CN110671187B - Cooling control method, control device and control system for engine in vehicle - Google Patents
Cooling control method, control device and control system for engine in vehicle Download PDFInfo
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- CN110671187B CN110671187B CN201910945550.3A CN201910945550A CN110671187B CN 110671187 B CN110671187 B CN 110671187B CN 201910945550 A CN201910945550 A CN 201910945550A CN 110671187 B CN110671187 B CN 110671187B
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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
- F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
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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
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/026—Thermostatic control
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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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
- F01P2025/00—Measuring
- F01P2025/04—Pressure
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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
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
- F01P2025/64—Number of revolutions
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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
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
Abstract
The invention belongs to the technical field of vehicle engines, and particularly relates to a cooling control method, a cooling control device and a cooling control system for an engine in a vehicle. The cooling control method of an engine in a vehicle of the present invention includes the steps of: acquiring the current state of a water pump in a vehicle; controlling the rotating speed of the water pump to be reduced according to the fact that the water inlet pressure value of the water pump is lower than a preset pressure value; and increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than the preset temperature value. According to the cooling control method of the engine in the vehicle, the rotating speed of the water pump is controlled to be reduced according to the condition that the water inlet pressure value of the water pump is lower than the preset pressure value, so that the cavitation phenomenon of the water pump caused by the over-low water inlet pressure is relieved, meanwhile, the rotating speed of the fan is increased according to the condition that the water outlet temperature of the water pump is higher than the preset temperature value, and the influence of the low rotating speed of the water pump on the cooling effect of the engine is reduced.
Description
Technical Field
The invention belongs to the technical field of vehicle engines, and particularly relates to a cooling control method, a cooling control device and a cooling control system for an engine in a vehicle.
Background
Cavitation: when the pressure of the liquid is reduced to the vaporization pressure at a certain temperature, the liquid generates bubbles, the bubbles enter a high-pressure area along with flowing liquid, the bubbles are suddenly condensed under pressure, and then the surrounding liquid is supplemented to the high-pressure area, so that the hydraulic impact is caused. The phenomenon is generated on the solid wall, so that the overflowing component is damaged by impact, the cavitation process is unstable, the water pump generates vibration and noise, and meanwhile, the flow and the lift are reduced and the efficiency is reduced because the impeller channel is blocked by air bubbles during cavitation.
When the water inlet pressure of the water pump is too low, the water pump is easy to be subjected to cavitation, the performance of the water pump is influenced, the cooling capacity of an engine is insufficient, and the reliability of the engine is influenced.
The existing water pump has too low water inlet pressure, which easily causes cavitation of the water pump and causes insufficient cooling capacity of an engine.
Disclosure of Invention
The invention aims to at least solve the problems that the existing water pump is easy to cause water pump cavitation and insufficient in cooling capacity of an engine due to too low water inlet pressure. The purpose is realized by the following technical scheme:
a first aspect of the invention proposes a cooling control method of an engine in a vehicle, wherein the method includes the steps of:
acquiring the current state of a water pump in a vehicle;
controlling the rotating speed of the water pump to be reduced according to the fact that the water inlet pressure value of the water pump is lower than a preset pressure value;
and increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than the preset temperature value.
According to the cooling control method of the engine in the vehicle, the rotating speed of the water pump is controlled to be reduced according to the condition that the water inlet pressure value of the water pump is lower than the preset pressure value, so that the cavitation phenomenon of the water pump caused by the over-low water inlet pressure is relieved, meanwhile, the rotating speed of the fan is increased according to the condition that the water outlet temperature of the water pump is higher than the preset temperature value, and the influence of the low rotating speed of the water pump on the cooling effect of the engine is reduced.
