CN112483239B - Method and system for controlling rotating speed of electric control water pump of internal combustion engine - Google Patents

Method and system for controlling rotating speed of electric control water pump of internal combustion engine Download PDF

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Publication number
CN112483239B
CN112483239B CN202011395289.3A CN202011395289A CN112483239B CN 112483239 B CN112483239 B CN 112483239B CN 202011395289 A CN202011395289 A CN 202011395289A CN 112483239 B CN112483239 B CN 112483239B
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water pump
combustion engine
internal combustion
temperature
rotating speed
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CN202011395289.3A
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CN112483239A (en
Inventor
陶正科
李伟
黄永仲
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Guangxi Yuchai Marine and Genset Power Co Ltd
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Guangxi Yuchai Machinery Co Ltd
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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
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/30—Engine incoming fluid 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/40—Oil temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a method and a system for controlling the rotating speed of an electronic control water pump of an internal combustion engine, relates to a cooling system of the internal combustion engine, and solves the technical problems that the water pump in the existing internal combustion engine has fixed outflow and can not be adjusted. The method comprises the steps of monitoring the water temperature of the internal combustion engine in real time, comparing the monitored water temperature with a water temperature set value to determine a water temperature set value corresponding to the current water temperature of the internal combustion engine, and enabling the water pump to operate at a calibrated rotating speed corresponding to the water temperature set value according to a comparison result. The invention effectively improves the reliability and the combustion efficiency of the operation of the internal combustion engine, avoids the damage of the internal combustion engine caused by the use of the internal combustion engine under the non-standard condition and ensures that the operation of the internal combustion engine is carried out under the condition of each suitable temperature.

Description

Method and system for controlling rotating speed of electric control water pump of internal combustion engine
Technical Field
The invention relates to a cooling system of an internal combustion engine, in particular to a method and a system for controlling the rotating speed of an electronic control water pump of the internal combustion engine.
Background
There may be cases where the temperature of the cooling water is low immediately after the internal combustion engine is started, particularly in cold winter. Too low a water temperature may affect the lubrication capability of the engine and the efficiency of the charge air intercooler and thus the engine operating performance. In addition, the internal combustion engine generates a large amount of heat during the continuous operation, and a large part of the heat is taken away by the cooling water, so that the water temperature of the internal combustion engine rises, and therefore the cooling water needs to be cooled to ensure the cooling effect of the cooling water on the internal combustion engine, so that the internal combustion engine works in a reliable state. In summary, the running performance of the internal combustion engine is affected by the temperature of the cooling water in the internal combustion engine being too low or too high. Therefore, the reasonable control of the water temperature of the inlet and the outlet of the internal combustion engine is an effective way for improving the comprehensive performance of the internal combustion engine, and the water temperature control process of the internal combustion engine is closely related to the water pump of the internal combustion engine.
The existing internal combustion engine outputs power to a water pump by means of mechanical transmission so as to enable the water pump to run, and therefore the rotating speed of the water pump and the rotating speed of the internal combustion engine form a certain direct proportional relation. However, the water pump cannot automatically adjust the rotating speed of the water pump according to the water temperature, namely the flow of the water pump is fixed, and the water temperature of the cooling water cannot be controlled through the water flow by changing the water flow of the water pump.
Disclosure of Invention
The invention provides a method and a system for controlling the rotating speed of an electric control water pump of an internal combustion engine, aiming at the defects of the prior art, and solving the problems that the water pump flow in the current internal combustion engine is fixed and cannot be adjusted.
The invention discloses a control method for the rotating speed of an electric control water pump of an internal combustion engine, which monitors the water temperature of the internal combustion engine in real time, compares the monitored water temperature with a set water temperature value to determine a set water temperature value corresponding to the current water temperature of the internal combustion engine, and enables the water pump to operate at a calibrated rotating speed corresponding to the set water temperature value according to a comparison result.
The method is further improved, the inlet air temperature of the internal combustion engine is monitored in real time, the monitored inlet air temperature is compared with the air temperature risk value, and when the inlet air temperature is equal to or greater than the air temperature risk value, the water pump runs at the maximum calibration rotating speed; and when the inlet air temperature is lower than the air temperature risk value, the water pump operates at the calibrated rotating speed corresponding to the current water temperature.
Further, the engine oil temperature of the internal combustion engine is monitored in real time, the monitored engine oil temperature is compared with the oil temperature risk value, and when the engine oil temperature is equal to or greater than the oil temperature risk value, the water pump operates at the maximum calibration rotating speed; and when the temperature of the engine oil is less than the risk value of the engine oil, the water pump operates at the calibrated rotating speed corresponding to the current water temperature.
Furthermore, the current rotating speed of the water pump and the current flow of the water outlet end of the water pump are monitored in real time, and when the current flow is smaller than the calibrated flow corresponding to the calibrated rotating speed, a corrected rotating speed is superposed for the water pump, so that the outlet flow of the water pump meets the heat dissipation requirement.
Further, the corrected rotation speed is determined by the following formula:
Q add ＝V t ×(Q 0 2 /Q t 2 -1)；
wherein, V add To correct the rotation speed; v t For current speed or calibrationA rotational speed; q 0 To calibrate the flow; q t Is the current flow rate.
The invention discloses a control system for the rotating speed of an internal combustion engine electric control water pump, which comprises a water pump control module, a water pump rotating speed monitoring module, an internal combustion engine air inlet temperature monitoring module, an internal combustion engine oil temperature monitoring module, an internal combustion engine water temperature monitoring module, a water pump water outlet pressure monitoring module and a water pump water outlet flow monitoring module, wherein the internal combustion engine air inlet temperature monitoring module, the internal combustion engine oil temperature monitoring module and the internal combustion engine water temperature monitoring module are all electrically connected with an internal combustion engine ECU (electronic control Unit), the internal combustion engine ECU is electrically connected with the water pump control module, and the water pump rotating speed monitoring module, the water pump water outlet pressure monitoring module and the water pump water outlet flow monitoring module are all electrically connected with the water pump control module.
The control system for the rotating speed of the internal combustion engine electric control water pump realizes the control method for the rotating speed of the internal combustion engine electric control water pump.
Advantageous effects
The invention has the advantages that: the control of the rotating speed of the water pump is realized by monitoring the water temperature, the air inlet temperature and the oil temperature of the internal combustion engine, the running reliability and the combustion efficiency of the internal combustion engine are effectively improved, the internal combustion engine is prevented from being damaged due to the fact that the internal combustion engine is used under the non-standard condition, and the running of the internal combustion engine is ensured under the condition of each suitable temperature.
Drawings
FIG. 1 is a block diagram of the present invention.
Detailed Description
The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.
