CN209875304U - Opposed-piston three-stroke internal combustion linear generator set - Google Patents
Opposed-piston three-stroke internal combustion linear generator set Download PDFInfo
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- CN209875304U CN209875304U CN201920080572.3U CN201920080572U CN209875304U CN 209875304 U CN209875304 U CN 209875304U CN 201920080572 U CN201920080572 U CN 201920080572U CN 209875304 U CN209875304 U CN 209875304U
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000002000 scavenging effect Effects 0.000 abstract description 2
- 230000007847 structural defect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Output Control And Ontrol Of Special Type Engine (AREA)
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Abstract
The utility model discloses an opposition piston three-stroke internal combustion linear generator set belongs to the piston internal-combustion engine field, and its structure is: the motor comprises a machine body, wherein a coil winding, an armature and a main shaft are sequentially arranged from the machine body to the interior of the machine body, and a main shaft position sensor is fixed on the main shaft; the most important is that two pistons are oppositely arranged, namely the two pistons are respectively oppositely arranged at two ends of the main shaft and are coaxially arranged with the armature; each piston is provided with corresponding fittings including hydraulic exhaust valves, intake valves, air inlets, spark plugs, etc. The utility model is provided with the opposed pistons, and the air inlet valve is arranged on the pistons, thus solving the structural defect of the scavenging port of the two-stroke engine; meanwhile, the stroke of the engine is reorganized, the inherent defects of the two-stroke engine are overcome, and the emission and oil consumption level of the engine can be improved.
Description
Technical Field
The utility model belongs to the piston internal-combustion engine field, especially an opposition piston three-stroke internal-combustion engine takes linear generator set, can be used to organize the combustion process of spark-ignition formula and compression ignition formula free piston internal-combustion generator set.
Background
In recent years, linear free piston internal combustion generator sets have been receiving attention from researchers due to the energy problem and environmental pollution problem of internal combustion engines, and have related research results in China and other countries. However, the existing free piston generator sets are basically developed based on the two-stroke principle, so that the inherent disadvantages of the two-stroke internal combustion engine are not preserved on the upper free piston internal combustion generator set.
SUMMERY OF THE UTILITY MODEL
In order to solve some inherent shortcomings that free piston generating set based on two-stroke internal-combustion engine principle has to combine the characteristics of free piston engine, the utility model provides an opposition piston three-stroke internal-combustion linear generating set.
In order to solve the technical problem, the utility model discloses a technical scheme is:
an opposed piston three-stroke internal combustion linear generator set comprises a machine body, a coil winding, an armature and a main shaft are sequentially arranged from the machine body to the interior of the machine body, and a main shaft position sensor is fixed on the main shaft;
a first cylinder barrel is fixed on the left side of the machine body, a first piston is arranged in the first cylinder barrel, and a first piston ring is arranged in a ring groove of the first piston; the left side and the right side of the first piston are respectively provided with a first cylinder cavity and a first air cavity; a first hydraulic exhaust valve and a first spark plug are fixed on a first cylinder barrel on the side of a first cylinder cavity, the head of the first hydraulic exhaust valve faces the first cylinder cavity, a first air inlet is formed in the first cylinder barrel on the side of a first air cavity, and a one-way valve which only allows air to flow into an engine is mounted on the first air inlet; a first air inlet valve is arranged on the first piston, and the head of the first air inlet valve faces the first cylinder cavity; a first timing cam is mounted on the first cylinder barrel and connected to a first motor through a first cam shaft, the first cam shaft is perpendicular to the first air inlet valve, and the position of the first timing cam corresponds to the position of the tail part of the first air inlet valve;
a second cylinder barrel is fixed on the right side of the machine body, a second piston is arranged in the second cylinder barrel, and a second piston ring is arranged in a ring groove of the second piston; the left side and the right side of the second piston are respectively provided with a second air cavity and a second air cylinder cavity, a second hydraulic exhaust valve and a second spark plug are fixed on a second air cylinder barrel on the side of the second air cylinder cavity, the head of the second hydraulic exhaust valve faces the second air cylinder cavity, a second air inlet is formed in the second air cylinder barrel on the side of the second air cavity, and a one-way valve only allowing air to flow into the engine is mounted on the second air inlet; a second air inlet valve is arranged on the second piston, and the head of the second air inlet valve faces the second air cylinder cavity; a second timing cam is mounted on the second cylinder barrel and connected to a second motor through a second cam shaft, the second cam shaft is perpendicular to the second air inlet valve, and the position of the second timing cam corresponds to the position of the tail part of the second air inlet valve;
a first piston is fixed on the left side of the main shaft, and a second piston is fixed on the right side of the main shaft to form an opposed piston; the electronic control unit ECU receives information from the main shaft position sensor, comprises position information and frequency information, and controls the ignition time of the first spark plug and the second spark plug, the fuel injection quantity of the fuel injector and the rotation of the first motor and the second motor according to the received information of the main shaft position sensor.
Further, there are two pairs of the first hydraulic exhaust valve, the first intake valve, and the first timing cam; there are also two pairs of the second hydraulic exhaust valve, the second intake valve, and the second timing cam.
Further, there are two first air inlets and two second air inlets.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the stroke of the engine is reorganized, the inherent defects of the two-stroke engine are overcome, and the emission and oil consumption level of the engine is favorably improved.
2) The air inlet valve is arranged on the piston, so that the structural defect of a scavenging port of the two-stroke engine is overcome.
3) The variable valve timing and lift can be achieved by controlling the control cam of the intake valve with the motor, providing a prerequisite for optimizing the performance of the free piston engine.
Drawings
Fig. 1 is a schematic structural view of an opposed-piston three-stroke internal combustion linear generator set of the present invention.
In the figure: 1-body; 2-a coil winding; 3-an armature; 4-a main shaft; 5-a spindle position sensor; 101-a first hydraulic exhaust valve; 102-a first cylinder; 103-a first cylinder chamber; 104-a first intake valve; 105-a first air inlet; 106-a first air chamber; 107-first timing cam; 108-a first camshaft; 109-a first motor; 110-a first piston; 111-a first piston ring; 112-a first spark plug; 201-second hydraulic exhaust valve; 202-a second cylinder barrel; 203-a second cylinder chamber; 204-second intake valve; 205-a second air inlet; 206-a second air cavity; 207-second timing cam; 208-a second camshaft; 209-a second motor; 210-a second piston; 211-a second piston ring; 212-second spark plug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model relates to an opposed piston three-stroke internal combustion linear generator set, its structure includes generator portion, free piston internal-combustion engine part and control system, specifically as follows:
the generator part: the magnetic motor comprises a machine body 1, wherein a coil winding 2 (a fixed part fixed on the machine body 1), an armature 3 (a movable part) and a main shaft 4 are sequentially arranged from the machine body 1 to the interior of the machine body, and a main shaft position sensor 5 is fixed on the main shaft 4;
the free piston internal combustion engine part (including cylinder barrel, two sets of piston components, two sets of air inlet systems, two sets of exhaust systems, two spark plugs and the like): a first cylinder barrel 102 is fixed on the left side of the machine body 1, a first piston 110 is arranged in the first cylinder barrel 102, and a first piston ring 111 is arranged in a ring groove of the first piston 110; the left side and the right side of the first piston 110 are respectively provided with a first cylinder cavity 103 and a first air cavity 106; a first hydraulic exhaust valve 101 and a first spark plug 112 are fixed on the first cylinder barrel 102 on the side of the first cylinder cavity 103 (a hydraulic component is mounted on the first hydraulic exhaust valve 101, and can drive the first hydraulic exhaust valve 101 to open and close; the first spark plug 112 is mounted beside the first hydraulic exhaust valve 101), the head of the first hydraulic exhaust valve 101 faces the first cylinder cavity 103, a first air inlet 105 is formed on the first cylinder barrel 102 on the side of the first air cavity 106, and a one-way valve which only allows air to flow into an engine is mounted on the first air inlet 105; the first piston 110 is provided with a first air inlet valve 104, and the head part of the first air inlet valve 104 faces the first cylinder cavity 103; a first timing cam 107 is mounted on the first cylinder barrel 102, the first timing cam 107 is connected to a first motor 109 through a first cam shaft 108, the first cam shaft 108 is perpendicular to the first air inlet valve 104, and the position of the first timing cam 107 corresponds to the position of the tail part of the first air inlet valve 104;
a second cylinder barrel 202 is fixed on the right side of the machine body 1, a second piston 210 is arranged in the second cylinder barrel 202, and a second piston ring 211 is arranged in a ring groove of the second piston 210; the left side and the right side of the second piston 210 are respectively provided with a second air cavity 206 and a second cylinder cavity 203, a second hydraulic exhaust valve 201 and a second spark plug 212 are fixed on the second cylinder barrel 202 at the side of the second cylinder cavity 203 (a hydraulic component is mounted on the second hydraulic exhaust valve 201 and can drive the second hydraulic exhaust valve 201 to open and close; the second spark plug 212 is mounted beside the second hydraulic exhaust valve 201), the head of the second hydraulic exhaust valve 201 faces the second cylinder cavity 203, the second cylinder barrel 202 at the side of the second air cavity 206 is provided with a second air inlet 205, and the second air inlet 205 is provided with a one-way valve which only allows air to flow into the engine; the second piston 210 is provided with a second air inlet valve 204, and the head part of the second air inlet valve 204 faces the second cylinder cavity 203; a second timing cam 207 is installed on the second cylinder barrel 202, the second timing cam 207 is connected to a second motor 209 through a second cam shaft 208, the second cam shaft 208 is perpendicular to the second air inlet valve 204, and the position of the second timing cam 207 corresponds to the position of the tail part of the second air inlet valve 204;
the first piston 110 is fixed on the left side of the main shaft 4, the second piston 210 is fixed on the right side of the main shaft 4, and opposed pistons are formed, namely the two pistons are respectively installed at two ends of the main shaft 4 in an opposed mode, and the pistons and the armature 3 are installed coaxially;
the control system comprises: the device comprises an electronic control unit ECU, wherein the electronic control unit ECU receives information from a main shaft position sensor 5, comprises position information and frequency information, and controls the ignition timing of a first spark plug 112 and a second spark plug 212, the fuel injection quantity of an injector and the rotation of a first motor 109 and a second motor 209 according to the information received from the main shaft position sensor 5 (the first motor 109 and the second motor 209 drive a first camshaft 108 and a second camshaft 208 to rotate respectively, and finally the distance between a timing cam on the camshaft and the tail part of an intake valve can be changed, which is equivalent to changing the lift curve of the engine valve).
Of course, in a practical genset application, there are two pairs of first hydraulic exhaust valve 101, first intake valve 104, and first timing cam 107; there are also two pairs of the second hydraulic exhaust valve 201, the second intake valve 204, and the second timing cam 207. There are two first air inlets 105 and two second air inlets 205.
The working process of the opposed-piston three-stroke internal combustion linear generator set (mainly a piston internal combustion engine part) adopting the structure is as follows:
in the engine stop state, the intake valve and the exhaust valve of one cylinder are required to be fully closed. Taking the full closing of the valve of the first cylinder (the cylinder on the left side in the figure 1) as an example, in the shutdown state, the first cylinder is fully closed, premixed fuel gas is in the cylinder, the ignition of the first cylinder is controlled, the pressure of the first cylinder rises, the moving part is pushed to the right, the second cylinder (the cylinder on the right side in the figure 1) is compressed, the second cylinder is compressed to a proper position, the ignition of the second cylinder is carried out, and the engine can be started by reciprocating.
During operation, when the piston moves to the left, the pressure in the first cylinder rises after the first intake valve 104 closes, and ignition is carried out at a certain moment; meanwhile, the first air cavity 106 becomes large, and air enters the first air cavity 106 under the action of vacuum; meanwhile, the second air chamber 206 becomes smaller, and because the air chamber is provided with a one-way valve, the pressure of the second air chamber 206 can rise, which is equivalent to pressurization, and when the second air inlet valve 204 is opened after the air chamber moves to a certain position, the air can enter the second air cylinder under the action of positive pressure. After the first ignition, the pressure in the first cylinder can rise sharply, and finally the piston can be pushed to move rightwards; after the piston moves to a certain position, the first hydraulic exhaust valve 101 is opened to exhaust, and the second intake valve 204 is closed without definite relation with the opening of the first hydraulic exhaust valve 101; after the second intake valve 204 is closed, the pressure in the second cylinder rises, and ignition is carried out at a certain moment; meanwhile, the second air cavity 206 becomes larger, and air enters the second air cavity 206 under the action of vacuum; meanwhile, the first air chamber 106 becomes smaller, and because the air chamber is provided with a one-way valve, the pressure of the first air chamber 106 can rise, which is equivalent to pressurization, when the first air inlet valve 104 is opened after moving to a certain position, air can enter the first air cylinder under the action of positive pressure. After the second cylinder is fired, a similar process to that of the first cylinder is repeated.
During the entire operation, the cylinder of the engine comprises 3 independent strokes: (1) the air inlet and compression strokes are carried out, when the free piston of the engine is at the far end, the air inlet valve on the piston is opened, and air enters the cylinder cavity from the air cavity under the action of positive air pressure in the air cavity; after the intake valve closes, the piston compresses the cylinder volume from the far end, and the main function of this stroke is to compress the air in preparation for ignition. (2) The engine performs expansion work, freely exhausts and scavenges, after the volume of the engine is compressed to the minimum volume, the engine is ignited, then the gas in the cylinder performs expansion work, when the gas is expanded to a certain degree, the hydraulic exhaust valve is opened, and the engine starts to exhaust freely; after freely exhausting to a certain degree, the inlet valve is opened, and air enters the air cylinder cavity under the action of positive pressure air in the air cavity to sweep out waste gas in the air cylinder cavity. (3) The air intake and pre-compression stroke is that when the piston compresses the air in the cylinder cavity, the vacuum formed on the back of the piston sucks the air into the air cavity of the engine from the outside; when the high-pressure gas in the cylinder cavity applies work to the piston, the back surface of the piston pre-compresses air entering the air cavity of the engine.
Claims (3)
1. An opposed piston three-stroke internal combustion linear generator set comprises a machine body (1), and is characterized in that a coil winding (2), an armature (3) and a main shaft (4) are sequentially arranged from the machine body (1) to the interior of the machine body, and a main shaft position sensor (5) is fixed on the main shaft (4);
a first cylinder barrel (102) is fixed on the left side of the machine body (1), a first piston (110) is arranged in the first cylinder barrel (102), and a first piston ring (111) is arranged in a ring groove of the first piston (110);
the left side and the right side of the first piston (110) are respectively provided with a first cylinder cavity (103) and a first air cavity (106); a first hydraulic exhaust valve (101) and a first spark plug (112) are fixed on a first cylinder barrel (102) on the side of a first cylinder cavity (103), the head of the first hydraulic exhaust valve (101) faces the first cylinder cavity (103), a first air inlet (105) is formed in the first cylinder barrel (102) on the side of a first air cavity (106), and a one-way valve which only allows air to flow into an engine is mounted on the first air inlet (105);
a first air inlet valve (104) is arranged on the first piston (110), and the head of the first air inlet valve (104) faces the first cylinder cavity (103);
a first timing cam (107) is mounted on the first cylinder barrel (102), the first timing cam (107) is connected to a first motor (109) through a first cam shaft (108), the first cam shaft (108) is perpendicular to the first air inlet valve (104), and the position of the first timing cam (107) corresponds to the position of the tail part of the first air inlet valve (104);
a second cylinder barrel (202) is fixed on the right side of the machine body (1), a second piston (210) is arranged in the second cylinder barrel (202), and a second piston ring (211) is arranged in a ring groove of the second piston (210);
a second air cavity (206) and a second cylinder cavity (203) are respectively arranged at the left side and the right side of the second piston (210), a second hydraulic exhaust valve (201) and a second spark plug (212) are fixed on a second cylinder barrel (202) at the side of the second cylinder cavity (203), the head of the second hydraulic exhaust valve (201) faces the second cylinder cavity (203), a second air inlet (205) is formed in the second cylinder barrel (202) at the side of the second air cavity (206), and a one-way valve which only allows air to flow into the engine is installed on the second air inlet (205);
a second air inlet valve (204) is arranged on the second piston (210), and the head of the second air inlet valve (204) faces the second cylinder cavity (203);
a second timing cam (207) is mounted on the second cylinder barrel (202), the second timing cam (207) is connected to a second motor (209) through a second cam shaft (208), the second cam shaft (208) is perpendicular to a second air inlet valve (204), and the position of the second timing cam (207) corresponds to the tail position of the second air inlet valve (204);
a first piston (110) is fixed on the left side of the main shaft (4), and a second piston (210) is fixed on the right side of the main shaft to form an opposite piston; the ignition control device further comprises an electronic control unit ECU, the electronic control unit ECU receives information from the spindle position sensor (5), comprises position information and frequency information, and controls the ignition timing of the first spark plug (112) and the second spark plug (212), the fuel injection quantity of the fuel injector and the rotation of the first motor (109) and the second motor (209) according to the received information of the spindle position sensor (5).
2. An opposed-piston three-stroke internal combustion linear genset as in claim 1 wherein there are two pairs of the first hydraulic exhaust valve (101), first intake valve (104) and first timing cam (107); and two pairs of the second hydraulic exhaust valve (201), the second intake valve (204) and the second timing cam (207) are also arranged.
3. An opposed-piston three-stroke internal combustion linear generator set according to claim 1, wherein there are two first air inlets (105) and two second air inlets (205).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920080572.3U CN209875304U (en) | 2019-01-16 | 2019-01-16 | Opposed-piston three-stroke internal combustion linear generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920080572.3U CN209875304U (en) | 2019-01-16 | 2019-01-16 | Opposed-piston three-stroke internal combustion linear generator set |
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| Publication Number | Publication Date |
|---|---|
| CN209875304U true CN209875304U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920080572.3U Expired - Fee Related CN209875304U (en) | 2019-01-16 | 2019-01-16 | Opposed-piston three-stroke internal combustion linear generator set |
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| CN (1) | CN209875304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736945A (en) * | 2019-01-16 | 2019-05-10 | 西华大学 | A kind of opposed pistons three-stroke internal combustion linear generating unit |
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2019
- 2019-01-16 CN CN201920080572.3U patent/CN209875304U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736945A (en) * | 2019-01-16 | 2019-05-10 | 西华大学 | A kind of opposed pistons three-stroke internal combustion linear generating unit |
| WO2020147678A1 (en) * | 2019-01-16 | 2020-07-23 | 西华大学 | Opposed-piston, three-stroke internal combustion linear generator |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |