CN105927410A - Cylinder End Construction - Google Patents
Cylinder End Construction Download PDFInfo
- Publication number
- CN105927410A CN105927410A CN201610109064.4A CN201610109064A CN105927410A CN 105927410 A CN105927410 A CN 105927410A CN 201610109064 A CN201610109064 A CN 201610109064A CN 105927410 A CN105927410 A CN 105927410A
- Authority
- CN
- China
- Prior art keywords
- shunt paths
- cylinder head
- lubricating oil
- air inlet
- cylinder
- 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.)
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Classifications
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- 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
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
-
- 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
- F01M2001/062—Crankshaft with passageways
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
A cylinder end construction provided by the present invention is for an internal combustion engine possessing a transferring part for transferring power from a crankshaft to a valve mechanism. The cylinder end comprises a valve chamber (11) for accommodating the above valve mechanism; lubricating oil paths (8, 18) for dropping off the lubricating oil of the valve chamber (11); first shunting paths (16A, 16B)used for circulating the air intake downwards of the Channeling cylinder mixed gas scavenging. Under a carrying state carried on a vehicle, an air intake entrance (16a) of the first shunting paths (16A, 16B) which is opened at the bottom (11b) of the valve chamber (11) is configured to be higher than a lubricating oil entrance (27, 18a) of the lubricating oil paths (8, 18) which is opened at the bottom (11b).
Description
Technical field
The present invention relates to the cylinder head structure with the internal combustion engine of the transferring element from crank axial valve mechanism transmission power,
Configuring technical particularly to the shunt paths for the blow-by gas in crankcase being carried out scavenging.
Background technology
The top of the cylinder head of internal combustion engine is provided with cavaera.Valve mechanism it is accommodated with in cavaera.Valve mechanism by
Engine motor oil (hreinafter referred to as lubricating oil) lubricates.But, in recent years, following multicylinder engine is developed: in cylinder head
Portion, is formed with the set air vent (aerofluxus collection portion) making the aerofluxus set from multiple combustor, and at the exhaust side of cylinder head
Sidewall connects single exhaustor.In the case of being so formed with set air vent in cylinder head, connect with by exhaust manifold
The conventional structure of the sidewall being connected on cylinder head compares, and has and can make electromotor integral miniaturization, thermal discharge quilt because of aerofluxus
Suppress and catalyst can be made to do sth. in advance the advantages such as activation.
Have such set air vent cylinder head construct in the case of, need by be used for the lubricating oil making cavaera to
The path (hereinafter referred to as lubricating oil path) that oil sump returns is formed at the position will not interfered with set air vent, therefore, carries
Go out various technology.
Such as, in patent documentation 1, disclose following cylinder head structure: so that do not interfere with set air vent, will profit
Lubricating oil path is formed at the wall portion that will separate between combustor adjacent for set air vent.
In this configuration, by by lubricating oil path with the aerofluxus collection portion bag being carried out gathering by a pair air vent and aerofluxus
The mode enclosed is formed, thus the early warming of the lubricating oil of flowing is possibly realized in lubricating oil path.
Prior art literature
Patent documentation
Patent documentation 1: No. 3605521 publication of patent
Summary of the invention
The present invention is intended to solve the technical problem that
But, within the engine, although a part for the aerofluxus after burning Indoor Combustion seldom still can be as altering cylinder
Gaseous mixture from the clearance leakage between cylinder wall and piston to crankcase side.Therefore, a part for air inlet is used will to alter cylinder mixing
Gas scavenging also makes it be back to gas handling system, makes blow-by gas burn in combustor again.Therefore, on cylinder head, except setting
It is equipped with lubricating oil path, is additionally provided with the path (hereinafter referred to as shunt paths) of air inlet by blow-by gas scavenging.
Different from the position relationship of shunt paths according to lubricating oil path, it is possible to the lubrication of lubricant passage way footpath flowing
Oil is flowed into shunt paths and flows into and make shunt paths close.Once shunt paths is closed by lubricating oil, can hinder shunt paths
In the circulation of air inlet, as a result of which it is, the scavenging of blow-by gas is insufficient.
Particularly in the case of the cylinder head structure of the set air vent having described in patent documentation 1, shunt paths is also
Need also exist for being formed at the position will not interfered with set air vent, therefore, by shunt paths and lubricating oil with lubricating oil path
The situation that path closely configures is more.When shunt paths is closely configured with lubricating oil path, to lubricant passage way runoff
The probability that dynamic lubricating oil is flowed in shunt paths uprises further.
Additionally, in patent documentation 1, describe as lubricating oil path, also comprise blow-by gas path, but, should
Path is the path that blow-by gas flows through, and the shunt paths that the air inlet from blow-by gas scavenging is flow through is different.
The present invention invents in view of problem as described above, and one purpose is to provide a kind of cylinder head structure, anti-
Only lubricating oil is flowed into shunt paths and closes shunt paths, enabling stably carry out the scavenging of blow-by gas.Additionally,
It is not limited to this purpose, as other objects of the present invention, also comprises shown in the acquisition embodiment for carrying out an invention described later
Respectively constitute the action effect brought and be to utilize the most getable action effect of conventional technology.
