CN220566172U - Auxiliary air integrated air pump of ignition type low-pressure in-cylinder direct injection engine - Google Patents
Auxiliary air integrated air pump of ignition type low-pressure in-cylinder direct injection engine Download PDFInfo
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- CN220566172U CN220566172U CN202320628204.4U CN202320628204U CN220566172U CN 220566172 U CN220566172 U CN 220566172U CN 202320628204 U CN202320628204 U CN 202320628204U CN 220566172 U CN220566172 U CN 220566172U
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- piston
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- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 239000000295 fuel oil Substances 0.000 abstract description 12
- 238000000889 atomisation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Abstract
An auxiliary air integrated air pump of a direct injection engine in an ignition type low-pressure cylinder directly or indirectly drives an eccentric wheel to rotate, the eccentric wheel drives a piston to move up and down in a cylinder body through a transmission part, an air outlet channel and an air inlet channel are respectively arranged in the cylinder body, and valve plates or valves of the air outlet channel and the air inlet channel are alternately opened. The utility model can be applied to the heavy oil internal combustion engine using the air-assisted atomization device, the air pump and the internal combustion engine are integrated, the structure is simple, the transmission adopts gear transmission, the error is small, the precision is high, the phase control is accurate, the atomization effect of the heavy oil is optimized, and the combustion efficiency of the engine is improved.
Description
Technical Field
The utility model relates to the technical field of internal combustion engines, in particular to an auxiliary air integrated air pump of an ignition type low-pressure in-cylinder direct injection engine.
Background
The piston type internal combustion engine is used as a power device and widely applied to various vehicles and devices of fuel energy sources. Compared with gasoline, the heavy oil has the characteristics of high viscosity, high flash point and the like, is safe and reliable to transport and store, is universal for oil in various military fields, and can be simplified and ensured. However, the heavy oil has high viscosity, poor flow performance and poor atomization and evaporation effects at low temperature, and the air-assisted atomization device is generally adopted to realize good atomization of the heavy oil under the low-pressure injection condition. The atomized auxiliary gas is provided by an air compression pump on the engine, the air injection valve is matched with the oil injection valve when in operation, so that the fuel oil and the fresh air are uniformly mixed, and the fuel is torn into atomized particles with SMD smaller than 20 mu m through a Laval structure of the air injection valve, and enters a combustion chamber of the engine for combustion; usually, the small four-stroke engine is mostly an external air pump, and the air pump drives a belt pulley to drive through a crankshaft.
The existing external air pump has the following defects: the external air pump has a plurality of transmission mechanisms, so that the structure is complex, the weight is large, and the occupied space is large; and the air pump drives non-integrated design, spare part is too much and the structure is complicated, can lead to the stack of error, causes the increase of engine gross weight and the increase of maintaining the degree of difficulty and air pump phase control inaccuracy, can't provide auxiliary air for air auxiliary type atomizing device is accurate stable, influences heavy oil atomizing characteristic, finally leads to the engine combustion nonideal.
Disclosure of Invention
The utility model aims to provide an auxiliary gas integrated air pump of an ignition type low-pressure in-cylinder direct injection engine, which can be applied to a heavy oil internal combustion engine using an air auxiliary atomization device, has the advantages of simple structure, light weight and small occupied space, adopts internal direct connection transmission in transmission, has small error, high precision and precise phase control, optimizes the atomization effect of heavy oil, and improves the combustion efficiency of the engine.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
there are two structural forms:
first kind: the auxiliary air integrated air pump of the direct injection engine in the ignition type low-pressure cylinder directly or indirectly drives the eccentric wheel to rotate, the eccentric wheel drives the piston to move up and down in the cylinder body through the transmission part, the cylinder body is respectively provided with an air outlet channel and an air inlet channel, and valve plates or valves of the air outlet channel and the air inlet channel are alternately opened.
The inner cavity of the cylinder body of the cylinder is connected with the air inlet chamber through an air inlet, and an air inlet valve plate is arranged below the air inlet; the inner cavity of the cylinder body is connected with an air outlet chamber through an air outlet, an air outlet valve plate is arranged above the air outlet, and the air outlet chamber is connected with an air injection valve on the engine through an air outlet joint. The air inlet valve plate is fixed on the cylinder body through a pin. In the downward movement process of the piston, the cylinder is internally provided with negative pressure, air in the air inlet chamber forces the air inlet valve plate to bend downwards to the step, and the air enters the inner cavity of the cylinder body from the gap, at the moment, the air outlet is sealed by the air outlet valve plate, and the inner cavity of the cylinder body and the air outlet chamber are not in gas exchange; in the upward movement process of the piston, the air pressure in the inner cavity of the cylinder body is increased, the air pressure lifts the air outlet valve plate, air enters the air outlet chamber from the air outlet, at the moment, the air inlet is sealed by the air inlet valve plate, and the inner cavity of the cylinder body and the air inlet chamber do not exchange gas; thereby completing the supply of air.
And an air outlet valve plate fixing plate is arranged above the air outlet. The valve plate fixing plate can prevent the valve plate from being excessively bent to generate permanent deformation.
The large end of the connecting rod is sleeved on the eccentric wheel, the small end of the connecting rod is sleeved on the piston pin, and the piston pin is fixedly connected with the piston. The bearing is a needle bearing, the eccentric wheel is provided with an eccentric hole, and the gear transmission shaft passes through the eccentric hole and is in interference fit with the eccentric wheel and is fixed on the gear transmission shaft through a key.
The crankshaft indirectly drives the eccentric wheel to rotate, a bevel gear A is arranged on the crankshaft, the bevel gear A is meshed with a bevel gear B, the bevel gear B is arranged on the valve transmission shaft, a gear B is further arranged on the valve transmission shaft, the gear B is meshed with the gear A, the gear A is arranged on the gear transmission shaft, and the eccentric wheel is arranged on the gear transmission shaft. The power of the crankshaft can be connected with the piston under the layout of the existing crankshaft and other parts of the internal combustion engine through the meshing transmission of the multistage gears.
The working principle of the air pump is as follows: the engine crankshaft, the valve transmission shaft and the gear transmission shaft are all provided with transmission gears, the engine crankshaft rotates, and the transmission gears are meshed and transmitted through the gears, and the engine crankshaft passes through: the power transmission is carried out on the paths of the crankshaft, the bevel gear A, the bevel gear B, the valve transmission shaft, the gear B, the gear A, the gear transmission shaft, the eccentric wheel, the air pump connecting rod and the piston, so that the air pump piston can reciprocate in the piston cylinder.
The path of the air intake flow is as follows: the air inlet joint, the air inlet chamber, the air inlet valve plate, the piston cylinder, the air outlet valve plate, the air outlet chamber and the air outlet joint realize the supply of a compressed air source to the air injection valve. (dash unification)
Second kind: the auxiliary air integrated air pump of the direct injection engine in the ignition type low-pressure cylinder directly or indirectly drives the eccentric wheel to rotate, the eccentric wheel drives the piston to move up and down in the cylinder body through the transmission part, the cylinder body is respectively provided with an air outlet channel and an air inlet channel, and valve plates or valves of the air outlet channel and the air inlet channel are alternately opened.
The side wall of the cylinder body of the cylinder is provided with a plurality of air inlets, the upper end of the cylinder body is covered by a movable air outlet valve block, an air outlet chamber is arranged above the air outlet valve block, an upper end cover is arranged above the air outlet chamber, the lower end surface of the upper end cover is provided with a valve block pressure spring, and the lower end of the valve block pressure spring is connected with the air outlet valve block and gives precompression.
The outer circle edge of the eccentric wheel is contacted with the piston roller, the piston roller is sleeved on the piston pin through a bearing, and the piston pin is fixedly connected with the piston; the outer edge of the side wall of the cylinder body is provided with a return spring, a return spring fixing seat with matched positions is arranged below the return spring, and the spring fixing seat is fixedly connected with the piston pin.
The working principle of the air pump is as follows:
when the engine works, the eccentric wheel on the crankshaft is driven to rotate, the eccentric wheel jacks up the piston roller to move through eccentric motion, and the piston can reset downwards under the restoring action of the return spring, so that the piston realizes up-and-down reciprocating motion; when the piston moves upwards, when the upper end surface of the piston ring just covers the upper end of the gas guide hole, the valve plate is opened upwards, and compressed gas is conveyed to the gas injection valve through the gas outlet; when the piston starts to move downwards from the upper dead point, the valve plate is re-seated on the first concave spigot of the air pump cylinder body due to the elasticity of the spring and self gravity, and fresh air enters the air pump cylinder body through the air guide hole to wait for the next compression.
