CN103967577B - Cooling structure for explosive motor - Google Patents
Cooling structure for explosive motor Download PDFInfo
- Publication number
- CN103967577B CN103967577B CN201410039866.3A CN201410039866A CN103967577B CN 103967577 B CN103967577 B CN 103967577B CN 201410039866 A CN201410039866 A CN 201410039866A CN 103967577 B CN103967577 B CN 103967577B
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- exhaust
- water jacket
- cylinder
- cylinder head
- jacket
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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
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/243—Cylinder heads and inlet or exhaust manifolds integrally cast together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/028—Cooling cylinders and cylinder heads in series
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Exhaust Silencers (AREA)
Abstract
The present invention relates to a kind of cooling structure for explosive motor.In there is the internal explosive motor limiting the cylinder head (4) that exhaust converges part (17), in the case of the size of the aequum or cylinder head that do not increase cooling water, the region surrounding air exit (18) is properly cooled, and air exit is limited at longitudinal midpoint on the exhaust side of cylinder head.The lower exhaust water jacket (53) and top exhaust water jacket (54) that are internally provided with the main water sleeve (51) covering from above combustion chamber, converge part the most from below with top covering exhaust of cylinder head, main water sleeve is provided with around multiple cooling water inlets (50a) that each cylinder-bore is arranged, and main water sleeve connects with lower exhaust water jacket.Top is vented the vertical passageway (55) that water jacket connects with lower exhaust water jacket be arranged on another exhaust water jacket from its part offset along cylinder array direction towards side corresponding to position of air exit.
Description
Technical field
The present invention relates to a kind of cooling structure for explosive motor, this cooling structure has restriction in its cylinder head
Exhaust converge part.
Background technology
In traditional multicylinder engine, multiple air inlet port and exhaust port are limited in cylinder head so that they
Uncovered on the air inlet side surface of cylinder head and exhaust side surface respectively, and for distributing the inlet manifold of air inlet and being used for
The exhaust manifold converging exhaust is respectively attached to the air inlet side surface of cylinder head and exhaust side surface.Recently, it is used for converging
The exhaust of conjunction exhaust converges part and is sometimes limited in cylinder head, so that individually blast pipe is connected to cylinder
The exhaust side surface of lid.
Converge in multicylinder engine partly having the exhaust being limited in cylinder head, owing to there is not the row of outside
Gas manifold, so the overall dimensions of engine can be reduced, and can obtain extra advantage: i.e., reduce by
The heat loss caused in the exhaust of release heat；And accelerate the heating to emission control system, to activate therein urging
Agent.Reduce additionally, due to each combustion chamber and exhaust converge the distance between the port of export of part, so when starting
Machine equipped with by exhaust stream provide power booster (turbocharger) time, the response characteristic of booster can be improved.
On the other hand, in order to avoid the thermal degradation and/or the work that excessively promote the catalyst caused of the temperature of exhaust may be passed through
It is used in the thermal stress on engine and blast pipe, it may be necessary to exhaust suitably cooled down.
Cooling structure as the cylinder head for multicylinder engine, it is known that formed and be used for covering from above exhaust fluidic junction
The top divided is vented water jacket, converges lower exhaust water jacket partly for covering exhaust from below and be positioned at air exit
Both sides on for connecting top exhaust water jacket and a pair vertical passageway of lower exhaust water jacket, aforementioned air exit phase
Cylinder array direction is arranged on to the midpoint of cylinder head.With reference to JP2008-309158.
It is also known that a pair communicated with each other with lower exhaust water jacket for top is vented water jacket wherein vertically connects logical
Road is arranged in the structure on the both sides of air exit, cools down water in whole cylinder head jacket along cylinder array side
To flowing, cylinder head jacket includes the main water sleeve covering from above combustion chamber.With reference to US7784442.
According to another conventional layout again, in the structure for making cooling water flow along cylinder array direction as entirety
In, cooling current are divided into the main flow for main water sleeve and time stream for exhaust water jacket, and the two current are at connector
In converge, connector is limited by the single component relative to the one end in cylinder array direction being attached to cylinder head.Ginseng
According to JP4337851B.
When the situation in JP2008-309158 with US7784442 is the same, cooling-water duct is constructed such that cooling
When water flows along cylinder array direction, it is arranged on the axially opposite end of passage for cooling down the entrance and exit of water
On.But, the cross-sectional area of cooling-water duct is broadened in the region surrounding air exit, so that cooling
Water flowing velocity in this region is less, and this makes the cooling in this region impaired.When vertical passageway is arranged on exhaust
During the both sides of outlet, cooling water can flow along air exit both sides, but owing to cooling down upper at air exit of water
Flow stagnation in portion and bottom, so the part surrounding air exit may will not be sufficiently cool, so that
Surface is installed or for installing the installation surface of the connecting tube of exhaust apparatus it may happen that heat for install exhaust apparatus
Deformation.
On the other hand, if as proposed by JP4337851B, from exhaust side water jacket be used for cool down exhaust converge
The cooling current of conjunction part are the branches of the main flow from the main water sleeve being placed on above combustion chamber, then surround air exit
Part cooled be water-cooled to specific degree, cooling water flows in the exhaust side water jacket suffering relatively small flow resistance,
But, the flow rate around the cooling water of air exit is not the most abundant.Sufficient stream in order to ensure cooling water
Dynamic speed, needs to increase further the amount of the cooling water of circulation, and increases the volume of cooling water by needing and therefore increase
The size of cylinder head.
Summary of the invention
The present invention be directed to the problems referred to above of prior art and make, and its main purpose is, provide one to use
In the cooling structure of explosive motor, this explosive motor limits exhaust equipped with inside and converges the cylinder head of part, this
The part allowing encirclement exhaust to converge part is sufficiently cool, and without increasing the volume of cooling water and therefore increasing gas
The size of cylinder cap.
According to the present invention, this purpose can realize by providing a kind of cooling structure for explosive motor, and this is interior
Burn engine includes limiting the cylinder block 3 of an exhaust cylinder holes 2 and being arranged on the cylinder on the top surface of described cylinder block
Lid 4, described cylinder head and the top surface cooperation of the piston 5 being slidably received in each cylinder-bore and limit
Determining combustion chamber 6, the inside of described cylinder head and described cylinder block limits cylinder head jacket 50 He being interconnected respectively
Block jacket 70, it is characterised in that: the exhaust that is internally provided with of described cylinder head converges part 17 and multiple exhaust
Port 16, each exhaust port is respectively provided with the upstream extremity uncovered towards corresponding combustion chamber, and described exhaust converges part
The plurality of exhaust port is converged, and described exhaust converges part 17 and is included in the side surface of described cylinder head
The air exit 18 that longitudinally central portion is uncovered；And described cylinder head jacket includes covering from above described combustion chamber
Main water sleeve 51, cover described exhaust from below and converge the lower exhaust water jacket 53 of part, and cover from above institute
State exhaust converge part top exhaust water jacket 54, described main water sleeve be provided with around each cylinder-bore arrange multiple cold
But a row in water inlet 50a, and described main water sleeve and described lower exhaust water jacket and described top exhaust water jacket
Air water set connection；Wherein, described lower exhaust water jacket and described top are vented the vertical passageway that water jacket communicates with each other
55 be arranged on described lower exhaust water jacket and described top exhaust water jacket in another exhaust water jacket with lower part
In, this part is vented the position corresponding to described air exit of water jacket along cylinder array direction court from described another
Side offsets, and is arranged on another exhaust water described for the coolant outlet 50b of another exhaust water jacket described
Set with in lower part, this part from the position corresponding to described air exit of another exhaust water jacket described along institute
State cylinder array direction to offset towards opposite side.