Technical teaching for solving the problem was
(1) cylinder head structure disclosed herein is the internal combustion with the transferring element from crank axial valve mechanism transmission power
The cylinder head structure of machine, including: cavaera, it receives described valve mechanism；Lubricating oil path, it is for making the profit of described cavaera
Lubricating oil falls；And the 1st shunt paths, it is used for: is used in and the air inlet of blow-by gas scavenging is circulated downwards, described
The air inlet of described 1st shunt paths of the bottom opening of cavaera is configured to: under the lift-launch state being equipped on vehicle,
It is in the position higher than the lubricating oil inlet in the described lubricating oil path at described bottom opening.
(2) what preferably, the described air inlet of described 1st shunt paths was possessed in the bottom of described cavaera is prominent
The upper opening in shape portion.
(3) preferably, possessing inclined plane in the bottom of cavaera, described lubricating oil inlet is configured at described inclined plane,
Described air inlet is configured at described inclined plane in the position higher than described lubricating oil inlet.
(4) preferably, on the cylinder body of downside being assemblied in described cylinder head, it is formed with described 1st shunt paths even
The 2nd logical shunt paths, the flow path cross sectional area of described 1st shunt paths is set and cuts than the stream of described 2nd shunt paths
Area is little.
(5) preferably, include the aerofluxus set of the multiple air vent set being connected with multiple cylinders at described cylinder head
Portion and will between described air vent separate partition wall in the case of, described 1st shunt paths is formed at described partition wall.
Invention effect
Construct according to disclosed cylinder head, under the lift-launch state being equipped on vehicle, the air inlet configuration of the 1st shunt paths
The position high in the lubricating oil inlet than lubricating oil path, therefore, lubricating oil preferentially enters to lubricating oil compared with air inlet
Mouth flowing.
Therefore, it is possible to suppression lubricating oil enters from air inlet and closes shunt paths, it is possible to stably carry out altering cylinder and mix
Close the scavenging of gas.
Accompanying drawing explanation
Fig. 1 be an embodiment cylinder head structure the longitudinal section along bank of cylinder direction (A-A of Fig. 3 is to regarding section view
Figure).
Fig. 2 is the front view (the C direction direction view of Fig. 1 and Fig. 3) in the wall portion of the front side of the cylinder head structure of an embodiment.
Fig. 3 is air inlet and sectional elevation (Fig. 1 and Fig. 2 of set air outlet portion of the cylinder head structure of an embodiment
B-B to regarding sectional view).
Fig. 4 is the schematic axonometric chart shown in the electromotor segmentation constructed by the cylinder head employing an embodiment.
Fig. 5 is the schematic diagram of the composition of the return-flow system of the blow-by gas illustrating an embodiment.
Description of reference numerals
1 electromotor
2 cylinder bodies
2a crankcase
7 lubricating oil paths
8 receiving rooms (front lubricating oil path)
9 valve mechanisms
10 cylinder heads
11 cavaeras
The bottom of 11b cavaera 11
11sf leans forward inclined-plane
11sr hypsokinesis inclined-plane
16,16A, 16C, 16D, 16E the 1st shunt paths
The air inlet of 16a shunt paths 16
16b protruding part
17 the 2nd shunt paths
Oilhole (rear lubricating oil path) after 18
The lubricating oil inlet in lubricating oil path 18 after 18a
20A, 20B, 20C partition wall
23 set air vents
23a air vent
23b aerofluxus collection portion
27, the lubricating oil inlet in lubricating oil path 8 before 28
Detailed description of the invention
Hereinafter, referring to the drawings, embodiments of the present invention are described.Additionally, embodiment shown below is the most only
Being to illustrate, the application of the various deformation do not expressed at following embodiment, technology is got rid of by intention useless.Following embodiment party
Respectively being configured to of formula is being implemented without departing from carrying out various deformation in the range of their purport, further, it is possible to as required
Carry out accepting or rejecting and select, or can be appropriately combined.
[1. structure]
[1-1. unitary construction]
Cylinder head about present embodiment constructs, and uses Fig. 1～Fig. 5 to illustrate.The cylinder head 10 of present embodiment is by aluminum
Alloy Forming, and link the top of the cylinder body 2 being fixed on the electromotor 1 (internal combustion engine) shown in Fig. 4.Fig. 4 is to illustrate that assembling is started
The exploded perspective view of the state before machine 1.In the following description, using the side that cylinder head 10 fixed to cylinder body 2 as under
Side, using its opposition side as top.The lower surface of cylinder head 10 and the upper surface of cylinder body 2 are all formed plane, they
Under the state that composition surface clamps the pad for guaranteeing sealing, cylinder head 10 and cylinder body 2 are combined.
Upper surface at cylinder head 10 is provided with cylinder head cover 50, and the lower surface at cylinder body 2 is provided with oil sump 60.It addition,
The front side (lower left in Fig. 4) of electromotor 1 is provided with the transferring element 5 (song of the subsidiary engine class of electromotor 1, power transmission
Axle sprocket wheel, timing sprocket and timing chain etc., or crankshaft pulley, timing belt pulley, Timing Belt etc.).At cylinder head 10 and cylinder
The installed in front of body 2 has chain guard 6.Space between this chain guard 6 and cylinder head 10 and cylinder body 2 is (hereinafter also referred to as receiving room
8) transferring element 5 it is accommodated with.Additionally, be provided with driving dish, flywheel at the rear side (upper right in Fig. 4) of electromotor 1, and with
The various devices (such as, variator, electric rotating machine etc.) in the downstream of PWTN connect.