The utility model has the advantages that:
1. the utility model is applied to a heavy oil injection system, a heavy oil internal combustion engine using an air auxiliary atomization device, an air pump and the internal combustion engine are integrated, the structure is simple, a transmission structure is integrated in the engine, if the structure allows, a crankshaft can be directly connected with an eccentric wheel to drive a piston to move up and down, if the structure is compact or the position of the crankshaft is far away from a cylinder, the connection can be realized by the transmission mechanism indirectly, the connection mode is various, and the connection condition of the crankshaft and the piston under different scenes can be used.
2. The crankshaft and the piston are connected through the gears, so that the error is small, the precision is high, and the phase control is accurate; the rotation speed of the crankshaft is in direct proportion to the air inflow, and the engine running power is in hard match with the air inflow, so that the atomization effect of heavy oil is optimized, and the combustion efficiency of the engine is improved.
Description of the drawings:
FIG. 1 is a schematic view showing the internal structure of embodiment 1;
FIG. 2 is an enlarged schematic view of the structure shown at I in FIG. 1;
FIG. 3 is a schematic view showing the internal structure of embodiment 2;
the serial numbers and part names in the figures are: 11-an air inlet joint; 12-air inlet; 13-an air inlet valve plate; 21-a piston; 22-cylinder block; 23-piston rings; 31-an air outlet; 32-an air outlet valve plate; 33-an air outlet valve plate fixing plate; 34-an air outlet joint; 41-connecting rod; 42-bearing; 43-piston pin; 44-piston roller; 5-eccentric wheel; 51-gear drive shaft; 52-gear a; 61-valve drive shaft; 62-gear B; 63-bevel gear B; 7-a crankshaft; 71-bevel gear A; 8-an upper end cover; 81-valve plate compression springs; 91-a return spring fixing seat; 92-return spring.
Detailed Description
Example 1
An auxiliary air integrated air pump of a direct injection engine in an ignition type low-pressure cylinder is characterized in that a crankshaft 7 directly or indirectly drives an eccentric wheel 5 to rotate, the eccentric wheel 5 drives a piston 21 to move up and down in a cylinder body 22 through a transmission part, an air outlet channel and an air inlet channel are respectively arranged in the cylinder body 22, and valve plates of the air outlet channel and the air inlet channel are alternately opened.
The inner cavity of the cylinder body 22 is connected with the air inlet chamber through the air inlet 12, and an air inlet valve plate 13 is arranged below the air inlet 12; the inner cavity of the piston cylinder 22 is connected with an air outlet chamber through an air outlet 31, an air outlet valve plate 32 is arranged above the air outlet 31, and the air outlet chamber is connected with an air injection valve on the engine through an air outlet joint 34.
An air outlet valve plate fixing plate 33 is arranged above the air outlet 31.
The large end of the connecting rod 41 is sleeved on the eccentric wheel 5, the small end of the connecting rod 41 is sleeved on the piston pin 43 through the bearing 42, and the piston pin 43 is fixedly connected with the piston 21.
The crankshaft 7 indirectly drives the eccentric wheel 5 to rotate, a bevel gear A71 is arranged on the crankshaft 7, the bevel gear A71 is meshed with a bevel gear B63, the bevel gear B63 is arranged on the valve transmission shaft 61, a gear B62 is also arranged on the valve transmission shaft 61, the gear B62 is meshed with a gear A52, the gear A52 is arranged on the gear transmission shaft 51, and the eccentric wheel 5 is arranged on the gear transmission shaft 51.
Example 2
An auxiliary air integrated air pump of a direct injection engine in an ignition type low-pressure cylinder is characterized in that a crankshaft 7 directly or indirectly drives an eccentric wheel 5 to rotate, the eccentric wheel 5 drives a piston 21 to move up and down in a cylinder body 22 through a transmission part, an air outlet channel and an air inlet channel are respectively arranged in the cylinder body 22, and valve plates of the air outlet channel and the air inlet channel are alternately opened.
The side wall of the cylinder body 22 is provided with a plurality of air inlets 12, the upper end of the cylinder body 22 is covered by a movable air outlet valve plate 32, an air outlet chamber is arranged above the air outlet valve plate 32, an upper end cover 8 is arranged above the air outlet chamber, the lower end surface of the upper end cover 8 is provided with a valve plate pressure spring 81, and the lower end of the valve plate pressure spring 81 is connected with the air outlet valve plate 32 and gives precompression.
The outer circle edge of the eccentric wheel 5 is contacted with a piston roller 44, the piston roller 44 is sleeved on a piston pin 43 through a bearing 42, and the piston pin 43 is fixedly connected with the piston 21; the outer edge of the side wall of the cylinder body 22 is provided with a return spring 92, a return spring fixing seat 91 with matched positions is arranged below the return spring 92, and the spring fixing seat 91 is fixedly connected with the piston pin 43.
Claims (7)
1. An ignition type low-pressure in-cylinder direct injection engine auxiliary gas integrated air pump is characterized in that: the crankshaft (7) directly or indirectly drives the eccentric wheel (5) to rotate, the eccentric wheel (5) drives the piston (21) to move up and down in the cylinder body (22) through the transmission part, the cylinder body (22) is respectively provided with an air outlet channel and an air inlet channel, and valve plates or valves of the air outlet channel and the air inlet channel are alternately opened.
2. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump of claim 1, wherein: the inner cavity of the cylinder body (22) is connected with the air inlet chamber through the air inlet (12), and an air inlet valve plate (13) is arranged below the air inlet (12); the inner cavity of the cylinder body (22) is connected with an air outlet chamber through an air outlet (31), an air outlet valve plate (32) is arranged above the air outlet (31), and the air outlet chamber is connected with an air injection valve on the engine through an air outlet joint (34).
3. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump according to claim 2, characterized in that: an air outlet valve plate fixing plate (33) is arranged above the air outlet (31).
4. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump of claim 1, wherein: the eccentric wheel (5) is sleeved with the large end of the connecting rod (41), and the small end of the connecting rod (41) is sleeved with the piston pin (43) through the bearing (42).
5. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump of claim 1, wherein: the crankshaft (7) indirectly drives the eccentric wheel (5) to rotate, the bevel gear A (71) is arranged on the crankshaft (7), the bevel gear A (71) is meshed with the bevel gear B (63), the bevel gear B (63) is arranged on the valve transmission shaft (61), the gear B (62) is further arranged on the valve transmission shaft (61), the gear B (62) is meshed with the gear A (52), the gear A (52) is arranged on the gear transmission shaft (51), and the eccentric wheel (5) is arranged on the gear transmission shaft (51).
6. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump of claim 1, wherein: the side wall of the cylinder body (22) is provided with a plurality of air inlets (12), the upper end of the cylinder body (22) is covered by a movable air outlet valve plate (32), an air outlet chamber is arranged above the air outlet valve plate (32), an upper end cover (8) is arranged above the air outlet chamber, the lower end face of the upper end cover (8) is provided with a valve plate pressure spring (81), and the lower end of the valve plate pressure spring (81) is connected with the air outlet valve plate (32) and gives precompression.
7. The ignition type low-pressure in-cylinder direct injection engine auxiliary air integrated air pump of claim 1, wherein: the outer circle edge of the eccentric wheel (5) is in contact with a piston roller (44), the piston roller (44) is sleeved on a piston pin (43) through a bearing (42), and the piston pin (43) is fixedly connected with the piston (21); the outer edge of the side wall of the cylinder body (22) is provided with a return spring (92), a return spring fixing seat (91) with matched positions is arranged below the return spring (92), and the spring fixing seat (91) is fixedly connected with the piston pin (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628204.4U CN220566172U (en) | 2023-03-28 | 2023-03-28 | Auxiliary air integrated air pump of ignition type low-pressure in-cylinder direct injection engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628204.4U CN220566172U (en) | 2023-03-28 | 2023-03-28 | Auxiliary air integrated air pump of ignition type low-pressure in-cylinder direct injection engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220566172U true CN220566172U (en) | 2024-03-08 |
Family
ID=90088147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320628204.4U Active CN220566172U (en) | 2023-03-28 | 2023-03-28 | Auxiliary air integrated air pump of ignition type low-pressure in-cylinder direct injection engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220566172U (en) |
-
2023
- 2023-03-28 CN CN202320628204.4U patent/CN220566172U/en active Active
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