CN110735731B - Cover structure of internal combustion engine - Google Patents

Cover structure of internal combustion engine Download PDF

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Publication number
CN110735731B
CN110735731B CN201910650168.XA CN201910650168A CN110735731B CN 110735731 B CN110735731 B CN 110735731B CN 201910650168 A CN201910650168 A CN 201910650168A CN 110735731 B CN110735731 B CN 110735731B
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CN
China
Prior art keywords
cover
side wall
boss
internal combustion
opening
Prior art date
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Active
Application number
CN201910650168.XA
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Chinese (zh)
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CN110735731A (en
Inventor
小杉裕太郎
和田壮大郎
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Suzuki Motor Corp
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Suzuki Motor Corp
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Publication date
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Publication of CN110735731A publication Critical patent/CN110735731A/en
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Publication of CN110735731B publication Critical patent/CN110735731B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0021—Construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/348—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by means acting on timing belts or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M1/00—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds
    • F16M1/02—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds for reciprocating engines or similar machines
    • F16M1/026—Frames or casings of engines, machines or apparatus; Frames serving as machinery beds for reciprocating engines or similar machines for housing movable engine or machine parts other than crankshafts, e.g. valve-gear housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34496—Two phasers on different camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
    • F02F2007/0078—Covers for belt transmissions

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

A cover structure of an internal combustion engine is provided, which can suppress vibration of a cover member due to vibration of an engine body, and can enhance the support rigidity of a drive device to suppress vibration of the drive device. A chain cover (18) attached to the right end of an engine body (7) has an attachment section (22), and the attachment section (22) is provided on the cover section (19), is located on the opposite side of the opening section (19a) with respect to the boss section (30) in the width direction of the cover section (19), and is used for attaching a right anti-vibration attachment member (3R) provided on the right side member (2R) side. An upper end portion (22u) of the mounting piece fitting portion (22) is provided above the cover portion (19) with respect to a lower end portion (19g) of the opening portion (19a), and a boss portion (30) is provided so as to overlap the opening portion (19a) in the width direction of the cover portion (19) and is coupled to the mounting piece fitting portion (22).

Description

Cover structure of internal combustion engine
Technical Field
The present invention relates to a cover structure for an internal combustion engine mounted on a vehicle.
Background
An internal combustion engine mounted on a vehicle is known to include a motor driver including an electric motor that drives a variable valve timing device (see, for example, patent document 1).
In patent document 1, a motor driver includes an electric motor and a housing that is attached to an outer surface of a chain case covering one side of an internal combustion engine and contains the electric motor. The motor driver is fixed to the chain case by fitting the other end portion of the case into an opening portion formed in the chain case.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2013-113100
Disclosure of Invention
Problems to be solved by the invention
However, in the conventional internal combustion engine, since a weight such as a motor driver is attached to the chain case having the opening portion, the rigidity of the chain case is lowered. Therefore, the chain case may vibrate due to the vibration of the internal combustion engine, and cause the motor driver to vibrate.
The present invention has been made in view of the above-described problems, and an object thereof is to provide a cover structure for an internal combustion engine, which can suppress vibration of a cover member due to vibration of an engine main body, and can improve support rigidity of a drive device to suppress vibration of the drive device.
Means for solving the problems
The cover structure of an internal combustion engine of the present invention includes: an engine main body having a crankshaft, a camshaft, and a variable valve mechanism that changes a relative rotational phase of the camshaft with respect to the crankshaft; and a cover member attached to an end portion of the engine main body, the cover member including: a cover portion that covers the end portion of the engine main body; a 1 st side wall portion and a 2 nd side wall portion which are provided on both sides in a width direction of the cover portion and are fastened to the end portion of the engine main body; and an opening portion formed in the cover portion for mounting a drive device for driving the variable valve mechanism, wherein the cover member includes: a boss portion that extends from the cover portion toward the engine main body and is joined to the engine main body; and a mounting piece attachment portion that is provided on the cover portion and is located on a side opposite to the opening portion with respect to the boss portion in a width direction of the cover portion, and that is used for attaching a mounting member provided on a vehicle body side, an upper end portion of the mounting piece attachment portion being provided above the cover portion with respect to a lower end portion of the opening portion, and the boss portion being provided so as to overlap the opening portion in the width direction of the cover portion and being coupled to the mounting piece attachment portion.
Effects of the invention
Thus, according to the present invention described above, the cover member can be suppressed from vibrating due to the vibration of the engine main body, and the support rigidity of the drive device can be increased to suppress the vibration of the drive device.
Drawings
Fig. 1 is a front view of a power train provided with a cover structure of an internal combustion engine according to an embodiment of the present invention.
Fig. 2 is a right side view of a chain cover provided to a cover structure of an internal combustion engine according to an embodiment of the present invention.
Fig. 3 is a left side view of a chain cover provided to a cover structure of an internal combustion engine according to an embodiment of the present invention, illustrating a timing chain, a variable valve mechanism, and a camshaft provided to an engine main body side.
Fig. 4 is a right side view of a chain cover provided to a cover structure of an internal combustion engine according to an embodiment of the present invention, showing a state in which an electric actuator is removed.
