicle body via a mounting device.

Japanese Unexamined Patent Publication No. 2016-176436

In such a conventional belt tension adjusting device, the other end of the auto tensioner is connected to the chain case. Since the auto tensioner presses the tension pulley against the drive belt with a large force, a large stress acts on the chain case from the other end of the auto tensioner.

As a result, the chain case may bend, and the connecting force between the chain case and the engine body may decrease. In particular, when the other end of the auto tensioner is connected to a flat portion having low rigidity in the chain case, the flat portion tends to bend due to the stress acting on the flat portion of the auto tensioner, and the chain. The connecting force between the case and the engine body tends to decrease.

The present invention has been made by paying attention to the above circumstances, and it is possible to prevent the chain case from bending due to the stress applied from the tension applying member, and to reduce the connecting force between the chain case and the engine body. It is an object of the present invention to provide an internal combustion engine for a vehicle that can be prevented.

The present invention comprises an engine body having a crank shaft, a case member connected to an end portion of the engine body, a vibration-proof mount member having a mount-side connecting portion and provided on the vehicle body side, and the case member. A bulging portion that bulges toward the vibration-proof mount member and has a case-side connecting portion at the upper portion, a drive belt provided below the bulging portion and transmitting power from the crank shaft to an auxiliary machine, and the above. The tension applying member is provided below the bulging portion and includes a tension applying member for applying tension to the drive belt and a mount bracket for connecting the case side connecting portion and the mount side connecting portion. A tensioner pulley that comes into contact with the drive belt and a tensioner connecting portion provided at one end are connected to the case member, and the tensioner pulley is provided at the other end side to press the tensioner pulley against the drive belt. An internal combustion engine for a vehicle provided with a tensioner member, the case member has a front boss portion located below the bulge portion and a front boss portion located below the bulge portion. On the other hand, a rear boss portion located rearward in the front-rear direction of the vehicle is formed, and the mount bracket has an intermediate connecting portion and is connected to the case-side connecting portion with a first mounting bracket. It is divided into a second mount bracket that connects the intermediate connecting portion and the mounting side connecting portion, and the first mounting bracket has an upper wall portion whose base end side is connected to the case side connecting portion. A vertical wall portion extending downward from the upper wall portion and having a lower end portion in an extending direction connected to the front boss portion and the rear boss portion is provided, and the front boss portion and the rear boss portion A first virtual plane extending in the front-rear direction of the vehicle across the vehicle, a second virtual plane extending in the front-rear direction of the vehicle along the case-side connecting portion, and extending in the vertical direction of the vehicle through the front boss portion. When the space surrounded by the third virtual plane and the fourth virtual plane extending in the vertical direction of the vehicle through the rear boss portion is used as the bracket arrangement space in which the first mount bracket is arranged. The tensioner connecting portion is arranged in the bracket arrangement space.

As described above, according to the present invention, it is possible to prevent the chain case from bending due to the stress applied from the tension applying member, and it is possible to prevent the connecting force between the chain case and the engine body from being lowered.

FIG. 1 is a plan view of a front portion of a vehicle provided with an internal combustion engine for a vehicle according to an embodiment of the present invention. FIG. 2 is a right side view of an internal combustion engine for a vehicle according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a cross-sectional view taken along the line of the right mounting device in the IV-IV direction of FIG. FIG. 5 is a view of a right-mounting device for a vehicle internal combustion engine according to an embodiment of the present invention as viewed from diagonally right forward. FIG. 6 is a top view of a right mount device for a vehicle internal combustion engine according to an embodiment of the present invention. FIG. 7 is a top view of a right mount device for an internal combustion engine for a vehicle according to an embodiment of the present invention, showing a state in which the second mount bracket is removed. FIG. 8 is a top view of the right mount device of the internal combustion engine for a vehicle according to an embodiment of the present invention, showing a state in which the first mount bracket and the second mount bracket are removed. FIG. 9 is a right side view of an internal combustion engine for a vehicle according to an embodiment of the present invention, showing a state in which the first mount bracket is removed. FIG. 10 is a view of the internal combustion engine for a vehicle according to an embodiment of the present invention as viewed from diagonally right rearward, and shows a state in which the first mount bracket is removed. FIG. 11 is a right side view of an internal combustion engine for a vehicle according to an embodiment of the present invention, and is a view showing a state in which a first mount bracket is attached. FIG. 12 is a view of the first mount bracket of the right mounting device of the vehicle internal combustion engine according to the embodiment of the present invention as viewed from diagonally left front. FIG. 13 is a left side view of the first mounting bracket of the right mounting device for a vehicle internal combustion engine according to an embodiment of the present invention. FIG. 14 is a rear view of the first mounting bracket of the right mounting device for a vehicle internal combustion engine according to an embodiment of the present invention. FIG. 15 is a right side view of an internal combustion engine for a vehicle provided with a right mount device having another shape according to an embodiment of the present invention.

The vehicle internal combustion engine according to an embodiment of the present invention has an engine body having a crankshaft, a case member connected to an end portion of the engine body, and a mount side connecting portion, and is provided on the vehicle body side. An anti-vibration mount member, a bulge that swells from the case member toward the anti-vibration mount member and has a case-side connecting portion at the top, and a bulge that is provided below the bulge and transmits power from the crankshaft to the auxiliary machine. The drive belt is provided with a tension applying member provided below the bulging portion to apply tension to the drive belt, and a mount bracket for connecting the case side connecting portion and the mount side connecting portion. A tensioner pulley that comes into contact with the drive belt and a tensioner connecting portion provided at one end are connected to the case member, and a tensioner pulley is provided at the other end side to press the tensioner pulley against the drive belt. An internal combustion engine for a vehicle provided, the case member has a front boss portion located below the bulging portion and a rear boss portion located below the bulging portion in the front-rear direction of the vehicle with respect to the front boss portion. A rear boss portion located at is formed, and the mount bracket has an intermediate connecting portion, and the first mounting bracket connected to the case side connecting portion, and the intermediate connecting portion and the mounting side connecting portion are connected to each other. It is divided into a second mount bracket to be connected, and the first mount bracket has an upper wall portion whose base end side is connected to the case side connecting portion and a lower end portion in a direction extending downward from the upper wall portion and extending. The engine is provided with a front boss portion and a vertical wall portion connected to the rear boss portion, and a first virtual plane extending in the front-rear direction of the vehicle across the front boss portion and the rear boss portion and a case-side connection. A second virtual plane extending in the front-rear direction of the vehicle along the portion, a third virtual plane extending in the vertical direction of the vehicle through the front boss portion, and a second virtual plane extending in the vertical direction of the vehicle through the rear boss portion. When the space surrounded by the virtual plane of 4 is used as the bracket arrangement space in which the first mount bracket is arranged, the tensioner connecting portion is arranged in the bracket arrangement space.
As a result, it is possible to prevent the chain case from bending due to the stress applied from the tension applying member, and it is possible to prevent the connecting force between the chain case and the engine body from being lowered.

