JP7400328B2 - Engine auxiliary equipment mounting structure - Google Patents

Description

The present invention relates to an engine accessory mounting structure.

BACKGROUND ART Conventionally, a structure described in Patent Document 1 is known as a structure for supporting an auxiliary machine on an engine. In the engine auxiliary equipment mounting structure described in Patent Document 1, the chain case of the engine has a curved part that curves along the chain tensioner, and by arranging the auxiliary equipment such as a generator in this curved part, , the auxiliary equipment is placed close to the engine. According to the engine auxiliary equipment mounting structure described in Patent Document 1, by arranging the auxiliary equipment close to the engine, it is possible to reduce the size of the arm that supports the auxiliary equipment on the engine.

Japanese Patent Application Publication No. 8-135465

By the way, the structure of the accessory support part can be simplified by integrating the accessory attachment part, which is an attachment part on the engine side such as an arm, with the cylinder block of the engine. On the other hand, the accessory support portion is required to have rigidity to prevent vibration of the accessory.

However, the engine auxiliary equipment mounting structure described in Patent Document 1 does not take into consideration reducing the vibration of the auxiliary equipment when the auxiliary equipment mounting part that supports the auxiliary equipment is integrated with the cylinder block. There was room for.

The present invention has been made in view of the above-mentioned circumstances, and provides an engine that can reduce the vibration of the auxiliary equipment even when the auxiliary equipment mounting part that supports the auxiliary equipment is integrated with the cylinder block. The purpose is to provide an auxiliary equipment mounting structure.

The present invention provides a cylinder block having a plurality of cylinders, a side wall of the cylinder block extending in the cylinder row direction, and a screw hole into which a head bolt for fastening the cylinder head is fastened, the side wall having a screw hole formed at a predetermined interval. a plurality of head bolt fastening bosses disposed; an auxiliary machine disposed adjacent to the side wall and to which power is transmitted from the crankshaft; a base end of the auxiliary machine connected to the side wall; An auxiliary equipment mounting structure for an engine having an upper auxiliary equipment mounting part to which an upper part of the engine is attached, and a lower auxiliary equipment mounting part to which a lower part of the auxiliary equipment is attached , wherein the upper auxiliary equipment mounting part is attached to the lower part of the auxiliary equipment. The base end portion of the upper auxiliary equipment mounting portion extends upwardly of the machine and is connected to the plurality of head bolt fastening bosses arranged in the cylinder row direction of the cylinder block .

According to the present invention described above, even when the accessory mounting portion that supports the accessory is integrated with the cylinder block, the vibration of the accessory can be reduced.

FIG. 1 is a perspective view of an engine having an engine accessory mounting structure according to an embodiment of the present invention. FIG. 2 is a right side view of an engine having an engine accessory mounting structure according to an embodiment of the present invention. FIG. 3 is a rear view of an engine having an engine accessory mounting structure according to an embodiment of the present invention. FIG. 4 is a rear view of an engine cylinder block having an engine accessory mounting structure according to an embodiment of the present invention. FIG. 5 is a plan view of an engine cylinder block having an engine accessory mounting structure according to an embodiment of the present invention.

In an engine accessory mounting structure according to an embodiment of the present invention, a head bolt for fastening a cylinder block to a cylinder block having a plurality of cylinders, a side wall of the cylinder block extending in the cylinder row direction, and a cylinder head is fastened. A screw hole is formed and a plurality of head bolt fastening bosses are arranged at predetermined intervals on the side wall, an auxiliary machine is arranged adjacent to the side wall and power is transmitted from the crankshaft, and its base end is attached to the side wall. An auxiliary equipment mounting structure for an engine, comprising: an auxiliary equipment mounting part connected to the front end of which an auxiliary equipment is mounted; The base end of the attachment portion is connected to a plurality of head bolt fastening bosses. As a result, the engine accessory mounting structure according to the embodiment of the present invention can reduce the vibration of the accessory even when the accessory mounting portion that supports the accessory is integrated with the cylinder block.

Embodiments of the engine auxiliary equipment mounting structure according to the present invention will be described below with reference to the drawings. 1 to 5 are diagrams showing an engine accessory mounting structure according to an embodiment of the present invention.

