CN112282894A - Control method, device and system for maintaining negative pressure of crankcase - Google Patents
Control method, device and system for maintaining negative pressure of crankcase Download PDFInfo
- Publication number
- CN112282894A CN112282894A CN202011017763.9A CN202011017763A CN112282894A CN 112282894 A CN112282894 A CN 112282894A CN 202011017763 A CN202011017763 A CN 202011017763A CN 112282894 A CN112282894 A CN 112282894A
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- crankcase
- pressure value
- vacuum pump
- current
- rotating speed
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- 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
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
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- 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
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of vehicles, and particularly relates to a control method, a device and a system for maintaining negative pressure of a crankcase. The control method for maintaining the negative pressure of the crankcase comprises the following steps: acquiring a current pressure value of a crankcase and a current rotating speed of an engine; controlling a vacuum pump communicated with the crankcase to be started according to the fact that the current pressure value of the crankcase is larger than a first preset pressure value; the vacuum pump is in an open state, the calibrated rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, and the vacuum pump is controlled to rotate according to the calibrated rotating speed of the vacuum pump. According to the control method for keeping the negative pressure of the crankcase, the vacuum pump communicated with the crankcase is controlled to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; the pressure of the crankcase is negative pressure by pumping air through the vacuum pump, the pressure of the crankcase is ensured to be negative pressure, oil return of the supercharger can be ensured to be smooth, and oil leakage of the supercharger is avoided.
Description
Technical Field
The invention belongs to the technical field of vehicles, and particularly relates to a control method, a device and a system for maintaining negative pressure of a crankcase.
Background
The existing crankcase ventilation structure has no link of air exhaust of a vacuum pump, and for closed circulation, crankcase gas is filtered by an oil-gas separator and then directly enters an air inlet system.
For a sequential supercharged engine, a plurality of superchargers can work according to different working conditions, for a non-working supercharger, if the pressure of a crankcase is a positive value, the supercharger returns oil to the crankcase, and due to the existence of the pressure, the oil return can be unsmooth, so that the oil leakage of the superchargers can be caused.
In summary, in the conventional crankcase ventilation structure, if the crankcase pressure is positive, the oil return is not smooth.
Disclosure of Invention
The invention aims to at least solve the problem that in the existing crankcase ventilation structure, oil return is not smooth if the crankcase pressure is a positive value. The purpose is realized by the following technical scheme:
the invention provides a control method for maintaining negative pressure of a crankcase in a first aspect, wherein the control method comprises the following steps:
acquiring a current pressure value of a crankcase and a current rotating speed of an engine;
controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and the vacuum pump is in an open state, the calibrated rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, and the vacuum pump is controlled to rotate according to the calibrated rotating speed of the vacuum pump.
According to the control method for maintaining the negative pressure of the crankcase, the vacuum pump communicated with the crankcase is controlled to be started according to the fact that the current pressure value of the crankcase is larger than a first preset pressure value; the vacuum pump is in an open state, the calibration rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, the vacuum pump is controlled to rotate according to the calibration rotating speed of the vacuum pump, the vacuum pump is used for pumping air to enable the pressure of the crankcase to be negative pressure, the pressure of the crankcase is ensured to be negative pressure, oil return of the supercharger can be guaranteed to be smooth, and oil leakage of the supercharger is avoided.
In addition, the control method for maintaining the negative pressure of the crankcase according to the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, said obtaining a calibrated speed of the vacuum pump based on a current speed of said engine comprises:
and obtaining the air leakage of the engine in a table look-up mode according to the current rotating speed of the engine, and obtaining the calibrated rotating speed of the vacuum pump in a table look-up mode according to the air leakage and the current pressure value of the crankcase.
In some embodiments of the present invention, after controlling a vacuum pump communicated with a crankcase to rotate at a calibrated rotation speed of the vacuum pump according to that a current pressure value of the crankcase is greater than a first preset pressure value, the method further includes:
obtaining the current pressure value of the crankcase again;
controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is outside the first preset pressure value and the second preset pressure value;
wherein the first preset pressure value is greater than the second preset pressure value.
In some embodiments of the present invention, the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotation speed of the vacuum pump to increase until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is greater than the first preset pressure value.
In some embodiments of the present invention, the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotating speed of the vacuum pump to be reduced until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is smaller than the second preset pressure value.
In some embodiments of the invention, the controlling the turning on of a vacuum pump in communication with the crankcase comprises:
and controlling the opening of a vacuum pump communicated with the crankcase through the oil-gas separator.
Another aspect of the present invention also provides a control device for maintaining a negative crankcase pressure, which is used for executing the control method for maintaining the negative crankcase pressure, wherein the control device comprises: an acquisition unit and a vacuum pump control unit, wherein:
the acquisition unit is used for acquiring the current pressure value of the crankcase and the current rotating speed of the engine;
the vacuum pump control unit is used for controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and obtaining the calibrated rotating speed of the vacuum pump according to the current rotating speed of the engine, and controlling the vacuum pump to rotate according to the calibrated rotating speed of the vacuum pump.
The invention also provides a control system for maintaining the negative pressure of the crankcase, which comprises a memory and the control device for maintaining the negative pressure of the crankcase, wherein the memory stores instructions of the control method for maintaining the negative pressure of the crankcase;
the control system for maintaining the negative crankcase pressure further comprises: a crankcase;
a pressure sensor for measuring a current pressure value of the crankcase;
and the vacuum pump is communicated with the air outlet of the crankcase.
In some embodiments of the invention, the control system for maintaining the negative pressure in the crankcase further comprises an air-oil separator, and the vacuum pump is communicated with the air outlet of the crankcase through the air-oil separator.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically illustrates a flow chart of a control method of maintaining a negative crankcase pressure according to an embodiment of the invention;
fig. 2 schematically shows a structural schematic diagram of a control system for maintaining a negative crankcase pressure according to an embodiment of the invention.
1: a crankcase; 2: an oil-gas separator; 3: a vacuum pump; 4: a motor; 5: a pressure sensor; 6: and (4) an air filter.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, the control method for maintaining the negative pressure in the crankcase in the present embodiment includes the following steps:
s1, acquiring the current pressure value of the crankcase and the current rotating speed of the engine;
s2, controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and the vacuum pump is in an open state, the calibrated rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, and the vacuum pump is controlled to rotate according to the calibrated rotating speed of the vacuum pump.
Specifically, the first preset pressure value is 0, and the pressure in the crankcase needs to be controlled to be 0 or less. The pressure of the crankcase is negative pressure by pumping air through the vacuum pump, the pressure of the crankcase is ensured to be negative pressure, oil return of the supercharger can be ensured to be smooth, and oil leakage of the supercharger is avoided.
In some embodiments of the present invention, the obtaining the calibrated speed of the vacuum pump according to the current speed of the engine and the current pressure value of the crankcase comprises:
and obtaining the air leakage of the engine in a table look-up mode according to the current rotating speed of the engine, and obtaining the calibrated rotating speed of the vacuum pump in a table look-up mode according to the air leakage and the current pressure value of the crankcase.
Specifically, the test measures that the corresponding pressure value of the crankcase corresponding to a certain rotating speed of the engine, for example, at a rotating speed of 1000r/min, the corresponding pressure value of the crankcase is 1Kpa, the air leakage of the engine is aKpa, at this time, the vacuum pump needs to be started to control the pressure in the crankcase to be below 0Kpa, the rotating speed of the vacuum pump controlling the pressure in the crankcase to be below 0Kpa can be used as the calibrated rotating speed of the vacuum pump, and the corresponding pressure value of the crankcase corresponding to a certain rotating speed of the engine, the air leakage of the engine and the calibrated rotating speed of the vacuum pump, which are obtained through the test, are tabulated and stored.
In some embodiments of the present invention, after controlling a vacuum pump communicated with a crankcase to rotate at a calibrated rotation speed of the vacuum pump according to that a current pressure value of the crankcase is greater than a first preset pressure value, the method further includes:
obtaining the current pressure value of the crankcase again;
controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is outside the first preset pressure value and the second preset pressure value;
wherein the first preset pressure value is greater than the second preset pressure value.
And when the vacuum pump rotates according to the calibrated rotating speed of the vacuum pump and the pressure of the crankcase does not reach negative pressure or is too low, correcting the pressure. If the current pressure in the crankcase is required to be-2 Kpa to 0Kpa, when the current pressure in the crankcase is less than-2 Kpa or greater than 0Kpa, the rotating speed of the vacuum pump needs to be reduced or increased, and the pressure is corrected.
In some embodiments of the present invention, the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotation speed of the vacuum pump to increase until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is greater than the first preset pressure value.
Specifically, when the current pressure in the crankcase measured by the pressure sensor is higher than 0Kpa, the ECU controls the vacuum pump to increase the rotating speed and increase the air extraction rate, so that the current pressure in the crankcase is extracted to negative pressure.
In some embodiments of the present invention, the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotating speed of the vacuum pump to be reduced until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is smaller than the second preset pressure value.
Specifically, when the pressure sensor detects that the current pressure in the crankcase is lower than-2 Kpa, the ECU controls the vacuum pump to reduce the rotating speed and reduce the air suction rate until the current pressure in the crankcase is pumped to-2 Kpa.
In some embodiments of the invention, the controlling the turning on of a vacuum pump in communication with the crankcase comprises:
and controlling the opening of a vacuum pump communicated with the crankcase through the oil-gas separator.
In order to prevent the oil in the crankcase from being too much, the vacuum pump is communicated with the air outlet of the oil-gas separator, the air inlet of the oil-gas separator is communicated with the air outlet of the crankcase, and the oil pumped into the crankcase can be avoided through the oil-gas separator.
Another aspect of the present invention also provides a control device for maintaining a negative crankcase pressure, which is used for executing the control method for maintaining the negative crankcase pressure, wherein the control device comprises: an acquisition unit and a vacuum pump control unit, wherein:
the acquisition unit is used for acquiring the current pressure value of the crankcase and the current rotating speed of the engine;
the vacuum pump control unit is used for controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and obtaining the calibrated rotating speed of the vacuum pump according to the current rotating speed of the engine, and controlling the vacuum pump to rotate according to the calibrated rotating speed of the vacuum pump.
As shown in fig. 2, another aspect of the present invention further provides a control system for maintaining a negative crankcase pressure, the control system for maintaining a negative crankcase pressure comprises a memory and the control device for maintaining a negative crankcase pressure, wherein the memory stores instructions of the control method for maintaining a negative crankcase pressure;
the control system for maintaining the negative crankcase pressure further comprises: a crankcase 1;
a pressure sensor 5, the pressure sensor 5 being configured to measure a current pressure value of the crankcase 1;
and the vacuum pump 3 is communicated with the air outlet of the crankcase 1.
The ECU controller controls the motor 4 of the vacuum pump 3 to increase the rotation speed or decrease the rotation speed according to the signal of the pressure sensor 5, thereby adjusting the rotation speed of the vacuum pump 3.
In some embodiments of the present invention, the control system for maintaining the negative pressure of the crankcase further comprises an air-oil separator 2, and the vacuum pump 3 is communicated with the air outlet of the crankcase 1 through the air-oil separator 2. The air outlet of the vacuum pump 3 is connected with an air filter 6.
In the control method for keeping the negative pressure of the crankcase, the vacuum pump can pump air to the crankcase, so that the pressure in the crankcase is ensured to be a negative value, and the set rotating speed of the vacuum pump is obtained by the rotating speed based on the working condition of the engine and the current pressure in the crankcase. The rotating speed of the vacuum pump is calibrated according to the crankcase pressure of the engine under different working conditions, (for example, the crankcase pressure under certain engine rotating speed is measured according to a test, the crankcase pressure needs to be pumped to negative pressure at the moment, the rotating speed of the vacuum pump is obtained, the rotating speed of the vacuum pump is used as the calibrated rotating speed of the vacuum pump), the pressure signal is transmitted to the ECU by the crankcase pressure sensor, when the pressure does not reach the negative pressure under the calibrated rotating speed of the vacuum pump, and correcting the pressure, (when the pressure of the crankcase measured by a crankcase pressure sensor is higher than 0Kpa, the ECU controls the vacuum pump to increase the rotating speed and increase the air extraction rate until the pressure of the crankcase is pumped to negative pressure, and when the pressure of the crankcase measured by the pressure sensor is lower than-2 Kpa, the ECU controls the vacuum pump to decrease the rotating speed and decrease the air extraction rate to stabilize the pressure of the crankcase in a range of-2 Kpa to 0Kpa so as to form closed-loop control) adjusting the rotating speed of the vacuum pump to enable the pressure of the crankcase to reach a preset pressure range.
In summary, in the control method for maintaining the negative pressure of the crankcase of the present invention, the vacuum pump communicated with the crankcase is controlled to be turned on according to the fact that the current pressure value of the crankcase is greater than the first preset pressure value; the vacuum pump is in an open state, the calibration rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, the vacuum pump is controlled to rotate according to the calibration rotating speed of the vacuum pump, the vacuum pump is used for pumping air to enable the pressure of the crankcase to be negative pressure, the pressure of the crankcase is ensured to be negative pressure, oil return of the supercharger can be guaranteed to be smooth, and oil leakage of the supercharger is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A control method for maintaining negative pressure of a crankcase is characterized by comprising the following steps:
acquiring a current pressure value of a crankcase and a current rotating speed of an engine;
controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and the vacuum pump is in an open state, the calibrated rotating speed of the vacuum pump is obtained according to the current rotating speed of the engine, and the vacuum pump is controlled to rotate according to the calibrated rotating speed of the vacuum pump.
2. The control method for maintaining negative crankcase pressure as recited in claim 1, wherein obtaining the calibrated rotational speed of the vacuum pump based on the current rotational speed of the engine comprises:
and obtaining the air leakage of the engine in a table look-up mode according to the current rotating speed of the engine, and obtaining the calibrated rotating speed of the vacuum pump in a table look-up mode according to the air leakage and the current pressure value of the crankcase.
3. The control method for maintaining negative pressure in the crankcase according to claim 1, wherein the step of controlling the vacuum pump communicated with the crankcase to rotate according to the calibrated rotation speed of the vacuum pump after the current pressure value of the crankcase is greater than the first preset pressure value further comprises:
obtaining the current pressure value of the crankcase again;
controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is outside the first preset pressure value and the second preset pressure value;
wherein the first preset pressure value is greater than the second preset pressure value.
4. The method of claim 3, wherein the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotation speed of the vacuum pump to increase until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is greater than the first preset pressure value.
5. The method of claim 3, wherein the controlling the rotation speed of the vacuum pump until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the current pressure value of the crankcase being outside the first preset pressure value and the second preset pressure value comprises:
and controlling the rotating speed of the vacuum pump to be reduced until the current pressure value of the crankcase is within the first preset pressure value and the second preset pressure value according to the fact that the current pressure value of the crankcase is smaller than the second preset pressure value.
6. The control method for maintaining negative crankcase pressure as claimed in claim 1, wherein the controlling the opening of a vacuum pump communicating with the crankcase comprises:
and controlling the opening of a vacuum pump communicated with the crankcase through the oil-gas separator.
7. A control device for maintaining a negative crankcase pressure for performing the control method for maintaining a negative crankcase pressure according to claim 1, comprising: an acquisition unit and a vacuum pump control unit, wherein:
the acquisition unit is used for acquiring the current pressure value of the crankcase and the current rotating speed of the engine;
the vacuum pump control unit is used for controlling a vacuum pump communicated with the crankcase to be started according to the condition that the current pressure value of the crankcase is greater than a first preset pressure value; and obtaining the calibrated rotating speed of the vacuum pump according to the current rotating speed of the engine, and controlling the vacuum pump to rotate according to the calibrated rotating speed of the vacuum pump.
8. A control system for maintaining a negative crankcase pressure, comprising a memory and the control device for maintaining a negative crankcase pressure according to claim 7, wherein the memory stores instructions of the control method for maintaining a negative crankcase pressure according to any one of claims 1 to 6;
the control system for maintaining the negative crankcase pressure further comprises: a crankcase;
a pressure sensor for measuring a current pressure value of the crankcase;
and the vacuum pump is communicated with the air outlet of the crankcase.
9. The control system for maintaining negative crankcase pressure of claim 8, further comprising an air-oil separator, wherein the vacuum pump is in communication with the air outlet of the crankcase via the air-oil separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011017763.9A CN112282894B (en) | 2020-09-24 | 2020-09-24 | Control method, device and system for maintaining negative pressure of crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011017763.9A CN112282894B (en) | 2020-09-24 | 2020-09-24 | Control method, device and system for maintaining negative pressure of crankcase |
Publications (2)
| Publication Number | Publication Date |
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| CN112282894A true CN112282894A (en) | 2021-01-29 |
| CN112282894B CN112282894B (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011017763.9A Active CN112282894B (en) | 2020-09-24 | 2020-09-24 | Control method, device and system for maintaining negative pressure of crankcase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013118A (en) * | 2022-06-21 | 2022-09-06 | 中国第一汽车股份有限公司 | Crankcase pressure control method and device, vehicle and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040112346A1 (en) * | 2001-03-07 | 2004-06-17 | Stephan Ahlborn | Device for the ventilation of the crankcase of an internal combustion engine |
| CN107882613A (en) * | 2017-12-05 | 2018-04-06 | 广西玉柴机器股份有限公司 | Reduce the device of engine motor oil consumption and particulate emission |
| CN207261076U (en) * | 2017-08-31 | 2018-04-20 | 宝沃汽车（中国）有限公司 | Crankcase ventilation system and vehicle |
| CN109072738A (en) * | 2016-04-14 | 2018-12-21 | 马勒国际有限公司 | Method for controlling the pressure in crankcase |
-
2020
- 2020-09-24 CN CN202011017763.9A patent/CN112282894B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040112346A1 (en) * | 2001-03-07 | 2004-06-17 | Stephan Ahlborn | Device for the ventilation of the crankcase of an internal combustion engine |
| CN109072738A (en) * | 2016-04-14 | 2018-12-21 | 马勒国际有限公司 | Method for controlling the pressure in crankcase |
| CN207261076U (en) * | 2017-08-31 | 2018-04-20 | 宝沃汽车（中国）有限公司 | Crankcase ventilation system and vehicle |
| CN107882613A (en) * | 2017-12-05 | 2018-04-06 | 广西玉柴机器股份有限公司 | Reduce the device of engine motor oil consumption and particulate emission |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013118A (en) * | 2022-06-21 | 2022-09-06 | 中国第一汽车股份有限公司 | Crankcase pressure control method and device, vehicle and electronic device |
| CN115013118B (en) * | 2022-06-21 | 2024-01-05 | 中国第一汽车股份有限公司 | Crankcase pressure control method and device, vehicle and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112282894B (en) | 2021-12-21 |
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