CN210509418U - Engine cylinder head, engine and vehicle - Google Patents
Engine cylinder head, engine and vehicle Download PDFInfo
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- CN210509418U CN210509418U CN201921437948.8U CN201921437948U CN210509418U CN 210509418 U CN210509418 U CN 210509418U CN 201921437948 U CN201921437948 U CN 201921437948U CN 210509418 U CN210509418 U CN 210509418U
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Abstract
The utility model provides an engine cylinder head and engine and vehicle, engine cylinder head have intake duct and exhaust passage, just the intake duct have with two inlet branch pipes that engine cylinder head's cylinder cap combustion chamber is connected, the exhaust passage have with two exhaust branch pipes that the cylinder cap combustion chamber is connected, the cylinder cap combustion chamber with in the crossing border of engine cylinder head bottom surface, the border has and is close to two inlet branch's first sideline, close to two exhaust branch's second sideline, and with both sides inlet branch reaches two third sidelines that exhaust branch pipe is close to respectively, just first sideline with the second sideline is configured as to engine cylinder head bottom surface center protrusion, the third sideline is straight form. The engine cylinder head can improve the thermal efficiency of the engine and reduce the emission of engine pollutants.
Description
Technical Field
The utility model relates to a vehicle parts technical field, in particular to engine cylinder head. The utility model discloses still relate to an engine that is provided with this engine cylinder head to and the vehicle of installing this engine.
Background
In order to improve the thermal efficiency of an engine and reduce the energy consumption and pollutant emission of the vehicle, vehicle factories adopt technologies such as pressurization, direct injection, high compression ratio, miller circulation, intercooled EGR and the like, and a reasonable combustion system is particularly important for improving the thermal efficiency of the engine.
The combustion system of the engine comprises an air inlet channel, an oil injector, a spark plug, a cylinder cover combustion chamber and a piston combustion chamber, wherein the cylinder cover combustion chamber is positioned at the front end of the combustion chamber of the engine, the air cylinder cover combustion chamber has important influence on the flow of air in the combustion chamber of the engine, the flow mode of the air directly influences the mixing effect of the air and fuel oil, the better the mixing effect of the air and the fuel oil is, the more the fuel oil is combusted, the higher the thermal efficiency of the engine is, the less the pollutant discharge amount is, for example, the cylinder cover combustion chamber can enable the gas to generate turbulent flow, the flame propagation speed is increased, and the thermal efficiency is improved, but the traditional cylinder cover combustion chamber is difficult to generate turbulent flow better.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to an engine cylinder head to improve the thermal efficiency of an engine.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model provides an engine cylinder head, in engine cylinder head is last to be constructed there is intake duct and exhaust passage, just the intake duct have with two intake branch pipes that engine cylinder head's cylinder head combustion chamber is connected, the exhaust passage have with two exhaust branch pipes that the cylinder head combustion chamber is connected, the cylinder head combustion chamber with in the crossing border of engine cylinder head bottom surface, the border has and is close to two intake branch's first sideline, close to two exhaust branch's second sideline, and with both sides intake branch reaches two third sidelines that exhaust branch pipe is close to respectively, just first sideline with the second sideline is configured as to engine cylinder head bottom surface center protrusion, the third sideline is straight form.
In a first plane passing through the center line of the engine cylinder and the axis of the spark plug, the first plane is vertical to a plane formed by intersecting the axis of the fuel injector and the axis of the spark plug, and an included angle α between the axis of the spark plug and the first plane is 10-15 degrees.
Furthermore, the length L of the electrode of the spark plug extending into the combustion chamber of the cylinder cover is between 1mm and 3 mm.
Furthermore, a spherical recess is formed on the inner wall of the cylinder head combustion chamber, and a fuel injector of the engine cylinder head is arranged in the spherical recess in a penetrating mode.
Further, a protruding portion is formed on an inner wall of the cylinder head combustion chamber between the ignition plug and the injector, and the protruding portion is configured to limit the flame spread at the ignition plug to the injector.