Fig. 5 is a left side view of a chain cover provided to the cover structure of the internal combustion engine according to the embodiment of the present invention, and shows a state in which the electric actuator is removed.
Fig. 6 is an upper perspective view of a chain cover provided to a cover structure of an internal combustion engine according to an embodiment of the present invention.
Description of the reference numerals
1: vehicle, 2R: right side member (vehicle body), 5: engine (internal combustion engine), 7: engine main body, 9: intake camshaft (camshaft), 10: exhaust camshaft (camshaft), 11a, 12 a: right end portion (end portion of engine main body), 15: crankshaft, 18: chain cover (cover member), 19: cover portion, 19A: sidewall (1 st sidewall), 19B: sidewall (No. 2 sidewall), 19 a: opening, 19 b: outer peripheral edge portion, 19 g: lower end (lower end of opening), 19 u: upper wall portion (No. 3 side wall portion), 22: mounting member attachment portion, 22 u: upper end portion (upper end portion of mounting piece attachment portion), 22 s: space (space inside the mounting member attachment portion), 25: oil passage portion, 25 a: oil passage, 25 f: tip end (end in the extending direction of oil passage), 27: hydraulic cylinder section, 27 f: front end portion (one end portion in the extending direction of the cylinder portion), 27 r: rear end portion (the other end portion in the extending direction of the cylinder portion), 28: hydraulic control valve, 30: boss portion, 41: rib (1 st reinforcing part), 42: rib (No. 2 reinforcing portion), 51: intake-side variable valve mechanism (variable valve mechanism), 43: cross rib (No. 3 reinforcing portion), 52: an electric actuator (driving device).
Detailed Description
A cover structure of an internal combustion engine according to an embodiment of the present invention includes: an engine main body having a crankshaft, a camshaft, and a variable valve mechanism that changes a relative rotational phase of the camshaft with respect to the crankshaft; and a cover member that is fitted to an end portion of the engine main body, the cover member having: a cover portion that covers an end portion of the engine main body; a 1 st side wall portion and a 2 nd side wall portion provided on both sides in the width direction of the hood portion and fastened to end portions of the engine main body; and an opening portion formed in the cover portion for fitting a drive device for driving the variable valve mechanism, in a cover structure of an internal combustion engine, the cover member having: a boss portion extending from the cover portion toward the engine main body and joined to the engine main body; and a mount fitting portion provided to the cover portion on a side opposite to the opening portion in a width direction of the cover portion with respect to the boss portion, for fitting a mount member provided to a vehicle body side, an upper end portion of the mount fitting portion being provided at a position above the cover portion than a lower end portion of the opening portion, the boss portion being provided to overlap the opening portion in the width direction of the cover portion and being coupled to the mount fitting portion.
This can suppress the cover member from vibrating due to the vibration of the engine body, and can improve the support rigidity of the drive device to suppress the vibration of the drive device.
[ examples ]
Hereinafter, an embodiment of a cover structure of an internal combustion engine according to the present invention will be described with reference to the drawings.
Fig. 1 to 6 are diagrams showing a cover structure of an internal combustion engine according to an embodiment of the present invention. In fig. 1 to 6, regarding the up-down, front-back, and left-right directions, when the direction in which the vehicle travels is defined as front and the direction in which the vehicle retreats is defined as rear, the width direction of the vehicle is the left-right direction, and the height direction of the vehicle is the up-down direction.
First, the configuration is explained.
In fig. 1, a vehicle 1 includes a left side member 2L and a right side member 2R. The left side member 2L and the right side member 2R are separated in the width direction of the vehicle 1 (hereinafter referred to as the vehicle width direction) and extend in the front-rear direction. The right side member 2R of the present embodiment constitutes the vehicle body of the present invention.
Left and right vibration-proof mounting members 3L and 3R are provided on the left and right side members 2L and 2R, respectively. The left and right vibration-proof mounting members 3L and 3R are joined to the power train 4, and the power train 4 is elastically supported to the left and right side members 2L and 2R by the left and right vibration-proof mounting members 3L and 3R.
The power train 4 includes an engine 5 and a transmission 6 as internal combustion engines, and the engine 5 and the transmission 6 are arranged inside the left side member 2L and the right side member 2R in the vehicle width direction. The engine 5 converts thermal energy into mechanical energy, and the transmission 6 changes the rotational speed of the engine 5 and outputs the changed rotational speed.
The engine 5 includes an engine body 7, and the engine body 7 includes a cylinder block 11, a cylinder head 12, a head cover 13, and an oil pan 14.
A chain cover 18 (see fig. 2 and 3) is attached to right end portions 11a and 12a of the cylinder block 11 and the cylinder head 12 and a right end portion, not shown, of the head cover 13, and the chain cover 18 covers the timing chain 8 provided at the right end portion of the engine main body 7 from the right.