First, the configuration will be explained. Note that in FIGS. 1 to 5, the left and right directions represent the left and right directions of the vehicle as seen from the driver's seat.

In FIGS. 1, 2, and 3, the engine 1 includes an engine main body 1A and an auxiliary machine 1B. In this embodiment, the auxiliary machine 1B consists of an ISG (Integrated Starter Generator). The ISG is a rotating electrical machine that integrates an electric motor and a generator, and performs operations such as starting the engine 1, generating power using the power of the engine 1, and applying power to the engine 1. Note that the auxiliary machine 1B may be a generator.

The engine body 1A includes a cylinder block 2, a cylinder head 3 provided at the top of the cylinder block 2, a cylinder head cover 4 provided at the top of the cylinder head 3, and an oil pan 5 provided at the bottom of the cylinder block 2. It is equipped with

1 and 5, the cylinder block 2 is formed with a plurality (three) of cylinders 27 that accommodate pistons (not shown) in a vertically movable manner. The cylinder block 2 accommodates a crankshaft 6 that converts the vertical movement of the piston into rotational movement, and the crankshaft 6 extends in the left-right direction. The cylinders 27 are arranged in the left-right direction in which the crankshaft 6 extends.

In FIG. 2, the cylinder head 3 accommodates an intake-side camshaft 7 equipped with an intake cam (not shown) and an exhaust-side camshaft 8 equipped with an exhaust cam (not shown). The camshafts 7 and 8 extend parallel to each other along the arrangement direction (left-right direction) of the cylinders 27.

Variable valve timing devices 7A and 8A are provided at the right end portions of the camshafts 7 and 8, respectively. The variable valve timing devices 7A and 8A respectively adjust the opening/closing timing and lift amount of an intake valve and an exhaust valve (not shown).

Note that an intake port (not shown) is formed on the rear surface of the cylinder head 3. Further, an exhaust port (not shown) is formed on the front surface of the cylinder head 3. The intake port and the exhaust port are brought into communication with or out of communication with a combustion chamber (not shown) by an intake valve and an exhaust valve that are driven as the camshafts 7 and 8 rotate.

In FIG. 4, a breather chamber forming portion 31 is provided on the rear side surface of the cylinder block 2, and this breather chamber forming portion 31 projects rearward from the rear side surface of the cylinder block 2.

A breather chamber 32 is formed inside the breather chamber forming portion 31, and the oil mist in the blow-by gas is separated by passing through the breather chamber 32. The breather chamber 32 is closed by a breather chamber cover 33 fixed to the rear side surface of the cylinder block 2.

The breather chamber cover 33 is provided with a PCV (Positive Crankcase Ventilation) valve 33A. The PCV valve 33A adjusts the flow rate of blowby gas flowing from the breather chamber 32 to a blowby gas exhaust pipe (not shown).

The blow-by gas that has flowed into the breather chamber 32 is separated from oil in the breather chamber 32, and then is sucked out by the suction negative pressure of the engine body 1A through the PCV valve 33A and introduced into the intake passage.

In FIG. 5, a chain cover 21 is provided at the right end of the cylinder block 2 and cylinder head 3. As shown in FIG. The chain cover 21 forms a chain storage chamber 22 between the cylinder block 2 and the cylinder head 3.

The timing chain 11 is housed in the chain housing chamber 22 . Chain cover 21 is fastened to the ends of cylinder block 2 and cylinder head 3 by a plurality of fasteners including fastener 69 so as to cover timing chain 11 from the right side. In this embodiment, the fastener is a bolt.

In FIG. 1, a mount attachment part 23 is provided at the upper part of the chain cover 21. The mount attachment part 23 protrudes rightward from the surface of the chain cover 21, and the upper surface of the mount attachment part 23 is connected to a vehicle body (not shown). The engine 1 is supported by the vehicle body at a plurality of parts including a mount attachment part 23.

In FIG. 5, the rear side wall 2A of the cylinder block 2 extends in the cylinder row direction (left-right direction), which is the direction in which the cylinders 27 are arranged. A plurality of head bolt fastening bosses 43 are arranged at predetermined intervals on the side wall 2A of the cylinder block 2, and the head bolt fastening bosses 43 have screw holes into which head bolts 41 for fastening the cylinder head 3 are fastened. 42 is formed. The auxiliary machine 1B (see FIG. 1) is arranged at a position adjacent to the side wall 2A of the cylinder block 2.