According to this layout, it is introduced into the cooling water of main water sleeve in one exhaust water jacket towards vertical passageway obliquely
Flow through cylinder-bore.Therefore, even if one exhaust water jacket is provided with the width become narrow gradually towards air exit,
Cooling water gently can also flow along the region surrounding air exit.Subsequently, cooling water flows into via vertical passageway
In another exhaust water jacket described, and relative to cylinder array direction from one end flowing of another exhaust water jacket described
To its other end.This create and be vented on water jacket rightabout, with one, the cooling water flowed along air exit
Stream.Therefore, it is allowed to cooling water gently flows through whole exhaust water jacket and prevents in the region surrounding air exit
Stagnate, so that cylinder head, especially surround the region of air exit, can be advantageously cooled.
According to an aspect of the present invention, the described cooling water of the described main water sleeve 51 connected with described block jacket 70
Entrance is preferentially arranged on the air inlet side of described main water sleeve.
Therefore, it is allowed to most of cooling water participates in flowing through the oblique flow of the cooling water of cylinder-bore, so that encirclement is arranged
The region of gas outlet can especially advantageously be cooled down.
Preferably, in addition to the cooling water inlet of main water sleeve is preferentially arranged on air inlet side, also by block jacket
The cooling water inlet 70a of 70 is arranged on the exhaust side of cylinder block.Therefore, it is allowed to the cooling water in cylinder block is flowing through
Before the cooling water inlet of main water sleeve, flow through cylinder-bore, so that cooling water is effectively used to cylinder block and cylinder
The cooling of lid.
According to the preferred embodiment of the present invention, lower exhaust water jacket and top exhaust water jacket are communicated with each other is vertical logical
Road 55 is formed the casting cavity closed by independent plug member 44.
Therefore, can be used to form this vertical passageway for supporting the core print of casting core, aforementioned casting core is used
In forming top exhaust water jacket and/or lower exhaust water jacket, such that it is able to simplify the manufacture process of engine.
According to a further aspect in the invention, described lower exhaust water jacket 53 and described top are vented in water jacket 54 at least
One exhaust water jacket is provided with extension passage 53d, and this extension passage is from the outward flange edge of at least one exhaust water jacket described
Described exhaust and converge the outside extension of part, and described vertical passageway 55 is arranged in described extension passage.
According to this layout, bearing from such as booster, emission-control equipment and the connection for this device of cylinder head
The side of the heat of the exhaust apparatus of pipe can be cooled efficiently.And, the permission that arranges extending passage reduces vertical
The effective length of passage, this additionally aids increases cooling water in the case of the volume not increasing whole engine water jacket
Flow rate.Additionally, by making vertical passageway 55 stretch out or extending beyond the outline extending passage, cooling
Water can more gently flow through vertical passageway.
According to the especially preferred embodiment of the present invention, described extension passage 53d is arranged on one exhaust water jacket
In.Preferably, one exhaust water jacket is described lower exhaust water jacket 53.
According to the present invention another preferred embodiment, described vertical passageway 55 and described coolant outlet 50b phase
Described cylinder array direction is separately positioned in the substantially end section of another exhaust water jacket 54 described.Therefore,
Make the drag minimization of flow of cooling water, and make the cooling effect of cooling water maximize.
According to the cooling structure for engine provided by the present invention, surround the exhaust being limited in cylinder head and converge
The part of part can be sufficiently cool, and without increasing demand or the size of cylinder head of cooling water.
Accompanying drawing explanation
Fig. 1 is the front view of the engine that the first embodiment as the present invention is given；
Fig. 2 is the profile of the engine of the cutting line II-II intercepting along Fig. 1；
Fig. 3 is the zoomed-in view of a part of Fig. 2；
Fig. 4 is the stereogram of the cylinder head shown in Fig. 1；
Fig. 5 is the front view of the cylinder head shown in Fig. 1；
Fig. 6 is the upward view of the cylinder head shown in Fig. 1；
Fig. 7 is the profile of the amplification of the engine of the cutting line VII-VII intercepting along Fig. 5；
Fig. 8 is the profile of the amplification of the engine of the cutting line VIII-VIII intercepting along Fig. 5；
Fig. 9 is the stereogram of the first and second water jacket casting cores for the first embodiment；
Figure 10 is the face upwarding stereogram disassembled of the casting core shown in Fig. 9；
Figure 11 is the front view of the casting core shown in Fig. 9；
Figure 12 is that the figure that the flowing to the cooling water in the engine shown in Fig. 1 illustrates regards；
Figure 13 A and Figure 13 B is that the flowing to the cooling water in the lower exhaust water jacket shown in Fig. 9 illustrates
Figure regards；
Figure 14 A and Figure 14 B is that the flowing of the cooling water being vented the top shown in Fig. 9 in water jacket illustrates
Figure regards；
Figure 15 be by the pressure loss in the different piece of the water jacket in the cylinder head shown in Figure 12 be used for comparing
The chart that example compares；
Figure 16 be by the flow rate in the different piece of the water jacket in the cylinder head shown in Figure 12 be used for comparing
The chart that example compares；
Figure 17 is the upward view of the cylinder head that the embodiment as amendment is given；
Figure 18 is the upward view of the cylinder head be given as the second embodiment；
Figure 19 is that the figure that the flowing to the cooling water in the second embodiment illustrates regards；
Figure 20 is the front view of the engine being presented as the example for comparing；
Figure 21 is the engine that is presented as the example for comparing to be intercepted along the cutting line XXI-XXI of Figure 20
Profile；And
Figure 22 is the front view of the casting core of the cylinder head be given as the example for comparing shown in Figure 20.
Detailed description of the invention
Below with reference to accompanying drawings, the automobile internal engine (engine 1) implementing the present invention is illustrated.
First embodiment
As depicted in figs. 1 and 2, engine 1 is mainly made up of DOHC tetra-valve inline four-cylinder engine, and
Including limiting four cylinder block 3 arranging cylinder-bore 2 in a row, and it is attached to the box of the upper surface of cylinder block 3
The cylinder head 4 of shape, this cylinder head is perpendicular to cylinder-bore 2 and extends.Cylinder block 3 and cylinder head 4 are by pack alloy system
Become.
In the following description, it is assumed that engine is oriented such that the axis (cylinder-bore axis) of each cylinder-bore 2 is along vertical
Vertical direction extend, and the exhaust side face forward of laterally disposed engine 1.But, when being installed in car
Time on, the actual orientation of engine 1 is not by this example limitation.In the following description, for the ease of describing, vertically
Direction and fore-and-aft direction are limited by the arrow in Fig. 2 of this orientation based on engine 1.Such as, cylinder block 3
It is positioned at below cylinder head 4.The horizontal direction row based on the vehicle being provided with engine 1 indicated by the arrow in Fig. 1
Sail direction.
Each cylinder-bore 2 slidably receives piston 5, and combustion chamber 6 is limited at the top table of piston 5
Between face and the bottom surface (surface downwards) limited relative to face 4a with cylinder block 3 from cylinder head 4.
In the embodiment as shown, the interface between cylinder head 4 and cylinder block 3 is horizontal-extending, although and not at figure
Shown in, the packing ring constructed for this interface is inserted between cylinder head 4 and cylinder block 3.
The lower surface of cylinder block 3 is attached with food tray (not shown), and this food tray receives the lubricating oil from top drippage.
