CN102926884A - Cylinder head of general gasoline engine - Google Patents
Cylinder head of general gasoline engine Download PDFInfo
- Publication number
- CN102926884A CN102926884A CN2012104670484A CN201210467048A CN102926884A CN 102926884 A CN102926884 A CN 102926884A CN 2012104670484 A CN2012104670484 A CN 2012104670484A CN 201210467048 A CN201210467048 A CN 201210467048A CN 102926884 A CN102926884 A CN 102926884A
- Authority
- CN
- China
- Prior art keywords
- air outlet
- cylinder head
- outlet flue
- intake duct
- interior
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a cylinder head of a general gasoline engine. An air inlet passage and an air outlet passage are arranged at two sides above a combustion chamber (2) respectively; the height (H1) of the minimum section at the connection of an external air inlet passage (4) and an internal air inlet passage (5) is 16-17mm; an angle of inclination a of an axis of the air inlet passage, at an installing surface of the cylinder head, is 25.6-26 degrees, and an angle of inclination b of the axis of the air inlet passage, at an axial horizontal direction of a cylinder, is 14-14.4 degrees; the maximum diameter at the bottom of an inlet valve (6) is 27.5-28.5mm; and the height (H2) of the minimum section at the connection of an external air outlet passage (7) and an internal air outlet passage (8) is 15-16mm. The cylinder head provided by the invention is used to increase air inflow effectively, decrease loss of flow velocity of airflow, and simultaneously exhaust waste gas generated by combustion as far as possible, thereby improving dynamic property and economy of the engine.
Description
Technical field
The invention belongs to technical field of engines, specifically, the particularly cylinder head on the general gasoline engines.
Background technique
The effect of cylinder head is sealing cylinder, forms the firing chamber with piston head.Petrol engine is comprised of intake valve, exhaust valve, intake duct, air outlet flue and firing chamber etc. with cylinder head.The right and left at cylinder head arranges the inlet and outlet road, and the bottom is basin shaped combustion chamber, inlet and outlet door at right angle setting, and with the cylinder parallel to an axis.Wherein, intake duct is in intake valve one side, and intake valve is separated intake duct, forms external admission road and interior intake duct.Air outlet flue is in exhaust valve one side, and exhaust valve is separated air outlet flue, forms outer air outlet flue and interior air outlet flue.Mixed gas enters intake duct, enters the firing chamber behind the IO Intake Valve Opens and carries out ignition, and the waste gas of generation enters air outlet flue by the unlatching of exhaust valve, is drained in the atmosphere again.Flowing of the shape meeting appreciable impact mixed gas of intake duct, charging efficiency and burning quality, and then affect the power character of motor, economical and discharging.The shape of air outlet flue can affect exhaust resistance, as much as possible waste gas is all discharged motor, avoids secondary combustion, affects the power character of motor.
The existing deficiency of cylinder head of existing general gasoline engines is:
1) the external admission road is with to be connected the connection sudden change of intake duct larger, and intake resistance is large, and flow rate attenuation is large, can affect gas flow, and volumetric efficiency is reduced, thereby affects the power character of motor.
2) outer air outlet flue is with to be connected the connection sudden change of air outlet flue larger, and exhaust resistance is large, and it is slow that cylinder pressure descends, and increased the exhaust power loss; And when high engine speeds turned round, waste gas can't be got rid of fully, and the waste gas of generation is inhaled into again the firing chamber secondary combustion, can affect power character and the Economy of motor.
3) the intake valve diameter is smaller, the air inflow that can not satisfy the demand.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of gas cylinder head of universal petrol engine of energy Effective Raise engine power performance.
Technological scheme of the present invention is as follows: a kind of gas cylinder head of universal petrol engine, be provided with firing chamber (2) in the bottom of cylinder head body (1), the both sides of top, this firing chamber (2) arrange respectively intake duct and air outlet flue, intake valve (3) is separated intake duct, form external admission road (4) and interior intake duct (5), exhaust valve (6) is separated air outlet flue, form outer air outlet flue (7) and interior air outlet flue (8), described external admission road (4) is 16-17mm with the smallest cross-sectional height (H1) of interior intake duct (5) joint; The axis inclination angle of described intake duct is a in cylinder head attachment face direction, and this a is 25.6-26 °, is b at cylinder axis to substantially horizontal, and this b is 14-14.4 °; The diameter of described intake valve (6) bottom biggest place is 27.5-28.5mm; Described outer air outlet flue (7) is 15-16mm with the smallest cross-sectional height (H2) of interior air outlet flue (8) joint.
The present invention keeps substantially constant with external admission road and interior intake duct joint smallest cross-sectional width, and height becomes 16-17mm by 14.5mm, and the intake duct smallest cross-sectional is shaped as irregular D type.After engine speed improved, to the requirement raising of intake swirl, because the Velocity Profiles at traditional cylinder head inlet valve port place is uneven, in fact the valve circulation area was not fully utilized, and airway resistance can increase very fast.So by exterior air drain joint minimum cross-sectional area in increasing, shape sudden change between external admission road and the interior intake duct is reduced, such one is to have strengthened charge air flow to enter interior intake duct, the 2nd, make charge air flow enter the firing chamber by intake valve equably, the 3rd, reduced intake resistance, reduced the loss of air-flow velocity.Simultaneously, correspondingly adjust the R angle of inside and outside intake duct joint, make the shape transition here straight, can further reduce the loss of air-flow velocity.
