CN-121993277-A - Method for separating engine oil from gas, related device and internal combustion engine

CN121993277ACN 121993277 ACN121993277 ACN 121993277ACN-121993277-A

Abstract

The application discloses an engine oil-gas separation method, a related device and an internal combustion engine, which relate to the field of internal combustion engines, and the severity of gas leakage is determined according to the gas leakage of a piston of the internal combustion engine, and determining the operation state of the first oil-gas separator according to the operation parameters of the first oil-gas separator arranged at the air taking port of the cylinder cover of the internal combustion engine. And further, whether to start the second oil-gas separator arranged at the crankcase gas taking port of the internal combustion engine to operate is determined according to the severity of the gas leakage and the operation state of the first oil-gas separator. The intervention of the second oil-gas separator is controlled by monitoring the running state of the first oil-gas separator in real time and judging the severity of piston leakage, so that at least one normal oil-gas separator is ensured to work, the effect that the internal combustion engine can still maintain oil-gas separation even if the main oil-gas separator is invalid is achieved, the shutdown or serious damage caused by the failure of the oil-gas separator is avoided, and the running reliability and safety of the internal combustion engine are improved.

Inventors

LUO CHANGZENG
ZENG XIAOXIAO
ZHANG PINGZE
WEI DONGBO
WANG DECHENG
LI XUCONG

Assignees

潍柴动力股份有限公司
南京航空航天大学

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. A method for separating engine oil from gas, comprising: determining the severity of air leakage according to the air leakage of a piston of the internal combustion engine, and determining the operation state of a first oil-gas separator according to the operation parameters of the first oil-gas separator; And determining whether to start a second oil-gas separator to operate according to the severity of the air leakage and the operation state, wherein the first oil-gas separator is arranged at an air taking port of a cylinder cover of the internal combustion engine, and the second oil-gas separator is arranged at an air taking port of a crankcase of the internal combustion engine.
2. The engine oil-gas separation method according to claim 1, wherein said determining whether to start the second oil-gas separator operation based on the blow-by severity and the operation state includes: If the severity of the air leakage is a first level and the running state indicates that the first oil-gas separator is in a normal state, the second oil-gas separator is not started, or, And if the severity of the air leakage is a second level and the running state represents that the first oil-gas separator is in an abnormal state, the second oil-gas separator is not started, and the severity of the air leakage represented by the second level is higher than that of the air leakage represented by the first level.
3. The engine oil-gas separation method according to claim 2, wherein said determining whether to start the second oil-gas separator operation according to the blow-by severity and the operation state further comprises: And if the severity of the air leakage is a second level and the running state represents that the first oil-gas separator is in the abnormal state, starting the second oil-gas separator.
4. A method of separating engine oil from gas according to any one of claims 1 to 3, wherein said determining the severity of the blow-by from the piston blow-by of the internal combustion engine comprises: If the pressure value of the crankcase representing the air leakage of the piston is smaller than an air leakage threshold value, determining the severity of the air leakage as a first level; And if the pressure value of the crankcase which represents the air leakage quantity of the piston is not smaller than the air leakage threshold value, determining that the severity degree of the air leakage is a second grade.
5. A method of separating engine oil from gas according to any one of claims 1 to 3, wherein the determining the operating state of the first gas-oil separator based on the operating parameter of the first gas-oil separator comprises: and determining the running state of the first oil-gas separator according to the oil mist concentration and the oil mass liquid level in the air outlet pipeline of the first oil-gas separator.
6. The method of claim 5, wherein determining the operating state of the first oil separator based on the oil mist concentration and the oil level in the outlet pipe of the first oil separator comprises: if the oil mist concentration exceeds a concentration threshold value and the duration of the oil mist concentration exceeding the concentration threshold value is not less than a duration threshold value or the oil level is not less than a liquid level threshold value, determining that the first oil-gas separator is operated in an abnormal state; If the oil mist concentration exceeds the concentration threshold value, the duration of the oil mist concentration exceeding the concentration threshold value is lower than the duration threshold value, and the oil mass liquid level is lower than the liquid level threshold value, determining that the first oil-gas separator is operated in a normal state; and if the oil mist concentration does not exceed the concentration threshold value and the oil mass liquid level is lower than the liquid level threshold value, determining that the first oil-gas separator is operated in the normal state.
7. An oil-gas separation device for an internal combustion engine, comprising: an operation condition determining module for determining the severity of the air leakage according to the air leakage of the piston of the internal combustion engine, and determining the operation state of the first oil-gas separator according to the operation parameters of the first oil-gas separator, and The oil-gas separation control module is used for determining whether to start a second oil-gas separator to operate according to the severity degree of the air leakage and the operation state, wherein the first oil-gas separator is arranged at an air taking port of a cylinder cover of the internal combustion engine, and the second oil-gas separator is arranged at an air taking port of a crankcase of the internal combustion engine.
8. An electronic device comprising at least one processor and a memory coupled to the processor, wherein: the memory is used for storing a computer program; the processor is configured to execute the computer program to enable the electronic device to implement the internal combustion engine oil-gas separation method according to any one of claims 1 to 6.
9. A computer storage medium carrying one or more computer programs which, when executed by an electronic device, enable the electronic device to carry out the internal combustion engine oil-gas separation method of any one of claims 1 to 6.
10. An internal combustion engine is characterized by comprising the electronic equipment as set forth in claim 8, and a first oil-gas separator and a second oil-gas separator which are respectively connected with the electronic equipment, wherein the first oil-gas separator is arranged at a cylinder cover air taking port of the internal combustion engine, and the second oil-gas separator is arranged at a crankcase air taking port of the internal combustion engine.

