CN110905648A - Engine cooling control system and method - Google Patents
Engine cooling control system and method Download PDFInfo
- Publication number
- CN110905648A CN110905648A CN201811078491.6A CN201811078491A CN110905648A CN 110905648 A CN110905648 A CN 110905648A CN 201811078491 A CN201811078491 A CN 201811078491A CN 110905648 A CN110905648 A CN 110905648A
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- Prior art keywords
- fan
- engine
- speed ratio
- control module
- speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to an engine cooling control system and method. The method includes increasing a speed ratio of the engine to the fan, and setting the speed ratio of the fan control module to a first speed ratio when the engine is at a power point and setting the speed ratio of the fan control module to a second speed ratio when the engine is at a torque point, wherein the first speed ratio is less than the second speed ratio. The system includes a fan control module that adjusts a speed ratio of the fan control module based on a speed of the engine. The engine cooling control system and the engine cooling control method provided by the invention have the advantages that on the premise of not influencing the cooling capacity of the power point, the cooling capacity of the torque point is improved, the energy waste is avoided, the structure of a fan does not need to be increased or changed, and the realization is simple and easy.
Description
Technical Field
The invention relates to the technical field of engine cooling systems, in particular to an engine cooling control system and method.
Background
In practical applications of engine cooling systems, heat dissipation requirements are typically met at engine power points, while insufficient cooling capacity occurs at engine torque points.
In order to improve the heat dissipation capability of the torque point, measures such as increasing the size of the radiator, using a novel radiating pipe and a radiating belt, increasing the diameter of the fan, improving the blade profile of the fan and the like are generally adopted to improve the cooling capability.
However, the size of the radiator cannot be increased continuously due to the influence of the layout and the performance of the whole vehicle; the diameter of the fan cannot be increased continuously under the influence of the fan structure and the linear velocity of the blade tip; moreover, the method often wastes the cooling capacity of the power point, and the problem of insufficient cooling capacity of the torque point cannot be fundamentally solved.
Therefore, in order to improve the heat dissipation capability of the torque point, and simultaneously, not waste the cooling energy of the power point, and not need to increase the size of the existing heat dissipation system or make structural improvement on the existing heat sink, it is necessary to provide a new technology for improving the cooling capability of the heat sink.
Disclosure of Invention
The invention aims to provide an engine cooling control system and method, which are used for improving the cooling capacity of a torque point on the premise of not influencing the cooling capacity of a power point, avoiding energy waste and simply and conveniently realizing the cooling control of an engine without increasing or changing a fan structure.
The engine cooling control method of the present invention includes increasing a speed ratio of the engine to the fan, and setting the speed ratio of the fan control module to a first speed ratio when the engine is at a power point and setting the speed ratio of the fan control module to a second speed ratio when the engine is at a torque point, wherein the first speed ratio is less than the second speed ratio.
The engine cooling control method improves the speed ratio of the engine to the fan to 1.4.
According to the engine cooling control method, the speed ratio of the fan control module is changed by adjusting the control mode or gear of the electric control silicone oil fan or the common silicone oil fan or the electromagnetic clutch fan.
In the above engine cooling control method, the rotation speed of the fan is a product of the rotation speed of the engine, a speed ratio of the engine to the fan, and a speed ratio of the fan control module.
In the engine cooling control method, the speed ratio of the fan control module is between 0 and 1.
The invention also provides an engine cooling control system which is controlled by adopting the method and comprises a fan control module, wherein the control module adjusts the speed ratio of the fan control module according to the rotating speed of the engine.
In the cooling control system of the engine, the cooling control system further comprises an engine speed detection device for measuring the speed of the engine.
In the cooling control system of the engine, the fan control module is connected with the electric control silicone oil fan or the common silicone oil fan or the electromagnetic clutch fan.
In the cooling control system of the engine, the fan control module adjusts the control mode or the gear of the electric control silicone oil fan or the common silicone oil fan or the electromagnetic clutch fan according to the rotating speed of the engine.
In the engine cooling control system, the speed ratio set by the fan control module when the engine is at a power point is a first speed ratio, and the speed ratio set by the fan control module when the engine is at a torque point is a second speed ratio, wherein the first speed ratio is smaller than the second speed ratio. .
The engine cooling control system and the engine cooling control method provided by the invention have the advantages that on the premise of not influencing the cooling capacity of the power point, the cooling capacity of the torque point is improved, the energy waste is avoided, the structure of a fan does not need to be increased or changed, and the realization is simple and easy.
Drawings
FIG. 1 is a schematic diagram of a fan and cooling module performance curve fit according to an embodiment of the invention;
FIG. 2 is a graphical representation of the results of a low engine ratio torque point cooling performance simulation of an embodiment of the present invention;
FIG. 3 is a graphical representation of the results of a high engine ratio torque point cooling performance simulation of an embodiment of the present invention;
FIG. 4 is a diagram illustrating the simulation results of the power point cooling performance of the embodiment of the present invention.
Detailed Description
To facilitate understanding and implementing the invention by those of ordinary skill in the art, embodiments of the invention are now described with reference to the drawings.
With the popularization and use of high-horsepower engines, higher requirements are made on the heat dissipation capacity of the cooling system. The invention aims to adopt a high-speed ratio bracket fan and enable the fan to output higher air volume under different engine rotating speeds through a fan control module on the premise of not changing the diameter of the fan and the structure of a radiator so as to obviously improve the heat dissipation capacity of a cooling system.
As shown in fig. 1, the intersection point of the fan performance curve and the cooling module performance curve is the actual air volume of the cooling system at the rotation speed. In order to solve the problem of insufficient cooling capacity of the engine torque point, the cooling capacity can be improved by increasing the rotation speed of the torque point. The higher the rotation speed, the higher the air volume and the better the cooling capacity.
From the perspective of thermal management, NFan with cooling device＝NHair-like device×IHair-like device×IControl；
Wherein N isFan with cooling deviceIs the fan speed r/min; n is a radical ofHair-like deviceIs the engine speed r/min; i isHair-like deviceSetting the speed ratio of the engine fan; i isControlThe speed ratio of the fan control module is adjustable and ranges from 0 to 1; limited by fan structural performance and linear speed of blade tip (generally not exceeding 100m/s), NFan with cooling deviceMust not exceed the limit NLimit of。
Therefore, the invention improves I by adjusting the speed ratio of the fan control moduleHair-like deviceBased on the power point reduction IControlEnsure NFan with cooling deviceLess than NLimiting;torque point increase IControlThereby increasing the fan speed at the torque point and improving the cooling performance at the torque point. In summary, the engine cooling control method of the present invention includes increasing the speed ratio of the engine to the fan and while the engine is at power pointThe speed ratio of the fan control module is set to a first speed ratio and the speed ratio of the fan control module is set to a second speed ratio when the engine is at a torque point, wherein the first speed ratio is less than the second speed ratio.
Specifically, the engine to fan ratio may be increased to 1.4.
When the speed ratio of the fan control module is adjusted, the speed ratio of the fan control module can be changed by adjusting the control mode or gear of the electric control silicon oil or common silicon oil or the electromagnetic clutch fan.
Correspondingly, the invention also provides an engine cooling control system which is controlled by adopting the method. The engine cooling control system of the present invention generally includes a fan control module that adjusts a speed ratio of the fan control module based on a rotational speed of the engine.
In order to measure the rotational speed of the engine to determine whether the engine is at a power point or a torque point, the cooling control system further includes engine rotational speed detection means for measuring the rotational speed of the engine.
In order to realize the speed ratio adjustment of the fan control module, the fan control module is connected with different types of fans such as electric control silicon oil or common silicon oil or an electromagnetic clutch fan.
The fan control module can adjust the control mode or gear of the electric control silicon oil or common silicon oil or the electromagnetic clutch fan.
In the engine cooling control system, the speed ratio set by the fan control module when the engine is at a power point is a first speed ratio, and the speed ratio set by the fan control module when the engine is at a torque point is a second speed ratio, wherein the first speed ratio is smaller than the second speed ratio. .
The engine cooling control system and the engine cooling control method provided by the invention have the advantages that on the premise of not influencing the cooling capacity of the power point, the cooling capacity of the torque point is improved, the energy waste is avoided, the structure of a fan does not need to be increased or changed, and the realization is simple and easy.
Examples
The embodiment improves the speed ratio I of the fan of the engineHair-like deviceThen pass throughAdjusting the control strategy or gear of the electric control silicone oil/common silicone oil/electromagnetic clutch fan, changing the speed ratio of the control module, and reducing the power point IControlGuarantee NFan with cooling deviceNot exceeding a limit value NLimit of(ii) a Torque point increase IControl1, increase the torque point NFan with cooling deviceThereby improving the cooling capability of the torque point.
Taking a certain type of engine as an example, IHair-like device1.218, engine power point N is shown in fig. 4 and 2 using Kuli software simulation resultsHair-like deviceWhen 1900r/min, control IControlThe water inlet temperature of the radiator is 97.868 ℃ to meet the requirement; engine torque point NHair-like deviceWhen the speed is 1200r/min, IControlThe water inlet temperature of the radiator is 107.587 ℃ which is not satisfied.
