CN103967644A

CN103967644A - Cylidner cover used for internal combustion engine

Info

Publication number: CN103967644A
Application number: CN201410040475.3A
Authority: CN
Inventors: 多田和司
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2013-01-28
Filing date: 2014-01-27
Publication date: 2014-08-06
Anticipated expiration: 2034-01-27
Also published as: DE102014201336A1; JP2014145280A; JP6096518B2; CN103967644B

Abstract

The invention relates to a cylinder cover (4) used for an internal combustion engine (1). The cylinder cover (4) is provided with a protruding part (41) protruding from a side face (4a) of the cylinder cover (4) so as to internally define at least a part of an exhaust convergence part (17). An exhaust outlet tubular part (42) is formed at a downstream end of the protruding part, and the exhaust outlet tubular part defins an exhaust outlet (18) inside. A lower surface of the exhaust outlet tubular part is provided with a pair of ribs (47) which extend toward and away from the side face of the cylinder cover, thereby facilitating prevention of thermal deformation of the exhaust outlet tubular part.

Description

For the cylinder head of explosive motor

Technical field

The present invention relates to a kind of cylinder head for explosive motor, in this cylinder head, be limited with exhaust and converge part.

Background technique

In traditional multicylinder engine, multiple 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 air inlet side surface and the exhaust side surface of cylinder head for converging the gas exhaust manifold of exhaust.Recently, for converge the exhaust of exhaust converge part be sometimes limited in cylinder head, thereby make independent outlet pipe be connected to the exhaust side surface of cylinder head.

Converge in the multicylinder engine of part in the exhaust having in the cylinder head of being limited at, 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 causing due to the exhaust of releasing heat; 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, for fear of the thermal degradation of the catalyzer that may cause by the excessive lifting of the temperature of exhaust and/or act on motor and outlet pipe on thermal stress, may need exhaust suitably cooling, thereby may need exhaust to be cooled to suitable degree.

As for the cooling structure around being limited at exhaust in cylinder head and converging the part of part, once advised forming water jacket in cylinder head, converge part thereby cover exhaust from above and below.For example, referring to JP2008-309158A.

But, according to this suggestion, limit the wall that exhaust converges part, more specifically, limit the outside wall of water jacket and cylinder head, from cylinder head outstanding to side with part cylinder block boundary, thereby being born from being just in time connected to exhaust, outstanding wall converges the pressurized machine of downstream and the heat of Exhaust gas purifying device partly.Therefore, outstanding wall may bear hot load to degree so,, makes outstanding wall distortion that is, and cylinder head and the sealing that is connected between the device in its downstream may be damaged.

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 cylinder head for explosive motor is provided, this cylinder head is provided with projection, the inside of this projection limits at least a portion that exhaust converges part, makes this projection there is no comparatively speaking thermal distortion.

Second object of the present invention is to provide a kind of cylinder head for explosive motor, this cylinder head is provided with projection, the inside of this projection limits at least a portion that exhaust converges part, makes to converge the exhaust outlet of part and to be connected between its device in exhaust to keep favourable sealing effect.

According to the present invention, this object can be by providing a kind of cylinder head 4 for explosive motor 1 to realize, this cylinder head is arranged on the top surface of the cylinder block 3 that limits an exhaust casing hole 2, and 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 limits cylinder head jacket 50, it is characterized in that: the inside of described cylinder head is provided with exhaust and converges part 17 and multiple exhaust port 16, each exhaust port all has the upstream extremity uncovered towards corresponding firing chamber, described exhaust converges part described multiple exhaust ports is converged, and described exhaust fluidic junction is divided the exhaust outlet 18 that longitudinal intermediate portion of the side surface 4d that is included in described cylinder head is uncovered, described exhaust converges the part that at least comprises described exhaust outlet of part by limiting from the outstanding projection 41 of the described side surface of described cylinder head, and the lower surface of described projection is provided with towards the flank 47 extending with the described side surface away from described cylinder head.

According to this structure, the wall that limits projection is the portion of dangling to be given prominence to from cylinder head, and flank has prevented the distortion of not wishing appearance of this portion of dangling.

According to the preferred embodiment of the present invention, the downstream of described projection 41 is formed as exhaust outlet tubulose portion 42, and the free end of described exhaust outlet tubulose portion is provided with described free-ended at least one the fastening boss for venting gas appliance 19,31 being fixed to described exhaust outlet tubulose portion, and described flank extends to described fastening boss from the part of this cylinder head of vicinity of described cylinder head and the interface of described cylinder block.

Conventionally, such as the venting gas appliance of pressurized machine and catalyst converter directly or be connected to the free end of exhaust outlet tubulose portion via connecting tube, and fastening boss is provided with the hole for receiving bolt in centre conventionally, this bolt is used for venting gas appliance to be fixed to the free end of exhaust outlet tubulose portion, thereby has guaranteed the high rigidity of exhaust outlet tubulose portion together with flank.Therefore,, even in the time that the free end of exhaust outlet tubulose portion bears the heat from motor and/or venting gas appliance, what flank and fastening boss had also prevented exhaust outlet tubulose portion jointly does not wish the distortion that occurs.

According to an aspect of the present invention, the downstream of described projection 41 is formed as exhaust outlet tubulose portion 42, and the free end of described exhaust outlet tubulose portion is provided with the described free-ended a pair of fastening boss for venting gas appliance 19,31 being fixed to described exhaust outlet tubulose portion, described a pair of fastening boss is spaced and protrude from the described free-ended lower surface of described exhaust outlet tubulose portion each other, and pair of ribs 41 extends to the part of this cylinder head of vicinity of described cylinder head and the interface 4a of described cylinder block from corresponding fastening boss.

Therefore, the rigidity of exhaust outlet tubulose portion can be further improved.Along with flank extends towards the part of this cylinder head of vicinity of cylinder head and the interface of cylinder block, flank can depart from each other or be intersected with each other.In both cases, exhaust outlet tubulose portion can advantageously be strengthened, to resist bending deflection and torsional deflection.

According to by cylinder head provided by the invention, although converge the projection of at least a portion of part gives prominence to from the side surface of cylinder head with the form of the portion of dangling or cantilever in inside restriction exhaust, but by least one flank on the lower surface that is formed on projection is provided, effectively prevent the distortion of projection.

Brief description of the drawings

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 as the cylinder head that provides of mode of execution of amendment;

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 intercepting along the cutting line XXI-XXI 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, describe implementing automobile internal motor of the present invention (motor 1).

The first mode of execution

As depicted in figs. 1 and 2, motor 1 is mainly made up 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 be attached to the box-like cylinder head 4 of 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 up of 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.But in the time being installed on 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 fore-and-aft direction are limited by the arrow in Fig. 2 of this orientation based on motor 1.For example, cylinder block 3 is positioned at cylinder head 4 belows.The direction of travel of vehicle by the horizontal direction of the arrow instruction in Fig. 1 based on 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, for the packing ring of this interface structure 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), and the valve actuation chamber 9 for receiving valve actuating mechanism 8 is limited jointly 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, converge part 17(with reference to Fig. 6 for converging the exhaust of exhaust port 16) 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 connecting for the middle casing 22 of receiving the rotor shaft 21 that laterally (level) extends.

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 has at its free end the entrance flange 26a of exhaust entrance of restriction, 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 neutral position place 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 front 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 bending 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 front 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 two exhaust ports 16 that part is converged corresponding firing chamber 6; Part 17b is converged in a pair of upstream second, and these upstreams second are converged part and converged part 17a by first of two right sides respectively and merge together, and converges part 17a by first of two left sides 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 has the cross section of constant at its exit region.Exhaust converges part 17 and is provided with from the planimetric map external frame of firing chamber 6 convergents, thereby prevents that the exhaust of discharging from each firing chamber 6 from flowing into the exhaust port of adjacent firing chamber 6, and therefore reduces exhaust resistance.

But 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); The front that the fitting surface 4a of cylinder head 4 is converged part 17c and is positioned in part 17b and downstream second is converged in upstream 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 is formed as tube, and this tube converges part outstanding (at the exhaust side surface 4d) forward of part 17b from limiting upstream second.Converge 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 to limit first from cylinder block 3 is outstanding.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 the position openings of the bolt-through hole 4e of bolt (not shown) that cylinder head 4 is fastened to cylinder block 3 on the outside between every pair of adjacent firing chamber 6 and in each end firing chamber 6.In addition, at the fitting surface 4a place of cylinder head 4, multiple 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 (being identical substantially for each cylinder-bore 2 thereby make the region of the combination of cooling water inlet 50a).

