CN201372859Y - Water-cooled engine cylinder head structure - Google Patents

Abstract

The utility model relates to a water-cooled engine cylinder head structure. The engine at least comprises a cylinder head and a cylinder body; a cooling water passage is arranged in the cylinder head; at least three penetration holes communicated with a combustion chamber are formed on the cylinder head for a spark plug, an air intake valve and an air release valve to penetrate through; at least a sand discharge hole is formed above the cooling water passage of the cylinder head; and a sealing element is adopted to seal the sand discharge hole. The water-cooled engine cylinder head structure is characterized in that an extending segment is arranged at the lower end of the sealing element toward the combustion chamber, and the extending segment of the sealing element is propped against the spacing wall between the cooling water passage of the cylinder head and the combustion chamber, thereby improving the heat dispersing performance of the cylinder head and lifting the anti-knocking strength of the cylinder head.

Description

The water cooling type engine Structure of cylinder head

[technical field]

The utility model is about a kind of water cooling type engine Structure of cylinder head, particularly about a kind of thermal diffusivity of promoting cylinder head, and the Structure of cylinder head of the antiknock of lift cylinder head shake intensity water cooling type engine.

[background technique]

The start of general vehicle, as motorcycle, all-terrain vehicle etc., be after fresh air that the external world is imported and fuel oil are mixed into oil gas, again the oil gas input engine is fired generation power, move reciprocatingly and promote piston, drive belt speed change mechanism via bent axle and carry out transmission, to reach the purpose of advancing.

And engine can be divided into two kinds of ventilation type engine and water cooling type engines because of the radiating mode difference, and wherein, existing water cooling type engine 1 as shown in Figure 1, 2, is made of cylinder body 11, cylinder head 12.These cylinder body 11 tops are provided with cylinder head 12, then are provided with a piston 14 in the cylinder body 11, and this cylinder body 11 is provided with cooling water inlet 111 and cooling water passage 112; Be provided with pad 13 between cylinder body 11 and the cylinder head 12, be provided with perforation 131 above the pad 13; This cylinder head 12 is provided with a gas-entered passageway 121 and an exhaust passage 122, has a firing chamber in the place, below of cylinder head 12; And cylinder head 12 is provided with a coolant outlet 123 in addition, and the cooling water that flows in cylinder body 11 and the cylinder head 12 can lead to the heat radiation of radiator (not shown), to reach the purpose of cooling engine 1 whereby.

Because cylinder head 12 generally is to make with cast-forming method, therefore for allowing cooling water passage 124 interior cores release smoothly, and can offer a sand outlet 125 in cylinder head 12 tops, core is from releasing that sand outlet 125 can be finished whereby, then with a closure member 2 sand outlet 125 is sealed again, and then formation cooling water passage 124 comes cooling, and but current are logical.Existing cylinder head 12 no doubt can reach cooling purpose by cooling water passage 124.Yet, known to us, need wear three perforation that are communicated in firing chamber 15 on the cylinder head 12 of engine 1 at least, to supply wearing of spark plug 16, suction valve 17 and outlet valve 18 respectively.And, the power of engine 1 be by fuel oil in the firing chamber 15 fire after, fire power by this and promote piston 14 and produce, therefore after fuel oil fires in firing chamber 15, it fires power except that can promoting piston 14, and the firing chamber 15 of cylinder head 12 can be subjected to the pressure that fuel oil fires power equally.Therefore the cooling water passage 124 of cylinder head 12 has directly influenced cylinder head 12 antiknocks shake intensity to the thick thickness of the wall between the firing chamber 15 126.When the thickness of the wall 126 of cooling water passage 124 between firing chamber 15 of cylinder head 12 is thicker, no doubt can increase the antiknock shake intensity of cylinder head 12, but really also can thicklyer because of the thickness of wall 126 cause cylinder head 12 heat radiations bad, and then cylinder head 12 durabilitys are reduced; Yet as when implementing than minimal thickness with the cooling water passage 124 of cylinder head 12 wall 126 between firing chamber 15, though can promote the thermal diffusivity of cylinder head 12, but can cause the antiknock shake intensity of cylinder head 12 to reduce greatly, therefore the as easy as rolling off a log steadiness forfeiture that causes spark plug 16, suction valve 17 and 18 3 members of outlet valve, and then the seal of suction valve 17 and outlet valve 18 is lost, severe patient also can make the damage of spark plug 16, suction valve 17 and outlet valve 18 members.Therefore how to provide the structure that to take into account cylinder head 12 thermal diffusivities and antiknock shake intensity, in fact the important topic that needs to be resolved hurrily for the motorcycle dealer.

[model utility content]

Can't take into account the disappearance of thermal diffusivity and antiknock shake intensity for solving existing cylinder head, the utility model provides a kind of water cooling type engine Structure of cylinder head, and then comes the thermal diffusivity of lift cylinder head, and the antiknock of lift cylinder head shake intensity.

Major technique means of the present utility model are to provide a kind of water cooling type engine Structure of cylinder head, this engine includes a cylinder head at least, one cylinder body, be provided with cooling water passage in this cylinder head, at least wear three perforation that are communicated in the firing chamber on this cylinder head, to supply spark plug respectively, wearing of suction valve and outlet valve, the cooling water passage of cylinder head top is offered a sand outlet at least in addition, on this sand outlet, be sealed with closure member, it mainly is: this closure member lower end has extended the extension towards the firing chamber direction, and the extension of this closure member is to be resisted against the cooling water passage of cylinder head and the spacing wall place of firing chamber, can promote the thermal diffusivity of cylinder head whereby, and the antiknock of lift cylinder head shake intensity.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of existing engine.

Fig. 2 is the partial cutaway schematic of existing cylinder body and cylinder head.

Fig. 3 is the partial cutaway schematic of the utility model cylinder body and cylinder head.

Fig. 4 is another embodiment of Fig. 3.

Fig. 5 is an embodiment more of the present utility model.

Fig. 6,7, the 8th, another embodiment of the present utility model.

Fig. 9 is another embodiment of the present utility model.

1 engine, 11 cylinder body, 111 cooling water inlets

112 cooling water passages, 12 cylinder heads

121 gas-entered passageways, 122 exhaust passages

123 coolant outlets, 124 cooling water passages

125 sand outlets, 126 walls

131 perforation of 13 pads

14 pistons

15 firing chambers, 16 spark plugs

17 advance device valve 18 outlet valves

2 closure member

3 cylinder body, 31 pistons, 32 cooling water passages

4 cylinder heads, 41 firing chambers, 42 cooling water passages

43 sand outlets, 44 spacing wall

441 projections

442 positioning seats, 4421 grooves

5 spark plugs

6 suction valves

7 outlet valves

8 closure member, 81 extensions, 811 grooves

812 holes, 813 step parts

814 radiating fins

The A engine

[embodiment]

Be the effect that enables to be easier to understand structure of the present utility model and can reach, cooperate graphic explanation as the back now:

Water cooling type engine A of the present utility model as shown in Figure 3, includes cylinder body 3, cylinder head 4 at least.These cylinder body 3 tops are provided with cylinder head 4, then are provided with a piston 31 in the cylinder body 3, and this cylinder body 3 is provided with cooling water inlet (not drawing in the diagram) and cooling water passage 32; At least wear three perforation that are communicated in firing chamber 41 on this cylinder head 4, to supply wearing of spark plug 5, suction valve 6 and outlet valve 7 respectively, cooling water passage 42 tops of cylinder head 4 are offered a sand outlet 43 (can be several during enforcement) at least in addition, sealing one closure member 8 is sealed sand outlet 43 whereby on this sand outlet 43; Cooling water among the engine A is respectively via the cooling water passage 32 of cylinder body 3 and the cooling water passage 42 of cylinder head 4, to reach the purpose of cooling engine A whereby.

The utility model is that mainly 41 directions extend an extension 81 towards the firing chamber with these closure member 8 lower ends, make closure member form a reinforcement post whereby.Extension 81 by closure member 8 is resisted against the cooling water passage 42 of cylinder head 4 to the spacing wall 4 between the firing chamber 41

4 top end, as shown in Figure 3, closure member 8 can form a strengthening action for cooling water passage 42 to the spacing wall between the firing chamber 41 44 of cylinder head 4 whereby, therefore the cooling water passage 42 of cylinder head 4 to the thickness of the spacing wall 44 between the firing chamber 41 can be reduced down, cylinder head 4 is except that having preferable thermal diffusivity, also with preferable antiknock shake intensity, extension 81 by closure member 8 is resisted against the top end of the cooling water passage 42 of cylinder head 4 to the spacing wall 44 between the firing chamber 41 simultaneously, and can make closure member 8 itself also become a radiator, and then make the better radiating effect of cylinder head 4 tools.

The utility model is when implementing, as shown in Figure 3, the end in the extension 81 of this closure member 8 is arranged with a groove 811, the projection 441 that is convexly equipped with on the top of this spacing wall 44 in addition, this groove 811 forms corresponding with projection 441, whereby when the extension 81 of closure member 8, when being resisted against the top end of the spacing wall 44 of cooling water passage 42 between firing chamber 41 of cylinder head 4, the preferred positioning effect can be arranged; In addition can be as shown in Figure 4, establish a positioning seat 442 in the upper end of this spacing wall 44, has groove 4421 on this positioning seat 442, come being embedded by this groove 4421 for the extension 81 of closure member 8, also can make the extension 81 of closure member 8 whereby, when being resisted against the top end of the spacing wall 44 of cooling water passage 42 between firing chamber 41 of cylinder head 4, the preferred positioning effect can be arranged.

Again, see also shown in Figure 5, closure member 8 of the present utility model can be in the extension 81 wears hole 812, by the setting of this hole 812 when implementing, cooling water in the cooling water passage 42 directly penetrated closure member 8, made closure member 8 have more radiating effect whereby.

Inferior, see also shown in Fig. 6,7,8, closure member 8 of the present utility model is when implementing, the external diameter of extension 81 can be given and dwindling, make closure member 8 form section difference shape 813, and this extension 81 is implemented with various geometrical shapies,, make this extension 81 form a deflector whereby as rectangle or circle or ellipse etc., to make the cooling water in the cooling water passage 42 have more fluency, can make closure member 8 whereby equally more than the tool radiating effect.

In addition, see also shown in Figure 9, closure member 8 of the present utility model is when implementing, can several radiating fins 814 be set 81 outer periphery in the extension, 81 outer periphery are provided with several radiating fins 814 by the extension, and then can increase cooling water area of contact in closure member 8 and the cooling water passage 42, make closure member 8 have more radiating effect whereby.

Effect of the present utility model is that 41 directions extend an extension 81 towards the firing chamber by closure member 8 lower ends, makes closure member 8 form a reinforcement post whereby.The extension 81 of this closure member 8 can be resisted against the top end of the cooling water passage 42 of cylinder head 4 to the spacing wall 44 between the firing chamber 41 whereby, by above-mentioned structure, this closure member 8 can form a strengthening action for cooling water passage 42 to the spacing wall between the firing chamber 41 44 of cylinder head 4, therefore the cooling water passage 42 of this cylinder head 4 to the spacing wall 44 between the firing chamber 41 can be implemented with thin wall thickness on the one hand, and closure member 8 also becomes a radiator, can promote the thermal diffusivity of cylinder head 4 whereby, on the other hand by closure member 8 for the strengthening action of the cooling water passage 42 of cylinder head 4 to the spacing wall 44 between the firing chamber 41, therefore the antiknock shake intensity for cylinder head 4 can promote greatly, and then has promoted cylinder head 4 and be equipped on spark plug 5 on the cylinder head 4, the serviceability of members such as suction valve 6 and outlet valve 7.

In sum, the utility model is by above-mentioned water cooling type engine Structure of cylinder head, can effectively solve the disappearance of existing cylinder head, and effectively the effect of intensity is shaken in lift cylinder 4 cooling heat dissipation and antiknock, further prolong the working life of engine, existing person promotes effect.

Claims (13)

1. water cooling type engine Structure of cylinder head, this engine includes a cylinder head at least, one cylinder body, be provided with cooling water passage in this cylinder head, at least wear three perforation that are communicated in the firing chamber on this cylinder head, to supply spark plug respectively, wearing of suction valve and outlet valve, the cooling water passage of cylinder head top is offered a sand outlet at least in addition, on this sand outlet, be sealed with closure member, it is characterized in that: this closure member lower end has extended the extension towards the firing chamber direction, and the extension of this closure member is resisted against the cooling water passage of cylinder head and the spacing wall place between the firing chamber.

2. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the bottom, extension of this closure member is provided with groove.

3. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the cooling water passage of this cylinder head to the top end of the wall between the firing chamber is provided with projection.

4. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: hole has been established in the extension of this closure member.

5. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the extension of this closure member is the section of an one-tenth difference shape.

6. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the extension of this closure member is various geometrical shapies.

7. water cooling type engine Structure of cylinder head as claimed in claim 6 is characterized in that: the extension of this closure member is into rectangular-shaped.

8. water cooling type engine Structure of cylinder head as claimed in claim 6 is characterized in that: the extension of this closure member is circular shape.

9. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the extension of this closure member is the ovalisation shape.

10. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the extension of this closure member has radiating fin.

11. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: the cooling water passage of this cylinder head to the top end of the wall between the firing chamber is provided with positioning seat.

12. water cooling type engine Structure of cylinder head as claimed in claim 11 is characterized in that: have groove on this positioning seat.

13. water cooling type engine Structure of cylinder head as claimed in claim 1 is characterized in that: this sand outlet is several.

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