JP7310870B2 - Crank angle sensor mounting structure - Google Patents

Description

The present invention relates to a mounting structure for a crank angle sensor.

2. Description of the Related Art Conventionally, there is known a crank angle sensor arrangement structure in which a sensor for detecting the crank angle of an engine is provided on the front surface of the engine (see Patent Document 1).

In this crank angle sensor arrangement structure, the crank angle sensor is provided between the pump pulley and the chain cover, and the crank angle sensor is hidden inside the outermost diameter of the pump pulley in front projection of the engine. there is As a result, it is possible to avoid direct contact with water and stepping stones on the detection portion and the coupler portion of the crank angle sensor.

JP-A-2008-169730

However, in such a conventional crank angle sensor arrangement structure, the crank angle sensor is arranged so as to be hidden inside the outermost diameter of the pump pulley in the front projection of the engine, and the chain cover has a weak portion of rigidity. is installed in

As a result, the crank angle sensor may vibrate due to engine vibration. Therefore, there is still room for improvement in stably attaching the crank angle sensor to the engine.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is capable of suppressing vibration and deformation of a crank angle sensor due to vibrations of an internal combustion engine, and stably mounting a crank angle sensor to an internal combustion engine. It is an object of the present invention to provide a mounting structure for a crank angle sensor capable of

The present invention provides an engine body that has a cylinder block that houses a crankshaft, an oil pan that is attached to the lower part of the cylinder block, and an oil pan that is attached to the side surface of the engine body on the end side in the direction in which the crankshaft extends. and a sensing plate located outside the cover member and provided at the end of the crankshaft and having a plurality of teeth on an outer peripheral portion thereof. A crank angle sensor mounting structure for detecting the crank angle of the internal combustion engine by detecting a crank angle sensor mounting portion for mounting the crank angle sensor on the surface of the cover member, The cover member includes a bottom wall extending in the width direction of the cover member, a side wall extending upward from one end of the bottom wall in the width direction, and a bolt provided at the bottom of the side wall and having a central axis parallel to the crankshaft. and a block fastening boss portion fastened to the cylinder block by the crank angle sensor attachment portion, which extends from the upper end located on the side wall side at the corner portion on the side wall side of the lower surface of the cover member. It extends to the bottom wall, and the lower end in the extending direction is separated from one end in the width direction of the bottom wall toward the other end in the width direction of the bottom wall, and the upper end of the crank angle sensor mounting portion is located at the center of the bolt. The lower end of the crank angle sensor mounting portion is positioned above the shaft, the lower end of the crank angle sensor mounting portion is positioned below the central axis of the bolt, and the oil pan has a boss portion below the block fastening boss portion. is provided, a rib extends from the boss portion toward the block fastening boss portion, and the boss portion and the bottom wall are connected by the rib.

As described above, according to the present invention, the crank angle sensor can be suppressed from vibrating or deforming due to vibration of the internal combustion engine, and the crank angle sensor can be stably attached to the internal combustion engine.

FIG. 1 is a right side view of a vehicle equipped with a crank angle sensor mounting structure according to an embodiment of the present invention. FIG. 2 is a right side view of an engine equipped with a crank angle sensor mounting structure according to an embodiment of the present invention. FIG. 3 is a front view of an engine equipped with a crank angle sensor mounting structure according to an embodiment of the present invention. FIG. 4 is an enlarged front view of the engine around the air conditioner compressor in the mounting structure of the crank angle sensor according to one embodiment of the present invention. FIG. 5 is an enlarged right side view of the engine around the crank angle sensor mounting portion in the crank angle sensor mounting structure according to one embodiment of the present invention. FIG. 6 is an enlarged perspective view of the engine around the crank angle sensor mounting portion in the crank angle sensor mounting structure according to one embodiment of the present invention. FIG. 7 is an enlarged front view of the engine around the crank angle sensor mounting portion in the crank angle sensor mounting structure according to one embodiment of the present invention.

