CN114941557A - Engine connecting pipeline, control method and engine system - Google Patents
Engine connecting pipeline, control method and engine system Download PDFInfo
- Publication number
- CN114941557A CN114941557A CN202210497954.2A CN202210497954A CN114941557A CN 114941557 A CN114941557 A CN 114941557A CN 202210497954 A CN202210497954 A CN 202210497954A CN 114941557 A CN114941557 A CN 114941557A
- Authority
- CN
- China
- Prior art keywords
- pressure
- oil
- engine
- supercharger
- way valve
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 51
- 239000002912 waste gas Substances 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M2013/0038—Layout of crankcase breathing systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M2013/0038—Layout of crankcase breathing systems
- F01M2013/0044—Layout of crankcase breathing systems with one or more valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to the technical field of engines, and discloses an engine connecting pipeline, a control method and an engine system, wherein the method comprises the following steps: starting the engine; judging whether the difference between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than a limit value or not; if the difference value between the air inlet pressure and the atmospheric pressure is smaller than the limit value, controlling the waste gas flowing out of the oil-gas separator to flow back to a position between the mixer and the cylinder; and if the difference value between the air inlet pressure and the atmospheric pressure is greater than or equal to the limit value, controlling the exhaust gas flowing out of the oil-gas separator to directly flow into the supercharger. The setting mode can select to control the flow direction of the waste gas flowing out of the oil-gas separator according to the condition that whether the difference value between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than the limit value, thereby effectively preventing the waste gas in the crankcase from leaking.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine connecting pipeline, a control method and an engine system.
Background
The gas-oil separator is an important component in crankcase ventilation systems; when the engine works, after waste gas in the crankcase passes through the oil-gas separator, engine oil is separated from mixed gas and returns to the oil pan, and the waste gas returns to the air inlet pipe in front of the supercharger.
According to the existing natural gas engine, under some small-load working conditions of the engine, the pressure of a crankcase of the existing natural gas engine is equal to the air inlet pressure and is close to the atmospheric pressure, so that the oil-gas separator cannot smoothly separate the waste gas in the crankcase, the pressure of the waste gas in the crankcase is gradually increased, and when the pressure of the waste gas exceeds the atmospheric pressure, the risk of waste gas leakage exists.
Therefore, how to prevent the exhaust gas in the crankcase from leaking becomes a technical problem to be solved in the field.
Disclosure of Invention
The invention provides an engine connecting pipeline which can effectively prevent exhaust gas in a crankcase from leaking.
In order to achieve the purpose, the invention provides the following technical scheme:
an engine connecting line control method includes:
starting the engine;
judging whether the difference between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than a limit value or not;
if the difference value between the air inlet pressure and the atmospheric pressure is smaller than the limit value, controlling the waste gas flowing out of the oil-gas separator to flow back to a position between the mixer and the cylinder;
and if the difference value between the air inlet pressure and the atmospheric pressure is greater than or equal to the limit value, controlling the exhaust gas flowing out of the oil-gas separator to directly flow into the supercharger.
When the difference value between the air inlet pressure and the atmospheric pressure is greater than or equal to the limit value, the air inlet pressure is obviously less than the atmospheric pressure, and the exhaust gas flowing out of the oil-gas separator is controlled to directly flow into the supercharger.
When the difference value between the intake pressure and the atmospheric pressure is smaller than the limit value, which indicates that the intake pressure is close to the atmospheric pressure, the leakage risk is easy to occur, the exhaust gas flowing out of the oil-gas separator is made to flow back to a position between the mixer and the cylinder, the mixed air pressure is equal to the crankcase pressure, at the moment, the supercharger does not work because the intake pressure is close to the atmospheric pressure, and the air passes through the throttling action of the throttle valve, the mixer and other components, so that the air pressure behind the mixer is smaller than the atmospheric pressure, namely the crankcase pressure is smaller than the atmospheric pressure, the exhaust of the crankcase exhaust gas is facilitated, and the leakage of the exhaust gas is avoided.
Therefore, the arrangement mode can selectively control the flow direction of the exhaust gas flowing out of the oil-gas separator according to the judgment whether the difference value between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than the limit value, thereby effectively preventing the exhaust gas in the crankcase from leaking.
An engine connecting pipeline is suitable for the control method, and comprises a supercharger, a throttle valve, a mixer, an air cylinder, an oil-gas separator, an oil pan, a first one-way valve, a return pipeline and a second one-way valve; the first one-way valve is arranged on a pipeline between the oil-gas separator and the supercharger; one end of the return pipeline is positioned between the oil-gas separator and the first one-way valve, and the other end of the return pipeline is positioned between the mixer and the cylinder; the second check valve is arranged on the return line.
Optionally, the engine connecting pipeline further comprises a pressure sensor and an electronic control unit; the pressure sensor is used for detecting the pressure of the intake air flowing into the supercharger in real time; the electric control unit is in signal connection with the pressure sensor, the first one-way valve and the second one-way valve and is used for controlling the on-off of the first one-way valve and the second one-way valve according to the detected air inlet pressure by a control method.
Optionally, a pressure sensor is arranged on an air inlet pipeline of the supercharger, and/or a pressure sensor is arranged on an exhaust gas outlet of the oil-gas separator.
Optionally, the engine connecting line further comprises an air filter, an intercooler, a catalyst, and an EGR cooler.
An engine system comprising any one of the engine connecting lines described above.
Drawings
FIG. 1 is a schematic diagram of an engine connecting line according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method for an engine connection pipe according to an embodiment of the present invention.
Icon: 1-an air filter; 2-a supercharger; 3, an intercooler; 4-a throttle valve; 5-a mixer; 6-cylinder; 7-a catalyst; 8-an oil-gas separator; 9-a second one-way valve; 10-oil pan; 11-a first one-way valve; 12-an EGR cooler; 13-return line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for controlling the engine connecting pipeline provided by the embodiment of the invention comprises the following steps:
s100, starting an engine;
s200, judging whether the difference value between the air inlet pressure needing to flow into the supercharger and the atmospheric pressure is smaller than a limit value or not;
s300, if the difference value between the air inlet pressure and the atmospheric pressure is smaller than a limit value, controlling the waste gas flowing out of the oil-gas separator to flow back to a position between the mixer and the cylinder;
s400, if the difference value between the air inlet pressure and the atmospheric pressure is larger than or equal to the limit value, controlling the waste gas flowing out of the oil-gas separator to directly flow into the supercharger.
According to the control method of the engine connecting pipeline provided by the embodiment, when the difference value between the air inlet pressure and the atmospheric pressure is greater than or equal to the limit value, the air inlet pressure is obviously less than the atmospheric pressure, and the exhaust gas of the oil-gas separator is controlled to directly flow into the supercharger.
When the difference value between the intake pressure and the atmospheric pressure is smaller than the limit value, the intake pressure is close to the atmospheric pressure, leakage risks are easy to occur, the waste gas flowing out of the oil-gas separator flows back to a position between the mixer and the cylinder, the mixed air pressure is equal to the crankcase pressure, at the moment, the supercharger does not work due to the fact that the intake pressure is close to the atmospheric pressure, the air passes through the throttling effect of the throttle valve, the mixer and other components, the air pressure behind the mixer is smaller than the atmospheric pressure, namely the crankcase pressure is smaller than the atmospheric pressure, the crankcase waste gas is favorably discharged, and therefore the waste gas leakage is avoided.
Wherein the limit value is defined as: when the difference between the intake pressure and the atmospheric pressure is greater than or equal to the limit value, the intake pressure is obviously less than the atmospheric pressure, and the phenomenon of waste gas leakage cannot occur.
In addition, the limited value can be used for compensating zero offset of the differential pressure sensor, measurement error and atmospheric pressure fluctuation caused by factors such as environment and the like, and can be specifically set according to actual working conditions without limitation.
Therefore, the arrangement mode can selectively control the flow direction of the exhaust gas flowing out of the oil-gas separator according to the judgment whether the difference value between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than the limit value, thereby effectively preventing the exhaust gas in the crankcase from leaking.
Fig. 1 is a schematic structural diagram of an engine connecting pipeline provided in an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention further provides an engine connecting pipeline suitable for the control method, including a supercharger 2, a throttle 4, a mixer 5, a cylinder 6, an oil-gas separator 8, an oil pan 10, a first check valve 11, a return pipeline 13, and a second check valve 9; the first check valve 11 is arranged on a pipeline between the oil-gas separator 8 and the supercharger 2; one end of the return line 13 is positioned between the oil separator 8 and the first check valve 11, and the other end is positioned between the mixer 5 and the cylinder 6; the second non return valve 9 is arranged in the return line 13. The engine connecting pipeline also comprises a pressure sensor and an electric control unit; the pressure sensor is used for detecting the pressure of the intake air flowing into the supercharger 2 in real time; the electric control unit is in signal connection with the pressure sensor, the first one-way valve 11 and the second one-way valve 9, and is used for controlling the on-off of the first one-way valve 11 and the second one-way valve 9 according to the detected intake pressure by a control method.
Fig. 2 is a flowchart of a control method of an engine connection pipeline according to an embodiment of the present invention, and with reference to fig. 1 and fig. 2, specifically, the work flow is specifically described by combining the engine connection pipeline with the control method described above:
firstly, starting an engine;
then, comparing the difference value between the air inlet pressure and the atmospheric pressure with a limit value through an electric control unit;
if the difference value between the air inlet pressure and the atmospheric pressure is smaller than the limit value, the first check valve 11 is controlled to be closed, the second check valve 9 is controlled to be opened, and the waste gas flowing out of the oil-gas separator 8 flows back to a position between the mixer 5 and the cylinder 6 through the return pipeline 13;
if the difference between the intake pressure and the atmospheric pressure is greater than or equal to the limit value, the first check valve 11 is controlled to be opened, the second check valve 9 is controlled to be closed, and the exhaust gas flowing out of the oil-gas separator 8 directly flows into the supercharger 2.
As an alternative embodiment, a pressure sensor is provided in the intake line of the supercharger 2, and/or a pressure sensor is provided in the exhaust gas outlet of the air-oil separator 8.
In the embodiment, the exhaust gas outlet of the oil-gas separator 8 is communicated with the air inlet pipeline of the supercharger 2, so that the requirement can be met by arranging the pressure sensor at any position of the two; or two pressure sensors can be respectively arranged to ensure the detection accuracy.
With continued reference to fig. 1, as an alternative embodiment, the engine connection lines further comprise an air cleaner 1, an intercooler 3, a catalyst 7, an EGR cooler 12.
In this embodiment, the connection mode and the beneficial effect of the air cleaner 1, the intercooler 3, the catalyst 7 and the EGR cooler 12 are the same as those of the conventional mode and effect, and are not described again.
The embodiment of the invention also provides an engine system which comprises any one of the engine connecting pipelines.
In this embodiment, the beneficial effect of the engine system is the same as that of any one of the engine connecting pipelines described above, and is not described again.
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 (6)
1. An engine connecting line control method, characterized by comprising:
starting the engine;
judging whether the difference between the intake pressure required to flow into the supercharger and the atmospheric pressure is smaller than a limit value or not;
if the difference value between the air inlet pressure and the atmospheric pressure is smaller than the limit value, controlling the waste gas flowing out of the oil-gas separator to flow back to a position between the mixer and the cylinder;
and if the difference value between the air inlet pressure and the atmospheric pressure is greater than or equal to the limit value, controlling the exhaust gas flowing out of the oil-gas separator to directly flow into the supercharger.
2. An engine connecting pipeline is suitable for the control method according to claim 1, comprises a supercharger, a throttle valve, a mixer, a cylinder, an oil-gas separator and an oil pan, and is characterized by further comprising a first one-way valve, a return pipeline and a second one-way valve; wherein the content of the first and second substances,
the first one-way valve is arranged on a pipeline between the oil-gas separator and the supercharger;
one end of the return pipeline is positioned between the oil-gas separator and the first one-way valve, and the other end of the return pipeline is positioned between the mixer and the cylinder;
the second check valve is arranged on the return pipeline.
3. The engine connection line according to claim 2, further comprising a pressure sensor and an electronic control unit;
the pressure sensor is used for detecting the pressure of the intake air flowing into the supercharger in real time;
the electric control unit is in signal connection with the pressure sensor, the first one-way valve and the second one-way valve, and is used for controlling the on-off of the first one-way valve and the second one-way valve according to the detected intake pressure by the control method.
4. The engine connecting line according to claim 3, characterized in that the pressure sensor is arranged at an intake line of the supercharger and/or at an exhaust gas outlet of an oil separator.
5. The engine connection line of claim 2, further comprising an air cleaner, an intercooler, a catalyst, an Exhaust Gas Recirculation (EGR) cooler.
6. An engine system characterized by comprising the engine connection line according to any one of claims 2 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210497954.2A CN114941557A (en) | 2022-05-09 | 2022-05-09 | Engine connecting pipeline, control method and engine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210497954.2A CN114941557A (en) | 2022-05-09 | 2022-05-09 | Engine connecting pipeline, control method and engine system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114941557A true CN114941557A (en) | 2022-08-26 |
Family
ID=82906812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210497954.2A Pending CN114941557A (en) | 2022-05-09 | 2022-05-09 | Engine connecting pipeline, control method and engine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114941557A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082259A (en) * | 1999-09-09 | 2001-03-27 | Daihatsu Motor Co Ltd | Exhaust gas recycling control method for two cycle engine |
| CN101260819A (en) * | 2007-12-27 | 2008-09-10 | 奇瑞汽车股份有限公司 | Engine crankcase oil gas separation system and its oil gas separation method |
| CN202081932U (en) * | 2011-04-28 | 2011-12-21 | 长城汽车股份有限公司 | Pressure adjusting system of supercharged engine crankcase of automobile |
| CN204419299U (en) * | 2015-02-06 | 2015-06-24 | 上海汽车集团股份有限公司 | Crankcase ventilation system, Engine ECU, motor and automobile |
| WO2017109959A1 (en) * | 2015-12-25 | 2017-06-29 | 三菱重工業株式会社 | Engine with exhaust turbocharger |
| CN208236478U (en) * | 2018-05-11 | 2018-12-14 | 浙江吉利控股集团有限公司 | crankcase ventilation system and automobile with the crankcase ventilation system |
| CN211598788U (en) * | 2019-12-25 | 2020-09-29 | 潍柴动力股份有限公司 | Closed circulation ventilation system and have its engine |
| CN111997710A (en) * | 2020-08-15 | 2020-11-27 | 昆明云内动力股份有限公司 | Engine crankcase ventilation system and method |
| CN112901309A (en) * | 2021-02-05 | 2021-06-04 | 北京盛瑞科智能科技合伙企业(有限合伙) | Active two-stroke engine crankcase ventilation system |
-
2022
- 2022-05-09 CN CN202210497954.2A patent/CN114941557A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082259A (en) * | 1999-09-09 | 2001-03-27 | Daihatsu Motor Co Ltd | Exhaust gas recycling control method for two cycle engine |
| CN101260819A (en) * | 2007-12-27 | 2008-09-10 | 奇瑞汽车股份有限公司 | Engine crankcase oil gas separation system and its oil gas separation method |
| CN202081932U (en) * | 2011-04-28 | 2011-12-21 | 长城汽车股份有限公司 | Pressure adjusting system of supercharged engine crankcase of automobile |
| CN204419299U (en) * | 2015-02-06 | 2015-06-24 | 上海汽车集团股份有限公司 | Crankcase ventilation system, Engine ECU, motor and automobile |
| WO2017109959A1 (en) * | 2015-12-25 | 2017-06-29 | 三菱重工業株式会社 | Engine with exhaust turbocharger |
| CN208236478U (en) * | 2018-05-11 | 2018-12-14 | 浙江吉利控股集团有限公司 | crankcase ventilation system and automobile with the crankcase ventilation system |
| CN211598788U (en) * | 2019-12-25 | 2020-09-29 | 潍柴动力股份有限公司 | Closed circulation ventilation system and have its engine |
| CN111997710A (en) * | 2020-08-15 | 2020-11-27 | 昆明云内动力股份有限公司 | Engine crankcase ventilation system and method |
| CN112901309A (en) * | 2021-02-05 | 2021-06-04 | 北京盛瑞科智能科技合伙企业(有限合伙) | Active two-stroke engine crankcase ventilation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10907591B2 (en) | Internal combustion engine and method for detecting a leak from a crankcase and/or a tank ventilation system | |
| CN102782294B (en) | Control device for internal combustion engine | |
| CN107420230B (en) | Carbon tank high-load desorption pipeline desorption flow diagnosis method | |
| US7469691B2 (en) | Exhaust gas recirculation cooler bypass | |
| US20110197864A1 (en) | Internal combustion engine and method for monitoring a tank ventilation system and a crankcase ventilation system | |
| JP4380754B2 (en) | Exhaust gas recirculation device for internal combustion engine | |
| CN110671238B (en) | EGR waste gas flow measuring method and EGR system of gas engine | |
| CN109441671B (en) | Diagnosis system and method for low-desorption pipeline of engine | |
| CN101581263A (en) | Intake manifold configuration and automobile internal combustion engine with the same | |
| WO2024060689A1 (en) | Method and device for detecting air leak of engine air intake pipe | |
| CN113250864B (en) | EGR flow diagnosis method and system and automobile | |
| US20100095670A1 (en) | Method and device for regulating or controlling a compressor of an exhaust-gas turbocharger | |
| US20200256223A1 (en) | Abnormality determination device of internal combustion engine | |
| CN114941557A (en) | Engine connecting pipeline, control method and engine system | |
| EP2546506A1 (en) | Controller for internal combustion engine | |
| CN111550336B (en) | Abnormality determination device for internal combustion engine | |
| CN111852653B (en) | Diagnostic device and diagnostic method for crankcase ventilation pipeline | |
| CN110869595B (en) | Engine system and exhaust gas recirculation flow measurement and emission control method therein | |
| CN110857636A (en) | Engine system and method for detecting intake abnormality of engine | |
| CN113107673B (en) | Pipeline disconnection diagnosis method and device and electronic equipment | |
| CN114320526A (en) | Crankcase ventilation system and air leakage diagnosis method thereof | |
| JPS59192858A (en) | Canister purge controlling apparatus | |
| US10619601B2 (en) | Exhaust gas recirculation arrangement | |
| CN113187582B (en) | Method for preventing engine breather from oil channeling under plateau working conditions | |
| CN214063099U (en) | Positive crankcase ventilation system, engine and car |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220826 |
|
| RJ01 | Rejection of invention patent application after publication |