Hereinafter, an internal combustion engine for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.
1 to 15 are views showing an internal combustion engine for a vehicle according to an embodiment of the present invention. In FIGS. 1 to 15, the width direction of the vehicle is the left-right direction and the height direction of the vehicle is the vertical direction when the traveling direction of the vehicle is the front and the backward direction is the rear.

First, the configuration will be described.
In FIG. 1, the vehicle 1 includes a left side member 2L, a right side member 2R, and a cross member 3.

The left side member 2L and the right side member 2R extend in the front-rear direction apart from each other in the width direction of the vehicle 1 (hereinafter referred to as the vehicle width direction). The cross member 3 extends inward in the vehicle width direction from the left side member 2L and the right side member 2R, and connects the left side member 2L and the right side member 2R.

An engine room 4 surrounded by a left side member 2L, a right side member 2R, and a cross member 3 is provided in the front portion of the vehicle 1, and a power train 5 is arranged in the engine room 4.

The power train 5 is composed of an engine 6 as an internal combustion engine and a transmission 7, and the engine 6 and the transmission 7 are vehicles inside the vehicle width direction with respect to the left side member 2L and the right side member 2R. They are arranged side by side in the width direction. The engine 6 converts thermal energy into mechanical energy, and the transmission 7 shifts the rotation speed of the engine 6 and outputs it.

A left mount device 8 is provided on the left side member 2L, and the left mount device 8 elastically supports the power train 5 on the left side member 2L. The right side member 2R is provided with a right mount device 9, and the right mount device 9 elastically supports the power train 5 on the right side member 2R.

The cross member 3 is provided with a rear mount device 10, and the rear mount device 10 elastically supports the power train 5 on the cross member 3. The right mount device 9 of this embodiment constitutes the mount device of the present invention.

In FIG. 2, the engine 6 includes a cylinder block 11, a cylinder head 12 (see FIG. 3), a cylinder head cover 13, and an oil pan 14. The cylinder block 11 and the cylinder head 12 of this embodiment constitute the engine body of the present invention.

A chain case 21 is attached to the right side surface of the cylinder block 11 and the cylinder head 12 in the vehicle width direction (see FIG. 3), and the chain case 21 is shown on the right side surface of the cylinder block 11 and the cylinder head 12. Does not cover the timing chain. The chain case 21 of this embodiment constitutes the case member of the present invention.

The cylinder block 11 is provided with a plurality of cylinders (not shown). A piston (not shown) is housed in the cylinder, and the piston reciprocates in the vertical direction with respect to the cylinder. The piston is connected to the crankshaft 15 via a connecting rod (not shown), and the reciprocating motion of the piston is converted into the rotational motion of the crankshaft 15 via the connecting rod.

The cylinder head 12 is provided with a plurality of intake ports (not shown), a plurality of intake valves for opening and closing the intake ports, a plurality of exhaust ports, a plurality of exhaust valves for opening and closing the exhaust ports, and the like. The intake port introduces air into the cylinder, and the exhaust port exhausts the exhaust gas burned in the cylinder from the cylinder.

In FIG. 3, a valve chamber 16 is formed between the cylinder head 12 and the cylinder head cover 13, and an exhaust camshaft 17 and an intake camshaft (not shown) are housed in the valve chamber 16.

An exhaust cam 17A is provided on the exhaust cam shaft 17, and the exhaust cam 17A opens and closes an exhaust port by driving an exhaust valve as the exhaust cam shaft 17 rotates. The details of the intake camshaft will be omitted.

A hydraulic actuator 18 with a variable valve mechanism is provided at the right end of the exhaust camshaft 17. The hydraulic actuator 18 includes an advance chamber and a retard chamber (not shown) into which oil is introduced. The hydraulic actuator 18 controls the rotation phase of the exhaust camshaft 17 to the advance side when oil is introduced into the advance chamber, and changes the rotation phase of the exhaust camshaft 17 when oil is introduced into the retard chamber. Control to the retard side.

The timing chain covered by the chain case 21 connects the crankshaft 15, the exhaust camshaft 17, and the intake camshaft, and the timing chain transmits the power of the crankshaft 15 to the exhaust camshaft 17 and the intake camshaft. ..
Oil for lubricating the crankshaft 15, the piston, and the like is stored in the oil pan 14.

In FIG. 2, a water pump pulley 22, a crank pulley 23, a generator pulley 24, and an idler pulley 25 are rotatably provided on the right side of the engine 6.
The water pump pulley 22 is fixed to an input shaft 22A of a water pump (not shown) mounted on the cylinder block 11, and the water pump pulley 22 rotates together with the input shaft 22A to transmit power to the water pump. The crank pulley 23 is fixed to the right end portion of the crankshaft 15, and rotates clockwise together with the crankshaft 15.

The generator pulley 24 is fixed to the input shaft 26A of the generator 26 mounted on the cylinder block 11 and rotates together with the input shaft 26A to transmit power to the generator 26. The generator 26 generates electricity by electromagnetic induction action by rotating a rotor (not shown) provided on the input shaft 26A, and charges a battery (not shown). The idler pulley 25 is rotatably supported by the cylinder block 11. The water pump and generator 26 of this embodiment constitute an auxiliary machine of the present invention.