A crank angle sensor mounting structure according to an embodiment of the present invention includes an engine body having a cylinder block that houses a crankshaft, an oil pan attached to the lower part of the cylinder block, and an end of the crankshaft in the extending direction. An internal combustion engine comprising a cover member attached to the side surface of the engine body on the side of the engine, and a sensing plate located outside the cover member and provided at the end of the crankshaft and having a plurality of teeth on the outer peripheral portion. A mounting structure for a crank angle sensor for detecting a crank angle of an internal combustion engine by detecting teeth of a sensing plate, wherein a crank angle sensor mounting portion to which the crank angle sensor is mounted is provided on the surface of the cover member. The cover member is composed of a bottom wall extending in the width direction of the cover member, a side wall extending upward from one end of the bottom wall in the width direction, and a bolt provided at the bottom of the side wall and having a central axis parallel to the crankshaft. and a block fastening boss portion fastened to the cylinder block, the crank angle sensor mounting portion extending from the upper end located on the side wall side to the bottom wall at the corner portion on the side wall side of the lower surface of the cover member, and , the lower end in the extending direction is separated from one end in the width direction of the bottom wall toward the other end in the width direction of the bottom wall, and the upper end of the crank angle sensor mounting portion is positioned above the center axis of the bolt, The lower end of the portion is located below the central axis of the bolt.
As a result, the crank angle sensor can be prevented from vibrating or deforming due to vibrations of the internal combustion engine, and the crank angle sensor can be stably attached to the internal combustion engine.

A mounting structure of a crank angle sensor according to an embodiment of the present invention will be described below with reference to the drawings.
1 to 7 are diagrams showing a mounting structure of a crank angle sensor according to one embodiment of the present invention. 1 to 7, when the direction in which the vehicle moves forward is the front and the direction in which the vehicle moves backward is the rear, the width direction of the vehicle is the left and right direction, and the height direction of the vehicle is the vertical direction.

First, the configuration will be explained.
In FIG. 1, a vehicle 1 includes a vehicle body member 2 and an engine 3 as an internal combustion engine. The vehicle body member 2 includes a bumper member 4, a front grille 5 attached to the bumper member 4, and a hood lock member 8 installed above the bumper member 4 and connected to the bumper member 4 by a plurality of side braces 6 (one shown). have

An engine room 9 is formed behind the vehicle body member 2 , and the engine 3 is installed in the engine room 9 . An opening 5A is formed in the front grille 5, and running wind is taken into the engine room 9 through the opening 5A when the vehicle 1 is running.

1 and 2, the engine 3 includes a cylinder block 11, a cylinder head 12, a cylinder head cover 13 and an oil pan 14. As shown in FIG. The cylinder block 11 , cylinder head 12 , cylinder head cover 13 and oil pan 14 of this embodiment constitute an engine body 15 .

A plurality of cylinders (not shown) are provided in the cylinder block 11 . A piston (not shown) is accommodated in the cylinder, and the piston reciprocates vertically with respect to the cylinder.

The piston is connected to the crankshaft 11S (see FIG. 3) via a connecting rod (not shown), and the reciprocating motion of the piston is converted to rotational motion of the crankshaft 11S via the connecting rod.

The crankshaft 11S is installed in the cylinder block 11 so as to extend in the front-rear direction, and the cylinders are arranged in the front-rear direction. Thus, the engine 3 of this embodiment constitutes a longitudinal engine. 2 and 5, the axis of the crankshaft 11S is indicated by a phantom line.

1 and 2, the cylinder head 12 includes a plurality of intake ports 12A, a plurality of intake valves (not shown) for opening and closing the intake ports 12A, a plurality of exhaust ports (not shown), and a plurality of valves (not shown) for opening and closing the exhaust ports. and an exhaust valve.

A valve train chamber (not shown) is formed between the cylinder head 12 and the cylinder head cover 13. An intake camshaft having an intake cam (not shown) and an exhaust camshaft having an exhaust cam (not shown) are installed in the valve train chamber. It is

The intake cam opens and closes the intake port by driving the intake valve as the intake camshaft rotates. The exhaust cam opens and closes the exhaust port by driving the exhaust valve as the exhaust camshaft rotates.

