CN103967577A - Cooling structure for an internal combustion engine - Google Patents
Cooling structure for an internal combustion engine Download PDFInfo
- Publication number
- CN103967577A CN103967577A CN201410039866.3A CN201410039866A CN103967577A CN 103967577 A CN103967577 A CN 103967577A CN 201410039866 A CN201410039866 A CN 201410039866A CN 103967577 A CN103967577 A CN 103967577A
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- Prior art keywords
- exhaust
- water jacket
- cylinder head
- cylinder
- jacket
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Classifications
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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
- F02F1/26—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
Abstract
The invention relates to a cooling structure for an internal combustion engine. In the internal combustion engine which has a cylinder head (4) that defines an exhaust merging portion (17) inside, a region which surrounds an exhaust gas outlet (18), which is defined in a longitudinal center on an exhaust side of the cylinder head, is appropriately cooled without increasing the required amount of cooling water or the size of the cylinder head. The cylinder head is provided therein with a main water jacket (51) covering a combustion chambers from the top, and a lower and an upper exhaust water jacket (53, 54) each covering the exhaust merging part from below and above, with the main water jacket provided with multiple cooling water intakes (50) surrounding respective cylinder bores and being communicated with the lower exhaust water jacket. A vertical passage (55) communicated with the two exhaust water jackets is provided in a part of the other exhaust water jacket, which is offset from a position thereof corresponding to the exhaust gas outlet in a cylinder row direction to one side.
Description
Technical field
The present invention relates to a kind of cooling structure for explosive motor, this cooling structure has the exhaust limiting in its cylinder head and converges part.
Background technique
In traditional multicylinder engine, a plurality of air inlet ports and exhaust port are limited in cylinder head, make them uncovered on air inlet side surface and the exhaust side surface of cylinder head respectively, and for distributing the intake manifold of air inlet and being attached to respectively the air inlet side surface of cylinder head and exhaust side surface for converging the gas exhaust manifold of exhaust.Recently, for converging the exhaust of exhaust, converge part and be sometimes limited in cylinder head, thereby make independent outlet pipe be connected to the exhaust side surface of cylinder head.
Exhaust in having the cylinder head of being limited at converges in the multicylinder engine of part, owing to there not being outside gas exhaust manifold, so the overall dimensions of motor can be reduced, and can obtain extra advantage:, reduce the thermal loss that the exhaust due to releasing heat causes; And accelerate the heating to emission control system, to activate catalyzer wherein.In addition, the distance of converging between the outlet end of part due to each firing chamber and exhaust reduces, so be equipped with while providing the pressurized machine (turbosupercharger) of power by exhaust stream when motor, can improve the response characteristic of pressurized machine.On the other hand, the thermal degradation of the catalyzer causing for fear of the excessive lifting of temperature that may be by exhaust and/or act on motor and outlet pipe on thermal stress, may need exhaust suitably cooling.
Cooling structure as the cylinder head for multicylinder engine, known be formed for covering from top top exhaust water jacket that exhaust converges part, for from below, cover exhaust converge the bottom exhaust water jacket of part and be positioned at the both sides of exhaust outlet for being communicated with a pair of vertical passageway of top exhaust water jacket and bottom exhaust water jacket, aforementioned exhaust outlet is arranged on the midpoint of cylinder head with respect to cylinder array direction.With reference to JP2008-309158.
Also known, for a pair of vertical communicating passage that top exhaust water jacket and bottom exhaust water jacket are communicated with each other, be arranged on the structure on the both sides of exhaust outlet therein, cooling water flows along cylinder array direction in whole cylinder head jacket, and cylinder head jacket comprises from the main water sleeve of covering firing chamber, top.With reference to US7784442.
According to another conventional layout again, for making cooling water as a whole along the mobile structure of cylinder array direction, cooling water flow be divided into for the main flow of main water sleeve and for exhaust water jacket time stream, these two current converge in coupling, and coupling is by the independent component limit that is attached to one end with respect to cylinder array direction of cylinder head.With reference to JP4337851B.
When as the same with the situation in US7784442 in JP2008-309158, when cooling water passage is constructed such that cooling water flows along cylinder array direction, for the entrance and exit of cooling water, be arranged on the relative axial end portion of passage.Yet the cross sectional area of cooling water passage is broadened in the region that surrounds exhaust outlet, thereby makes the flowing velocity of cooling water in this region less, this makes the cooling impaired of this region.When vertical passageway is arranged on the both sides of exhaust outlet, cooling water can be along exhaust outlet two side flow, but due to the flow stagnation of cooling water in the upper and lower of exhaust outlet, so surround the part of exhaust outlet may not can by cooling fully, thereby make for the mounting surface of venting gas appliance being installed or for the mounting surface of the connecting tube of venting gas appliance is installed, thermal distortion may occurring.
On the other hand, if as advised in JP4337851B, from the cooling water flow that converges part for coolant exhaust of exhaust side water jacket, be from the branch of main flow that is placed on the main water sleeve of firing chamber top, the part of surrounding exhaust outlet is cooled and is water-cooled to specific degree, cooling water flows into and suffers compared with in the exhaust side water jacket of small flow resistance, yet, around the flow rate of the cooling water of exhaust outlet, be not very abundant.In order to ensure the sufficient flow rate of cooling water, need further to increase the amount of the cooling water of circulation, and need to increase the volume of cooling water and therefore increase the size of cylinder head.
Summary of the invention
The problems referred to above that the present invention be directed to prior art are made, and its main purpose is, a kind of cooling structure for explosive motor is provided, this explosive motor is equipped with the inner cylinder head that exhaust converges part that limits, this allows to surround exhaust and converges part partly by cooling fully, and also therefore increases the size of cylinder head without the volume that increases cooling water.
According to the present invention, this object can be by providing a kind of cooling structure for explosive motor to realize, this explosive motor comprises the cylinder head 4 on the top surface that limits the cylinder block 3 in an exhaust casing hole 2 and be arranged on described cylinder block, described cylinder head limits firing chamber 6 with being slidably received in the top surface cooperation of the piston 5 in each cylinder-bore, the inside of described cylinder head and described cylinder block limits respectively cylinder head jacket 50 and the block jacket 70 being interconnected, it is characterized in that: the inside of described cylinder head is provided with exhaust and converges part 17 and a plurality of exhaust port 16, each exhaust port all has towards the uncovered upstream extremity in corresponding firing chamber, described exhaust converges part described a plurality of exhaust ports is converged, and described exhaust converges the uncovered exhaust outlet 18 of longitudinal intermediate portion that part 17 is included in the side surface of described cylinder head, and described cylinder head jacket comprise from top, cover the main water sleeve 51 of described firing chamber, from below, cover described exhaust converge part bottom exhaust water jacket 53, and from top, cover described exhaust converge part top exhaust water jacket 54, described main water sleeve is provided with a plurality of cooling water inlet 50a that arrange around each cylinder-bore, and described main water sleeve is communicated with an exhaust water jacket in described bottom exhaust water jacket and described top exhaust water jacket, wherein, the vertical passageway 55 that described bottom exhaust water jacket and described top exhaust water jacket are communicated with each other is arranged in the following part of another exhaust water jacket in described bottom exhaust water jacket and described top exhaust water jacket, this part is moved towards a lateral deviation along cylinder array direction from the position corresponding to described exhaust outlet of described another exhaust water jacket, and for the coolant outlet 50b of described another exhaust water jacket, be arranged on the following part of described another exhaust water jacket, this part is offset towards opposite side along described cylinder array direction from the position corresponding to described exhaust outlet of described another exhaust water jacket.