Cylinder block 3 and food tray are collectively defined as receiving the crankcase of the bent axle being not shown.The upper end of cylinder head 4 is attached
It is connected to valve mechanism cover (not shown) so that for receiving the valve actuation chamber 9 of valve actuation mechanism 8 by cylinder
Lid 4 and valve mechanism cover limit jointly.It is to say, the upper surface of the diapire of cylinder head 4 limits valve actuation chamber 9
Bottom surface 9a.
A pair intake valve 10 and a pair air bleeding valve 11 are slidably kept by the cylinder head 4 of each cylinder.Valve
Door actuation chamber 9 receives admission cam shaft (not shown), intake rocker 12, exhaust cam shaft 13 and exhaust to shake
Arm 14.By the valve actuation mechanism 8 formed by these parts, intake valve 10 and air bleeding valve 11 activated by bent axle or
Opened and closed by bent axle.
Cylinder head 4 be internally provided with a pair air inlet port 15 and a pair exhaust port 16, air inlet port is by each gas
The corresponding air intake valve 10 of cylinder opens and closes, and exhaust port is opened by the corresponding drain tap 11 of each cylinder
And closedown.Each air inlet port 15 has upstream extremity and downstream, and upstream extremity is being limited at the rear side of cylinder head 4
Air inlet side surface 4c at uncovered, downstream leads to corresponding combustion chamber 6.Each exhaust port 16 has upstream extremity
And downstream, upstream extremity leads to corresponding combustion chamber 6, and downstream and other exhaust port 16 converge.More specifically
Ground, converges part 17(with reference to Fig. 6 for converging the exhaust of exhaust port 16) it is limited in cylinder head 4.As
Shown in Fig. 4 and Fig. 5, exhaust converges part 17 and has the air exit 18 held downstream, this air exit
18 is uncovered in the longitudinally central portion of the exhaust side surface 4d of the front side being limited at cylinder head 4.
As shown in Figures 1 and 2, the booster (turbocharger) 19 of the downstream of air exit 18 it is connected to
By using bolt 20 to be directly installed on the exhaust side surface 4d of cylinder head 4.Booster 19 is provided with whirlpool
Turbine 23 and compressor 24, both is by being used for receiving the middle case of the laterally armature spindle 21 that (level) extends
Body 22 connects.
Turbine 23 includes turbine cylinder 25, exhaust inlet pipe 26 and Outlet flange 27, and turbine cylinder connects
Receiving the turbine rotor (not shown) of the right-hand member being attached to armature spindle 21, exhaust inlet pipe is from turbine cylinder
The rear surface of 25 extends back and has the inlet flange 26a limiting exhaust entrance, Outlet flange at its free end
It is formed in the right lateral surface of turbine cylinder 25 to limit air exit 27a.
Compressor 24 includes compressor housing 28, inlet flange 29 and gas entry outlet pipe 30, and compressor housing connects
Receiving the compressor drum (not shown) of the left end being attached to armature spindle 21, inlet flange is arranged on compressor housing
To limit entrance in the left-hand face of 28, gas entry outlet pipe downwardly extends from the bottom surface of compressor housing 28 and has
It is formed at its free end to limit the Outlet flange 30a of gas entry outlet.
Turbine 23 is positioned at the middle position of cylinder head 4 relative to the direction of cylinder array and (or is positioned at four
The intermediate point of individual cylinder-bore 2).Compressor 24 is positioned at the left-hand side of cylinder head 4.The air exit 27a of turbine 23
It is centrally located at above armature spindle 21, the friendship substantially and between cylinder head 4 and cylinder block 3 of the axis of this armature spindle
Interface is positioned on sustained height.Therefore, the air exit 27a of turbine 23 is centrally located at the cooperation of cylinder head 4
The top of face 4a.As a result, in the front of engine, the lower section of the air exit 27a of turbine 23, limit phase
To bigger space.
This space exhaust cleaning devices 31, this exhaust cleaning devices is connected to the downstream of turbine 23.Exhaust is clear
Clean device 31 includes: triple-effect catalytic unit 32, and this triple-effect catalytic unit has the flowing being parallel to be vented to tilt to the left
The axis that downwardly extends of mode；Exhaust inlet pipe 33, this exhaust inlet pipe bend into the left horizontal direction it
Before from the upper surface (this upper surface is downward-sloping towards right side) of triple-effect catalytic unit 32 in the way of being tilted to the right along tiltedly
Upwardly direction extend, and this exhaust inlet pipe its free end be provided with inlet flange 33a(limit be vented into
Mouthful)；Exhaust exit pipe 34, this exhaust exit pipe downwardly extends from the lower end of triple-effect catalytic unit 32.Exhaust gas cleaning fills
Put 31 along this orientation positions in the front of cylinder block 3, and inlet flange 33a is secured to the outlet of turbine 23
Flange 27.
As it is shown in figure 1, the upper right quarter of the front surface of cylinder block 3 (that side of the exhaust side surface 4d of cylinder head 4)
Be provided with for block jacket 70(Fig. 2) cooling water inlet 70a.
As shown in Figure 6, exhaust converges part 17 and includes: four first are converged part 17a, each first fluidic junction
Divide two exhaust ports 16 converging corresponding combustion chamber 6；Part 17b is converged in a pair upstream second, these upstreams
Two converge part converges part 17a by the first of two right sides respectively and merges together, and by first remittance in two left sides
Close part 17a to merge together；And downstream second converges part 17c, part is converged by two in this downstream second
Trip second converges part 17b and merges together, and has the cross section of constant at its exit region.Exhaust converges
Close part 17 and be provided with the plane outline tapered from combustion chamber 6, thus prevent from the discharge of each combustion chamber 6
Exhaust flows in the exhaust port of adjacent combustion chamber 6, and therefore reduces exhaust resistance.
But, the first major part converging part 17a is formed at corresponding in the region of the cooperation face 4a of cylinder head 4,
As seen at upward view (Fig. 4)；Part 17b is converged in upstream second and downstream second is converged part 17c and is positioned at gas
The front of the cooperation face 4a of cylinder cap 4.It is to say, the antetheca of cylinder head 4 highlights forward from cylinder block 3, therefore
Form depending portion.
The restriction of the antetheca of cylinder head 4 first converges part 17a and the partially defined ellipse of part 17b is converged in upstream second
Circular contour, wherein mid portion is more more than end highlights.Part 17c is converged in the downstream second that limits of cylinder head 4
Part is formed as tube, and the part that this tube converges part 17b from restriction upstream second is prominent (in exhaust forward
At side surface 4d).From cylinder block 3 prominent with limit first converge part 17a, part 17b is converged in upstream second and
The depending portion of part 17c is converged in downstream second will be referred to as projection 41 in the following description.According to this structure,
Projection 41 can only limit exhaust and converge a part for part 17.Such as, first converge part 17a or this
One part converging part can be limited in cylinder head 4 by suitably internal, and part is converged in even upstream second
A part of 17b can also be appropriately defined in cylinder head 4.In projection 41, limit downstream second and converge
The part closing part 17c will be referred to as air exit tubulose portion 42.
At the cooperation face 4a of cylinder head 4, cylinder head 4 is fastened to the bolt of cylinder block 3 (in figure for receiving
Not shown) bolt-through hole 4e be between every pair of adjacent combustion chamber 6 and be in each end combustion chamber
Ten position openings on the outside of 6.Additionally, at the cooperation face 4a of cylinder head 4, cylinder head jacket more than 50
Individual cooling water inlet 50a(Fig. 2) the most at regular intervals around four cylinder-bore 2(combustion chambers 6) whole week
Side forms (so that the region of the combination of cooling water inlet 50a is the most identical for each cylinder-bore 2).