A chain cover 16 is attached to the front surfaces of the cylinder block 11 and the cylinder head 12, which are on the front end side in the direction in which the crankshaft 11S extends. The chain cover 16 covers the timing chain (not shown) provided on the front surfaces of the cylinder block 11 and the cylinder head 12 from the front.

A timing chain covered by the chain cover 16 connects the crankshaft 11S with the exhaust camshaft and the intake camshaft, and transmits the power of the crankshaft 11S to the exhaust camshaft and the intake camshaft.
The chain cover 16 of this embodiment constitutes the cover member of the present invention.

The oil pan 14 stores oil for lubricating lubrication parts such as the crankshaft 11S and the pistons. The oil stored in the oil pan 14 is sucked by an oil pump (not shown), filtered by an oil filter 17 (see FIG. 2), and then supplied to lubricating parts.

3, a water pump pulley 21, a crank pulley 22, a generator pulley 23, a compressor pulley 24 and an idler pulley 25 are rotatably provided on the front surface of the engine 3. As shown in FIG.

The water pump pulley 21 is fixed to an input shaft 21A of a water pump (not shown) attached to the chain cover 16, and the water pump pulley 21 rotates together with the input shaft 21A to transmit power to the water pump.

The crank pulley 22 is fixed to the front end of the crankshaft 11S. The crank pulley 22 is integrally provided with a front pulley 22A and a rear pulley 22B, and rotates clockwise integrally with the crankshaft 11S.

The generator pulley 23 is fixed to an input shaft 26A of a generator 26 attached to the cylinder block 11 and rotates together with the input shaft 26A to transmit power to the generator 26 . The generator 26 generates electric power by electromagnetic induction when a rotor (not shown) provided on the input shaft 26A rotates, and charges a battery (not shown).

The compressor pulley 24 is fixed to an input shaft 27A of an air conditioner compressor 27 attached to the cylinder block 11 and rotates together with the input shaft 27A to transmit power to the air conditioner compressor 27 .

The idler pulley 25 is rotatably supported by the chain cover 16 . The air conditioner compressor 27 of this embodiment constitutes an accessory of the present invention.

An endless belt 28A is wound around the water pump pulley 21, the rear pulley 22B of the crank pulley 22, the generator pulley 23 and the idler pulley 25. As shown in FIG. Belt 28A rotationally drives water pump and generator 26 by transmitting power of crankshaft 11S from front pulley 22A to water pump pulley 21 and generator pulley 23, respectively.

An endless belt 28B is wound around the front pulley 22A of the crank pulley 22 and the compressor pulley 24 . The belt 28B rotates the air conditioner compressor 27 by transmitting the power of the crankshaft 11S from the rear pulley 22B to the compressor pulley 24 . The belt 28B of this embodiment constitutes the belt of the present invention.

The idler pulley 25 is provided between the crank pulley 22 and the generator pulley 23 so as to apply constant tension to the belt 28A.

The air conditioner compressor 27 is driven by power transmitted from the crankshaft 11S to the air conditioner compressor 27 via the belt 28B, and compresses the refrigerant to a high pressure.

3 and 4, the air conditioner compressor 27 has an upper boss portion 27B and a lower boss portion 27C located below the upper boss portion 27B, and a gap between the upper boss portion 27B and the lower boss portion 27C in the vertical direction. A positioned intermediate boss portion 27D is provided. The upper boss portion 27B protrudes from the air conditioner compressor 27 toward the right side wall 16a of the chain cover 16. As shown in FIG.

A boss portion 16A is provided on the front surface 16F on the right side wall 16a side of the chain cover 16 (see FIG. 5), and the upper boss portion 27B is fastened to the boss portion 16A with bolts 34A.

A boss portion 14A is provided on the right side surface 14a of the oil pan 14 (see FIG. 5), and the lower boss portion 27C is fastened to the boss portion 14A with bolts 34B. The right side surface 14a of the oil pan 14 of this embodiment constitutes the vehicle width direction side surface of the oil pan of the present invention.

In FIG. 2, a boss portion 11A is provided on the right side surface 11a of the cylinder block 11, and an intermediate boss portion 27D is fastened to the boss portion by bolts 34C.