According to this, arrange the cooling water that the is introduced into main water sleeve cylinder-bore of flowing through obliquely towards vertical passageway in a described exhaust water jacket.Therefore,, even if a described exhaust water jacket is provided with the width narrowing down gradually towards exhaust outlet, cooling water also can gently flow along the region that surrounds exhaust outlet.Subsequently, cooling water flows in described another exhaust water jacket via vertical passageway, and from one end of described another exhaust water jacket, flows to its other end with respect to cylinder array direction.This created with a described exhaust water jacket opposite direction on along the mobile cooling water flow of exhaust outlet.Therefore, allow cooling water gently to flow through whole exhaust water jacket and prevent the stagnation in the region that surrounds exhaust outlet, thereby making cylinder head, especially surrounding the region of exhaust outlet, can be by advantageously cooling.
The described cooling water inlet of the described main water sleeve 51 being communicated with described block jacket 70 according to an aspect of the present invention, is preferentially arranged on the air inlet side of described main water sleeve.
Therefore, allow the most of cooling water oblique flow of cooling water of cylinder-bore that participates in flowing through, can be by especially advantageously cooling thereby make to surround the region of exhaust outlet.
Preferably, except the cooling water inlet of main water sleeve is preferentially arranged on air inlet side, also the cooling water inlet 70a of block jacket 70 is arranged on to the exhaust side of cylinder block.Therefore, allow cooling water in cylinder block before the cooling water inlet of main water sleeve of flowing through, the cylinder-bore of flowing through, thus make cooling water be effectively used to the cooling of cylinder block and head.
According to the preferred embodiment of the present invention, the vertical passageway 55 that bottom exhaust water jacket and top exhaust water jacket are communicated with each other is formed by the casting cavity of plug member 44 closures independently.
Therefore, for supporting the core print of casting core, can be used to form this vertical passageway, aforementioned casting core is used to form top exhaust water jacket and/or bottom exhaust water jacket, thereby can simplify the manufacture process of motor.
According to a further aspect in the invention, at least one exhaust water jacket in described bottom exhaust water jacket 53 and described top exhaust water jacket 54 is provided with and extends passage 53d, this extension passage converges the outside extension of part from the outward edge of described at least one exhaust water jacket along described exhaust, and described vertical passageway 55 is arranged in described extension passage.
According to this, arrange the bearing from such as pressurized machine, Exhaust gas purifying device and can be by effectively cooling for a side of the heat of the venting gas appliance of the connecting tube of this device of cylinder head.And, the effective length that allows to reduce vertical passageway that arranges of extending passage, this also contributes in the situation that do not increase the flow rate that the volume of whole engine water jacket increases cooling water.In addition, by vertical passageway 55 being stretched out or expanding, exceed the external frame that extends passage, the cooling water vertical passageway of can more gently flowing through.
According to especially preferred mode of execution of the present invention, described extension passage 53d is arranged in a described exhaust water jacket.Preferably, a described exhaust water jacket is described bottom exhaust water jacket 53.
According to of the present invention another preferred embodiment, described vertical passageway 55 and described coolant outlet 50b are separately positioned in the roughly end portion of described another exhaust water jacket 54 with respect to described cylinder array direction.Therefore, the resistance of flow of cooling water is minimized, and the cooling effect of cooling water is maximized.
According to the cooling structure for motor provided by the present invention, surround the exhaust be limited in cylinder head converge the part of part can be by cooling fully, and without increasing the demand of cooling water or the size of cylinder head.
Accompanying drawing explanation
Fig. 1 is the front view of the motor that provides as the first mode of execution of the present invention;
Fig. 2 is the sectional drawing along the motor of the cutting line II-II intercepting of 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 worm's eye view of the cylinder head shown in Fig. 1;
Fig. 7 is the sectional drawing along the amplification of the motor of the cutting line VII-VII intercepting of Fig. 5;
Fig. 8 is the sectional drawing along the amplification of the motor of the cutting line VIII-VIII intercepting of Fig. 5;
Fig. 9 is the stereogram for the first and second water jacket casting cores of the first mode of execution;
Figure 10 is the face upwarding stereogram of disassembling of the casting core shown in Fig. 9;
Figure 11 is the front view of the casting core shown in Fig. 9;
Figure 12 looks the mobile figure describing of the cooling water in the motor shown in Fig. 1;
Figure 13 A and Figure 13 B look the mobile figure describing of the cooling water in the bottom exhaust water jacket shown in Fig. 9;
Figure 14 A and Figure 14 B look the mobile figure describing of the cooling water in the top exhaust water jacket shown in Fig. 9;
Figure 15 is by the pressure loss in the different piece of the water jacket in the cylinder head shown in Figure 12 and the chart comparing for example relatively;
Figure 16 is by the flow rate in the different piece of the water jacket in the cylinder head shown in Figure 12 and the chart comparing for example relatively;
Figure 17 is the worm's eye view of the cylinder head that provides as the mode of execution of revising;
Figure 18 is the worm's eye view of the cylinder head that provides as the second mode of execution;
Figure 19 looks the mobile figure describing of the cooling water in the second mode of execution;
Figure 20 is the front view as the motor being presented for example relatively;
Figure 21 is the sectional drawing along the cutting line XXI-XXI intercepting of Figure 20 as the motor being presented for example relatively; And
The front view of the casting core of Figure 22 cylinder head that to be the conduct shown in Figure 20 provide for example relatively.
Embodiment
Below with reference to accompanying drawings, to implementing automobile internal motor of the present invention (motor 1), describe.
The first mode of execution
As depicted in figs. 1 and 2, motor 1 is mainly comprised of DOHC tetra-valve in-line four cylinder motors, and comprise and limit four cylinder block 3 of arranging cylinder-bore 2 in a row, and the box-like cylinder head 4 that is attached to the upper surface of cylinder block 3, this cylinder head is extended perpendicular to cylinder-bore 2.Cylinder block 3 and cylinder head 4 are made by pack alloy.
In the following description, suppose that motor is orientated to the axis (cylinder-bore axis) that makes each cylinder-bore 2 and extends along vertical vertical direction, and the exhaust side face forward of the motor 1 of laterally placing.Yet in the time of on being installed in vehicle, the actual orientation of motor 1 is not subject to this example limits.In the following description, for convenience of description, vertical direction and the fore-and-aft direction arrow in Fig. 2 of this orientation based on motor 1 limits.For example, cylinder block 3 is positioned at cylinder head 4 belows.The direction of travel of the horizontal direction of the arrow indication in Fig. 1 based on the vehicle of motor 1 is installed.
Each cylinder-bore 2 is slidably received piston 5, and firing chamber 6 is limited at the top surface of piston 5 and the bottom surface (towards the surface of below) that limited with respect to the fitting surface 4a of cylinder block 3 by cylinder head 4 between.In the mode of execution illustrating, the interface horizontal-extending between cylinder head 4 and cylinder block 3, although and do not illustrate in the drawings, the packing ring of constructing 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 is received from the lubricant oil of top drippage.Cylinder block 3 and food tray are defined for the crankcase of the bent axle that receiving do not illustrate in the drawings jointly.The upper end of cylinder head 4 is attached with valve mechanism cover (not shown), makes for receiving the valve actuation chamber 9 of valve actuating mechanism 8 jointly to be limited by cylinder head 4 and valve mechanism cover.That is to say, the upper surface of the diapire of cylinder head 4 limits the bottom surface 9a in valve actuation chamber 9.
A pair of suction valve 10 and a pair of outlet valve 11 are slidably kept by the cylinder head 4 of each cylinder.Admission cam shaft (not shown), intake rocker 12, exhaust cam shaft 13 and exhaust rocker arm 14 are received in valve actuation chamber 9.By the valve actuation mechanism 8 being formed by these parts, suction valve 10 and outlet valve 11 are activated by bent axle or are opened and closed by bent axle.
The inside of cylinder head 4 is provided with a pair of air inlet port 15 and a pair of exhaust port 16, and air inlet port is opened and closed by the corresponding air intake valve 10 of each cylinder, and exhaust port is opened and closed by the corresponding drain tap 11 of each cylinder.Each air inlet port 15 has upstream extremity and downstream, and upstream extremity is uncovered at the air inlet side surface 4c place of rear side that is limited at cylinder head 4, and downstream is led to corresponding firing chamber 6.Each exhaust port 16 has upstream extremity and downstream, and upstream extremity leads to corresponding firing chamber 6, and downstream and other exhaust port 16 converge.More specifically, for converging the exhaust of exhaust port 16, converge part 17(with reference to Fig. 6) be limited at cylinder head 4.As shown in Figures 4 and 5, exhaust converges part 17 and has the exhaust outlet 18 that is positioned at its downstream, and this exhaust outlet 18 is uncovered at the longitudinal intermediate portion of exhaust side surface 4d of front side that is limited at cylinder head 4.
As shown in Figures 1 and 2, the pressurized machine (turbosupercharger) 19 that is connected to the downstream of exhaust outlet 18 is by using bolt 20 to be directly installed on the exhaust side surface 4d of cylinder head 4.Pressurized machine 19 is provided with turbo machine 23 and compressor 24, and the two is by for receiving the middle casing 22 of the rotor shaft 21 that laterally (level) extends to connect.
Turbo machine 23 comprises turbine cylinder 25, exhaust inlet pipe 26 and outlet flange 27, turbine cylinder is received the turbine rotor (not shown) of the right-hand member that is attached to rotor shaft 21, exhaust inlet pipe extends back from the rear surface of turbine cylinder 25 and at its free end, has an entrance flange 26a that limits exhaust entrance, and outlet flange is formed in the right lateral surface of turbine cylinder 25 to limit exhaust outlet 27a.
Compressor 24 comprises compressor housing 28, entrance flange 29 and air inlet outer pipe 30, compressor housing is received the compressor drum (not shown) of the left end that is attached to rotor shaft 21, entrance flange is arranged in the left-hand face of compressor housing 28 to limit entrance, and air inlet outer pipe is from the bottom surface of compressor housing 28 to downward-extension and have and be formed on its free end to limit the outlet flange 30a of air inlet outlet.
Turbo machine 23 is positioned at the place, the neutral position intermediate point of four cylinder-bore 2 (or be positioned at) of cylinder head 4 with respect to the direction of cylinder array.Compressor 24 is positioned at the left-hand side of cylinder head 4.The exhaust outlet 27a of turbo machine 23 is centered close to rotor shaft 21 tops, and the interface of the axis of this rotor shaft substantially and between cylinder head 4 and cylinder block 3 is positioned on sustained height.Therefore, the top of the fitting surface 4a that is centered close to cylinder head 4 of the exhaust outlet 27a of turbo machine 23.As a result, in the place ahead of motor, the below of the exhaust outlet 27a of turbo machine 23, limits relatively large space.
This space holds exhaust gas cleaning device 31, and this exhaust gas cleaning device is connected to the downstream of turbo machine 23.Exhaust gas cleaning device 31 comprises: triple-effect catalytic unit 32, and this triple-effect catalytic unit has the axis to downward-extension in the mode that tilts to the left that flows that is parallel to exhaust; Exhaust inlet pipe 33, this exhaust inlet pipe is crooked left to be extended along direction obliquely in the mode being tilted to the right from the upper surface (this upper surface is downward-sloping towards right side) of triple-effect catalytic unit 32 before entering substantially horizontal, and this exhaust inlet pipe is provided with entrance flange 33a(at its free end and limits exhaust entrance); Exhaust exit pipe 34, this exhaust exit pipe is from the lower end of triple-effect catalytic unit 32 to downward-extension.Exhaust gas cleaning device 31 is the place ahead in cylinder block 3 along this orientation positions, and entrance flange 33a is secured to the outlet flange 27 of turbo machine 23.
As 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) is provided with Fig. 2 for block jacket 70() cooling water inlet 70a.
As shown in Figure 6, exhaust converges part 17 and comprises: four first are converged part 17a, and each first converges part and converge two exhaust ports 16 of corresponding firing chamber 6; Part 17b is converged in a pair of upstream second, and these upstreams second are converged part and by first of two right sides, converged part 17a respectively and merge together, and by first of two left sides, converges part 17a and merge together; And downstream second converges part 17c, this downstream second is converged part and part 17b is converged in two upstreams second is merged together, and at its exit region, has the cross section of constant.Exhaust converges the planimetric map external frame that part 17 is provided with 6 convergents from firing chamber, thereby prevents that 6 exhausts of discharging flow into the exhaust port of adjacent firing chamber 6 from each firing chamber, and therefore reduces exhaust resistance.
Yet the first major part of converging part 17a is formed in the region corresponding to the fitting surface 4a of cylinder head 4, seen at worm's eye view (Fig. 4); Upstream second converges part 17b and the place ahead that part 17c is positioned at the fitting surface 4a of cylinder head 4 is converged in downstream second.That is to say, the antetheca of cylinder head 4 is outstanding forward from cylinder block 3, therefore forms the portion of dangling.
The restriction of the antetheca of cylinder head 4 first converges part 17a and upstream second and converges the part of part 17b and limit cartouche, and wherein intermediate portion is outstanding more than end.The part that part 17c is converged in the restriction downstream second of cylinder head 4 forms tube, and this tube converges the part of part 17b and gives prominence to forward (at exhaust side surface 4d) from limiting upstream second.From cylinder block 3 is outstanding, to limit first, converges part 17a, upstream second and converge part 17b and downstream second and converge the portion of dangling of part 17c and will be called as in the following description projection 41.According to this structure, projection 41 can only limit the part that exhaust converges part 17.For example, first converges the part that part 17a or this first converge part can be limited in cylinder head 4 by inside suitably, and the part that even part 17b is converged in upstream second also can be suitably limited in cylinder head 4.In projection 41, the part that part 17c is converged in restriction downstream second will be called as exhaust outlet tubulose portion 42.
At the fitting surface 4a place of cylinder head 4, for receiving ten position openings on the outside between every pair of adjacent firing chamber 6 and in each end firing chamber 6 of the bolt-through hole 4e of bolt (not shown) that cylinder head 4 is fastened to cylinder block 3.In addition, at the fitting surface 4a place of cylinder head 4, a plurality of cooling water inlet 50a(Fig. 2 of cylinder head jacket 50) roughly at regular intervals around four cylinder-bore 2(firing chambers 6) whole all sides form (thereby make the region of the combination of cooling water inlet 50a, for each cylinder-bore 2, being identical substantially).
As shown in Figures 3 to 5, exhaust outlet tubulose portion 42 is inclined upwardly away from firing chamber 6, and in its tail end, has for connecting the attachment face 42a of pressurized machine 19.Attachment face 42a is with respect to cylinder-bore axis be inclined upwardly (towards vertical surface above).
Because exhaust outlet tubulose portion 42 constructs in mode as shown in Figure 2, so being connected to the pressurized machine 19 of exhaust outlet 18 can be spaced apart with cylinder head 4 and cylinder block 3 with the Exhaust gas purifying device 31 that is connected to its downstream, and without increasing the distance between firing chamber 6 and pressurized machine 19 or also therefore increasing the size of cylinder head 4 without extending exhaust outlet tubulose portion 42.Therefore, prevented the temperature of the excessive lifting cylinder lid 4 of heat of pressurized machine 19 and Exhaust gas purifying device 31.
On the other hand, as can be the example for comparing as shown in Figure 20 and Figure 21 found out, if exhaust outlet tubulose portion 42 extends forward perpendicular to cylinder-bore axis, for pressurized machine 19 is spaced apart with cylinder head 4 and cylinder block 3, exhaust outlet tubulose portion 42 must be extended, thereby have to increase the size of cylinder head 4, and the length of the increase of the exhaust passage between firing chamber 6 and pressurized machine 19 has hindered the response performance of pressurized machine 19.
With contrary for example relatively, according to the present invention, due to the acclivitous structure of exhaust outlet tubulose portion 42, pressurized machine 19 can be in the situation that not increase the size of cylinder head 4 spaced apart with cylinder head 4.And, by exhaust outlet tubulose portion 42 is inclined upwardly, pressurized machine 19 can be placed on respect to the relatively high position for example relatively shown in Figure 21, thereby has improved Exhaust gas purifying device 31(Fig. 1 of the downstream that is connected to pressurized machine 19) performance.
More specifically, as depicted in figs. 1 and 2, the Exhaust gas purifying device 31 that is connected to the exhaust entrance 27a of turbo machine 23 is bent downwardly by exhaust inlet pipe 33, and tilts by triple-effect catalytic unit 32, thereby has guaranteed the suitable performance of triple-effect catalytic unit 32.If pressurized machine 19 is as Figure 20 and the same layout of example for comparing as shown in Figure 21, when the exhaust entrance 27a of turbo machine 23 is positioned at lower position, for the triple-effect catalytic unit 32 with identical performance is placed in identical space, have to increase the inclination angle of triple-effect catalytic unit 32, thereby reduced the layout degrees of freedom of other supplementary equipment, and had to the curvature of exhaust inlet pipe 33 to be increased to the smooth and easy degree that flows and hindered that makes exhaust.That is to say, in order to improve the smooth and easy of exhaust when guaranteeing the suitable layout degrees of freedom of supplementary equipment, flow, have to reduce the performance of triple-effect catalytic unit 32.Yet, by exhaust outlet tubulose portion 42 is inclined upwardly, make exhaust air flow Uniform Flow in catalyst converter, thereby avoided the localized degradation of catalyzer by reducing the bend angle of exhaust inlet pipe 33, and can increase the performance of Exhaust gas purifying device 31.
Referring again to Fig. 3 to Fig. 5, the free end of exhaust outlet tubulose portion 42 is provided with four fastening boss 43 around exhaust outlet 18, for pressurized machine 19 is fastened thereon.Two in fastening boss 43 are positioned at exhaust outlet 18 tops, and from exhaust outlet lateral shift, all the other two in fastening boss are positioned at exhaust outlet 18 belows, and from exhaust outlet lateral shift.
As shown in Figures 2 and 3, the inside of cylinder head 4 is provided with the cylinder head jacket 50 for cooling air cylinder cap 4.Cylinder head jacket 50 comprises that being arranged on exhaust converges the bottom exhaust water jacket 53 of part 17 belows and be arranged on the top exhaust water jacket 54 that exhaust converges part 17 tops.
The mounting structure of pressurized machine 19 will be introduced below.As shown in Figures 2 and 3, fastening boss 43 connects integratedly with wall 46, and wall 46 is separated valve actuation chamber 9 and top exhaust water jacket 54.For the object of lightweight and compact design, this wall is less than fastening boss 43 on thickness, thereby the fastening boss 43 in top is protruding in top exhaust water jacket 54 and valve actuation chamber 9.
Because the fastening boss 43 in top is protruding in top exhaust water jacket 54 and valve actuation chamber 9, and be especially protruding in top exhaust water jacket 54, therefore the fastening boss 43 in top is cooled in effective mode, thereby can avoid the infringement to the sealability of the part around exhaust outlet 18.Because the fastening boss 43 in top is protruding in valve actuation chamber 9, prevented the interference in 43 pairs of valve actuation chambeies 9 of fastening boss, top, in the situation that do not increase the size permission of cylinder head 4, pressurized machine 19 is placed on to higher position simultaneously.
As shown in Figure 6 and Figure 7, the fastening boss 43 in bottom is formed in the free end of lower wall 42b of exhaust outlet tubulose portion 42.Due to the object for lightweight and compact design, lower wall 42b is also less than fastening boss 43 on thickness, so the fastening boss 43 in bottom protrudes from the lower surface of exhaust outlet tubulose portion 42.The fastening boss 43 in bottom vertically extends with respect to the mounting surface 42a of pressurized machine 19.Therefore, as from below, (Fig. 6) sees, the fastening boss in bottom 43 extends along directions forward and backward, and its rear end is with respect to direction forward and backward, is positioned at the place, neutral position of the lower wall 42b of exhaust outlet tubulose portion 42.That is to say, fastening boss 43 only extends to the free end of projection 41, and the base portion distolateral (this part limits upstream second and converges part 17b) that does not extend to projection 41 is to be the outstanding cylinder block 3 that surpasses of the portion's form of dangling.
As shown in Figure 6, the lower surface of projection 41 is formed with pair of ribs 47, and this pair of ribs extends to corresponding fastening boss 43 from cylinder head 4 with the peripheral part of fitting surface 4a cylinder block 3 boundaries.These flanks 47 extend or with towards extending with the mode away from cylinder array along directions forward and backward, and when they extend to and cylinder head 4 depart from each other during with fitting surface 4a cylinder block 3 boundaries from fastening boss 43.
As mentioned above, pressurized machine 19 and Exhaust gas purifying device 31 are arranged in the front of cylinder block 3 and cylinder head 4, thereby make these devices be heated to higher temperature after ato unit 1.Give prominence to the projection 41 that surpasses cylinder block 3, be in particular the lower surface of projection, by conduction, radiation and convection current, bear the heat of automatic pressure intensifier 19 and Exhaust gas purifying device 31.When the lower surface of projection 41 is during by superheating, the thermal distortion of caused projection 41 may cause adverse effect to the sealing between cylinder head 4 and pressurized machine 19.Yet in the mode of execution illustrating, the flank 47 being formed on the lower surface of projection 41 extends away from cylinder array, thereby prevented the distortion of projection 41.
Because pressurized machine 19 and Exhaust gas purifying device 31 are attached to the projection 41 of cylinder head 4, the load acting on projection 41 at high temperature can cause the distortion of projection 41.Yet, because flank 47 extends to the fastening boss 43 in bottom from the peripheral part of the fitting surface 4a of the cylinder head 4 that supported by cylinder block 3, flank 47 and fastening boss 43 cooperations as beam, effectively improved the rigidity of projection 41, thereby prevented on the whole the distortion of projection 41.
Owing to being formed on two flanks 47 on the lower surface of projection 41, from being formed on the fastening boss 43 in bottom of both sides of exhaust outlet tubulose portion 42, towards cylinder head 4, the fitting surface 4a with respect to cylinder block 3 extends to depart from each other, these two flanks 47 have not only prevented the bending deflection of exhaust outlet tubulose portion 42 effectively, but also have effectively prevented its torsional deflection.
As modification, flank 47 can be configured to the form shown in Figure 17.In the mode of execution of this modification, along with two flanks 47 that extend from two fastening boss 43 in bottom extend towards the fitting surface 4a with cylinder block 3 boundaries of cylinder head 4, these two flanks are intersected with each other.Particularly, during the fitting surface 4a having a common boundary with cylinder block 3 that is attached to cylinder head 4 when these two flanks 47, the separate distance of these two flanks is large while being attached to each fastening boss 43 than them.The flank 47 of this structure has also prevented that projection 41 is in the direction towards with away from cylinder array and distortion in a lateral direction effectively.
Below with reference to Fig. 9 to Figure 11, cylinder head jacket 50 is described, these accompanying drawings show the casting core 60 for exhaust passage and cylinder head jacket 50.At these, show in the accompanying drawing of casting core 60, the object of describing has for convenience been used for the numbering in the space such as exhaust passage and water jacket and for the numbering of member or casting core 60 in identical accompanying drawing.
As shown in Figures 9 to 11, cylinder head jacket 50 comprises the main water sleeve 51(Fig. 2 from covering firing chamber, top 6) and around exhaust, converge exhaust side water jacket 52(Fig. 6 of part 17).Exhaust side water jacket 52 comprises that from below, covering exhaust converges the bottom exhaust water jacket 53 of part 17 and from top, cover the top exhaust water jacket 54 that exhaust converges part 17.
Exhaust port 16(Fig. 5) and exhaust converge part 17 and formed by the outlet pipe casting core 61 being placed on for the casting mould of casting cylinder cover 4.Similar ground, main water sleeve 51 and bottom exhaust water jacket 53 are formed by the first water jacket casting core 62.That is to say, main water sleeve 51 and bottom exhaust water jacket 53 are at communicate with each other on the whole region except need to avoiding the part of three bolt through hole 4e between every pair of adjacent firing chamber 6 (Fig. 6).More specifically, bottom exhaust water jacket 53 is communicated with main water sleeve 51 at the part place corresponding to firing chamber 6.Similar ground, top exhaust water jacket 54 is formed by the second water jacket casting core 63.These cores 60 are mainly comprised of the sand grains hardening by tackiness agent, thereby make these cores 60 by using core print 64 to be fixed in the position in casting mould, and are disassembled and remove after having cast cylinder head 4.
As substituting of contiguous exhaust outlet 18 arrangements, core print 64 be arranged on from exhaust outlet 18 be offset to the right and relative three positions away from exhaust outlet 18.Also, with reference to Fig. 6, the core print 64 of keeping right is most from extending to the right corresponding to the first part (downstream of converging the exhaust passage of two exhaust ports 16) of converging the upstream extremity of part 17a.Remaining two core print 64 from the first part of converging part 17a lateral alignment forward (as finding in the forward and backward directions) extend, first converges part 17a converges two exhaust ports 17 that are communicated with the firing chamber 6 of low order end.
Each core print 64 be shaped as the bar with circular cross section, and form by utilizing the core print top 64b being arranged on integratedly on the second water jacket casting core 63 to cover the core print bottom 64a being arranged on integratedly on the first water jacket casting core 62.Core print bottom 64a is connected to the upper end of extending passage 53d, and it is upright from the front edge of bottom exhaust water jacket 53 that this extends passage.Core print top 64b is connected to the front edge 54f of top exhaust water jacket 54.Owing to there is core print 64, the wall of the cylinder head 4 forming by die casting demonstrates through hole 4f(with reference to Fig. 8), these through holes are by stopper 44 closures, to guarantee the connection between bottom exhaust water jacket 53 and top exhaust water jacket 54.
That is to say, bottom exhaust water jacket 53 and top exhaust water jacket 54 communicate with each other via vertical communicating passage 55, this vertical communicating passage comprises the space being limited by core print 64, and these vertical communicating passage 55 are as the coolant outlet of bottom exhaust water jacket 53 and the cooling water inlet of top exhaust water jacket 54.
By utilizing by this way the space being created by core print 64 to form vertical communicating passage 55, exempted processing cylinder head 5 and cast the cylinder head job step of closed-wall afterwards, thereby having reduced the quantity of required work.
As shown in Figure 10 and Figure 11, from the part that is used to form main water sleeve 51 of the lower surface of the first water jacket casting core 62 outstanding cylinder body-cylinder cap communicating passage 56 downwards, cylinder body-cylinder cap communicating passage is communicated with cooling water drainage to be gone out to block jacket 70(Fig. 2 with the cooling water inlet 50a of cylinder head jacket 50).
Therefore, cooling water mainly flows as illustrated in fig. 12 in motor 1.More specifically, from cooling water inlet 70a, be introduced into the cooling water block jacket 70, before flowing into the main water sleeve 51 of cylinder head jacket 50 via cylinder body-cylinder cap communicating passage 56, first pass through the array of cylinder-bore 2.Then, cooling water flow, through main water sleeve 51, flows through firing chamber 6 with the direction along perpendicular to cylinder array, and flows into bottom exhaust water jacket 53.After this, cooling water flows into top exhaust water jacket 54 via the vertical communicating passage 55 of skew to the right, and before being discharged cylinder head 4 from coolant outlet 50b, the top exhaust water jacket 54 of flowing through from left to right.
Referring again to Fig. 9 to Figure 11, main water sleeve 51 extends along the cylinder array direction of following the profile of firing chamber 6, and has less protrusion towards its upper end, avoids air inlet port 15(Fig. 2 simultaneously), exhaust port 16(Fig. 2) with for receiving the hole of spark plug.The bottom of main water sleeve 51 is communicated with the cylinder body-cylinder cap communicating passage 56 that is used as the entrance 50a of cylinder head jacket 50.
Except cover exhaust from below, converge the planar surface portion 53c of part 17, bottom exhaust water jacket 53 comprises the extension passage 53d that the exhaust side edge (the exhaust side surface 4d along cylinder head 4 extends) from planar surface portion 53c extends towards top exhaust water jacket 54.As shown in Figures 2 and 3, (that side of the exhaust side surface 4d of cylinder head 4) covering exhaust converges part 17 from the place ahead to extend passage 53d, and Fig. 3 is the zoomed-in view of the relevant portion of Fig. 2.
In general, for the quantity of required casting core is minimized, main water sleeve 51 is with the bottom exhaust water jacket 53 communicating with each other together with top exhaust water jacket 54, and the same for shown in example relatively, is formed with independent common water jacket casting core 65 as shown in Figure 22.Therefore, for bottom exhaust water jacket 53 and top exhaust water jacket 54 are formed from above and below, cover main water sleeve 51, need to make the side towards exhaust outlet 18 of water jacket casting core 65 all open wide, outlet pipe casting core 61 is inserted from end allowing.Therefore, can from the place ahead, cover exhaust and converge part 17.
On the other hand, according to the mode of execution illustrating, as shown in Figures 9 to 11, the casting core that is used to form cylinder head jacket 50 comprises two-part, that is, be used to form the first water jacket casting core 62 and the second water jacket casting core 63 that is used to form top exhaust water jacket 54 of bottom exhaust water jacket 53.Therefore, can from the place ahead covering exhaust, converge part 17 by being formed to the extension passage 53d of bottom exhaust water jacket 53 and top exhaust water jacket 54.
In exhaust side edge (front edge) due to the bottom exhaust water jacket 53 extending towards top exhaust water jacket 54, be provided with and extend passage 53d, the exhaust side surface 4d of cylinder head 4 is by advantageously cooling, thereby prevented that exhaust outlet tubulose portion 42 from overheating, the exhaust side surface of aforementioned cylinder head is born automatic pressure intensifier 19 and is connected to Exhaust gas purifying device 31(Fig. 1 of exhaust outlet tubulose subordinate You Duan) heat.
With reference to Fig. 9 to Figure 11, bottom exhaust water jacket 53 is also provided with pecker 53e, and this pecker extends towards exhaust outlet 18 along direction forward from the part corresponding to exhaust outlet 18 (or its horizontal intermediate portion) at the exhaust side edge (front edge) of planar surface portion 53c.As shown in Figure 7, pecker 53e arrives the lower wall 42b of exhaust outlet tubulose portion 42, thereby the export department of part 17c is converged in the downstream second that covers the cross section with constant from below.In Fig. 7, for the ease of comparing with Fig. 3, extend passage 53d and be illustrated by the broken lines.
As mentioned above, because comprise that the projection 41 of exhaust outlet tubulose portion 42 extends beyond cylinder block 3, to form the portion of dangling, even if therefore come automatic pressure intensifier 19 and the heat that is connected to the Exhaust gas purifying device 31 of projection downstream may cause that the lower wall 42b of exhaust outlet tubulose portion 42 is overheated, because bottom exhaust water jacket 53 is provided with the pecker 53e at the lower wall 42b place that reaches exhaust outlet tubulose portion 42, therefore the lower wall 42b of exhaust outlet tubulose portion 42 can be by advantageously cooling, thereby avoided the distortion of exhaust outlet tubulose portion 42.
As shown in Figures 9 to 11, the shape of top exhaust water jacket 54 is generally plane.The exhaust side edge of the front edge 54f(cylinder head 4 of top exhaust water jacket 54) right-hand side (upstream side) that is formed with vertical communicating passage 55 along it is provided with upstream second and converges the oval-shaped external frame (with reference to Fig. 6) that part 17b conforms to, and its part of surrounding vertical communicating passage 55 further exceeds cartouche extension around vertical communicating passage 55 forward.Meanwhile, the left-hand side (downstream side) of the front edge 54f of top exhaust water jacket 54 extends from the cylinder array central linear corresponding to the most forward outstanding exhaust outlet 18 along the direction of cylinder array.
That is to say, as shown in plane view, the front edge 54f of top exhaust water jacket 54 converges in upstream second in the whole length of part 17b and extends beyond forward the external frame (with reference to Fig. 6) that part 17b is converged in upstream second, and front edge 54f extends beyond upstream second and converges the distance of the external frame of part 17b and increase towards left-hand side or downstream side from the mid point of cylinder array.That is to say that the part of the tight downstream part that is positioned at exhaust outlet 18 of top exhaust water jacket 54, as shown in plane view, is provided with the remarkable part of extending of external frame of converging part 17 from exhaust.
Therefore, the central point of the cross sectional area of top exhaust water jacket 54 from upstream extremity (right-hand member) to cylinder array increases gradually, and keep constant from central point to its downstream area of cylinder array, substantially be consistent with the cross sectional area (width) of the part being at utmost exaggerated corresponding to exhaust outlet 18, thereby present the profile of the essentially rectangular of observing from top.That is to say, the cross sectional area of the top exhaust water jacket 54 of general plane shape is from the part corresponding to exhaust outlet 18 to coolant outlet 50b constant.The restriction of cylinder head converges wall 45(Fig. 4 and Fig. 5 of the remarkable outstanding part 54c of external frame of part 17 from exhaust) than aforementioned projection 41, more onwards to protrude, the size of cylinder head 4 is for minimizing.
Mobile in cylinder head jacket 50 of above-mentioned cooling water will be below more specifically described with reference to Figure 13 A and Figure 13 B and Figure 14 A and Figure 14 B.
With reference to Figure 13 A, relevant with bottom exhaust water jacket 53 to cylinder head jacket 51, the cooling water inlet 50a of cylinder head jacket 50 is formed in main water sleeve 51, and as the vertical communicating passage 55 of the coolant outlet of bottom exhaust water jacket 53, is formed on the right-hand side part of the front edge 53f of bottom exhaust water jacket 53.Therefore, as shown in the white arrow in Figure 13 A, cooling water flow through obliquely main water sleeve 51 and bottom exhaust water jacket 53.
On the other hand, in the example for comparing shown in Figure 13 B, the either side that is adjacent to exhaust outlet 18 as the vertical communicating passage 55 of the coolant outlet of bottom exhaust water jacket 53 is arranged on the front edge 53f of bottom exhaust water jacket 53, thereby make the cooling water of introducing from the cooling water inlet 50a of cylinder head jacket 50 flow towards the vertical communicating passage 55 of left-hand side, and the cooling water of having introduced from the cooling water inlet 50a corresponding to two right-hand side cylinder-bore 2 flow towards the vertical communicating passage 55 of right-hand side.Therefore,, in the part of exhaust outlet 18 around being arranged in the midpoint of cylinder array, although there is higher heat concentration in this region, cooling water trends towards stagnating.Therefore, in this region, can realize poor cooling effect.In addition, poor cooling effect causes the activity boiling in this region, and known activity boiling has corrosive action to material around.
