CN202417729U - Universal high-efficiency low-emission cylinder head of petrol engine and petrol engine - Google Patents
Universal high-efficiency low-emission cylinder head of petrol engine and petrol engine Download PDFInfo
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- CN202417729U CN202417729U CN2011204933758U CN201120493375U CN202417729U CN 202417729 U CN202417729 U CN 202417729U CN 2011204933758 U CN2011204933758 U CN 2011204933758U CN 201120493375 U CN201120493375 U CN 201120493375U CN 202417729 U CN202417729 U CN 202417729U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a universal high-efficiency low-emission cylinder head of a petrol engine and the petrol engine. A combustor surface composed of arched smooth curved surfaces is formed on the inner side of a cylinder head body, an air inlet valve inclines towards an air inlet channel side from bottom to top, an air exhaust valve inclines towards an air exhaust channel side from bottom to top, an included angle formed by an air intake axis and an air exhaust axis is 24+/-5 degrees, parameters among the combustor, the air inlet valve and the air outlet valve are coordinated and matched mutually, the operating efficiency of the petrol engine is improved, the fuel is saved, the emission is reduced, outer engine purification methods such as a catalytic converter is not required, emission indexes reach and are far above requirements of an environmental protection agency (EPA) 3-stage standard, the petrol engine can be low in price and cost, flexible and portable and the power of the petrol engine can be raised by above 250 W, the fuel consumption rate can be reduced by 9%, and the minimum emission can reach 5g/kW.h and exceeds a standard of 8g/kW.h at a EPA 3-stage. The petrol engine improves power and reduces emission obviously.
Description
Technical field
The utility model relates to a kind of general dynamic machine parts and application thereof, particularly a kind of general gasoline engines parts and application thereof.
Background technique
General gasoline engines refers to except that automobile-used, aviation are used; Reciprocating piston type petrol engine with extensive use, general power is small utility gasoline engine with at 20kW, has stronger versatility; Be characterized in that volume is little and quality is little, it is easy and simple to handle to use, low price.General gasoline engines drives universal machine as one of power source, and universal machine comprises agricultural equipment for plant protection, graden machine, generator set, building machinery etc.General gasoline engines is a kind of dynamic power machine that uses gasoline for the fuel.Partly form by cylinder, connecting rod, gas distribution system, oil supply system, lubrication system and ignition system etc.; Cylinder head is provided with gas-entered passageway and exhaust passage, and forms the firing chamber face jointly with cylinder, thereby, belong to the parts of petrol engine outbalance.Gasoline act as a fuel with AIR MIXTURES in the firing chamber internal combustion, produce great amount of heat, be used for as driving energy.The parameter of firing chamber air inlet, exhaust and firing chamber is the necessary condition that guarantees the efficient operation of petrol engine.
In the existing technology, the firing chamber face of cylinder head generally adopts wedge-shaped structure, has bigger face on year-on-year basis, but this structure helps the installation of other accessory structure, such as valve assembly; If change firing chamber face structure, then can influence the layout of inlet and outlet door assembly.For overcoming the above problems, a kind of spherical combustion chamber structure has appearred, have less surface to volume ratio, the performance of petrol engine is had influence preferably; In order to adapt to the sphere chamber structure, intake valve and exhaust valve all adopt tilting; Yet; Chamber structure only is one of key structure that influences the petrol engine operation; The air inlet of inlet and exhaust valve and exhaust parameter also have material impact to the working efficiency and the discharging of petrol engine; Only adopt the sphere firing chamber and combine the inclined valve structure that the efficient of petrol engine or discharging are improved
Present stage; Along with global environmental requirement requires increasingly high; As: require to discharge the standard that just requires to reach the 3rd stage of Environmental Protection Agency (hereinafter to be referred as EPA3) for small utility gasoline engine in the U.S., and for reaching this standard, according to existing cylinder head technical specifications; Then catalytic converter need be used, just this emission standard can be reached.For small utility gasoline engine; Structure light and flexible, manufacture cost and user cost are low be its dominate the market the advantage that should have; And external purification means such as use catalytic converter can obviously cause the petrol engine cost to increase for middle-size and small-size petrol engine, lose market competition advantage, simultaneously; Can cause the increase of volume and weight, and lose the advantage of light and flexible; And; For this external purification means of catalytic converter, can not improve the combustion efficiency of motor itself, belong to passive processing waste gas; For the energy, do not reach the purpose of practicing thrift or rationally using, also can cause the increase by a relatively large margin of user cost and maintenance cost.