The boss portion 16A of this embodiment constitutes the boss portion for mounting accessory equipment on the cover side of the present invention, and the boss portion 14A constitutes the boss portion for mounting accessory equipment on the oil pan side of the present invention.

4 to 6, a disc-shaped sensing plate 35 is provided at the front end of the crankshaft 11S. The sensing plate 35 is installed behind the crank pulley 22 and rotates integrally with the crankshaft 11S.

A plurality of teeth 35A are provided on the outer peripheral edge of the sensing plate 35, and the teeth 35A are provided along the circumferential direction.

A crank angle sensor 36 is provided in the engine 3, and the crank angle sensor 36 outputs a pulse signal to a controller (not shown) each time it detects a tooth 35A of the sensing plate 35 that rotates. The controller calculates the crank angle and rotation speed of the engine 3 based on the pulse signal output from the crank angle sensor 36 .

A toothless section 35B in which no teeth 35A are formed is formed on the outer peripheral portion of the sensing plate 35, and the crank angle sensor 36 detects the toothless section 35B to accurately detect the reference position of the crankshaft 11S. can.

4 and 6, the crank angle sensor 36 is attached to the boss portion 37. As shown in FIG. The boss portion 37 is provided on the lower right portion 16b of the front surface 16F of the chain cover 16 (see FIG. 7). The lower right portion 16b is positioned at the right and lower corner of the front face 16F of the chain cover 16, and the lower right portion 16b of this embodiment constitutes the corner of the present invention. Further, the front surface 16F of the chain cover 16 constitutes the surface of the cover member of the present invention.

7, the chain cover 16 has a bottom wall 16c extending in the width direction (vehicle width direction) of the chain cover 16 and a right side wall 16a extending upward from one width direction end 16d of the bottom wall 16c.

The boss portion 37 extends from an upper end 37a located on the right side wall 16a to the bottom wall 16c at the lower right portion 16b of the chain cover 16, and the lower end 37b in the extending direction extends from one widthwise end 16d of the bottom wall 16c to the bottom wall 16c. It is separated from the other widthwise end 16e (see FIGS. 3 and 4). The right side wall 16a of this embodiment constitutes the side wall of the cover member of the present invention.

4 and 7, the lower portion of the right side wall 16a of the chain cover 16 has a linear portion 16s extending linearly, and the boss portion 37 is inclined with respect to a virtual plane 40 parallel to the linear portion 16s. The straight portion 16s is formed in a range from the oil pan 14 to the upper boss portion 27B in the vertical direction.

In FIG. 4, the crank angle sensor 36 has a sensor body 36A with a linear axis 36a.

The crank angle sensor 36 has a detection section 36B provided at one end in the axial direction (the direction of the axis 36a) of the sensor main body 36A so as to face the sensing plate 35. A pulse signal is generated each time the tooth 35A is detected.

The crank angle sensor 36 has a coupler 36C provided at the other end in the axial direction of the sensor main body 36A, and wiring (not shown) is electrically connected to the coupler 36C. The coupler 36C outputs the signal from the detector 36B to the controller via wiring.

The sensor main body 36A is provided with a flange portion 36b having a through hole (not shown).
5, the boss portion 37 is formed with an opening portion 37A, a bolt hole 37B and a mounting surface 37c.

A mounting surface 37c of the boss portion 37 is inclined at a predetermined angle θ1 with respect to a virtual plane 40 parallel to the straight portion 16s. The crank angle sensor 36 has a sensor main body 36A inserted into an opening 37A of the boss portion 37 and a flange portion 36b in contact with a mounting surface 37c.

A bolt (not shown) is fastened to the bolt hole 37B of the boss portion 37 through the through hole of the flange portion 36b. Thereby, the crank angle sensor 36 is fixed to the boss portion 37 .

3, the boss portion 37 is installed between the boss portion 16A of the chain cover 16 and the boss portion 14A of the oil pan 14 in the vertical direction. 27 facing.