This electromotor 1 is water-cooled many cylinder gasoline engines.In the inside of electromotor 1, structure arow be configured with in
Multiple cylinder-bore 3 (cylinder, hereinafter referred to as cylinder 3) of hollow cylinder shape perforation.Electromotor 1 shown in Fig. 4 is to have configuration in upright arrangement
The electromotor 1 of four cylinders of four cylinders 3.For the sequence number of cylinder 3, from the front of electromotor 1 successively as the first cylinder
(#1), the second cylinder (#2), the 3rd cylinder (#3), the 4th cylinder (#4).The lower end of the piston slided in each cylinder 3 is via even
Extension bar is connected with bent axle 4 (crank axle).Hereinafter, the direction (row set direction) arranged in column-shaped by cylinder 3 is referred to as bank of cylinder direction
L。
Cavaera 11 (with reference to Fig. 1) is possessed on the top of cylinder head 10.Above cylinder head 10, to cover this cavaera 11
Mode is provided with cylinder head cover 50.The valve mechanism 9 that inlet valve and exhaust valve are driven it is accommodated with in the inside of cavaera 11.
Fig. 3 is air inlet 13 and the sectional elevation (B-of following Fig. 1 and Fig. 2 of set air vent 23 part of cylinder head 10
B is to regarding sectional view).Additionally, in figure 3, cylinder 3 is illustrated with double dot dash line.Lower surface 10 at cylinder head 10BO(with reference to Fig. 1), edge
Bank of cylinder direction L and be formed with the combustor 19 of four ridge-roof type in the position opposed with the end face of piston (with reference to Fig. 1 and figure
5).As it is shown on figure 3, be formed with two inlet valve ports 12 on (air inlet side) inclined-plane for the triangle roof shape of combustor 19,
Another (exhaust side) inclined-plane is formed with two exhaust valve ports 21.Being provided with air inlet 13 on cylinder head 10, it is from two air inlets
Aperture of door 12 is to air inlet side sidewall 10INIt is bent to form；And air vent 23a, its from each exhaust valve port 21 to exhaust side sidewall 10EX
It is bent to form.
Air inlet 13 is each provided with under one, vertical view being formed Y shape for a cylinder 3.Air inlet 13 does not has phase
Set mutually, but independently at air inlet side sidewall 10INUpper shed.That is, cylinder head 10 is formed with four air inlets 13, in air inlet
Side sidewall 10INOn be provided with four each openings (air inlet).
On the other hand, air vent 23a is each provided with one for an exhaust valve port 21.8 air vent 23a are at cylinder head 10
Inside be set as one.This Set-dissection is referred to as aerofluxus collection portion 23b.Row set direction at multiple air vent 23a
Central authorities' (that is, exhaust side sidewall 10EXThe central authorities of bank of cylinder direction L), be provided with for the exhaust stream by the set of aerofluxus collection portion 23b
The opening (hereinafter referred to as air vent) 24 gone out.8 air vent 23a and aerofluxus collection portion 23b are the inside shapes at cylinder head 10
The hollow bulb become, is defined set air vent 23 by them.
In the inside of cylinder head 10, in order to suppress to cause combustor 19 because of exhaust heat, gather the overheated of air vent 23, formed
There is the water jacket 30 making cooling current logical.Water jacket 30 is arranged on air inlet 13 and the periphery of air vent 23a, gathers the upper of air vent 23
Side and lower section.Water jacket 30 makes cooling water circulate at bank of cylinder direction L from the front side of cylinder head 10 to rear side.
As shown in Figures 3 and 4, exhaust side sidewall 10EXPart tool in aerofluxus collection portion 23b closing on set air vent 23
There is the bellying 25 of the arcuation that shape in curved surface is formed protrudingly outside mediad.In the central authorities of the bank of cylinder direction L of bellying 25,
It is provided with the flange part 26 formed around air vent 24.Flange part 26 is connected with not shown exhaustor.
As it is shown on figure 3, on cylinder head 10, it is centrally formed boss portion 14b at each cylinder 3, has been formed in this boss portion 14b
Having spark plug to insert hole 14h, this spark plug inserts hole 14h for making not shown spark plug insert and making it towards combustor.
It addition, on cylinder head 10, formed respectively with the outside of cylinder 3 at two ends between air inlet side and the adjacent cylinder 3 of exhaust side
Having multiple binder bolt hole 15, this binder bolt hole 15 (saves sketch map for the binder bolt for cylinder head 10 is incorporated into cylinder body 2
Show) insert.
Additionally, by the binder bolt hole 15 being positioned at the most forward side in multiple binder bolt holes 15, particularly exhaust side
Binder bolt hole 15f before being referred to as, binder bolt hole 15r after the binder bolt hole 15 being positioned at side the most rearward of exhaust side is referred to as.
