CN215057745U - Single-cylinder two-stroke direct injection engine - Google Patents
Single-cylinder two-stroke direct injection engine Download PDFInfo
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- CN215057745U CN215057745U CN202121073779.1U CN202121073779U CN215057745U CN 215057745 U CN215057745 U CN 215057745U CN 202121073779 U CN202121073779 U CN 202121073779U CN 215057745 U CN215057745 U CN 215057745U
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Abstract
A single-cylinder two-stroke direct injection engine relates to the technical field of two-stroke engines, in particular to a single-cylinder two-stroke direct injection engine applicable to an unmanned aerial vehicle. The thickness of the cylinder cover corresponds to the height of the installation thread of the spark plug, the spark plug and the electric control oil nozzle are arranged on the cylinder cover, and the electric control oil nozzle is connected with the fuel tank through the oil pump; the lower part of the cylinder body is connected with a crankcase; the crankcase is connected with the combustion chamber through a scavenging passage; the crankcase is connected with the air inlet channel through a one-way valve, a lubricating oil port is arranged on the air inlet channel, and the lubricating oil port is connected with a lubricating oil tank; and an electronic turbocharger is arranged at the outer end of the air inlet channel. The fuel oil directly enters the air, and the pollution to the environment is reduced; the cylinder cover is formed by machining the aluminum alloy, and compared with a cylinder cover formed by casting, the cylinder cover is thinner and lighter in thickness, better in strength, safer and more reliable; the arrangement mode of the spark plug and the electric control oil nozzle is reasonable, the combustion efficiency of fuel oil is improved, the waste of the fuel oil is avoided, and the oil consumption is reduced by 50%.
Description
The technical field is as follows:
the utility model relates to a two-stroke engine technical field especially relates to a direct injection engine in single-cylinder two-stroke cylinder suitable for unmanned aerial vehicle.
Background art:
the two-stroke engine has simple structure and lower cost. The cylinder block of a two-stroke engine has three ports, namely an inlet port, an outlet port and a transfer port, which are each closed at a certain moment by a piston. Its duty cycle comprises two strokes: a first stroke: the piston moves upwards from the lower dead point, and after the three air holes are closed simultaneously, the mixed gas entering the cylinder is compressed; when the air inlet is exposed, the combustible mixed gas flows into the crankcase; a second stroke: when the piston is compressed to the position near the upper dead point, the spark plug ignites combustible mixed gas, and the combustible gas expands to push the piston to move downwards to do work. At this time, the air inlet is closed, and the combustible mixed gas sealed in the crankcase is compressed; when the piston approaches the lower dead point, the exhaust hole is opened, and the waste gas rushes out; then the ventilation hole is opened, the pre-pressed combustible mixed gas is flushed into the cylinder, the waste gas is removed, and the ventilation process is carried out; because the exhaust and the air intake are carried out simultaneously, the waste gas can not be completely discharged, and part of combustible mixed gas can be discharged together, so that the fuel efficiency is low and the environment is polluted.
The invention content is as follows:
an object of the utility model is to provide a direct injection engine in single-cylinder two-stroke jar to reach and improve fuel combustion efficiency, save the oil, improve the purpose of engine power.
The utility model provides a single-cylinder two-stroke direct injection engine in a cylinder, which comprises a hollow cylinder body, wherein a piston is arranged in the cylinder body; the side wall of the cylinder body is provided with an exhaust passage and a scavenging passage, the positions of the exhaust passage and the scavenging passage correspond to the positions of the piston, and the exhaust passage is connected with the exhaust smoke pipe; the upper part of the cylinder body is provided with a cylinder cover, and the cylinder cover and the cylinder body form a combustion chamber; the lower part of the cylinder body is connected with a crank case, a crank shaft is arranged in the crank case, and the crank shaft is connected with a piston through a connecting rod; the crankcase is connected with the combustion chamber through a scavenging passage; the crankcase is connected with the air inlet channel through a one-way valve, a lubricating oil port is arranged on the air inlet channel, and the lubricating oil port is connected with a lubricating oil tank; and an electronic turbocharger is arranged at the outer end of the air inlet channel.
Further, the cylinder body is cast by aluminum alloy, and the cylinder cover is processed by aluminum alloy; the cylinder body and the cylinder cover are externally provided with radiating fins.
Furthermore, the piston head is a spherical convex surface.
Furthermore, the central axis of the cylinder cover is provided with an electric control oil nozzle, and the two spark plugs are symmetrically arranged on two sides of the electric control oil nozzle and incline towards the axis direction.
Furthermore, the cylinder cover is provided with an electric control oil injection nozzle and two spark plugs, and the electric control oil injection nozzle and the two spark plugs are arranged around the central axis to form an equilateral triangle and incline towards the direction of the central axis.
Furthermore, the cylinder cover is provided with an electric control oil injection nozzle and a spark plug, and the arrangement positions of the electric control oil injection nozzle and the spark plug are centrosymmetric about the central axis of the cylinder cover and incline towards the axis direction.
Furthermore, the cylinder cover is provided with an electric control oil injection nozzle and a spark plug, the electric control oil injection nozzle is arranged at the central axis position of the cylinder cover, and the spark plug is arranged on one side of the electric control oil injection nozzle and inclines towards the axis direction.
Furthermore, the cylinder cover is provided with an electric control oil nozzle and a spark plug, the spark plug is arranged at the central axis of the cylinder cover, and the electric control oil nozzle is arranged on one side of the spark plug and inclines towards the axis direction.
Furthermore, the fuel of the single-cylinder two-stroke direct injection engine is heavy oil, gasoline, diesel oil and the like.
The single-cylinder two-stroke direct injection engine in the cylinder uses the direct injection system in the cylinder, thereby reducing the direct entering of fuel into the air and reducing the pollution to the environment; the cylinder cover is formed by machining the aluminum alloy, and compared with a cast cylinder cover, the cylinder cover has the advantages that the thickness is thinner, the occurrence of casting bubbles, slag inclusion and other defects is avoided, the strength is better, and the cylinder cover is safer and more reliable; the arrangement mode of the spark plug and the electric control oil nozzle is reasonable, the combustion efficiency of fuel oil is improved, the waste of the fuel oil is avoided, and the oil consumption is reduced by 50%.
Description of the drawings:
the invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a cross-sectional view of the present invention at the crankshaft axis and piston axis;
fig. 3 is a schematic structural view of the cylinder head provided with a spark plug and an electrically controlled fuel injection nozzle according to the present invention;
FIG. 4 is a schematic structural view of a cylinder head of the present invention with two spark plugs and an electrically controlled fuel injection nozzle arranged in a line;
FIG. 5 is a schematic diagram of the structure of the cylinder head of the present invention with two spark plugs and an electrically controlled fuel injection nozzle arranged in a triangular shape;
FIG. 6 is a schematic structural view of the electrically controlled fuel injection nozzle of the present invention disposed at the central axis of the cylinder head, and the spark plug disposed at one side;
fig. 7 is the structure diagram of the spark plug of the present invention disposed at the central axis of the cylinder head and the electric control oil nozzle disposed at one side.
The specific implementation mode is as follows:
as shown in fig. 1-2, the single-cylinder two-stroke direct injection engine in the cylinder has light weight and large efficiency ratio required by the unmanned aerial vehicle engine, so that a hollow cylinder body 1 is cast by using aluminum alloy, a radiating fin 14 integrally cast is arranged outside the cylinder body, a spherical convex piston 2 is arranged in the cylinder body, an exhaust passage 3 and a scavenging passage 4 are arranged on the side wall of the cylinder body, and the positions of the exhaust passage and the scavenging passage correspond to the positions of the piston; the upper part of the cylinder body is connected with a cylinder cover 6 through a bolt, the cylinder cover is processed by aluminum alloy and is provided with a concave surface corresponding to the hollow position of the cylinder body, and a radiating fin 14 is formed by processing the outer part of the cylinder cover; the thickness of the cylinder cover corresponds to the height of the installation thread of the spark plug, the spark plug 15 and the electric control oil nozzle 16 are arranged on the cylinder cover, and the electric control oil nozzle is connected with the fuel tank through an oil pump; the lower part of the cylinder body is connected with a crank case 8 through a bolt, a crank shaft 9 is arranged in the crank case, and the crank case is connected with a combustion chamber 7 through a scavenging passage; the crankshaft is connected with the piston through a connecting rod 10, and the end part of the crankshaft is connected with a rotating shaft;
the crankcase is provided with an air inlet, a check valve 11 is arranged at the position of the air inlet, the outer end of the check valve is connected with an air inlet passage 17, the upper side wall of the air inlet passage is provided with a lubricating oil port 12, and the lubricating oil port is connected with a lubricating oil tank; the outer end of the air inlet channel is provided with an electronic turbocharger 13; the outlet of the exhaust passage is connected with an exhaust smoke pipe 5, and the exhaust smoke pipe is arranged on the outer side of the cylinder body.
Example 1: as shown in fig. 3, a mounting hole of the electronic control oil nozzle is processed at the central axis position of the cylinder head, and a spark plug mounting 15 threaded hole is respectively processed at symmetrical positions at two sides of the mounting hole of the electronic control oil nozzle 16, and the direction of the threaded hole is inclined towards the axial direction; and respectively installing the electric control oil nozzle and the spark plug on the corresponding installation hole and the installation threaded hole.
Example 2: as shown in fig. 4, a cylinder head is provided with a central axis as a center, and a mounting hole of an electrically controlled fuel injector and mounting threaded holes of two spark plugs are machined around the cylinder head, wherein the positions of the mounting holes form an equilateral triangle, and the direction of the equilateral triangle inclines towards the direction of the central axis; and respectively installing the electric control oil nozzle and the spark plug on the corresponding installation hole and the installation threaded hole.
Example 3: as shown in fig. 5, the cylinder head is provided with a central axis as a center, and an electrically controlled fuel injector mounting hole and a spark plug mounting threaded hole are respectively machined at symmetrical positions of the cylinder head, and the directions of the electrically controlled fuel injector mounting hole and the spark plug mounting threaded hole are inclined towards the direction of the central axis; and respectively installing the electric control oil nozzle and the spark plug on the corresponding installation hole and the installation threaded hole.
Example 4: as shown in fig. 6, an electrically controlled fuel injection nozzle mounting hole is formed in the central axis of the cylinder head, and a spark plug mounting threaded hole is formed in one side of the electrically controlled fuel injection nozzle mounting hole and is inclined toward the central axis.
Example 5: as shown in fig. 7, a mounting threaded hole of the spark plug is formed in the central axis of the cylinder head, and an electrically controlled fuel injector mounting hole is formed on one side of the mounting threaded hole of the spark plug, and the direction of the electrically controlled fuel injector mounting hole is inclined towards the central axis direction.
In the actual working process, air is blown into the air inlet channel through the electronic turbocharger, the piston moves towards the direction of a cylinder cover, lubricating oil enters the air inlet channel through a lubricating oil port arranged on the air inlet channel and is mixed with the air, and the lubricating oil enters a crankcase along with the air to lubricate parts such as a crankshaft, a connecting rod, the piston and the like; the piston compresses air, the electric control oil nozzle sprays fuel oil, the spark plug correspondingly acts, and the fuel oil is ignited to do work on the piston; the piston moves towards the direction far away from the cylinder cover, and air in the crankcase enters a combustion chamber formed by the cylinder body and the cylinder cover through the scavenging passage along with the action of the piston to drive waste gas out of the combustion chamber; the piston moves towards the cylinder cover again, and then circulates, so that the single-cylinder two-stroke direct injection engine runs all the time.
