CN112160828A - Medium temperature control system and method and engineering vehicle - Google Patents
Medium temperature control system and method and engineering vehicle Download PDFInfo
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- CN112160828A CN112160828A CN202011038216.9A CN202011038216A CN112160828A CN 112160828 A CN112160828 A CN 112160828A CN 202011038216 A CN202011038216 A CN 202011038216A CN 112160828 A CN112160828 A CN 112160828A
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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
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
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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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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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
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P2007/168—By varying the cooling capacity of a liquid-to-air heat-exchanger
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention provides a medium temperature control system, a method and an engineering vehicle, comprising the following steps: the system comprises a temperature sensor, a control module, an engine, a fan and a radiator; the temperature sensor is used for acquiring the temperature of the medium; the control module is used for controlling the rotating speed of the engine and the air quantity of the fan according to the medium temperature; the fan is used for providing air volume for the radiator so that the radiator can reduce the temperature of the medium; the control module is also used for comparing the medium temperature with a preset temperature value, and controlling the rotating speed of the engine to be increased to a first rotating speed threshold value when the medium temperature is greater than or equal to the preset temperature value; when the medium temperature is lower than a preset temperature value, controlling the engine to work at a preset rotating speed value of the current gear; and the preset rotating speed value of the current gear is smaller than the first rotating speed threshold value. The invention can reduce the medium temperature and reduce the equipment cost and the failure rate.
Description
Technical Field
The invention relates to the technical field of engineering vehicles, in particular to a medium temperature control system and method and an engineering vehicle.
Background
When a working vehicle (such as an excavator) works in a low gear, the temperature of a medium (such as hydraulic oil and water) is increased, and the overhigh temperature of the medium can not only influence the working stability of the excavator, but also increase the mechanical wear and shorten the service life of elements. Therefore, in practical applications, it is necessary to adjust the temperature of the medium during the low-gear operation of the excavator so as to perform safe and efficient work on the excavator. However, in the prior art, the medium temperature is usually adjusted by externally connecting a set of cooling system, and the cooling system is additionally provided with a variable pump, a motor and a set of control system, so that the equipment cost and the failure rate are increased.
Disclosure of Invention
In view of the above, the present invention provides a medium temperature control system, a method and an engineering vehicle, so as to reduce the medium temperature and reduce the equipment cost and the failure rate.
In a first aspect, an embodiment of the present invention provides a medium temperature control system, including: the system comprises a temperature sensor, a control module, an engine, a fan and a radiator; the temperature sensor is used for acquiring the temperature of the medium; the control module is used for controlling the rotating speed of the engine and the air quantity of the fan according to the medium temperature; the fan is used for providing air volume for the radiator so that the radiator can reduce the temperature of the medium; the control module is also used for comparing the medium temperature with a preset temperature value, and controlling the rotating speed of the engine to be increased to a first rotating speed threshold value when the medium temperature is greater than or equal to the preset temperature value; when the medium temperature is lower than a preset temperature value, controlling the engine to work at a preset rotating speed value of the current gear; and the preset rotating speed value of the current gear is smaller than the first rotating speed threshold value.
In one embodiment, the radiator comprises one or more of an intercooling radiator, a water radiator, and an oil radiator.
In one embodiment, the control module is further configured to control a pump device connected to the engine to operate at a predetermined constant power during the cooling process.
In one embodiment, the control module is further configured to control the engine speed to ramp up to the first speed threshold at a slow speed.
In a second aspect, an embodiment of the present invention provides a medium temperature control method, which is applied to any one of the systems provided in the first aspect, and the method includes: acquiring the medium temperature, and comparing the medium temperature with a preset temperature value; when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to be increased to a first rotating speed threshold value so as to increase the air volume of the fan and reduce the medium temperature; the first rotating speed threshold value is larger than a preset rotating speed value of the current gear; and when the medium temperature is lower than the preset temperature value, controlling the engine to stably and slowly reduce the rotating speed higher than the preset rotating speed value of the current gear to the preset rotating speed value of the current gear for working.
In one embodiment, when the medium temperature is greater than or equal to a preset temperature value, the step of controlling the engine speed to increase to a first speed threshold value so as to increase the air volume of the fan and reduce the medium temperature comprises the following steps: when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to rise to a first rotating speed threshold value; and increasing the air volume of the fan according to the first rotating speed threshold value so as to control the radiator to work and reduce the temperature of the medium.
In one embodiment, after the step of controlling the engine speed to increase to the first speed threshold to increase the air volume of the fan to reduce the temperature of the medium, the method further comprises: acquiring the temperature of the medium after cooling, and judging whether the temperature of the medium after cooling is greater than or equal to a preset temperature value or not; if yes, controlling the rotating speed of the engine to be increased to a second rotating speed threshold value so as to control the air volume of the fan to reduce the temperature of the medium; wherein the second rotational speed threshold is greater than the first rotational speed threshold; and if not, controlling the rotating speed of the engine to be reduced to the preset rotating speed value of the current gear.
In one embodiment, the engine speed is ramped up to the first or second speed threshold at a slow speed; as the engine speed increases, the gear of the vehicle remains unchanged.
In a third aspect, an embodiment of the invention provides an engineering vehicle, which includes any one of the medium temperature control systems provided in the first aspect.
In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of any one of the methods provided in the second aspect.
The embodiment of the invention has the following beneficial effects:
the system and the method for controlling the medium temperature and the engineering vehicle provided by the embodiment of the invention comprise the following steps: the system comprises a temperature sensor, a control module, an engine, a fan and a radiator; the temperature sensor is used for acquiring the temperature of the medium; the control module is used for controlling the rotating speed of the engine and the air quantity of the fan according to the medium temperature; the fan is used for providing air volume for the radiator so that the radiator can reduce the temperature of the medium; the control module is also used for comparing the medium temperature with a preset temperature value, and controlling the rotating speed of the engine to be increased to a first rotating speed threshold value when the medium temperature is greater than or equal to the preset temperature value; when the medium temperature is lower than a preset temperature value, controlling the engine to work at a preset rotating speed value of the current gear; and the preset rotating speed value of the current gear is smaller than the first rotating speed threshold value. The system can acquire the medium temperature through the temperature sensor, controls the rotating speed of the engine according to the medium temperature, and controls the rotating speed of the engine to rise when the medium temperature is greater than or equal to a preset temperature value, so that the air volume of the fan is increased, the medium temperature is reduced, equipment such as a variable pump and a motor is not required to be added, and the equipment cost and the failure rate are reduced while the medium temperature is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a media temperature control system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a hydraulic oil temperature control system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for controlling the temperature of a medium according to an embodiment of the present invention;
fig. 4 is a flowchart of a hydraulic oil temperature control method according to an embodiment of the present invention.
Icon:
10-a temperature sensor; 20-a control module; 30-an engine; 40-a fan; 50-a heat sink; 60-a pump; 70-a hydraulic oil tank; 80-hydraulic components.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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 normal working temperature of the hydraulic oil of the excavator is about 60 ℃, and the following problems can occur when the temperature of the hydraulic oil is too high: (1) the viscosity of the hydraulic oil is reduced, so that the flow of the oil flowing through the throttling small hole or the slit valve is increased, and the working stability is influenced; (2) after the oil temperature rises and the viscosity is reduced, a lubricating oil film between the surfaces which move relatively becomes thin, and the mechanical abrasion is increased; (3) accelerating the aging of the hydraulic oil and shortening the service life of the hydraulic components. Aiming at the existing problems, the medium temperature is usually regulated by externally connecting a set of cooling system in the prior art, and the cooling system is additionally provided with a variable pump, a motor and a set of control system, so that the equipment cost and the failure rate are increased.
Based on the above, the medium temperature control system, the medium temperature control method and the engineering vehicle provided by the embodiment of the invention can reduce the medium temperature and reduce the equipment cost and the failure rate.
For the understanding of the present embodiment, firstly, a detailed description is given to a medium temperature control system disclosed in the embodiment of the present invention, referring to a schematic structural diagram of a medium temperature control system shown in fig. 1, the system may include the following parts: temperature sensor 10, control module 20, engine 30, fan 40, and radiator 50; the temperature sensor 10 is used for acquiring the temperature of the medium; the control module 20 is used for controlling the rotating speed of the engine 30 and the air quantity of the fan 40 according to the medium temperature; the fan 40 is used for providing air volume for the radiator 50 so that the radiator 50 can reduce the temperature of the medium; the control module 20 is further configured to compare the medium temperature with a preset temperature value, and when the medium temperature is greater than or equal to the preset temperature value, control the rotation speed of the engine 30 to increase to a first rotation speed threshold; when the medium temperature is lower than the preset temperature value, controlling the engine 30 to work at the preset rotating speed value of the current gear; and the preset rotating speed value of the current gear is smaller than a first threshold value.
The medium temperature control system provided by the embodiment of the invention can acquire the medium temperature through the temperature sensor, control the rotating speed of the engine according to the medium temperature, and control the rotating speed of the engine to rise when the medium temperature is greater than or equal to the preset temperature value, so as to drive the air volume of the fan to be increased, thereby reducing the medium temperature without adding equipment such as a variable pump and a motor, and reducing the equipment cost and the failure rate while reducing the medium temperature.
In one embodiment, the radiator 50 may include one or more of an intercooling radiator, a water radiator, and an oil radiator; the control module 20 may also be configured to control a pumping device coupled to the engine 30 to operate at a predetermined constant power during the cool-down period.
It is considered that the vehicle is shaken vigorously by a momentary rise in the engine speed, resulting in a threat to the safety of the driver. In order to ensure the safety of the driver, the control module 20 is further configured to control the rotation speed of the engine 30 to smoothly increase to the first threshold at a slow speed, that is, the rotation speed of the engine 30 is slowly and smoothly increased, so that the vehicle shake can be reduced, and the safety of the driver can be ensured.
For convenience of understanding, an embodiment of the present invention provides a hydraulic oil temperature control system by taking hydraulic oil as an example, and referring to a schematic structural diagram of the hydraulic oil temperature control system shown in fig. 2, the hydraulic oil temperature control system is schematically shown to include: temperature sensor 10, control module 20, engine 30, fan 40, radiator 50, pump 60, hydraulic reservoir 70, and hydraulic components 80.
In one embodiment, the control module 20 is connected to the temperature sensor 10 and is configured to receive the temperature of the hydraulic oil obtained by the temperature sensor 10; the control module 20 is connected with the engine 30 and the fan 40 and is used for controlling the rotating speed of the engine 30 and the air volume of the fan 40; the control module 20 is further connected with the pump 60 and is used for controlling the pump 60 to work at a preset constant power in the cooling process; the temperature sensor 10 is also connected with the hydraulic oil tank 70 and is used for acquiring the temperature of hydraulic oil; the radiator 50 may be one or more of an intercooling radiator, a water radiator and an oil radiator, and is connected to the fan 40, the hydraulic oil tank 70 and the hydraulic component 80, and is used for cooling the hydraulic oil and the hydraulic component 80 under the driving of the fan 40. The radiator in the embodiment of the invention comprises one or more of an intercooling radiator, a water radiator and an oil radiator, and the hydraulic oil can be cooled in various ways, so that the cooling effect can be improved.
The hydraulic oil temperature control system provided by the embodiment of the invention can acquire the temperature of hydraulic oil through the temperature sensor, compare the temperature of the hydraulic oil with the preset temperature value, and automatically control the rotation speed of the engine to rise (the rotation speed slowly rises) under the condition that the gear of a vehicle is not required to be adjusted when the temperature of the hydraulic oil is greater than or equal to the preset temperature value, so that the rotation speed of the fan is driven to rise after the rotation speed of the engine rises, the air volume is increased to reduce the temperature of the hydraulic oil, the operation process of a driver can be simplified, and the time is saved; then continuously acquiring the temperature of the hydraulic oil through a temperature sensor after the temperature is reduced for a period of time, and if the temperature of the hydraulic oil is still larger than or equal to a preset temperature value, continuously controlling the rotating speed of the engine to be increased, and reducing the temperature of the hydraulic oil until the temperature of the hydraulic oil is reduced to be lower than the preset temperature value; if the temperature of the hydraulic oil is lower than the preset temperature value, the hydraulic system works normally (namely the rotating speed of the engine is reduced to the preset rotating speed value of the current gear); meanwhile, the pump equipment can be controlled to work at constant power in the cooling process, so that the purpose of cooling under the condition that the pump power is unchanged can be achieved, and stable operation of a vehicle is guaranteed.
For the medium temperature control system provided in the foregoing embodiment, an embodiment of the present invention further provides a medium temperature control method, which can be applied to the medium temperature control system, and refer to a flowchart of a medium temperature control method shown in fig. 3, where the method mainly includes the following steps S302 to S306:
step S302: and acquiring the medium temperature, and comparing the medium temperature with a preset temperature value.
In one embodiment, the medium temperature may be acquired by a temperature sensor, the temperature sensor may transmit the acquired medium temperature to the control module, and the control module may compare the received medium temperature with a preset temperature value.
Step S304: and when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to be increased to a first rotating speed threshold value so as to increase the air volume of the fan and reduce the medium temperature.
And the first rotating speed threshold value is greater than the preset rotating speed value of the current gear. In one embodiment, the medium may be hydraulic oil or water; the preset temperature values corresponding to different media are also not used, such as the preset temperature value of the hydraulic oil can be 60 degrees. When an engineering vehicle, such as an excavator, works in a low gear, the medium temperature can be collected once every a period of time (such as 30 seconds or one minute), the medium temperature value collected at the current moment is compared with a preset temperature value, if the medium temperature value collected at the current moment is larger than or equal to the preset temperature value, the rotating speed of an engine can be automatically controlled to be increased to a first rotating speed threshold value, at the moment, the rotating speed of the engine can be driven to be increased in the process of slowly increasing, and further the air volume of the fan is increased to reduce the medium temperature.
Step S306: and when the medium temperature is lower than the preset temperature value, controlling the engine to stably and slowly reduce the rotating speed higher than the preset rotating speed value of the current gear to the preset rotating speed value of the current gear for working.
In one embodiment, if the medium temperature value acquired at the current moment is less than a preset temperature value, the engine can be controlled to work at the current gear preset rotating speed value, namely the engine is controlled to work normally; and if the rotating speed of the engine is higher than the preset rotating speed value of the current gear, controlling the engine to stably and slowly reduce the rotating speed higher than the preset rotating speed value of the current gear to the preset rotating speed value of the current gear for working. The first rotation speed threshold may be set according to actual conditions, and is not limited herein.
The medium temperature control method provided by the embodiment of the invention can control the rotating speed of the engine according to the medium temperature, and when the medium temperature is greater than or equal to the preset temperature value, the rotating speed of the engine is controlled to be increased, so that the air volume of the fan is increased, the medium temperature is reduced, equipment such as a variable pump and a motor is not required to be added, and the equipment cost and the failure rate are reduced while the medium temperature is reduced.
In order to better reduce the temperature of the medium and improve the cooling efficiency, an embodiment of the present invention further provides a specific implementation manner that when the temperature of the medium is greater than or equal to a preset temperature value, the engine speed is controlled to increase to a first speed threshold value, so as to increase the air volume of the fan, so as to reduce the temperature of the medium, that is, for the step S102, the following steps 1 to 2 may be implemented:
step 1: and when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to rise to a first rotating speed threshold value.
Step 2: and increasing the air volume of the fan according to the first rotating speed threshold value so as to control the radiator to work and reduce the temperature of the medium.
Specifically, when the medium temperature is greater than or equal to the preset temperature value, the engine speed can be automatically controlled to be increased to a first speed threshold value, then the fan can be driven (controlled) to increase in speed according to the first speed threshold value (namely, the increased engine speed), so that the air volume of the fan is increased, and the radiator is controlled to work to reduce the medium temperature. In one embodiment, the gear of the vehicle is kept constant when the engine speed increases, and the pump device connected to the engine is operated at a predetermined constant power during the medium cooling.
Further, in order to ensure the reliability of medium cooling, after the engine works for a period of time at the rotating speed of the first rotating speed threshold value, the temperature of the medium after cooling can be obtained again, and whether the temperature of the medium after cooling is greater than or equal to a preset temperature value or not is judged; if yes, controlling the rotating speed of the engine to be increased to a second rotating speed threshold value so as to control the air volume of the fan to reduce the temperature of the medium; wherein the second rotational speed threshold is greater than the first rotational speed threshold; and if not, controlling the rotating speed of the engine to be reduced to the preset rotating speed value of the current gear.
In one embodiment, after the medium is cooled for a period of time, the temperature of the medium can be obtained through a temperature sensor, and the temperature of the medium is compared with a preset temperature value; if the temperature of the medium after temperature reduction is still larger than or equal to the preset temperature value, the rotating speed of the engine is continuously controlled to be increased to a second rotating speed threshold value (the second rotating speed threshold value is larger than the first rotating speed threshold value), so that the air volume of the fan is controlled to be continuously increased, and the temperature of the medium is reduced; if the temperature of the medium after cooling is lower than the preset temperature value, controlling the rotating speed of the engine to be reduced to the preset rotating speed value of the current gear to continue working, namely controlling the rotating speed of the engine to be slowly reduced to the preset rotating speed value of the current gear, so that the system works normally; meanwhile, the air volume of the fan can be controlled to be reduced.
In addition, in the process of increasing the rotating speed of the engine, in order to reduce vehicle shaking caused by the instant increase of the rotating speed and ensure the safety of a driver, the engine can be smoothly increased to the first rotating speed threshold value or the second rotating speed threshold value at a slow speed.
For convenience of understanding, the embodiment of the present invention provides a method for controlling a temperature of hydraulic oil by taking hydraulic oil as an example, referring to a flowchart of the method for controlling a temperature of hydraulic oil shown in fig. 4, including the following steps S402 to S412:
step S402: the hydraulic oil temperature is received. Specifically, the temperature of the hydraulic oil can be obtained through a temperature sensor, and the temperature sensor can be arranged on the hydraulic oil tank.
Step S404: judging whether the temperature of the hydraulic oil is greater than or equal to a preset temperature value or not; if yes, go to step S406, otherwise go to step S412.
Step S406: and controlling the rotating speed of the engine to rise so as to cool the hydraulic oil.
In one embodiment, the rotation speed of the engine can be automatically controlled to rise to the first rotation speed threshold, and at this time, the rotation speed of the fan can be driven to rise in the process of slowly rising the rotation speed of the engine, so that the air volume of the fan is increased, and the radiator is controlled to reduce the temperature of the hydraulic oil.
Step S408: the hydraulic oil temperature is received.
Specifically, the temperature of the hydraulic oil can be collected again through the temperature sensor after the radiator cools the hydraulic oil for a period of time.
Step S410: judging whether the temperature of the hydraulic oil is greater than or equal to a preset temperature value or not; if yes, go back to step S406, otherwise, go to step S412.
Step S412: and controlling the hydraulic system to work normally.
In one embodiment, when the temperature of the hydraulic oil is lower than the preset temperature value, the hydraulic system can be controlled to normally work, that is, the engine works at the current gear preset rotating speed value.
According to the hydraulic oil temperature control method provided by the embodiment of the invention, the temperature of the hydraulic oil is obtained through the temperature sensor, the temperature of the hydraulic oil is compared with the preset temperature value, when the temperature of the hydraulic oil is greater than or equal to the preset temperature value, the rotating speed of the engine can be automatically controlled to rise (the rotating speed slowly rises) under the condition that the gear of a vehicle does not need to be adjusted, the rotating speed of the engine rises, then the rotating speed of the fan is driven to rise, and the air volume is increased to reduce the temperature of the hydraulic oil; then continuously acquiring the temperature of the hydraulic oil through a temperature sensor after the temperature is reduced for a period of time, and if the temperature of the hydraulic oil is still larger than or equal to a preset temperature value, continuously controlling the rotating speed of the engine to be increased, and reducing the temperature of the hydraulic oil until the temperature of the hydraulic oil is reduced to be lower than the preset temperature value; if the temperature of the hydraulic oil is lower than the preset temperature value, the hydraulic system works normally (namely the rotating speed of the engine is reduced to the set rotating speed of the corresponding gear); meanwhile, the pump equipment can be controlled to work at constant power in the cooling process, so that the pump equipment can be cooled under the condition that the pump power is unchanged.