As shown in Figures 3 to 5, exhaust outlet tubulose portion 42 is inclined upwardly away from firing chamber 6, and has the attachment face 42a for connecting pressurized machine 19 in its tail end.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 exhaust passage between firing chamber 6 and pressurized machine 19 hinders 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 spaced apart with cylinder head 4 in the case of not increasing the size of 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, in the time that 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 reduce 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, flow in order to improve the smooth and easy of exhaust in guaranteeing the suitable layout degrees of freedom of supplementary equipment, have to reduce the performance of triple-effect catalytic unit 32.But, 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 the bend angle that reduces 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 of the sealability to the part around exhaust outlet 18.Because the fastening boss 43 in top is protruding in valve actuation chamber 9, prevent the interference of the fastening boss 43 in top to valve actuation chamber 9, in the case of not increasing the size of cylinder head 4, allow pressurized machine 19 to be placed on 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 neutral position place 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 exceedes 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 the peripheral part of the fitting surface 4a having a common boundary with cylinder block 3 of cylinder head 4.These flanks 47 extend or with towards extending with the mode away from cylinder array along directions forward and backward, and depart from each other in the time of the fitting surface 4a having a common boundary with cylinder block 3 that they extend to cylinder head 4 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 exceedes cylinder block 3, be in particular the lower surface of projection, bear the heat of automatic pressure intensifier 19 and Exhaust gas purifying device 31 by conduction, radiation and convection current.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.But in the mode of execution illustrating, the flank 47 being formed on the lower surface of projection 41 extends away from cylinder array, thereby prevent 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, act on load on projection 41 and at high temperature can cause the distortion of projection 41.But, 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 as beam is cooperated with fastening boss 43, has effectively improved the rigidity of projection 41, thereby has prevented on the whole the distortion of projection 41.

Extend to depart from each other with respect to the fitting surface 4a of cylinder block 3 towards cylinder head 4 from the fastening boss 43 in bottom of the both sides that are formed on exhaust outlet tubulose portion 42 owing to being formed on two flanks 47 on the lower surface of projection 41, 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 amendment, flank 47 can be configured to the form shown in Figure 17.In the mode of execution of this amendment, along with two flanks 47 that extend from two fastening boss 43 in bottom extend towards the fitting surface 4a having a common boundary with cylinder block 3 of cylinder head 4, these two flanks are intersected with each other.Particularly, when 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 also effectively prevented projection 41 towards with direction away from cylinder array and distortion in a lateral direction.

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.Show in the accompanying drawing of casting core 60 at these, 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 converge exhaust side water jacket 52(Fig. 6 of part 17 around exhaust).Exhaust side water jacket 52 comprises that cover exhaust converges the bottom exhaust water jacket 53 of part 17 and cover the top exhaust water jacket 54 that exhaust converges part 17 from top from below.

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 made up 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 (converging the downstream of 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 this extension passage is upright from the front edge of bottom exhaust water jacket 53.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, exempt 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 outstanding cylinder body-cylinder cap communicating passage 56 downwards of the lower surface of the first water jacket casting core 62, 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, be introduced into the cooling water block jacket 70 from cooling water inlet 70a, 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 edge perpendicular to the direction of 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 the profile of following 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 of the entrance 50a as cylinder head jacket 50.

Converge the planar surface portion 53c of part 17 except cover exhaust from below, 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 front to extend passage 53d, and Fig. 3 is the zoomed-in view of the relevant portion of Fig. 2.

In general, for the quantity that makes required casting core minimizes, 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 as shown in Figure 22, is formed with independent common water jacket casting core 65.Therefore, in order to make bottom exhaust water jacket 53 and top exhaust water jacket 54 be formed as covering main water sleeve 51 from above and below, the side towards exhaust outlet 18 that need to make water jacket casting core 65 is all opened wide, and outlet pipe casting core 61 is inserted from end allowing.Therefore, can cover exhaust from front 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,, 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 converge part 17 from front covering exhaust by the extension passage 53d that is formed to 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, may cause that with the heat of the Exhaust gas purifying device 31 that is connected to projection downstream the lower wall 42b of exhaust outlet tubulose portion 42 is overheated even if therefore carry out automatic pressure intensifier 19, 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 around vertical communicating passage 55 forward and extends.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 significantly part of extension of external frame of converging part 17 from exhaust.

Therefore, the cross sectional area of top exhaust water jacket 54 increases gradually from upstream extremity (right-hand member) to the central point of cylinder array, 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 from the profile of the essentially rectangular of top observation.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) more onwards to protrude than aforementioned projection 41, 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 is formed on the right-hand side part of the front edge 53f of bottom exhaust water jacket 53 as the vertical communicating passage 55 of the coolant outlet 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 the cooling water that the cooling water inlet 50a from cylinder head jacket 50 has introduced is flowed 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 of midpoint around being arranged in 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 that 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, then flows along the front edge 53f of bottom exhaust water jacket 53.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 causing due to the boiling of cooling water.