The chain cover 18 of the present embodiment constitutes a cover member of the present invention, and right end portions 11a and 12a of the cylinder block 11 and the cylinder head 12 in the vehicle width direction and a right end portion, not shown, of the cylinder head cover 13 constitute an end portion of the engine main body of the present invention. Hereinafter, the right end portions 11a and 12a of the cylinder block 11 and the cylinder head 12 in the vehicle width direction and the right end portion of the head cover 13 are referred to as the right end portion of the engine body 7.
The cylinder block 11 is provided with a plurality of cylinders, not shown. The cylinder houses a piston, not shown, which reciprocates in the vertical direction relative to the cylinder. The pistons are coupled to a crankshaft 15 (see fig. 2) by unillustrated connecting rods, and the reciprocating motion of the pistons is converted into rotational motion of the crankshaft 15 by the connecting rods.
In fig. 1, the rotation center axis of the crankshaft 15 is indicated by a broken line. The crankshaft 15 extends in the vehicle width direction, and the engine 5 is a horizontal engine.
The cylinder head 12 is provided with: a plurality of air inlets not shown; a plurality of intake valves 9V (indicated by broken lines in fig. 1) that open and close the intake ports; a plurality of air outlets not shown; and a plurality of exhaust valves, not shown, that open and close the exhaust ports. The intake port introduces air into the cylinder, and the exhaust port exhausts exhaust gas burned in the cylinder from the cylinder.
The intake valve 9V and the exhaust valve are provided in 2 numbers with respect to 1 cylinder, respectively, and the engine 5 of the present embodiment is constituted by a 4-cylinder engine, for example. Further, the number of cylinders is not limited to 4 cylinders.
A valve chamber, not shown, is formed between the cylinder head 12 and the cylinder head cover 13, and the intake camshaft 9 and the exhaust camshaft 10 shown in fig. 3 are housed in the valve chamber.
In fig. 3, a crank sprocket 15A is provided at an end portion of the crankshaft 15, and an intake cam sprocket 9A and an exhaust cam sprocket 10A are provided at end portions of the intake camshaft 9 and the exhaust camshaft 10, respectively.
A timing chain 8 is wound around the crank sprocket 15A, the intake cam sprocket 9A, and the exhaust cam sprocket 10A, and the crankshaft 15, the intake camshaft 9, and the exhaust camshaft 10 are coupled by the timing chain 8. Thereby, the power of the crankshaft 15 is transmitted to the intake camshaft 9 and the exhaust camshaft 10 through the timing chain 8.
The intake camshaft 9 is provided on the rear side with respect to the exhaust camshaft 10, and an intake variable valve mechanism 51 is provided at an end portion of the intake camshaft 9. In fig. 2, an electric actuator 52 is mounted on the chain cover 18.
The intake variable valve mechanism 51 is driven by the electric actuator 52, thereby changing the relative rotational phase of the intake camshaft 9 with respect to the crankshaft 15 to the retard side and the advance side, and changing the opening/closing timing of the intake valve 9V to the advance side and the retard side.
An exhaust variable valve mechanism 53 is provided at an end portion of the exhaust camshaft 10, and the exhaust variable valve mechanism 53 includes an advance chamber and a retard chamber, not shown, into which oil is introduced.
When oil is introduced into the advance chamber, the exhaust variable valve mechanism 53 changes the relative rotational phase of the exhaust camshaft 10 with respect to the crankshaft 15 to the advance side, and changes the opening/closing timing of the exhaust valve to the advance side.
When oil is introduced into the retard chamber, the exhaust variable valve mechanism 53 changes the relative rotational phase of the exhaust camshaft 10 with respect to the crankshaft 15 to the retard side, and changes the opening/closing timing of the exhaust valve to the retard side.
The intake camshaft 9 and the exhaust camshaft 10 of the present embodiment constitute the camshaft of the present invention, and the electric actuator 52 constitutes the driving device of the present invention. The intake-side variable valve mechanism 51 constitutes a variable valve mechanism of the present invention.
The oil pan 14 stores oil for lubricating the crankshaft 15, the pistons, and the like, or for operating the exhaust variable valve mechanism 53.
As shown in fig. 3 and 5, the chain cover 18 includes a cover portion 19 and side wall portions 19A and 19B. Cover portion 19 covers the right end portion of engine body 7. Side wall portions 19A, 19B are provided on both sides of cover portion 19 in the width direction, and extend from cover portion 19 toward engine body 7.
In fig. 4 and 5, cover 19 has an opening 19a, and cover 19 around the opening has an annular outer peripheral edge 19b (see fig. 4). The electric actuator 52 is inserted into the opening 19a, and is coupled to the intake variable valve mechanism 51 through the opening 19 a.
The electric actuator 52 is attached to the outer peripheral edge portion 19b in a state of being inserted into the opening portion 19 a. That is, the outer peripheral edge 19b constitutes a mounting surface of the electric actuator 52.
In fig. 4, a plurality of tightening portions 19c, 19d, and 19e are provided around the opening 19 a. The electric actuator 52 is fastened to the fastening portions 19c, 19d, 19e by bolts 20B (see fig. 2), thereby being fastened to the outer peripheral edge portion 19B.
That is, electric actuator 52 is fastened to hood 19 by bolts 20B.
