CN104481668A - Electric water pump temperature control method for intelligent heat management for engine - Google Patents
Electric water pump temperature control method for intelligent heat management for engine Download PDFInfo
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- CN104481668A CN104481668A CN201410561991.0A CN201410561991A CN104481668A CN 104481668 A CN104481668 A CN 104481668A CN 201410561991 A CN201410561991 A CN 201410561991A CN 104481668 A CN104481668 A CN 104481668A
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- delta
- water pump
- engine
- temperature
- tmin
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an electric water pump temperature control method for intelligent heat management for an engine. The electric water pump temperature control method for the intelligent heat management for the engine includes steps that setting delta T as the real-time water temperature difference between an inlet and an outlet of the engine (subtracting the water temperature at the inlet of the engine from the water temperature at the outlet of the engine) under the current working condition, setting delta Tmax-set as the upper limit value of the water temperature difference between the inlet and outlet of the engine set in a water pump control strategy, and setting delta Tmin-set as the lower limit value of the water temperature difference between the inlet and outlet of the engine set in the water pump control strategy; judging temperature under the real-time working condition, to be specific, if delta T is larger than delta Tmax-set, setting the temperature control target of the electric water pump as delta Tmax-set; if delta T is smaller than or equal to delta Tmax-set, further judging whether delta T is smaller than delta Tmin-set, if delta T is smaller than delta Tmin-set, setting the temperature control target of the electric water pump as delta Tmin-set; if delta T is larger than or equal to delta Tmin-set, setting the temperature control target of the electric water pump as delta T. Compared with the prior art, through regulating the water temperature difference between the inlet and outlet of the engine to improve the energy consumption, the rotating speed change frequency of accessories is effectively lowered, and the total energy consumption of the accessories is lowered.
Description
Technical field
The present invention relates to internal-combustion engine control technique field, particularly relate to the electric water pump control strategy in internal-combustion engine Intelligent heat management system.
Background technique
Along with the raising day by day that automotive energy-saving emission-reducing requires, engine thermal management system faces new technological challenge.In conventional engines heat management system, the rotating speed of the annex such as water pump, fan is coupled with engine speed is rigid, and at Part load (under especially high rotating speed, middle-low load), energy consumption waste is serious.For this reason, the Intelligent heat management system being representative with the variable annex such as electric water pump, electric fan causes extensive concern in the industry.
Intelligent heat management system is made up of electronic thermostat, electric water pump, electric fan, radiator of water tank usually, and as shown in Figure 1, wherein energy-consuming parts mainly contains electric water pump and electric fan, is below referred to as annex.Cooling water circulation is divided into large loop and minor loop by electronic thermostat, and large loop refers to that cooling water is after radiator of water tank heat radiation, flows to water pump; Minor loop refers to that cooling water is after electronic thermostat, directly flows to water pump, and without radiator of water tank.One large advantage of Intelligent heat management system achieves the decoupling zero of water pump, rotation speed of the fan and engine crankshaft, makes the import and export water temperature of motor controlled flexibly.The control of general intelligence heat management system, adopt electric fan to control engine export water temperature, electric water pump controls motor and imports and exports the water temperature temperature difference.
At present, the control objectives of research institution to engine export water temperature is had to determine to have done related work, mainly the target outlet water temperature of motor is demarcated and become map (engine speed RPM-fuel injection quantity mg/cycle-engine export water temperature K), or directly control on a certain temperature value, on this basis, in order to ensure thermal equilibrium and the Security of motor, thus motor is imported and exported the water temperature temperature difference and fix on 10K or 8K (engine export water temperature deducts motor inlet water temperature, and engine export water temperature height overall is in motor inlet water temperature).Because the operating conditions change of motor is fast, therefore under this control strategy, the action change of annex is frequent, will shorten the working life of the motor driven.In addition, found by research, on the heat management system being equipped with electric water pump and electric fan: under some operating mode, constant in maintenance engine export water temperature, when ensureing engine thermal safety (namely motor imports and exports the water temperature temperature difference within 8K), by changing the import and export water temperature temperature difference of motor, annex total energy consumption can be made to improve 2%-20%, namely it is not most suitable for keeping the motor import and export water temperature temperature difference to be 10K or 8K, and the total energy consumption that the water temperature temperature difference is conducive to reducing annex imported and exported by reduction motor suitable under some operating mode.
