CN105370376A - Diesel engine cooling system for construction machinery and control method of diesel engine cooling system - Google Patents
Diesel engine cooling system for construction machinery and control method of diesel engine cooling system Download PDFInfo
- Publication number
- CN105370376A CN105370376A CN201510989453.6A CN201510989453A CN105370376A CN 105370376 A CN105370376 A CN 105370376A CN 201510989453 A CN201510989453 A CN 201510989453A CN 105370376 A CN105370376 A CN 105370376A
- Authority
- CN
- China
- Prior art keywords
- diesel engine
- radiator
- cooling system
- thermal accumulator
- cooling water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F01P3/00—Liquid cooling
- F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
-
- 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
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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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
- F01P3/00—Liquid cooling
- F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
- F01P2003/182—Arrangements or mounting of liquid-to-air heat-exchangers with multiple heat-exchangers
-
- 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
- F01P3/00—Liquid cooling
- F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
- F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel
-
- 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
- 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
- F01P2011/205—Indicating devices; Other safety devices using heat-accumulators
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/18—Heater
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a diesel engine cooling system for construction machinery and a control method of the diesel engine cooling system. The cooling system comprises coolers, a cooling water incoming pipe and a cooling water outgoing pipe, wherein the cooling water incoming pipe is connected with water inlets of the coolers, and the cooling water outgoing pipe is connected with water outlets of the coolers; the cooling system further comprises a heat accumulator and an electric control adjusting valve; two ends of the heat accumulator are connected with the cooling water incoming pipe and the cooling water outgoing pipe respectively and are in parallel connection with the coolers; the electric control adjusting valve is arranged on a branch of the heat accumulator. The cooling system responds in a timely, reliable and controlled manner, and a diesel engine has no overheating risks; a refrigerant can be heated by the heat accumulator when the diesel engine is started, so that the diesel engine is warmed quickly, and cold machine running abrasion is reduced.
Description
Technical field
The present invention relates to technical field of engineering machinery, especially relate to a kind of industrial diesel engine cooling system and controlling method thereof.
Background technique
During diesel engine operation at part load, especially when middle and slow speed of revolution operation at part load, heat load is lower, and in cylinder, each part surface temperature is in lower state, and at this moment the throttle control device of liquid circulation works, to keep certain coolant temperature.
When diesel engine open out improves output, need certain hour because return water temperature raises response, and sensor actuation sensitivity factor, water circulation throttle valve opening has delayed response.But, radiator cooling fan is coupled with diesel engine rotating shaft by fluid clutch, and by the diabatic process of ambient air to radiator wall, the convection transfer rate of air side is topmost restraining factors, so do not have significant effective to improve (being in this state in a lot of situation) under with the operating mode prerequisite meeting the cooling requirements that load increases at diesel engine speed (rotation speed of the fan), simple increasing throttle valve opening promotes quantity of circulating water, actually do not have real effect, in cylinder of diesel engine, each part surface temperature may be overheated.
Overheated in order to prevent at present, adopt relatively low cooling liquid design temperature (75 DEG C ~ 80 DEG C), make diesel engine adapt to the requirement of load variations.But cause: the radiator heat transfer temperature difference reduces, and needs more number of transfer units, means the rising of radiation fan energy consumption and the consumption of material; The average heat dissipating capacity of diesel engine rises, and the thermal efficiency reduces, and oil consumption increases; Due to the design of larger heat-sink unit number, when diesel engine speed response improves, throttle valve reduces aperture again, the cooling power part waste of fan.
Summary of the invention
Not enough for prior art, technical problem to be solved by this invention is to provide a kind of industrial diesel engine cooling system and controlling method thereof, does not have overheated risk, and can make the object of diesel engine rapid warming-up to reach diesel engine.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of industrial diesel engine cooling system, comprise radiator, cooling water flow water inlet pipe, cooling water flow outlet pipe, described cooling water flow water inlet pipe is connected with the water intake of radiator, described cooling water flow outlet pipe is connected with the water outlet of radiator, also comprise thermal accumulator and electric controlled regulating valve, described thermal accumulator two ends are connected with cooling water flow water inlet pipe and cooling water flow outlet pipe respectively, and radiator forms parallel connection; Described electric controlled regulating valve is located on the branch road of thermal accumulator.
Described radiator comprises two radiators be arranged in parallel I and radiator II, and radiator II is between radiator I and thermal accumulator, and the connecting pipeline between the water intake of radiator I and the water intake of radiator II is provided with electric-control stop valve.
Described thermal accumulator is PCM thermal accumulator.
Heat-accumulating material phase transition temperature in described thermal accumulator is at 60-70 DEG C.
The branch road of described thermal accumulator is provided with recycle pump.
The controlling method of this project machinery diesel engine cooling system, comprises following:
During diesel engine high load running, electric-control stop valve is opened, and electric controlled regulating valve is according to Load Regulation aperture, and part cooling water is by thermal accumulator, and by thermal accumulator supplement heat rejecter, chilling temperature reduces.
When diesel engine middle-low load runs, the fan coupling of radiator, electric-control stop valve is closed, and cooling water is by radiator I; Electric controlled regulating valve standard-sized sheet, recycle pump work, thermal accumulator cooling regenerative cycle.
When diesel engine middle-low load runs, when the fan of radiator is not coupled, electric-control stop valve is opened, and electric controlled regulating valve regulates aperture, and thermal accumulator is as cooling unit.
During diesel engine starting, electric-control stop valve and electric controlled regulating valve are opened, recycle pump work, and thermal accumulator, as thermal source, heats up for engine warming up.
The present invention compared with prior art, has the following advantages:
1, cooling system response is timely, reliable, controlled, and diesel engine does not have overheated risk;
2, because average design water temperature increases, and the heat radiation temperature difference of air rises, and required number of transfer units reduces, and cooling fan energy consumption reduces, radiator volume reduces, and promotes engine fuel economy;
3, diesel engine middle-low load coolant temperature rises, and the diesel engine thermal efficiency improves;
4, during diesel engine high load, coolant temperature reduces, and crucial heated component better reliability, can increase the service life;
5, can be that cooling liquid is heated by thermal accumulator when diesel engine starting, make diesel engine rapid warming-up, reduce cold service wear.
Accompanying drawing explanation
Below the content expressed by each width accompanying drawing of this specification and the mark in figure are briefly described:
Fig. 1 is cooling system schematic diagram of the present invention.
In figure: 1. radiator I, 2. radiator II, 3. thermal accumulator, 4. recycle pump, 5. electric controlled regulating valve, 6. electric-control stop valve.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, this project machinery diesel engine cooling system, comprise radiator, cooling water flow water inlet pipe, cooling water flow outlet pipe, thermal accumulator 3, electric controlled regulating valve 5 and electric-control stop valve 6, wherein, cooling water flow water inlet pipe is connected with the water intake of radiator, cooling water flow outlet pipe is connected with the water outlet of radiator, the import of thermal accumulator is connected with cooling water flow water inlet pipe, the outlet of thermal accumulator is connected with cooling water flow outlet pipe, thermal accumulator and radiator form parallel connection, and electric controlled regulating valve is located on the branch road of thermal accumulator.
Radiator comprises two radiators be arranged in parallel I 1 and radiator II 2, and radiator II 2 is between radiator I 1 and thermal accumulator 3, and the connecting pipeline between the water intake of radiator I and the water intake of radiator II is provided with electric-control stop valve.
Radiator I and radiator II and thermal accumulator three parallel connection form cooling system, and the branch road of thermal accumulator is provided with recycle pump; Thermal accumulator is between electric controlled regulating valve and recycle pump, and electric controlled regulating valve is connected with cooling water flow water inlet pipe, and recycle pump 4 is connected with cooling water flow outlet pipe.
Thermal accumulator 3 is PCM thermal accumulator, is convenient to control.Heat-accumulating material phase transition temperature in thermal accumulator is between 60-70 DEG C, and design parameter can be determined by application demand.
To the extra cooling of 5 of cooling liquid DEG C ~ 10 DEG C when thermal accumulator is in order to provide load to rise, and deactivate when rotation speed of the fan reaches requirement.Simulated and verification experimental verification by principle simulation calculation, find, when cooling liquid design temperature rise height is to 90-95 degree, for diesel engine sub load advantageously, Part temperature can be made to be unlikely to too low, improve lubricating efficiency and combustion efficiency; When load strengthens, control signal by ECU, get involved thermal accumulator in time to diesel engine cooling liquid temp supplement heat rejecter, make cooling liquid temperature decline 5 DEG C ~ 10 DEG C, can the requirement of load-responsive change to cooling system effectively rapidly.Diesel engine middle-low load adopts higher cooling liquid temperature, and high load adopts slightly low cooling liquid temperature, and its temperature response is not by the instant influence of rotation speed of diesel engine, safer reliable, controlled.
The concrete controlling method of this project machinery diesel engine cooling system, comprises following:
During diesel engine high load running, electric-control stop valve is opened, and electric controlled regulating valve is according to Load Regulation aperture, and part cooling water is by thermal accumulator, and by thermal accumulator supplement heat rejecter, chilling temperature reduces, and provide low and be combined into coolant-temperature gage, diesel engine does not have overheated risk.
When diesel engine middle-low load runs, the fan coupling of radiator, electric-control stop valve is closed, and cooling water is by radiator I; Electric controlled regulating valve standard-sized sheet, recycle pump work, thermal accumulator cooling regenerative cycle.
When diesel engine middle-low load runs, when the fan of radiator is not coupled, electric-control stop valve is opened, and electric controlled regulating valve regulates aperture, and thermal accumulator is as cooling unit; It can be divided into again both recycle pump work or closedown situation.
During diesel engine starting, electric-control stop valve and electric controlled regulating valve are opened, recycle pump work, and thermal accumulator, as thermal source, heats up for engine warming up, provides about 60 DEG C hot water, make diesel engine rapid warming-up, reduces cold service wear.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that design of the present invention and technological scheme are carried out; or design of the present invention and technological scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (9)
1. an industrial diesel engine cooling system, comprise radiator, cooling water flow water inlet pipe, cooling water flow outlet pipe, described cooling water flow water inlet pipe is connected with the water intake of radiator, described cooling water flow outlet pipe is connected with the water outlet of radiator, it is characterized in that: also comprise thermal accumulator and electric controlled regulating valve, described thermal accumulator two ends are connected with cooling water flow water inlet pipe and cooling water flow outlet pipe respectively, and radiator forms parallel connection; Described electric controlled regulating valve is located on the branch road of thermal accumulator.
2. industrial diesel engine cooling system as claimed in claim 1, it is characterized in that: described radiator comprises two radiators be arranged in parallel I and radiator II, radiator II is between radiator I and thermal accumulator, and the connecting pipeline between the water intake of radiator I and the water intake of radiator II is provided with electric-control stop valve.
3. industrial diesel engine cooling system as claimed in claim 1, is characterized in that: described thermal accumulator is PCM thermal accumulator.
4. industrial diesel engine cooling system as claimed in claim 1, is characterized in that: the heat-accumulating material phase transition temperature in described thermal accumulator is at 60-70 DEG C.
5. industrial diesel engine cooling system as claimed in claim 2, is characterized in that: the branch road of described thermal accumulator is provided with recycle pump.
6. the controlling method of an industrial diesel engine cooling system as claimed in claim 5, it is characterized in that: described controlling method is, during diesel engine high load running, electric-control stop valve is opened, electric controlled regulating valve is according to Load Regulation aperture, part cooling water is by thermal accumulator, and by thermal accumulator supplement heat rejecter, chilling temperature reduces.
7. a controlling method for industrial diesel engine cooling system as claimed in claim 5, is characterized in that: described controlling method is, when diesel engine middle-low load runs, and the fan coupling of radiator, electric-control stop valve is closed, and cooling water is by radiator I; Electric controlled regulating valve standard-sized sheet, recycle pump work, thermal accumulator cooling regenerative cycle.
8. a controlling method for industrial diesel engine cooling system as claimed in claim 5, is characterized in that: described controlling method is, when diesel engine middle-low load runs, when the fan of radiator is not coupled, electric-control stop valve is opened, and electric controlled regulating valve regulates aperture, and thermal accumulator is as cooling unit.
9. a controlling method for industrial diesel engine cooling system as claimed in claim 5, is characterized in that: described controlling method is, during diesel engine starting, electric-control stop valve and electric controlled regulating valve are opened, recycle pump works, and thermal accumulator, as thermal source, heats up for engine warming up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989453.6A CN105370376A (en) | 2015-12-24 | 2015-12-24 | Diesel engine cooling system for construction machinery and control method of diesel engine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989453.6A CN105370376A (en) | 2015-12-24 | 2015-12-24 | Diesel engine cooling system for construction machinery and control method of diesel engine cooling system |
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| CN105370376A true CN105370376A (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510989453.6A Pending CN105370376A (en) | 2015-12-24 | 2015-12-24 | Diesel engine cooling system for construction machinery and control method of diesel engine cooling system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804852A (en) * | 2016-04-15 | 2016-07-27 | 金玮 | Novel internal combustion engine cooling system and control method thereof |
| CN109555756A (en) * | 2018-12-11 | 2019-04-02 | 中国铁建重工集团有限公司 | Development machine and its development machine cooling system |
| CN109652025A (en) * | 2018-11-13 | 2019-04-19 | 安徽大学 | A kind of intelligent coolant liquid of engine |
| CN112303064A (en) * | 2020-10-30 | 2021-02-02 | 中煤科工集团西安研究院有限公司 | Diesel engine and hydraulic system composite temperature control system and method |
| CN112459889A (en) * | 2020-11-25 | 2021-03-09 | 东风汽车集团有限公司 | Engine cooling system and control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804852A (en) * | 2016-04-15 | 2016-07-27 | 金玮 | Novel internal combustion engine cooling system and control method thereof |
| CN109652025A (en) * | 2018-11-13 | 2019-04-19 | 安徽大学 | A kind of intelligent coolant liquid of engine |
| CN109555756A (en) * | 2018-12-11 | 2019-04-02 | 中国铁建重工集团有限公司 | Development machine and its development machine cooling system |
| CN112303064A (en) * | 2020-10-30 | 2021-02-02 | 中煤科工集团西安研究院有限公司 | Diesel engine and hydraulic system composite temperature control system and method |
| CN112459889A (en) * | 2020-11-25 | 2021-03-09 | 东风汽车集团有限公司 | Engine cooling system and control method thereof |
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Application publication date: 20160302 |