It addition, shown in Fig. 3, on cylinder head 10, be formed with multiple 1st shunt paths at exhaust side and (below, be also called for short
For shunt paths) 16A, 16C, and, it is formed with multiple 1st shunt paths (following, also referred to as shunt paths) in air inlet side
16D、16E.In the case of not distinguishing these shunt paths 16A, 16C, 16D, 16E, below, shunt paths 16 it is designated as.Rear
Describe shunt paths 16 in detail.
[1-2. lubricating oil discharges structure]
It follows that the structure that the lubricating oil (lubricating oil of cavaera 11) accumulated in cavaera 11 is discharged by explanation.Fig. 1
Be the A-A of Fig. 3 to regarding sectional view, Fig. 2 is the front wall portion 10 of cylinder head 10FRFront view (the C direction direction view of Fig. 1 and Fig. 3).
As shown in FIG. 1 to 3, on cylinder head 10, it is each provided with one in front side and rear side for cavaera will be accumulated in
The oilhole 7,18 that the lubricating oil of 11 is discharged.
Front side oilhole 7 (hereinafter also referred to as front oilhole 7) be arranged on than the most forward side air vent 23a more
The position of forward side (outside), is formed the front wall portion 10 at the bank of cylinder direction through cylinder head of L 10FR.Front oilhole 7 is set
It is set to the hole portion 27 of exhaust side and the hole portion 28 of air inlet side, from the two hole portion 27,28 removal of lubricant.
Lower surface portion 28b in the hole portion 28 of air inlet side is arranged to more go to outside (air inlet side) and more incline below Fig. 2
Tiltedly.This is because, owing to electromotor 1 is equipped on vehicle with being slightly slanted in the way of exhaust side is below than air inlet side, institute
When carrying, to make the lower surface portion 28b level in the hole portion 28 of air inlet side.
Utilize such composition, accumulate in the lubricating oil in cavaera 11 in the front side of cylinder head 10 from the hole portion 27 of exhaust side
And the hole portion 28 of air inlet side discharges, at the front wall portion 10 of cylinder head 10FROutside pass through and drop to be combined in the lower section of cylinder body 2
Oil sump 60 (with reference to Fig. 4).In other words, the lubricating oil in cavaera 11 is accumulated in by chain guard 6 and cylinder head 10 and cylinder body 2
Between space i.e. receiving room 8, drop to oil sump 60.
That is, utilize receiving room 8 to constitute the lubricating oil path of the present invention, utilize hole portion 27,28 to constitute the lubricating oil of the present invention
Entrance (following, by receiving room 8 also referred to as lubricating oil path 8 or front lubricating oil path 8, hole portion 27,28 also referred to as lubricating oil is entered
Mouth 27,28).
Additionally, in this cylinder head 10, as it is shown in figure 1, the front side of the bottom 11b at cavaera 11, be provided with towards hole portion
27,28 and decline inclined plane 11sf (hereinafter also referred to as the inclined-plane 11sf that leans forward) of inclination.The inclined-plane 11sf that leans forward is with from the second gas
The face that mode the lowest for bottom 11b on front side of more going between cylinder and the 3rd cylinder is formed obliquely, thus, the profit of cavaera 11
Lubricating oil is guided to hole portion 27,28.
It follows that the lubricating oil on rear side of Shuo Ming discharges structure.The oilhole 18 of rear side is (hereinafter also referred to as rear lubricating oil
Hole 18) it is arranged on the position of air vent 23a more posteriorly side (outside) than side the most rearward, it is formed the cavaera of cylinder head 10
The bottom 11b of 11 is through at above-below direction.
When cylinder head 10 is incorporated into cylinder body 2, rear oilhole 18 and the not shown lubricating oil being formed at cylinder body 2
Path connects.The lubricating oil accumulated in cavaera 11 is discharged from rear oilhole 18, by cylinder body 2 at the rear side of cylinder head 10
Lubricating oil path and drop to oil sump 60.
Further, on this cylinder head 10, as it is shown in figure 1, the rear side of the bottom 11b at cavaera 11, it is provided with towards Hou Run
Lubrication hole 18 and decline inclined plane 11sr (hereinafter also referred to as hypsokinesis inclined-plane 11sr) of inclination.Hypsokinesis inclined-plane 11sr is with from
The face that mode the lowest for bottom 11b on rear side of more going between two cylinders and the 3rd cylinder is formed obliquely, thus, cavaera 11
Lubricating oil be guided to rear oilhole 18.
That is, after utilization, oilhole 18 constitutes the lubricating oil path of invention (below, by rear oilhole 18 also referred to as profit
Lubricating oil path 18 or rear lubricating oil path 18, be also referred to as lubricating oil inlet 18a by peristome 18a), wherein, rear oilhole 18
Using the peristome 18a at hypsokinesis inclined-plane 11sr opening as entrance.
[recirculation structure of 1-3. blow-by gas]
Use Fig. 5 illustrates the composition of the return-flow system of the blow-by gas of present embodiment.
On the top of cylinder head cover 50, possess PCV (positive crankcase ventilation (PCV)) room 51 and breather chamber 52.In PCV room 51 and logical
The inside of air chamber 52 is respectively arranged with lubricating oil baffle plate 51c, the 52c preventing lubricating oil from flowing out to outside.
