CN215370035U - Straight-line multi-cylinder two-stroke direct injection engine - Google Patents
Straight-line multi-cylinder two-stroke direct injection engine Download PDFInfo
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- CN215370035U CN215370035U CN202121073761.1U CN202121073761U CN215370035U CN 215370035 U CN215370035 U CN 215370035U CN 202121073761 U CN202121073761 U CN 202121073761U CN 215370035 U CN215370035 U CN 215370035U
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Abstract
The utility model provides an in-line multicylinder two-stroke cylinder internal direct injection engine, relates to two-stroke engine technical field, concretely relates to in-line multicylinder two-stroke cylinder internal direct injection engine suitable for unmanned aerial vehicle. The device comprises at least two cylinder bodies arranged side by side, wherein the lower parts of the cylinder bodies are respectively connected with a crankcase, and the crankcase is connected with a 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; the outer end of the air inlet channel is provided with an electronic turbocharger; the pistons in the cylinders are respectively connected to corresponding crankshafts through connecting rods, and the crankshafts are mutually connected. The cylinder cover is formed by machining the aluminum alloy, so that the strength is better, and the cylinder cover is safer and more reliable; the plurality of cylinder bodies are arranged in line, so that the stability of low-speed operation is improved, and the power loss is reduced.
Description
The technical field is as follows:
the utility model relates to the technical field of two-stroke engines, in particular to an in-line multi-cylinder two-stroke in-cylinder direct injection engine suitable for an 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 is unstable at low speed operation.
The utility model content is as follows:
the utility model aims to provide an in-line multi-cylinder two-stroke in-cylinder direct injection engine to achieve the purposes of improving fuel combustion efficiency, saving oil, improving low-speed operation stability and improving engine power.
The utility model provides an in-line multi-cylinder two-stroke direct injection engine which is characterized by comprising at least two cylinder bodies which are arranged side by side, wherein 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 a plurality of exhaust passages are connected with the same 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 respectively connected with a crankcase, and the crankcase is connected with a 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; the outer end of the air inlet channel is provided with an electronic turbocharger; the pistons in the cylinders are respectively connected to corresponding crankshafts through connecting rods, and the crankshafts are mutually connected.
Further, the number of the cylinder bodies is two.
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 in-line multi-cylinder two-stroke direct injection engine is heavy oil, gasoline, diesel oil and the like.
The in-line multi-cylinder two-stroke in-cylinder direct injection engine provided by the utility model uses an in-cylinder direct injection system, so that fuel oil directly enters air, and the pollution to the environment is reduced; 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%; the cylinder blocks are arranged in series, so that the stability of low-speed operation is improved, and the power loss is reduced.
Description of the drawings:
the utility model is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of the present invention;
FIG. 4 is a cross-sectional view taken at B-B of the present invention;
FIG. 5 is a schematic view of the cylinder head of the present invention with the spark plug and electronically controlled fuel injector arranged symmetrically about the central axis of the cylinder head;
FIG. 6 is a schematic view of the spark plug of the present invention disposed at the center axis of the cylinder head with an electronically controlled fuel injector disposed on one side;
FIG. 7 is a schematic view of the electrically controlled fuel injector of the present invention disposed on the center axis of the cylinder head with the spark plug disposed on one side
FIG. 8 is a schematic view of a cylinder head "in-line" arrangement of two spark plugs and an electrically controlled fuel injector according to the present invention;
fig. 9 is a schematic view of a triangular arrangement of two spark plugs and an electrically controlled fuel injector according to the present invention.
The specific implementation mode is as follows:
as shown in fig. 1-4, the in-line multi-cylinder two-stroke direct injection engine has light weight and large efficiency ratio required by the unmanned aerial vehicle engine, so that two hollow cylinder bodies 1 are cast by using aluminum alloy, radiating fins 14 integrally cast are arranged outside the cylinder bodies, spherical convex pistons 2 are arranged in the cylinder bodies, exhaust passages 3 and scavenging passages 4 are arranged on the side walls of the cylinder bodies, 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 to the corresponding crank cases 8 through bolts, the two cylinder bodies are arranged in parallel and in line, crankshafts 9 are arranged in the crank cases, and the crank cases are connected with the combustion chambers 7 through scavenging passages; the pistons in the two cylinder bodies are respectively connected with the corresponding crankshafts in the crank cases through connecting rods 10, the crankshafts are mutually connected, and the end parts of the crankshafts are connected with a rotating shaft; each crankcase is provided with an air inlet, a one-way valve 11 is arranged at the position of each air inlet, the outer end of each one-way valve is connected with an air inlet channel 17, and the upper side wall of each air inlet channel is provided with a lubricating oil port 12 which 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. 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 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. 6, 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. 7, 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. 8, a mounting hole of the electrically controlled fuel injector is machined at the central axis of the cylinder head, and a mounting threaded hole of the spark plug 15 is machined at the symmetrical positions on both sides of the mounting hole of the electrically controlled fuel injector 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. 9, 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 formed around the cylinder head, and 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.
Taking a straight-line double-cylinder two-stroke in-cylinder direct injection engine as an example, in the actual working process, the motion directions of the pistons in the two cylinders are opposite; air is blown into the air inlet channel through the electronic turbocharger, the piston of the air cylinder moves towards the direction of the 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 and the air enter the crankcase together to lubricate parts such as a crankshaft, a connecting rod, a piston 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 piston of the cylinder moves towards the direction of the crankshaft, and air in the crankcase enters a combustion chamber formed by the cylinder body and the cylinder cover through a scavenging passage along with the action of the piston to drive waste gas out of the combustion chamber; the piston of the cylinder moves towards the direction of the cylinder cover again, and then the cycle is carried out, so that the straight-line multi-cylinder two-stroke direct injection engine is operated all the time. The two cylinders are matched with each other to drive the crankshaft to rotate, so that the stability of low-speed operation is improved.
Claims (10)
1. An in-line multi-cylinder two-stroke direct injection engine is characterized by comprising at least two cylinder bodies (1) which are arranged side by side, 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 pistons, and a plurality of exhaust passages are connected with the same 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), and the thickness of the cylinder cover corresponds to the height of an installation thread of the spark plug (15); the electric control oil nozzle is connected with the fuel tank through an oil pump; the lower parts of the two cylinder bodies are respectively connected with a crankcase (8), and 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; the outer end of the air inlet channel is provided with an electronic turbocharger (13); the pistons in the two cylinders are respectively connected to corresponding crankshafts through connecting rods, and the crankshafts are mutually connected.
2. The in-line multi-cylinder two-stroke direct injection engine of claim 1 wherein said number of cylinders is two.
3. The in-line multi-cylinder two-stroke direct injection 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.
4. The in-line multi-cylinder two-stroke direct injection engine of claim 1 wherein said piston head is spherically convex.
5. The in-line multi-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, the electronically controlled injector and spark plug being positioned centrally symmetrically about the central axis of the cylinder head and inclined toward the axial center.
6. The in-line multi-cylinder two-stroke direct injection in cylinder engine of 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 in-line multi-cylinder two-stroke direct injection in-cylinder engine of claim 1 wherein the cylinder head is provided with an electronically controlled injector and a spark plug, the electronically controlled injector being disposed at the 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 in-line multi-cylinder two-stroke direct injection in-cylinder engine of 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 are inclined in the axial direction.
9. The in-line 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 said electronically controlled injector and two spark plugs being disposed about said central axis and forming an equilateral triangle and being inclined toward said central axis.
10. The in-line multi-cylinder two-stroke direct injection engine according to any one of claims 5 to 9, wherein the fuel of the in-line multi-cylinder two-stroke direct injection engine is heavy oil, gasoline or diesel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073761.1U CN215370035U (en) | 2021-05-19 | 2021-05-19 | Straight-line multi-cylinder two-stroke direct injection engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121073761.1U CN215370035U (en) | 2021-05-19 | 2021-05-19 | Straight-line multi-cylinder two-stroke direct injection engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215370035U true CN215370035U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121073761.1U Active CN215370035U (en) | 2021-05-19 | 2021-05-19 | Straight-line multi-cylinder two-stroke direct injection engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215370035U (en) |
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2021
- 2021-05-19 CN CN202121073761.1U patent/CN215370035U/en active Active
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