An endless drive belt 27 is wound around the water pump pulley 22, the crank pulley 23, the generator pulley 24, and the idler pulley 25. The drive belt 27 rotationally drives the water pump and the generator 26 by transmitting the power of the crankshaft 15 from the crank pulley 23 to the water pump pulley 22 and the generator pulley 24.

The idler pulley 25 is provided between the crank pulley 23 and the generator pulley 24 so as to apply tension to a portion of the drive belt 27 traveling from the crank pulley 23 to the generator pulley 24.

A belt tensioner 31 is arranged in the chain case 21, and the belt tensioner 31 is arranged below the bulging portion 51 described later. The belt tensioner 31 is arranged above the crank pulley 23 and in front of the water pump pulley 22 when viewed from the vehicle width direction.

The belt tensioner 31 includes an arm 32, a tensioner pulley 33, and an auto tensioner 34. One end of the arm 32 is swingably supported by the cylinder block 11. The tensioner pulley 33 is rotatably supported by the other end of the arm 32 and is in contact with the drive belt 27.

The auto tensioner 34 has a tubular damper 34A that can be expanded and contracted in the axial direction. A tensioner connecting portion 34a is provided at the upper end (one end) of the damper 34A, and the lower end (the other end) of the damper 34A is connected to the arm 32.

A spring (not shown) is provided on the inner peripheral portion of the damper 34A, and the damper 34A is urged by the spring to extend to generate a pressing force in the axial direction. As a result, the auto tensioner 34 can apply tension to the drive belt 27 by pressing the tensioner pulley 33 against the drive belt 27 via the arm 32, and loosening due to a decrease in the tension of the drive belt 27 is suppressed.

As a result, slippage between the drive belt 27 and the pulleys 22, 23, and 24 is suppressed. The auto tensioner 34 is not limited to the spring type, and may be composed of a hydraulic type , a pneumatic type, or the like, and a spring for applying tension and a hydraulic pressure for damping are used in combination. It may be composed of things.

In FIGS. 2 and 10, a flat portion 21A extending in the vertical direction is formed in the chain case 21. In FIG. 4, a tensioner connecting boss portion 52 is formed on the flat portion 21A, and the tensioner connecting portion 34a is connected to the tensioner connecting boss portion 52 by a bolt 37A. The belt tensioner 31 of this embodiment constitutes the tension applying member of the present invention, and the auto tensioner 34 constitutes the tensioner member of the present invention.

In FIGS. 3 and 4, the right mount device 9 includes a vibration-proof mount member 41 and a mount bracket 45. The anti-vibration mount member 41 is provided on the right side member 2R side. The anti-vibration mount member 41 has an outer cylinder 42, a mount rubber 43, and a shaft member 44, and each of the outer cylinder 42 and the shaft member 44 has a central axis extending in the vertical direction.

The outer cylinder 42 is provided with a mounting piece 42A extending outward in the vehicle width direction and a mounting piece 42B extending outward in the vehicle front-rear direction from the outer cylinder 42. The mounting piece 42A is fixed to the vehicle body panel 36 by bolts 37B, and the mounting piece 42B is fixed to the right side member 2R by bolts 37C (see FIGS. 5 to 8). The right side member 2R and the vehicle body panel 36 of this embodiment constitute the vehicle body of the present invention.

The mount rubber 43 is housed in the outer cylinder 42, and the outer peripheral portion of the mount rubber 43 is fixed to the outer cylinder 42 by vulcanization adhesion or the like. The shaft member 44 is fixed to the inner peripheral portion of the mount rubber 43 by vulcanization adhesion or the like.

A mount bracket 45 is connected to the shaft member 44 by a bolt 37D, and the mount bracket 45 connects the vibration-proof mount member 41 and the chain case 21. The shaft member 44 of this embodiment constitutes the mount-side connecting portion of the present invention.

The chain case 21 is provided on the engine 6 so as to face the anti-vibration mount member 41 in the vehicle width direction. In FIGS. 9 and 10, a bulging portion 51 is provided on the upper side of the flat portion 21A of the chain case 21.

The bulging portion 51 bulges from the outer surface of the chain case 21 toward the anti-vibration mount member 41 in the vehicle width direction, and is provided at a distance from the anti-vibration mount member 41 in the front-rear direction (FIG. 8). reference).

A case-side connecting portion 51A extending in the front-rear direction is provided on the upper portion of the bulging portion 51, and three screw grooves 51a extending downward from the case-side connecting portion 51A are formed in the bulging portion 51 (FIG. 8. See FIG. 10).

The mount bracket 45 of this embodiment connects the shaft member 44 and the case-side connecting portion 51A of the bulging portion 51, and as shown in FIG. 1, the vibration-proof mounting member 41 has the power train 5 on the right side. It is elastically supported by the member 2R and the vehicle body panel 36.

In FIGS. 3 to 5, the mount bracket 45 is divided into a first mount bracket 46 and a second mount bracket 47.

In FIGS. 12 and 13, the first mount bracket 46 includes an upper wall portion 61 and a vertical wall portion 62. The upper wall portion 61 extends in the front-rear direction. The upper wall portion 61 has a bracket side connecting portion 61A formed on the base end side (rear side in the front-rear direction of the vehicle 1) with the central portion in the extending direction of the upper wall portion 61 as a boundary, and the tip side (front-rear direction of the vehicle 1). An intermediate connecting portion 61B extending from the bracket side connecting portion 61A to the side of the shaft member 44 in the vehicle width direction is formed on the front side) (see FIG. 7).

Two through holes 61a are formed in the bracket side connecting portion 61A, and the bracket side connecting portion 61A is connected to the case side connecting portion 51A of the bulging portion 51 by a bolt 37F (see FIGS. 5 and 7). ). In FIG. 7, a part of the bulging portion 51 is shown by a virtual line.

In FIG. 7, the intermediate connecting portion 61B of this embodiment is provided at a position above the upper wall portion 61 and adjacent to the case-side connecting portion 51A of the bulging portion 51 in the front-rear direction. Three through holes 61b are formed in the intermediate connecting portion 61B, and one end of the second mount bracket 47 is connected to the intermediate connecting portion 61B by bolts 37G and stud bolts 37H (FIGS. 5 and 6). reference).

The other end of the second mount bracket 47 is connected to the upper end of the shaft member 44 by a bolt 37D (see FIG. 3). Here, the fact that the intermediate connecting portion 61B is located above the upper wall portion 61 means that the intermediate connecting portion 61B which is a separate body from the upper wall portion 61 is attached to the upper part of the upper wall portion 61, and that the intermediate connecting portion 61B is attached. Is composed of the upper surface of the upper wall portion 61. The intermediate connecting portion 61B constitutes a portion on which one end of the second mount bracket 47 is placed.

In FIG. 12, the vertical wall portion 62 extends downward from the outer end portion 61c in the width direction of the vehicle of the upper wall portion 61 in the region corresponding to the bracket side connecting portion 61A and the intermediate connecting portion 61B extending in the front-rear direction. .. FIG. 13 shows a region (range) in the front-rear direction between the bracket side connecting portion 61A and the intermediate connecting portion 61B.

That is, the vertical wall portion 62 includes a bracket-side connecting portion 61A that faces the case-side connecting portion 51A in the vehicle width direction and extends in the front-rear direction, and an intermediate connecting portion 61B that extends continuously in the front-rear direction to the bracket-side connecting portion 61A. In the region of the upper wall portion 61 in the front-rear direction corresponding to the above, the upper wall portion 61 extends downward from the outer end portion 61c of the vehicle in the width direction.

In FIGS. 9 and 10, the flat portion 21A of the chain case 21 is formed with a front boss portion 53A, a rear boss portion 53B, and an upper boss portion 53C. The lower end and the front end of the vertical wall portion 62 in the extending direction are connected to the front boss portion 53A, the rear boss portion 53B, and the upper boss portion 53C by bolts 37I (see FIG. 11).

In FIGS. 12 and 13, a front boss portion 62A, a rear boss portion 62B, and an upper boss portion 62C are formed on the vertical wall portion 62, and the front boss portion 62A, the rear boss portion 62B, and the upper boss portion 62C are formed. , Protruding from the vertical wall portion 62 toward the chain case 21 (see FIG. 14).

In FIGS. 9 and 10, the rear boss portion 53B of the chain case 21 is formed below the bulging portion 51. The front boss portion 53A is formed below the bulging portion 51 on the front side of the rear boss portion 53B and in line with the rear boss portion 53B in the front-rear direction.

The front boss portion 53A is provided so as to be separated from the case side connecting portion 51A in the front-rear direction, and the rear boss portion 53B is formed directly below the case side connecting portion 51A.

In FIG. 11, the upper boss portion 53C is formed on the side opposite to the case side connecting portion 51A with respect to the intermediate connecting portion 61B and adjacent to the intermediate connecting portion 61B in the front-rear direction. In FIG. 9, the upper boss portion 53C faces the bulging portion 51 in the front-rear direction, and is formed obliquely upward on the front side with respect to the front boss portion 53A.

The front boss portion 53A is connected to the front boss portion 62A of the vertical wall portion 62 by the bolt 37I, and the rear boss portion 53B is connected to the rear boss portion 62B of the vertical wall portion 62 by the bolt 37I. The upper boss portion 53C is connected to the upper boss portion 62C of the vertical wall portion 62 by a bolt 37I.

As a result, the first mount bracket 46 is firmly connected to the chain case 21 by the front boss portion 62A, the rear boss portion 62B, the upper boss portion 62C, and the bracket side connecting portion 61A.

In FIG. 9, when the chain case 21 is viewed from the outside in the vehicle width direction, the width of the chain case 21 above the joint portion 19 (see FIG. 3) between the cylinder block 11 and the cylinder head 12 is the joint portion. It is formed wider than the width below 19.

In the flat portion 21A, the front boss portion 53A and the rear boss portion 53B are formed above the joint portion 19. As a result, the first mount bracket 46 is arranged on the upper side of the joint portion 19.

In FIGS. 12 and 13, an outer peripheral rib 62D is formed on the outer peripheral portion of the vertical wall portion 62, and the outer peripheral rib 62D projects from the vertical wall portion 62 toward the chain case 21 (see FIGS. 7 and 14). , The front end and the rear end of the upper wall portion 61 are connected.

In FIGS. 12 and 13, the front boss portion 62A, the rear boss portion 62B, and the upper boss portion 62C are formed on the outer peripheral rib 62D, and the front boss portion 62A, the rear boss portion 62B, and the upper boss portion 62C are formed. , Is connected to the upper wall portion 61 by the outer peripheral rib 62D.

A partition wall 62E is formed in the vertical wall portion 62, and the partition wall 62E extends in the vertical direction inward of the outer peripheral rib 62D, and the upper wall portion 61 and the lower end portion of the vertical wall portion 62 (lower outer peripheral rib). 62D) is connected.

The partition wall 62E extends downward from the central portion in the extending direction (front-rear direction) of the upper wall portion 61, and the upper wall portion 61 is formed with a bracket side connecting portion 61A on the base end side with the partition wall 62E as a boundary. An intermediate connecting portion 61B is formed on the tip end side.

The first mount bracket 46 includes a rib forming region 71 provided on one side (front side) with respect to the partition wall 62E and a rib non-forming region 72 provided on the other side (rear side) with respect to the partition wall 62E. Has.

The rib forming region 71 is a region corresponding to the vertical wall portion 62 extending downward from the intermediate connecting portion 61B with the partition wall 62E as a boundary, and the rib non-forming region 72 is a bracket side connecting portion with the partition wall 62E as a boundary. This is a region corresponding to the vertical wall portion 62 extending downward from 61A.

In the rib forming region 71, the vertical wall portion 62 is formed with vertical ribs 62F, 62G and horizontal ribs 62H, 62I, 62J protruding from the vertical wall portion 62 toward the chain case 21. In the rib non-forming region 72, the vertical wall portion 62 is flat, and no rib is formed on the vertical wall portion 62.

The vertical ribs 62F and 62G extend in the vertical direction, and the upper ends of the vertical ribs 62F and 62G are connected to the intermediate connecting portion 61B. The vertical rib 62F extends from the lower part of the intermediate connecting portion 61B to the front boss portion 62A, and the vertical rib 62F connects the front boss portion 62A and the intermediate connecting portion 61B.

The lateral ribs 62H, 62I, and 62J extend in the front-rear direction. The horizontal ribs 62I and 62J connect the partition wall 62E and the vertical rib 62G, and the horizontal rib 62H connects the upper boss portion 62C and the vertical rib 62F. The vertical ribs 62F, 62G and the horizontal ribs 62H, 62I, 62J of this embodiment constitute the ribs of the present invention.

In FIG. 9, a first virtual plane 91 extending in the front-rear direction across the front boss portion 53A and the rear boss portion 53B, and a second virtual plane 92 extending in the front-rear direction along the case-side connecting portion 51A. The first mount bracket 46 forms a space surrounded by a third virtual plane 93 extending in the vertical direction through the front boss portion 53A and a fourth virtual plane 94 extending in the vertical direction through the rear boss portion 53B. When the bracket arrangement space 96 is arranged, the tensioner connecting portion 34a of the auto tensioner 34 is arranged in the bracket arrangement space 96.

The first virtual plane 91 is a virtual plane 91a connecting the upper end of the front boss portion 53A and the upper end of the rear boss portion 53B, and a virtual plane connecting the lower end of the front boss portion 53A and the lower end of the rear boss portion 53B. It suffices to pass between the plane 91b.
The third virtual plane 93 may pass between the front end and the rear end of the front boss portion 53A, and the fourth virtual plane 94 passes between the front end and the rear end of the rear boss portion 53B. I just need to be there.

The tensioner connecting portion 34a of this embodiment may be arranged within the range of the bracket arrangement space 96, but in this embodiment, the tensioner connecting portion 34a is the front boss portion 53A of the bracket arrangement space 96. It is arranged in the space between bosses 97 between the rear boss portion 53B and the boss portion 53B. In other words, the tensioner connecting portion 34a is arranged in the inter-boss space 97 between the virtual plane 91a and the virtual plane 91b.

That is, the tensioner connecting portion 34a of this embodiment is between the front boss portion 53A and the rear boss portion 53B in the bracket arrangement space 96 surrounded by the front boss portion 53A, the rear boss portion 53B, and the bulging portion 51. It is arranged in the space 97 between the bosses.

The tensioner connecting portion 34a is arranged biased toward the front boss portion 53A with respect to the fifth virtual plane 95 that vertically crosses the central portion 91c in the extending direction of the first virtual plane 91. The central portion 91c in the extending direction of the first virtual plane 91 is the central portion in the front-rear direction between the front boss portion 53A and the rear boss portion 53B. In FIG. 10, the tensioner connecting boss portion 52 is arranged adjacent to the front boss portion 53A in the front-rear direction, and the tensioner connecting boss portion 52 is connected to the front boss portion 53A.

As a result, the rear boss portion 53B and the case side connecting portion 51A of this embodiment are arranged on the rear side with respect to the fifth virtual plane 95, and the front boss portion 53A and the tensioner connecting portion 34a are arranged on the fifth virtual plane 95. It will be arranged on the front side with respect to the plane 95.

In FIGS. 9 and 10, a cylinder portion 63 is arranged above the flat portion 21A of the chain case 21 and below the bulging portion 51, and a hydraulic control valve 64 is inserted into the cylinder portion 63. ing. In FIG. 3, the cylinder portion 63 is formed between the chain case 21 and the vertical wall portion 62 so as to face the vertical wall portion 62 in the vehicle width direction.

In FIGS. 9 and 10, the cylinder portion 63 is formed so as to cross between the bulging portion 51, the tensioner connecting boss portion 52, the front boss portion 53A, and the rear boss portion 53B in the vertical direction.

Specifically, the cylinder portion 63 and the hydraulic control valve 64 of the present embodiment face the vertical wall portion 62 and are adjacent to the case-side connecting portion 51A in the vertical direction, and the upper wall portion 61 and the vertical wall. It is arranged in the bracket arrangement space 96 surrounded by the portion 62, the front boss portion 53A, and the rear boss portion 53B.

The hydraulic control valve 64 includes a plunger (not shown) inserted into the cylinder unit 63, and a control unit 64A such as an electromagnetic solenoid that protrudes outward from the cylinder unit 63 to drive the plunger.

Oil is introduced into the cylinder portion 63 from an oil pump (not shown). The cylinder portion 63 communicates with the advance chamber and the retard chamber of the hydraulic actuator 18 through an oil passage (not shown) formed in the chain case 21, respectively.

The plunger is driven by the control unit 64A to switch the oil flow direction so as to supply the oil supplied from the oil pump to the cylinder unit 63 to either the advance chamber or the retard chamber. The hydraulic actuator 18 of this embodiment constitutes the hydraulic device of the present invention.

The rear boss portion 53B is provided at one end in the axial direction of the cylinder portion 63, and the cylinder portion 63 has a first virtual portion in which the other end in the axial direction of the cylinder portion 63 is arranged below the cylinder portion 63. It is inclined with respect to the horizontal plane 98 so as to be away from the plane 91. The first virtual plane 91 of this embodiment constitutes the virtual plane of the present invention.

The engine 6 of the present embodiment is arranged in the engine room 4 so that the cylinder shaft (not shown) is tilted forward with respect to the vertical direction. The case-side connecting portion 51A connected to the right side member 2R via the right mounting device 9 is formed in a horizontal plane so that the right mounting device 9 does not tilt.

Therefore, the second virtual plane 92 passing through the case-side connecting portion 51A is formed in a horizontal plane. In FIG. 9, the horizontal plane 98 different from the second virtual plane 92 is formed in order to make it clear that the cylinder portion 63 is inclined with respect to the horizontal plane 98.

The front boss portion 53A and the rear boss portion 53B of the present embodiment constitute the case side boss portion of the present invention, and the front boss portion 53A constitutes the first case side boss portion of the present invention. The upper boss portion 53C constitutes the second case-side boss portion of the present invention, and the rear-side boss portion 53B constitutes the third case-side boss portion of the present invention.