As shown in Figures 3 to 5, air exit tubulose portion 42 is inclined upwardly away from combustion chamber 6, and at its end
Place has the installed surface 42a for connecting booster 19.Installed surface 42a is inclined upwardly (face relative to cylinder-bore axis
Vertical surface forwardly).
Because air exit tubulose portion 42 constructs in the manner shown, it is connected to the increasing of air exit 18
Depressor 19 and the emission-control equipment 31 being connected to hold downstream can be spaced apart with cylinder head 4 and cylinder block 3, and
Without increasing the distance between combustion chamber 6 and booster 19 or without extending air exit tubulose portion 42 and therefore increasing
Add the size of cylinder head 4.It is therefore prevented that the excess calories lifting cylinder of booster 19 and emission-control equipment 31
The temperature of lid 4.
On the other hand, as found out from the example being used for comparing shown in Figure 20 and Figure 21, if exhaust exit pipe
Shape portion 42 is perpendicular to cylinder-bore axis and extends forward, in order to booster 19 is spaced apart with cylinder head 4 and cylinder block 3,
Air exit tubulose portion 42 must be extended, thus the size increasing cylinder head 4 of having to, and combustion chamber 6 He
The length of the increase of the exhaust passage between booster 19 hampers the response performance of booster 19.
Contrary, according to the present invention, due to the acclivitous structure in air exit tubulose portion 42 with the example for comparing
Making, booster 19 can be spaced apart with cylinder head 4 in the case of the size not increasing cylinder head 4.And, logical
Crossing and make air exit tubulose portion 42 be inclined upwardly, booster 19 can be placed on relative to the use shown in Figure 21
Position of a relatively high for the example compared, thus improve the exhaust of the downstream being connected to booster 19
Purifier 31(Fig. 1) performance.
More specifically, as depicted in figs. 1 and 2, it is connected to the exhaust gas purification dress of the exhaust entrance 27a of turbine 23
Put 31 to be bent downwardly by exhaust inlet pipe 33, and tilted by triple-effect catalytic unit 32, ensure that triple effect
The suitable performance of catalyst converter 32.If the example one being used for comparing that booster 19 is as shown in figs. 20 and 21
Sample is arranged, when the exhaust entrance 27a of turbine 23 is positioned at relatively low position, in order to make three with same performance
Effect catalyst converter 32 is placed in identical space, it has to increases the inclination angle of triple-effect catalytic unit 32, thus reduces
The layout freedom of other auxiliary equipments, and have to improve to making exhaust the curvature of exhaust inlet pipe 33
The degree that smooth outflow is hindered.It is to say, in order to guarantee suitable layout freedom same of auxiliary equipment
The smooth outflow of Shi Gaishan exhaust, it has to reduce the performance of triple-effect catalytic unit 32.But, by by air exit
Tube 42 is inclined upwardly so that exhaust flowing Uniform Flow in catalyst converter, thus by reducing exhaust inlet pipe
The angle of bend of 33 and avoid the localized degradation of catalyst, and the performance of emission-control equipment 31 can be increased.
Referring again to Fig. 3 to Fig. 5, the free end in air exit tubulose portion 42 is provided with four around air exit 18
Individual fastening protrusion 43, for being fastened thereon booster 19.Two in fastening protrusion 43 are positioned at air exit
Above in the of 18, and from air exit lateral shift, the other two in fastening protrusion is positioned at below air exit 18, and
From air exit lateral shift.
As shown in Figures 2 and 3, the cylinder head jacket 50 being internally provided with for cooling down cylinder head 4 of cylinder head 4.
Cylinder head jacket 50 includes that being arranged on exhaust converges the lower exhaust water jacket 53 below part 17 and be arranged on exhaust remittance
Close the top exhaust water jacket 54 above part 17.
The mounting structure of booster 19 is explained below.As shown in Figures 2 and 3, fastening protrusion 43 and wall 46 1
Body ground couples, and valve actuation chamber 9 is separated by wall 46 with top exhaust water jacket 54.For lightweight and compact set
The purpose of meter, this wall less than fastening protrusion 43, is arranged so that top fastening protrusion 43 is protruding to top on thickness
In air water set 54 and valve actuation chamber 9.
Owing to top fastening protrusion 43 is protruding in top exhaust water jacket 54 and valve actuation chamber 9 and the most convex
Going out to top exhaust water jacket 54, therefore top fastening protrusion 43 is cooled in an efficient way, such that it is able to avoid
Infringement to the sealing property of the part around air exit 18.Owing to top fastening protrusion 43 is protruding to valve actuation
In chamber 9, it is therefore prevented that the top fastening protrusion 43 interference to valve actuation chamber 9, do not increasing cylinder head 4 simultaneously
Allow in the case of size booster 19 is placed on higher position.
As shown in Figure 6 and Figure 7, bottom fastening protrusion 43 be formed at air exit tubulose portion 42 lower wall 42b from
By in end.Due to the purpose for lightweight and compact design, lower wall 42b on thickness again smaller than fastening protrusion 43,
So the lower surface that bottom fastening protrusion 43 is from air exit tubulose portion 42 protrudes.Bottom fastening protrusion 43 relative to
The installation surface 42a of booster 19 extends vertically.Therefore, as seen from following (Fig. 6), bottom fastening is convex
Platform 43 extends along direction forwardly and rearwardly, and its rear end is relative to direction forwardly and rearwardly, is positioned at and is vented out
The middle position of the lower wall 42b of mouth tube 42.It is to say, fastening protrusion 43 extends only to projection
The free end of 41, and it is not extend to the base portion side (part 17b is converged in this partially defined upstream second) of projection 41
To protrude past cylinder block 3 in depending portion form.
As shown in Figure 6, the lower surface of projection 41 is formed with pair of ribs 47, and this pair of ribs is from cylinder head
The peripheral part of the cooperation face 4a having a common boundary with cylinder block 3 of 4 extends to corresponding fastening protrusion 43.These flanks 47
Extend along direction forwardly and rearwardly or to extend in the way of cylinder array, and when they are from fastening
Boss 43 extends to offsetting with one another when coordinating face 4a with what cylinder block 3 was had a common boundary of cylinder head 4.
As it has been described above, booster 19 and emission-control equipment 31 are arranged in cylinder block 3 and the front of cylinder head 4, from
And make these devices be heated to higher temperature after starting the engine 1.Protrude past the protuberance of cylinder block 3
Points 41, the in particular lower surface of projection, bears automatic pressure intensifier 19 and by conduction, radiation and convection current
The heat of emission-control equipment 31.When the lower surface of projection 41 is heated excessively, caused projection
Sealing between cylinder head 4 and booster 19 may be adversely affected by the thermal deformation of 41.But, illustrating
Embodiment in, the flank 47 being formed on the lower surface of projection 41 extends away from cylinder array, thus anti-
Stop the deformation of projection 41.
Because booster 19 and emission-control equipment 31 are attached to the projection 41 of cylinder head 4, act on protrusion
Load in part 41 at high temperature can cause the deformation of projection 41.But, owing to flank 47 is from by gas
The peripheral part of the cooperation face 4a of the cylinder head 4 that cylinder body 3 supports extends to bottom fastening protrusion 43, as the rib of beam
Portion 47 cooperates with fastening protrusion 43, is effectively improved the rigidity of projection 41, thus prevents convex on the whole
Go out the deformation of part 41.
