CN112177753A - Control method and control device of thermal management module under engine warm-up working condition - Google Patents

Control method and control device of thermal management module under engine warm-up working condition Download PDF

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CN112177753A
CN112177753A CN202010851874.3A CN202010851874A CN112177753A CN 112177753 A CN112177753 A CN 112177753A CN 202010851874 A CN202010851874 A CN 202010851874A CN 112177753 A CN112177753 A CN 112177753A
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engine
water temperature
management module
thermal management
temperature
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CN112177753B (en
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熊迪
向飞
丁伟
施发义
欧阳丹
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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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
    • 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
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • 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
    • F01P2050/00—Applications
    • F01P2050/22—Motor-cars

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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 application discloses control method and control device of a thermal management module under an engine warm-up working condition, and relates to the technical field of engine cooling system control, wherein the control method comprises the following steps: acquiring the rotating speed and the water temperature of the engine, and inquiring the corresponding target water temperature according to a preset engine target water temperature map; and judging whether the engine is in cold start according to the acquired water temperature and the inquired target water temperature, if so, acquiring and opening a target opening amount to a thermal management module at intervals, and otherwise, acquiring and opening the target opening amount to the thermal management module by adopting PID control. The application can truly reflect the operation working condition of the engine so as to reduce oil consumption and improve the economical efficiency of the engine.

Description

Control method and control device of thermal management module under engine warm-up working condition
Technical Field
The application relates to the technical field of control of engine cooling systems, in particular to a control method and a control device of a thermal management module under an engine warm-up working condition.
Background
The automobile engine gradually uses the thermal management module to replace a traditional thermostat to control the flow speed of the cooling liquid of the circulating branch of the engine cooling system so as to realize temperature control and achieve better oil consumption and emission effects.
The thermostat is limited by the working principle, and when the temperature of an engine cooling system is low, the small circulation is fully opened, and the large circulation is fully closed; when the temperature of the engine cooling system rises, the opening degree of the small circulation is reduced, and the opening degree of the large circulation is increased until the small circulation is completely closed and the large circulation is completely opened. The opening of the valve is controlled by the motor of the heat management module, and the opening adjustment of 0-100% can be realized in a small cycle under the condition that a large cycle is completely closed. Before the engine reaches the ideal working temperature (generally 90-105 ℃), especially at the stage of low rotating speed and low water temperature, the small circulation is controlled by small opening or even zero opening, so that the heat loss of the engine caused by the flowing of the cooling liquid can be effectively reduced, the engine is quickly warmed up, and the oil consumption and the emission are reduced.
When the engine is in a warm-up condition, the control of the thermal management module generally controls the valve of the thermal management module to be in a smaller opening degree according to the ambient temperature and the water temperature of the engine. Although such a control form can reduce the flow of the coolant inside the engine body and the radiator to reduce the heat radiation, to increase the warming-up speed. However, the ambient temperature and the engine water temperature do not reflect the operating state of the engine to the maximum extent, and thus the accuracy of the opening degree control of the thermal management module is limited.
Disclosure of Invention
The embodiment of the application provides a control method and a control device of a thermal management module under an engine warm-up working condition, which can truly reflect the operation working condition of an engine so as to reduce oil consumption and improve the economical efficiency of the engine.
In one aspect, an embodiment of the present application provides a control method for a thermal management module under an engine warm-up condition, where the control method includes:
acquiring the rotating speed and the water temperature of the engine, and inquiring the corresponding target water temperature according to a preset engine target water temperature map;
and judging whether the engine is in cold start according to the acquired water temperature and the inquired target water temperature, if so, acquiring and opening a target opening amount to a thermal management module at intervals, and otherwise, acquiring and opening the target opening amount to the thermal management module by adopting PID control.
In this embodiment, preferably, the specific step of determining whether the engine is cold started according to the acquired water temperature and the queried target water temperature includes:
calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and judging whether the temperature difference is smaller than a preset boundary temperature, if so, enabling the engine to be in cold machine starting, and if not, enabling the engine to be in cold machine starting.
Preferably, the specific steps of the interval control obtaining and opening the target opening degree to the thermal management module are as follows:
controlling the thermal management module to close;
acquiring the rotating speed and the torque of the engine, and calculating to obtain the power of the engine;
calculating a target opening amount of the thermal management module according to the rated power of the engine and the obtained power;
determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature;
and controlling the thermal management module to be opened to the target opening amount according to the determined interval time, and continuing until the engine is judged to be in cold start or after the cold start is finished next time.