The front boss portion 62A constitutes the first boss portion of the present invention, and the upper boss portion 62C constitutes the second boss portion of the present invention. The front boss portion 62A, the rear boss portion 62B, and the upper boss portion 62C form the bracket side boss portion of the present invention.

In FIG. 11, the rib forming region 71 faces the control portion 64A of the hydraulic control valve 64 in the vehicle width direction, and the rib non-forming region 72 faces the cylinder portion 63 in the vehicle width direction.

In FIGS. 9 and 10, a plurality of reinforcing ribs 65, 66, 67 are formed on the upper portion of the chain case 21, and the reinforcing ribs 65, 66, 67 cross the cylinder portion 63 from the lower portion of the bulging portion 51. Extends downward.

The lower ends 65a and 66a of the reinforcing ribs 65 and 66 extend from the lower portion of the bulging portion 51 through the bracket arrangement space 96 to the lower portion of the tensioner connecting boss portion 52. The reinforcing ribs 65 and 66 are connected to the outer peripheral surface of the cylinder portion 63, and project from the flat portion 21A and the cylinder portion 63 toward the vertical wall portion 62 outward in the vehicle width direction.

The reinforcing rib 67 projects from the flat portion 21A and the cylinder portion 63 toward the vertical wall portion 62 outward in the vehicle width direction, and the bulging portion 51, the cylinder portion 63, and the tensioner connecting boss portion 52 are the reinforcing ribs. It is connected by 67.

The reinforcing ribs 65 and 66 of the present embodiment constitute the first reinforcing rib of the present invention, and the reinforcing rib 67 constitutes the second reinforcing rib of the present invention.

According to the engine 6 of the present embodiment, the chain case 21 has a front boss portion 53A located below the bulging portion 51 and a rear boss portion 53A located below the bulging portion 51 and rearward with respect to the front boss portion 53A. A rear boss portion 53B located at is formed.

The mount bracket 46 has an intermediate connecting portion 61B, a first mounting bracket 46 connected to the case-side connecting portion 51A of the bulging portion 51, and a second mounting bracket 46 connecting the intermediate connecting portion 61B and the shaft member 44. It is divided into a mount bracket 47.

In the first mount bracket 46, the base end side is connected to the case side connecting portion 51A, and the upper wall portion 61 extends downward from the upper wall portion 61, and the lower end portion in the extending direction is the front side boss portion 53A and the rear side boss portion. It is provided with a vertical wall portion 62 connected to 53B.

A first virtual plane 91 connecting the front boss portion 53A and the rear boss portion 53B, a second virtual plane 92 extending in the front-rear direction through the case-side connecting portion 51A, and up and down through the front boss portion 53A. The space surrounded by the third virtual plane 93 extending in the direction and the fourth virtual plane 94 extending in the vertical direction through the rear boss portion 53B is the bracket arrangement space 96 in which the first mount bracket 46 is arranged. In this case, the tensioner connecting portion 34a of the auto tensioner 34 is arranged in the bracket arrangement space 96.

As a result, even if the portion of the chain case 21 to which the tensioner connecting portion 34a is connected is a flat portion 21A having a lower rigidity than the uneven portion, the rigidity of the flat portion 21A is increased to the bulging portion 51, the front boss portion 53A, and the front boss portion 53A. It can be raised by the rear boss portion 53B.

In addition to this, the rigidity of the flat portion 21A can be further increased by connecting the first bracket 46 to the case-side connecting portion 51A, the front-side boss portion 53A, and the rear-side boss portion 53B of the bulging portion 51.

Therefore, it is possible to prevent the flat portion 21A from bending when a stress (reaction force from the drive belt 27) applied to the flat portion 21A is applied from the tensioner connecting portion 34a of the auto tensioner 34. As a result, it is possible to prevent the connecting force between the cylinder block 11 and the cylinder head 12 and the chain case 21 from being lowered, and the airtightness of the engine 6 can be ensured.

Although the tensioner connecting portion 34a of this embodiment is connected to the flat portion 21A of the chain case 21, it may be a concave portion, a convex portion or an uneven portion instead of the flat portion 21A. Even in such a case, it is possible to prevent the concave portion, the convex portion or the uneven portion from bending.

Further, according to the engine 6 of the present embodiment, the tensioner connecting portion 34a is arranged in the space between bosses 97 between the front side boss portion 53A and the rear side boss portion 53B in the bracket arrangement space 96. The tensioner connecting portion 34a can be connected to the portion of the flat portion 21A having high rigidity between the front boss portion 53A and the rear boss portion 53B.

Therefore, when stress is applied from the tensioner connecting portion 34a of the auto tensioner 34 to the flat portion 21A, it is possible to more effectively prevent the flat portion 21A from bending, and the cylinder block 11, the cylinder head 12, and the chain case 21 It is possible to more effectively prevent a decrease in the connecting force of the cylinder.

Further, according to the engine 6 of the present embodiment, the tensioner connecting portion 34a vertically crosses the central portion 91c in the extending direction of the first virtual plane 91 between the front side boss portion 53A and the rear side boss portion 53B. It is biased toward the front boss portion 53A with respect to the fifth virtual plane 95.

As a result, the mount load applied to the flat portion 21A from the right mounting device 9 via the bulging portion 51 on the rear side with respect to the fifth virtual plane 95, that is, the bulging portion from the right mounting device 9 when the engine 6 vibrates. The reaction force applied to the 51 and the stress applied to the flat portion 21A from the tensioner connecting portion 34a of the auto tensioner 34 on the front side with respect to the fifth virtual plane 95 are dispersed back and forth with the fifth virtual plane 95 as a boundary. It can be transmitted to the flat portion 21A.

Therefore, it is possible to more effectively prevent the flat portion 21A from bending, and it is possible to more effectively prevent the connecting force between the cylinder block 11 and the cylinder head 12 and the chain case 21 from being lowered.