Owing to two flanks 47 being formed on the lower surface of projection 41 are from being formed at air exit tubulose portion 42
The bottom fastening protrusion 43 of both sides extend so that the most inclined towards cylinder head 4 relative to the cooperation face 4a of cylinder block 3
The flexural deformation in air exit tubulose portion 42 is not only effectively prevent from, the two flank 47, but also effectively
Prevent its torsional deflection.
As amendment, flank 47 can be to be configured to the form shown in Figure 17.In the embodiment of this amendment, with
Two flanks 47 extending from two bottom fastening protrusion 43 towards cylinder head 4 with coordinating that cylinder block 3 is had a common boundary
Face 4a extends, and the two flank is intersected with each other.Specifically, when the two flank 47 be attached to cylinder head 4 with gas
During the cooperation face 4a that cylinder body 3 has a common boundary, the separate distance of the two flank is attached to each fastening protrusion than them
Want big when 43.The flank 47 of this structure also effectively prevent projection 41 toward and away from cylinder array
Direction and horizontal direction on deformation.
Below with reference to Fig. 9 to Figure 11, cylinder head jacket 50 is described, those figures show for being vented logical
The casting core 60 of road and cylinder head jacket 50.In the accompanying drawing that these show casting core 60, for convenient
Describe purpose, employ in identical accompanying drawing the space for such as exhaust passage and water jacket numbering and for
Component or the numbering of casting core 60.
As shown in Figures 9 to 11, cylinder head jacket 50 includes the main water sleeve 51(Fig. 2 covering from above combustion chamber 6)
With the exhaust side water jacket 52(Fig. 6 converging part 17 around exhaust).Exhaust side water jacket 52 includes the row of covering from below
Gas converges the lower exhaust water jacket 53 of part 17 and covers from above exhaust and converge the top exhaust water jacket 54 of part 17.
Exhaust port 16(Fig. 5) and exhaust converge part 17 by the casting mould being placed on for casting cylinder cover 4
In blast pipe casting core 61 formed.Analogously, main water sleeve 51 and lower exhaust water jacket 53 are by the first water jacket
Casting core 62 is formed.It is to say, main water sleeve 51 and lower exhaust water jacket 53 are being positioned at every pair of adjacent burning
Between room 6 except needing to avoid (the figure that communicates with each other on the whole region in addition to the part of three bolt through hole 4e
6).More specifically, lower exhaust water jacket 53 connects with main water sleeve 51 at the part corresponding to combustion chamber 6.Similar
As, top exhaust water jacket 54 is formed by the second water jacket casting core 63.These cores 60 are mainly by by bonding
The sand grains composition of agent hardening, so that these cores 60 are by using core print 64 to be fixed in casting mould
Position in, and be disassembled after having cast cylinder head 4 and remove.
As the replacement of neighbouring air exit 18 arrangement, core print 64 is arranged on from air exit 18 to right avertence
Move and be relatively distant from three positions of air exit 18.Referring also to Fig. 6, the core print 64 kept right most is from correspondence
Part (converging the downstream of the exhaust passage of two exhaust ports 16) in the first upstream extremity converging part 17a
Extend to the right.Remaining two core print 64 converges the laterally aligned part of part 17a forward (such as edge from first
Forward and backward directions finding) extend, first converges two that part 17a converges that the combustion chamber 6 with low order end connects
Exhaust port 17.
The bar being shaped as there is circular cross section of each core print 64, and it is provided integrally at the second water by utilization
Core print top 64b on set casting core 63 covers and is provided integrally at the core on the first water jacket casting core 62
Seat bottom 64a is formed.Core print bottom 64a is connected to extend the upper end of passage 53d, and this extension passage is arranged from bottom
The leading edge of air water set 53 is upright.Core print top 64b is connected to the leading edge 54f of top exhaust water jacket 54.By
In there is core print 64, the wall of the cylinder head 4 formed by die casting demonstrates that through hole 4f(is with reference to Fig. 8), these lead to
Hole is closed by stopper 44, to guarantee the connection between lower exhaust water jacket 53 and top exhaust water jacket 54.
It is to say, lower exhaust water jacket 53 and top exhaust water jacket 54 communicate with each other via vertical communicating passage 55,
This vertical communicating passage includes the space limited by core print 64, and these vertical communicating passage 55 are used as bottom and arrange
The coolant outlet of air water set 53 and the cooling water inlet of top exhaust water jacket 54.
By utilizing the space created by core print 64 to form vertical communicating passage 55 by this way, eliminate processing
Cylinder head 5 and after having cast cylinder head the job step of closed-wall, thus decrease the quantity of required work.
As shown in Figure 10 and Figure 11, from the lower surface of the first water jacket casting core 62 for forming main water sleeve 51
Part is downwardly projected the cooling water of cylinder body-cylinder cap communicating passage 56, cylinder body-cylinder cap communicating passage and cylinder head jacket 50
Entrance 50a connects so that cooling water drainage to go out block jacket 70(Fig. 2).
Therefore, cooling water mainly flows in engine 1 as illustrated in fig. 12.More specifically, from cooling water inlet
70a is introduced into the cooling water in block jacket 70, is flowing into cylinder head jacket via cylinder body-cylinder cap communicating passage 56
Before the main water sleeve 51 of 50, first pass around the array of cylinder-bore 2.Then, cooling water flows through main water sleeve 51, with edge
Combustion chamber 6 is flow through in the direction being perpendicular to cylinder array, and flows into lower exhaust water jacket 53.Hereafter, cooling water via
The vertical communicating passage 55 offset to the right flows into top exhaust water jacket 54, and is being discharged from coolant outlet 50b
Before cylinder head 4, flow through top exhaust water jacket 54 from left to right.
Referring again to Fig. 9 to Figure 11, main water sleeve 51 extends along the cylinder array direction of the profile following combustion chamber 6,
And there is less protrusion towards its upper end, avoid air inlet port 15(Fig. 2 simultaneously), exhaust port 16(Fig. 2)
With the hole for receiving spark plug.The bottom of main water sleeve 51 with as cylinder head jacket 50 entrance 50a cylinder body-
Cylinder cap communicating passage 56 connects.
Converging except covering exhaust from below in addition to planar portions 53c of part 17, lower exhaust water jacket 53 includes from plane
The discharge side edge (the exhaust side surface 4d along cylinder head 4 extends) of portion 53c extends towards top exhaust water jacket 54
Extension passage 53d.As shown in Figures 2 and 3, passage 53d is extended from (the exhaust side surface of cylinder head 4, front
That side of 4d) cover exhaust converge part 17, Fig. 3 is the zoomed-in view of the relevant portion of Fig. 2.
In general, in order to make the quantity of required casting core minimize, main water sleeve 51 and the bottom communicated with each other
Exhaust water jacket 53 is vented together with water jacket 54 with top, shown in the example for comparing as shown in Figure 22
Sample, is formed with the most common water jacket casting core 65.Therefore, in order to make lower exhaust water jacket 53 and top row
Air water set 54 is formed as covering main water sleeve 51 from above and below, need to make water jacket casting core 65 towards exhaust
The side of outlet 18 is all opened wide, to allow to insert blast pipe casting core 61 from end.Therefore, it can in the past
Side covers exhaust and converges part 17.
On the other hand, according to the embodiment illustrated, as shown in Figures 9 to 11, it is used for forming cylinder head jacket 50
Casting core include two parts, i.e. for formed lower exhaust water jacket 53 the first water jacket casting core 62 and use
In the second water jacket casting core 63 forming top exhaust water jacket 54.Therefore, it can by being formed to lower exhaust water
The extension passage 53d of set 53 and top exhaust water jacket 54 covers exhaust and converges part 17 from front.