It is extended with breather 52a from breather chamber 52.The end of breather 52a is leaning on the position of upstream side than choke valve 13b
It is connected with air inlet pipe 13a.
It addition, be vertically equipped with multiple 1st shunt paths 16 on cylinder head 10.On cylinder body 2, be vertically equipped with
The 2nd shunt paths (following, also referred to as shunt paths) 17 that 1st shunt paths 16 is respectively communicated with.Utilize shunt paths 16,
17, make the inner space of cylinder head cover 50 connect with the inner space of the crankcase 2a of the bottom constituting cylinder body 2.
Shunt paths 16 aperture compared with shunt paths 17 is set less.That is, the flow path cross sectional area of shunt paths 16
The flow path cross sectional area of (cross section vertical with the circulating direction of air inlet of circulation in shunt paths 16) and shunt paths 17 (with
The cross section that in shunt paths 17, the circulating direction of air inlet of circulation is vertical) compare and be set less.
It addition, the inner space of the inner space of crankcase 2a and cylinder head cover 50 is via chain guard 6 and cylinder head 10 and cylinder body 2
Between space i.e. receiving room 8 (with reference to Fig. 1) and connect connection.
And, PCV room 51 is provided with Pcv valve 51a, is extended with Pcv valve 51b from Pcv valve 51a, this Pcv valve 51b
End is connected with inlet manifold 13c.Additionally, Pcv valve 51a plays as the flow control valve that can regulate flow according to pressure
Function.
When fuel burns in combustor 19, piston 19a moves back and forth in cylinder, a part for aerofluxus is from cylinder
Flow out in crankcase 2a as blow-by gas with the gap of piston 19a, but, utilize the work of piston 19a, such as arrow
Shown in A1, A2, A3, via breather chamber 52 and shunt paths 16,17, new gas (air inlet) is attracted to crankcase 2a from breather 52a
In.And, utilize this new gas, as shown in arrow G1, G2, G3, by blow-by gas scavenging in crankcase 2a, via receiving room
8, PCV room 51, Pcv valve 51a and Pcv valve 51b are supplied in inlet manifold 13c.And, make this blow-by gas at combustor 19
In burn again together with new gas.Now, Pcv valve 51a is utilized to regulate the capacity of returns of blow-by gas according to pressure.
Additionally, as it has been described above, the flow path cross sectional area of shunt paths 16 is set compared with the flow path cross sectional area of shunt paths 17
Littlely fixed.Therefore, for from shunt paths 16 to the flowing of shunt paths 17, stream expands, on the other hand, on the contrary,
For from shunt paths 17 to the flowing of shunt paths 16, stream reduces.
Therefore, for from shunt paths 16 to the flowing of shunt paths 17, i.e. air inlet from cylinder head 10 to the stream of crankcase 2a
For Dong, the pressure loss is less, easily produces the flowing of such air inlet.On the other hand, for from shunt paths 17 to shunting
The flowing in path 16, i.e. blow-by gas from crankcase 2a to the flowing of cylinder head 10 for, the pressure loss is bigger, it is difficult to produce this
The flowing of the blow-by gas of sample.
Therefore, as it has been described above, air inlet is flowed to crankcase 2a by shunt paths 16,17 from cylinder head 10, blow-by gas
Flowed to cylinder head 10 by receiving room 8 from crankcase 2a.
[composition of 1-4. shunt paths]
Reuse the composition that Fig. 1～Fig. 3 illustrates the shunt paths of present embodiment.
Shunt paths 16A of exhaust side, 16C because of restriction spatially compared with shunt paths 16D of air inlet side, 16E
Have to be set to path.Therefore, shunt paths 16A, 16C once have lubricating oil to enter to be easy for by this lubrication oil seal
Close.
Additionally, electromotor 1 is equipped on vehicle with being slightly slanted in the way of exhaust side is below compared with air inlet side, because of
This, lubricating oil is prone to accumulate in exhaust side, is easily accessible shunt paths 16A, 16C.
Therefore, in the present embodiment, it is made that following improvement so that lubricating oil will not enter the shunting road of exhaust side
Footpath 16A, 16C.
Hereinafter, shunt paths 16A, 16C are described in detail.
In the present embodiment, as it is shown on figure 3, shunt paths 16A, 16C are arranged at the aerofluxus being connected with four cylinders 3
Partition wall 20A, the 20C in the outside among partition wall 20A, 20B, 20C separated between mouth 23a.It addition, shunt paths 16A,
16C is arranged on the position leaning on exhaust side than bolt hole 15.Additionally, below, in the feelings distinguishing partition wall 20A, 20B, 20C the most especially
Under condition, referred to as partition wall 20.
It addition, as it is shown in figure 1, shunt paths 16A, 16C are in inclined plane 11sf of bottom 11b of cavaera 11,11sr institute
Upper surface (top) the 16c opening of the protruding part 16b possessed.Protruding part 16b is formed with inclined plane 11sf, 11sr by thickening
It is integrated.It addition, at protruding part 16b, be formed with the straight hole of the part forming shunt paths 16.It addition, upper surface (on
Portion) 16c is level, with the lower surface 10 of cylinder head 10BOParallel.
In addition it is also possible to upper surface 16c to be formed as parallel with inclined plane 11sf, 11sr.