Description

Method for separating engine oil from gas, related device and internal combustion engine Technical Field The application relates to the technical field of internal combustion engines, in particular to an internal combustion engine oil-gas separation method, a related device and an internal combustion engine. Background The oil-gas separation is an important treatment process in a positive crankcase ventilation system of an internal combustion engine (such as a gasoline engine, a hydrogen engine, a methanol engine and the like), and mainly comprises the steps of effectively separating lubricating oil fogdrops and waste gas in mixed gas formed by combustion leakage, engine oil evaporation and blowby gas in the internal combustion engine, recycling an engine oil guiding oil sump which is separated, guiding purified gas to an air inlet system for re-combustion, thereby realizing energy conservation and emission reduction, preventing engine oil consumption abnormality and avoiding direct discharge of harmful gas into the atmosphere. Therefore, how to effectively maintain the oil-gas separation effect of the internal combustion engine is a problem that needs to be solved by those skilled in the art. Disclosure of Invention In view of the above problems, the application provides an engine oil-gas separation method, a related device and an internal combustion engine, so as to achieve the purposes of improving the oil-gas separation effect and improving the reliability of the internal combustion engine. The specific scheme is as follows: The first aspect of the present application provides an engine oil-gas separation method comprising: determining the severity of air leakage according to the air leakage of a piston of the internal combustion engine, and determining the operation state of a first oil-gas separator according to the operation parameters of the first oil-gas separator; And determining whether to start a second oil-gas separator to operate according to the severity of the air leakage and the operation state, wherein the first oil-gas separator is arranged at an air taking port of a cylinder cover of the internal combustion engine, and the second oil-gas separator is arranged at an air taking port of a crankcase of the internal combustion engine. In one possible implementation, the determining whether to start the second oil separator according to the severity of the air leakage and the operation state includes: If the severity of the air leakage is a first level and the running state indicates that the first oil-gas separator is in a normal state, the second oil-gas separator is not started, or, And if the severity of the air leakage is a second level and the running state represents that the first oil-gas separator is in an abnormal state, the second oil-gas separator is not started, and the severity of the air leakage represented by the second level is higher than that of the air leakage represented by the first level. In one possible implementation, the determining whether to start the second oil-gas separator according to the severity of the air leakage and the operation state further includes: And if the severity of the air leakage is a second level and the running state represents that the first oil-gas separator is in the abnormal state, starting the second oil-gas separator. In one possible implementation, the determining the severity of the air leakage according to the air leakage of the piston of the internal combustion engine includes: If the pressure value of the crankcase representing the air leakage of the piston is smaller than an air leakage threshold value, determining the severity of the air leakage as a first level; And if the pressure value of the crankcase which represents the air leakage quantity of the piston is not smaller than the air leakage threshold value, determining that the severity degree of the air leakage is a second grade. In one possible implementation, the determining the operation state of the first oil-gas separator according to the operation parameter of the first oil-gas separator includes: and determining the running state of the first oil-gas separator according to the oil mist concentration and the oil mass liquid level in the air outlet pipeline of the first oil-gas separator. In one possible implementation, the determining the operation state of the first oil-gas separator according to the oil mist concentration and the oil level in the air outlet pipeline of the first oil-gas separator includes: if the oil mist concentration exceeds a concentration threshold value and the duration of the oil mist concentration exceeding the concentration threshold value is not less than a duration threshold value or the oil level is not less than a liquid level threshold value, determining that the first oil-gas separator is operated in an abnormal state; If the oil mist concentration exceeds the concentration threshold value, the duration of the oil mist concentration exce