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 by 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 of being supplied by vertical communicating passage 55, and constant from starting to become forward corresponding to the part of 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 the width of plane top exhaust water jacket 54 conforms to and reduces gradually from the external frame that starts corresponding to the part of exhaust outlet 18 to converge part 17 with exhaust along downstream direction, 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 that is 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 be described vertical communicating passage 55 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 the height of extension passage 53d along cylinder-bore axis from extending the outstanding height of passage 53d.

In the time that 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.In the time that 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 ensure to be enough to from the flow rate of cooling water of extending 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 instruction is for example relatively.The output characteristics of dot and dash line curve instruction pump.Pump turns round with constant speed 7800rpm.As understood from Figure 16, be only 120L/min for the flow of cooling water speed of example relatively, 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, indicate with similar reference character corresponding to the part of those parts in the first mode of execution, and needn't in corresponding written description, be repeated in this description these parts.

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 cooling water inlet 50a using herein " is preferably arranged on air inlet side " or the statement of " moving towards air inlet lateral deviation " represents that the area of the cooling water inlet 50a that is formed on 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 flow around the array of cylinder-bore 2 towards air inlet gusset, 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, when before cooling water is flowing into bottom exhaust water jacket 53, firing chamber 6 is flow through perpendicular to the direction of cylinder array in edge, water quench firing chamber 6.The subsequent flowing of cooling water is identical with the first mode of execution.

Therefore, move cylinder body-cylinder cap communicating passage 56 by the air inlet lateral deviation towards main water sleeve 51, 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 immediately above that is positioned at firing chamber 6 of the part of the encirclement firing chamber 6 of cylinder block and cylinder head 4) that makes to surround firing chamber 6 can be cooled most effectively.In the time choosing this structure, preferably increase the area of cooling water inlet 70a, thereby compared 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, in the time that 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 amendment 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 change in different parts 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, but two exhaust outlets also can be set, each exhaust outlet is for two corresponding adjacent cylinders.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

4a fitting surface

4d exhaust side surface

5 pistons

6 firing chambers

16 exhaust ports

17 exhausts converge part

18 exhaust outlets

19 pressurized machines

41 projections

42 exhaust outlet tubulose portions

43 fastening flanks

47 flanks

50 cylinder head jacket.

Claims

1. the cylinder head for explosive motor, this cylinder head is arranged on the top surface of the cylinder block that limits an exhaust casing hole, and 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 limits cylinder head jacket, it is characterized in that:

The inside of described cylinder head is provided with exhaust and converges part and multiple exhaust port, each exhaust port all has the upstream extremity uncovered towards corresponding firing chamber, described exhaust converges part described multiple 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, described exhaust converges the part that at least comprises described exhaust outlet of part by limiting from the outstanding projection of the described side surface of described cylinder head; And

The lower surface of described projection is provided with towards the flank extending with the described side surface away from described cylinder head.

2. the cylinder head for explosive motor according to claim 1, wherein, the downstream of described projection is formed as exhaust outlet tubulose portion, and the free end of described exhaust outlet tubulose portion is provided with described free-ended at least one the fastening boss for venting gas appliance being fixed to described exhaust outlet tubulose portion, and described flank extends to described fastening boss from the part of this cylinder head of vicinity of described cylinder head and the interface of described cylinder block.

3. the cylinder head for explosive motor according to claim 2, wherein, the central authorities of described fastening boss are provided with the hole for receiving bolt, and described bolt is for being fixed to described venting gas appliance the described free end of described exhaust outlet tubulose portion.

4. the cylinder head for explosive motor according to claim 1, wherein, the downstream of described projection is formed as exhaust outlet tubulose portion, and the free end of described exhaust outlet tubulose portion is provided with the described free-ended a pair of fastening boss for venting gas appliance being fixed to described exhaust outlet tubulose portion, described a pair of fastening boss is spaced and protrude from the described free-ended lower surface of described exhaust outlet tubulose portion each other, pair of ribs extends to the part of this cylinder head of vicinity of described cylinder head and the interface of described cylinder block from corresponding fastening boss.

5. the cylinder head for explosive motor according to claim 4, wherein, along with described flank extends towards the described part of this cylinder head of vicinity of described cylinder head and the interface of described cylinder block, described flank departs from each other.

6. the cylinder head for explosive motor according to claim 4, wherein, along with described flank extends towards the described part of this cylinder head of vicinity of described cylinder head and the interface of described cylinder block, described flank is intersected with each other.

7. the cylinder head for explosive motor according to claim 4, wherein, the central authorities of described fastening boss are provided with the hole for receiving bolt, and described bolt is for being fixed to described venting gas appliance the described free end of described exhaust outlet tubulose portion.