By make shunt paths 16A, 16C at the upper surface 16c opening of protruding part 16b, thus its each air inlet 16a quilt
Be formed as protruding part 16b upper surface 16c arrange opening, with inclined plane 11sf, the direct opening of 11sr situation compared with
(in other words, compared with the situation being not provided with protruding part 16b), the position of the amount of the height being arranged in protruding part 16b high.And
And, the downside of inclined plane 11sf, 11sr it is arranged on relative to lubricating oil inlet 27,18a, each air inlet 16a of exhaust side sets
Put in inclined plane 11sf, the upside of 11sr.
Thus, (induction pathway 16A's) air inlet 16a of front side is set at the lubricating oil than front lubricating oil path 8
The position of entrance 27 high Δ h1, (induction pathway 16C's) air inlet 16a of rear side is set at than rear lubricating oil path 18
The position of lubricating oil inlet 18a height Δ h2.
Additionally, as it has been described above, electromotor 1 in the way of exhaust side is below compared with air inlet side with the appearance being slightly slanted
Gesture is equipped on vehicle.When being equipped on vehicle, although the air inlet 16a of shunt paths 16A and lubricating oil inlet 27
Compare the amount being configured low to be arranged in exhaust side, but, even if considering this reason, the air inlet 16a of shunt paths 16A
It is also at the position higher than lubricating oil inlet 27.That is, described in present invention air inlet is configured in higher than lubricating oil inlet
Position refer to, the position of the air inlet that electromotor 1 (cylinder head 10) is equipped under the lift-launch state of vehicle and lubricating oil inlet
Relation.
It addition, in lubricating oil inlet 27 as in this embodiment in the case of up and down there is amplitude, air inlet with
The comparison of the height of lubricating oil inlet is the comparison of the height of the height of the extreme lower position of lubricating oil inlet and air inlet 16a.
Further, in the present embodiment, the upper surface 16c or air inlet 16a of protruding part 16b are formed as level.This
Outward, in the case of upper surface 16c or air inlet 16a and inclined plane 11sf, 11sr are formed abreast (the most obliquely), air inlet enters
Mouthful it is the height of extreme lower position and the comparison of lubricating oil inlet 27 of air inlet with the comparison of the height of lubricating oil inlet.
[2. effect]
(1) in above-mentioned cylinder head structure, the air inlet 16a of shunt paths 16A, 16C is arranged in and compares lubricant passage way
The lubricating oil inlet 27 in footpath 8,18, position high for 18a, therefore, compared with air inlet 16a, lubricating oil can be preferentially to lubrication
Oil-in 27,18a flowing.
Therefore, it is possible to suppression lubricating oil from air inlet 16a enter shunt paths 16A, 16C and close shunt paths 16A,
16C, it is possible to stably carry out the scavenging of the air inlet carried out by shunt paths 16A, 16C.I.e., it is possible to stably carry out altering cylinder mixing
The scavenging of gas.
(2) shunt paths 16A, each air inlet 16a of 16C are formed dashing forward that the bottom 11b of cavaera 11 is arranged
The opening of the upper surface 16c of shape portion 16b, therefore, when lubricating oil enters air inlet 16a, lubricating oil must pass over protruding part
16b.That is, utilize protruding part 16b to suppress lubricating oil to flow into air inlet 16a.
(3) the bottom 11b at cavaera 11 possesses inclined plane 11sf, 11sr, and lubricating oil inlet 27,18a are configured at inclination
Face 11sf, 11sr, each air inlet 16a is arranged in ratio lubricating oil inlet 27, position high for 18a, therefore, with air inlet 16a
Compare, it is possible to lubricating oil is preferentially induced to lubricating oil inlet 27,18a.Therefore, it is possible to effectively suppression lubricating oil flow into into
Gas entrance 16a.
(4) flow path cross sectional area of the shunt paths 16 being formed at cylinder head 10 is set than the shunting road being formed at cylinder body 2
The flow path cross sectional area in footpath 17 is little.
Thus, when the air inlet of scavenging is flowed normal from cylinder head 10 to cylinder body 2, for the charge air flow of scavenging, one
The shunt paths 16,17 of series expands at the intersection of cylinder head 10 with cylinder body 2.Therefore, the pressure loss be suppressed, air inlet easily to
Cylinder body 2 flows into, it is possible to effectively carry out the scavenging of blow-by gas.
It addition, when the exception of the state labile of electromotor, it is also possible to expect that blow-by gas is in shunt paths 16,17
Middle adverse current.Shunt paths 16 flow path cross sectional area compared with shunt paths 17 is less, and once lubricating oil enters, and lubricating oil will not be arranged
Go out, easily close.Blow-by gas accumulates in the vicinity of oil sump 60 and contains more lubricating oil, therefore, once alters cylinder and mixes
Closing gas adverse current in shunt paths 16, the probability that shunt paths 16 is closed because of the lubricating oil contained by blow-by gas is relatively
High.
But, for the adverse current of such blow-by gas, a series of shunt paths 16,17 is at cylinder head 10 and cylinder body 2
Intersection be narrowed down, therefore, the lubricating oil contained by blow-by gas is mixed from altering cylinder because of throttle resistance at this intersection
Close edema caused by disorder of QI from.Therefore, it is possible to suppression lubricating oil flows into shunt paths 16 and makes shunt paths 16 close.