Therefore, need improve the parameter corresponding relation in the change existing technology between firing chamber and intake valve and the exhaust valve to the firing chamber of petrol engine cylinder head; And make mutual cooperation between the parameter, and be more conducive to the mixing and burning of combustion gas, improve the operational efficiency of petrol engine; Fuel saving; Reduce discharging, need not use external purification means such as catalytic converter, its exhaust index is reached and far above the requirement of EPA3 stage criterion; Be that petrol engine can keep low-cost and flexible light advantage simultaneously, accord with the demands of the market.
The model utility content
In view of this, the utility model provides a kind of general gasoline engines efficient low-discharging cylinder head and petrol engine thereof, the parameter corresponding relation in the change existing technology between firing chamber and intake valve and the exhaust valve; And make mutual cooperation between the parameter, and be more conducive to the mixing and burning of combustion gas, improve the operational efficiency of petrol engine; Fuel saving; Reduce discharging, need not use external purification means such as catalytic converter, its exhaust index is reached and far above the requirement of EPA3 stage criterion; Be that petrol engine can keep low-cost and flexible light advantage simultaneously, accord with the demands of the market.
The general gasoline engines efficient low-discharging cylinder head of the utility model; Comprise cylinder head body and the gas-entered passageway, exhaust passage and the spark plug mounting hole that are arranged at the cylinder head body, the inboard firing chamber face that forms of cylinder head body, said firing chamber face is the arch smooth surface; The corresponding intake valve that is provided with gas-entered passageway on the said cylinder head body; The corresponding exhaust valve that is provided with the exhaust passage, said intake valve by bottom to top to the gas-entered passageway tilt, exhaust valve by bottom to top to the exhaust passage tilt; Angle between said intake valve axis and the exhaust valve axis is 24 ± 5 °.
Further, face edge, said firing chamber is the circle identical and concentric with the cylinder diameter diameter; Relative with the internal diameter of cylinder body, in conjunction with the angle between firing chamber face structure and intake valve axis and the exhaust valve axis, can further strengthen the mixing and the burning of mixed gas, improve combustion efficiency, and reduce discharging; And and smooth surface firing chamber and inlet and exhaust valve and intake and exhaust air flue between angle adapt; Be convenient to organize air inlet and exhaust; Eliminate dead angle and carbon deposit, improve intake and exhaust efficient, eliminate the abundant mixing that existing chamber structure is unfavorable for combustion gas; Reduce composite rate, the drawback of influence burning and discharging.
Further; It is 68 ± 2 ° camber line that said firing chamber face cross central line and firing chamber face vertical center line are radian, and the curved surface between the end face line of the intersection of intersection, exhaust valve and the firing chamber face of firing chamber face cross central line, firing chamber face vertical center line, intake valve and firing chamber face and firing chamber face is through scanning formation; Angle between said intake valve axis and the exhaust valve axis is 24 °, and this angle combines with the firing chamber face structure of said structure, influences each other; Form preferable parameter proportioning, be convenient to roll stream and intake swirl, increase flow perturbation in the cylinder in the air inlet of cylinder inner tissue; Accelerate burning; And it is more abundant to burn, and is beneficial to burning and reduces the CH+NO discharging, increases petrol engine power; Simultaneously, make the angle between inlet and exhaust valve and the intake and exhaust air flue littler, effectively reduce the resistance of intake and exhaust than other structure firing chamber face; Make intake and exhaust more smooth and easy, improve petrol engine power effectively, further be beneficial to and reduce fuel consumption rate and discharging; Practice thrift driving source, power can improve more than the 250W, and fuel consumption rate reduces about 8%; Discharging reaches 5.5g/kW.h, surpasses the standard in EPA3 stage.
Further, said intake valve axis and exhaust valve axis be respectively perpendicular to the tangent plane of firing chamber face and its crosspoint, just the center line of the axes intersect of intake valve and exhaust valve face and cylinder diameter central lines in the firing chamber; Adapt with the intake and exhaust direction of firing chamber; Reduce resistance, increase the power character of petrol engine, be beneficial to further reduction and discharge the petrol engine dynamic test efficient height that the firing chamber face of this structure combines with above-mentioned inlet and exhaust valve angle; Reduce the generation of residual gas; Thereby discharge lowly, reduce fuel consume and reach more than 9%, enhancing power of gasoline engine surpasses more than the 250W than existing sphere firing chamber.