Furthermore, grooves are formed in the inner wall of the cylinder head combustion chamber between each intake branch pipe and the corresponding exhaust branch pipe.
Furthermore, the inner wall of the combustion chamber of the cylinder cover is formed by machining.
Furthermore, the inner wall of the cylinder head combustion chamber between the two intake branch pipes is step-shaped, and the step-shaped shape is stepped from the first edge to one side of an oil injector of the engine cylinder head.
Compared with the prior art, the utility model discloses following advantage has:
engine cylinder head through in the combustion chamber with in the crossing border of engine cylinder head bottom surface, will be close to in two intake branch's first sideline, and close to in two exhaust branch's second sideline establish to engine cylinder head bottom surface center protrusion, the top surface that can cooperate the engine piston forms squish district, the in-process that the piston went upward, each squish district can make and form the turbulent flow of higher intensity in the cylinder head combustion chamber, higher turbulent flow can make the regional thickness of burning increase, improves oil-gas mixture's combustion rate, improves the combustion efficiency of engine.
Another object of the present invention is to provide an engine, wherein the engine cylinder head is installed on the engine.
Furthermore, the utility model also provides a vehicle, in be equipped with on the vehicle as above the engine.
The utility model discloses an engine and vehicle have the same beneficial effect with foretell engine cylinder head, no longer describe herein.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a bottom view of an engine cylinder head according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
fig. 4 is an enlarged view at C in fig. 3.
Description of reference numerals:
1-cylinder cover combustion chamber, 11-first side line, 12-second side line, 13-third side line, 14-convex part, 15-spherical recess, 16-groove, 171-first step surface, 172-second step surface, 2-air inlet channel, 21-air inlet valve, 22-air inlet valve seat ring, 3-air outlet channel, 31-air outlet valve, 32-air outlet valve seat ring, 4-oil injector, 5-spark plug, 51-electrode and 6-engine cylinder body.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example one
The present embodiment relates to an engine cylinder head on which an intake duct 2 and an exhaust duct 3 are constructed, and the intake duct 2 has two intake branch ducts connected to a cylinder head combustion chamber 1 of the engine cylinder head, and the exhaust duct 3 has two exhaust branch ducts connected to the cylinder head combustion chamber 1, as shown in fig. 1, in a boundary where the cylinder head combustion chamber 1 intersects with a bottom surface of the engine cylinder head, the boundary has a first borderline 11 near the two intake branch ducts, a second borderline 12 near the two exhaust branch ducts, and two third borderlines 13 near the intake branch ducts and the exhaust branch ducts on both sides, respectively, wherein the first borderline 11 and the second borderline 12 are configured to protrude toward a center of the bottom surface of the engine cylinder head, and the third borderline 13 is flat.
One schematic illustration of the engine structure is that the engine includes an engine block 6 and an engine cylinder head, a block combustion chamber is configured on the engine block 6, a cylinder head combustion chamber 1 is configured on the engine cylinder head, and after the engine cylinder head is mounted on the engine block 6, the block combustion chamber and the cylinder head combustion chamber 1 can be fastened to enclose the engine combustion chamber.
One schematic illustration of the engine operation is as follows: an air inlet valve seat ring 22 positioned between two air inlet branch pipes and a cylinder cover combustion chamber 1 and an exhaust valve seat ring 32 positioned between two air inlet branch pipes and the cylinder cover combustion chamber 1 are fixedly arranged on an engine cylinder cover, an air inlet valve 21 and an exhaust valve 31 are arranged on the engine cylinder cover in a sliding manner, and the air inlet valve 21 can be matched with the air inlet valve seat ring 22 to form on and off of the air inlet branch pipes and the cylinder cover combustion chamber 1; the exhaust valve 31 can be matched with an exhaust valve seat ring 32 to form connection and disconnection of an exhaust branch pipe and the cylinder head combustion chamber 1; an oil injector 4 and a spark plug 5 are fixedly arranged on the cylinder cover of the engine; when the engine works, firstly, the exhaust passage 3 is closed, external air can enter a combustion chamber of the engine through the air inlet passage 2, meanwhile, the oil injector 4 injects oil liquid into the combustion chamber of the engine, the oil liquid and the air are mixed to form an oil-gas mixture, the oil-gas mixture can be ignited by the spark plug 5, so that a piston of the engine is pushed to do work outwards, then the air passage 2 is closed, the exhaust passage 3 is opened, waste gas generated by combustion of the oil-gas mixture can be discharged from the exhaust passage 3, and the piston is reset to enter next circulation.