Claims (9)
1. A single-cylinder two-stroke direct injection engine comprises a hollow cylinder body (1), wherein a piston (2) is arranged in the cylinder body; the side wall of the cylinder body is provided with an exhaust passage (3) and a scavenging passage (4), the positions of the exhaust passage and the scavenging passage correspond to the positions of the piston, and the exhaust passage is connected with an exhaust smoke pipe (5); the upper part of the cylinder body is provided with a cylinder cover (6), and the cylinder cover and the cylinder body form a combustion chamber (7), which is characterized in that the thickness of the cylinder cover corresponds to the height of the installation thread of the spark plug, the cylinder cover is provided with the spark plug (15) and an electric control oil nozzle (16), and the electric control oil nozzle is connected with a fuel tank through an oil pump; the lower part of the cylinder body is connected with a crank case (8), a crank shaft (9) is arranged in the crank case, and the crank shaft is connected with a piston through a connecting rod (10); the crankcase is connected with the combustion chamber through a scavenging passage; the crankcase is connected with an air inlet (17) through a one-way valve (11), a lubricating oil port (12) is arranged on the side wall of the air inlet channel, and the lubricating oil port is connected with a lubricating oil tank; an electronic turbocharger (13) is arranged at the outer end of the air inlet channel.
2. The single cylinder two-stroke direct injection in-cylinder engine of claim 1 wherein said cylinder block is cast from an aluminum alloy and said cylinder head is machined from an aluminum alloy; and radiating fins (14) are arranged outside the cylinder body and the cylinder cover.
3. The single cylinder two-stroke direct injection engine of claim 1 wherein said piston head is spherically convex.
4. The single cylinder two-stroke direct injection in-cylinder engine according to claim 1 wherein the central axis of the cylinder head is provided with an electronically controlled injector, and the two spark plugs are symmetrically disposed on opposite sides of the electronically controlled injector and inclined in the axial direction.
5. The single cylinder two-stroke direct injection in-cylinder engine of claim 1 wherein said cylinder head is provided with an electronically controlled injector and two spark plugs, one of said electronically controlled injector and said two spark plugs being disposed about said central axis to form an equilateral triangle and being inclined toward said central axis.
6. The single cylinder two-stroke direct injection in-cylinder engine according to claim 1, wherein the cylinder head is provided with an electronically controlled fuel injector and a spark plug, and the electronically controlled fuel injector and the spark plug are arranged at positions that are centrosymmetric with respect to a center axis of the cylinder head and inclined toward the axial center.
7. The single cylinder two-stroke direct injection in-cylinder engine according to claim 1, wherein said cylinder head is provided with an electronically controlled injector and a spark plug, the electronically controlled injector being disposed at a central axis of the cylinder head, and the spark plug being disposed on a side of the electronically controlled injector and inclined toward the axial center.
8. The single cylinder two-stroke direct injection in cylinder engine of claim 1 wherein said cylinder head is provided with an electronically controlled injector and a spark plug, said spark plug being disposed at a central axis of said cylinder head, said electronically controlled injector being disposed on a side of said spark plug and being inclined toward said axial center.
9. The single-cylinder two-stroke direct injection engine according to any one of claims 4 to 8, wherein the fuel of the single-cylinder two-stroke direct injection engine is heavy oil, gasoline, or diesel oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073779.1U CN215057745U (en) | 2021-05-19 | 2021-05-19 | Single-cylinder two-stroke direct injection engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073779.1U CN215057745U (en) | 2021-05-19 | 2021-05-19 | Single-cylinder two-stroke direct injection engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215057745U true CN215057745U (en) | 2021-12-07 |
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ID=79212292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121073779.1U Active CN215057745U (en) | 2021-05-19 | 2021-05-19 | Single-cylinder two-stroke direct injection engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215057745U (en) |
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2021
- 2021-05-19 CN CN202121073779.1U patent/CN215057745U/en active Active
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