As shown in fig. 3 and 5, the chain cover 18 includes a cover portion 19 and side wall portions 19A and 19B. Cover portion 19 covers the right end portion of engine body 7. Side wall portions 19A, 19B are provided on both sides of cover portion 19 in the width direction, and extend from cover portion 19 to the engine main body 7 side.
The distal ends of the side wall portions 19A, 19B of the chain cover 18 in the extending direction are fastened to the right end portion of the engine main body 7 by bolts 20A. The sidewall 19A of the present embodiment constitutes the 1 st sidewall 19 of the present invention, and the sidewall 19B constitutes the 2 nd sidewall of the present invention.
In fig. 2 and 4, a mounting piece attachment portion 22 is provided on an upper portion of a surface 19f of cover portion 19. In fig. 1, the mount attachment portion 22 bulges out toward the right anti-vibration mounting member 3R from the surface 19f of the cover portion 19, and the arm portion 3B of the right anti-vibration mounting member 3R is attached to the upper surface of the mount attachment portion 22. Here, a front surface 19f of cover portion 19 is a surface on the right vibration-damping mounting member 3R side, and a rear surface 19R of cover portion 19 is a surface on the engine body 7 side.
In fig. 1, the right vibration-proof mounting member 3R has: a mounting member body 3A that houses an elastic body such as rubber, not shown, and is attached to the right side member 2R; and an arm portion 3B extending from the mounting member main body 3A to the mount fitting portion 22, fixed to the mount fitting portion 22 by a bolt 20B.
The engine 5 is elastically supported by the right side member 2R via the right vibration-proof mounting member 3R in a state suspended by the right vibration-proof mounting member 3R.
In fig. 2 and 3, an oil pump section 23 is provided at a lower portion of the chain cover 18. The oil pump section 23 has: a bulging portion 33 (see fig. 1) that bulges out from a surface 19f of cover portion 19 toward right vibration-proof mounting member 3R side; and a pump housing 23A fitted to the back surface 19r of the cover 19 so as to match the bulge portion 33.
The oil pump section 23 includes an oil pump 23B (indicated by a broken line in fig. 4 and 5) housed in the bulging section 33 and the pump housing 23A and rotatable. A suction port and a discharge port, not shown, are formed on the mating surface of the pump housing 23A and the bulging portion 33.
The oil pump 23B includes: an inner rotor, not shown, which is attached to the crankshaft 15 and is rotationally driven by the crankshaft 15; and an outer rotor, not shown, disposed radially outward so as to surround the inner rotor.
The oil pump 23B is, for example, a trochoid oil pump, and internal teeth formed on the outer rotor and external teeth formed on the inner rotor are in contact with each other, whereby a working chamber, not shown, that stores oil is formed between the external teeth and the internal teeth.
In the oil pump 23B, the power of the crankshaft 15 is transmitted to the inner rotor, whereby the inner rotor and the outer rotor rotate in one direction. At this time, the volume of the working chamber is increased and decreased continuously, whereby the oil stored in the oil pan 14 is sucked from the suction port and the sucked oil is discharged from the discharge port.
In fig. 4 and 5, oil passage portions 24 and 25 are integrally formed in the chain cover 18. The oil passage portion 24 is formed in a cylindrical shape so as to bulge out from the front surface 19f of the cover portion 19 toward the right vibration damping mounting member 3R and bulge out from the rear surface 19R of the cover portion 19 toward the engine body 7.
As shown in fig. 5, an oil passage 24a is formed inside the oil passage portion 24, and oil discharged from a discharge port of the oil pump portion 23 is introduced into the oil passage 24 a.
The oil passage portion 24 extends upward from the oil pump portion 23 side, and is coupled to a lower portion of the mount fitting portion 22. The oil passage portion 24 is adjacent to the side wall portion 19B and extends along the side wall portion 19B, being located forward of the oil pump portion 23 in the front-rear direction.
In fig. 5, oil passage 25 is formed in a cylindrical shape bulging from rear surface 19r of cover 19 toward engine body 7. Oil passage portion 25 is connected to an upper end of oil passage portion 24, and extends in the width direction of cover portion 19 from the upper end of oil passage portion 24 toward side wall portions 19A, 19B.
Specifically, the oil passage portion 25 extends in the width direction of the cover portion 19 from a boss portion 30 described later along the attachment fitting portion 22, the front end portion 25f is coupled to the side wall portion 19B via a boss portion 31 for a sensor described later, and the upper end portion 25u is coupled to the lower end portion of the attachment fitting portion 22.
Oil passage portion 25 extends in the width direction of cover portion 19 from boss portion 30 below opening portion 19A, and rear end portion 25r is connected to side wall portion 19A.
That is, oil passage 25 of the present embodiment extends in the width direction of cover 19, and connects side wall 19A and side wall 19B. The tip end portion 25f of the present embodiment constitutes an end portion in the extending direction of the oil passage portion of the present invention.
An oil passage 25a is formed inside the oil passage portion 25, and the oil passage 25a communicates with the oil passage 24 a. Thereby, the oil discharged from the discharge port of the oil pump portion 23 is supplied to the oil passage 25a through the oil passage 24 a. The oil passage portion 25 of the present embodiment constitutes an oil passage portion of the present invention.
A boss portion 30 is provided on a rear surface 19r of cover portion 19. The boss portion 30 protrudes from the cover portion 19 toward the engine body 7 side, and the tip in the protruding direction is joined to the cylinder head 12.
The boss portion 30 is provided with a boss portion 30A for fastening, and the boss portion 30A has a through hole 30A through which the bolt 20C (see fig. 2) is inserted. The bolt 20C is inserted through the through hole 30a and the bolt 20C is fastened to a screw groove, not shown, of the cylinder head 12, whereby the vicinity of the opening 19a of the chain cover 18 is fastened to the cylinder head 12.
The boss portion 30 is provided with a boss portion 30B for oil introduction having an oil introduction oil passage 30B. The oil introduction passage 30b communicates with the oil passage 25a, and the oil flowing through the oil passage 25a is introduced from the oil introduction passage 30b into an oil passage, not shown, formed in the engine main body 7. The oil introduced from the oil introduction oil passage 30b into the oil passage of the engine main body 7 is supplied to the lubrication site of the engine main body 7.
The boss portion 30 is provided with boss portions 30C and 30D for control having outlet oil passages 30C and 30D. The outlet oil passage 30c communicates with the cylinder section 27, and the oil supplied from the oil passage 25a to the cylinder section 27 is supplied from the outlet oil passage 30c to the advance chamber of the exhaust side variable valve mechanism 53.
The outlet oil passage 30d communicates with the cylinder section 27, and the oil supplied from the oil passage 25a to the cylinder section 27 is supplied from the outlet oil passage 30d to the retard chamber of the exhaust side variable valve mechanism 53.
The boss portions 30C and 30D for control are located between the boss portion 30A for fastening and the boss portion 30B for oil introduction in the vertical direction, and are connected to the boss portion 30A for fastening and the boss portion 30B for oil introduction.
The control boss portion 30D projects further toward the side wall portion 19A than the outer edge portion 30r of the fastening boss portion 30A. The through hole 30a and the oil introduction passage 30b are formed in a circular shape, and the outlet passages 30c and 30d are formed to have a larger diameter and to be longer in an oblique direction than the through hole 30a and the oil introduction passage 30 b.
As described above, the boss portion 30 of the present embodiment includes the boss portion 30A for fastening, the boss portion 30B for introducing oil, and the boss portions 30C and 30D for control.
Ribs 41 and 42 are provided on rear surface 19r of cover 19. Rib 41 is provided between opening 19a and mount attachment portion 22 in the width direction of cover 19.
Rib 41 extends in the longitudinal direction (vertical direction) from boss portion 30, and is coupled to upper wall portion 19u of cover portion 19. That is, rib 41 connects boss portion 30A for fastening boss portion 30 and upper wall portion 19u of cover portion 19. The upper wall portion 19u of the present embodiment constitutes the 3 rd side wall portion of the present invention.
The mounting-member fitting portion 22 is joined to the boss portion 30. Thereby, the mount fitting part 22 is coupled to the rib 41 through the boss part 30.
Rib 42 is located below opening 19a and above oil passage portion 25, and extends from boss portion 30 in the width direction of cover portion 19. The front end portion 42f of the rib 42 is joined to the boss portion 30A for fastening, and the rear end portion 42r is joined to the side wall portion 19A. That is, the rib 42 connects the boss portion 30 and the side wall portion 19A. Further, the width direction of cover 19 also includes the lateral direction and a direction inclined with respect to the lateral direction.
Opening 19A is formed in the rear upper portion of cover 19, and is surrounded by boss portion 30, rib 41, upper wall portion 19u, side wall portion 19A, and rib 42. The rib 41 of the present embodiment constitutes the 1 st reinforcing part of the present invention, and the rib 42 constitutes the 2 nd reinforcing part of the present invention.
The outer peripheral edge 19b of the opening 19a is connected to the ribs 41, 42. The fastening portion 19c is coupled to the rib 41, and the fastening portion 19e is coupled to the rib 42.
In the width direction of cover 19, mounting piece attachment portion 22 is located on the opposite side of boss portion 30 from opening 19a, and upper end portion 22u of mounting piece attachment portion 22 is located above cover 19 with respect to lower end portion 19g of opening 19 a. The boss portion 30 is provided to overlap the opening portion 19a in the width direction of the hood portion 19, and is coupled to the mount fitting portion 22.
In fig. 4, a cylinder portion 27 is provided above the cover portion 19. The cylinder portion 27 bulges out from the surface 19f of the cover portion 19 toward the right anti-vibration mounting member 3R opposite to the engine body 7.
The mounting device attachment portion 22 includes: a vertical side wall 22A located on the opening 19a side and extending in the vertical direction; an upper wall 22B extending in the width direction of hood 19; a lower wall 22C located below upper wall 22B and extending in the width direction of hood 19; and a longitudinal side wall 22D located on the side of the side wall portion 19B and extending in the longitudinal direction, the longitudinal side walls 22A, 22D connecting the upper wall 22B and the lower wall 22C.