The present invention keeps substantially constant with outer air outlet flue and interior air outlet flue joint smallest cross-sectional width, and height becomes 15-16mm by 12.5mm, and the air outlet flue smallest cross-sectional is shaped as irregular D type.After engine speed improved, the exhaust airstream flow velocity is corresponding increase also, in the situation that do not change the cylinder head volume, made the sectional area of air outlet flue become large as far as possible.So by increasing the minimum cross-sectional area of air outlet flue, the waste gas that burning is produced discharges more; By reducing the shape sudden change between outer air outlet flue and the interior air outlet flue, strengthened air displacement.
The present invention is increased to 27.5-28.5mm with the diameter of intake valve bottom biggest place by 26.Because the flow area between intake valve and the inlet valve seat ring is the place that the air inlet runner middle section is minimum, flow velocity is the highest, the local resistance that therefore should locate is maximum.Especially after engine speed improved, induction air flow ratio increased, and also the gas choking phenomenon can occur here.Therefore by strengthening the diameter of intake valve bottom biggest place, can reduce the gas flow rate when flowing through the intake valve sectional area, thereby reduce the local flow resistance, improve volumetric efficiency.
The present invention is increased to 25.6-26 ° in X-axis direction (cylinder head attachment face) by 24.3 ° with intake duct axis inclination angle, and Y direction (the axial substantially horizontal of cylinder) is increased to 14-14.4 ° by 13 °.After the axial inclination of suitable increase engine inlets, the sudden change local air flow resistance of the joint between external admission road and the interior intake duct reduces, and has improved thus stream swirl and has rolled strength of flow, and the air flow rate of intake duct is increased.
As the embodiment of the best, described external admission road (4) is 16.5mm with the smallest cross-sectional height (H1) of interior intake duct (5) joint; The axis inclination angle in described external admission road (4) is 25.8 ° at cylinder head attachment face direction a, is 14.2 ° at cylinder axis to substantially horizontal b; The diameter of described intake valve (6) bottom biggest place is 28mm; Described outer air outlet flue (7) is 15.5mm with the smallest cross-sectional height (H2) of interior air outlet flue (8) joint.
Beneficial effect: the present invention can effectively increase air inflow, reduces the air-flow velocity loss, and the waste gas that can as much as possible burning be produced simultaneously discharges, thereby has improved power character and the Economy of motor.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the plan view of Fig. 1.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, the cylinder head of general gasoline engines has cylinder head body 1, and the bottom of this cylinder head body 1 offers firing chamber 2, and firing chamber 2 is the basin type.Left side above firing chamber 2 arranges intake duct, and the right side arranges air outlet flue, and the inlet and outlet road all is connected with firing chamber 2.Intake valve 3 and exhaust valve 6 are installed on described cylinder head body 1 side by side, and the shaft axis of intake valve 3 parallels with the shaft axis of exhaust valve 6, and intake valve 3 and exhaust valve 6 all with cylinder (not shown in FIG.) parallel to an axis.
As shown in Figure 1 and Figure 2, intake valve 3 is separated intake duct, form external admission road 4 and interior intake duct 5, external admission road 4 is shaped as irregular D type with interior intake duct 5 joint smallest cross-sectional, and external admission road 4 is 16-17mm with the smallest cross-sectional height H 1 of interior intake duct 5 joints, and the present embodiment is preferably 16.5mm.The axis inclination angle of described intake duct is a in cylinder head attachment face direction, and this a is 25.6-26 °, is preferably 25.8 ° in the present embodiment; Be b at cylinder axis to substantially horizontal, this b is 14-14.4 °, is preferably 14.2 ° in the present embodiment.The diameter of described intake valve 6 bottom biggest places is 27.5-28.5mm, and the present embodiment is preferably 28mm.Exhaust valve 6 is separated air outlet flue, forms outer air outlet flue 7 and interior air outlet flue 8, and described outer air outlet flue 7 is 15-16mm with the smallest cross-sectional height H 2 of interior air outlet flue 8 joints, and the present embodiment is preferably 15.5mm.
Claims (2)
1. gas cylinder head of universal petrol engine, be provided with firing chamber (2) in the bottom of cylinder head body (1), the both sides of top, this firing chamber (2) arrange respectively intake duct and air outlet flue, intake valve (3) is separated intake duct, form external admission road (4) and interior intake duct (5), exhaust valve (6) is separated air outlet flue, form outer air outlet flue (7) and interior air outlet flue (8), it is characterized in that: described external admission road (4) is 16-17mm with the smallest cross-sectional height (H1) of interior intake duct (5) joint; The axis inclination angle of described intake duct is a in cylinder head attachment face direction, and this a is 25.6-26 °, is b at cylinder axis to substantially horizontal, and this b is 14-14.4 °; The diameter of described intake valve (6) bottom biggest place is 27.5-28.5mm; Described outer air outlet flue (7) is 15-16mm with the smallest cross-sectional height (H2) of interior air outlet flue (8) joint.
