CN110425051B - Cylinder cover structure of natural gas automobile engine - Google Patents
Cylinder cover structure of natural gas automobile engine Download PDFInfo
- Publication number
- CN110425051B CN110425051B CN201910792216.9A CN201910792216A CN110425051B CN 110425051 B CN110425051 B CN 110425051B CN 201910792216 A CN201910792216 A CN 201910792216A CN 110425051 B CN110425051 B CN 110425051B
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- cover
- water pipe
- mounting hole
- air
- pipe
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000003345 natural gas Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 11
- 239000000446 fuel Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention relates to a cylinder cover structure of a natural gas automobile engine, which comprises a cylinder cover main body, wherein the cylinder cover main body comprises an inlet valve mounting hole, an outlet valve mounting hole, an air valve guide rail mounting hole, a cylinder cover plate and a water pipe frame, a plurality of equidistant outlet valve mounting holes are formed in the cylinder cover plate, one side of each outlet valve mounting hole is provided with an inlet valve mounting hole, an air valve guide rail mounting hole is arranged between each inlet valve mounting hole and each outlet valve mounting hole, a water pipe frame is arranged in the cylinder cover main body, an inlet valve is arranged in each inlet valve mounting Kong Zhongbu, each inlet valve comprises an air rod, an air nozzle, an oil duct and an oil pipe, the upper end of each inlet valve is provided with the air rod, and the lower end of each air rod is provided with the air nozzle. Oil is supplemented to the inner wall of the cylinder cover through the oil hole in the middle of the air inlet valve, meanwhile, the hardness and heat dissipation performance of the cylinder cover are improved, the strength is higher, the heat dissipation performance is better, the structure is reasonable, and the service life is long. The cylinder cover structure of the natural gas automobile engine has the advantages of high strength and strong heat dissipation.
Description
Technical Field
The invention relates to a natural gas automobile engine, in particular to a cylinder cover structure of the natural gas automobile engine.
Background
The advantages of natural gas include abundant resources, low emission pollution, low price and the like, and the natural gas is considered to be a fuel with development prospect, and most people use the natural gas as the third largest energy source in the world after coal and petroleum to play an increasingly important role. The main component of the fuel is methane, is a gaseous fuel, and can be fully mixed with air, so that the fuel basically has no particulate emission after combustion, and the CO generated after combustion is small; natural gas is also known as "clean fuel" because it produces minimal emissions of contaminants over the life cycle of exploitation, production, storage, transportation, use, etc. compared to other fossil fuels, and today where petroleum fuels are increasingly intense, natural gas is used as a new energy source in automotive engines for energy, but natural gas automotive engines have higher demands on their construction and performance than fuel automotive engines.
The cylinder cover of the natural gas automobile engine is arranged on the cylinder body of the natural gas automobile engine, and the cylinder is sealed from the upper part and forms a combustion chamber. The natural gas automobile engine is always contacted with high-temperature high-pressure gas, so that the natural gas automobile engine bears great thermal load and mechanical load, natural gas is filled into an engine cylinder through an air inlet valve, the natural gas is combusted after passing through a spark plug point, combusted waste gas is discharged through an air outlet valve, compared with a fuel automobile engine cylinder cover, the natural gas automobile engine cylinder cover is higher in strength requirement and higher in heat dissipation requirement, the fuel cylinder cover is lubricated through oil, the air inlet valve of the natural gas is severely worn in a back-and-forth motion mode on the cylinder cover, and deflagration is carried out in the cylinder body at the moment of igniting the natural gas, the process does not have oil buffering, and oil films on cylinder walls are damaged due to repeated impact of pressure waves on the inner walls of the cylinder cover, so that heat transfer of the inner walls of the cylinder cover is enhanced, heat loss is increased, power is reduced, and local high temperature of the cylinder cover is caused to be damaged.
Disclosure of Invention
In view of the above, it is necessary to provide a natural gas automobile engine head structure that can supplement oil to the inner wall of the head through the oil hole in the middle of the intake valve while increasing the strength and heat dissipation of the head.