The tensioner connecting portion 34a of the present embodiment is arranged biased toward the front boss portion 53A with respect to the fifth virtual plane 95 that vertically crosses the central portion 91c in the extending direction of the first virtual plane 91. However, it is not limited to this.

For example, when the case-side connecting portion 51A is arranged on the front side with respect to the fifth virtual plane 95, the tensioner connecting portion 34a is biased toward the rear boss portion 53B side with respect to the fifth virtual plane 95. It may be arranged.

Further, according to the engine 6 of the present embodiment, the chain case 21 is formed with a tensioner connecting boss portion 52 connected to the tensioner connecting portion 34a, and the tensioner connecting boss portion 52 is connected to the front side boss portion 53A. It is connected.

As a result, the rigidity of the flat portion 21A to which the tensioner connecting portion 34a is connected by the tensioner connecting boss portion 52 and the front boss portion 53A can be increased. As a result, the mount load applied from the right mounting device 9 to the flat portion 21A via the bulging portion 51 and the stress applied from the tensioner connecting portion 34a of the auto tensioner 34 to the flat portion 21A are bounded by the fifth virtual plane 95. It can be more effectively dispersed in the front-rear direction and transmitted to the flat portion 21A.

Therefore, it is possible to more effectively prevent the flat portion 21A from bending, and it is possible to more effectively prevent the connecting force between the cylinder block 11 and the cylinder head 12 and the chain case 21 from being lowered.

The tensioner connecting boss portion 52 of this embodiment is connected to the front boss portion 53A, but the present invention is not limited to this. When the case-side connecting portion 51A is arranged on the front side with respect to the fifth virtual plane 95 and the tensioner connecting portion 34a is arranged on the rear side boss portion 53B side with respect to the fifth virtual plane 95. , The tensioner connecting boss portion 52 may be connected to the rear boss portion 53B.

Further, according to the engine 6 of the present embodiment, the chain case 21 is formed with a cylinder portion 63 in which a hydraulic control valve 64 provided in the engine 6 and supplying oil to the hydraulic actuator 18 is inserted, and the cylinder portion 63 is formed. Faces the vertical wall portion 62 in the vertical direction and crosses between the bulging portion 51 and the tensioner connecting boss portion 52.

As a result, the area of the flat surface of the flat portion 21A to which the tensioner connecting portion 34a is connected can be reduced by the arrangement space of the cylinder portion 63, and the rigidity of the flat portion 21A can be increased. Therefore, when stress is applied from the tensioner connecting portion 34a of the auto tensioner 34 to the flat portion 21A, it is possible to more effectively prevent the flat portion 21A from bending, and the cylinder block 11, the cylinder head 12, and the chain case 21 It is possible to more effectively prevent a decrease in the connecting force of the cylinder.

Further, according to the engine 6 of the present embodiment, the chain case 21 is formed with reinforcing ribs 65 and 66 extending downward from the lower portion of the bulging portion 51 across the cylinder portion 63, and the reinforcing ribs 65 and 66 are formed. The lower end portions 65a and 66a extend below the tensioner connecting boss portion 52 through the bracket arrangement space 96.

As a result, the rigidity of the flat portion 21A can be further increased by the reinforcing ribs 65 and 66, and the mounting load applied from the right mounting device 9 to the flat portion 21A via the bulging portion 51 is applied by the reinforcing ribs 65 and 66 to the chain case. It can escape below 21.
Further, the stress applied to the flat portion 21A from the tensioner connecting portion 34a of the auto tensioner 34 can be transmitted from the reinforcing ribs 65 and 66 to the bulging portion 51 having high rigidity.

Therefore, the mounting load applied from the right mounting device 9 to the flat portion 21A via the bulging portion 51 and the stress applied from the tensioner connecting portion 34a of the auto tensioner 34 to the flat portion 21A are defined by the fifth virtual plane 95. It is possible to disperse more effectively in the front-rear direction and prevent the dispersed load from being strongly transmitted to the flat portion 21A. Therefore, it is possible to more effectively prevent the flat portion 21A from bending.

Further, according to the engine 6 of the present embodiment, the chain case 21 is formed with a reinforcing rib 67 extending downward from the lower portion of the bulging portion 51 across the cylinder portion 63, and the bulging portion 51 is formed by the reinforcing rib 67. The cylinder portion 63 and the tensioner connecting boss portion 52 are connected to each other.

As a result, the rigidity of the flat portion 21A can be further increased by the reinforcing rib 67, and the stress applied from the tensioner connecting portion 34a to the flat portion 21A can be transmitted to the highly rigid bulging portion 51 through the reinforcing rib 67.

Therefore, the mounting load applied from the right mounting device 9 to the flat portion 21A via the bulging portion 51 and the stress applied from the tensioner connecting portion 34a of the auto tensioner 34 to the flat portion 21A are defined by the fifth virtual plane 95. It is possible to disperse more effectively in the front-rear direction and more effectively prevent the dispersed load from being strongly transmitted to the flat portion 21A. Therefore, it is possible to more effectively prevent the flat portion 21A from bending.

Further, according to the engine 6 of the present embodiment, since the cylinder portion 63 and the rear boss portion 53B are connected, the rigidity of the flat portion 21A can be further increased by the cylinder portion 63 and the rear boss portion 53B. ..

Therefore, the mount load applied to the flat portion 21A from the right mounting device 9 via the bulging portion 51 and the stress applied to the flat portion 21A from the tensioner connecting portion 34a of the auto tensioner 34 are strongly transmitted to the flat portion 21A. Can be suppressed more effectively. Therefore, it is possible to more effectively prevent the flat portion 21A from bending.

When the case side connecting portion 51A is arranged on the front side with respect to the fifth virtual plane 95 and the control unit 64A of the hydraulic control valve 64 is arranged on the rear side boss portion 53B side, the case side connecting portion 51A and the front side boss portion 53A The cylinder portion 63 may be connected.

Further, the right mounting device 9 of the present embodiment is arranged in the space between bosses 97 between the front boss portion 53A and the rear boss portion 53B in the bracket arrangement space 96, but the range of the bracket arrangement space 96. If so, it may be placed anywhere.