Increase IHair-like deviceAt 1.4, the engine power point N is shown in FIG. 3 using the Kuli software simulation resultsHair-like deviceWhen 1900r/min, adjust IControlThe water inlet temperature of the radiator is 97.868 ℃ to meet the requirement, wherein the water inlet temperature is 0.87; engine torque point NHair-like deviceWhen the speed is 1200r/min, IControlThe radiator inlet water temperature is 99.437 ℃ satisfying the requirement, and the test data are shown in the following table.
The analysis result of the embodiment shows that the system and the method improve the cooling capacity of the torque point on the premise of not influencing the cooling capacity of the power point, and meet the actual requirement.
Although the present invention has been described with reference to the embodiments, those skilled in the art will appreciate that many variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An engine cooling control method comprising increasing a speed ratio of an engine to a fan and setting the speed ratio of a fan control module to a first speed ratio when the engine is at a power point and setting the speed ratio of the fan control module to a second speed ratio when the engine is at a torque point, wherein the first speed ratio is less than the second speed ratio.
2. The engine cooling control method according to claim 1, characterized in that the speed ratio of engine to fan is increased to 1.4.
3. The engine cooling control method according to claim 1 or 2, characterized in that the speed ratio of the fan control module is changed by adjusting a control mode or a gear of an electrically controlled silicone oil fan or a common silicone oil fan or an electromagnetic clutch fan.
4. The engine cooling control method according to claim 1 or 2, characterized in that the rotation speed of the fan is a product of the rotation speed of the engine, the engine-to-fan speed ratio, and the speed ratio of the fan control module.
5. The engine cooling control method according to claim 1 or 2, characterized in that the speed ratio of the fan control module is between 0 and 1.
6. An engine cooling control system controlled using the method of any of claims 1 to 5, wherein the system includes a fan control module that adjusts a speed ratio of the fan control module based on a speed of the engine.
7. The engine cooling control system according to claim 6, characterized by further comprising engine speed detection means for measuring a speed of the engine.
8. The engine cooling control system of claim 6, wherein the fan control module is connected to an electronically controlled silicone oil fan or a common silicone oil fan or an electromagnetic clutch fan.
9. The engine cooling control system of claim 8, wherein the fan control module adjusts a control mode or a gear of the electronically controlled silicone oil fan or the ordinary silicone oil fan or the electromagnetic clutch fan according to a rotational speed of an engine.
10. The engine cooling control system of claim 6, wherein the speed ratio set by the fan control module when the engine is at a power point is a first speed ratio and the speed ratio set by the fan control module when the engine is at a torque point is a second speed ratio, wherein the first speed ratio is less than the second speed ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811078491.6A CN110905648A (en) | 2018-09-14 | 2018-09-14 | Engine cooling control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811078491.6A CN110905648A (en) | 2018-09-14 | 2018-09-14 | Engine cooling control system and method |
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| CN110905648A true CN110905648A (en) | 2020-03-24 |
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| CN201811078491.6A Pending CN110905648A (en) | 2018-09-14 | 2018-09-14 | Engine cooling control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963237A (en) * | 2021-03-17 | 2021-06-15 | 潍柴动力股份有限公司 | Method, device and equipment for detecting running state of electric control silicone oil clutch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467139A (en) * | 1977-11-08 | 1979-05-30 | Toyota Motor Corp | Cooling fan device in internal combustion engine |
| CN1573155A (en) * | 2003-06-12 | 2005-02-02 | 臼井国际产业株式会社 | Method for control magnetic fan clutch |
| CN104153867A (en) * | 2014-07-29 | 2014-11-19 | 北京福田戴姆勒汽车有限公司 | Engine component and automobile with same |
| CN105604673A (en) * | 2015-09-30 | 2016-05-25 | 龙口中宇机械有限公司 | Safety type multi-speed electromagnetic fan clutch control device and control method |
-
2018
- 2018-09-14 CN CN201811078491.6A patent/CN110905648A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467139A (en) * | 1977-11-08 | 1979-05-30 | Toyota Motor Corp | Cooling fan device in internal combustion engine |
| CN1573155A (en) * | 2003-06-12 | 2005-02-02 | 臼井国际产业株式会社 | Method for control magnetic fan clutch |
| CN104153867A (en) * | 2014-07-29 | 2014-11-19 | 北京福田戴姆勒汽车有限公司 | Engine component and automobile with same |
| CN105604673A (en) * | 2015-09-30 | 2016-05-25 | 龙口中宇机械有限公司 | Safety type multi-speed electromagnetic fan clutch control device and control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963237A (en) * | 2021-03-17 | 2021-06-15 | 潍柴动力股份有限公司 | Method, device and equipment for detecting running state of electric control silicone oil clutch |
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