CN201546800U - Combustion chamber of small-displacement engine - Google Patents
Combustion chamber of small-displacement engine Download PDFInfo
- Publication number
- CN201546800U CN201546800U CN2009201413701U CN200920141370U CN201546800U CN 201546800 U CN201546800 U CN 201546800U CN 2009201413701 U CN2009201413701 U CN 2009201413701U CN 200920141370 U CN200920141370 U CN 200920141370U CN 201546800 U CN201546800 U CN 201546800U
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- China
- Prior art keywords
- plane
- exhaust valve
- firing chamber
- displacement engine
- small displacement
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- 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.)
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Combustion Methods Of Internal-Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to the field of combustion chambers of engines, and discloses a combustion chamber of a small-displacement engine, which comprises a cylinder body, an intake valve, an exhaust valve, a cylinder cover, a spark plug and a piston; the cylinder cover is provided with an inclined surface and a circular arc-shaped surface with different gradients, and the inclined surface and the circular arc-shaped surface form a roof shape; the head of the piston is in a bowl shape; the intake valve and the exhaust valve are respectively arranged on the inclined surface on the cylinder cover; and the spark plug is arranged between the exhaust valve and the intake valve and on one side of the exhaust valve. The combustion chamber of the small-displacement engine has the benefits of compacter structure, higher compression ratio and smaller area ratio, lower heat loss, adopts a double-intake and double-exhaust valve deployment method, reasonably deploys the head of the valve, improves the intake and exhaust effect of the engine, so as to improve the power and other performance indexes of the engine.
Description
Technical field
The utility model relates to the engine chamber field, particularly a kind of firing chamber of small displacement engine.
Background technique
When usually piston being moved to compression top center, the firing chamber that piston-top surface is above, following formed space, cylinder head bottom surface is called motor, the structure of engine chamber is directly connected to mixing and the combustion process of inflammable mixture in cylinder, therefore, to engine power performance, economic performance and emission level important influence.At present, the firing chamber of conventional engines, common shape mainly contains hemispherical combustion chamber, bathtub section combustion chamber L, wedge-section combustion chamber etc., all exist in varying degrees that certain structure is compact inadequately, compression ratio is little, combustion chamber surface to volume ratio is big, flame travel is long, shortcomings such as air motion is strong inadequately in the cylinder, that particularly embodies on small displacement engine is apparent in view.The result often causes the combustion characteristic of motor not ideal enough, can't satisfy at present the requirement to power performance, economic performance and the emission level of small displacement engine.Because the irreqularity of firing chamber, the main at present titration that adopts of the method for measurement of cylinder head combustion chamber volume, titration is at the cylinder head assembly that assembles inlet and outlet door and spark plug, in the firing chamber, drip kerosene by burette, by measuring the volume of burette titration kerosene, draw combustion chamber volume.The shortcoming of titration is that program is many, need take a long time, and the needs of incompatibility mass production have reduced manufacturing efficiency.
Summary of the invention
In order to solve the problems of the prior art, the utility model proposes a kind of high compression engine firing chamber that has the combustion chamber volume measuring ability, solve the not good and combustion chamber volume of firing effect that the small displacement engine firing chamber in use exists and measure too problems such as complexity.
The technological scheme that the prior art problem that solves the utility model is adopted is: design and make a kind of firing chamber of small displacement engine, comprise cylinder block, intake valve, exhaust valve, cylinder head, spark plug and piston; Described cylinder head is provided with the inclined-plane and the arc surface of different gradient, and described inclined-plane and arc surface constitute ridge shape; The head of described piston is the bowl type; Described intake valve and exhaust valve lay respectively on the inclined-plane on the described cylinder head; Described spark plug is between described exhaust valve and intake valve and be positioned at described exhaust valve one side.
The utility model further improves: described exhaust valve and described intake valve are respectively symplex structure.
The utility model further improves: described intake valve is positioned on the less relatively inclined-plane of described cylinder head upgrade; Described exhaust valve is positioned on the relatively large inclined-plane of described cylinder head upgrade; The diameter of described intake valve is greater than the diameter of described exhaust valve.
The utility model further improves: described piston-top surface exceeds the last plane of described cylinder block; Described piston-top surface is provided with dodges the hole.
The utility model further improves: corresponding with it inclined-plane forms crowded stream district and squeezes stream to form on the inclined-plane of described cylinder head bottom surface, described intake valve correspondence, the inclined-plane of described exhaust valve correspondence and the piston.
The utility model further improves: described spark-plug hole two edge back directions are cast with measuring plane respectively; Described measuring plane is parallel with described cylinder head bottom plane.
The utility model further improves: described measuring plane comprises that a big disc and two little discs are connected to form; The corresponding described spark-plug hole of described great circle face position; Described two roundlets are in the face of claiming to be distributed in described spark-plug hole both sides.
The utility model further improves: the outer periphery of the firing chamber of described small displacement engine are for circular.
The utility model further improves: described intake valve and exhaust valve are respectively two intake valves and two exhaust valves.
The beneficial effects of the utility model are: the utility model makes that the chamber structure of motor is more compact, can improve compression ratio, and surface to volume ratio is littler, has reduced thermal loss; The burning Interior design has the stream of squeezing district, can further improve the velocity of combustion of inflammable mixture burning, guarantees that inflammable mixture is fully burned, and when strengthening power character, improving Economy, has reduced the HC in the motor vehicle exhaust emission, CO and NO
XContent; Adopt two to advance two rows' valve arrangements, reasonable Arrangement valve head has improved the inlet and outlet effect of motor, and then has improved performance index such as engine power; The firing chamber method of measurement is simple, has greatly improved the quality inspection speed in the cylinder head large-scale production process.
Description of drawings
Fig. 1 is the schematic representation of the firing chamber of the utility model small displacement engine.
Fig. 2 is the plan view of the firing chamber of a kind of small displacement engine of the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
A kind of firing chamber of small displacement engine comprises cylinder block, intake valve, exhaust valve, cylinder head, spark plug and piston; Described cylinder head is provided with the inclined-plane and the arc surface of different gradient, and described inclined-plane and arc surface constitute ridge shape; The head of described piston is the bowl type; Described intake valve and exhaust valve lay respectively on the inclined-plane on the described cylinder head; Described spark plug is between described exhaust valve and intake valve and be positioned at described exhaust valve one side.
Described exhaust valve and described intake valve are respectively symplex structure.
Described intake valve is positioned on the less relatively inclined-plane of described cylinder head upgrade; Described exhaust valve is positioned on the relatively large inclined-plane of described cylinder head upgrade; The diameter of described intake valve is greater than the diameter of described exhaust valve.
Described piston-top surface exceeds the last plane of described cylinder block; Described piston-top surface is provided with dodges the hole.
Corresponding with it inclined-plane forms and squeezes the stream district to form crowded stream on the inclined-plane of described cylinder head bottom surface, described intake valve correspondence, the inclined-plane of described exhaust valve correspondence and the piston.
Described spark-plug hole two edge back directions are cast with measuring plane respectively; Described measuring plane is parallel with described cylinder head bottom plane.
Described measuring plane comprises that a big disc and two little discs are connected to form; The corresponding described spark-plug hole of described great circle face position; Described two roundlets are in the face of claiming to be distributed in described spark-plug hole both sides.
The outer periphery of the firing chamber of described small displacement engine are circular.
Described intake valve and exhaust valve are respectively two intake valves and two exhaust valves.