In FIGS. 1, 2, and 3, an upper auxiliary equipment mounting portion 51 is provided at the upper right end portion of the side wall 2A of the cylinder block 2. As shown in FIG. A lower auxiliary equipment mounting portion 53 is provided at the lower right end portion of the side wall 2A of the cylinder block 2. The upper auxiliary equipment mounting portion 51 and the lower auxiliary equipment mounting portion 53 protrude outward (rearward) from the side wall 2A.

A base end portion of the upper auxiliary equipment mounting portion 51 is connected to the side wall 2A. An upper arm part 52 is fastened to the tip of the upper auxiliary equipment mounting part 51 in the protruding direction (rearward), and the upper arm part 52 is fixed to the upper part of the auxiliary equipment 1B. A lower arm part 54 is fastened to the lower auxiliary equipment mounting part 53, and the lower arm part 54 is fixed to the lower part of the auxiliary equipment 1B.

In this way, the upper part of the auxiliary machine 1B is attached to the tip of the upper auxiliary machine attachment part 51 via the upper arm part 52, and the lower part of the auxiliary machine attachment part 53 is attached to the upper part of the auxiliary machine 1B via the upper arm part 52. The lower part of the auxiliary machine 1B is attached via the section 54.

In FIG. 5, the upper auxiliary equipment mounting portion 51 has a predetermined length in the cylinder row direction. A base end portion of the upper auxiliary equipment mounting portion 51 is connected to a plurality of head bolt fastening bosses 43 . A flange portion 2B is formed on the rear side of the right end portion of the cylinder block 2, and a flange portion 2C is formed on the front side of the right end portion of the cylinder block 2. Here, the front side of the cylinder block 2 is a portion in front of the cylinder 27.

A flange portion 3B (see FIG. 1) is formed on the rear side of the right end portion of the cylinder head 3, and a flange portion (not shown) is formed on the front side of the right end portion of the cylinder head 3. A chain cover 21 is joined to the rear flange portion 3B and the front flange portion of the cylinder head 3.

The flange portions 3B, 2B protrude outward (to the right) from the side walls 3A, 2A extending in the cylinder row direction, respectively. Therefore, the flange portions 2B and 2C of the cylinder block 2 protrude from the right end of the side wall 2A of the cylinder block 2 in the direction of the cylinder row (left-right direction), respectively, in a direction intersecting the direction of the cylinder row (backward and forward). An end (right end) of the upper auxiliary equipment mounting portion 51 in the cylinder row direction is connected to the flange portion 2B.

The flange portions 3B, 2B extend linearly in the vertical direction as a whole, and constitute a vertical flange portion in the present invention. The flange portions 3B and 2B extend in the vertical direction of the cylinder head 3 and the cylinder block 2 when viewed as a whole. The upper auxiliary equipment mounting portion 51 has a tip portion (rear end portion) protruding outward (rearward) from the flange portion 2B.

Further, the intermediate portion of the upper auxiliary equipment mounting portion 51 in the front-rear direction is connected to the flange portion 2B by a fastener 69 (see FIG. 5). Here, the intermediate portion of the upper auxiliary equipment mounting portion 51 is a portion approximately intermediate between the distal end portion in the protruding direction and the base end portion connected to the side wall 2A.

1 and 4, the upper auxiliary equipment mounting portion 51 includes a plate-shaped main body portion 51A disposed near the upper end of the cylinder block 2, and a first rib 61. The first rib 61 extends downward from the end of the main body portion 51A in the cylinder row direction and is connected to the flange portion 2B. In other words, the first rib 61 is provided at the end of the main body 51A on the flange parts 3B, 2B side, and extends from the main body 51A to the lower part of the cylinder block 2. The first rib 61 constitutes a lower rib in the present invention.

In FIG. 4, the side wall 2A of the cylinder block 2 is provided with a breather chamber forming portion 31 that projects outward from the side wall 2A. The upper auxiliary equipment mounting portion 51 has a second rib 62 extending downward from the main body portion 51A at an end (left end portion) on the opposite side to the side where the first rib 61 is arranged in the cylinder row direction of the main body portion 51A. ing. The second rib 62 is connected to the breather chamber forming portion 31.

In FIGS. 3 and 4, the lower auxiliary equipment mounting portion 53 is arranged at the lower part of the flange portion 2B. A lower portion of the flange portion 2B is connected to the breather chamber forming portion 31 by a third rib 63.

In FIG. 5, the main body portion 51A of the upper auxiliary equipment mounting portion 51 has an auxiliary equipment fastening boss 51D. A screw hole 51C for attaching the accessory 1B is formed in the accessory fastening boss 51D.

A fourth rib 64 is provided on the outer edge of the upper surface of the main body portion 51A, and a fifth rib 65 is provided on the inner side of the upper surface of the main body portion 51A. The fourth rib 64 and the fifth rib 65 constitute an upper rib in the present invention. The auxiliary machine fastening boss 51D is connected to the head bolt fastening boss 43 by a fourth rib 64 and a fifth rib 65.

As described above, in this embodiment, the engine 1 includes a cylinder block 2 having a plurality of cylinders 27, a side wall 2A of the cylinder block 2 extending in the cylinder row direction, and a head bolt 41 for fastening the cylinder head 3. The cylinder block 2 has a plurality of head bolt fastening bosses 43 arranged at predetermined intervals on the side wall 2A of the cylinder block 2.

The engine 1 also includes an auxiliary machine 1B, which is arranged adjacent to the side wall 2A of the cylinder block 2, and to which power is transmitted from the crankshaft 6, and whose base end is connected to the side wall 2A of the cylinder block 2. It has an upper auxiliary equipment mounting part 51 to which the auxiliary equipment 1B is attached to the tip part.

The upper auxiliary equipment mounting portion 51 has a predetermined length in the cylinder row direction, and a base end portion of the upper auxiliary equipment mounting portion 51 is connected to the plurality of head bolt fastening bosses 43 .

In the engine 1 configured in this manner, the plurality of head bolt fastening bosses 43 in the cylinder block 2 have higher rigidity than other parts due to their shape and wall thickness. Since the head bolt fastening boss 43 having high rigidity is connected to the base end of the upper auxiliary equipment mounting part 51 having a predetermined length in the cylinder row direction, the upper auxiliary equipment mounting part 51 is connected to the cylinder block 2. It can be firmly connected to the side wall 2A of.

As a result, even when the upper auxiliary equipment mounting portion 51 that supports the auxiliary equipment 1B is integrated with the cylinder block 2, vibration of the auxiliary equipment 1B can be reduced.

Further, in this embodiment, the cylinder block 2 protrudes from the end (right end) in the cylinder row direction of the side wall 2A of the cylinder block 2 in a direction (rearward) intersecting the cylinder row direction, and the chain cover 21 is joined to the cylinder block 2. It has a flange portion 2B, and an end portion (right end portion) in the cylinder row direction of the upper auxiliary equipment mounting portion 51 is connected to the flange portion 2B.

In the engine 1 configured in this manner, the flange portion 2B has high rigidity due to its shape and wall thickness. Since the highly rigid flange portion 2B and the end of the upper auxiliary equipment mounting portion 51 in the cylinder row direction are connected, vibration of the tip of the upper auxiliary equipment mounting portion 51 can be suppressed.

Further, in this embodiment, the upper auxiliary equipment mounting portion 51 includes a plate-shaped main body 51A disposed near the upper end of the cylinder block 2, and extends downward from the end of the main body 51A in the cylinder row direction. and a first rib 61 that is connected to the flange portion 2B.

In the engine 1 configured in this manner, the highly rigid flange portion 2B and the main body portion 51A of the upper accessory mounting portion 51 are connected by the first rib 61, so that the upper accessory mounting portion 51 is further connected to the main body portion 51A of the upper accessory mounting portion 51. Vertical vibration can be suppressed.

Further, in this embodiment, the side wall 2A of the cylinder block 2 is provided with a breather chamber forming portion 31 that projects outward from the side wall 2A. The upper auxiliary equipment mounting portion 51 has a second rib 62 extending downward from the main body portion 51A at the end opposite to the side where the first rib 61 is arranged in the cylinder row direction of the main body portion 51A. The second rib 62 is connected to the breather chamber forming portion 31.

In the engine 1 configured in this manner, the main body portion 51A of the upper auxiliary equipment mounting portion 51 is connected to the breather chamber forming portion 31 by the second rib 62, so that the upper auxiliary equipment mounting portion 51 is further connected in the vertical direction. vibration can be suppressed.

Further, in this embodiment, the upper auxiliary equipment mounting portion 51 is configured to mount the upper part of the auxiliary equipment 1B, and the side wall 2A of the cylinder block 2 is configured to mount the lower auxiliary equipment mounting portion 53 to which the lower part of the auxiliary equipment 1B is mounted. have. The lower auxiliary equipment mounting portion 53 is disposed at the lower portion of the flange portion 2B, and the lower portion of the flange portion 2B is connected to the breather chamber forming portion 31 by a third rib 63.

In the engine 1 configured in this way, the lower part of the flange part 2B where the lower auxiliary equipment mounting part 53 is arranged and the breather chamber forming part 31 are connected by the third rib 63, so that the cylinder block 2 The coupling rigidity of the lower auxiliary equipment mounting portion 53 to the side wall 2A can be improved.

Further, the upper auxiliary equipment mounting portion 51 and the lower auxiliary equipment mounting portion 53 are integrally connected by the flange portion 2B, the first rib 61, the second rib 62, the third rib 63, and the breather chamber forming portion 31. Therefore, the rigidity of the upper auxiliary equipment mounting portion 51 and the lower auxiliary equipment mounting portion 53 can be improved, and vibration of the auxiliary equipment 1B in the vertical direction can be suppressed.

Although embodiments of the invention have been disclosed, it will be apparent that modifications may be made by one skilled in the art without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

1...Engine, 1B...Auxiliary equipment, 2...Cylinder block, 2A...Side wall, 2B...Flange part (block side cover part), 2C...Flange part (block side cover part) ), 3... Cylinder head, 6... Crankshaft, 21... Chain cover (cover member), 27... Cylinder, 31... Breather chamber forming part, 41... Head bolt, 42 ...Screw hole, 43...Head bolt fastening boss, 51...Upper auxiliary equipment mounting part (auxiliary equipment mounting part), 51A...Main body part, 53...Lower auxiliary equipment mounting part, 61 ...1st rib, 62...2nd rib, 63...3rd rib

Claims (5)

a cylinder block having multiple cylinders,
a side wall of the cylinder block extending in the cylinder row direction;
a plurality of head bolt fastening bosses arranged at predetermined intervals on the side wall, each having a screw hole in which a head bolt for fastening the cylinder head is fastened;
an auxiliary machine disposed adjacent to the side wall and to which power is transmitted from the crankshaft;
An engine accessory having an upper accessory mounting part whose base end is connected to the side wall, a top part of which is attached to the top of the accessory, and a lower accessory mounting part to which the lower part of the accessory is attached. A machine mounting structure,
The upper auxiliary equipment mounting portion extends above the auxiliary equipment, and the base end portion of the upper auxiliary equipment mounting portion is connected to the plurality of head bolt fastening bosses arranged in the cylinder row direction of the cylinder block. An engine auxiliary equipment mounting structure featuring: The cylinder block has a block-side cover portion that protrudes from an end in the cylinder row direction of the side wall in a direction intersecting the cylinder row direction, and to which the cover member is joined;
The engine auxiliary equipment mounting structure according to claim 1, wherein an end portion of the upper auxiliary equipment mounting portion in the cylinder row direction is connected to the block side cover portion. The upper auxiliary equipment mounting part includes a plate-shaped main body disposed near the upper end of the cylinder block, and extends downward from an end of the main body in the cylinder row direction and is connected to the block side cover part. The engine auxiliary equipment mounting structure according to claim 2, further comprising a first rib. The side wall is provided with a breather chamber forming portion that protrudes outward from the side wall,
The upper auxiliary equipment mounting portion has a second rib extending downward from the main body at an end opposite to the side where the first rib is arranged in the cylinder row direction of the main body,
4. The engine accessory mounting structure according to claim 3, wherein the second rib is connected to the breather chamber forming portion. The lower auxiliary equipment mounting part is arranged at the lower part of the block side cover part,
5. The engine auxiliary equipment mounting structure according to claim 4, wherein a lower part of the block-side cover part is connected to the breather chamber forming part by a third rib.

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