The cylinder cover body comprises an air inlet valve mounting hole, an air outlet valve mounting hole, an air valve guide rail mounting hole, a cylinder cover plate and a water pipe frame, wherein a plurality of equidistant air outlet valve mounting holes are formed in the cylinder cover plate, one side of each air outlet valve mounting hole is provided with the air inlet valve mounting hole, the air valve guide rail mounting hole is arranged between the air inlet valve mounting hole and the air outlet valve mounting hole, and the water pipe frame is arranged in the cylinder cover body;
the water pipe frame comprises an upper cover, a middle cover, water pipes and a bottom cover, wherein the upper end of the water pipe frame is provided with the upper cover, one side of the upper cover is provided with a notch, the middle part of the upper cover is sleeved with the stepped middle cover, the two sides of the middle cover are provided with the water pipe upper cover plate, the lower end of the middle cover is provided with the bottom cover, the two sides of the bottom cover are provided with the water pipe lower cover plate, a water pipe groove is formed between the water pipe lower cover plate and the water pipe upper cover plate, a water pipe is arranged between the middle cover and the bottom cover, the water pipe comprises a water pipe plate and a pipeline, the middle part of the pipeline is provided with the water pipe plate, the water pipe plate is arranged between the middle cover and the bottom cover, and the pipeline is arranged between the water pipe lower cover plate and the water pipe upper cover plate;
the air inlet valve is characterized in that the air inlet valve is arranged in the middle of the air inlet valve mounting hole and comprises an air rod, an air tap, an oil duct and an oil pipe, the air rod is arranged at the upper end of the air inlet valve, the air tap is arranged at the lower end of the air rod, the oil pipe is sleeved outside the air rod and comprises an outer pipe, an inner pipe, a first annular opening and a second annular opening, the inner pipe is sleeved in the middle of the outer pipe, the air rod is sleeved in the middle of the inner pipe, the first annular opening is arranged at one end of the outer pipe, the second annular opening is arranged at one end of the inner pipe, and the oil duct is arranged at the lower end of the air tap.
Preferably, the gap between the outer tube and the inner tube is communicated with the oil duct.
Preferably, the lower bottom surface of the middle cover and the upper surface of the bottom cover are welded, and reinforcing ribs are arranged on the inner side walls of the bottom cover and the middle cover.
Preferably, the inner side walls of the inner pipe and the water pipe groove are provided with clamping teeth which are respectively fixedly connected with the air rod and the pipeline.
Preferably, a plurality of water pipe racks are arranged in the cylinder cover plate, and pipelines, a lower water pipe cover plate and an upper water pipe cover plate among the water pipe racks are all connected with each other.
Preferably, the upper cover, the middle cover and the bottom cover are all cylindrical, and the water tube panel is welded between the middle cover and the bottom cover, and the upper cover is sleeved on the upper end of the middle cover.
Preferably, spark plugs are mounted on two sides of the cylinder cover plate.
According to the cylinder cover structure of the natural gas automobile engine, the water pipe frame arranged in the middle of the cylinder cover main body can protect the pipeline, the strength of the cylinder cover main body can be increased, the pipeline is horizontally paved in the middle of the cylinder cover main body in a parallel and parallel mode, heat dissipation is guaranteed to be fast and uniform, the cylinder cover is opened when the air inlet valve moves downwards, natural gas is input into the cylinder from the air inlet valve mounting hole, the inclined plane of the air tap breaks away from the side wall of the mounting hole, oil in the oil pipe at the air inlet valve overflows from the oil duct, the overflowed oil flows along the inclined plane of the air tap, when the air inlet valve is closed, the inclined plane of the air tap is tightly attached to the side wall of the mounting hole, the oil port is closed, the overflowed oil stops overflowing, the overflowed oil flows on the inclined plane of the air tap and the side wall of the mounting hole in a uniformly distributed mode for lubrication, and redundant oil flows to the inner wall of the cylinder cover by taking the air inlet valve mounting hole as a center, the oil film layer which is lacked on the inner wall of the cylinder cover is replenished, heat transfer of the cylinder cover is reduced, heat loss is reduced, and the heat loss is avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic view of the internal structure of a cylinder head main body according to an embodiment of the present invention;
FIG. 3 is an exploded view of a water rack according to an embodiment of the present invention;
FIG. 4 is a schematic view of an assembled water pipe rack according to an embodiment of the present invention;
FIG. 5 is a schematic view of an intake valve structure according to an embodiment of the present invention;
fig. 6 is a schematic diagram of the working principle of the intake valve according to the embodiment of the invention.
In the figure: 1. a cylinder head main body; 11. an intake valve mounting hole; 12. an air outlet valve mounting hole; 13. valve guide mounting holes; 14. a cylinder cover plate; 15. a water pipe rack; 151. an upper cover; 1511. a notch; 152. a middle cover; 1521. a water pipe upper cover plate; 1522. reinforcing ribs; 153. a water pipe; 1531. a water tube panel; 1532. a pipe; 154. a bottom cover; 1541. a lower cover plate of the water pipe; 155. a water pipe groove; 2. an intake valve; 21. an air bar; 22. an air tap; 23. an oil passage; 24. an oil pipe; 241. an outer tube; 242. an inner tube; 2421. latch teeth; 243. a first collar; 244. a second ring opening; 3. a spark plug.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following describes the cylinder head structure of the natural gas automobile engine in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1-2, the cylinder head structure of the engine of the natural gas automobile in the embodiment of the invention comprises a cylinder head main body 1, wherein the cylinder head main body 1 comprises an intake valve mounting hole 11, an air outlet valve mounting hole 12, an air inlet valve guide rail mounting hole 13, a cylinder cover plate 14 and a water pipe frame 15, a plurality of equally spaced air outlet valve mounting holes 12 are arranged on the cylinder cover plate 14, a plurality of water pipe frames 15 are arranged in the cylinder cover plate 14, a pipeline 1532 between the water pipe frames 15, a water pipe lower cover plate 1541 and a water pipe upper cover plate 1521 are all connected with each other, namely, the pipeline 1532 in the cylinder head main body 1 is of an integral structure, the water pipe lower cover plate 1541 and the water pipe upper cover plate 1521 are two rectangular plate bodies, the air outlet valve mounting holes 12 are used for mounting air outlet valves, the same as the working principle of the intake valve 2, the air outlet valves move downwards along the air outlet valve mounting holes 12, and the diameter of the air rod 21 is smaller than that of the intake valve mounting hole 11, there is a gap through which the exhaust gas such as carbon dioxide after combustion is discharged, one side of the valve mounting hole 12 is provided with an intake valve mounting hole 11, a valve guide mounting hole 13 is installed between the intake valve mounting hole 11 and the valve mounting hole 12, the valve guide mounting hole 13 is used for mounting a guide rail, the guide rail is connected with the intake valve 2 and the valve, the intake valve 2 and the valve can be always in a state vertical to the top surface of the cylinder cover in the moving process of the intake valve mounting hole 11 and the valve mounting hole 12, the natural gas amount entering is controlled and the combustion exhaust gas is discharged rapidly, a water pipe rack 15 is installed in the cylinder cover main body 1, spark plugs 3 are installed on two sides of a cylinder cover plate 14, the spark plugs 3 are used for igniting the natural gas in the cylinder body, the cylinder cover main body 1 is fixedly installed at the end part of an engine cylinder, a piston rod is arranged in the engine cylinder, the piston rod stretches and contracts along the side wall of the cylinder body to do work.
Referring to fig. 3-4, the water tube rack 15 includes an upper cover 151, a middle cover 152, a water tube 153 and a bottom cover 154, the upper end of the water tube rack 15 is provided with the upper cover 151, one side of the upper cover 151 is provided with a notch 1511, the notch 1511 is used for clamping the water tube upper cover 1521 at two sides of the middle cover 152 and the water tube lower cover 1541 of the bottom cover 154, the middle part of the upper cover 151 is sleeved with the stepped middle cover 152, the lower bottom surface of the middle cover 152 and the upper surface of the bottom cover 154 are welded, the inner side walls of the bottom cover 154 and the middle cover 152 are provided with reinforcing ribs 1522, the water tube rack 15 not only can install the water tubes 153, fix the pipelines 1532 in the cylinder cover body 1, but also increase the stress intensity of two end surfaces of the cylinder cover body 1, one or two water tube racks 15 in the cylinder cover body 1 are connected with the lower end connecting pipelines 1532 of the water tube board 1531, the upper end of the water tube board 1531 is connected by a hose, the cooling water tank circulates to cool the cylinder cover, the water pipe upper cover 1521 is installed at both sides of the middle cover 152, the bottom cover 154 is installed at the lower end of the middle cover 152, the upper cover 151, the middle cover 152 and the bottom cover 154 are all cylindrical, the water pipe plate 1531 is welded between the middle cover 152 and the bottom cover 154, the upper cover 151 is sleeved at the upper end of the middle cover 152, the water pipe lower cover 1541 is arranged at both sides of the bottom cover 154, the water pipe groove 155 is arranged between the water pipe lower cover 1541 and the water pipe upper cover 1521, the water pipe groove 155 is used for installing the pipe 1532, the trend of the pipe 1532 is fixed and fixed between the middle cover 152 and the bottom cover 154, the water pipe 153 comprises the water pipe plate 1531 and the pipe 1532, the water pipe plate 1531 is arranged in the middle of the pipe 1532, the water pipe plate 1531 is installed between the middle cover 152 and the bottom cover 154, the pipe 1532 is installed between the water pipe lower cover 1541 and the water pipe upper cover 1521, the water pipe 15 not only can protect the pipe 1532, but also can increase the strength of the cylinder cover body 1, the pipes 1532 are laid in parallel in the middle of the cylinder head body 1 to ensure rapid and uniform heat dissipation.
Referring to fig. 5-6, the intake valve 2 is installed in the middle of the intake valve mounting hole 11, when the intake valve 2 moves downwards, gas is input into the cylinder from the intake valve mounting hole 11, the inclined surface of the air tap 22 is separated from the side wall of the mounting hole, the oil in the oil pipe 24 at the intake valve 2 overflows from the oil duct 23, the overflowed oil flows along the inclined surface of the air tap 22, when the intake valve 2 is closed, the inclined surface of the air tap 22 clings to the side wall of the mounting hole, the opening of the oil duct 23 is closed, the overflowed oil stops overflowing, and the overflowed oil is extruded and uniformly distributed on the inclined surface of the air tap 22 and the side wall of the mounting hole for lubrication, and the redundant oil flows to the inner wall of the cylinder cover with the intake valve mounting hole 11 as the center, supplements the missing layer on the inner wall of the cylinder cover due to impact, so that the heat transfer of the inner wall of the cylinder cover is reduced, the heat loss is reduced, and local high temperature of the cylinder cover is avoided, compared with the cylinder cover of the traditional fuel automobile engine, the cylinder cover has higher strength, better heat dispersion and reasonable structure, long service life, the intake valve 2 comprises the air rod 21, the air tap 22, the oil duct 23 and the oil pipe 24, the air rod 21 is arranged at the upper end of the intake valve 2, the air tap 22 is arranged at the lower end of the air rod 21, the oil pipe 24 is sleeved outside the air rod 21, the oil pipe 24 comprises an outer pipe 241, an inner pipe 242, a first annular opening 243 and a second annular opening 244, the middle part of the outer pipe 241 is sleeved with the inner pipe 242, a gap between the outer pipe 241 and the inner pipe 242 is communicated with the oil duct 23, an oil cavity between the outer pipe 241 and the inner pipe 242 is an oil storage cavity, when the intake valve 2 is opened, the oil duct 23 connected with the oil cavity slowly seeps out to the lower end for supplementing the oil film and lubrication, the clamping teeth 2421 are arranged on the inner side walls of the inner pipe 242 and the water pipe groove 155, the clamping teeth 2421 are respectively fixedly connected with the air rod 21 and the pipe 1532, the latch 2421 can ensure that the air rod 21 and the pipeline 1532 can not slide in the middle of the inner pipe 242 and the water pipe groove 155, the air rod 21 is sleeved in the middle of the inner pipe 242 for installation and fixation, the first annular opening 243 is installed at one end of the outer pipe 241, the second annular opening 244 is installed at one end of the inner pipe 242, and the oil duct 23 is opened at the lower end of the air tap 22.
Working principle: according to the natural gas automobile engine cylinder cover structure provided by the invention, the water pipe rack 15 arranged in the middle of the cylinder cover main body 1 can protect the pipeline 1532 and can also increase the strength of the cylinder cover main body 1, the pipeline 1532 is horizontally paved in the middle of the cylinder cover main body 1 in a parallel and parallel mode, so that rapid and uniform heat dissipation is ensured, when the intake valve 2 moves downwards, gas is input into the cylinder from the intake valve mounting hole 11, the inclined surface of the intake valve 22 is separated from the side wall of the mounting hole, oil in the oil pipe 24 at the intake valve 2 overflows from the oil duct 23, the overflowed oil flows along the inclined surface of the intake valve 22, when the intake valve 2 is closed, the inclined surface of the intake valve 22 is tightly attached to the side wall of the mounting hole, the oil duct 23 is closed, the overflowed oil stops, the overflowed oil is extruded and uniformly distributed on the inclined surface of the intake valve 22 and the side wall of the mounting hole for lubrication, and redundant oil flows on the inner wall of the cylinder cover with the mounting hole 11 as the center, and the missing oil film layer due to impact on the inner wall of the intake valve cover is supplemented.
To sum up: according to the natural gas automobile engine cylinder cover structure, the pipe 1532 can be protected through the water pipe rack 15 arranged in the middle of the cylinder cover main body 1, the strength of the cylinder cover main body 1 can be increased, the pipe 1532 is paved in the middle of the cylinder cover main body 1 in a parallel and parallel mode, heat dissipation is guaranteed to be fast and uniform, when the intake valve 2 moves downwards, gas is input into the cylinder from the intake valve mounting hole 11, the inclined surface of the air valve 22 is separated from the side wall of the mounting hole, oil liquid in the oil pipe 24 at the intake valve 2 overflows from the oil duct 23, the overflowed oil liquid flows along the inclined surface of the air valve 22, when the intake valve 2 is closed, the inclined surface of the air valve 22 is tightly attached to the side wall of the mounting hole, the oil duct 23 is closed, the overflow of the oil liquid is stopped, the overflowed oil liquid is extruded, the oil liquid is uniformly distributed on the inclined surface of the air valve 22 and the side wall of the mounting hole for lubrication, redundant oil liquid flows to the inner wall of the cylinder cover with the intake valve mounting hole 11 as the center, the oil film layer which is lack due to impact on the inner wall of the cylinder cover is complemented, heat transfer of the inner wall of the cylinder cover is reduced, local high temperature of the cylinder cover is avoided, compared with the traditional automobile engine cylinder cover, the engine has high strength, and better heat dissipation performance is achieved, and the heat dissipation structure is long in service life.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.
Claims (5)
1. The utility model provides a natural gas automobile engine cylinder cap structure, includes cylinder cap main part (1), its characterized in that: the cylinder cover body (1) comprises an air inlet valve mounting hole (11), an air outlet valve mounting hole (12), an air valve guide rail mounting hole (13), a cylinder cover plate (14) and a water pipe frame (15), wherein a plurality of equidistant air outlet valve mounting holes (12) are formed in the cylinder cover plate (14), one side of the air outlet valve mounting hole (12) is provided with the air inlet valve mounting hole (11), the air valve guide rail mounting hole (13) is arranged between the air inlet valve mounting hole (11) and the air outlet valve mounting hole (12), and the water pipe frame (15) is arranged in the cylinder cover body (1);
the water pipe frame (15) comprises an upper cover (151), a middle cover (152), a water pipe (153) and a bottom cover (154), wherein the upper end of the water pipe frame (15) is provided with the upper cover (151), one side of the upper cover (151) is provided with a notch (1511), the middle part of the upper cover (151) is sleeved with the stepped middle cover (152), water pipe upper cover plates (1521) are arranged on two sides of the middle cover (152), bottom covers (154) are arranged at the lower ends of the middle cover (152), water pipe lower cover plates (1541) are arranged on two sides of the bottom cover (154), a water pipe groove (155) is formed between the water pipe lower cover plates (1541) and the water pipe upper cover plates (1521), a water pipe (153) is arranged between the middle cover (152) and the bottom cover plates (154), the middle part of each water pipe (153) is provided with a water pipe plate (1531), the water pipe plate (1531) is arranged between the middle cover plates (152) and the bottom cover plates (154), and the water pipe upper cover plates (1531) are arranged between the water pipe lower cover plates (1531).
The air inlet valve is characterized in that an air inlet valve (2) is arranged in the middle of the air inlet valve mounting hole (11), the air inlet valve (2) comprises an air rod (21), an air tap (22), an oil duct (23) and an oil pipe (24), the air rod (21) is arranged at the upper end of the air inlet valve (2), the air tap (22) is arranged at the lower end of the air rod (21), the oil pipe (24) is sleeved outside the air rod (21), the oil pipe (24) comprises an outer pipe (241), an inner pipe (242), a first annular opening (243) and a second annular opening (244), the middle of the outer pipe (241) is sleeved with the inner pipe (242), the air rod (21) is sleeved in the middle of the inner pipe (242), the first annular opening (243) is arranged at one end of the outer pipe (241), the second annular opening (244) is arranged at one end of the inner pipe (242), and the lower end of the air tap (22) is provided with the oil duct (23).
The gap between the outer tube (241) and the inner tube (242) is communicated with the oil duct (23);
the lower bottom surface of the middle cover (152) and the upper surface of the bottom cover (154) are welded, and reinforcing ribs (1522) are arranged on the inner side walls of the bottom cover (154) and the middle cover (152).
2. A natural gas automotive engine head structure as defined in claim 1, wherein: the inner side walls of the inner pipe (242) and the water pipe groove (155) are provided with clamping teeth (2421), and the clamping teeth (2421) are respectively fixedly connected with the air rod (21) and the pipeline (1532).
3. A natural gas automotive engine head structure as defined in claim 1, wherein: the inside of cylinder cap board (14) is installed a plurality of water pipe racks (15), pipeline (1532), water pipe lower cover plate (1541) and water pipe upper cover plate (1521) all interconnect between a plurality of water pipe racks (15).
4. A natural gas automotive engine head structure as defined in claim 1, wherein: the upper cover (151), the middle cover (152) and the bottom cover (154) are all cylindrical, and the water pipe plate (1531) is welded between the middle cover (152) and the bottom cover (154), and the upper cover (151) is sleeved at the upper end of the middle cover (152).
5. A natural gas automotive engine head structure as defined in claim 1, wherein: spark plugs (3) are arranged on two sides of the cylinder cover plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910792216.9A CN110425051B (en) | 2019-08-26 | 2019-08-26 | Cylinder cover structure of natural gas automobile engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910792216.9A CN110425051B (en) | 2019-08-26 | 2019-08-26 | Cylinder cover structure of natural gas automobile engine |
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| Publication Number | Publication Date |
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| CN110425051A CN110425051A (en) | 2019-11-08 |
| CN110425051B true CN110425051B (en) | 2024-03-15 |
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| CN201910792216.9A Active CN110425051B (en) | 2019-08-26 | 2019-08-26 | Cylinder cover structure of natural gas automobile engine |
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| JP2015166595A (en) * | 2015-04-24 | 2015-09-24 | ヒンダークス，ミトジャ，ビクター | Novel reciprocating machinery, and other devices |
| CN109707526A (en) * | 2018-12-26 | 2019-05-03 | 郭严成 | A kind of automobile engine using new energy resources cylinder cap of positioning igniting |
| CN210919258U (en) * | 2019-08-26 | 2020-07-03 | 湖北玛尔帕斯动力科技有限公司 | Cylinder cover structure of natural gas automobile engine |
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| CN110425051A (en) | 2019-11-08 |
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