The embodiment of the invention provides an engineering vehicle, which comprises the medium temperature control system, the implementation principle and the generated technical effect of the engineering vehicle are the same as those of the embodiment, and for the sake of brief description, the corresponding content in the embodiment can be referred to where the embodiment is not mentioned.
The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the foregoing method embodiment, which is not described herein again.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A media temperature control system, comprising: the system comprises a temperature sensor, a control module, an engine, a fan and a radiator;
the temperature sensor is used for acquiring the temperature of the medium;
the control module is used for controlling the rotating speed of the engine and the air volume of the fan according to the temperature of the medium;
the fan is used for providing air volume for the radiator so that the radiator can reduce the temperature of the medium;
the control module is further used for comparing the medium temperature with a preset temperature value, and when the medium temperature is greater than or equal to the preset temperature value, controlling the rotating speed of the engine to rise to a first rotating speed threshold value; when the medium temperature is lower than the preset temperature value, controlling the engine to work at the current gear preset rotating speed value; and the preset rotating speed value of the current gear is smaller than a first rotating speed threshold value.
2. The media temperature control system of claim 1, wherein the radiator comprises one or more of an intercooling radiator, a water radiator, and an oil radiator.
3. The media temperature control system of claim 1, wherein the control module is further configured to control a pumping device coupled to the engine to operate at a predetermined constant power during the cool down.
4. The media temperature control system of claim 1, wherein the control module is further configured to control the engine speed to ramp up to the first speed threshold at a slow rate.
5. A method for controlling the temperature of a medium, the method being applied to the system according to any one of claims 1 to 4, the method comprising:
acquiring a medium temperature, and comparing the medium temperature with a preset temperature value;
when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to be increased to a first rotating speed threshold value so as to increase the air volume of the fan and reduce the medium temperature; the first rotating speed threshold value is larger than a preset rotating speed value of the current gear;
and when the medium temperature is lower than a preset temperature value, controlling the engine to stably and slowly reduce the rotating speed higher than the preset rotating speed value of the current gear to the preset rotating speed value of the current gear for working.
6. The method of claim 5, wherein the step of controlling the engine speed to increase to a first speed threshold to increase the fan air volume to reduce the medium temperature when the medium temperature is greater than or equal to a preset temperature value comprises:
when the medium temperature is greater than or equal to a preset temperature value, controlling the rotating speed of the engine to rise to a first rotating speed threshold value;
and increasing the air volume of the fan according to the first rotating speed threshold value so as to control the radiator to work and reduce the temperature of the medium.
7. The method of claim 5, wherein after the step of controlling the engine speed to increase to the first speed threshold to increase the fan air volume to decrease the media temperature, further comprising:
acquiring the temperature of the medium after cooling, and judging whether the temperature of the medium after cooling is greater than or equal to the preset temperature value;
if yes, controlling the rotating speed of the engine to be increased to a second rotating speed threshold value so as to control the air quantity of the fan to reduce the temperature of the medium; wherein the second rotational speed threshold is greater than the first rotational speed threshold;
and if not, controlling the rotating speed of the engine to be reduced to the preset rotating speed value of the current gear.
8. The method of claim 7, wherein the engine speed is ramped up at a slow speed to the first or second speed threshold; when the engine speed increases, the gear of the vehicle remains unchanged.
9. A working vehicle, characterized by comprising the medium temperature control system according to any one of claims 1 to 4.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of the preceding claims 6 to 8.
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