CN215057744U - Horizontally-opposed multi-cylinder two-stroke in-cylinder direct injection engine - Google Patents
Horizontally-opposed multi-cylinder two-stroke in-cylinder direct injection engine Download PDFInfo
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- CN215057744U CN215057744U CN202121073457.7U CN202121073457U CN215057744U CN 215057744 U CN215057744 U CN 215057744U CN 202121073457 U CN202121073457 U CN 202121073457U CN 215057744 U CN215057744 U CN 215057744U
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Abstract
The utility model provides a direct injection engine in horizontal opposition multicylinder two-stroke cylinder, relates to two-stroke engine technical field, concretely relates to direct injection engine in horizontal opposition multicylinder two-stroke cylinder suitable for unmanned aerial vehicle. The thickness of the cylinder cover corresponds to the height of the installation thread of the spark plug, and the pistons in each pair of cylinders are respectively connected to the crankshaft through two connecting rods; 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 cylinder cover is formed by machining the aluminum alloy, and compared with a cylinder cover formed by casting, the cylinder cover is thinner, safer and more reliable; the arrangement mode of the spark plug and the electric control fuel injection nozzle is reasonable, and the combustion efficiency of fuel oil is improved; and a plurality of pairs of cylinders are horizontally arranged oppositely, and the moving directions of the pistons are opposite, so that the overall stability of the engine is improved, and the power loss is reduced.
Description
The technical field is as follows:
the utility model relates to a two-stroke engine technical field, concretely relates to direct injection engine in horizontal opposition multicylinder 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 two-stroke single-cylinder engine has poor balance and stability.
The invention content is as follows:
an object of the utility model is to provide a direct injection engine in horizontal opposition multicylinder two-stroke cylinder to reach and improve fuel combustion efficiency, save the oil, reduce the power loss, improve the purpose of engine power.
The utility model provides a horizontal opposed multi-cylinder two-stroke direct injection engine, which is characterized in that the engine comprises at least one pair of horizontally opposed cylinder bodies, and pistons are arranged in the cylinder bodies; 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, the cylinder cover and the cylinder body form a combustion chamber, the thickness of the cylinder cover corresponds to the height of an installation thread of a spark plug, the cylinder cover is provided with the spark plug and an electric control oil nozzle, and the electric control oil nozzle is connected with a fuel tank through an oil pump; the lower parts of the cylinder bodies are connected through a crank case, a crank shaft is arranged in the crank case, and pistons in a plurality of pairs of cylinders are respectively connected to the crank shaft through two connecting rods; 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 number of the cylinder bodies is one pair.
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 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 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 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 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.
Further, the fuel of the horizontally opposed multi-cylinder two-stroke direct injection engine is heavy oil, gasoline, diesel oil and the like.
The horizontally opposed multi-cylinder two-stroke direct injection engine provided by the utility model 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%; and a plurality of pairs of cylinders are horizontally arranged oppositely, and the moving directions of the pistons are opposite, so that the overall stability of the engine is improved, and the power loss is reduced.
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 axis of two pistons;
FIG. 3 is a cross-sectional view of the present invention taken along the axis of the crankshaft and the axis of the intake duct;
fig. 4 is a schematic structural diagram of a cylinder head with a spark plug and an electrically controlled fuel injection nozzle symmetrically arranged according to the present invention;
FIG. 5 is a schematic structural view of the spark plug of the present invention disposed at the central axis of the cylinder head, and the electrically controlled fuel injection nozzle disposed at one side; 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 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. 8 is a schematic structural diagram of the cylinder head triangle arrangement of two spark plugs and an electrically controlled fuel injection nozzle of the present invention.
The specific implementation mode is as follows:
as shown in fig. 1-2, the unmanned engine requires light weight and large efficiency, so that two hollow cylinders 1 are cast by using aluminum alloy, radiating fins 14 integrally cast are arranged outside the cylinders, spherical convex pistons 2 are arranged in the cylinders, exhaust passages 3 and scavenging passages 4 are arranged on the side walls of the cylinders, and the positions of the exhaust passages and the scavenging passages correspond to the positions of the pistons; the upper parts of the two cylinder bodies are connected with a cylinder cover 6 through bolts, the cylinder cover is formed by processing 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 parts of the two cylinder bodies are connected with a crank case 8 through bolts, the two cylinder bodies are horizontally opposite, 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 pistons in the two cylinders are respectively connected with a crankshaft 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. 4, 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 on two sides 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 2: as shown in fig. 5, 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.
Example 3: 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 4: as shown in fig. 7, a mounting hole of the electronic control oil nozzle is machined at the central axis of the cylinder head, and a mounting threaded hole of the spark plug 15 is respectively machined at symmetrical positions on two sides of the mounting hole of the electronic control oil nozzle 16, wherein the direction of the mounting 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 5: as shown in fig. 8, 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.