A space 22s surrounded by the vertical side wall 22A, the upper wall 22B, the lower wall 22C, and the vertical side wall 22D is provided inside the mounting piece attachment portion 22, and a lateral rib 43 is formed in the space 22 s.
The lateral rib 43 extends in the width direction of the cover portion 19, and connects the side wall portion 19B and the boss portion 30. The cross rib 43 of the present embodiment constitutes the 3 rd reinforcing portion of the present invention. Here, the upper end portion of the upper wall 22B is an upper end portion 22u of the attachment fitting 22.
A longitudinal rib 44 is formed in the space 22s, and the longitudinal rib 44 connects the upper wall 22B and the lower wall 22C. The transverse rib 43 is disposed to cross the longitudinal rib 44.
In fig. 6, a part of the vertical side wall 22A is formed by the outer peripheral wall of the boss portion 30 below the lateral rib 43. In other words, a part of the boss portion 30 is constituted by the longitudinal side wall 22A.
In fig. 4, the cylinder portion 27 is provided on the lower side of the mount fitting portion 22, being coupled to the mount fitting portion 22. The rear end portion 27r of the cylinder portion 27 is located below the opening portion 19a, and overlaps with the opening portion 19a in the width direction of the cover portion 19. The front end portion 27f of the present embodiment constitutes one end portion in the extending direction of the cylinder portion of the present invention, and the rear end portion 27r constitutes the other end portion in the extending direction of the cylinder portion of the present invention.
A hydraulic control valve 28 is inserted into the hydraulic cylinder section 27. The hydraulic control valve 28 includes: a not-shown spool inserted into the cylinder portion 27; and a control unit 28A such as an electromagnetic solenoid that projects outward from the cylinder unit 27 and drives the spool.
When the spool is driven by the control portion 28A, the hydraulic control valve 28 supplies the oil supplied to the cylinder portion 27 through the oil passages 24a, 25a to the advance chamber or the retard chamber of the exhaust variable valve mechanism 53 through the outlet oil passage 30c or the outlet oil passage 30 d. That is, the hydraulic control valve 28 switches the supply path of the oil between a path flowing from the cylinder section 27 to the advance chamber and a path flowing from the cylinder section 27 to the retard chamber.
Oil passage portion 25 extends along the direction in which rib 42 extends, that is, the width direction of cover portion 19, and connects boss portion 30B for introducing oil and side wall portion 19A. As shown by broken lines in fig. 4, the cylinder portion 27 extends along the extending direction of the rib 42.
In fig. 5, the front end portion 42f of the rib 42 is coupled to the boss portion 30A for fastening and the boss portion 30D for control. The boss portion 30A for fastening is provided so as to enter between the rib 42 and the oil passage portion 25, and is coupled to the rib 42 and the oil passage portion 25. That is, the upper surface of the control boss portion 30D is connected to the rib 42, and the lower surface of the control boss portion 30D is connected to the oil passage portion 25.
In fig. 2 and 4, a bulging portion 29 is provided on a surface 19f of cover 19. The bulging portion 29 bulges from the surface 19f of the cover portion 19 toward the right vibration isolation mounting member 3R (see fig. 1), and is connected to the lower portion of the cylinder portion 27. The bulging portion 29 extends in the width direction of the chain cover 18, and connects the oil passage portion 24 and the side wall portion 19A.
The chain cover 18 is provided with a boss portion 31 for a sensor. The sensor 32 is fitted to the sensor boss portion 31, and the sensor boss portion 31 supports the sensor 32. The sensor 32 detects a state of the oil flowing in the oil passages 24a, 25a, such as an oil temperature of the oil, a pressure of the oil, or the oil temperature and the pressure of the oil.
As described above, according to the cover structure of the present embodiment, the chain cover 18 has the attachment fitting portion 22, the attachment fitting portion 22 being provided to the cover portion 19 and located on the opposite side of the opening portion 19a in the width direction of the cover portion 19 with respect to the boss portion 30 for fitting the right anti-vibration mounting member 3R provided on the right side member 2R side.
The upper end portion 22u of the mounting piece attachment portion 22 is provided above the cover portion 19 with respect to the lower end portion 19g of the opening portion 19a, and the boss portion 30 is provided so as to overlap the opening portion 19a in the width direction of the cover portion 19 and is coupled to the mounting piece attachment portion 22.
Thus, the high-rigidity mounting piece attachment portion 22 and the high-rigidity boss portion 30 that support the engine body 7 on the right side member 2R are coupled, and the mounting piece attachment portion 22 and the boss portion 30 can be brought close to the opening portion 19 a.
Therefore, the rigidity of the periphery of the opening 19a to which the electric actuator 52 as a heavy object is attached can be increased, vibration of the chain cover 18 due to vibration of the engine body 7 can be suppressed, and the support rigidity of the electric actuator 52 can be increased.
Therefore, vibration of the electric actuator 52 can be suppressed, and the electric actuator 52 can be stably supported by the chain cover 18. As a result, the intake variable valve mechanism 51 can be stably driven by the electric actuator 52, and the reliability of the operation of the intake variable valve mechanism 51 can be improved.