2. gas cylinder head of universal petrol engine according to claim 1 is characterized in that: described external admission road (4) is 16.5mm with the smallest cross-sectional height (H1) of interior intake duct (5) joint; The axis inclination angle in described external admission road (4) is 25.8 ° at cylinder head attachment face direction a, is 14.2 ° at cylinder axis to substantially horizontal b; The diameter of described intake valve (6) bottom biggest place is 28mm; Described outer air outlet flue (7) is 15.5mm with the smallest cross-sectional height (H2) of interior air outlet flue (8) joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104670484A CN102926884A (en) | 2012-11-19 | 2012-11-19 | Cylinder head of general gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104670484A CN102926884A (en) | 2012-11-19 | 2012-11-19 | Cylinder head of general gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102926884A true CN102926884A (en) | 2013-02-13 |
Family
ID=47641786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104670484A Pending CN102926884A (en) | 2012-11-19 | 2012-11-19 | Cylinder head of general gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102926884A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090173307A1 (en) * | 2008-01-08 | 2009-07-09 | Mazda Motor Corporation | Internal combustion engine |
| CN101649789A (en) * | 2008-08-14 | 2010-02-17 | 力帆实业(集团)股份有限公司 | Cylinder head of internal combustion engine |
| CN202250441U (en) * | 2011-09-17 | 2012-05-30 | 常州坛柴机电有限公司 | Die-casting cylinder cover of single-cylinder air-cooled diesel engine |
| CN102518503A (en) * | 2011-12-19 | 2012-06-27 | 力帆实业(集团)股份有限公司 | Gas passage and combustion chamber structure of three-valve engine |
| CN202946255U (en) * | 2012-11-19 | 2013-05-22 | 力帆实业(集团)股份有限公司 | Cylinder end air passage structure |
-
2012
- 2012-11-19 CN CN2012104670484A patent/CN102926884A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090173307A1 (en) * | 2008-01-08 | 2009-07-09 | Mazda Motor Corporation | Internal combustion engine |
| CN101649789A (en) * | 2008-08-14 | 2010-02-17 | 力帆实业(集团)股份有限公司 | Cylinder head of internal combustion engine |
| CN202250441U (en) * | 2011-09-17 | 2012-05-30 | 常州坛柴机电有限公司 | Die-casting cylinder cover of single-cylinder air-cooled diesel engine |
| CN102518503A (en) * | 2011-12-19 | 2012-06-27 | 力帆实业(集团)股份有限公司 | Gas passage and combustion chamber structure of three-valve engine |
| CN202946255U (en) * | 2012-11-19 | 2013-05-22 | 力帆实业(集团)股份有限公司 | Cylinder end air passage structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205013163U (en) | Height rolls rascally says and engine | |
| CN209212376U (en) | Supercharged direct-injection engine air intake duct | |
| CN103867289A (en) | Variable intake manifold for internal combustion engine and variable air intake device using the same | |
| CN202946255U (en) | Cylinder end air passage structure | |
| CN201794675U (en) | Squeeze-flow type compact combustion system with high compression ratio | |
| CN201148929Y (en) | Air-intake system of diesel | |
| CN205876480U (en) | Can strengthen engine intake swirl's compound tangential gas inlet way | |
| WO2017143633A1 (en) | Combined air inlet system and method for rotor engine with variable air inlet pipe | |
| CN201991666U (en) | Gas inlet passage of engine | |
| CN209212375U (en) | Air inlet path for diesel engine | |
| CN204591503U (en) | Direct spray petrol engine in cylinder cylinder | |
| CN106065808A (en) | A kind of compound tangential inlet duct strengthening engine charge eddy current | |
| CN201206502Y (en) | Small-sized petrol engine cylinder cover | |
| CN201568152U (en) | Air-passage structure of gasoline direct injection engine | |
| CN202360235U (en) | Intake port structure of small general gasoline engine | |
| CN201934229U (en) | Double-tangential air inlet passage of four-valve cylinder diesel engine | |
| CN102926884A (en) | Cylinder head of general gasoline engine | |
| CN203962232U (en) | The air inlet duct part of improvement | |
| CN102787936A (en) | Low-swirl-rate spiral air inlet passage of diesel | |
| CN202883180U (en) | Air inlet structure of supercharged engine | |
| CN102518503B (en) | Gas passage and combustion chamber structure of three-valve engine | |
| CN203570447U (en) | Air intake and exhaust duct structure of motorcycle air cylinder cover | |
| CN203488285U (en) | Air inlet pipe and engine with air inlet pipe | |
| CN204755065U (en) | A engine for on motor vehicle | |
| CN209340068U (en) | A kind of high-performance air passage structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130213 |