In the actual working process, air is blown into the air inlet channel through the electronic turbocharger, pistons of the two cylinders move towards the direction of a cylinder cover at the same time, and lubricating oil enters the air inlet channel through a lubricating oil port arranged on the air inlet channel, is mixed with the air and enters a crankcase along with the air to lubricate parts such as a crankshaft, a connecting rod, the pistons and the like; the piston compresses air, the electric control oil nozzle on the cylinder cover sprays fuel oil, the spark plug correspondingly acts, and the fuel oil is ignited to do work on the piston; the pistons of the two cylinders move towards the direction of the crankshaft at the same time, air in the crankcase is extruded along with the action of the pistons, enters a combustion chamber formed by the cylinder body and the cylinder cover through a scavenging passage, and drives waste gas out of the combustion chamber; the pistons of the two cylinders move towards the cylinder cover again, and then circulate, so that the horizontally-opposed multi-cylinder two-stroke direct injection engine is operated all the time.
Claims (10)
1. A horizontal opposed multi-cylinder two-stroke direct injection engine is characterized by comprising at least one pair of horizontally opposed cylinder bodies (1), wherein pistons (2) are arranged in the cylinder bodies; 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), the cylinder cover and the cylinder body form a combustion chamber (7), the cylinder cover is provided with a spark plug (15) and an electric control oil nozzle (16), the thickness of the cylinder cover corresponds to the height of an installation thread of the spark plug, and the electric control oil nozzle is connected with a fuel tank through an oil pump; the lower parts of the cylinder bodies are connected through a crank case (8), a crank shaft (9) is arranged in the crank case, and pistons in the two cylinders are respectively connected to the crank shaft through two connecting rods (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 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 horizontally opposed multi-cylinder two-stroke direct injection engine according to claim 1 wherein the cylinder block is cast from an aluminum alloy and the cylinder head is machined from an aluminum alloy; and radiating fins (14) are arranged outside the cylinder body and the cylinder cover.
3. The horizontally opposed multi-cylinder two-stroke direct injection engine according to claim 1 wherein the number of cylinders is a pair.
4. The horizontally opposed multi-cylinder two-stroke direct injection engine of claim 1 wherein said piston head is spherically convex.
5. The horizontally opposed multi-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 fuel injector and the two spark plugs are symmetrically disposed on opposite sides of the electronically controlled fuel injector and are inclined in the axial direction.
6. The horizontally opposed multi-cylinder two-stroke direct injection in-cylinder engine according to claim 1 wherein said cylinder head is provided with an electrically controlled injector and a spark plug, the spark plug being disposed at a central axis of the cylinder head, the electrically controlled injector being disposed on a side of the spark plug and being inclined toward the axial center.
7. The horizontally opposed multi-cylinder two-stroke direct injection in-cylinder engine according to claim 1 wherein said cylinder head is provided with an electronically controlled fuel injector and a spark plug, the electronically controlled fuel injector being disposed at a central axis of the cylinder head and the spark plug being disposed on a side of the electronically controlled fuel injector and inclined toward the axial center.
8. The horizontally opposed multi-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 which is disposed about the central axis and forms an equilateral triangle and is inclined toward the central axis.
9. The horizontally opposed multi-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, the electronically controlled fuel injector and spark plug being positioned centrally symmetrically about the central axis of the cylinder head and inclined toward the axial center.
10. The horizontally opposed multi-cylinder two-stroke direct injection engine according to any one of claims 5 to 9 wherein the fuel of the horizontally opposed multi-cylinder two-stroke direct injection engine is heavy oil, gasoline or diesel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073457.7U CN215057744U (en) | 2021-05-19 | 2021-05-19 | Horizontally-opposed multi-cylinder two-stroke in-cylinder direct injection engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073457.7U CN215057744U (en) | 2021-05-19 | 2021-05-19 | Horizontally-opposed multi-cylinder two-stroke in-cylinder direct injection engine |
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| CN215057744U true CN215057744U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121073457.7U Active CN215057744U (en) | 2021-05-19 | 2021-05-19 | Horizontally-opposed multi-cylinder two-stroke in-cylinder direct injection engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439609A (en) * | 2021-12-30 | 2022-05-06 | 中国人民解放军总参谋部第六十研究所 | Multi-cylinder two-stroke engine capable of realizing time-sharing ignition |
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2021
- 2021-05-19 CN CN202121073457.7U patent/CN215057744U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439609A (en) * | 2021-12-30 | 2022-05-06 | 中国人民解放军总参谋部第六十研究所 | Multi-cylinder two-stroke engine capable of realizing time-sharing ignition |
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