The invention relates to a method for controlling the rotating speed of an electronic control water pump of an internal combustion engine, which monitors the water temperature of the internal combustion engine in real time, compares the monitored water temperature with a set water temperature value to determine a set water temperature value corresponding to the current water temperature of the internal combustion engine, and enables the water pump to operate at a calibrated rotating speed corresponding to the set water temperature value according to a comparison result. The rotating speed of the water pump is determined according to the water temperature of the internal combustion engine, so that the water pump runs at the corresponding rotating speed, the function of matching different rotating speeds of the water pump according to different working conditions of the internal combustion engine is achieved, and the efficiency, reliability, economy and intelligence of the internal combustion engine are improved.
Monitoring the intake temperature of the internal combustion engine in real time, comparing the monitored intake temperature with an air temperature risk value, and when the intake temperature is equal to or greater than the air temperature risk value, operating the water pump at the maximum calibration rotating speed; and when the inlet air temperature is lower than the air temperature risk value, the water pump operates at the calibrated rotating speed corresponding to the current water temperature. In addition, the engine oil temperature of the internal combustion engine is monitored in real time, the monitored engine oil temperature is compared with the oil temperature risk value, and when the engine oil temperature is equal to or greater than the oil temperature risk value, the water pump operates at the maximum calibration rotating speed; and when the temperature of the engine oil is less than the risk value of the engine oil, the water pump operates at the calibrated rotating speed corresponding to the current water temperature. The water temperature is monitored, the air inlet temperature and the engine oil temperature of the internal combustion engine are monitored, and when the air temperature and the oil temperature exceed the risk values, the water pump controls the temperature of the internal combustion engine in a fast and efficient working state to enable the internal combustion engine to work in a proper temperature range all the time, so that the running reliability and the combustion efficiency of the internal combustion engine are further improved, the internal combustion engine is prevented from being damaged due to the fact that the internal combustion engine is used under the non-standard condition, and the running of the internal combustion engine is guaranteed to be carried out under the condition of proper temperature.
Preferably, the current rotating speed of the water pump, the current flow and the current pressure of the water outlet end of the water pump are monitored in real time, and when the current flow of the water pump is smaller than the calibrated flow corresponding to the calibrated rotating speed, a corrected rotating speed is superposed for the water pump, so that the outlet flow of the water pump meets the heat dissipation requirement. During the operation of the water pump, the rotating speed of the water pump is in direct proportion to the flow, namely the flow is larger when the rotating speed is larger. However, in the process of operation of the water pump, the water pump is aged along with the abrasion inside the water pump, or the water flow is backwashed, or bubbles are entrained in the water flow, and the like, so that the flow of the water pump cannot meet the calibration requirement. For the situation, the current flow of the water pump is monitored in real time, a correction rotating speed is introduced according to the current flow, and when the outflow of the water pump does not meet the calibration requirement, the correction rotating speed is superposed on the current rotating speed of the water pump, so that the outflow of the water pump meets the design requirement, and the thermal efficiency of the internal combustion engine is improved better.
Specifically, the corrected rotation speed is determined by the following formula:
Q add ＝V t ×(Q 0 2 /Q t 2 -1)。
wherein, V add To correct the rotation speed; v t The current rotating speed or the calibrated rotating speed is obtained; q 0 To calibrate the flow; q t Is the current flow rate.
Preferably, when the current flow of the water pump is monitored to be smaller than the calibration flow, after the water pump runs at the current rotating speed for a set time, if the current flow of the water pump is still smaller than the calibration flow, the rotating speed of the water pump is corrected. By the mode, the problem that the rotating speed of the water pump is frequently corrected by a control system due to the fact that the output flow of the water pump changes in a short time can be solved. Specifically, the setting time may be set to be between 3s and 10 s.
Referring to fig. 1, a control system for the rotation speed of an internal combustion engine electric control water pump is used for realizing a control method for the rotation speed of the internal combustion engine electric control water pump. The control system comprises a water pump control module, a water pump rotating speed monitoring module, an internal combustion engine air inlet temperature monitoring module, an internal combustion engine oil temperature monitoring module, an internal combustion engine water temperature monitoring module, a water pump water outlet pressure monitoring module and a water pump water outlet flow monitoring module. Internal-combustion engine intake temperature monitoring module, internal-combustion engine oil temperature monitoring module, internal-combustion engine water temperature monitoring module all with internal-combustion engine ECU electric connection, internal-combustion engine ECU and water pump control module electric connection, water pump rotational speed monitoring module, water pump play water pressure monitoring module, water pump play water flow monitoring module all with water pump control module electric connection.
The water pump control module is a water pump controller and is used for controlling the rotating speed of the water pump. The water pump rotating speed monitoring module is a rotating speed sensor and is used for monitoring the rotating speed of the water pump. The internal combustion engine intake temperature monitoring module is a temperature sensor located in an intake manifold and used for monitoring the intake temperature of the internal combustion engine. The internal combustion engine oil temperature monitoring module is a temperature sensor positioned on an oil return pipe of an oil pan and used for detecting the temperature of engine oil. The water temperature monitoring module of the internal combustion engine is a temperature sensor positioned on a water outlet pipe of the internal combustion engine and used for detecting the water temperature of the internal combustion engine. The water pump outlet pressure monitoring module is a pressure sensor and is used for detecting the water pump outlet pressure. The water outlet flow monitoring module of the water pump is a flow sensor and is used for detecting the water outlet flow of the water pump.
Preferably, the control system further comprises a water pump display module, and the water pump display module is electrically connected with the water pump control module. The water pump display module is used for displaying information such as the rotating speed, the water outlet pressure and the water outlet flow of the water pump, so that a user can know the working state of the water pump in detail and comprehensively.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the invention, which will not affect the effect of the invention and the practicability of the patent.

Claims (4)

1. A control method for the rotating speed of an electric control water pump of an internal combustion engine is characterized by monitoring the water temperature of the internal combustion engine in real time, comparing the monitored water temperature with a set water temperature value to determine a set water temperature value corresponding to the current water temperature of the internal combustion engine, and enabling the water pump to operate at a calibrated rotating speed corresponding to the set water temperature value according to a comparison result;
monitoring the current rotating speed of the water pump and the current flow of the water outlet end of the water pump in real time, and when the current flow is smaller than the calibration flow relative to the calibration rotating speed, superposing a correction rotating speed for the water pump so as to enable the outlet flow of the water pump to meet the heat dissipation requirement;
the corrected speed is determined by the following formula:
V add ＝V t ×(Q 0 2 /Q t 2 -1)；
wherein, V add To correct the rotation speed; v t The current rotating speed or the calibrated rotating speed is obtained; q 0 To calibrate the flow; q t Is the current flow rate.
2. The method for controlling the rotating speed of the electric control water pump of the internal combustion engine according to claim 1, wherein the intake temperature of the internal combustion engine is monitored in real time, the monitored intake temperature is compared with an air temperature risk value, and when the intake temperature is equal to or greater than the air temperature risk value, the water pump is operated at the maximum calibration rotating speed; and when the inlet air temperature is lower than the air temperature risk value, the water pump operates at the calibrated rotating speed corresponding to the current water temperature.
3. The method for controlling the rotating speed of the electric control water pump of the internal combustion engine according to claim 1, wherein the oil temperature of the internal combustion engine is monitored in real time, the monitored oil temperature is compared with the oil temperature risk value, and when the oil temperature is equal to or greater than the oil temperature risk value, the water pump is operated at the maximum calibration rotating speed; and when the temperature of the engine oil is less than the risk value of the engine oil, the water pump operates at the calibrated rotating speed corresponding to the current water temperature.
4. A control system for the rotating speed of an electric control water pump of an internal combustion engine is characterized by comprising a water pump control module, a water pump rotating speed monitoring module, an internal combustion engine air inlet temperature monitoring module, an internal combustion engine oil temperature monitoring module, an internal combustion engine water temperature monitoring module, a water pump water outlet pressure monitoring module and a water pump water outlet flow monitoring module, wherein the internal combustion engine air inlet temperature monitoring module, the internal combustion engine oil temperature monitoring module and the internal combustion engine water temperature monitoring module are electrically connected with an internal combustion engine ECU (electronic control Unit), the internal combustion engine ECU is electrically connected with the water pump control module, and the water pump rotating speed monitoring module, the water pump water outlet pressure monitoring module and the water pump water outlet flow monitoring module are electrically connected with the water pump control module;
the control system for the rotation speed of the internal combustion engine electric control water pump realizes the control method according to any one of claims 1-3.
CN202011395289.3A 2020-12-01 2020-12-01 Method and system for controlling rotating speed of electric control water pump of internal combustion engine Active CN112483239B (en)

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CN112483239B true CN112483239B (en) 2022-09-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306535A (en) * 2022-10-12 2022-11-08 潍柴动力股份有限公司 Control method and device for speed-regulating water pump, electronic equipment and storage medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2712720B2 (en) * 1989-03-07 1998-02-16 株式会社デンソー Cooling method of internal combustion engine
KR101655592B1 (en) * 2014-12-04 2016-09-08 현대자동차주식회사 Method for cooling water control of vehicle
CN104533592B (en) * 2014-12-17 2017-02-22 安徽安凯汽车股份有限公司 Engine cooling system control method for passenger car
CN108843548B (en) * 2018-05-28 2020-04-03 北京长城华冠汽车科技股份有限公司 State monitoring method and device for heat management loop of pure electric vehicle
CN110685788A (en) * 2019-09-26 2020-01-14 中国重汽集团济南动力有限公司 Electric control water pump control device and method for diesel engine
CN111561381A (en) * 2020-04-20 2020-08-21 中国第一汽车股份有限公司 Intelligent closed-loop control heat management method for gasoline engine based on electric water pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306535A (en) * 2022-10-12 2022-11-08 潍柴动力股份有限公司 Control method and device for speed-regulating water pump, electronic equipment and storage medium

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Effective date of registration: 20230109

Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region

Patentee after: Guangxi Yuchai Ship Electric Power Co.,Ltd.

Address before: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region

Patentee before: Guangxi Yuchai Machinery Co.,Ltd.

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