Due in the discharge side edge (leading edge) of the lower exhaust water jacket 53 extended towards top exhaust water jacket 54
It is provided with extension passage 53d, the exhaust side surface 4d of cylinder head 4 to be advantageously cooled, thus prevent and be vented out
Mouth tube 42 overheats, and the exhaust side surface of aforementioned cylinder head is born automatic pressure intensifier 19 and is connected to be vented out
Emission-control equipment 31(Fig. 1 of mouthful tube downstream) heat.
With reference to Fig. 9 to Figure 11, lower exhaust water jacket 53 is additionally provided with pecker 53e, and this pecker is from planar portions 53c
The part corresponding to air exit 18 (or its laterally middle portion) of discharge side edge (leading edge) along forward
Direction extend towards air exit 18.As it is shown in fig. 7, pecker 53e arrives air exit tubulose portion 42 times
Wall 42b, thus the export department of part 17c is converged in the downstream second covering the cross section with constant from below.
In the figure 7, for the ease of comparing with Fig. 3, extend passage 53d and be illustrated by the broken lines.
As it has been described above, because include that the projection 41 in air exit tubulose portion 42 extends beyond cylinder block 3, with shape
Become depending portion, therefore even if from booster 19 and the heat of the emission-control equipment 31 being connected to projection downstream
Amount may cause the lower wall 42b in air exit tubulose portion 42 overheated, because lower exhaust water jacket 53 is provided with reaches
Pecker 53e at the lower wall 42b in air exit tubulose portion 42, therefore the lower wall 42b in air exit tubulose portion 42
Can be advantageously cooled, thus avoid the deformation in air exit tubulose portion 42.
As shown in Figures 9 to 11, the shape of top exhaust water jacket 54 is generally planar.Top exhaust water jacket 54
The discharge side edge of leading edge 54f(cylinder head 4) it is formed with the right-hand side (upstream side) of vertical communicating passage 55 along it
It is provided with the oval outline (with reference to Fig. 6) converging part 17b with upstream second and being consistent, and it surrounds perpendicular
Extend around vertical communicating passage 55 beyond cartouche further along to the part of communicating passage 55.Meanwhile,
The left-hand side (downstream) of the leading edge 54f of top exhaust water jacket 54 along the direction of cylinder array from corresponding to leaning on most
The cylinder array central linear of front prominent air exit 18 extends.
It is to say, as shown in plan view, the leading edge 54f of top exhaust water jacket 54 second converges in upstream
Extend beyond forward upstream second in the whole length of part 17b and converge the outline (with reference to Fig. 6) of part 17b,
And leading edge 54f extends beyond upstream second and converges the distance of outline of part 17b from the midpoint court of cylinder array
Increase to left-hand side or downstream.It is to say, the place immediately downstream being positioned at air exit 18 of top exhaust water jacket 54
Part, as shown in plan view, be provided with from exhaust converge the part that the outline of part 17 significantly extends.
Therefore, top exhaust water jacket 54 cross-sectional area from the central point of upstream extremity (right-hand member) to cylinder array by
Cumulative add, and keep constant from the central point of cylinder array to region downstream, and corresponding to air exit 18
The cross-sectional area (width) of the part being at utmost exaggerated is kept substantially unanimously, thus presents viewed from above
Substantially rectangular profile.It is to say, the cross-sectional area of the top exhaust water jacket 54 of roughly planar is from correspondence
In the part of air exit 18 to coolant outlet 50b constant.The restriction of cylinder head converges part 17 from exhaust
Wall 45(Fig. 4 and Fig. 5 of part 54c of significantly highlighting of outline) more convex than aforementioned projection 41
Going out, the size of cylinder head 4 is then for minimizing.
Above-mentioned cooling water flowing in cylinder head jacket 50 will be below in reference to Figure 13 A and Figure 13 B and figure
14A and Figure 14 B is more specifically described.
With reference to Figure 13 A, relevant to cylinder head jacket 51 and lower exhaust water jacket 53, the cooling of cylinder head jacket 50
Water inlet 50a is formed in main water sleeve 51, and is used as the vertical connection of the coolant outlet of lower exhaust water jacket 53
Passage 55 is formed at the right-hand sections of the leading edge 53f of lower exhaust water jacket 53.Therefore, white as in Figure 13 A
Shown in look arrow, cooling water flows through main water sleeve 51 and lower exhaust water jacket 53 obliquely.
On the other hand, in the example being used for comparing shown in Figure 13 B, as the cooling of lower exhaust water jacket 53
The vertical communicating passage 55 of water out is adjacent to before the either side of air exit 18 is arranged on lower exhaust water jacket 53
On edge 53f, so that from the cooling water of the cooling water inlet 50a introducing of cylinder head jacket 50 towards a left side
The vertical communicating passage 55 of hand side flows, and from the cooling water inlet 50a corresponding to two right-hand side cylinder-bore 2
The cooling water introduced flows towards the vertical communicating passage 55 of right-hand side.Therefore, around being positioned in cylinder array
In the part of the air exit 18 at Dian, although there being higher heat concentration in this region, cooling water trends towards stopping
Stagnant.Therefore, poor cooling effect can be realized in the region.Additionally, the cooling effect of difference causes in this region
Activity boiling, it is known that activity boiling adjacent material is had corrosiveness.
On the contrary, in Figure 13 A illustrating present embodiment, cold from the cylinder-bore 2 corresponding to high order end
But the cooling water that water inlet 50a introduces flows through combustion chamber 6, enters in lower exhaust water jacket 53, then along bottom
The leading edge 53f flowing of exhaust water jacket 53.It is therefore prevented that cooling water is in the neighbouring midpoint being positioned at cylinder array
Stagnating in the region of air exit 18, high temperature may be born in this region, thus avoids owing to the boiling of cooling water causes
The risk of corrosion.
It is additionally, since vertical communicating passage 55 and is arranged on the right side of air exit 18 in the position of relative shift, can
To avoid the stagnation of the cooling water in the part between vertical communicating passage 55 and air exit 18, so that
Can must be advantageously cooled around the region of air exit 18.
It is described cooling down water flowing in top exhaust water jacket 54 referring to Figure 14 A and Figure 14 B.As above
Described, cooling water flows through to the left-hand side residing for coolant outlet 50b from the right-hand side residing for vertical communicating passage 55
Top exhaust water jacket 54.As by shown in the arrow in Figure 14 A, until the region on right side at midpoint of cylinder array
In, the width of plane top exhaust water jacket 54 is along with the flowing speed of the cooling water supplied by vertical communicating passage 55
The raising of rate and be gradually increased towards downstream, and start to become forward permanent from the part corresponding to air exit 18
Fixed.Therefore, as shown in the arrow in accompanying drawing, cooling water flowing velocity whole top exhaust water jacket 54 in substantially
Constant.
On the other hand, if plane top is vented the width of water jacket 54 along downstream direction from corresponding to being vented out
The part of mouth 18 starts to converge with exhaust the outline of part 17 and gradually decreases with being consistent, as shown in Figure 14 B,
Then narrow due to passage, cooling water speed in the region of leading edge 54f reduces, so that surround the most sudden and the most violent
The region of the air exit 18 being exposed under high temperature is poorly cooled down.
On the contrary, according to the present invention, as shown in Figure 14 A, except being configured to avoid the rear end of bolt-through hole 4e
Outward (Fig. 6), cooling water flows in the front portion of plane top exhaust water jacket 54 with even speed, and occurs without
Significantly stagnate.Therefore, the encirclement of the leading edge 54f of top exhaust water jacket 54 is especially exposed to the exhaust under high temperature
The part of outlet 18 can be cooled efficiently.
To more particularly below vertical communicating passage 55 be described now.As it is shown in figure 9, vertically connect
Passage 55 extends forward from the oval leading edge 54f of top exhaust water jacket 54.Such as Fig. 8, Figure 10 and Figure 11
Shown in, in lower exhaust water jacket 53, vertical communicating passage 55 is ellipse from the extension passage of lower exhaust water jacket 53
Circular contour highlights towards exhaust side surface 4d, the cartouche extending passage of lower exhaust water jacket 53 and exhaust
The outline converging part 17 is formed with being consistent.Vertical communicating passage 55 is less than from extending height prominent for passage 53d
Extend the passage 53d height along cylinder-bore axis.
When vertical communicating passage 55 highlights from extension passage 53d on the 4d of exhaust side surface, it is therefore prevented that lower exhaust
The cross-sectional area of the cooling-water duct between water jacket 53 and vertical communicating passage 55 reduces suddenly, so that cylinder head
The pressure loss in water jacket 50 minimizes.When vertical communicating passage 55 extends passage 53 as one portion by using
When dividing formation, the passage length of vertical communicating passage 55 can be minimized, and can ensure that from extending passage
The flow rate of the cooling water of 53d be enough to cool down the exhaust side surface 4d of cylinder head 4.
Figure 15 arrangement according to the invention and according to the layout of example for comparing between, in cylinder head jacket 50
In, at lower exhaust water jacket 53, vertical communicating passage 55, top exhaust water jacket 54 and coolant outlet 50b
The pressure loss is compared by place, and in the example for comparing, vertical communicating passage 55 is from extending passage 53d
Protrude.As from figure it should be understood that in the cylinder head jacket 50 according to the present invention, although at lower exhaust water
It is slightly larger that pressure loss ratio at set 53 and top exhaust water jacket 54 is used in the example compared, but vertical communicating passage
Whole pressure losses in 55 are much smaller than the pressure loss in the example for comparing, so that the pressure of whole water jacket
Power loss is significantly less than the pressure loss in the example for comparing.
Figure 16 shows that the flow rate of cooling water is with required according to the present invention and according to the example for comparing
Relation between the pump output pressure of cylinder head jacket 50, in the example for comparing, vertical communicating passage
55 from extending passage 53d protrusion.In this chart, block curve indicates the cylinder head jacket 50 according to the present invention,
Dashed curve instruction is for the example compared.The output characteristics of chain-dotted line curve instruction pump.Pump is with constant speed
7800rpm operates.As understood from Figure 16, the flow of cooling water speed of the example for comparing is only
120L/min, and the flow of cooling water speed of the present invention is 170L/min.
Therefore, by minimizing the whole pressure losses in cylinder head jacket 50, the cooling of cylinder head jacket 50 is flowed through
The flow rate of water can be maximized, and can effectively cool down cylinder head 4.
Second embodiment
Below with reference to Figure 18 and Figure 19, second embodiment of the present invention is described.At Figure 18 and Figure 19
In, the part corresponding to those parts in the first embodiment indicates by similar reference, without in phase
The written description answered carries out repeated description to these parts.
In this embodiment, as shown in figure 18, the cooling water inlet 50a of cylinder head jacket 50 is more preferably arranged
Air inlet side in each combustion chamber 6 or be arranged on the air inlet side of main water sleeve 51, reaches to become apparent from than the first embodiment
Degree.More specifically, the cooling water inlet 50a being arranged on exhaust side to be less than and/or less than being arranged on air inlet side
Cooling water inlet.It is to say, cooling water inlet 50a is towards the air inlet side skew of main water sleeve 51.Made herein
Cooling water inlet 50a " be preferably provided in air inlet side " or " towards air inlet side offset " statement represent be formed at into
The area of the cooling water inlet 50a of gas side is more than the area of the cooling water inlet being formed at exhaust side.
By forming cooling water inlet 50a by this way, as shown in figure 19, substantially from being formed at cylinder block water
Whole cooling water that before set 70, the cooling water inlet 70a of (exhaust) side introduces is towards air inlet side around cylinder-bore
The array flowing of 2, and via cylinder body-cylinder cap communicating passage 56(cooling water inlet 50a) flow into cylinder head jacket 50
Main water sleeve 51.Subsequently, it is perpendicular to the direction of cylinder array when cooling water in the forward position of inflow lower exhaust water jacket 53
When flowing through combustion chamber 6, cool down water cooling combustion chamber 6.The subsequent flowing of cooling water is identical with the first embodiment.
Therefore, by offseting cylinder body-cylinder cap communicating passage 56 towards the air inlet side of main water sleeve 51, it is introduced into cylinder head water
Most cooling water in set 50 flows through main water sleeve 51 towards lower exhaust water jacket 53, so that surround burning
Part (part surrounding combustion chamber 6 of cylinder block and the portion immediately above being positioned at combustion chamber 6 of cylinder head 4 of room 6
Point) can be cooled most effectively.When choosing this structure, preferably increase the area of cooling water inlet 70a,
Thus compared with the first embodiment, reduce the pressure loss.
Owing to the cooling water inlet 70a of block jacket 70 is arranged on exhaust side, and cylinder body-cylinder cap communicating passage 56
Offset towards the air inlet side of main water sleeve 51, therefore introduce the major part block jacket 70 from cooling water inlet 70a
Cool down the water array around cylinder-bore 2 before flowing into cylinder body-cylinder cap communicating passage 56 to flow, so that surround gas
The part of cylinder holes 2 can be cooled efficiently.Although cylinder body-cylinder cap communicating passage 56 offsets towards air inlet side, work as cylinder
Body-cylinder cap communicating passage 56 at regular intervals along cylinder array formed time, cooling water can be equal from main water sleeve 51
Cool down whole combustion chamber 6 evenly.
The amendment of embodiment
The present invention is illustrated by specific embodiment, but the embodiment that do not illustrated of the present invention
Limit, and can be changed in different parts in the case of without departing from the spirit of the present invention.Such as, aforementioned reality
Mode of executing is for automobile four valve in-line four cylinder petrol engine, but is applied equally to other classes for other purposes
The engine of type.In the foregoing embodiment, it is provided only with an air exit 18, but two can also be arranged
Air exit, each air exit is for two corresponding adjacent cylinders.
In the foregoing embodiment, exhaust water jacket 54 is held from corresponding to being partially toward of air exit 18 downstream at it
The part extended has and converges, from exhaust, part 54c that the outline of part 17 highlights, but can substitute for ground, under
Portion's exhaust water jacket 53 can be provided with such prominent part.In this case, main water sleeve 51 is vented with top
Water jacket 54 directly connects, and top is vented water jacket 54 connects with lower exhaust water jacket 53 and (accordingly act as bottom
Exhaust water jacket 53 cooling water inlet) vertical communicating passage 55 be arranged on lower exhaust water jacket 53 relative to
On the one end in cylinder array direction.Lower exhaust water jacket 53 also sets on its other end relative to cylinder array direction
It is equipped with coolant outlet.
And, in the foregoing embodiment, extend passage 53d and be provided for lower exhaust water jacket 53, in order to from this
Lower exhaust water jacket along exhaust converge the outside (that side on the exhaust side surface 4 of cylinder head 4) of part 17 to
Upper extension, but alternatively or additionally, extend passage and can be provided for top exhaust water jacket 54, in order to along
Exhaust converges the outside of part 17 from this top exhaust water jacket pendency.
Specific structure, layout, quantity and the angle of different parts can in the case of without departing from the spirit of the present invention with
Meaning amendment.And, it is shown that embodiment in engine all different parts the most not necessarily
, it may be necessary to it is removed.
Reference numerals list
1 engine
2 cylinder-bore
3 cylinder block
4 cylinder head
4d exhaust side surface
5 pistons
6 combustion chambers
16 exhaust ports
17 exhausts converge part
17a first converges part
Part is converged in 17b upstream second
Part is converged in 17c downstream second
18 air exits
44 stoppers (plug member)
50 cylinder head jacket
50a cooling water inlet
50b coolant outlet
51 main water sleeves
53 lower exhaust water jackets
53d extends passage
54 top exhaust water jackets
55 vertical passageways
56 cylinder bodies-cylinder cap communicating passage
62 first water sleeve type core print seats
63 second water sleeve type core print seats
64 core prints
64a core print bottom
64b core print top
70 block jacket
70a cooling water inlet
Claims (9)
1., for a cooling structure for explosive motor, this explosive motor includes the cylinder limiting an exhaust cylinder holes
Body and be arranged on the cylinder head on the top surface of described cylinder block, described cylinder head be slidably received in
The top surface cooperation of the piston in each cylinder-bore and limit combustion chamber, described cylinder head and the interior part of described cylinder block
Do not limit the cylinder head jacket and block jacket being interconnected, it is characterised in that:
The exhaust that is internally provided with of described cylinder head converges part and multiple exhaust ports, and each exhaust port is respectively provided with court
To the upstream extremity that corresponding combustion chamber is uncovered, described exhaust converges part and is converged by the plurality of exhaust port, and institute
State exhaust and converge the air exit that the longitudinally central portion of the side surface being partly comprised in described cylinder head is uncovered；And
Described cylinder head jacket includes covering from above the main water sleeve of described combustion chamber, covers described exhaust from below and converge
Part lower exhaust water jacket, and cover from above described exhaust converge part top exhaust water jacket, described main water
Set is provided with the multiple cooling water inlets arranged around each cylinder-bore, and described main water sleeve and described lower exhaust water jacket
Connect with an exhaust water jacket in described top exhaust water jacket；
Wherein, the vertical passageway that described lower exhaust water jacket and described top exhaust water jacket communicate with each other is arranged on described
Lower exhaust water jacket and described top exhaust water jacket in another exhaust water jacket with in lower part, this part is from institute
The position corresponding to described air exit stating another exhaust water jacket offsets along cylinder array direction towards side, and uses
Coolant outlet in another exhaust water jacket described be arranged on another exhaust water jacket described with in lower part, this
Part is vented the position corresponding to described air exit of water jacket along described cylinder array direction towards separately from described another
Side offsets.
Cooling structure for explosive motor the most according to claim 1, wherein, with described cylinder block water
The described cooling water inlet of the described main water sleeve of set connection is arranged on the air inlet side of described main water sleeve.
Cooling structure for explosive motor the most according to claim 2, wherein, described block jacket
Cooling water inlet be arranged on the exhaust side of described cylinder block.
Cooling structure for explosive motor the most according to claim 1, wherein, by described lower exhaust
The described vertical passageway that water jacket and described top exhaust water jacket communicate with each other is formed by independent plug member Guan Bi
Casting cavity.
Cooling structure for explosive motor the most according to claim 1, wherein, described lower exhaust water
Set and described top exhaust water jacket at least one exhaust water jacket be provided with extension passage, this extension passage from described to
The outside that the outward flange of a few exhaust water jacket converges part along described exhaust extends, and described vertical passageway is arranged
In described extension passage.
Cooling structure for explosive motor the most according to claim 5, wherein, described vertical passageway to
Extend beyond outward the outline of described extension passage.
Cooling structure for explosive motor the most according to claim 5, wherein, described extension passage sets
Put in one exhaust water jacket.
Cooling structure for explosive motor the most according to claim 1, wherein, one exhaust water
Set is described lower exhaust water jacket.
Cooling structure for explosive motor the most according to claim 1, wherein, described vertical passageway and
Described coolant outlet is separately positioned on the substantially end of another exhaust water jacket described relative to described cylinder array direction
In end portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-013484 | 2013-01-28 | ||
| JP2013013484A JP6055322B2 (en) | 2013-01-28 | 2013-01-28 | Cooling structure for internal combustion engine and method for manufacturing internal combustion engine having the cooling structure |
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| CN103967577A CN103967577A (en) | 2014-08-06 |
| CN103967577B true CN103967577B (en) | 2016-09-07 |
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| CN201410039866.3A Active CN103967577B (en) | 2013-01-28 | 2014-01-27 | Cooling structure for explosive motor |
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| JP (1) | JP6055322B2 (en) |
| CN (1) | CN103967577B (en) |
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| DE102015202491B4 (en) * | 2015-02-12 | 2022-03-24 | Bayerische Motoren Werke Aktiengesellschaft | Coolant jacket for a cylinder head of an internal combustion engine |
| JP6577592B2 (en) * | 2015-10-23 | 2019-09-18 | 本田技研工業株式会社 | Cylinder head water jacket structure |
| JP6475360B2 (en) * | 2015-10-23 | 2019-02-27 | 本田技研工業株式会社 | Cooling structure for water-cooled engine |
| DE112015007043T5 (en) * | 2015-10-23 | 2018-07-26 | Honda Motor Co., Ltd. | CYLINDER HEAD WATER COAT STRUCTURE |
| JP6747029B2 (en) * | 2016-04-14 | 2020-08-26 | 三菱自動車工業株式会社 | Engine cylinder head |
| DE102017202154A1 (en) * | 2017-02-10 | 2018-08-16 | Ford Global Technologies, Llc | Charged liquid-cooled internal combustion engine |
| DE112018001117A5 (en) * | 2017-03-03 | 2019-11-21 | Avl List Gmbh | Liquid-cooled internal combustion engine |
| JP6971291B2 (en) | 2019-11-27 | 2021-11-24 | 本田技研工業株式会社 | Multi-cylinder internal combustion engine |
| JP7442355B2 (en) * | 2020-03-17 | 2024-03-04 | 本田技研工業株式会社 | Cylinder head of multi-cylinder engine |
| DE102020123021A1 (en) | 2020-09-03 | 2022-03-03 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine for a motor vehicle, in particular for a motor vehicle |
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2013
- 2013-01-28 JP JP2013013484A patent/JP6055322B2/en active Active
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2014
- 2014-01-24 DE DE201410201338 patent/DE102014201338A1/en not_active Withdrawn
- 2014-01-27 CN CN201410039866.3A patent/CN103967577B/en active Active
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| US5720240A (en) * | 1995-11-15 | 1998-02-24 | Mercedes-Benz Ag | Liquid cooled cylinder head |
| US6202603B1 (en) * | 1997-05-30 | 2001-03-20 | Ab Volvo | Internal combustion engine |
| CN1386965A (en) * | 2001-05-17 | 2002-12-25 | 本田技研工业株式会社 | Water-cooled IC engine |
| CN101466936A (en) * | 2006-08-28 | 2009-06-24 | 丰田自动车株式会社 | Cooling water passage structure of cylinder head |
| CN101440755A (en) * | 2007-11-19 | 2009-05-27 | 通用汽车环球科技运作公司 | Turbocharged engine cylinder head internal cooling |
| CN102072040A (en) * | 2009-11-19 | 2011-05-25 | 本田技研工业株式会社 | Cooling structure for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103967577A (en) | 2014-08-06 |
| JP6055322B2 (en) | 2016-12-27 |
| DE102014201338A1 (en) | 2014-07-31 |
| JP2014145284A (en) | 2014-08-14 |
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