CN110735683A - Cover structure of internal combustion engine - Google Patents

Cover structure of internal combustion engine Download PDF

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Publication number
CN110735683A
CN110735683A CN201910650637.8A CN201910650637A CN110735683A CN 110735683 A CN110735683 A CN 110735683A CN 201910650637 A CN201910650637 A CN 201910650637A CN 110735683 A CN110735683 A CN 110735683A
Authority
CN
China
Prior art keywords
cover
boss
side wall
oil
fastening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910650637.8A
Other languages
Chinese (zh)
Other versions
CN110735683B (en
Inventor
小杉裕太郎
和田壮大郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
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Suzuki Motor Corp
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Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Publication of CN110735683A publication Critical patent/CN110735683A/en
Application granted granted Critical
Publication of CN110735683B publication Critical patent/CN110735683B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • 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
    • 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
    • F01L1/352—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 using bevel or epicyclic gear
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • F01L3/205—Reed valves
    • 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
    • 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
    • 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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • 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
    • F01L2810/03—Reducing vibration
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve Device For Special Equipments (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

A cover structure of an internal combustion engine is provided, which can suppress vibration of a cover member due to vibration of the internal combustion engine, and can increase 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) is provided with: a boss section (30) that extends from the cover section (19) toward the engine body (7) and is joined to the engine body (7); a rib (41) that is provided to the cover portion (19), extends in the longitudinal direction from the boss portion (30), and is connected to an upper wall portion (19u) of the cover portion (19); and a rib (42) that is provided on the cover portion (19), extends in the lateral direction from the boss portion (30), and is connected to the side wall portion (19A), wherein the opening portion (19A) is surrounded by the boss portion (30), the rib (41), the upper wall portion (19u), the side wall portion (19A), and the rib (42).

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
As an internal combustion engine mounted on a vehicle, an internal combustion engine including a motor driver including an electric motor that drives a variable air timing device is known (see patent document 1).
In patent document 1, a motor driver includes an electric motor and a case that is attached to an outer surface of a chain case covering an side of an internal combustion engine and contains the electric motor, and is fixed to the chain case by fitting the other end of the case into an opening 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 the internal combustion engine, and can improve support rigidity of a drive device to suppress vibration of the drive device.
Means for solving the problems
A cover structure for an internal combustion engine, comprising an engine body having a crankshaft, a camshaft, and a variable air pressure mechanism for changing a relative rotational phase of the camshaft with respect to the crankshaft, and a cover member attached to an end portion of the engine body, the cover member having a cover portion for covering the end portion of the engine body, a 1 st side wall portion and a 2 nd side wall portion provided on both sides of the cover portion in a width direction and fastened to the end portion of the engine body, and an opening portion formed in the cover portion for mounting a drive device for driving the variable air pressure mechanism, wherein the cover member has a boss portion extending from the cover portion to the engine body and joined to the engine body, a 1 st reinforcing portion provided in the cover portion and extending from the boss portion in a direction different from the width direction of the cover portion and joined to a 3 rd side wall portion of the cover portion, the 3 rd side wall portion provided in a position different from the 1 st side wall portion and the 2 nd side wall portion, and a 2 nd reinforcing portion provided in the cover portion and extending from the boss portion in the width direction, the first side wall portion and the second side wall portion 1 and the second side wall portion and the reinforcing portion, and the second side wall portion, and the reinforcing portion, and the first side wall.
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 internal combustion engine, 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 powertrain equipped with a hood structure for 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 of 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 of embodiment of the present invention, illustrating a timing chain, a variable air mechanism, and a camshaft provided on 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 where an electric actuator is removed.
Fig. 5 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, showing a state in which an electric actuator is removed.
Fig. 6 is a sectional view taken along direction VI-VI of fig. 5.
Description of the reference numerals
The variable displacement engine includes a vehicle 1, an engine 5, an internal combustion engine 7, an engine body 9, an intake camshaft 10, an exhaust camshaft 10, right end portions 11a and 12a (end portions of the engine body), a crankshaft 15, a chain cover 18, a cover portion 19A, a side wall portion 1, a side wall portion 2B, an opening portion 19A, an outer peripheral edge portion 19B, fastening portions 19C, 19D, and 19e, an upper wall portion 3, a bolt 20B, a bolt 20C, an oil passage portion 25a, an oil passage 25a, a cylinder portion 27, a hydraulic cylinder portion 28, a hydraulic control valve 30, a boss portion 30A, a boss portion for fastening 30B, a boss portion for introducing oil 30C, a boss portion 30D (boss portion for control), an outer edge portion 30r, an outer edge portion of the boss portion for control, a variable displacement mechanism 3653, an electric variable displacement mechanism 3653, an exhaust gas variable mechanism 3653, an electric variable valve mechanism 3652, an electric variable displacement mechanism 3651, an electric displacement mechanism 3651, and an electric displacement mechanism 3653.
Detailed Description
A cover structure of an internal combustion engine according to an embodiment of the present invention includes an engine 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 body, the cover member having a cover portion that covers the end portion of the engine body, a 1 st side wall portion and a 2 nd side wall portion that are provided on both sides of the cover portion in a width direction and are fastened to the end portion of the engine body, and an opening portion formed in the cover portion for attaching a drive device that drives the variable valve mechanism, and in the cover structure of the internal combustion engine, the cover member has a boss portion that extends from the cover portion toward the engine body and is joined to the engine body, a 1 st reinforcing portion that is provided in the cover portion and extends from the boss portion in a direction different from the width direction of the cover portion and is joined to a 3 rd side wall portion of the cover portion, the 3 rd side wall portion is provided in a position different from the 1 st side wall portion and the 2 nd reinforcing portion that is provided in the boss portion and extends from the cover portion in the width direction and is joined to the 1 st side wall portion, the opening portion, the 1 st.
This can suppress the cover member from vibrating due to the vibration of the internal combustion engine, 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, and in fig. 1 to 6, regarding the up-down, front-rear, left-right direction, 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.
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 intake ports (not shown), a plurality of intake ports 9V (shown by broken lines in fig. 1) for opening and closing the intake ports, a plurality of exhaust ports (not shown), and a plurality of exhaust ports (not shown) for opening and closing the exhaust ports.
The intake air 9V and the exhaust air are provided in 2 numbers with respect to 1 cylinder, respectively, and the engine 5 of the present embodiment is constituted by, for example, a 4-cylinder engine, and further, the number of cylinders is not limited to 4 cylinders.
An unillustrated air chamber is formed between the cylinder head 12 and the cylinder head cover 13, and an intake camshaft 9 and an exhaust camshaft 10 shown in fig. 3 are housed in the air 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 side variable valve mechanism 51 is provided at the end of the intake camshaft 9, and in fig. 2, an electric actuator 52 is attached to the chain cover 18.
The intake variable valve mechanism 51 is driven by the electric actuator 52, and thereby the relative rotational phase of the intake camshaft 9 with respect to the crankshaft 15 is changed to the retard side and the advance side, and the opening/closing timing of the intake valve 9V is changed to the advance side and the retard side.
An exhaust variable valve mechanism 53 is provided at an end 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 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 to the retard side.
The intake camshaft 9 and the exhaust camshaft 10 of the present embodiment constitute a camshaft of the present invention, the electric actuator 52 constitutes a drive device of the present invention, the intake variable air mechanism 51 constitutes a variable air mechanism and an electric variable air mechanism of the present invention, and the exhaust variable air mechanism 53 constitutes a variable air mechanism and a hydraulic variable air 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-side variable air 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, an opening 19a is formed in cover 19, and an annular outer peripheral edge 19b (see fig. 4) is provided in cover 19 around opening 19 a. electric actuator 52 is inserted into opening 19a and is connected to intake side variable air mechanism 51 through 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. The bolt 20B of the present embodiment constitutes the fastener of the present invention.
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. 3 to 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 includes, for example, a trochoid oil pump, and internal teeth formed in the outer rotor and external teeth formed in 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, and the inner rotor and the outer rotor rotate in directions, and at this time, the volume of the working chamber increases and decreases 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. 5, oil passage portions 24 and 25 are integrally formed at on the chain cover 18, and the oil passage portion 24 is formed in a cylindrical shape bulging from the front surface 19f of the cover portion 19 toward the right vibration damping mounting member 3R side and bulging from the rear surface 19R of the cover portion 19 toward the engine main body 7 side.
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.
Oil passage portion 25 is formed in a cylindrical shape bulging from rear surface 19r of cover portion 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, a front end portion 25f in the extending direction is coupled to the side wall portion 19B via a boss portion 31 for a sensor described later, and an upper end portion 25u is coupled to a 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 a rear end portion 25r in the extending direction 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.
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 fastening boss portion 30A, and the boss portion 30A has a through hole 30A through which a 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 bolt 20C of the present embodiment constitutes the fastening member of the present invention.
The boss portion 30 is provided with an oil introduction boss portion 30B 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 control boss portions 30C, 30d having outlet oil passages 30C, 30d the outlet oil passage 30C communicates with the cylinder portion 27, and the oil supplied from the oil passage 25a to the cylinder portion 27 is supplied from the outlet oil passage 30C to the advance chambers of the exhaust side variable air 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 control boss portions 30C, 30D are located between the fastening boss portion 30A and the oil introduction boss portion 30B in the vertical direction, and are connected to the fastening boss portion 30A and the oil introduction boss portion 30B.
The control boss portion 30D protrudes toward the side wall portion 19A from 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 fastening boss portion 30A, the oil introduction boss portion 30B, and the control boss portions 30C and 30D.
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 of 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 fastening boss portion 30A, 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.
The mount fitting portion 22 is located on the opposite side of the opening portion 19a with respect to the boss portion 30 in the width direction of the cover portion 19, and the upper end portion 22u of the mount fitting portion 22 is provided above the cover portion 19 more than the lower end portion 19g of the opening portion 19 a. 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 mount fitting portion 22.
In fig. 4, a cylinder portion 27 is provided at an upper portion of the cover portion 19, and the cylinder portion 27 bulges out from a surface 19f of the cover portion 19 toward the side opposite to the engine body 7, that is, toward the right vibration damping mounting member 3R.
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.
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. 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 in the extending direction is located below the opening portion 19a, and overlaps the opening portion 19a in the width direction of the cover portion 19.
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 unit 28A, the hydraulic control valve 28 supplies the oil supplied to the cylinder unit 27 through the oil passages 24a, 25a to the advance chamber or the retard chamber of the exhaust side variable air mechanism 53 through the outlet oil passage 30c or the outlet oil passage 30d, that is, the hydraulic control valve 28 switches the supply path of the oil to a path flowing from the cylinder unit 27 to the advance chamber and a path flowing from the cylinder unit 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 oil introduction boss portion 30B 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. 6, the rib 42 is coupled to the oil passage portion 25 through the cylinder portion 27. Specifically, the rib 42 is located above the oil passage portion 25, and is coupled to the cylinder portion 27. The cylinder section 27 is provided at the same height position as the oil passage section 25, and is connected to the oil passage section 25.
In fig. 5, the front end portion 42f of the rib 42 is joined to the fastening boss portion 30A and the control boss portion 30D. The fastening boss portion 30A is provided 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 coupled to the rib 42, and the lower surface of the control boss portion 30D is coupled 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 cover portion 19 that covers the right end portion of the engine main body 7, the side wall portions 19A and 19B that are provided on both sides in the width direction of the cover portion 19 and fastened to the right end portion of the engine main body 7, and the opening portion 19A that is formed in the cover portion 19 and to which the electric actuator 52 that drives the intake side variable air mechanism 51 is fitted.
The chain cover 18 further has: a boss portion 30 that extends from the hood portion 19 toward the engine main body 7 and is joined to the engine main body 7; a rib 41 provided to cover portion 19 and extending in the longitudinal direction from boss portion 30, coupled to upper wall portion 19u of cover portion 19; and a rib 42 provided to cover portion 19, extending from boss portion 30 in the width direction of cover portion 19, and coupled to side wall portion 19A.
The opening 19A is surrounded by the boss portion 30, the rib 41, the upper wall portion 19u, the side wall portion 19A, and the rib 42.
This can increase the rigidity of the periphery of the opening 19A to which the electric actuator 52 is attached, by the boss portion 30, the rib 41, the upper wall portion 19u, the side wall portion 19A, and the rib 42. Therefore, the chain cover 18 can be suppressed from vibrating due to the vibration of the engine main body 7, and the support rigidity of the electric actuator 52 can be improved.
Therefore, vibration of the electric actuator 52 can be suppressed, and the electric actuator 52 can be stably supported by the chain cover 18, and as a result, the intake side variable valve mechanism 51 can be stably driven by the electric actuator 52, and the reliability of the intake side variable valve mechanism 51 during operation can be improved.
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 ribs 41, 42.
Therefore, even when the electric actuator 52, which is a heavy object, is mounted to the opening 19a, 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 increased .
Therefore, the vibration of the electric actuator 52 can be suppressed more effectively, and the electric actuator 52 can be supported more stably at on the chain cover 18. furthermore, the outer peripheral edge portion 19b may be coupled only to the rib 41 or only to the rib 42.
In addition, according to the cover structure of the present embodiment, cover portion 19 around opening portion 19a is provided with fastening portions 19c, 19d, 19e that fasten electric actuator 52 to cover portion 19 by bolts 20B, fastening portion 19c is joined to rib 41, and fastening portion 19e is joined to rib 42.
This can reinforce the fastening portions 19c and 19e for fastening the electric actuator 52 to the opening 19a with the ribs 41 and 42, and can improve the rigidity of the fastening portions 19c and 19 e.
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 further increased .
As a result, the vibration of the electric actuator 52 can be suppressed more effectively, and the electric actuator 52 can be supported further stably on the chain cover 18.
In addition, any of the fastening portions 19c, 19d, 19e may be coupled to only the rib 41, or may be coupled to only the rib 42, and in addition, any or more of the fastening portions 19c, 19d, 19e may be fastened to the rib 41 or the rib 42.
In addition, any of the fastening portions 19c, 19d, and 19e may be coupled to the rib 41 and the rib 42, and in this case, any of the fastening portions 19c, 19d, and 19e may be provided at the coupling portion that couples the rib 41 and the rib 42.
Further, according to the cover structure of the present embodiment, cover portion 19 includes: an oil passage portion 25 extending in a direction in which the rib 42 extends, and having an oil passage 25 a; and a cylinder portion 27 that bulges out from the cover portion 19 in a direction opposite to the engine main body 7 and into which a hydraulic control valve 28 for supplying oil to the engine main body 7 is inserted.
The boss portion 30 includes an oil introduction boss portion 30B configured to introduce oil flowing through the oil passage 25a into the engine main body 7. The oil passage portion 25 connects the oil introduction boss portion 30B and the side wall portion 19A.
The cylinder section 27 extends along the extending direction of the rib 42, and the rib 42 is connected to the oil passage 25a through the cylinder section 27.
Thus, the ribs 41 and 42 for reinforcing the opening 19a to which the electric actuator 52 is attached can be reinforced by the oil introduction boss portion 30B, the cylinder portion 27, and the oil passage portion 25, and the rigidity of the ribs 41 and 42 can be further increased .
Therefore, the rigidity of the periphery of the opening 19a to which the electric actuator 52 is attached can be further increased and by the ribs 41 and 42 having higher rigidity, and the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and as a result, the support rigidity of the electric actuator 52 can be further increased , and the electric actuator 52 can be further stably supported by the chain cover 18.
In addition, according to the cover structure of the present embodiment, the boss part 30 is configured to include a fastening boss part 30A for fitting the bolt 20C that fastens the chain cover 18 to the engine main body 7, and control boss parts 30C, 30D that supply the oil controlled by the hydraulic control valve 28 to the hydraulic exhaust side variable air mechanism 53.
The control boss portions 30C, 30D are located between the fastening boss portion 30A and the oil introduction boss portion 30B in the vertical direction, and are connected to the fastening boss portion 30A and the oil introduction boss portion 30B. The control boss portion 30D protrudes toward the side wall portion 19A side from the outer edge portion 30r of the fastening boss portion 30A.
Thus, by providing the boss portion 30 with the fastening boss portion 30A, the oil introduction boss portion 30B, and the console portions 30C, 30D, the rigidity of the boss portion 30 can be improved, and by enlarging the console portion 30D in the width direction (front-rear direction) of the cover portion 19, the rigidity of the boss portion 30 can be further improved .
Further, in addition to the rib 41 being coupled to the fastening boss portion 30A, the leading end portion 42f in the extending direction of the rib 42 is also coupled to the fastening boss portion 30A and the console boss portion 30D, and therefore, the ribs 41, 42 can be reinforced by the boss portion 30 having high rigidity.
Therefore, the rigidity of the periphery of the opening 19a to which the electric actuator 52 is attached can be further increased and by the ribs 41 and 42 having higher rigidity, and the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and as a result, the support rigidity of the electric actuator 52 can be further increased , and the electric actuator 52 can be further stably supported by the chain cover 18.
Further, the control boss portions 30C, 30D are located between the fastening boss portion 30A and the oil introduction boss portion 30B in the vertical direction and are connected to the fastening boss portion 30A and the oil introduction boss portion 30B, and therefore the rib 42 can be connected to a wide range of the boss portion 30, and therefore the rigidity of the rib 42 can be further increased , and the rigidity of the cover portion 19 around the opening portion 19a can be further effectively increased.
In addition, according to the cover structure of the present embodiment, the boss portions 30C, 30D for control are provided between the rib 42 and the oil passage 25a, and are coupled to the rib 42 and the oil passage 25 a.
Thus, by connecting the control boss portion 30D to the oil passage portion 25 having high rigidity, the rigidity of the control boss portion 30D can be further increased steps, and by connecting the rib 42 to the control boss portion 30D having further higher rigidity steps, the rigidity of the rib 42 can be further increased steps.
Therefore, the rigidity of the periphery of the opening 19a to which the electric actuator 52 is attached can be further increased and by the ribs 41 and 42 having higher rigidity, and the vibration of the chain cover 18 due to the vibration of the engine body 7 can be more effectively suppressed, and as a result, the support rigidity of the electric actuator 52 can be further increased , and the electric actuator 52 can be further stably supported by the chain cover 18.
The cover member of the present embodiment is formed of the chain cover 18, but is not limited to the chain cover 18 as long as it covers the end of the engine main body 7.
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 (6)

  1. A cover structure for an internal combustion engine of the type , comprising an engine body having a crankshaft, a camshaft, and a variable air mechanism for changing a relative rotational phase of the camshaft with respect to the crankshaft, and a cover member attached to an end portion of the engine body,
    the cover member has 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 that are provided on both sides of the cover portion in the width direction and are fastened to the end portion of the engine main body, and an opening portion that is formed in the cover portion and to which a drive device that drives the variable air mechanism is attached, and is characterized in that 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; a 1 st reinforcing portion provided in the cover portion, extending from the boss portion in a direction different from the width direction of the cover portion, and connected to a 3 rd side wall portion of the cover portion, the 3 rd side wall portion being provided at a position different from the 1 st side wall portion and the 2 nd side wall portion; and a 2 nd reinforcing portion provided in the cover portion and extending from the boss portion in a width direction of the cover portion, and connected to the 1 st side wall portion,
    the opening is surrounded by the boss portion, the 1 st reinforcing portion, the 3 rd side wall portion, the 1 st side wall portion, and the 2 nd reinforcing portion.
  2. 2. The cover structure of an internal combustion engine according to claim 1,
    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 at least sides of the 1 st reinforcing portion and the 2 nd reinforcing portion.
  3. 3. The cover structure of the internal combustion engine according to claim 1 or claim 2,
    a fastening portion for fastening the driving device to the cover portion by a fastening member is provided in the cover portion around the opening portion,
    the fastening portion is coupled to at least sides of the 1 st reinforcing portion and the 2 nd reinforcing portion.
  4. 4. The cover structure of the internal combustion engine according to any of claim 1 to claim 3,
    the cover portion includes: a cylindrical oil passage portion extending in a direction in which the 2 nd reinforcing portion extends, the cylindrical oil passage portion having an oil passage; and 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,
    the boss portion includes an oil introduction boss portion for introducing oil flowing in the oil passage into the engine main body,
    the oil passage portion connects the oil introduction boss portion and the 1 st side wall portion,
    the cylinder portion extends in a direction in which the 2 nd reinforcing portion extends,
    the 2 nd reinforcing portion is connected to the oil passage portion through the cylinder portion.
  5. 5. The cover structure of the internal combustion engine according to claim 4,
    the variable air mechanism includes an electric variable air mechanism driven by the drive device, and a hydraulic variable air mechanism driven by oil,
    the boss portion includes a fastening boss portion to which a fastening member for fastening the cover member to the engine main body is fitted, and a control boss portion that supplies oil controlled by the hydraulic control valve to the hydraulic variable air mechanism,
    the control boss portion is located between the fastening boss portion and the oil introduction boss portion, and is connected to the fastening boss portion and the oil introduction boss portion,
    the control boss portion projects further toward the 1 st side wall portion than an outer edge portion of the fastening boss portion,
    the 2 nd reinforcing portion has an end portion in the extending direction connected to the fastening boss portion and the control boss portion.
  6. 6. The cover structure of an internal combustion engine according to claim 5,
    the control boss portion is provided between the 2 nd reinforcing portion and the oil passage portion, and is connected to the 2 nd reinforcing portion and the oil passage portion.
CN201910650637.8A 2018-07-20 2019-07-18 Cover structure of internal combustion engine Active CN110735683B (en)

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WO2023238176A1 (en) * 2022-06-06 2023-12-14 日産自動車株式会社 Mounting bracket

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JP7135533B2 (en) 2022-09-13
FR3084107A1 (en) 2020-01-24
FR3084107B1 (en) 2023-05-26
DE102019210464A1 (en) 2020-01-23
JP2020012453A (en) 2020-01-23
CN110735683B (en) 2022-07-05

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