In addition, according to the cover structure of the present embodiment, cover portion 19 is provided with rib 41. Rib 41 is provided between opening 19a and mounting piece attachment portion 22 in the width direction of cover 19, and couples boss portion 30 and lateral rib 43. Also, the mounting-member fitting portion 22 is coupled to the rib 41 through the boss portion 30.
This makes it possible to further increase the rigidity of the periphery of the opening 19a by the high-rigidity rib 41, in addition to the high-rigidity attachment fitting portion 22 and the boss portion 30. Therefore, the vibration of the chain cover 18 due to the vibration of the engine main body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be more effectively improved.
Therefore, the vibration of the electric actuator 52 can be suppressed more effectively, and the electric actuator 52 can be supported more stably by the chain cover 18. As a result, the intake variable valve mechanism 51 can be driven more stably by the electric actuator 52, and the reliability of the operation of the intake variable valve mechanism 51 can be improved more effectively.
In addition, according to the cover structure of the present embodiment, a rib 42 is provided at the cover portion 19. Rib 42 extends from boss portion 30 in the width direction of cover portion 19 below opening 19A, and is connected to side wall portion 19A.
This makes it possible to further increase the rigidity of the periphery of the opening 19a by the high-rigidity rib 42, in addition to the high-rigidity attachment fitting portion 22 and the boss portion 30. Therefore, the vibration of the chain cover 18 due to the vibration of the engine main body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be more effectively improved.
Therefore, the vibration of the electric actuator 52 can be suppressed more effectively, and the electric actuator 52 can be supported more stably by the chain cover 18.
In addition, according to the cover structure of the present embodiment, cover portion 19 around opening portion 19a is provided with outer peripheral edge portion 19b constituting the mounting surface of electric actuator 52, and outer peripheral edge portion 19b is joined to rib 41.
This can reinforce the outer peripheral edge 19b with the high-rigidity rib 41, and can increase the rigidity of the outer peripheral edge 19 b. Therefore, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be further improved.
As a result, the vibration of the electric actuator 52 can be suppressed more effectively, and the electric actuator 52 can be supported by the chain cover 18 more stably.
In addition, according to the cover structure of the present embodiment, since the outer peripheral edge portion 19b is connected to the rib 42, the outer peripheral edge portion 19b can be reinforced by the rib 42 having high rigidity, and the rigidity of the outer peripheral edge portion 19b can be further improved. Therefore, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be further improved.
In addition, according to the cover structure of the present embodiment, the cover portion 19 has a cylinder portion 27, and the cylinder portion 27 bulges out from the cover portion 19 in the direction opposite to the engine main body 7 for inserting a hydraulic control valve 28 for supplying oil to the engine main body 7.
Further, a front end portion 27f of the cylinder portion 27 is joined to the mount fitting portion 22, and a rear end portion 27r of the cylinder portion 27 is located below the opening portion 19a and overlaps with the opening portion 19a in the width direction of the cover portion 19.
By coupling the cylinder section 27 and the attachment fitting section 22 having high rigidity, the chain cover 18 can be reinforced by the cylinder section 27 and the attachment fitting section 22, and the rigidity of the chain cover 18 can be further improved.
Further, the rigidity of cover portion 19 below opening 19a can be increased by cylinder portion 27, and therefore, the rigidity of the periphery of opening 19a can be further increased. As a result, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be further improved.
In addition, according to the cover structure of the present embodiment, the attachment fitting portion 22 bulges in the direction opposite to the engine body 7 from the cover portion 19, and the lateral rib 43 is provided in the space 22s inside the attachment fitting portion 22.
The lateral rib 43 extends in the width direction of the cover portion 19, and connects the side wall portion 19B and the boss portion 30.
This can reinforce the mounting piece attachment portion 22 by the transverse rib 43 having high rigidity, thereby further improving the rigidity of the mounting piece attachment portion 22 and suppressing deformation of the mounting piece attachment portion 22.
Therefore, the rigidity of the periphery of the opening 19a can be further increased by the mounting piece attachment portion 22 and the boss portion 30 having further higher rigidity.
As a result, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be more effectively improved.
In addition, according to the cover structure of the present embodiment, a cylindrical oil passage portion 25 is provided in the cover portion 19, and the oil passage portion 25 has an oil passage 25a for oil to flow.
The oil passage portion 25 extends from the boss portion 30 in the width direction of the cover portion 19 along the mount fitting portion 22, the front end portion 25f is joined to the side wall portion 19B, and the upper end portion is joined to the lower end portion of the mount fitting portion 22.
Thus, the mounting piece attachment portion 22 can be reinforced by the oil passage portion 25 having high rigidity, the rigidity of the mounting piece attachment portion 22 can be further increased, and deformation of the mounting piece attachment portion 22 can be suppressed.
Therefore, the rigidity of the periphery of the opening 19a can be further increased by the mounting piece attachment portion 22 and the boss portion 30 having further higher rigidity. As a result, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be more effectively improved.
In addition, according to the cover structure of the present embodiment, the attachment fitting portion 22 has the longitudinal side wall 22A located on the opening portion 19a side and extending in the longitudinal direction, and a part of the longitudinal side wall 22A is constituted by the outer peripheral wall of the boss portion 30.
This can increase the rigidity of the vertical side wall 22A of the mounting tool attachment portion 22 by the boss portion 30. Therefore, the rigidity of the mounting piece fitting portion 22 can be further increased, and the rigidity of the periphery of the opening portion 19a can be further increased by the mounting piece fitting portion 22 having further high rigidity and the boss portion 30.
As a result, the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and the support rigidity of the electric actuator 52 can be more effectively improved.
Although embodiments of this invention have been disclosed, it will be apparent to those skilled in the art that variations may be applied without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the claims.

Claims (9)

1. A cover structure for an internal combustion engine, comprising: an engine main body having a crankshaft, a camshaft, and a variable valve mechanism that changes a relative rotational phase of the camshaft with respect to the crankshaft; and a cover member attached to an end of the engine main body,
the cover member includes: a cover portion that covers the end portion of the engine main body; a 1 st side wall portion and a 2 nd side wall portion which are provided on both sides in a width direction of the cover portion and are fastened to the end portion of the engine main body; and an opening portion formed in the cover portion for mounting a drive device for driving the variable valve mechanism, wherein the cover structure of the internal combustion engine,
the cover member includes:
a boss portion that extends from the cover portion toward the engine main body and is joined to the engine main body; and a mounting piece mounting portion provided on the cover portion and located on a side opposite to the opening portion with respect to the boss portion in a width direction of the cover portion, for mounting a mounting member provided on a vehicle body side,
the upper end of the mounting member mounting portion is disposed above the cover portion with respect to the lower end of the opening portion,
the boss portion is provided to overlap the opening portion in the width direction of the cover portion, and is coupled to the mounting member attachment portion.
2. The cover structure of an internal combustion engine according to claim 1,
the cover portion has a 3 rd side wall portion provided at a position different from the 1 st side wall portion and the 2 nd side wall portion,
the cover part is provided with a 1 st reinforcing part,
the 1 st reinforcing part is provided between the opening part and the mounting member fitting part in the width direction of the cover part, and connects the boss part and the 3 rd side wall part,
the mounting member fitting portion is coupled to the 1 st reinforcing portion through the boss portion.
3. The cover structure of the internal combustion engine according to claim 2,
the cover part is provided with a 2 nd reinforcing part,
the 2 nd reinforcing portion extends in the width direction of the cover portion from the boss portion below the opening portion and is connected to the 1 st side wall portion.
4. The cover structure of the internal combustion engine according to claim 2,
the cover portion around the opening portion is provided with an outer peripheral edge portion constituting a mounting surface of the driving device,
the outer peripheral edge portion is connected to the 1 st reinforcing portion.
5. The cover structure of the internal combustion engine according to claim 3,
the cover portion around the opening portion is provided with an outer peripheral edge portion constituting a mounting surface of the driving device,
the outer peripheral edge portion is joined to the 2 nd reinforcing portion.
6. The cover structure of the internal combustion engine according to any one of claims 1 to 5,
the cover portion has a cylinder portion that protrudes from the cover portion in a direction opposite to the engine main body and into which a hydraulic control valve for supplying oil to the engine main body is inserted,
one end portion in the extending direction of the cylinder portion is coupled to the mounting member fitting portion,
the other end portion in the extending direction of the cylinder portion is located below the opening portion and overlaps with the opening portion in the width direction of the cover portion.
7. The cover structure of the internal combustion engine according to any one of claims 1 to 5,
the mounting member mounting portion bulges out from the cover portion in a direction opposite to the engine body,
a 3 rd reinforcing part is arranged in the space inside the mounting part assembling part,
the 3 rd reinforcing portion extends in the width direction of the cover portion and connects the 2 nd side wall portion and the boss portion.
8. The cover structure of the internal combustion engine according to any one of claims 1 to 5,
a cylindrical oil passage portion having an oil passage through which oil flows is provided in the cover portion,
the oil passage portion extends from the boss portion in the width direction of the cover portion along the mounting member attachment portion, and has an end portion in the extending direction coupled to the 2 nd side wall portion and an upper end portion coupled to a lower end portion of the mounting member attachment portion.
9. The cover structure of the internal combustion engine according to any one of claims 1 to 5,
the mounting piece fitting portion has a longitudinal side wall located on the opening portion side and extending in the longitudinal direction, and a part of the longitudinal side wall is constituted by an outer peripheral wall of the boss portion.
CN201910650168.XA 2018-07-20 2019-07-18 Cover structure of internal combustion engine Active CN110735731B (en)

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JP2018136870A JP7147316B2 (en) 2018-07-20 2018-07-20 Internal combustion engine cover structure

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CN110735731A (en) 2020-01-31
DE102019210465A1 (en) 2020-01-23
FR3084116B1 (en) 2022-07-01
FR3084116A1 (en) 2020-01-24
JP7147316B2 (en) 2022-10-05
JP2020012454A (en) 2020-01-23

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