In addition, the cooling control method of the engine in the vehicle according to the present invention may further have the following additional technical features:
in some embodiments of the invention, the obtaining the current state of the water pump in the vehicle comprises:
judging that the water pump is an electromagnetic water pump;
comparing the current water inlet pressure value of the electromagnetic water pump with a first preset pressure value;
and determining that the water inlet pressure value of the electromagnetic water pump is lower than a first preset pressure value according to the condition that the current water inlet pressure value of the electromagnetic water pump is smaller than the first preset pressure value.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the water inlet pressure value of the water pump being lower than the first preset pressure value includes:
and controlling the electromagnetic water pump in the vehicle to run at half speed according to the full-speed running of the electromagnetic water pump, wherein the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set first duration.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the water inlet pressure value of the water pump being lower than the first preset pressure value further includes:
and alarming according to the half-speed operation of the electromagnetic water pump and the condition that the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set second duration.
In some embodiments of the invention, the obtaining the current state of the water pump in the vehicle comprises:
judging that the water pump is a stepless speed change water pump;
comparing the current water inlet pressure value of the infinitely variable speed water pump with a second preset pressure value;
and determining that the water inlet pressure value of the infinitely variable speed water pump is lower than a second preset pressure value according to the condition that the current water inlet pressure value of the infinitely variable speed water pump is lower than the second preset pressure value.
In some embodiments of the invention, the second preset pressure value of the infinitely variable speed water pump is determined according to the current rotating speed of the infinitely variable speed water pump.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the fact that the water inlet pressure value of the water pump is lower than the second preset pressure value includes:
and controlling the infinitely variable speed water pump in the vehicle to run at a reduced speed according to the condition that the rotating speed of the infinitely variable speed water pump is greater than the preset rotating speed, and the water inlet pressure value of the water pump is lower than the second preset pressure value, and the duration exceeds the set third duration.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the fact that the water inlet pressure value of the water pump is lower than the second preset pressure value further includes:
and alarming according to the condition that the rotating speed of the infinitely variable speed water pump is lower than the preset rotating speed, and the duration of the water inlet pressure value of the water pump is lower than the second preset pressure value and exceeds the set fourth duration.
Another aspect of the present invention also provides a cooling control apparatus for an in-vehicle engine, which is configured to execute the above-described cooling control method for an in-vehicle engine, the cooling control apparatus including: the water pump control system comprises an acquisition unit and a water pump control unit, wherein:
the acquisition unit is used for acquiring the current state of a water pump in the vehicle;
the water pump control unit is used for controlling the rotating speed of the water pump to be reduced according to the condition that the water inlet pressure value of the water pump is lower than a preset pressure value;
and the fan control unit is used for increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than a preset temperature value.
In another aspect of the present invention, a cooling control system for an engine in a vehicle is provided, the cooling control system including a memory in which instructions related to a cooling control method for the engine in the vehicle are stored, and a cooling control device for the engine in the vehicle;
the water pump and the fan are used for cooling the engine, and a water pressure sensor is arranged at the water inlet end of the water pump.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings.
In the drawings:
fig. 1 schematically shows a flowchart of a cooling control method of an engine in a vehicle according to an embodiment of the invention;
FIG. 2 schematically shows a logic control block diagram of a cooling control method of an engine in a vehicle according to an embodiment of the invention;
FIG. 3 is a flow chart of one embodiment of the embodiment of FIG. 1;
fig. 4 is a block diagram schematically showing a cooling control apparatus of an engine in a vehicle according to an embodiment of the invention;
fig. 5 schematically shows a connection configuration diagram of a cooling control system of an engine in a vehicle according to an embodiment of the present invention.
1: an acquisition unit; 2: a fan control unit; 3: a water pump control unit;
12: a fan; 13: a water pressure sensor; 14: a water pump; 15: an engine; 16: a thermostat.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
A first aspect of the invention proposes a cooling control method of an engine in a vehicle, which is used for engine cooling while preventing cavitation of a water pump.
As shown in fig. 1, the cooling control method of an engine in a vehicle in the present embodiment, wherein the method includes the steps of:
s1, acquiring the current state of a water pump in the vehicle;
s2, controlling the rotating speed of the water pump to be reduced according to the fact that the water inlet pressure value of the water pump is lower than a preset pressure value;
and S3, increasing the rotating speed of the fan according to the fact that the outlet water temperature of the water pump is higher than a preset temperature value.