Further; Said intake valve and exhaust valve are respectively equipped with rocking arm; Be provided with two rocker arm brackets with two rocking arms are corresponding one by one on the said cylinder head body; Said two rocking arms are respectively equipped with the telescoping groove that supplies corresponding rocker arm bracket top to embed, and it is the lever construction of fulcrum that two rocking arms are articulated in by the pitman arm shaft single-degree-of-freedom of passing the telescoping groove two side that the rocker arm bracket top corresponding with it form with the pitman arm shaft respectively; Be provided with the hinged rocking arm of structure of telescoping groove through rocking arm; Can reduce the transverse dimension of rocker arm bracket greatly; Occupy less space, be applicable to that small volume, small displacement engine use, and avoid because the engine cylinder head area is not suitable for the structure that installs and fixes the hinged rocking arm of rocker arm bracket for a short time; Rocking arm is in running, and the play of its all directions or rolling momentum are little, and assurance inlet and outlet door assembly is closed the back good airproof performance; Move smooth and easy, thereby guarantee the normal operation of petrol engine, stressed and the inconsistent situation of traffic direction in the time of valve can not occurring and open and close; Guarantee sealing effect, thereby raise the efficiency energy saving; And the saving arrangement space, can effectively reduce the rate of fault of rocking arm, reduce maintenance cost; The reasonable Arrangement rocking arm is come in the position that is adapted to intake and exhaust, also is beneficial to guarantee to guarantee port timing valve timing, thereby improves performance and reduce discharging.
Further; Be positioned on the face of said firing chamber around the seat ring of intake valve with the seat ring that is positioned at exhaust valve and be respectively the concordant plane of seat ring inner end with the seat ring inner end and the exhaust valve of intake valve on every side, and the near point of face edge, firing chamber and intake valve and the exhaust valve formation local dent that adapts; Eliminate step, reduce interference, reduce resistance, eliminate the sudden change of dead angle and shape, guarantee the abundant burning of mixed gas, improve petrol engine efficient air inlet and exhaust; And because the mounting structure of intake valve and exhaust valve, and have corresponding angle, thereby the near point that is positioned at face edge, firing chamber need sink, then be positioned at firing chamber face adaptability and form and cave in.
Further, two pitman arm shafts radially inwardly are obliquely installed to the top with respect to cylinder head body attachment face, and the angle of inclination of said pitman arm shaft is corresponding identical with the angle of inclination of intake valve and exhaust valve; The pitman arm shaft that is obliquely installed can be adapted to the inclined valve structure and be adapted to the geometrical shape of sphere firing chamber, is beneficial to guarantee that rocking arm drives the harmony and the sealing of valve event, and drives smooth and easy.
Further, said intake valve axis and exhaust valve axis with respect to the firing chamber face along Boring mill to center line symmetry, the distributed architecture of intake valve and exhaust valve and firing chamber face adapt; Reach the cooperation of optimum structure parameter; The firing chamber face of this ratio is most effective with the petrol engine dynamic test that above-mentioned inlet and exhaust valve angle combines, and discharges minimumly, reduces fuel consume and reaches more than 9%; Enhancing power of gasoline engine surpasses more than the 250W than existing sphere firing chamber, and discharging reaches 5.3g/kW.h.
Further, the telescoping groove on said two rocking arms is groove, and the top of two rocker arm brackets is exposed through the telescoping groove corresponding with it and is respectively equipped with the oilhole that connects to pitman arm shaft.
The invention also discloses a kind of petrol engine of using general gasoline engines efficient low-discharging cylinder head, said general gasoline engines efficient low-discharging cylinder head is installed on petrol engine.