Summary of the invention
In order to overcome the defect that above-mentioned prior art exists, further saving annex energy consumption, the present invention proposes a kind of engine intelligent heat management electric water pump controlling method, the state of the water temperature temperature difference is imported and exported according to current motor, reduce the change frequency of annex rotating speed, reduce the total energy consumption of annex, achieve the strategy of the control objectives determining electric water pump in real time.
The present invention proposes a kind of temperature control method of engine intelligent heat management electric water pump, the method comprises the following steps:
Arranging Δ T is that the water temperature temperature difference imported and exported by motor real-time under motor current working, Δ Tmax_set is that water temperature temperature difference CLV ceiling limit value imported and exported by the motor arranged in water pump control strategy, and Δ Tmin_set is that water temperature temperature difference lower limit imported and exported by the motor arranged in water pump control strategy;
Temperature judgement is carried out to real-time working condition, comprising:
If Δ T > Δ Tmax_set, be then set to Δ Tmax_set by the control target temperature of electric water pump;
If Δ T≤Δ Tmax_set, judge whether Δ T is less than Δ Tmin_set further:
If Δ T < Δ Tmin_set, be then set to Δ Tmin_set by the control target temperature of electric water pump;
If Δ T >=Δ Tmin_set, then the control target temperature of electric water pump is set to equal Δ T.
Compared with prior art, the present invention improves energy consumption by regulating motor to import and export the water temperature temperature difference, effectively reduces the change frequency of annex rotating speed, and the total energy consumption of annex.
Accompanying drawing explanation
Fig. 1 is the structural representation of Intelligent heat management system;
1, motor; 2, turbosupercharger; 3, thermal management controller; 4, frequency variator; 5, fan electromotor; 6, pump motor; 7, water pump; 8, radiator; 9, fan; 10, thermostat;
Fig. 2 is the control logic figure of control strategy.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail, but practical range of the present invention is not limited thereto.
Engine intelligent heat management electric water pump controlling method of the present invention, by real time for electric water pump formulates control objectives, reduces the total energy of annex.As shown in Figure 2: wherein Δ T is that the water temperature temperature difference imported and exported by motor real-time under motor the present situation, Δ Tmax_set is that water temperature temperature difference CLV ceiling limit value imported and exported by the motor arranged in electric water pump control strategy, Δ Tmin_set is that water temperature temperature difference lower limit imported and exported by the motor arranged in electric water pump control strategy, wherein Δ Tmax_set is mainly the hot safety ensureing motor, its setting method, known by Professional visitors, is not stated tired at this.The setting of Δ Tmin_set, mainly through analyze annex energy consumption under different operating mode minimum time corresponding motor import and export the water temperature temperature difference and determine.
Its control logic is as follows:
If Δ T > Δ Tmax_set, be then set to Δ Tmax_set by the control objectives of water pump;
If Δ T < Δ Tmax_set, then carry out next step and judge: whether Δ T is less than Δ Tmin_set;
If Δ T < Δ Tmin_set, be then set to Δ Tmin_set by water pump control objectives;
If Δ T >=Δ Tmin_set, then water pump control objectives is set to equal Δ T.
Through above judgement and after calculating, the control objectives that electric water pump is current can be determined.
Claims (1)
1. a temperature control method for engine intelligent heat management electric water pump, is characterized in that, the method comprises the following steps:
Arranging Δ T is that the water temperature temperature difference (engine export water temperature deducts motor inlet water temperature) imported and exported by motor real-time under motor current working, Δ Tmax_set is that water temperature temperature difference CLV ceiling limit value imported and exported by the motor arranged in water pump control strategy, and Δ Tmin_set is that water temperature temperature difference lower limit imported and exported by the motor arranged in water pump control strategy;
Temperature judgement is carried out to real-time working condition, comprising:
If Δ T > Δ Tmax_set, be then set to Δ Tmax_set by the control target temperature of electric water pump;
If Δ T≤Δ Tmax_set, judge whether Δ T is less than Δ Tmin_set further:
If Δ T < Δ Tmin_set, be then set to Δ Tmin_set by the control target temperature of electric water pump;
If Δ T >=Δ Tmin_set, then the control target temperature of electric water pump is set to equal Δ T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561991.0A CN104481668B (en) | 2014-10-21 | 2014-10-21 | A kind of temperature-controlled process of engine intelligent heat management electric water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561991.0A CN104481668B (en) | 2014-10-21 | 2014-10-21 | A kind of temperature-controlled process of engine intelligent heat management electric water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481668A true CN104481668A (en) | 2015-04-01 |
| CN104481668B CN104481668B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410561991.0A Active CN104481668B (en) | 2014-10-21 | 2014-10-21 | A kind of temperature-controlled process of engine intelligent heat management electric water pump |
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| Country | Link |
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| CN (1) | CN104481668B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112629150A (en) * | 2019-10-09 | 2021-04-09 | 佛山市顺德区美的饮水机制造有限公司 | Water treatment apparatus, control method thereof, and computer-readable storage medium |
| CN114278423A (en) * | 2021-06-28 | 2022-04-05 | 天津大学 | Coolant temperature prediction control algorithm based on predictive extended state observer |
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| CN1950223A (en) * | 2004-05-10 | 2007-04-18 | 丰田自动车株式会社 | Heating control system for vehicle |
| CN103711566A (en) * | 2013-01-23 | 2014-04-09 | 日立汽车部件（苏州）有限公司 | Engine system |
| CN103867283A (en) * | 2014-04-02 | 2014-06-18 | 广西玉柴机器股份有限公司 | Intelligent thermal management system for diesel |
| WO2014097354A1 (en) * | 2012-12-19 | 2014-06-26 | 日野自動車株式会社 | Engine cold start warmup method |
| CN104100351A (en) * | 2013-04-08 | 2014-10-15 | 现代自动车株式会社 | Method for controlling water pump of vehicle and system thereof |
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2014
- 2014-10-21 CN CN201410561991.0A patent/CN104481668B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950223A (en) * | 2004-05-10 | 2007-04-18 | 丰田自动车株式会社 | Heating control system for vehicle |
| WO2014097354A1 (en) * | 2012-12-19 | 2014-06-26 | 日野自動車株式会社 | Engine cold start warmup method |
| CN103711566A (en) * | 2013-01-23 | 2014-04-09 | 日立汽车部件（苏州）有限公司 | Engine system |
| CN104100351A (en) * | 2013-04-08 | 2014-10-15 | 现代自动车株式会社 | Method for controlling water pump of vehicle and system thereof |
| CN103867283A (en) * | 2014-04-02 | 2014-06-18 | 广西玉柴机器股份有限公司 | Intelligent thermal management system for diesel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629150A (en) * | 2019-10-09 | 2021-04-09 | 佛山市顺德区美的饮水机制造有限公司 | Water treatment apparatus, control method thereof, and computer-readable storage medium |
| CN112629150B (en) * | 2019-10-09 | 2022-08-26 | 佛山市顺德区美的饮水机制造有限公司 | Water treatment apparatus, control method thereof, and computer-readable storage medium |
| 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 |
| CN114278423A (en) * | 2021-06-28 | 2022-04-05 | 天津大学 | Coolant temperature prediction control algorithm based on predictive extended state observer |
| CN114278423B (en) * | 2021-06-28 | 2023-10-13 | 天津大学 | Cooling liquid temperature prediction control method based on predictive extended state observer |
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| CN104481668B (en) | 2017-04-05 |
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