In the example, as Fig. 1, a kind of firing chamber of small displacement engine partly is made up of intake valve 3, exhaust valve 6, cylinder head 5, spark plug 4 and piston 1 etc.The outer periphery of firing chamber are circular; The firing chamber upper cavity is a ridge shape, is made of two inclined-planes of different gradient on the cylinder head 5 and the arc surface of both sides; The firing chamber lower chamber is a bowl-type, is made of the head of bowl top piston.Two intake valves 3 being arranged, be symplex structure, two exhaust valves are arranged, is symplex structure also, lays respectively on two inclined-planes of upper cavity.Spark plug 4 is between exhaust valve 6 and intake valve 3, near exhaust valve 6 one sides.
The firing chamber has adopted two to advance two rows' valve set-up mode, has increased the inlet and outlet area to greatest extent, has improved the inlet and outlet effect.Consider the significance of gas handling system, take intake valve to be slightly larger than the design proposal of exhaust valve.The surface slope of exhaust side is greater than the surface slope of air inlet side, but reasonable Arrangement valve like this makes the intake valve diameter greater than the exhaust valve diameter, has increased air inflow, and then has improved engine power.
For improving the compression ratio of motor, reduce surface to volume ratio, design piston 1 end face exceeds the last plane of cylinder block.Simultaneously, bump, process at piston 1 end face and dodge the hole accordingly for avoiding valve and piston 1 end face.
Optimize the intake duct design, can in cylinder, form stronger rolling during air inlet and flow the flow field; During compression, form by inclined-plane corresponding with it on the slope of cylinder head 5 bottom surface inlet and outlet sides and the piston and to squeeze stream district 2, can when piston stroking upward, form strong crowded stream effect, improved the velocity of combustion of inflammable mixture, guarantee the abundant burning of inflammable mixture, improved the thermal efficiency.And then, improved motor power character, improved Economy, reduced the HC in the motor vehicle exhaust emission, CO and NOX content.
In spark plug 4 holes of top of combustion chamber two edge back directions, be cast with two measuring planes respectively, this measuring plane is parallel with the cylinder cap bottom plane, be connected to form by a big disc 8 and two roundlet faces 7 respectively, big disc 8 corresponding spark-plug hole positions, two roundlet faces 7 are symmetrically distributed in the spark-plug hole both sides.
Firing chamber measuring plane casting forms, and is parallel with the cylinder cap bottom plane, exceeds the about 0.8mm～1.2mm in bottom surface, firing chamber; Big disc 8 corresponding spark-plug hole positions, major part is removed when boring spark-plug hole; And two facets 7 are mainly used to the cylinder cap of cylinder cap blank and finished product is carried out the measurement of combustion chamber volume.By the actual distance of measuring plane and cylinder cap bottom plane, and with design load contrast, infer whether the combustion chamber volume of cylinder cap meets the requirements, and then judge whether product qualified.This firing chamber method of measurement is simple, but the design specialized device measuring is applicable to production in enormous quantities.
In specific implementation process, as Fig. 1, a kind of small displacement engine partly is made up of intake valve 3, exhaust valve 6, cylinder head 5, spark plug 4 and piston 1 etc. with the firing chamber.Take intake valve to be slightly larger than the design proposal of exhaust valve, as 16.5 ° of the surface slopes of exhaust side, greater than the surface slope (15 °) of air inlet side, but reasonable Arrangement valve like this, make the intake valve diameter greater than the exhaust valve diameter, increased air inflow, and then improved engine power.Simultaneously, in the firing chamber, be provided with crowded stream interface,, will form stronger air motion in the cylinder, the accelerated combustion process in compression stroke latter stage.Increase the piston-top surface height, make the compression ratio of motor greater than 9.Fig. 2 and for example, spark-plug hole two edge back directions at top of combustion chamber, be cast with two measuring planes respectively, this measuring plane is parallel with the cylinder cap bottom plane, be connected to form by a big disc 8 and two roundlet faces 7 respectively, the corresponding spark-plug hole of great circle face position, two roundlets are in the face of claiming to be distributed in the spark-plug hole both sides.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (9)
1. the firing chamber of a small displacement engine comprises cylinder block, it is characterized in that: also comprise intake valve, exhaust valve, cylinder head, spark plug and piston; Described cylinder head is provided with the inclined-plane and the arc surface of different gradient, and described inclined-plane and arc surface constitute ridge shape; The head of described piston is the bowl type; Described intake valve and exhaust valve lay respectively on the inclined-plane on the described cylinder head; Described spark plug is between described exhaust valve and intake valve and be positioned at described exhaust valve one side.
2. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: described exhaust valve and described intake valve are respectively symplex structure.
3. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: described intake valve is positioned on the less relatively inclined-plane of described cylinder head upgrade; Described exhaust valve is positioned on the relatively large inclined-plane of described cylinder head upgrade; The diameter of described intake valve is greater than the diameter of described exhaust valve.
4. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: described piston-top surface exceeds the last plane of described cylinder block; Described piston-top surface is provided with dodges the hole.
5. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: corresponding with it inclined-plane forms and squeezes the stream district to form crowded stream on the inclined-plane of described cylinder head bottom surface, described intake valve correspondence, the inclined-plane of described exhaust valve correspondence and the piston.
6. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: described spark-plug hole two edge back directions are cast with measuring plane respectively; Described measuring plane is parallel with described cylinder head bottom plane.
7. according to the firing chamber of the described small displacement engine of claim 6, it is characterized in that: described measuring plane comprises that a big disc and two little discs are connected to form; The corresponding described spark-plug hole of described great circle face position; Described two roundlets are in the face of claiming to be distributed in described spark-plug hole both sides.
8. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: the outer periphery of the firing chamber of described small displacement engine are for circular.
9. according to the firing chamber of the described small displacement engine of claim 1, it is characterized in that: described intake valve and exhaust valve are respectively two intake valves and two exhaust valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201413701U CN201546800U (en) | 2009-09-25 | 2009-09-25 | Combustion chamber of small-displacement engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201413701U CN201546800U (en) | 2009-09-25 | 2009-09-25 | Combustion chamber of small-displacement engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201546800U true CN201546800U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201413701U Expired - Lifetime CN201546800U (en) | 2009-09-25 | 2009-09-25 | Combustion chamber of small-displacement engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201546800U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256114A (en) * | 2013-04-28 | 2013-08-21 | 重庆小康工业集团股份有限公司 | Obliquely-arranged valve cylinder head of gasoline engine |
| CN107355297A (en) * | 2017-07-31 | 2017-11-17 | 天津大学 | A kind of engine chamber for using Fuel Petroleum burning instead suitable for diesel engine |
| CN110799736A (en) * | 2017-09-26 | 2020-02-14 | 宝马股份公司 | Internal combustion engine |
| CN114076051A (en) * | 2020-08-19 | 2022-02-22 | 深圳臻宇新能源动力科技有限公司 | Cylinder head combustion chamber and vehicle |
-
2009
- 2009-09-25 CN CN2009201413701U patent/CN201546800U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256114A (en) * | 2013-04-28 | 2013-08-21 | 重庆小康工业集团股份有限公司 | Obliquely-arranged valve cylinder head of gasoline engine |
| CN107355297A (en) * | 2017-07-31 | 2017-11-17 | 天津大学 | A kind of engine chamber for using Fuel Petroleum burning instead suitable for diesel engine |
| CN107355297B (en) * | 2017-07-31 | 2022-12-09 | 天津大学 | Engine combustion chamber suitable for gasoline fuel combustion instead of diesel engine |
| CN110799736A (en) * | 2017-09-26 | 2020-02-14 | 宝马股份公司 | Internal combustion engine |
| US11125181B2 (en) | 2017-09-26 | 2021-09-21 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine |
| CN110799736B (en) * | 2017-09-26 | 2021-10-29 | 宝马股份公司 | Internal combustion engine |
| CN114076051A (en) * | 2020-08-19 | 2022-02-22 | 深圳臻宇新能源动力科技有限公司 | Cylinder head combustion chamber and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |