CN214007376U - Intake and exhaust system of engine for simulating plateau pressure - Google Patents
Intake and exhaust system of engine for simulating plateau pressure Download PDFInfo
- Publication number
- CN214007376U CN214007376U CN202022679741.0U CN202022679741U CN214007376U CN 214007376 U CN214007376 U CN 214007376U CN 202022679741 U CN202022679741 U CN 202022679741U CN 214007376 U CN214007376 U CN 214007376U
- Authority
- CN
- China
- Prior art keywords
- gas
- engine
- oil
- pipe
- liquid separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to the technical field of engines, and discloses an intake and exhaust system of an engine for simulating plateau pressure, which comprises an engine, an intake pipe, an exhaust pipe, a gas-liquid separator, an oil return pipe and an air suction pipe; the engine is communicated with the air inlet pipe and the exhaust pipe; the air outlet of the gas-liquid separator is communicated with the air inlet pipe; one end of the oil return pipe is communicated with an oil outlet of the gas-liquid separator, and the other end of the oil return pipe is communicated with an oil pan of the engine; one end of the air suction pipe is communicated with an air inlet of the gas-liquid separator, and the other end of the air suction pipe is communicated with an oil pan of the engine. During testing, gas enters the engine through the gas inlet pipe, part of gas mixed with engine oil in the oil pan flows to the gas inlet pipe through the crankcase, the gas flow of the oil pan flowing to the gas inlet pipe is increased due to the arrangement of the gas inlet pipe, the gas flow rate is reduced, the pressure difference between the crankcase and the gas inlet pipe is reduced, and the engine oil flowing into the gas inlet pipe is reduced; and gas-liquid separator can make machine oil return to the oil pan in from returning to oil pipe, has further guaranteed the machine oil liquid level of oil pan.
Description
Technical Field
The utility model belongs to the technical field of the technique of engine and specifically relates to a simulation plateau pressure engine advances exhaust system.
Background
In the process of an engine simulating a plateau environment advancing exhaust test, an air inlet pipeline and an exhaust pipeline of the engine realize the purpose of simulating the plateau through a Roots blower and a pressure control valve, and an oil pan is connected with the air inlet pipeline through a respirator to achieve a negative pressure state close to the pressure of an air inlet pipe.
However, due to the existence of the air leakage of the piston, the air pressure of the crankcase of the engine is still larger than the air pressure in the air inlet pipeline, the air flows from the oil pan to the air inlet pipeline, the air leakage is increased along with the increase of the load of the engine, liquid engine oil in the oil pan enters the air inlet pipeline along with the air from the breather, under the simulation of the plateau pressure of air inlet and exhaust, the flow rate of the air and the liquid in the pipeline is high, the air-liquid separator arranged in the breather pipeline cannot completely separate the engine oil and the air, a large amount of liquid engine oil still enters the air inlet pipeline, and the lubrication of the oil pan is insufficient, so that the combustion performance and the emission of the engine are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simulation plateau pressure engine advances exhaust system, above-mentioned simulation plateau pressure engine advances exhaust system can also reduce the machine oil flow direction intake pipe in the oil pan in a large number when can simulate plateau pressure to guarantee the machine oil liquid level of oil pan, guaranteed the lubricity of engine, improved the combustion performance of engine.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an intake and exhaust system of an engine simulating plateau pressure comprises the engine, an air inlet pipe, an exhaust pipe, a gas-liquid separator, an oil return pipe and an air suction pipe; wherein, an air inlet and an air outlet of the engine are respectively communicated with an air inlet pipe and an exhaust pipe; the air outlet of the gas-liquid separator is communicated with an air inlet pipe of the engine; one end of the oil return pipe is communicated with an oil outlet of the gas-liquid separator, and the other end of the oil return pipe is communicated with an oil pan of the engine; one end of the air suction pipe is communicated with an air inlet of the gas-liquid separator, and the other end of the air suction pipe is communicated with an oil pan of the engine.
The utility model provides a simulation plateau pressure engine advances exhaust system, when the experiment began, clean air after the simulation plateau pressure got into the engine by the intake pipe and mixes with the diesel oil mist that the engine sprays, is compressed and begins to burn in the cylinder, and because the existence of engine piston ring air leakage, the atmospheric pressure of crankcase will be greater than the atmospheric pressure in the intake pipe (simulated plateau pressure), and the gas that partly mixes machine oil in the oil pan can flow to the intake pipe through the crankcase; the two ends of the air suction pipe are respectively communicated with the oil pan and the gas-liquid separator, the gas-liquid separator is communicated with the air inlet pipe, the air suction pipe is also respectively communicated with the oil pan and the air inlet pipe, the sectional area of the air suction pipe is large enough to facilitate the circulation of enough air leakage amount of gas, and meanwhile, the sectional area of the circulating gas of the gas-liquid separator is several times that of the air suction pipe, so that the gas flow of a crankcase flowing to the air inlet pipe is met, the flow speed of the gas is reduced, the pressure difference between the crankcase and the air inlet pipe is further reduced, and the engine oil flowing into the air inlet pipe is reduced; in addition, when the gas mixed with the engine oil in the oil pan flows into the gas-liquid separator from the gas inlet of the gas-liquid separator, gas-liquid separation is carried out; the separated gas flows into an air inlet pipe from an air outlet of the gas-liquid separator and then flows into the engine to continuously participate in combustion; the separated engine oil flows into the oil return pipe from the oil outlet of the gas-liquid separator, so that the engine oil flows back to the oil pan, the amount of the engine oil flowing into the air inlet pipe is further reduced, the liquid level of the oil pan is ensured, and the lubricating effect of the engine is ensured.
This kind of mode of setting up can simulate plateau pressure simultaneously, can also reduce the machine oil flow direction intake pipe in the oil pan in a large number to guarantee the liquid level of oil pan, guaranteed the lubricated effect of engine.
Optionally, the oil return pipe is provided with a vacuum pump.
Optionally, the vacuum pump is arranged at one end of the oil return pipe close to the oil outlet of the gas-liquid separator.
Optionally, the oil outlet is provided at the bottom of the gas-liquid separator.
Optionally, the air inlet of the gas-liquid separator is arranged between the oil outlet and the air outlet.
Optionally, the gas-liquid separator comprises a condensing device; the condensing device is used for condensing the oil gas flowing into the gas-liquid separator into liquid engine oil.
Optionally, the gas-liquid separator comprises a screen; the filter screen is used for filtering the engine oil flowing into the gas-liquid separator.
Drawings
Fig. 1 is a schematic structural view of an intake and exhaust system of a simulated plateau pressure engine provided by an embodiment of the present invention.
Icon: 1-an engine; 2, an air inlet pipe; 3-an exhaust pipe; 4-a gas-liquid separator; 5-an oil return pipe; 6-air suction pipe; 7-an oil pan; 8-vacuum pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural view of an intake and exhaust system of a simulated plateau pressure engine provided by an embodiment of the present invention, referring to fig. 1, an intake and exhaust system of a simulated plateau pressure engine 1 provided by an embodiment of the present invention includes an engine 1, an intake pipe 2, an exhaust pipe 3, a gas-liquid separator 4, an oil return pipe 5 and an intake pipe 6; wherein, an air inlet and an air outlet of the engine 1 are respectively communicated with an air inlet pipe 2 and an exhaust pipe 3; the air outlet of the gas-liquid separator 4 is communicated with the air inlet pipe 2; one end of the oil return pipe 5 is communicated with an oil outlet of the gas-liquid separator 4, and the other end of the oil return pipe is communicated with an oil pan 7 of the engine 1; one end of the intake pipe 6 communicates with an intake port of the gas-liquid separator 4, and the other end communicates with an oil pan 7 of the engine 1.
In the intake and exhaust system for simulating the plateau pressure engine 1 provided by the embodiment, when a test is started, clean air enters the engine 1 through the intake pipe 2, is mixed with diesel oil mist sprayed by the engine and starts to burn when being compressed in a cylinder, and because the air pressure of a crankcase of the engine 1 is still larger than that of the intake pipe 2, part of gas mixed with engine oil in the oil pan 7 flows to the intake pipe 2 through the crankcase; because the two ends of the air suction pipe 6 are respectively communicated with the oil pan 7 and the gas-liquid separator 4, the gas-liquid separator 4 is communicated with the air inlet pipe 2, the air suction pipe 6 is also respectively communicated with the oil pan 7 and the air inlet pipe 2, the sectional area of the air suction pipe 6 is large enough to facilitate the circulation of enough air leakage, and the sectional area of the circulating gas of the gas-liquid separator 4 is several times of the sectional area of the air suction pipe 6, so that the gas flow of the crankcase flowing to the air inlet pipe 2 is met, the flow rate of the gas is reduced, the pressure difference between the crankcase and the air inlet pipe 2 is further reduced, and the engine oil flowing into the air inlet pipe 2 is reduced; in addition, when the gas mixed with the engine oil in the oil pan 7 flows into the gas-liquid separator 4 from the gas inlet of the gas-liquid separator 4, gas-liquid separation is performed; the separated gas flows into the air inlet pipe 2 from the air outlet of the gas-liquid separator 4 and then flows into the engine 1 to continuously participate in combustion; the separated engine oil flows into the oil return pipe 5 from the oil outlet of the gas-liquid separator 4, and then flows back to the oil pan 7, so that the amount of the engine oil flowing into the air inlet pipe 2 is further reduced, the oil level of the oil pan 7 is ensured, and the lubricating effect of the engine is ensured.