6, the chain cover 16 is provided with a boss portion 16B, and the boss portion 16B is provided at one end 16d in the width direction of the bottom wall 16c of the chain cover 16. As shown in FIG. A boss portion 14B is provided on the upper portion of the oil pan 14 facing the boss portion 16B in the vertical direction.

The oil pan 14 is fastened to the chain cover 16 by fastening a bolt 34D to the boss portion 16B through the boss portion 14B from below the boss portion 14B. The bolt 34D has a central axis 34d that extends vertically and passes through the boss portion 37. As shown in FIG. The boss portion 16B of this embodiment constitutes the oil pan fastening boss portion of the present invention.

A boss portion 16</b>C is provided on the chain cover 16 , and the boss portion 16</b>C is provided on the right side wall 16 a of the chain cover 16 . A boss portion 11B is provided on the right side surface of the cylinder block 11 facing the boss portion 16C in the front-rear direction.

The chain cover 16 is fastened to the cylinder block 11 by fastening bolts 34E to the boss portion 11B through the boss portion 16C from the front side. The bolt 34E has a central axis 34e parallel to the crankshaft 11S. The boss portion 16C of this embodiment constitutes the block fastening boss portion of the present invention.

In FIG. 7, the upper end 37a of the boss portion 37 is positioned on the right side wall 16a side (right side) with respect to the central axis 34d of the bolt 34D, and the lower end 37b of the boss portion 37 is positioned with respect to the central axis 34d of the bolt 34D. It is located on the crank pulley 22 side, which is the opposite side (left side).

In FIG. 5, the upper end 37a of the boss portion 37 is located above the central axis 34e of the bolt 34E, and the lower end 37b of the boss portion 37 is located below the central axis 34e of the bolt 34E.

5 and 6, the boss portions 14A and 16B are spaced apart from each other in the axial direction of the crankshaft 11S, and the boss portion 14A is located behind the boss portion 16B and further than the boss portion 16C. installed below.

A rib 41 is connected to the upper end of the boss portion 14A. The rib 41 extends from the upper end of the boss portion 14A toward the boss portion 16C of the chain cover 16 and connects the boss portion 14A and the bottom wall 16c of the chain cover 16. As shown in FIG.

The bolt 34D of this embodiment constitutes the bolt and the first bolt of the invention, and the bolt 34E constitutes the second bolt of the invention.

According to the mounting structure of the crank angle sensor 36 of this embodiment, the front face 16F of the chain cover 16 is provided with the boss portion 37 to which the crank angle sensor 36 is mounted. The chain cover 16 has a bottom wall 16c extending in the width direction of the chain cover 16 and a right side wall 16a extending upward from one width direction end 16d of the bottom wall 16c.

The boss portion 37 extends from an upper end 37a located on the right side wall 16a to the bottom wall 16c at the lower right portion 16b of the chain cover 16, and the lower end 37b in the extending direction extends from one widthwise end 16d of the bottom wall 16c to the bottom wall. It is separated from the other end 16e in the width direction of 16c.

The lower right portion 16b of the chain cover 16 has a curved shape where the right side wall 16a and the bottom wall 16c intersect, so that the chain cover 16 has high rigidity.

As a result, the rigidity of the boss portion 37 can be increased by installing the boss portion 37 in the lower right portion 16b of the chain cover 16, which has the highest rigidity. Therefore, the crank angle sensor 36 can be attached to the boss portion 37 having high rigidity, and vibration and deformation of the boss portion 37 can be suppressed when the engine 3 vibrates.

Therefore, it is possible to prevent the crank angle sensor 36 from vibrating or deforming due to the vibration of the engine 3 , so that the crank angle sensor 36 can be stably attached to the engine 3 .

Further, by separating the lower end 37b of the boss portion 37 from the one widthwise end 16d of the bottom wall 16c toward the other widthwise end 16e of the bottom wall 16c, the boss portion 37 can be tilted with respect to the right side wall 16a.

Therefore, when the engine 3 vibrates, the rigidity of the boss portion 37 can be increased against vertical vibration along the right side wall 16a and horizontal vibration along the bottom wall 16c. Therefore, it is possible to prevent the boss portion 37 from vibrating or deforming in the vertical and horizontal directions due to the vibration of the engine 3, and the crank angle sensor 36 can be attached to the engine 3 more stably. As a result, deterioration in detection accuracy of the crank angle of the engine 3 can be prevented.

Further, according to the mounting structure of the crank angle sensor 36 of this embodiment, the chain cover 16 has the boss portion 16B which is provided at one end 16d in the width direction of the bottom wall 16c and fastened to the oil pan 14 with the bolts 34D.

In addition, the upper end 37a of the boss portion 37 is located on the right side wall 16a side with respect to the central axis 34d of the bolt 34D, and the lower end 37b of the boss portion 37 is positioned closer to the right side wall 16a with respect to the central axis 34d of the bolt 34D. and opposite.

Thereby, the rigidity of the bottom wall 16c of the chain cover 16 can be further increased by the boss portion 16B and the bolt 34D. Therefore, when the engine 3 vibrates, the rigidity of the boss portion 37 can be further increased against vibration in the lateral direction along the bottom wall 16c.

As a result, lateral vibration and deformation of the boss portion 37 due to vibrations of the engine 3 can be more effectively suppressed, and the crank angle sensor 36 can be mounted on the engine 3 more effectively and stably. As a result, deterioration in detection accuracy of the crank angle of the engine 3 can be prevented more effectively.

Further, according to the mounting structure of the crank angle sensor 36 of this embodiment, the chain cover 16 has the boss portion 16C which is provided on the lower portion of the right side wall 16a and fastened to the cylinder block 11 with the bolts 34E.

In addition, the upper end 37a of the boss portion 37 is located above the central axis 34e of the bolt 34E, and the bottom wall 16c of the boss portion 37 is located below the central axis 34e of the bolt 34E.

As a result, the rigidity of the right side wall 16a of the chain cover 16 can be further increased by the boss portion 16C and the bolt 34E. Therefore, when the engine 3 vibrates, the rigidity of the boss portion 37 can be further increased against vertical vibration along the right side wall 16a.

Therefore, vertical vibration and deformation of the boss portion 37 due to vibration of the engine 3 can be more effectively suppressed, and the crank angle sensor 36 can be more stably attached to the engine 3 . As a result, deterioration in detection accuracy of the crank angle of the engine 3 can be prevented more effectively.

Further, according to the mounting structure of the crank angle sensor 36 of this embodiment, the engine main body 15 is provided with the air conditioner compressor 27 driven by the power of the crankshaft 11S, and the air conditioner compressor 27 is provided in the oil pan 14. is fastened to the boss portion 14B.

The boss portion 14A and the boss portion 16B are installed apart in the axial direction of the crankshaft 11S, and the boss portion 14A is installed below the boss portion 16C. In addition, a rib 41 extends from the boss portion 14A toward the boss portion 16C, and the boss portion 14A and the bottom wall 16c of the chain cover 16 are connected by the rib 41.

Thus, by connecting the boss portion 14A and the bottom wall 16c with high rigidity by the rib 41, the rigidity of the oil pan 14 around the boss portion 14A can be further increased, and the chain around the rib 41 and the boss portion 16C can be increased. The rigidity of the right side wall 16a and the bottom wall 16c of the cover 16 can be further increased.

Therefore, the rigidity of the boss portion 37 extending from the right side wall 16 a to the bottom wall 16 c can be effectively increased, and vibration and deformation of the boss portion 37 due to vibration of the engine 3 can be more effectively suppressed.

Therefore, the crank angle sensor 36 can be attached to the engine 3 more stably. As a result, deterioration in detection accuracy of the crank angle of the engine 3 can be prevented more effectively.

Further, according to the mounting structure of the crank angle sensor 36 of this embodiment, the chain cover 16 is provided with the boss portion 16A.

The air-conditioning compressor 27 projects from the air-conditioning compressor 27 toward the boss portion 16A, an upper boss portion 27B fastened to the boss portion 16A, and projecting from the air-conditioning compressor 27 toward the boss portion 14A below the upper boss portion 27B, and a lower boss portion 27C fastened to the boss portion 14A.

In addition, the boss portion 37 is installed between the boss portion 16A and the boss portion 14A in the vertical direction.
As a result, the air conditioner compressor 27 can be fastened to the oil pan 14 and the right side wall 16 a of the chain cover 16 so as to straddle the oil pan 14 and the chain cover 16 .

Therefore, the rigidity of the oil pan 14 and the right side wall 16a of the chain cover 16 around the boss portion 37 can be further increased. That is, the oil pan 14 and the right side wall 16 a of the chain cover 16 can be reinforced by the air conditioner compressor 27 .

Therefore, when the engine 3 vibrates, vertical vibration along the right side wall 16a around the boss portion 37 can be more effectively suppressed, and the boss portion 37 can be prevented from vibrating or deforming in the vertical direction. can be suppressed more effectively.

Therefore, the crank angle sensor 36 can be attached to the engine 3 more stably. As a result, deterioration in detection accuracy of the crank angle of the engine 3 can be prevented more effectively.

Although embodiments of the present invention have been disclosed, it will be apparent that modifications may be made by those 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...Vehicle, 3...Engine (internal combustion engine), 11...Cylinder block, 11S...Crankshaft, 14...Oil pan, 14A...Boss part (Oil pan side accessory attachment 15...Engine body 16...Chain cover (cover member) 16A...Boss part (boss part for mounting accessories on the cover side) 16B...Boss part (Oil pan fastening 16C... Boss part (boss part for block fastening), 16F... Front surface (surface of cover member), 16a... Right side wall (side wall of cover member), 16b... Right lower part (Corner portion), 16c... bottom wall (bottom wall of cover member), 16d... one end in width direction (one end in width direction of bottom wall), 16e... other end in width direction (width direction of bottom wall, etc.) end), 27... air conditioner compressor (auxiliary machine), 27B... upper boss portion, 27C... lower boss portion, 28B... belt, 34D... bolt (first bolt), 34d ... central axis (central axis of bolt, central axis of first bolt), 34E ... bolt (second bolt), 34e ... central axis (central axis of second bolt), 35 . .. Sensing plate, 35A... tooth (sensing plate tooth), 36... crank angle sensor, 37... boss (crank angle sensor mounting part), 37a... upper end (crank angle sensor mounting part) upper end), 37b... lower end (lower end of crank angle sensor mounting part), 41... rib

Claims (2)

an engine body having a cylinder block housing a crankshaft and an oil pan attached to a lower portion of the cylinder block;
a cover member attached to the side surface of the engine body on the end side in the direction in which the crankshaft extends;
provided in an internal combustion engine comprising a sensing plate located outside the cover member and provided at the end of the crankshaft and having a plurality of teeth on the outer peripheral portion;
A mounting structure for a crank angle sensor that detects the crank angle of the internal combustion engine by detecting the teeth of the sensing plate,
A crank angle sensor mounting portion to which the crank angle sensor is mounted is provided on the surface of the cover member,
The cover member includes a bottom wall extending in the width direction of the cover member, a side wall extending upward from one end of the bottom wall in the width direction, and a bolt provided at the bottom of the side wall and having a central axis parallel to the crankshaft. and a block fastening boss portion fastened to the cylinder block by
The crank angle sensor mounting portion extends from an upper end located on the side wall side to the bottom wall at a corner portion on the side wall side of the lower surface of the cover member, and the lower end in the extending direction extends to the width of the bottom wall. It is separated from the one end in the direction to the other end in the width direction of the bottom wall,
The upper end of the crank angle sensor mounting portion is positioned above the central axis of the bolt, the lower end of the crank angle sensor mounting portion is positioned below the central axis of the bolt ,
The oil pan is provided with a boss portion below the block fastening boss portion,
A rib extends from the boss portion toward the block fastening boss portion,
A mounting structure for a crank angle sensor , wherein the boss portion and the bottom wall are connected by the rib . The rib is composed of a pair of ribs extending upward,
2. The crank angle sensor mounting structure according to claim 1, wherein the block fastening boss portion is positioned between the pair of ribs in the axial direction of the crankshaft .

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