It is known from the above working process of the engine that the oil needs to be mixed with the air entering the combustion chamber of the engine to form an oil-air mixture so as to be ignited, and obviously, the mixing effect of the oil and the air and the movement form of the oil-air mixture in the engine have an important influence on the combustion of the oil-air mixture, and the more the oil-air mixture is combusted, the higher the thermal efficiency of the engine is, and the lower the emission of pollutants of the engine is.
In the engine cylinder head of the embodiment, the boundary of the cylinder head combustion chamber 1 intersecting with the bottom surface of the engine cylinder head is set to be in the shape, wherein the boundary formed by the first side line 11, the second side line 12 and the third side line 13 surrounds the outer contour of the intake valve 21 and the exhaust valve 31 of the engine, as the first side line 11 and the second side line 12 are provided with the bulges facing to the center of the bottom surface of the engine cylinder head, the third side line 13 is tangent with the outer contour of the intake valve 21 and the exhaust valve 31, and the boundary formed by the first side line 11, the second side line 12 and the third side line 13 is matched with the top surface of the engine piston to form different squish areas, the squish oil-gas mixture forms stronger turbulence in the upward moving process of the piston of the engine, the turbulence motion has a vortex in a certain moving direction and a random gas pulsation, and the stronger turbulence can make the flat flame in a wrinkle form, even the flame surface is divided into a plurality of small blocks, the thickness of a combustion area can be increased, the combustion speed of the oil-gas mixture is increased, and the combustion of the oil-gas mixture can be more sufficient.
In addition, by arranging the structure on the cylinder cover combustion chamber 1, the distance between the electrode 51 of the spark plug 5 and the inner wall of the cylinder cover combustion chamber 1 can be reduced, so that the time for flame to diffuse from the electrode 51 to the boundary of the cylinder cover combustion chamber 1 can be shortened, the structure can also accelerate the combustion speed of the oil-gas mixture from the other side, the oil-gas mixture can be combusted more fully, the heat efficiency of the engine is further improved, and the pollutant emission of the engine is reduced.
In addition to the shape improvement of the cylinder head combustion chamber 1, the present embodiment also improves the installation structure of the spark plug 5, specifically, as shown in fig. 1 to 3, the injector 4 and the spark plug 5 are specifically located on the engine cylinder head between the two intake valves 21 and the exhaust valves 31, and the spark plug 5 is specifically located between the two exhaust valves 31 and the injector 4, in each first plane passing through the engine cylinder center line, that is, in the first plane passing through the axis of the cylindrical engine combustion chamber, the first plane perpendicular to the plane formed by intersecting the axis of the injector 4 and the axis of the spark plug 5, the included angle α between the first plane and the axis of the spark plug 5 is 10 ° to 15 °, for example, any one of 10 °, 11 °, 12 °, 13 °, 14 °, and 15 °, and the length L of the electrode 51 of the spark plug 5 extending into the cylinder head combustion chamber 1 is preferably 1 to 3mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, and 3mm, and by arranging the spark plug 5 according to the above structure, the spark plug 5 can be better matched with the shape of the cylinder head combustion chamber, and the circumferential direction of the spark plug 5, thereby ensuring the good combustion speed and the uniformity of the mixture of the cylinder head combustion chamber and the combustion chamber.
In the present embodiment, as shown in fig. 3 and 4, a protruding portion 14 is configured on the inner wall of the cylinder head combustion chamber 1 between the injector 4 and the spark plug 5, the protruding portion 14 is specifically a partition plate protruding from the inner wall of the cylinder head combustion chamber 1 and located between the injector 4 and the spark plug 5, and the protruding portion 14 is configured to limit the flame at the spark plug 5 from spreading to the injector 4, so that the head of the injector 4 can be protected, the direct impact of the flame on the head of the injector 4 can be avoided, and the service life of the injector 4 can be prevented from being affected by the direct impact of the flame.
Meanwhile, in order to better protect the head of the fuel injector 4, in this embodiment, a spherical recess 15 is further configured on the inner wall surface of the cylinder head combustion chamber 1, the fuel injector 4 is inserted into the spherical recess 15, specifically, the head of the fuel injector 4 extending into the cylinder head combustion chamber 1 is inserted into the spherical recess 15, and by combining the spherical recess 15 and the protruding portion 14, flame impact on the fuel injector 4 can be effectively reduced, and the service life of the fuel injector 4 can be prolonged.
In the present embodiment, as shown in fig. 1, a groove 16 is further formed on the inner wall of the combustion chamber between each intake branch pipe and the corresponding exhaust branch pipe, specifically, the groove 16 preferably extends from the boundary between two sides of the spark plug 5 to the two third edges 13, and by providing the groove 16, the flame front can be guided, the diffusion speed of the flame at the spark plug 5 to the two third edges 13 can be increased, and the combustion speed of the oil-gas mixture can be increased, so that the oil-gas mixture can be combusted more fully.
In the present embodiment, as shown in fig. 1, 3 and 4, the inner wall of the cylinder head combustion chamber 1 between the two intake branch pipes is stepped, and the step is stepped from the first sideline 11 to the side of the injector 4. Specifically, the inner wall of the cylinder head combustion chamber 1 between the two intake branch pipes is stepped in two steps, and for convenience of description, the lower step is referred to as a first step surface 171, and the other step surface is referred to as a second step surface 172, where the first step surface 171 is connected to the bottom surface of the engine cylinder head and the second step surface 172 is connected to the spherical recess 15 at the fuel injector 4.
The inner wall of the cylinder cover combustion chamber 1 between the two air inlet branch pipes is arranged to be step-shaped, on one hand, the inner wall can be matched with an inner hole of the air inlet valve seat ring 22 to form a shielding structure, the shielding structure can guide air flow entering the cylinder cover combustion chamber 1, the tumble strength in the engine combustion chamber can be enhanced, the uniformity of mixing of air and oil is improved, and therefore the full combustion of an oil-gas mixture is facilitated; on the other hand, the step-shaped structure can make the center of the flow field in the cylinder in the early stage of ignition deflect to the electrode 51 of the spark plug 5, and can also increase the combustion speed of the oil-gas mixture, so that the oil-gas mixture is more fully combusted.
In order to improve the machining precision of the inner wall of the combustion chamber, in the embodiment, the inner wall of the combustion chamber is preferably formed by machining, such as milling.
In summary, in the engine cylinder head of the embodiment, by adjusting the shape of the intersecting boundary between the cylinder head combustion chamber 1 and the bottom surface of the engine cylinder head, the flame propagation distance from the spark plug 5 to the boundary of the cylinder head combustion chamber 1 can be shortened, the combustion speed of the oil-gas mixture can be improved, the turbulence intensity in the engine combustion chamber can be improved, the combustion speed of the oil-gas mixture can be further improved, the combustion of the oil-gas mixture can be more sufficient, the combustion efficiency of the engine can be improved, and the pollutant emission of the engine can be reduced.
Example two
The present embodiment relates to an engine on which an engine cylinder head as described in the first embodiment is mounted.
The engine of the embodiment can have higher thermal efficiency by installing the engine cylinder cover according to the first embodiment, and can reduce the pollutant discharge amount of the engine.
EXAMPLE III
The present embodiment relates to a vehicle equipped with an engine as described in the second embodiment.
The vehicle of the embodiment is beneficial to energy conservation and emission reduction of the vehicle by installing the engine of the second embodiment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An engine cylinder head on which an intake duct (2) and an exhaust duct (3) are constructed, and the intake duct (2) has two intake branch ducts connected with a head combustion chamber (1) of the engine cylinder head, the exhaust duct (3) has two exhaust branch ducts connected with the head combustion chamber (1), characterized in that: in the boundary where the cylinder head combustion chamber (1) and the bottom surface of the engine cylinder head intersect, the boundary has a first sideline (11) close to two intake branch pipes, a second sideline (12) close to two exhaust branch pipes, and two third sidelines (13) close to the intake branch pipes and the exhaust branch pipes on both sides respectively, and the first sideline (11) and the second sideline (12) are configured to protrude toward the center of the bottom surface of the engine cylinder head, and the third sideline (13) is straight.
2. An engine cylinder head according to claim 1, characterized in that the engine cylinder head is provided with an ignition plug (5) and an injector (4), the axis of the ignition plug (5) and a first plane passing through the engine cylinder center line are perpendicular to a plane formed by the intersection of the axis of the injector (4) and the axis of the ignition plug (5), and the included angle α between the axis of the ignition plug (5) and the first plane is 10-15 °.
3. The engine cylinder head according to claim 2, characterized in that: the length L of the electrode (51) of the spark plug (5) extending into the cylinder cover combustion chamber (1) is between 1mm and 3 mm.
4. The engine cylinder head according to claim 1, characterized in that: a spherical recess (15) is formed on the inner wall of the cylinder head combustion chamber (1), and a fuel injector (4) of the engine cylinder head penetrates through the spherical recess (15).
5. The engine cylinder head according to claim 4, characterized in that: a convex part (14) is constructed on the inner wall of the cylinder head combustion chamber (1) between the spark plug (5) and the fuel injector (4) of the engine cylinder head, and the convex part (14) is configured to limit the flame spread at the spark plug (5) to the fuel injector (4).
6. The engine cylinder head according to claim 1, characterized in that: grooves (16) are formed in the inner wall of the cylinder head combustion chamber (1) between each intake branch pipe and the exhaust branch pipe corresponding to the intake branch pipe.
7. The engine cylinder head according to claim 1, characterized in that: the inner wall of the cylinder cover combustion chamber (1) is formed by machining.
8. The engine cylinder head according to any one of claims 1 to 7, characterized in that: the inner wall of the cylinder head combustion chamber (1) between the two air inlet branch pipes is in a step shape, and the step shape is stepped from the first sideline (11) to one side of an oil injector (4) of the engine cylinder head.
9. An engine, characterized in that: an engine cylinder head according to any one of claims 1 to 8 is provided on the engine.
10. A vehicle, characterized in that: an engine as claimed in claim 9 provided on the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921437948.8U CN210509418U (en) | 2019-08-30 | 2019-08-30 | Engine cylinder head, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921437948.8U CN210509418U (en) | 2019-08-30 | 2019-08-30 | Engine cylinder head, engine and vehicle |
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| Publication Number | Publication Date |
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| CN210509418U true CN210509418U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921437948.8U Active CN210509418U (en) | 2019-08-30 | 2019-08-30 | Engine cylinder head, engine and vehicle |
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| CN (1) | CN210509418U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969846A (en) * | 2021-11-01 | 2022-01-25 | 安徽航瑞航空动力装备有限公司 | Engine cylinder head and method of assembling the same |
| 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 |
-
2019
- 2019-08-30 CN CN201921437948.8U patent/CN210509418U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113969846A (en) * | 2021-11-01 | 2022-01-25 | 安徽航瑞航空动力装备有限公司 | Engine cylinder head and method of assembling the same |
| CN113969846B (en) * | 2021-11-01 | 2022-10-25 | 安徽航瑞航空动力装备有限公司 | Engine cylinder head and method of assembling the same |
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