On the contrary, in Figure 13 A of present embodiment is shown, the cooling water flow of having introduced from the cooling water inlet 50a of the cylinder-bore 2 corresponding to high order end through firing chamber 6, enters in bottom exhaust water jacket 53, and then the front edge 53f along bottom exhaust water jacket 53 flows.Therefore, prevent that cooling water stagnates in the region of the exhaust outlet 18 of the contiguous midpoint that is arranged in cylinder array, high temperature may be born in this region, thereby avoids the risk of the corrosion that the boiling due to cooling water causes.
And, because vertical communicating passage 55 is arranged on the right side of exhaust outlet 18 in the position of relative shift, can avoid the stagnation of the cooling water in the part between vertical communicating passage 55 and exhaust outlet 18, can be by advantageously cooling around the region of exhaust outlet 18 thereby make.
Below with reference to Figure 14 A and Figure 14 B to cooling water mobile being described in top exhaust water jacket 54.As mentioned above, cooling water is from the residing right-hand side of vertical communicating passage 55 to the residing left-hand side of the coolant outlet 50b top exhaust water jacket 54 of flowing through.As shown in the arrow in Figure 14 A, until in the region on the right side of the mid point of cylinder array, the width of plane top exhaust water jacket 54 increases towards downstream gradually along with the raising of the flow rate of the cooling water by vertical communicating passage 55 supplies, and starts to become forward constant from the part corresponding to exhaust outlet 18.Therefore,, as shown in the arrow in accompanying drawing, the flowing velocity of cooling water is constant in whole top exhaust water jacket 54.
On the other hand, if conforming to, reduces gradually the external frame that the width of plane top exhaust water jacket 54 starts along downstream direction from the part corresponding to exhaust outlet 18 to converge part 17 with exhaust, as shown in Figure 14 B, narrow due to passage, the Speed Reduction of cooling water in the region of front edge 54f, thus make to surround the region be especially exposed to the exhaust outlet 18 under high temperature by very poor cooling.
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 (Fig. 6), cooling water flows in the front portion of plane top exhaust water jacket 54 with homogeneous velocity, and does not occur significant stagnation.Therefore, the encirclement of the front edge 54f of top exhaust water jacket 54 be especially exposed to the part of the exhaust outlet 18 under high temperature can be by effectively cooling.
Now will more specifically to vertical communicating passage 55, be described hereinafter.As shown in Figure 9, vertical communicating passage 55 is extended forward from the oval-shaped front edge 54f of top exhaust water jacket 54.As shown in Fig. 8, Figure 10 and Figure 11, in bottom exhaust water jacket 53, vertical communicating passage 55 is outstanding towards exhaust side surface 4d from the cartouche of the extension passage of bottom exhaust water jacket 53, and the external frame that the cartouche of the extension passage of bottom exhaust water jacket 53 and exhaust converge part 17 conforms to and forms.Vertical communicating passage 55 is less than extension passage 53d along the height of cylinder-bore axis from extending the outstanding height of passage 53d.
When vertical communicating passage 55 is outstanding from extension passage 53d on the 4d of exhaust side surface, the cross sectional area that has prevented the cooling water passage between bottom exhaust water jacket 53 and vertical communicating passage 55 reduces suddenly, thereby makes the minimise loss of pressure in cylinder head jacket 50.When vertical communicating passage 55 is extended passage 53 as its part formation by use, the passage length of vertical communicating passage 55 can be minimized, and can guarantee to be enough to from the flow rate of extending the cooling water of passage 53d the exhaust side surface 4d of cooling air cylinder cap 4.
Figure 15 in arrangement according to the invention with according to the layout of the example for relatively between, in cylinder head jacket 50, at bottom exhaust water jacket 53, vertical communicating passage 55, top exhaust water jacket 54 and coolant outlet 50b place, the pressure loss is compared, in the example for comparing, vertical communicating passage 55 is not protruded from extending passage 53d.As understandable from figure, in cylinder head jacket 50 according to the present invention, although the pressure loss ratio at bottom exhaust water jacket 53 and top exhaust water jacket 54 places is used for the slightly large of example relatively, but the whole pressure losses in vertical communicating passage 55 are much smaller than the pressure loss for example relatively, thereby make the pressure loss of whole water jacket be significantly less than the pressure loss for example relatively.
Figure 16 shows according to the present invention and according to the example for relatively, the flow rate of cooling water and required for the relation between the pump delivery pressure of cylinder head jacket 50, in the example for comparing, vertical communicating passage 55 is not protruded from extending passage 53d.In this chart, block curve is indicated according to cylinder head jacket 50 of the present invention, and dashed curve indication is for example relatively.The output characteristics of dot and dash line curve indication pump.Pump turns round with constant speed 7800rpm.As understood from Figure 16, for the flow of cooling water speed of example relatively, be only 120L/min, and 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 flow rate of the cooling water of the cylinder head jacket of flowing through 50 can be maximized, and cooling air cylinder cap 4 effectively.
The second mode of execution
Below with reference to Figure 18 and Figure 19, the second mode of execution of the present invention is described.In Figure 18 and Figure 19, corresponding to the part of those parts in the first mode of execution, with similar reference character, indicate, and needn't in corresponding written description, to these parts, be repeated in this description.
In this embodiment, as shown in figure 18, the cooling water inlet 50a of cylinder head jacket 50 is more preferably arranged on the air inlet side of each firing chamber 6 or is arranged on the air inlet side of main water sleeve 51, reaches than the more obvious degree of the first mode of execution.More specifically, the cooling water inlet 50a that is arranged on exhaust side will be less than and/or be less than the cooling water inlet that is arranged on air inlet side.That is to say, cooling water inlet 50a moves towards the air inlet lateral deviation of main water sleeve 51.The area that the cooling water inlet 50a using herein " is preferably arranged on air inlet side " or the statement of " moving towards air inlet lateral deviation " represents to be formed on the cooling water inlet 50a of air inlet side is greater than the area of the cooling water inlet that is formed on exhaust side.
By forming by this way cooling water inlet 50a, as shown in figure 19, substantially from be formed on block jacket 70 whole cooling water of introducing of the cooling water inlet 70a of (exhaust) side towards air inlet gusset, the array around cylinder-bore 2 flows, and via cylinder body-cylinder cap communicating passage 56(cooling water inlet 50a) flow into the main water sleeve 51 of cylinder head jacket 50.Subsequently, while flowing through firing chamber 6 along the direction perpendicular to cylinder array before cooling water is flowing into bottom exhaust water jacket 53, water quench firing chamber 6.The subsequent flowing of cooling water is identical with the first mode of execution.
Therefore, by the air inlet lateral deviation towards main water sleeve 51, move cylinder body-cylinder cap communicating passage 56, the most cooling water being introduced in cylinder head jacket 50 flows through main water sleeve 51 towards bottom exhaust water jacket 53, thereby the part (part of the part of the encirclement firing chamber 6 of cylinder block and the tight top that is positioned at firing chamber 6 of cylinder head 4) that makes to surround firing chamber 6 can be cooled most effectively.When choosing this structure, preferably increase the area of cooling water inlet 70a, thereby compare with the first mode of execution, reduce the pressure loss.
Because the cooling water inlet 70a of block jacket 70 is arranged on exhaust side, and cylinder body-cylinder cap communicating passage 56 is moved towards the air inlet lateral deviation of main water sleeve 51, therefore most of cooling water array around cylinder-bore 2 before flowing into cylinder body-cylinder cap communicating passage 56 of introducing block jacket 70 from cooling water inlet 70a flows, can be by effectively cooling thereby make to surround the part of cylinder-bore 2.Although cylinder body-cylinder cap communicating passage 56 is moved towards air inlet lateral deviation, when cylinder body-cylinder cap communicating passage 56 forms along cylinder array at regular intervals, cooling water can be from main water sleeve 51 cooling whole firing chamber 6 equably.
The modification of mode of execution
The present invention is illustrated by specific mode of execution, but the restriction of the mode of execution that the present invention is not illustrated, and can in different parts, change in the case of without departing from the spirit of the present invention.For example, aforementioned embodiments is for automobile four valve in-line four cylinder petrol engines, but is applicable to too the motor for the other types of other objects.In aforementioned embodiments, be only provided with an exhaust outlet 18, yet two exhaust outlets also can be set, each exhaust outlet is for two corresponding adjacent cylinders.
In aforementioned embodiments, the part that exhaust water jacket 54 extends towards its downstream from the part corresponding to exhaust outlet 18 at it, there is the outstanding part 54c of external frame that converges part 17 from exhaust, but can be instead, bottom exhaust water jacket 53 can be provided with so outstanding part.In this case, main water sleeve 51 is directly communicated with top exhaust water jacket 54, and therefore the vertical communicating passage 55 that top exhaust water jacket 54 is communicated with to the cooling water inlet of bottom exhaust water jacket 53 (as) with bottom exhaust water jacket 53 is arranged on one end with respect to cylinder array direction of bottom exhaust water jacket 53.Bottom exhaust water jacket 53 is also provided with coolant outlet at it on respect to the other end of cylinder array direction.
And, in aforementioned embodiments, extend passage 53d and be provided for bottom exhaust water jacket 53, so that converge the outside (that side on the exhaust side surface 4 of cylinder head 4) of part 17 extends upward from this bottom exhaust water jacket along exhaust, but alternatively or additionally, extend passage and can be provided for top exhaust water jacket 54, to converge the outside of part 17 along exhaust, from this top exhaust water jacket, dangle.
Specific structure, layout, quantity and the angle of different parts can arbitrarily be revised in the case of without departing from the spirit of the present invention.And all different parts of the motor in the mode of execution illustrating are dispensable for the present invention, can be removed if desired.
Reference numerals list
1 motor
2 cylinder-bore
3 cylinder block
4 cylinder head
4d exhaust side surface
5 pistons
6 firing 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 exhaust outlets
44 stoppers (plug member)
50 cylinder head jacket
50a cooling water inlet
50b coolant outlet
51 main water sleeves
53 bottom 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. the cooling structure for explosive motor, this explosive motor comprises the cylinder head on the top surface that limits the cylinder block in an exhaust casing hole and be arranged on described cylinder block, described cylinder head limits firing chamber with being slidably received in the top surface cooperation of the piston in each cylinder-bore, the inside of described cylinder head and described cylinder block limits respectively cylinder head jacket and the block jacket being interconnected, and it is characterized in that:
The inside of described cylinder head is provided with exhaust and converges part and a plurality of exhaust port, each exhaust port all has towards the uncovered upstream extremity in corresponding firing chamber, described exhaust converges part described a plurality of exhaust ports is converged, and described exhaust fluidic junction is divided the uncovered exhaust outlet of longitudinal intermediate portion of the side surface that is included in described cylinder head; And
Described cylinder head jacket comprises the main water sleeve that covers described firing chamber from top, from below, covers the bottom exhaust water jacket that described exhaust converges part, and from top, cover described exhaust converge part top exhaust water jacket, described main water sleeve is provided with a plurality of cooling water inlets that arrange around each cylinder-bore, and described main water sleeve is communicated with an exhaust water jacket in described bottom exhaust water jacket and described top exhaust water jacket;
Wherein, the vertical passageway that described bottom exhaust water jacket and described top exhaust water jacket are communicated with each other is arranged in the following part of another exhaust water jacket in described bottom exhaust water jacket and described top exhaust water jacket, this part is moved towards a lateral deviation along cylinder array direction from the position corresponding to described exhaust outlet of described another exhaust water jacket, and for the coolant outlet of described another exhaust water jacket, be arranged on the following part of described another exhaust water jacket, this part is offset towards opposite side along described cylinder array direction from the position corresponding to described exhaust outlet of described another exhaust water jacket.
2. the cooling structure for explosive motor according to claim 1, wherein, the described cooling water inlet of the described main water sleeve being communicated with described block jacket is preferentially arranged on the air inlet side of described main water sleeve.
3. the cooling structure for explosive motor according to claim 2, wherein, the cooling water inlet of described block jacket is arranged on the exhaust side of described cylinder block.
4. the cooling structure for explosive motor according to claim 1, wherein, the described vertical passageway that described bottom exhaust water jacket and described top exhaust water jacket are communicated with each other is formed by the casting cavity of plug member closure independently.
5. the cooling structure for explosive motor according to claim 1, wherein, at least one exhaust water jacket in described bottom exhaust water jacket and described top exhaust water jacket is provided with extension passage, this extension passage converges the outside extension of part from the outward edge of described at least one exhaust water jacket along described exhaust, and described vertical passageway is arranged in described extension passage.
6. the cooling structure for explosive motor according to claim 5, wherein, described vertical passageway stretches out and exceeds the external frame of described extension passage.
7. the cooling structure for explosive motor according to claim 5, wherein, described extension channel setting is in a described exhaust water jacket.
8. the cooling structure for explosive motor according to claim 1, wherein, a described exhaust water jacket is described bottom exhaust water jacket.
9. the cooling structure for explosive motor according to claim 1, wherein, described vertical passageway and described coolant outlet are separately positioned in the roughly end portion of described another exhaust water jacket with respect to described cylinder array direction.
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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| Publication Number | Publication Date |
|---|---|
| CN103967577A true CN103967577A (en) | 2014-08-06 |
| CN103967577B CN103967577B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410039866.3A Active CN103967577B (en) | 2013-01-28 | 2014-01-27 | Cooling structure for explosive motor |
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| Country | Link |
|---|---|
| JP (1) | JP6055322B2 (en) |
| CN (1) | CN103967577B (en) |
| DE (1) | DE102014201338A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855378A (en) * | 2019-11-27 | 2021-05-28 | 本田技研工业株式会社 | Multi-cylinder internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108138690B (en) * | 2015-10-23 | 2020-07-03 | 本田技研工业株式会社 | Water jacket structure of cylinder head |
| CN108138687B (en) * | 2015-10-23 | 2020-10-16 | 本田技研工业株式会社 | Cooling structure of water-cooled engine |
| 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 |
| WO2018157187A1 (en) * | 2017-03-03 | 2018-09-07 | Avl List Gmbh | Liquid-cooled 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855378A (en) * | 2019-11-27 | 2021-05-28 | 本田技研工业株式会社 | Multi-cylinder internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103967577B (en) | 2016-09-07 |
| JP6055322B2 (en) | 2016-12-27 |
| DE102014201338A1 (en) | 2014-07-31 |
| JP2014145284A (en) | 2014-08-14 |
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