Preferably, the specific step of determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature is:
and multiplying the current temperature difference by the product of the preset basic control time, and dividing the product by the boundary temperature to obtain the interval time of the thermal management module.
Preferably, the value range of the basic control time is 5 s-30 s.
Preferably, the value range of the boundary temperature is 35-45 ℃.
Preferably, the specific step of obtaining and opening the target opening amount to the thermal management module by using PID control includes:
and acquiring and opening a target opening amount to the thermal management module by adopting PID closed-loop control according to the temperature difference between the inquired target water temperature and the acquired water temperature.
On the other hand, this application embodiment still provides a control device of thermal management module under engine warm-up operating mode, control device includes:
a rotational speed sensor for acquiring a rotational speed of the engine;
a temperature sensor for acquiring a water temperature of the engine;
a memory for storing a target water temperature map of the engine,
the processor is used for inquiring corresponding target water temperature according to a preset engine target water temperature map, the acquired rotating speed and water temperature of the engine; the system comprises a water temperature acquisition module, a heat management module, a water temperature acquisition module and a water temperature acquisition module, wherein the water temperature acquisition module is used for acquiring the water temperature of the engine;
and the controller is used for controlling the thermal management module to be opened to the target opening amount according to the acquired target opening amount.
Preferably, the processor specifically includes:
the temperature difference calculation module is used for calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and the judging module is used for judging whether the temperature difference is smaller than a preset boundary temperature, if so, the engine is in cold start, and if not, the engine is after the cold start is finished.
Preferably, the processor further specifically includes:
the power calculation module is used for acquiring the rotating speed and the torque of the engine and calculating the power of the engine;
the opening calculation module is used for calculating a target opening amount of the thermal management module according to rated power of an engine and the obtained power;
and the interval time determining module is used for determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature.
The beneficial effect that technical scheme that this application provided brought includes:
(1) the embodiment of the application provides a control method of a heat management module under an engine warm-up working condition, the running working condition of an engine is reflected by combining the rotating speed and the water temperature of the engine, the precision and the accuracy of water temperature control under the engine warm-up working condition can be improved, whether the engine is in the cold start process or is completely started by a cold machine is distinguished, the heat management module is opened and closed at intervals or the opening of the heat management module is controlled by a PID according to the corresponding running working condition, the oil consumption is reduced, and the economical efficiency of the engine is improved.
(2) In this embodiment, when the engine is started cold, the water temperature of the engine is relatively low, but the target water temperature is relatively high, the thermal management module is closed, the flow of the coolant in the engine can be reduced to the greatest extent, and the temperature rise speed of the coolant is improved.
(3) In the embodiment, after the engine is started by the cold machine, the PID is adopted to dynamically adjust the opening of the thermal management module, the response is fast, and the water temperature of the engine can be stably controlled, so that the fluctuation of the water temperature is small, the oil consumption is further reduced, and the economy of the engine is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for controlling a thermal management module under an engine warm-up condition according to an embodiment of the present disclosure;
FIG. 2 is a detailed flowchart illustrating a method for controlling a thermal management module under a warm-up condition of an engine according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of a control apparatus of a thermal management module under a warm-up condition of an engine according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a processor in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an embodiment of the present application provides a control method for a thermal management module under an engine warm-up condition, where the control method includes:
step S1: acquiring the rotating speed and the water temperature of the engine, and inquiring the corresponding target water temperature according to a preset engine target water temperature map;
step S2: and judging whether the engine is in cold start according to the acquired water temperature and the inquired target water temperature, if so, acquiring and opening a target opening amount to a thermal management module at intervals, and otherwise, acquiring and opening the target opening amount to the thermal management module by adopting PID control.
In the embodiment of the application, the operating condition of the engine can be reflected more truly by combining the rotating speed and the water temperature of the engine, so that whether the engine is started by a cold machine or after the cold machine is started is distinguished, and corresponding operating conditions, namely opening control of the corresponding heat management module is carried out during the cold machine start and after the cold machine start; when the engine is started in a cold state, the water temperature (coolant temperature) of the engine is much lower than the inquired target temperature, so that the heat management module is opened at intervals in time at this stage, the flow of coolant in the engine can be greatly reduced when the heat management module is closed, and the temperature rise speed of the coolant is improved; meanwhile, the thermal management modules are opened at intervals, so that the uniformity of the temperature of the cooling liquid in the water jacket of the engine can be guaranteed, the aim of quickly warming up the engine is fulfilled, the oil consumption is reduced, and the economical efficiency of the engine is improved; after the cold machine of the engine is started, the PID is adopted to dynamically adjust the opening of the thermal management module, the response is fast, and the water temperature of the engine can be stably controlled, so that the fluctuation of the water temperature is small, the oil consumption is further reduced, and the economical efficiency of the engine is improved.
In this embodiment, preferably, the specific step of determining whether the engine is cold started according to the acquired water temperature and the queried target water temperature includes:
calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and judging whether the temperature difference is smaller than a preset boundary temperature, if so, enabling the engine to be in cold machine starting, and if not, enabling the engine to be in cold machine starting.
In the embodiment of the application, the target water temperature is inquired according to the water temperature and the rotating speed of the engine, the running state can be truly reflected, and whether the engine is in cold start or not is judged according to the temperature difference between the target water temperature and the water temperature, and the judgment mode is simple and easy to distinguish.
Preferably, the value range of the boundary temperature is 35-45 ℃. In this embodiment, the boundary temperature takes a value of 40 ℃, which is a switching boundary between when the engine is in cold start and after the cold start is finished, and an actual value is obtained empirically.
Further, in step S2, the specific step of the interval control acquiring and opening the interval control to the target opening of the thermal management module is:
s201: controlling the thermal management module to close;
s202: acquiring the rotating speed and the torque of the engine, and calculating to obtain the power of the engine;
s203: calculating a target opening amount of the thermal management module according to the rated power of the engine and the obtained power;
s204: determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature;
s205: and controlling the thermal management module to be opened to the target opening amount according to the determined interval time, and continuing until the engine is judged to be in cold start or after the cold start is finished next time.
In this embodiment, when the engine is started in a cold state, the water temperature of the engine is relatively low, but the target water temperature is relatively high, and the target water temperature is generally 90 ℃ to 105 ℃, so that the opening degree of the thermal management module is controlled to be 0%, that is, the thermal management module is closed, the flow of the coolant in the engine can be reduced to the greatest extent, and the temperature rise speed of the coolant can be increased; however, the temperature uniformity of the coolant in the water jacket of the engine is poor, so that the thermal management module is opened at intervals, the temperature uniformity of the coolant in the water jacket of the engine can be guaranteed, the purpose of quickly warming up the engine is achieved, the oil consumption is reduced, and the economical efficiency of the engine is improved.
Specifically, a target opening value of the thermal management module
Figure BDA0002644994140000071
Wherein α is the target opening value, PiIs the power of the engine, P0Is the rated power of the engine. Meanwhile, after the opening degree of the heat management module is opened to alpha, the opening degree is maintained for two seconds, and the temperature uniformity of the cooling liquid in the water jacket of the engine can be effectively guaranteed.
Preferably, the specific steps of step S204 are:
and multiplying the current temperature difference by the product of the preset basic control time, and dividing the product by the boundary temperature to obtain the interval time of the thermal management module.
Furthermore, the value range of the basic control time is 5 s-30 s. The basic control time can be taken within 5 s-30 s according to different engines, wherein the specific value is obtained empirically, and in the embodiment of the application, the basic control time is taken as 15 s.
It can be seen that the interval time of the thermal management module in the embodiment of the present application
Figure BDA0002644994140000081
In the formula, T is interval time, and Δ T is the current temperature difference.
Preferably, in step S2, the specific step of obtaining and opening the target opening amount to the thermal management module by using PID control includes:
and acquiring and opening a target opening amount to the thermal management module by adopting PID closed-loop control according to the temperature difference between the inquired target water temperature and the acquired water temperature.
In the embodiment, after the engine is started by the cold machine, the PID is adopted to dynamically adjust the opening of the thermal management module, the response is fast, and the water temperature of the engine can be stably controlled, so that the fluctuation of the water temperature is small, the oil consumption is further reduced, and the economy of the engine is improved.
When the thermal management module adopts PID closed-loop control, if the difference value between the water temperature and the target water temperature is larger than a preset upper limit temperature difference, the opening of the thermal management module is increased by adopting PID control; if the difference value between the water temperature and the target water temperature is smaller than a preset lower limit temperature difference, reducing the opening of the thermal management module by adopting PID control; and if the difference value between the water temperature and the target water temperature is between the upper limit temperature difference and the lower limit temperature difference, controlling the opening of the thermal management module to be unchanged by adopting PID.
Specifically, the upper limit temperature difference is 2, and the lower limit temperature difference is-2. In the embodiment of the application, when the water temperature is lower than the target water temperature minus 2, the temperature is too low, the opening degree of the thermal management module is reduced by adopting PID control, the water temperature of the engine can be properly increased, and the running performance of the engine is improved; when the water temperature is higher than the target water temperature plus 2, the temperature is too high, the opening degree of the thermal management module is increased by adopting PID control, the flow rate of the cooling liquid is increased, and the water temperature of the engine is properly reduced to be more proper.
As shown in fig. 2, an embodiment of the present application specifically provides a control method for a thermal management module under an engine warm-up condition, specifically including:
step N1: acquiring the rotating speed and the water temperature of the engine, inquiring the corresponding target water temperature according to a preset engine target water temperature map, and turning to the step N2;
step N2: calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature, and turning to the step N3;
step N3: judging whether the temperature difference is smaller than a preset boundary temperature, if so, executing a step N4, otherwise, executing a step N9;
step N4: controlling the thermal management module to close and going to step N5;
step N5: acquiring the rotating speed and the torque of the engine, calculating to obtain the power of the engine, and turning to the step N6;
step N6: calculating a target opening amount of the thermal management module according to the rated power of the engine and the obtained power, and turning to the step N7;
step N7: multiplying the current temperature difference by the product of the preset basic control time, dividing the product by the boundary temperature to obtain the interval time of the thermal management module, and turning to the step N8;
step N8: controlling the thermal management module to be opened to the target opening amount according to the determined interval time, continuing until the engine is judged to be in cold start or after the cold start is finished next time, and turning to the step N3;
step N9: and acquiring and opening a target opening amount to the thermal management module by adopting PID closed-loop control.
Referring to fig. 3, in another aspect, an embodiment of the present application further provides a control device of a thermal management module in an engine warm-up condition, where the control device includes:
a rotational speed sensor for acquiring a rotational speed of the engine;
a temperature sensor for acquiring a water temperature of the engine;
a memory for storing a target water temperature map of the engine,
the processor is used for inquiring corresponding target water temperature according to a preset engine target water temperature map, the acquired rotating speed and water temperature of the engine; the system comprises a water temperature acquisition module, a heat management module, a water temperature acquisition module and a water temperature acquisition module, wherein the water temperature acquisition module is used for acquiring the water temperature of the engine;
and the controller is used for controlling the thermal management module to be opened to the target opening amount according to the acquired target opening amount.
In this application embodiment, set up speed sensor, temperature sensor among the controlling means, use speed sensor, temperature sensor are the persistence respectively and acquire the rotational speed, the temperature of engine to combine the rotational speed and the temperature of engine, reflect the operating condition of engine truthfully, and then distinguish when the engine is in cold machine start still after cold machine start, and to corresponding operating condition, when also being cold machine start, after cold machine start, carry out the aperture control of the heat management module that corresponds.
When the engine is started in a cold state, the water temperature (coolant temperature) of the engine is much lower than the inquired target temperature, so that the heat management module can be in a closed state for a long time at this stage, the flow of coolant in the engine is greatly reduced, and the temperature rise speed of the coolant is improved; meanwhile, the thermal management modules are opened at intervals, so that the uniformity of the temperature of the cooling liquid in the water jacket of the engine can be guaranteed, the friction in the cylinder can be reduced, the oil consumption is reduced, and the economical efficiency of the engine is improved; after the cold machine of the engine is started, the PID is adopted to dynamically adjust the opening of the thermal management module, the response is fast, and the water temperature of the engine can be stably controlled, so that the fluctuation of the water temperature is small, the oil consumption is further reduced, and the economical efficiency of the engine is improved.
Referring to fig. 4, preferably, the processor specifically includes:
the temperature difference calculation module is used for calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and the judging module is used for judging whether the temperature difference is smaller than a preset boundary temperature, if so, the engine is in cold start, and if not, the engine is after the cold start is finished.
Preferably, the processor further specifically includes:
the power calculation module is used for acquiring the rotating speed and the torque of the engine and calculating the power of the engine;
the opening calculation module is used for calculating a target opening amount of the thermal management module according to rated power of an engine and the obtained power;
and the interval time determining module is used for determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature.
The specific embodiment of the control device of the engine thermal management module provided in the embodiment of the present application has been described in the specific embodiment of the control method, and therefore, description thereof is omitted.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A control method of a thermal management module under an engine warm-up condition is characterized by comprising the following steps:
acquiring the rotating speed and the water temperature of the engine, and inquiring the corresponding target water temperature according to a preset engine target water temperature map;
and judging whether the engine is in cold start according to the acquired water temperature and the inquired target water temperature, if so, acquiring and opening a target opening amount to a thermal management module at intervals, and otherwise, acquiring and opening the target opening amount to the thermal management module by adopting PID control.
2. The method for controlling the thermal management module under the warm-up condition of the engine according to claim 1, wherein the specific step of judging whether the engine is cold-started or not according to the acquired water temperature and the inquired target water temperature is as follows:
calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and judging whether the temperature difference is smaller than a preset boundary temperature, if so, enabling the engine to be in cold machine starting, and if not, enabling the engine to be in cold machine starting.
3. The method for controlling the thermal management module under the warm-up condition of the engine according to claim 2, wherein the step of obtaining and opening the target opening degree to the thermal management module by interval control comprises the following specific steps:
controlling the thermal management module to close;
acquiring the rotating speed and the torque of the engine, and calculating to obtain the power of the engine;
calculating a target opening amount of the thermal management module according to the rated power of the engine and the obtained power;
determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature;
and controlling the thermal management module to be opened to the target opening amount according to the determined interval time, and continuing until the engine is judged to be in cold start or after the cold start is finished next time.
4. The method for controlling the thermal management module under the warm-up condition of the engine according to claim 3, wherein the specific step of determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature comprises the following steps:
and multiplying the current temperature difference by the product of the preset basic control time, and dividing the product by the boundary temperature to obtain the interval time of the thermal management module.
5. The method of claim 4, wherein the base control time is in a range of 5s to 30 s.
6. The method for controlling the thermal management module under the warm-up condition of the engine according to claim 4, wherein the value range of the boundary temperature is 35-45 ℃.
7. The method for controlling a thermal management module during an engine warm-up condition according to claim 1, wherein the step of obtaining and opening the target opening amount to the thermal management module by using PID control comprises:
and acquiring and opening a target opening amount to the thermal management module by adopting PID closed-loop control according to the temperature difference between the inquired target water temperature and the acquired water temperature.
8. A control device of a thermal management module under an engine warm-up condition is characterized by comprising:
a rotational speed sensor for acquiring a rotational speed of the engine;
a temperature sensor for acquiring a water temperature of the engine;
a memory for storing a target water temperature map of the engine,
the processor is used for inquiring corresponding target water temperature according to a preset engine target water temperature map, the acquired rotating speed and water temperature of the engine; the system comprises a water temperature acquisition module, a heat management module, a water temperature acquisition module and a water temperature acquisition module, wherein the water temperature acquisition module is used for acquiring the water temperature of the engine;
and the controller is used for controlling the thermal management module to be opened to the target opening amount according to the acquired target opening amount.
9. The control device of the thermal management module during an engine warm-up condition according to claim 8, wherein the processor comprises:
the temperature difference calculation module is used for calculating the temperature difference between the target water temperature and the current water temperature according to the acquired water temperature and the inquired target water temperature;
and the judging module is used for judging whether the temperature difference is smaller than a preset boundary temperature, if so, the engine is in cold start, and if not, the engine is after the cold start is finished.
10. The control apparatus for the thermal management module during an engine warm-up condition of claim 8, wherein the processor further comprises:
the power calculation module is used for acquiring the rotating speed and the torque of the engine and calculating the power of the engine;
the opening calculation module is used for calculating a target opening amount of the thermal management module according to rated power of an engine and the obtained power;
and the interval time determining module is used for determining the interval time of the thermal management module according to the current temperature difference and the boundary temperature.
CN202010851874.3A 2020-08-21 2020-08-21 Control method and control device of thermal management module under engine warm-up working condition Active CN112177753B (en)

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CN114810319A (en) * 2021-01-28 2022-07-29 广州汽车集团股份有限公司 Control method of temperature control module, electronic device and computer readable storage medium
CN115247596A (en) * 2022-06-24 2022-10-28 东风汽车集团股份有限公司 Control method of engine thermal management system

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CN115247596A (en) * 2022-06-24 2022-10-28 东风汽车集团股份有限公司 Control method of engine thermal management system

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