This kind of mode of setting can simulate plateau pressure, can also reduce the machine oil flow direction intake pipe 2 in the oil pan 7 in a large number to guarantee the liquid level of oil pan 7, guaranteed the lubricity of engine 1, improved the combustion performance of engine 1.
The engine 1 is communicated with the air inlet pipe 2 and the exhaust pipe 3 to simulate the plateau environment and can be controlled by the roots blower and the pressure control valve in a combined mode to achieve the plateau environment simulation.
It should be noted that the air intake pipe 6 with a larger pipe diameter should be selected as far as possible within the allowable range of the working conditions, so as to ensure that the flow rate of the gas is further reduced, the oil taken away by the high-speed gas flow is reduced, and the pressure difference between the oil pan 7 and the air intake pipe 2 is further reduced.
In addition, the gas-liquid separator 4 with a larger gas outlet is selected as far as possible within the range allowed by the working condition, so that the gas flow velocity flowing from the gas-liquid separator 4 to the gas inlet pipe 2 can be reduced, the gas-liquid separation efficiency is improved, and the engine oil flowing into the gas inlet pipe 2 is further reduced.
Referring to fig. 1, as an alternative embodiment, the return pipe 5 is provided with a vacuum pump 8. The vacuum pump 8 is arranged at one end of the oil return pipe 5 close to the oil outlet of the gas-liquid separator 4.
In the embodiment, after the gas mixed with the engine oil in the oil pan 7 flows into the gas-liquid separator 4 from the gas inlet of the gas-liquid separator 4, the gas-liquid separation is performed by opening; because the vacuum pump 8 is arranged at one end of the oil return pipe 5 close to the oil outlet of the gas-liquid separator 4, after the engine oil and the gas are separated, the vacuum pump 8 evacuates the air in the oil return pipe 5, and the engine oil is sucked into the oil return pipe 5 under the action of the gravity of the engine oil and the pressure difference between the oil return pipe 5 and the gas-liquid separator 4 and then is retained to the oil pan 7.
This kind of mode of setting up has further guaranteed that the machine oil after the gas-liquid separation can flow back to oil pan 7 to further ensure the machine oil liquid level of oil pan 7, guaranteed the lubricated effect of engine 1.
The height of the joint of the gas-liquid separator 4 and the air inlet pipe 2 is higher than that of the engine 1 as much as possible within a reasonable working condition range; since the oil itself has gravity, the higher the height of the gas-liquid separator 4, the smaller the amount of oil flowing from the oil pan 7 into the gas-liquid separator 4, and the oil can be further prevented from flowing from the oil pan 7 into the intake pipe 2, thereby further ensuring the lubricity of the oil pan 7.
As an alternative embodiment, the oil outlet is provided at the bottom of the gas-liquid separator 4. The air inlet of the gas-liquid separator 4 is arranged between the oil outlet and the air outlet.
In this embodiment, the oil outlet is disposed at the bottom of the gas-liquid separator 4, and the efficiency of the separated liquid engine oil flowing back to the oil return pipe 5 can be improved.
As an alternative embodiment, the gas-liquid separator 4 includes a condensing device; the condensing device is used for condensing the oil gas flowing into the gas-liquid separator 4 into liquid engine oil.
As an alternative embodiment, the gas-liquid separator 4 includes a sieve; the strainer is used to filter the engine oil flowing into the gas-liquid separator 4.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (7)
1. An intake and exhaust system of an engine simulating plateau pressure is characterized by comprising the engine, an air inlet pipe, an exhaust pipe, a gas-liquid separator, an oil return pipe and an air suction pipe; wherein the content of the first and second substances,
an air inlet and an air outlet of the engine are respectively communicated with the air inlet pipe and the exhaust pipe;
the air outlet of the gas-liquid separator is communicated with the air inlet pipe;
one end of the oil return pipe is communicated with an oil outlet of the gas-liquid separator, and the other end of the oil return pipe is communicated with an oil pan of the engine;
one end of the air suction pipe is communicated with an air inlet of the gas-liquid separator, and the other end of the air suction pipe is communicated with an oil pan of the engine.
2. The intake and exhaust system of a simulated high altitude pressure engine as claimed in claim 1, wherein the oil return pipe is provided with a vacuum pump.
3. The intake and exhaust system for the simulated plateau pressure engine as recited in claim 2, wherein the vacuum pump is disposed at one end of the oil return pipe close to the oil outlet of the gas-liquid separator.
4. The inlet and exhaust system for simulating a plateau pressure engine as recited in claim 1, wherein the oil outlet is provided at the bottom of the gas-liquid separator.
5. The inlet and exhaust system for the simulated plateau pressure engine as recited in claim 1, wherein an air inlet of the gas-liquid separator is disposed between the oil outlet and the air outlet.
6. The intake and exhaust system of a simulated high altitude pressure engine as claimed in any one of claims 1-5, wherein the gas-liquid separator comprises a condensing device;
the condensing device is used for condensing the oil gas flowing into the gas-liquid separator into liquid engine oil.
7. The inlet and exhaust system of a simulated high altitude pressure engine as claimed in claim 6 wherein the gas-liquid separator comprises a screen;
the filter screen is used for filtering the engine oil flowing into the gas-liquid separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022679741.0U CN214007376U (en) | 2020-11-18 | 2020-11-18 | Intake and exhaust system of engine for simulating plateau pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022679741.0U CN214007376U (en) | 2020-11-18 | 2020-11-18 | Intake and exhaust system of engine for simulating plateau pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214007376U true CN214007376U (en) | 2021-08-20 |
Family
ID=77305491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022679741.0U Active CN214007376U (en) | 2020-11-18 | 2020-11-18 | Intake and exhaust system of engine for simulating plateau pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214007376U (en) |
-
2020
- 2020-11-18 CN CN202022679741.0U patent/CN214007376U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102777232B (en) | For the Blowby flow control system of turbosupercharged engine | |
| CN112901309A (en) | Active two-stroke engine crankcase ventilation system | |
| CN205532781U (en) | Ventilation system of adjustable crankcase pressure | |
| CN112282895A (en) | Oil-gas separator, control method, electronic control unit and oil-gas separation system | |
| CN214007376U (en) | Intake and exhaust system of engine for simulating plateau pressure | |
| CN2646391Y (en) | Oil and gas separator | |
| CN104033210B (en) | PCV system for two cylinder engines | |
| CN104948262A (en) | Oil-gas separator | |
| CN111663981A (en) | Closed crankcase ventilation system for engine and vehicle | |
| CN109469531B (en) | Crankcase ventilation system oil and gas separator assembly and vehicle | |
| CN201963396U (en) | Four-stroke internal combustion engine for handheld tool | |
| CN205172671U (en) | Lubricating system of handheld four -stroke engine | |
| CN210195889U (en) | Positive pressure leading-in active crankcase blow-by gas system of reciprocating engine | |
| CN205013096U (en) | Pressure boost gasoline engine crankcase ventilation arrangement structure | |
| CN204024747U (en) | Engine lubrication system, motor and vehicle | |
| CN209469474U (en) | Oil-gas separating device of internal combustion engine | |
| CN211975106U (en) | Ventilation system of engine | |
| CN209212333U (en) | A kind of lubricating system of four-stroke engine | |
| CN204851377U (en) | Oil/gas separator | |
| CN202402161U (en) | Gasoline engine respiratory system without bearing structure | |
| CN208996790U (en) | Oil return apparatus | |
| TWM583485U (en) | Positive pressure and active crankcase ventilation system of reciprocating engine | |
| CN205669444U (en) | A kind of Gravity Separation formula low pressure EGR water trap | |
| CN2670612Y (en) | Small universal two-stroke gasoline engine | |
| CN2315301Y (en) | Negative pressure machine oil saving device for IC engine crank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |