CN114060500A - Automatic lubricating oil regulation and control system and method for DCT (dual clutch transmission) - Google Patents
Automatic lubricating oil regulation and control system and method for DCT (dual clutch transmission) Download PDFInfo
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- CN114060500A CN114060500A CN202111467960.5A CN202111467960A CN114060500A CN 114060500 A CN114060500 A CN 114060500A CN 202111467960 A CN202111467960 A CN 202111467960A CN 114060500 A CN114060500 A CN 114060500A
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- temperature
- lubricating oil
- cavity
- clutch
- transmission
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 48
- 230000005540 biological transmission Effects 0.000 title claims abstract description 44
- 230000033228 biological regulation Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009977 dual effect Effects 0.000 title description 2
- 239000003921 oil Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 7
- 230000001050 lubricating effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses an automatic lubricating oil regulation and control system and method for a DCT (discrete cosine transformation) transmission, and particularly, a cavity is arranged at the top of a main shell of the DCT transmission and used for storing lubricating oil which does not participate in working, and the lubricating oil in the cavity is released under the condition of meeting the set temperature and participates in the lubricating work of the transmission, so that the oil level of a gear cavity of the transmission can be dynamically regulated, the lubricating oil amount participating in the lubricating in a speed changing system is reduced when the transmission works under medium and small loads, the oil stirring loss is reduced, and the efficiency of the transmission is improved; when the speed changer works under a large load, sufficient lubricating oil can be provided, so that the whole speed changing system can work reliably. The invention can reduce the height of the gear liquid level under certain working conditions by actively adjusting the amount of the lubricating oil participating in the work in the transmission, reduce the oil stirring loss, improve the transmission efficiency of the system and reduce the oil consumption; and the reliability of the system can be preferentially met under some extreme working conditions.
Description
Technical Field
The invention relates to the field of transmission control, in particular to an automatic lubricating oil regulation and control system and method for a DCT (discrete cosine transformation) transmission.
Background
In the existing DCT automatic transmission, the cooling system is often implemented by a separate component, and there is a contradiction between cooling and efficiency, specifically, when the more lubricating oil is provided for lubrication of the gears (the cooling effect is improved), but the more the transmission churning loss is caused, the lower the efficiency is. At present, no reliable active regulation strategy in the prior art can solve the problems that: (1) under medium and small loads, the efficiency is mainly improved, and the system loss is reduced as much as possible; (2) and under the heavy load, the temperature of the whole transmission is mainly ensured in a centralized way.
Disclosure of Invention
In view of the above, the present invention is directed to a system and method for automatically controlling lubricating oil for a DCT transmission to solve the above-mentioned problems.
The technical scheme adopted by the invention is as follows:
in a first aspect, an automatic lubricating oil regulation system for a DCT transmission, comprising:
a cavity is arranged in the top of the main shell of the DCT, the cavity is connected with a clutch cavity of the DCT through a preset oil duct, and the cavity is used for storing lubricating oil from the clutch cavity;
the cavity adopts a sealing structure, and the lower part of the cavity is provided with a switch valve; and
a first temperature sensor is arranged in the main shell, and a second temperature sensor is arranged in the clutch shell;
the switch valve, the first temperature sensor and the second temperature sensor are respectively in electric signal connection with a controller of the transmission.
In at least one possible implementation manner, the switch valve, the first temperature sensor and the second temperature sensor are respectively in electric signal connection with a hydraulic control module of the controller.
In at least one possible implementation manner, the cavity is connected with a gear cavity of the DCT transmission through a preset oil passage.
In a second aspect, an automatic lubricating oil regulation and control method based on the automatic lubricating oil regulation and control system includes:
providing lubricating oil with preset capacity to a clutch cavity of a DCT for cooling;
when the clutch rotates, the switch valve at the lower part of the cavity is triggered to be opened, so that the lubricating oil which is cooled and then remains at the bottom of the clutch cavity enters the cavity;
detecting the temperature in the main shell and the clutch shell in real time;
determining the type of the current working condition according to the temperature in the main shell and/or the temperature in the clutch shell;
and switching the opening and closing states of the switch valve according to the type of the current working condition.
In at least one possible implementation manner, the determining the current operating condition type according to the temperature in the main shell and/or the temperature in the clutch shell includes:
and when the temperature in the clutch shell is greater than the temperature in the main shell and exceeds a preset temperature difference threshold value, determining the working condition of larger load as preset.
In at least one possible implementation manner, the determining the current operating condition type according to the temperature in the main shell and/or the temperature in the clutch shell includes: and when the temperature in the clutch shell or the temperature in the main shell is greater than a preset temperature threshold value, determining the working condition as a preset large load.
In at least one possible implementation manner, the determining the current operating condition type according to the temperature in the main shell and/or the temperature in the clutch shell includes: and when the temperature rise slope of the temperature of the clutch shell is greater than a preset slope threshold value, determining the clutch shell as a preset larger-load working condition.
In at least one possible implementation manner, the switching on/off state of the switching valve according to the current working condition type includes: and under the working condition of large load, the trigger switch valve is opened.
In at least one possible implementation manner, the switching on/off state of the switching valve according to the current working condition type includes: when the temperature in the clutch housing is smaller than the temperature in the main housing and exceeds a preset temperature difference threshold, the temperature in the clutch housing and the temperature in the main housing are both smaller than a preset temperature threshold, and the temperature rise slope of the temperature of the clutch housing is smaller than a preset slope threshold, the trigger switch valve is closed.
The main design concept of the invention is that a cavity is arranged at the top of a main shell of the DCT transmission, and the cavity is used for storing lubricating oil which does not participate in the work, and the lubricating oil in the cavity is released under the condition of meeting the set temperature to participate in the lubricating work of the DCT transmission, so that the oil level of a gear cavity of the DCT transmission can be dynamically adjusted, the lubricating oil amount participating in the lubricating in a speed changing system is reduced when the transmission works under medium and small loads, the oil stirring loss is reduced, and the efficiency of the transmission is improved; when the speed changer works under a large load, sufficient lubricating oil can be provided, so that the whole speed changing system can work reliably. The invention can reduce the height of the gear liquid level under certain working conditions by actively adjusting the amount of the lubricating oil participating in the work in the transmission, reduce the oil stirring loss, improve the transmission efficiency of the system and reduce the oil consumption; and in other extreme conditions, the reliability of the system can be preferentially met.
Furthermore, the auxiliary heat dissipation of the shell can be realized through a cavity arranged at the upper part of the main shell.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of an automatic lubricating oil regulation method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The invention provides an embodiment of an automatic lubricating oil regulation and control system for a DCT (discrete cosine transformation) transmission, and particularly, a cavity can be arranged in the top of a main shell of the DCT transmission, the cavity is connected with a clutch cavity of the DCT transmission through a preset oil duct, and the cavity is used for storing lubricating oil from the clutch cavity; the cavity adopts a sealing structure, and the lower part of the cavity is provided with a switch valve; a first temperature sensor is arranged in the main shell, and a second temperature sensor is arranged in the clutch shell; the switch valve, the first temperature sensor and the second temperature sensor are respectively in electric signal connection with a controller of the transmission.
Further, the switch valve, the first temperature sensor and the second temperature sensor are respectively in electric signal connection with a hydraulic control module of the controller.
Further, the cavity is connected with a gear cavity of the DCT through a preset oil duct.
Based on the foregoing improved embodiment, the present invention provides an automatic regulating method for lubricating oil, as shown in fig. 1, including:
step S1, providing lubricating oil with preset volume to a clutch cavity of the DCT for cooling;
step S2, when the clutch rotates, the switch valve at the lower part of the cavity is triggered to open, so that the lubricating oil left at the bottom of the clutch cavity after cooling enters (is thrown into) the cavity;
step S3, detecting the temperature in the main shell and the temperature in the clutch shell in real time;
step S4, determining the type of the current working condition according to the temperature in the main shell and/or the temperature in the clutch shell;
and step S5, switching the opening and closing states of the switch valve according to the type of the current working condition.
Further, the determining of the current operating condition type includes at least three parallel conditions of the larger load operating condition according to the temperature in the main housing and/or the temperature in the clutch housing (here, the larger load operating condition is a preset operating condition, and has a corresponding concept and no absolute concept):
(1) and when the temperature in the clutch shell is greater than the temperature in the main shell and exceeds a preset temperature difference threshold value, determining the working condition of larger load as preset.
(2) When the temperature in the clutch shell or the temperature in the main shell is larger than a preset temperature threshold (such as 120 ℃), the preset large load working condition is determined.
(3) And when the temperature rise slope of the temperature of the clutch shell is greater than a preset slope threshold (such as 5 ℃/s), determining as a preset larger load working condition.
And under the condition of larger load, the switch valve is triggered to open, so that lubricating oil stored in the cavity from the clutch cavity enters the DCT box, and the oil level of the gear cavity can be preferably raised to preferentially ensure the cooling effect under the extreme condition.
In addition, when the temperature in the clutch housing is smaller than the temperature in the main housing and exceeds a preset temperature difference threshold, the temperature in the clutch housing and the temperature in the main housing are both smaller than the preset temperature threshold, and the temperature rise slope of the temperature of the clutch housing is smaller than a preset slope threshold, the switch valve is triggered to be closed, namely, under the non-extreme condition, the lubricating oil in the cavity is not released, the oil stirring loss is reduced, and therefore the efficiency of the transmission is improved.
In summary, the main design concept of the present invention is that a cavity is arranged at the top of a main casing of the DCT transmission, and the cavity is used for storing lubricating oil that does not participate in operation, and releasing the lubricating oil in the cavity under a set temperature condition to participate in the lubricating operation of the DCT transmission, so that the oil level of a gear cavity of the DCT transmission can be dynamically adjusted, and when the transmission operates under a medium-small load, the amount of lubricating oil that participates in the lubricating operation in a transmission system is reduced, thereby reducing oil stirring loss and improving transmission efficiency; when the speed changer works under a large load, sufficient lubricating oil can be provided, so that the whole speed changing system can work reliably. The invention can reduce the height of the gear liquid level under certain working conditions by actively adjusting the amount of the lubricating oil participating in the work in the transmission, reduce the oil stirring loss, improve the transmission efficiency of the system and reduce the oil consumption; and in other extreme conditions, the reliability of the system can be preferentially met.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (9)
1. An automatic lube oil regulation system for a DCT transmission, comprising:
a cavity is arranged in the top of the main shell of the DCT, the cavity is connected with a clutch cavity of the DCT through a preset oil duct, and the cavity is used for storing lubricating oil from the clutch cavity;
the cavity adopts a sealing structure, and the lower part of the cavity is provided with a switch valve; and
a first temperature sensor is arranged in the main shell, and a second temperature sensor is arranged in the clutch shell;
the switch valve, the first temperature sensor and the second temperature sensor are respectively in electric signal connection with a controller of the transmission.
2. The automatic lubricating oil regulation system for a DCT transmission of claim 1, wherein the on-off valve, the first temperature sensor, and the second temperature sensor are each in electrical signal connection with a hydraulic control module of the controller.
3. The automatic lubricating oil regulation and control system for the DCT transmission according to claim 1 or 2, wherein the cavity is connected with a gear cavity of the DCT transmission through a preset oil passage.
4. An automatic lubricating oil regulation and control method based on the automatic lubricating oil regulation and control system of any one of claims 1 to 3, characterized by comprising the following steps:
providing lubricating oil with preset capacity to a clutch cavity of a DCT for cooling;
when the clutch rotates, the switch valve at the lower part of the cavity is triggered to be opened, so that the lubricating oil which is cooled and then remains at the bottom of the clutch cavity enters the cavity;
detecting the temperature in the main shell and the clutch shell in real time;
determining the type of the current working condition according to the temperature in the main shell and/or the temperature in the clutch shell;
and switching the opening and closing states of the switch valve according to the type of the current working condition.
5. The automatic lubricating oil regulation method of claim 4 wherein determining the current operating condition type based on the temperature in the main housing and/or the temperature in the clutch housing comprises:
and when the temperature in the clutch shell is greater than the temperature in the main shell and exceeds a preset temperature difference threshold value, determining the working condition of larger load as preset.
6. The automatic lubricating oil regulation method of claim 4 wherein determining the current operating condition type based on the temperature in the main housing and/or the temperature in the clutch housing comprises: and when the temperature in the clutch shell or the temperature in the main shell is greater than a preset temperature threshold value, determining the working condition as a preset large load.
7. The automatic lubricating oil regulation method of claim 4 wherein determining the current operating condition type based on the temperature in the main housing and/or the temperature in the clutch housing comprises: and when the temperature rise slope of the temperature of the clutch shell is greater than a preset slope threshold value, determining the clutch shell as a preset larger-load working condition.
8. The automatic lubricating oil regulation and control method according to any one of claims 4 to 7, wherein the switching of the on-off state of the on-off valve according to the current working condition type comprises: and under the working condition of large load, the trigger switch valve is opened.
9. The automatic lubricating oil regulation and control method according to any one of claims 4 to 7, wherein the switching of the on-off state of the on-off valve according to the current working condition type comprises: when the temperature in the clutch housing is smaller than the temperature in the main housing and exceeds a preset temperature difference threshold, the temperature in the clutch housing and the temperature in the main housing are both smaller than a preset temperature threshold, and the temperature rise slope of the temperature of the clutch housing is smaller than a preset slope threshold, the trigger switch valve is closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467960.5A CN114060500B (en) | 2021-12-03 | 2021-12-03 | Automatic lubricating oil regulating and controlling system and method for DCT (discrete cosine transform) speed changer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467960.5A CN114060500B (en) | 2021-12-03 | 2021-12-03 | Automatic lubricating oil regulating and controlling system and method for DCT (discrete cosine transform) speed changer |
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| CN114060500A true CN114060500A (en) | 2022-02-18 |
| CN114060500B CN114060500B (en) | 2024-06-28 |
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| CN109099155A (en) * | 2018-10-08 | 2018-12-28 | 重庆长安汽车股份有限公司 | A kind of DCT speed changer double pump system, control method and automobile |
| CN109340358A (en) * | 2018-11-16 | 2019-02-15 | 吉林大学 | A kind of transmission oil amount control device and its control method |
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| CN111832143A (en) * | 2019-03-29 | 2020-10-27 | 上海汽车变速器有限公司 | Dry-type double-clutch temperature measuring and calculating method based on temperature field heat transfer |
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