The beneficial effect of the utility model: the general gasoline engines efficient low-discharging cylinder head and the petrol engine thereof of the utility model, adopt the arch smooth surface structure firing chamber face that comprises sphere or many spheres, when reducing surface to volume ratio; Parameter corresponding relation in the change existing technology between firing chamber and intake valve and the exhaust valve, and make mutual cooperation between the parameter, choose reasonable surface to volume ratio; Be more conducive to the mixing and burning of combustion gas; Improve the operational efficiency of petrol engine, fuel saving reduces discharging; Need not use external purification means such as catalytic converter; Its exhaust index being reached and far above the requirement of EPA3 stage criterion, is that petrol engine can keep low-cost and light advantage flexibly simultaneously, accords with the demands of the market;
The utility model is when combustion chamber surface to volume ratio further reduces, and the angle of rational Match intake valve and exhaust valve makes the angle between inlet and exhaust valve and the intake and exhaust air flue littler than other structure firing chamber face; Effectively reduce the resistance of intake and exhaust; Make intake and exhaust more smooth and easy, improve petrol engine power effectively, further be beneficial to and reduce fuel consumption rate and discharging; Power can improve more than the 250W; Fuel consumption rate reduces by 9%, discharge minimumly to reach 5g/kW.h for reaching to discharge, above the standard of EPA3 stage 8g/kW.h; This shows that the petrol engine power of the utility model improves and discharging reduces comparatively obvious.
The cylinder head of the utility model is used for small utility gasoline engine, and energy saving also reduces consumption.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the utility model cylinder head firing chamber and valve arrangement structure schematic representation;
Fig. 2 is the utility model cylinder head rocking arm layout schematic representation;
Fig. 3 is the utility model rocker arm bracket layout schematic representation;
Fig. 4 is a pitman arm shaft and the view in transverse section that cooperates of rocker arm bracket;
Fig. 5 is a cylinder head firing chamber face schematic representation.
Embodiment
Fig. 1 is the utility model cylinder head firing chamber and valve arrangement structure schematic representation; Fig. 2 is the utility model cylinder head rocking arm layout schematic representation; Fig. 3 is the utility model rocker arm bracket layout schematic representation, and Fig. 4 is a pitman arm shaft and the view in transverse section that cooperates of rocker arm bracket, and Fig. 5 is a cylinder head firing chamber face schematic representation; As shown in the figure: the general gasoline engines efficient low-discharging cylinder head of present embodiment; Comprise cylinder head body 1 and the gas-entered passageway 9, exhaust passage 5 and the spark plug mounting hole 8 that are arranged at cylinder head body 1, the inboard firing chamber face 7 that forms of cylinder head body, said firing chamber face 7 is the arch smooth surface; The arch smooth surface here comprises the arcuate surface that spherical and complex spherical face constitute, and also comprises the arcuate surface that smoothed curves such as parabola, hyperbola constitute; On the said cylinder head body 1 with the gas-entered passageway 9 corresponding intake valves 11 that are provided with, with the exhaust passage 5 corresponding exhaust valves 4 that are provided with, said intake valve 11 by bottom to top to gas-entered passageway 9 tilt, exhaust valve 4 by bottom to top to exhaust passage 5 tilt; Angle between said intake valve 11 axis and exhaust valve 4 axis is 24 ± 5 °.
In the present embodiment, face 7 edges, said firing chamber are the circle identical and concentric with the cylinder diameter diameter, and the edge is meant the intersection of the end face that firing chamber face and cylinder head body are connected with cylinder body; Relative with the internal diameter of cylinder body, in conjunction with the angle between firing chamber face 7 structures and intake valve 11 axis and exhaust valve 4 axis, can further strengthen the mixing and the burning of mixed gas, improve combustion efficiency, and reduce discharging; And and smooth surface firing chamber and inlet and exhaust valve and intake and exhaust air flue between angle adapt; Be convenient to organize air inlet and exhaust; Eliminate dead angle and carbon deposit, improve intake and exhaust efficient, eliminate the abundant mixing that existing chamber structure is unfavorable for combustion gas; Reduce composite rate, the drawback of influence burning and discharging.
In the present embodiment; It is 68 ± 2 ° camber line that said firing chamber face 7 cross central line d and firing chamber face 7 vertical center line c are radian; Cross central line d is meant and intake valve 11 center lines and the identical direction of exhaust valve 4 center line lines that vertical center line c makes and refers to be positioned at and intake valve 11 center lines and the vertical direction of exhaust valve 4 center line lines; Curved surface between the end face line g of the intersection f of intersection e, exhaust valve 4 and the firing chamber face of firing chamber face cross central line d, firing chamber face vertical center line c, intake valve 11 and firing chamber face and firing chamber face is through scanning formation; Angle between said intake valve axis and the exhaust valve axis is 24 °, scans to be meant and to utilize the function of scanning of cartographic software (such as three-dimensional software) to obtain the curved surface expected; This angle combines with the firing chamber face structure of said structure, influences each other, and forms preferable parameter proportioning; Be convenient to roll stream and intake swirl in the air inlet of cylinder inner tissue; Increase flow perturbation in the cylinder, accelerate burning, and burning is more abundant; Be beneficial to burning and reduce the CH+NO discharging, increase petrol engine power; Simultaneously, make the angle between inlet and exhaust valve and the intake and exhaust air flue littler, effectively reduce the resistance of intake and exhaust than other structure firing chamber face; Make intake and exhaust more smooth and easy, improve petrol engine power effectively, further be beneficial to and reduce fuel consumption rate and discharging; Practice thrift driving source, power can improve more than the 250W, and fuel consumption rate reduces about 8%; Discharging reaches 5.5g/kW.h, surpasses the standard in EPA3 stage.。
In the present embodiment, said intake valve 11 axis and exhaust valve 4 axis are respectively perpendicular to firing chamber face 7 tangent plane with its crosspoint, just the center line of the axes intersect of intake valve 11 and exhaust valve 4 face and cylinder diameter central lines in the firing chamber; Adapt with the intake and exhaust direction of firing chamber; Reduce resistance, increase the power character of petrol engine, be beneficial to further reduction and discharge the petrol engine dynamic test efficient height that the firing chamber face of this structure combines with above-mentioned inlet and exhaust valve angle; Reduce the generation of residual gas; Thereby discharge lowly, reduce fuel consume and reach more than 9%, enhancing power of gasoline engine surpasses more than the 250W than existing sphere firing chamber.
In the present embodiment; Said intake valve 11 is respectively equipped with rocking arm (inlet valve rocker 13 and exhaust valve rocker arm 16 as shown in the figure) with exhaust valve 4; On the said cylinder head body 1 with corresponding one by one two rocker arm brackets (inlet valve rocker seat 12 and exhaust valve rocker arm seat 17) that are provided with of two rocking arms (inlet valve rocker 13 with exhaust valve rocker arm 16); Said two rocking arms (inlet valve rocker 13 and exhaust valve rocker arm 16) are respectively equipped with the telescoping groove that supplies corresponding rocker arm bracket top to embed; Two rocking arms (inlet valve rocker 13 and exhaust valve rocker arm 16) are articulated in the rocker arm bracket corresponding with it (inlet valve rocker seat 12 and exhaust valve rocker arm seat 17) top by the pitman arm shaft that passes the telescoping groove two side (inlet valve rocker axle 14 and exhaust valve rocker arm axle 15) single-degree-of-freedom respectively; Formation is the lever construction of fulcrum with pitman arm shaft (inlet valve rocker axle 14 and exhaust valve rocker arm axle 15); As shown in the figure; The power point of two lever constructions is by each self-corresponding top rod driving; The resistance point of two lever constructions is opened or is closed intake valve 11 or exhaust valve 4 being applied to respectively, forms stable driving structure, for reducing rotational resistance; Telescoping groove on said two rocking arms (inlet valve rocker 13 with exhaust valve rocker arm 16) is groove, and the top of two rocker arm brackets (inlet valve rocker seat 12 and exhaust valve rocker arm seat 17) is exposed through the telescoping groove corresponding with it and is respectively equipped with the oilhole (being intake rocker seat oilhole 18 and exhaust rocker arm seat oilhole 19 among the figure) that connects to pitman arm shaft; Oilhole on said inlet valve rocker seat 12 and the exhaust valve rocker arm seat 17 (intake rocker seat oilhole 18 and exhaust rocker arm seat oilhole 19) is used to make lubricant oil to get into the rubbing surface between inlet valve rocker axle 14 and exhaust valve rocker arm axle 15 and inlet valve rocker seat 12 and the exhaust valve rocker arm seat 17; Reduce friction factor, increase the running precision and the stability of rocking arm; Be provided with the hinged rocking arm of structure of telescoping groove through rocking arm; Can reduce the transverse dimension of rocker arm bracket greatly; Occupy less space, be applicable to that small volume, small displacement engine use, and avoid because the engine cylinder head area is not suitable for the structure that installs and fixes the hinged rocking arm of rocker arm bracket for a short time; The rocking arm of the utility model is in running, and the play of its all directions or rolling momentum are little, can effectively reduce the rate of fault of rocking arm, reduces maintenance cost; The reasonable Arrangement rocking arm is come in the position that is adapted to intake and exhaust, also is beneficial to guarantee to guarantee port timing valve timing, thereby improves performance and reduce discharging.