Wherein, the water pump is the automatically controlled water pump, if not the automatically controlled water pump then the procedure terminates. The water pump is low in water inlet pressure and high in water outlet pressure, the pressure difference between inlet water and outlet water is large, cavitation of the water pump is easily caused, if the water inlet pressure of the water pump is low, the rotating speed of the water pump is controlled to be reduced, the pressure of the outlet water is reduced, and the cavitation of the water pump can be prevented due to the small pressure difference between the inlet water and the outlet water. However, the cooling capacity of the engine is insufficient due to the fact that the water outlet pressure is reduced, and therefore the rotating speed of the fan can be increased according to the fact that the water outlet temperature of the water pump is higher than a preset temperature value. The preset temperature value is the full-open temperature of the thermostat.
The cavitation risk of the water pump is predicted by detecting the water inlet pressure of the water pump, and the water pump is prevented from being damaged by adjusting the rotating speed of the water pump, so that the reliability of an engine is ensured. And increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than the preset temperature value.
As shown in fig. 2 and 3, in some embodiments of the invention, the obtaining the current state of the water pump in the vehicle includes:
s11, judging that the water pump is an electromagnetic water pump;
comparing the current water inlet pressure value of the electromagnetic water pump with a first preset pressure value;
and determining that the water inlet pressure value of the electromagnetic water pump is lower than a first preset pressure value according to the condition that the current water inlet pressure value of the electromagnetic water pump is smaller than the first preset pressure value.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the water inlet pressure value of the water pump being lower than the first preset pressure value includes:
and controlling the electromagnetic water pump in the vehicle to run at half speed according to the full-speed running of the electromagnetic water pump, wherein the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set first duration.
If the electromagnetic clutch water pump is used, when the water inlet pressure of the water pump is smaller than a set value and the first duration exceeds a set duration a, whether the electromagnetic clutch water pump is in a full-speed state or not is judged, if the electromagnetic clutch water pump is in the full-speed state, the half speed of the electromagnetic clutch water pump is controlled, and if the water outlet temperature is higher than the full-open temperature of the thermostat, the rotating speed of a fan is increased in order to meet the heat dissipation requirement of an engine.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the water inlet pressure value of the water pump being lower than the first preset pressure value further includes:
and alarming according to the half-speed operation of the electromagnetic water pump and the fact that the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set second duration, and prompting a driver to check the pressure cover of the expansion water tank.
If the electromagnetic clutch water pump is not in a full-speed state, the electromagnetic clutch water pump is in a half-speed state at the moment, the rotating speed cannot be reduced, and when the water inlet pressure of the electromagnetic clutch water pump is smaller than a set value and the second duration exceeds the set duration b, an alarm is given to remind a driver of checking the pressure cover of the expansion water tank.
When the rotating speed of the water pump can not be adjusted, a driver is reminded to check the pressure cover of the expansion water tank, problems are found in time, and faults are avoided.
In some embodiments of the invention, the obtaining the current state of the water pump in the vehicle comprises:
s12, judging that the water pump is a stepless speed change water pump;
comparing the current water inlet pressure value of the infinitely variable speed water pump with a second preset pressure value;
and determining that the water inlet pressure value of the infinitely variable speed water pump is lower than a second preset pressure value according to the condition that the current water inlet pressure value of the infinitely variable speed water pump is lower than the second preset pressure value. The stepless speed change water pump is an electric control silicon oil pump or a motor water pump.
The preset rotating speed is the lowest rotating speed, the rotating speed of the stepless speed change water pump is not greater than the lowest rotating speed, and the inflow water pressure value of the stepless speed change water pump is determined to be lower than the preset pressure value.
In some embodiments of the invention, the second preset pressure value of the infinitely variable speed water pump is determined according to the current rotating speed of the infinitely variable speed water pump.
And calibrating a second preset pressure value of the infinitely variable speed water pump according to the rotating speed of the water pump.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the fact that the water inlet pressure value of the water pump is lower than the second preset pressure value includes:
and controlling the infinitely variable speed water pump in the vehicle to run at a reduced speed according to the condition that the rotating speed of the infinitely variable speed water pump is greater than the preset rotating speed, and the water inlet pressure value of the water pump is lower than the second preset pressure value, and the duration exceeds the set third duration.
And when the water inlet pressure of the infinitely variable speed water pump is greater than a set value and the third duration exceeds a set duration c, judging whether the infinitely variable speed water pump is at the lowest rotating speed, if not, reducing the rotating speed of the infinitely variable speed water pump, and if the outlet water temperature of the engine is higher than the full-open temperature of the thermostat, increasing the rotating speed of the fan.
In some embodiments of the present invention, the controlling the reduction of the rotation speed of the water pump according to the fact that the water inlet pressure value of the water pump is lower than the second preset pressure value further includes:
and alarming to prompt a driver to check the pressure cover of the expansion water tank according to the condition that the rotating speed of the infinitely variable speed water pump is lower than the preset rotating speed and the duration of the water inlet pressure value of the water pump is lower than the second preset pressure value and exceeds the set fourth duration.
And if the infinitely variable speed water pump is already at the lowest rotating speed, when the water inlet pressure of the infinitely variable speed water pump is smaller than the set value and continues for the fourth time length to exceed d, alarming to remind a driver to check the pressure cover of the expansion water tank.
As shown in fig. 4, another aspect of the present invention also provides a cooling control device for an engine in a vehicle, wherein the cooling control device for an engine in a vehicle is configured to execute the cooling control method for an engine in a vehicle described above, and the cooling control device includes: an acquisition unit 1 and a water pump control unit 3, wherein:
the acquiring unit 1 is used for acquiring the current state of a water pump in a vehicle;
the water pump control unit 3 is used for controlling the rotating speed of the water pump to be reduced according to the condition that the water inlet pressure value of the water pump is lower than a preset pressure value;
and the fan control unit 2 is used for increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than a preset temperature value.
As shown in fig. 5, another aspect of the present invention further provides a cooling control system for an in-vehicle engine 15, the cooling control system including a memory in which instructions related to a cooling control method for the in-vehicle engine are stored, and a cooling control device for the in-vehicle engine 15;
the water cooling system further comprises a water pump 14 and a fan 12, wherein the water pump 14 is used for cooling the engine 15, and a water pressure sensor 13 is arranged at the water inlet end of the water pump 14.
In the cooling control system of the engine 15 in the vehicle provided by the invention, when the water inlet pressure of the water pump 14 is too low, cavitation of the water pump 14 is easily caused, the performance of the water pump 14 is influenced, the cooling capacity of the engine 15 is insufficient, and the reliability of the engine 15 is influenced. In order to solve the problems, the water pressure sensor 13 is arranged at the water inlet of the water pump 14, and when the water inlet pressure of the water pump 14 is too low, the rotating speed of the water pump 14 is reduced, so that the performance of the water pump 14 is protected. Whether to increase the rotation speed of the fan 12 is determined based on the full-open temperature of the thermostat 16 and the temperature of the water discharged from the engine 15.
In conclusion, in the cooling control method for the engine in the vehicle, the rotating speed of the water pump is controlled to be reduced according to the condition that the water inlet pressure value of the water pump is lower than the preset pressure value, so that the cavitation phenomenon of the water pump caused by the over-low water inlet pressure is relieved, meanwhile, the rotating speed of the fan is increased according to the condition that the water outlet temperature of the water pump is higher than the preset temperature value, and the influence of the low rotating speed of the water pump on the cooling effect of the engine is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A cooling control method of an engine in a vehicle, characterized by comprising the steps of:
acquiring the current state of a water pump in a vehicle;
controlling the rotating speed of the water pump to be reduced according to the fact that the water inlet pressure value of the water pump is lower than a preset pressure value;
the acquiring the current state of the water pump in the vehicle comprises the following steps:
judging that the water pump is an electromagnetic water pump or a stepless speed change water pump;
determining a second preset pressure value of the infinitely variable speed water pump according to the current rotating speed of the infinitely variable speed water pump; comparing the current water inlet pressure value of the infinitely variable speed water pump with a second preset pressure value;
determining that the water inlet pressure value of the infinitely variable speed water pump is lower than a second preset pressure value according to the fact that the current water inlet pressure value of the infinitely variable speed water pump is smaller than the second preset pressure value;
and increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than the preset temperature value.
2. The in-vehicle engine cooling control method according to claim 1, wherein the acquiring the current state of the in-vehicle water pump includes:
judging that the water pump is an electromagnetic water pump;
comparing the current water inlet pressure value of the electromagnetic water pump with a first preset pressure value;
and determining that the water inlet pressure value of the electromagnetic water pump is lower than a preset pressure value according to the condition that the current water inlet pressure value of the electromagnetic water pump is smaller than a first preset pressure value.
3. The cooling control method of the engine in the vehicle according to claim 2, characterized in that the controlling of the rotation speed reduction of the water pump in accordance with the water intake pressure value of the water pump being lower than a first preset pressure value includes:
and controlling the electromagnetic water pump in the vehicle to run at half speed according to the full-speed running of the electromagnetic water pump, wherein the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set first duration.
4. The cooling control method of an engine in a vehicle according to claim 2, wherein the controlling of the reduction in the rotation speed of the water pump in accordance with the value of the intake pressure of the water pump being lower than a first preset pressure value further comprises:
and alarming according to the half-speed operation of the electromagnetic water pump and the condition that the duration of the water inlet pressure value of the water pump is lower than a first preset pressure value and exceeds a set second duration.
5. The cooling control method of the engine in the vehicle according to claim 1, wherein the controlling of the rotation speed reduction of the water pump in accordance with the intake water pressure value of the water pump being lower than a second preset pressure value includes:
and controlling the infinitely variable speed water pump in the vehicle to run at a reduced speed according to the condition that the rotating speed of the infinitely variable speed water pump is greater than the preset rotating speed, and the water inlet pressure value of the water pump is lower than the second preset pressure value, and the duration exceeds the set third duration.
6. The cooling control method of an engine in a vehicle according to claim 1, wherein the controlling of the reduction in the rotation speed of the water pump in accordance with the value of the intake water pressure of the water pump being lower than a second preset pressure value further comprises:
and alarming according to the condition that the rotating speed of the infinitely variable speed water pump is lower than the preset rotating speed, and the duration of the water inlet pressure value of the water pump is lower than the second preset pressure value and exceeds the set fourth duration.
7. A cooling control apparatus of an in-vehicle engine for executing the cooling control method of the in-vehicle engine according to claim 1, characterized by comprising: obtain unit, water pump control unit and fan control unit, wherein:
the acquisition unit is used for acquiring the current state of a water pump in the vehicle;
the water pump control unit is used for controlling the rotating speed of the water pump to be reduced according to the condition that the water inlet pressure value of the water pump is lower than a preset pressure value;
and the fan control unit is used for increasing the rotating speed of the fan according to the condition that the outlet water temperature of the water pump is higher than a preset temperature value.
8. A cooling control system of an in-vehicle engine, comprising a memory in which instructions of a cooling control method of an in-vehicle engine according to any one of claims 1 to 6 are stored, and a cooling control apparatus of an in-vehicle engine according to claim 7;
the water pump and the fan are used for cooling the engine, and a water pressure sensor is arranged at the water inlet end of the water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910945550.3A CN110671187B (en) | 2019-09-30 | 2019-09-30 | Cooling control method, control device and control system for engine in vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910945550.3A CN110671187B (en) | 2019-09-30 | 2019-09-30 | Cooling control method, control device and control system for engine in vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110671187A CN110671187A (en) | 2020-01-10 |
| CN110671187B true CN110671187B (en) | 2020-10-30 |
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Family Applications (1)
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| CN111441873A (en) * | 2020-03-31 | 2020-07-24 | 潍柴动力股份有限公司 | Engine control method and device |
| CN112682159B (en) * | 2020-12-23 | 2022-06-28 | 潍柴动力股份有限公司 | Fault diagnosis method for water pump, control method for engine and engine |
| CN113494347B (en) * | 2021-08-09 | 2022-10-18 | 一汽解放汽车有限公司 | Control method of engine cooling system |
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