Shunt paths 16 is formed at partition wall 20, therefore, with shunt paths 16 is formed at front binder bolt hole 15f, after
The situation of the vicinity of binder bolt hole 15r is compared, air inlet 16a bank of cylinder direction L (with reference to Fig. 4) be arranged near in
Centre.Thereby, it is possible to air inlet is drawn into crankcase 2a with not offseting on the L of bank of cylinder direction, it is possible to do not have from crankcase 2a
Deviation ground scavenging blow-by gas.
It addition, be formed with lubrication at the bottom 11b of cavaera 11, the most such as front side at the air vent 23a of front side
Oil reservoir (omit diagram), in the case, air inlet 16a owing to being formed at partition wall 20, so, across air vent
23a configures isolator with lubricating oil reservoir.Therefore, lubricating oil at least can be suppressed (before from above-mentioned lubricating oil reservoir
The lubricating oil reservoir of the front side of the air vent 23a of side) flow into air inlet 16a and make shunt paths close.
[3. other]
This concludes the description of embodiments of the present invention, but, the present invention is not limited to above-mentioned embodiment, it is possible to not
Carry out various deformation in the range of the purport of the disengaging present invention to implement.
In the above-described embodiment, make the 1st shunt paths 16A, 16C air inlet 16a at the bottom 11b of cavaera 11
The upper surface 16c opening of protruding part 16b, and, possess from air inlet 16a to lubricating oil at the bottom 11b of cavaera 11
Entrance 27,18a decline inclined plane 11sf, the 11sr tilted.Additionally, if able to the 1st shunt paths 16A, the air inlet of 16C are entered
Mouth 16a is arranged in the lubricating oil inlet 27 than lubricating oil path 8,18, position high for 18a, then be not limited to this composition.
For example, it is also possible to making the bottom 11b of cavaera 11 is the smooth shape not having inclined plane 11sf, 11sr, and make
Air inlet 16a is at the upper surface 16c opening of the protruding part 16b being arranged at this smooth bottom 11b.Or, it is also possible to the end of at
Portion 11b is not provided with protruding part 16b, and makes air inlet 16a at inclined plane 11sf of bottom 11b, the direct opening of 11sr.
In the above-described embodiment, the partition wall that shunt paths 16A of exhaust side, 16C separate between by air vent 23a
In partition wall 20A, the 20C in the outside among 20A, 20B, 20C, it is arranged on the position leaning on aerofluxus collection portion 23b side than bolt hole 15
Put.Additionally, the configuration of shunt paths 16 is not limited to such configuration.For example, it is also possible to shunt paths 16 is arranged at central authorities
Partition wall 20B, if being spatially to allow, then can also be arranged on than bolt hole 15 by the position of air inlet side.It addition,
The number of shunt paths 16,17 is also not limited to the number of above-mentioned embodiment.
In the above-described embodiment, about shunt paths 16A, the 16C of exhaust side, its air inlet 16a is arranged in ratio
The lubricating oil inlet 27 of exhaust side, 18a position by the top.Additionally, about shunt paths 16D of air inlet side, 16E, it is also possible to
Its air inlet is arranged in the position by the top, lubricating oil inlet 28 than air inlet side.
It addition, the composition of above-mentioned shunt paths 16,17 can also apply to the aerofluxus arranged independently of each other with cylinder head
Manifold is connected to the cylinder head structure (not being the cylinder head structure of manifold internally-arranged type) of the exhaust side sidewall of cylinder head.
It addition, have the position easily forming lubricating oil reservoir in the bottom of cavaera 11, it is preferred, therefore, that point
Flow path as far as possible with such position away from.
Claims (9)
1. a cylinder head structure, is the cylinder head structure of the internal combustion engine with the transferring element from crank axial valve mechanism transmission power
Make, it is characterised in that
Described cylinder head structure includes:
Cavaera, it receives described valve mechanism；
Lubricating oil path, it is for making the lubricating oil of described cavaera fall；And
1st shunt paths, it is used for: is used in and the air inlet of blow-by gas scavenging is circulated downwards,
Air inlet in described 1st shunt paths of the bottom opening of described cavaera is configured to: take at described internal combustion engine
Under the state being loaded in vehicle, it is in the position higher than the lubricating oil inlet in the described lubricating oil path at described bottom opening.
2. cylinder head structure as claimed in claim 1, it is characterised in that
The upper opening of the protruding part that the described air inlet of described 1st shunt paths is possessed in the bottom of described cavaera.
3. cylinder head structure as claimed in claim 1, it is characterised in that
Possess inclined plane in the bottom of described cavaera, described lubricating oil inlet is configured at described inclined plane.
4. cylinder head structure as claimed in claim 2, it is characterised in that
Possess inclined plane in the bottom of described cavaera, described lubricating oil inlet is configured at described inclined plane.
5. cylinder head structure as claimed in claim 1, it is characterised in that
On the cylinder body of downside being assemblied in described cylinder head, it is formed with the 2nd shunt paths connected with described 1st shunt paths,
The flow path cross sectional area of described 1st shunt paths is set less than the flow path cross sectional area of described 2nd shunt paths.
6. cylinder head structure as claimed in claim 2, it is characterised in that
On the cylinder body of downside being assemblied in described cylinder head, it is formed with the 2nd shunt paths connected with described 1st shunt paths,
The flow path cross sectional area of described 1st shunt paths is set less than the flow path cross sectional area of described 2nd shunt paths.
7. cylinder head structure as claimed in claim 3, it is characterised in that
On the cylinder body of downside being assemblied in described cylinder head, it is formed with the 2nd shunt paths connected with described 1st shunt paths,
The flow path cross sectional area of described 1st shunt paths is set less than the flow path cross sectional area of described 2nd shunt paths.
8. cylinder head structure as claimed in claim 4, it is characterised in that
On the cylinder body of downside being assemblied in described cylinder head, it is formed with the 2nd shunt paths connected with described 1st shunt paths,
The flow path cross sectional area of described 1st shunt paths is set less than the flow path cross sectional area of described 2nd shunt paths.
9. the cylinder head structure as described in any one of claim 1～8, it is characterised in that
Described cylinder head includes:
Aerofluxus collection portion, its multiple air vent set being connected with multiple cylinders；And
Partition wall, its will between described air vent separate,
Described 1st shunt paths is formed at described partition wall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-037320 | 2015-02-26 | ||
| JP2015037320A JP6524705B2 (en) | 2015-02-26 | 2015-02-26 | Cylinder head structure |
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| Publication Number | Publication Date |
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| CN105927410A true CN105927410A (en) | 2016-09-07 |
| CN105927410B CN105927410B (en) | 2019-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610109064.4A Active CN105927410B (en) | 2015-02-26 | 2016-02-26 | Cylinder head construction |
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| JP (1) | JP6524705B2 (en) |
| CN (1) | CN105927410B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254113A (en) * | 1995-03-20 | 1996-10-01 | Suzuki Motor Corp | Blowby gas recovery device of engine |
| CN1255582A (en) * | 1998-12-01 | 2000-06-07 | 本田技研工业株式会社 | Structure of cylinder cap of multi-cylinder engine |
| JP2003293709A (en) * | 2002-03-29 | 2003-10-15 | Honda Motor Co Ltd | Internal combustion engine |
| CN1540153A (en) * | 2003-04-24 | 2004-10-27 | 三菱自动车工业株式会社 | Cylinder cap structure |
| CN201635856U (en) * | 2009-12-21 | 2010-11-17 | 广西玉柴机器股份有限公司 | Cylinder structure of diesel engine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0741857Y2 (en) * | 1989-05-10 | 1995-09-27 | いすゞ自動車株式会社 | Cylinder head cover straightening device |
| JPH03112507U (en) * | 1990-03-02 | 1991-11-18 | ||
| JPH0558809U (en) * | 1992-10-22 | 1993-08-03 | 三菱自動車工業株式会社 | Engine oil return structure |
| JP3741159B2 (en) * | 1995-08-11 | 2006-02-01 | 三菱自動車工業株式会社 | Lubricating oil return passage for internal combustion engine |
| JP3627474B2 (en) * | 1997-09-30 | 2005-03-09 | スズキ株式会社 | Engine cylinder head structure |
| JP4321606B2 (en) * | 2007-02-28 | 2009-08-26 | トヨタ自動車株式会社 | Blow-by gas reduction device, cylinder head used in the blow-by gas reduction device, and internal combustion engine including the blow-by gas reduction device |
| JP5459500B2 (en) * | 2010-05-18 | 2014-04-02 | スズキ株式会社 | Engine blow-by gas processing equipment |
| US8887703B2 (en) * | 2011-10-10 | 2014-11-18 | Ford Global Technologies, Llc | Integrated positive crankcase ventilation vent |
-
2015
- 2015-02-26 JP JP2015037320A patent/JP6524705B2/en active Active
-
2016
- 2016-02-26 CN CN201610109064.4A patent/CN105927410B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254113A (en) * | 1995-03-20 | 1996-10-01 | Suzuki Motor Corp | Blowby gas recovery device of engine |
| CN1255582A (en) * | 1998-12-01 | 2000-06-07 | 本田技研工业株式会社 | Structure of cylinder cap of multi-cylinder engine |
| JP2003293709A (en) * | 2002-03-29 | 2003-10-15 | Honda Motor Co Ltd | Internal combustion engine |
| CN1540153A (en) * | 2003-04-24 | 2004-10-27 | 三菱自动车工业株式会社 | Cylinder cap structure |
| CN201635856U (en) * | 2009-12-21 | 2010-11-17 | 广西玉柴机器股份有限公司 | Cylinder structure of diesel engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016160764A (en) | 2016-09-05 |
| CN105927410B (en) | 2019-07-16 |
| JP6524705B2 (en) | 2019-06-05 |
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Address after: No. 21, No. 3, Dingmu, No. 1, Toshiba, Tokyo, Japan Patentee after: Mitsubishi Jidosha Kogyo Kabushiki Kaisha Address before: Tokyo, Japan Patentee before: Mitsubishi Jidosha Kogyo Kabushiki Kaisha |