For example, as shown by a virtual line in FIG. 15, a tensioner connecting boss portion 101 is formed on the chain case 21 facing the first mount bracket 46, and the tensioner connecting portion 34a is connected to the tensioner inside the first mount bracket 46. It may be connected to the boss portion 101.

Further, in the present embodiment, the belt tensioner 31 has an arm 32 and an auto tensioner 34, the auto tensioner 34 has a tubular damper 34A that can be expanded and contracted in the axial direction, and the lower end portion of the damper 34A is an arm. It is connected to the tensioner pulley 33 via 32, but is not limited to this. For example, the tensioner pulley 33 may be rotatably connected to the lower end of the damper 34A.

Although the embodiments of the present invention have been disclosed, it is clear that some skilled in the art can make changes without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

1 ... Vehicle, 2R ... Right side member (body), 5 ... Powertrain, 6 ... Engine (internal combustion engine), 9 ... Right mounting device (mounting device), 18 ... Hydraulic actuator (hydraulic equipment), 11 ... cylinder block (engine body), 12 ... cylinder head (engine body), 15 ... crank shaft, 21 ... chain case (case member), 26 .. Generator, 27 ... drive belt, 31 ... belt tensioner (tensioning member), 32 ... arm, 33 ... tensioner pulley, 34 ... auto tensioner (tensioner member), 34a ... Tensioner connection part, 36 ... body panel (body), 41 ... anti-vibration mount member, 44 ... shaft member (mount side connection part), 45 ... mount bracket, 46 ... first Mount bracket, 47 ... 2nd mount bracket, 51 ... bulging part, 51A ... case side connecting part, 52, 101 ... tensioner connecting boss part, 53A ... front side boss part, 53B ... Rear boss part, 61 ... Upper wall part, 61B ... Intermediate connection part, 63 ... Cylinder part, 64 ... Hydraulic control valve, 64A ... Control part, 65, 66 ... Reinforcing ribs, 65, 66 ... Reinforcing ribs (first reinforcing ribs), 67 ... Reinforcing ribs (second reinforcing ribs), 91 ... First virtual plane, 91a ... Central part (center part in the extending direction of the first virtual plane), 92 ... second virtual plane, 93 ... third virtual plane, 94 ... fourth virtual plane, 95 ... Fifth virtual plane

Claims (8)

The engine body with the crankshaft and
A case member connected to the end of the engine body and
A vibration-proof mount member that has a mount-side connection and is provided on the vehicle body side,
A bulging portion that bulges from the case member toward the vibration-proof mount member and has a case-side connecting portion at the upper portion.
A drive belt provided below the bulge and transmitting power from the crankshaft to the auxiliary machine.
A tension applying member provided below the bulging portion and applying tension to the drive belt, and
A mount bracket for connecting the case-side connecting portion and the mount-side connecting portion is provided.
The tensioner pulley that contacts the drive belt and the tensioner connecting portion provided at one end of the tension applying member are connected to the case member, and the tensioner pulley is provided at the other end side of the tensioning member. An internal combustion engine for a vehicle provided with a tensioner member for pressing the drive belt.
The case member has a front boss portion located below the bulging portion and a rear boss located below the bulging portion and located behind the front boss portion in the front-rear direction of the vehicle. The part is formed,
The mount bracket has an intermediate connecting portion and is divided into a first mounting bracket that is connected to the case-side connecting portion and a second mount bracket that connects the intermediate connecting portion and the mount-side connecting portion. Has been
In the first mount bracket, an upper wall portion whose base end side is connected to the case side connecting portion and a lower end portion extending downward from the upper wall portion and extending in the extending direction are the front side boss portion and the rear side boss portion. It has a vertical wall that is connected to
A first virtual plane extending in the front-rear direction of the vehicle across the front boss portion and the rear boss portion, a second virtual plane extending in the front-rear direction of the vehicle along the case-side connecting portion, and the front side. The first mount bracket forms a space surrounded by a third virtual plane extending in the vertical direction of the vehicle through the boss portion and a fourth virtual plane extending in the vertical direction of the vehicle through the rear boss portion. An internal combustion engine for a vehicle, wherein the tensioner connecting portion is arranged in the bracket arrangement space when the bracket arrangement space is arranged. The internal combustion engine for a vehicle according to claim 1, wherein the tensioner connecting portion is arranged in a space between bosses between the front boss portion and the rear boss portion in the bracket arrangement space. .. One of the front boss portion and the rear boss portion is provided so as to be separated from the case side connecting portion in the front-rear direction.
The tensioner connecting portion has the front boss portion with respect to a fifth virtual plane that vertically crosses the central portion in the extending direction of the first virtual plane between the front boss portion and the rear boss portion. The vehicle internal combustion engine according to claim 1 or 2, wherein the engine is arranged on either the side or the rear boss portion side. A tensioner connecting boss portion to be connected to the tensioner connecting portion is formed on the case member.
The tensioner connecting boss for a vehicle internal combustion engine according to any one of claims 1 to 3, characterized in that it is connected to the front boss portion or the rear boss portion. The case member is formed with a cylinder portion into which a hydraulic control valve for supplying oil to a hydraulic device provided in the internal combustion engine for a vehicle is inserted.
The cylinder portion is opposed to the vertical wall, an internal combustion engine for a vehicle according to claim 4, wherein the crossing between said bulging portion and the tensioner coupling boss. The case member is formed with reinforcing ribs extending downward from the lower part of the bulging portion across the cylinder portion.
The reinforcing rib for a vehicle internal combustion engine according to請Motomeko 5 you, characterized in that its lower end through said bracket arrangement space extends to below the tensioner coupling boss. When the reinforcing rib is used as the first reinforcing rib, the case member is formed with a second reinforcing rib extending downward from the lower part of the bulging portion across the cylinder portion.
The internal combustion engine for a vehicle according to claim 6, wherein the bulging portion, the cylinder portion, and the tensioner connecting boss portion are connected by the second reinforcing rib. The vehicle internal combustion engine according to any one of claims 5 to 7, wherein the cylinder portion and the front boss portion or the rear boss portion are connected to each other.

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