In the present embodiment, be positioned on the said firing chamber face 7 around the seat ring 10 of intake valve 11 with the seat ring that is positioned at exhaust valve 43 and be respectively the concordant plane of seat ring 3 inner ends with seat ring 10 inner ends and the exhaust valve 4 of intake valve 11 on every side; And the formation local dent that adapts of the curved surface between the near point of face edge, firing chamber and intake valve 11 and exhaust valve 4, depression a as shown in the figure and depression b; Near point is meant the points of proximity; Eliminate step, reduce interference, reduce resistance, eliminate the sudden change of dead angle and shape, guarantee the abundant burning of mixed gas, improve petrol engine efficient air inlet and exhaust; And because the mounting structure of intake valve and exhaust valve, and have corresponding angle, thereby the near point that is positioned at face edge, firing chamber need sink, then be positioned at firing chamber face adaptability and form and cave in.
In the present embodiment, two pitman arm shafts (inlet valve rocker axle 14 and exhaust valve rocker arm axle 15) radially inwardly are obliquely installed to the top with respect to cylinder head body attachment face, radially inwardly be meant by around the cylinder head to the direction of its radial centre lines; The angle of inclination of said pitman arm shaft (inlet valve rocker axle 14 and exhaust valve rocker arm axle 15) is corresponding identical with the angle of inclination of intake valve and exhaust valve; The pitman arm shaft that is obliquely installed (inlet valve rocker axle 14 and exhaust valve rocker arm axle 15) can be adapted to the inclined valve structure and be adapted to the geometrical shape of sphere firing chamber, is beneficial to and guarantees that rocking arm drives the harmony and the sealing of valve event, and drive smooth and easy; In order to be adapted to the angle of inclination of intake valve and exhaust valve, radially relative tilt setting of two rocker arm brackets (inlet valve rocker seat 12 and exhaust valve rocker arm seat 17) has adaptability preferably, makes the cylinder head structure more compact simultaneously.
In the present embodiment; Said intake valve 11 axis and exhaust valve 4 axis with respect to the firing chamber face along Boring mill to center line symmetry; The distributed architecture of intake valve and exhaust valve and firing chamber face adapt, and reach the cooperation of optimum structure parameter, and the firing chamber face of this ratio is most effective with the petrol engine dynamic test that above-mentioned inlet and exhaust valve angle combines; Discharge minimum; Reduce fuel consume and reach more than 9%, enhancing power of gasoline engine surpasses more than the 250W than existing sphere firing chamber, and discharging reaches 5.3g/kW.h.
In the present embodiment, be positioned at the air-cooled passage 2 of spark plug that spark plug mounting hole 8 sides are provided with perforation on the said cylinder head body 1; Make that through air-cooled spark plug and cylinder body itself are cooled off preferably, avoid occurring that spark plug reduces the problem in working life in the existing technology owing to high temperature.
In the present embodiment, said cylinder head body 1 outer surface is provided with radiating fin 6, and said radiating fin 6 extends to exhaust passage 5 outer walls; Can effectively reduce delivery temperature, be beneficial to the vent gas treatment parts in the protection vent systems, further reduce discharging, be beneficial to environmental protection.
The invention also discloses a kind of petrol engine of using general gasoline engines efficient low-discharging cylinder head; Said general gasoline engines efficient low-discharging cylinder head is installed on petrol engine; Said petrol engine is applied to universal machine, and universal machine comprises agricultural equipment for plant protection, graden machine, generator set, building machinery etc.
Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the aim and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (10)
1. general gasoline engines efficient low-discharging cylinder head; Comprise cylinder head body and the gas-entered passageway, exhaust passage and the spark plug mounting hole that are arranged at the cylinder head body, the inboard firing chamber face that forms of cylinder head body, it is characterized in that: said firing chamber face is the arch smooth surface; The corresponding intake valve that is provided with gas-entered passageway on the said cylinder head body; The corresponding exhaust valve that is provided with the exhaust passage, said intake valve by bottom to top to the gas-entered passageway tilt, exhaust valve by bottom to top to the exhaust passage tilt; Angle between said intake valve axis and the exhaust valve axis is 24 ± 5 °.
2. general gasoline engines efficient low-discharging cylinder head according to claim 1 is characterized in that: face edge, said firing chamber is the circle identical and concentric with the cylinder diameter diameter.
3. general gasoline engines efficient low-discharging cylinder head according to claim 1 and 2; It is characterized in that: it is 68 ± 2 ° camber line that said firing chamber face cross central line and firing chamber face vertical center line are radian, and the curved surface between the end face line of the intersection of intersection, exhaust valve and the firing chamber face of firing chamber face cross central line, firing chamber face vertical center line, intake valve and firing chamber face and firing chamber face is through scanning formation; Angle between said intake valve axis and the exhaust valve axis is 24 °.
4. general gasoline engines efficient low-discharging cylinder head according to claim 3 is characterized in that: said intake valve axis and exhaust valve axis are respectively perpendicular to the tangent plane of firing chamber face and its crosspoint.
5. general gasoline engines efficient low-discharging cylinder head according to claim 4; It is characterized in that: said intake valve and exhaust valve are respectively equipped with rocking arm; Be provided with two rocker arm brackets with two rocking arms are corresponding one by one on the said cylinder head body; Said two rocking arms are respectively equipped with the telescoping groove that supplies corresponding rocker arm bracket top to embed, and it is the lever construction of fulcrum that two rocking arms are articulated in by the pitman arm shaft single-degree-of-freedom of passing the telescoping groove two side that the rocker arm bracket top corresponding with it form with the pitman arm shaft respectively.
6. general gasoline engines efficient low-discharging cylinder head according to claim 5; It is characterized in that: be positioned on the face of said firing chamber around the seat ring of intake valve with the seat ring that is positioned at exhaust valve and be respectively the concordant plane of seat ring inner end with the seat ring inner end and the exhaust valve of intake valve on every side, and the near point of face edge, firing chamber and intake valve and the exhaust valve formation local dent that adapts.
7. general gasoline engines efficient low-discharging cylinder head according to claim 6; It is characterized in that: two pitman arm shafts radially inwardly are obliquely installed to the top with respect to cylinder head body attachment face, and the angle of inclination of said pitman arm shaft is corresponding identical with the angle of inclination of intake valve and exhaust valve.
8. general gasoline engines efficient low-discharging cylinder head according to claim 7 is characterized in that: said intake valve axis and exhaust valve axis with respect to the firing chamber face along Boring mill to center line symmetry.
9. general gasoline engines efficient low-discharging cylinder head according to claim 8; It is characterized in that: the telescoping groove on said two rocking arms is groove, and the top of two rocker arm brackets is exposed through the telescoping groove corresponding with it and is respectively equipped with the oilhole that connects to pitman arm shaft.
10. an application rights requires the petrol engine of the described general gasoline engines efficient low-discharging of 1 to 9 arbitrary claim cylinder head, and it is characterized in that: said general gasoline engines efficient low-discharging cylinder head is installed on petrol engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204933758U CN202417729U (en) | 2011-12-01 | 2011-12-01 | Universal high-efficiency low-emission cylinder head of petrol engine and petrol engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204933758U CN202417729U (en) | 2011-12-01 | 2011-12-01 | Universal high-efficiency low-emission cylinder head of petrol engine and petrol engine |
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| Publication Number | Publication Date |
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| CN202417729U true CN202417729U (en) | 2012-09-05 |
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| CN2011204933758U Expired - Fee Related CN202417729U (en) | 2011-12-01 | 2011-12-01 | Universal high-efficiency low-emission cylinder head of petrol engine and petrol engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518527A (en) * | 2011-12-01 | 2012-06-27 | 隆鑫通用动力股份有限公司 | Mini-universal petrol engine cylinder head and petrol engine thereof |
| CN109707500A (en) * | 2019-01-07 | 2019-05-03 | 浙江康思特动力机械有限公司 | The combustion chamber of multivalve engine and valve arrangement structure |
| WO2023141789A1 (en) * | 2022-01-25 | 2023-08-03 | 浙江春风动力股份有限公司 | Engine |
-
2011
- 2011-12-01 CN CN2011204933758U patent/CN202417729U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518527A (en) * | 2011-12-01 | 2012-06-27 | 隆鑫通用动力股份有限公司 | Mini-universal petrol engine cylinder head and petrol engine thereof |
| CN109707500A (en) * | 2019-01-07 | 2019-05-03 | 浙江康思特动力机械有限公司 | The combustion chamber of multivalve engine and valve arrangement structure |
| WO2023141789A1 (en) * | 2022-01-25 | 2023-08-03 | 浙江春风动力股份有限公司 | Engine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20161201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |