CN104011343A - Arrangement and method for cooling of coolant in cooling system in vehicle - Google Patents

Arrangement and method for cooling of coolant in cooling system in vehicle Download PDF

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Publication number
CN104011343A
CN104011343A CN201280062826.XA CN201280062826A CN104011343A CN 104011343 A CN104011343 A CN 104011343A CN 201280062826 A CN201280062826 A CN 201280062826A CN 104011343 A CN104011343 A CN 104011343A
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CN
China
Prior art keywords
cooling
cooling circuit
freezing mixture
radiator
temperature
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.)
Pending
Application number
CN201280062826.XA
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Chinese (zh)
Inventor
Z·卡多斯
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Scania CV AB
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Scania CV AB
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Filing date
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Application filed by Scania CV AB filed Critical Scania CV AB
Publication of CN104011343A publication Critical patent/CN104011343A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • 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
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • 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
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • 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
    • F01P2060/06—Retarder
    • 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
    • F01P2060/14—Condenser

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention relates to an arrangement and method for cooling of coolant in a cooling system in a vehicle. The cooling system comprises a first cooling circuit comprising a first coolant pump (11) to circulate coolant through the first cooling circuit, a first radiator (13) to cool the coolant, and a thermostat (12) which opens to direct coolant to the first radiator (13) when the coolant is above the thermostat's regulating temperature (t2), and a second cooling circuit which comprises a second radiator (20) for cooling of coolant. The cooling system comprises flow means (23, 29) adapted to transferring a portion of coolant from the first cooling circuit to the second cooling circuit so that this portion of the coolant is cooled in the second radiator (20) when the coolant in the first cooling circuit is within a temperature range defined by a lowest temperature (t1) at which the coolant initially needs cooling and a highest temperature which is equal to the thermostat's regulating temperature (t2).

Description

Freezing mixture in cooling system in vehicle is carried out to cooling equipment and method
Technical field
The present invention relates to according to the preamble of claim 1 and 11, for the freezing mixture in vehicle cooling system, carry out cooling equipment and method.
Background technique
Need to be in common operating temperature within the scope of 80-90 ℃ for internal combustion engine in vehicle being carried out to the freezing mixture of cooling cooling system.Cooling system generally includes the thermostat that regulates coolant temperature in cooling system.At thermostat, find under the operational circumstances of freezing mixture lower than desired operation temperature, thermostat will be in closed condition, thereby freezing mixture is not having to be directed to motor cooling in the situation that.At thermostat, find that freezing mixture inserts following serviceability higher than the operational circumstances of desired operation temperature by thermostat, under described serviceability, thermostat guides to freezing mixture for cooling radiator before postbacking motivation freezing mixture is directed.Radiator is usually located in the front section of vehicle, in described front section, by forced to carry out cooling through the air of radiator to freezing mixture by radiation fan.Freezing mixture in the cooling system of heavy vehicle is carried out to cooling radiator will be had large cooling capacity and therefore obtain quite expensive.
Traditional thermostat suddenly switches in off position and between open mode, makes radiator and linkage unit in cooling system bear very fast temperature change, and described temperature change causes large thermal stress to radiator material.Radiator and linkage unit can a moment be exposed in the winter time can be extremely low ambient temperature, but this moment after, when thermostat is opened, be exposed at once the temperature of approximately 100 ℃ and in a large number warm circulate coolant pass through radiator and linkage unit.Problem especially starts in the temperature of freezing mixture in the situation that vibrate and occur near the adjusting temperature of thermostat, and the situation that radiator bears large thermal stress very is continually very easy to shorten the working life of described radiator.Depending primarily on it working life of radiator is warmed and cooling how many times.
Summary of the invention
The object of the invention is to propose a kind of cooling system in vehicle, the risk that it reduces the frequent risk opening and closing of thermostat and the radiator in thing followed cooling system frequently bears large thermal stress.
Above object realizes by the cooling system limiting in claim 1 characteristic.According to cooling system of the present invention thereby comprise the second cooling circuit with the second radiator.When the freezing mixture in the first cooling circuit reaches the initial temperature that it initially need to be cooled, a part for freezing mixture is directed to the second cooling circuit, and in described the second cooling circuit, this portion cooling agent is cooled in the second radiator.Thermostat cuts out, thereby the part that is not directed to the second cooling circuit of freezing mixture is not born cooling.The second radiator can have compares the cooling capacity that the first radiator is lower.When directed time the first cooling circuit of the freezing mixture being cooled in the second radiator, this portion cooling agent mixes with the freezing mixture not being cooled in the first cooling circuit.The freezing mixture being cooled in the second radiator, with respect to by coolant cools to starting at first lower than described freezing mixture for the temperature of the initial temperature that is cooled, be more coolant temperature in the first cooling circuit to be raise slow down.Coolant temperature in the first cooling circuit thereby be prevented from vibrating about initial temperature.Therefore the second radiator is intermittently guided to the caused thermal stress of the second cooling circuit by not bearing continually by the freezing mixture warming up from the first cooling circuit.In this serviceability, thereby do not have freezing mixture will be directed to the first radiator, therefore described the first radiator can not bear by fast temperature and change the thermal stress causing.
The second radiator thereby be used to regulate the temperature of freezing mixture in the scope that regulates temperature from initial temperature to thermostat.If freezing mixture little by little warms to the corresponding temperature of adjusting temperature with thermostat, thermostat just by open and the first cooling circuit in freezing mixture will automatically be guided to the first radiator.Thermostat is compared traditional cooling system at this and is had higher adjusting temperature.At this quite high temperature, described thermostat unlikely starts to open and close continually.If thermostat is done like this, can also adjust the coolant temperature in the first cooling circuit by means of the second radiator.
According to a preferred embodiment of the invention, described flow device comprises control valve unit, described control valve unit guides to second cooling circuit by freezing mixture from the first cooling circuit in primary importance, and prevents that in the second place freezing mixture is through flowing to the second cooling circuit from the first cooling circuit.Control valve unit can simply and rapidly switch between described two positions.Advantageously, control valve unit can be three-way valve.Described flow device advantageously also comprises control unit, during the information of the temperature that described control unit is suitable for receiving the freezing mixture in the first cooling circuit at it in described temperature range, control valve unit is inserted to primary importance.Control unit can be the computer unit that band is useful on the applicable software of this object.Control unit is advantageously suitable for receiving the information from temperature transducer, the temperature of described temperature sensor monitors freezing mixture of a certain position in the first cooling circuit.Sensor can for example monitor freezing mixture in the first cooling circuit in its temperature after cooled engine.Alternately or in combination, described sensor can detect the temperature before it is directed to motor of freezing mixture.
According to a preferred embodiment of the invention, the second cooling circuit comprises that the second coolant pump and control unit are suitable for controlling the startup of described the second coolant pump.When control unit has been inserted control valve unit primary importance and from the freezing mixture of the first cooling circuit during through the second radiator, this second coolant pump is advantageously in non-started state.The circulation of the freezing mixture in this not only can realize the first cooling circuit of the first coolant pump in the first cooling circuit but also can realize the circulation of the part freezing mixture circulating in the second cooling circuit.When freezing mixture, intend in the second cooling circuit internally circulation time, described control unit starts the second coolant pump.The second coolant pump is advantageously by electric drive, and this is because the operation of this coolant pump is easy to regulate.
According to a preferred embodiment of the invention, the freezing mixture in the first cooling circuit is during lower than minimum temperature in described scope, and described flow device is suitable for preventing that freezing mixture is passed to the second cooling circuit from the first cooling circuit.In this case, freezing mixture will can not be elevated to the operating temperature of wanting and therefore not need cooling.Freezing mixture only circulates at this in the first cooling circuit, and because thermostat cuts out, so do not have freezing mixture to be directed to the first radiator to be cooled.In this serviceability, cooling system is worked in the mode identical with traditional cooling system.
Another preferred embodiment according to the present invention, the freezing mixture of described flow device in the first cooling circuit regulates higher than thermostat to be had freezing mixture from the first cooling circuit transmission and not to be passed to the possibility of the second cooling circuit in the different operating situation of temperature.Needing under the operational circumstances of super large cooling capacity, as when motor is when heavy duty or retarder start, be suitable for not only using the first radiator but also use the second radiator with the freezing mixture in cooling the first cooling circuit.Other time, the second cooling circuit must operate individually and by its cooling assembly and/or medium, be undertaken cooling to being intended to.
Another preferred embodiment according to the present invention, the second cooling circuit comprises via its freezing mixture can be directed to from the first cooling circuit the connecting line of the second cooling circuit; And can after through the second radiator, from the second cooling circuit, lead back to the connecting line of the first cooling circuit via its freezing mixture.In this case, can be through the relatively limited part that comprises at least the second radiator of the second cooling circuit from the freezing mixture of the first cooling circuit.
Another preferred embodiment according to the present invention, the first radiator and the second radiator are air-cooled.They are advantageously located in the front section of vehicle.They can be arranged in vehicle as lower area so that the second radiator under all operations situation substantially by more cooling than the air of the first radiator lower temperature.The second radiator can contact with the ambient air in vehicle front section, and the first radiator is positioned at the second radiator rear in described front section simultaneously.Radiation fan can force normal air stream through two radiators at this.Other air-cooling device such as charge air cooler or cooler for recycled exhaust gas can be arranged in the front section of vehicle and by normal air, flow cooling.
The object of mentioning in background technique is also by realizing according to the method for claim 11 characteristic.
Accompanying drawing explanation
By means of example, together with the appended accompanying drawing of reference, the preferred embodiment of the invention is described below, in described accompanying drawing:
Fig. 1 describes according to the cooling system in the vehicle of the embodiment of the present invention.
Embodiment
Fig. 1 describes to be produced by internal-combustion engine 2 vehicle 1 of power.Described vehicle can be that heavy vehicle and motor are diesel engine.Waste gas from cylinder is directed to exhaust line 4 via gas exhaust manifold 3.The waste gas by positive pressure in exhaust line 4 is directed to the turbine 5 of turbines, thereby for turbine provides driving force, described driving force is passed to compressor 6 via link.Compressor compresses guiding via air filter 7 into the air in admission line 8.Charge air cooler 9 is arranged in the region A of vehicle front section on admission line 8.The object of charge air cooler is to it, to carry out cooling before forced air is directed to motor.Forced air in charge air cooler by being forced through the air of charge air cooler by radiation fan 10 and being undertaken cooling by the vehicle ventilation causing that travels forward.By means of suitable link, radiation fan is by engine-driving.
Motor 2 is by coolant cools, and described freezing mixture circulates in the first cooling circuit of cooling system by coolant pump 11.The first cooling circuit is provided with thermostat 12.Freezing mixture in the first cooling circuit is cooling in the first radiator 13, and described the first radiator is assemblied in the front section in the A of region of vehicle.This first radiator is positioned at the downstream of charge air cooler 9 with respect to cooling-air mobile direction in the A of region.The first cooling circuit comprises pipeline 14,15,16, described pipeline by freezing mixture from the first heat sink directs to motor.Coolant pump 11 is arranged in pipeline 16.The first cooling circuit comprises pipeline 17,18, and described pipeline guides to the first radiator 13 by freezing mixture from motor.Pipeline 17 comprises the hydraulic oil in hydraulic retarder is carried out to cooling retarder cooler 19.When freezing mixture is during lower than the adjusting temperature of thermostat, thermostat guides to motor from pipeline 17 via pipeline 15,16 by freezing mixture, and in this case, therefore freezing mixture is not cooled in the first radiator 13.When freezing mixture is during higher than the adjusting temperature of thermostat, thermostat guides to the first radiator for cooling by freezing mixture.The first cooling circuit is similar with the legacy system for cooling internal combustion engines substantially, but difference is to compare the adjusting temperature in traditional cooling system, and thermostat has higher adjusting temperature.
Cooling system not only comprises the first above-mentioned cooling circuit but also comprises the second cooling circuit that accommodates the second radiator 20, and described the second radiator is provided with the second coolant pump 28 so that freezing mixture circulates in the second cooling circuit.This second coolant pump is arranged in the pipeline 22 of the second cooling circuit.The control valve unit that is three-way valve 23 forms is connected with pipeline 22.When this valve is placed in the second place, described valve guides to pipeline 24 and the second radiator 20 the second cooling circuit by freezing mixture from pipeline 22.The second cooling circuit also comprises pipeline 25, and this pipeline guides to AC condenser 26 and gearbox cooler 27 by cold freezing mixture from the second radiator 20.Pipeline 25 is connected with pipeline 22.When the second coolant pump 28 is activated and three-way valve 23 during in the second place, circulate coolant is through the second radiator.In the second cooling circuit, the temperature of freezing mixture is reduced to the temperature of freezing mixture in the first cooling circuit under substantially all serviceability, and this is because freezing mixture can come cooling by the air in ambient temperature at this.Therefore gear box oil in refrigerant in AC condenser 26 and heat exchanger 27 can be cooled to relatively low temperature.
Freezing mixture from the first cooling circuit can be passed to the second cooling circuit via the first connecting line 21a being connected with three-way valve 23.This first connecting line thereby freezing mixture can be guided to described three-way valve by the pipeline from the first cooling circuit 16.When three-way valve is during in primary importance, it guides to pipeline 24 and the second radiator 20 by freezing mixture from the first pipeline 21a.After freezing mixture is through the second radiator, freezing mixture is directed to the second connecting line 21b via pipeline 25, and described the second connecting line is led back to the pipeline 15 in the first cooling circuit by freezing mixture.Cooling system comprises that control unit 29 is to control three-way valve 23 and to start the second coolant pump 28.In this case, the information that control unit 29 receives from temperature transducer 30, the coolant temperature at motor 2 downstreams and retarder cooler 19 upstream positions in described temperature sensor monitors pipeline 17.
During vehicle operating, control unit 29 receives the information from coolant temperature in relevant first cooling circuit of temperature transducer 30 substantially constantly.After starting, freezing mixture is by the initial temperature t lower than when it is cooling need to start time 1.This initial temperature t 1can it be for example 80 ℃.When freezing mixture is in lower than t 1temperature time, control unit will make three-way valve 23 insert the second place, thereby not have freezing mixture to be passed to the second cooling circuit from the first cooling circuit.Thermostat 12 has than described initial temperature t 1higher adjusting temperature t 2.This adjusting temperature can be for example 90 ℃.When coolant temperature is lower than t 1time thermostat therefore close.Therefore do not have freezing mixture to be guided to the first radiator 13 by described thermostat, and freezing mixture is by directed time the first coolant pump 11 not cooling in the situation that and motor 2.In this serviceability, when freezing mixture is lower than initial temperature t 1time, the first cooling circuit can be to work with mode like the cooling system class of tradition.In this serviceability, conventionally without any need for freezing mixture in the second cooling circuit, come cooling, and control unit 29 will not start the second coolant pump 28 conventionally, but if necessary, can start the second coolant pump 28 and freezing mixture is circulated in the second cooling circuit.
Freezing mixture in the first cooling circuit is warmed gradually by motor 2.When receiving freezing mixture from temperature transducer 30, control unit reached initial temperature t 1information time, described control unit is inserted primary importance by three-way valve 23.Described control unit also guarantees that the second coolant pump 28 is not in operation.A part for coolant flow in pipeline 16 thereby will be through the first connecting line 21a to three-way valve 23, it guides to pipeline 24 and the second radiator 20 in the second cooling circuit by freezing mixture.Directed through AC condenser 26 and directed before over-heat-exchanger 27 at freezing mixture, described freezing mixture passes through cooling in the air of ambient temperature in the second radiator, freezing mixture carries out cooling in described AC condenser to the refrigerant in AC facility, freezing mixture carries out cooling to gear box oil in described heat exchanger.Then freezing mixture is directed to pipeline 15 and thereby leads back to the first cooling circuit via the second connecting line 21b.Cold freezing mixture mixes with the freezing mixture from thermostat 12 at this, its will thereby in than initial temperature t 1high still than the adjusting temperature t of thermostat 2low temperature.The cold freezing mixture being cooled in the second radiator 20 thereby be subject to the coolant cools from thermostat.This cooling degree especially depends on that the freezing mixture having in how many first cooling circuits is cooled in the second radiator.
The second radiator 20 is less than the first radiator 13 significantly.Although it is cooling that described the second radiator uses air in ambient temperature to carry out freezing mixture wherein, yet compare the first radiator, it has significantly few cooling capacity.Therefore when the cold freezing mixture with from the second radiator mixes, the cooling effect of freezing mixture is starkly lower than to whole coolant flows in the first cooling circuit through the situation of the first radiator.The increase of coolant temperature t be stopped but the cooling deficiency of freezing mixture so that its get back to lower than initial temperature t 1.In most of the cases, coolant temperature start lower than with higher than initial temperature t 1between vibration possibility thereby be prevented from, this means that coolant temperature can be through the t that is everlasting 1and t 2between scope in keep the relatively long vehicle operating stage.In this case, continuous coolant flow is directed to the second radiator 20 and does not therefore bear by fast temperature and change any large thermal stress causing.During such operational phase, the first radiator 13 will be when not receiving any freezing mixture completely yet stationary temperature substantially, and therefore do not bear similarly by fast temperature and change any large thermal stress causing.
If ambient air is not cold especially, the temperature of freezing mixture is by the adjusting temperature t rising under the particular operational state at motor 2 higher than thermostat so 2.When this happens, thermostat by open and the first cooling circuit in freezing mixture be directed to the first radiator 13, to be cooled before again for cooled engine.When receiving freezing mixture, control unit 29 regulates temperature t higher than thermostat 2information time, described control unit will make three-way valve 23 insert the second place, stop thus flowing to from the first cooling circuit the coolant flow of the second cooling circuit.Meanwhile, described control unit moves to open the circulation in the second cooling circuit by setting the second coolant pump 28.When three-way valve is during in the second place, the first cooling circuit and the second cooling circuit act as two loops that separate.In this case, therefore motor comes cooling by the freezing mixture in the first cooling circuit, and the medium in heat exchanger 26,27 comes cooling by the freezing mixture in the second cooling circuit.In this serviceability, the freezing mixture in the second cooling circuit is by the lower temperature of temperature in obvious ratio the first cooling circuit.This means that the medium in heat exchanger 26,27 can be cooled to approach ambient temperature.Have following risk, freezing mixture can reach the adjusting temperature t about thermostat 2the temperature of vibration, but described risk is in the adjusting temperature t of the described rising of thermostat 12 2under very not large.Compare and have and initial temperature t 1traditional thermostat of corresponding adjusting temperature, thermostat thereby there is significantly higher adjusting temperature t 2.T 1with t 2between difference can be the magnitude of 10 ℃, this means adjusting temperature t 2not picture initial temperature t 1equally often be reached.This cooling system also provides following possibility, by switching three-way valve, changes the cooling of freezing mixture in the first cooling circuit, makes to change the temperature of freezing mixture and prevents thus about regulating temperature t 2any possible temperature cycle change.
Also there is other situation, for example, if control unit 29 receives to exist, in charge air cooler 9, form the information of the risk of ice, in described situation, can be suitable for freezing mixture to guide to the second cooling circuit from the first cooling circuit so.Control unit can receive such information from temperature transducer, and described temperature sensor monitors is near the temperature of the inlet air of charge air cooler.Three-phase valve is inserted to primary importance and freezing mixture will be guided to the second radiator 20 by the pipeline from the first pipe-loop 16 relatively.Flow through the air of the second radiator thereby bear obvious temperature and raise.Arrive the air in charge air cooler 9 downstreams thereby by the temperature in apparently higher than 0 ℃, make any ice-out forming in charge air cooler.When the temperature that receives inlet air when control unit has risen the signal that is back to acceptable level, described control unit will be inserted the second place by three-way valve 23.For other occasion that three-way valve is inserted to primary importance, be in following operational circumstances, wherein motor is under heavy duty or retarder is activated.For freezing mixture in the first cooling circuit, such situation needs high cooling capacity.Freezing mixture can not only be cooled in the first radiator 13 but also in the second radiator 20 in this case, reduced the risk of cooling system overload.
The cooling system more than indicating thereby there are several advantages.Can eliminate significantly the frequent and warm freezing mixture of thermostat switching and with short interval, be guided to the problem of cold radiator.Utilization is according to cooling system of the present invention, and the working life of the first radiator 13 therefore can significant prolongation.Following possibility is provided, with low-load, increases temperature, the reduction fuel consume of freezing mixture.In addition, the first cooling circuit where necessary can be by can not only providing the cooling capacity of increase to coolant cools with the first radiator but also with the second radiator.
The present invention is restricted to absolutely not described embodiment, but can freely change within the scope of the claims.

Claims (11)

1. the freezing mixture for the cooling system in vehicle carries out cooling equipment, described cooling system comprises: the first cooling circuit, described the first cooling circuit comprises the first coolant pump (11) that makes circulate coolant pass through the first cooling circuit, the first radiator (13) that makes coolant cools and thermostat (12), and described thermostat is the adjusting temperature (t higher than this thermostat at freezing mixture 2) time open freezing mixture to be guided to the first radiator (13); And second cooling circuit, described the second cooling circuit comprises for freezing mixture being carried out to cooling the second radiator (20), it is characterized in that, described cooling system comprises flow device (23,29), and the freezing mixture that described flow device is suitable in the first cooling circuit initially needs cooling minimum temperature (t in passing through freezing mixture 1) and with the adjusting temperature (t of described thermostat 2) part for freezing mixture is passed to the second cooling circuit so that this portion cooling agent is cooling the second radiator (20) from the first cooling circuit in the temperature range that limits of equal maximum temperature time.
2. cooling system according to claim 1, it is characterized in that, described flow device comprises control valve unit (23), and described control valve unit guides to freezing mixture the second cooling circuit and prevents that in the second place freezing mixture is through flowing to the second cooling circuit from the first cooling circuit from the first cooling circuit in primary importance.
3. cooling system according to claim 2, it is characterized in that, described flow device comprises control unit (29), and described control unit is suitable for receiving when freezing mixture in the first cooling circuit is in the information of the temperature (t) in described temperature range described control valve unit (23) being inserted to primary importance at it.
4. cooling system according to claim 3, is characterized in that, described control unit (29) is suitable for receiving the information from temperature transducer (30), and described temperature transducer detects the temperature of a certain position freezing mixture in the first cooling circuit.
5. according to the cooling system described in claim 3 or 4, it is characterized in that, described the second cooling circuit comprises that the second coolant pump (28) and described control unit (29) are suitable for controlling the startup of described the second coolant pump (28).
6. according to cooling system in any one of the preceding claims wherein, it is characterized in that, described flow device (23,29) is suitable for the freezing mixture minimum temperature (t in lower than described temperature range in the first cooling circuit 1) temperature time prevent that freezing mixture is passed to the second cooling circuit from the first cooling circuit.
7. according to cooling system in any one of the preceding claims wherein, it is characterized in that, the freezing mixture in the first cooling circuit is in regulating temperature (t higher than thermostat 2) the different operating situation of temperature under, described flow device (23,29) has freezing mixture from the first cooling circuit transmission and is not passed to the possibility of the second cooling circuit.
8. according to cooling system in any one of the preceding claims wherein, it is characterized in that, described the second cooling circuit comprises via its freezing mixture can be directed to from the first cooling circuit the connecting line (21a) of the second cooling circuit; And can through the second radiator (20), from the second cooling circuit, lead back to afterwards the connecting line (21b) of the first cooling circuit via its freezing mixture.
9. according to cooling system in any one of the preceding claims wherein, it is characterized in that, described the first radiator (13) and described the second radiator (20) are air-cooled.
10. according to cooling system in any one of the preceding claims wherein, it is characterized in that, described the first radiator and described the second radiator (20) be arranged in vehicle (1) as lower area, so that described the second radiator is by cooling in coming than the air of the first radiator (13) lower temperature under all substantially operating conditions.
11. 1 kinds of methods for the coolant cools in vehicle cooling system, described cooling system comprises: the first cooling circuit, described the first cooling circuit comprises the first coolant pump (11) that makes circulate coolant pass through the first cooling circuit, the first radiator (13) that makes coolant cools and thermostat (12), and described thermostat is the adjusting temperature (t higher than this thermostat at freezing mixture 2) time open freezing mixture to be guided to the first radiator (13); And second cooling circuit, described the second cooling circuit comprises for freezing mixture being carried out to cooling the second radiator (20), it is characterized in that following steps: the freezing mixture in the first cooling circuit is in passing through the initial cooling minimum temperature (t of needs of freezing mixture 1) and with the adjusting temperature (t of described thermostat 2) part for freezing mixture is passed to the second cooling circuit so that this portion cooling agent is cooling the second radiator (20) from the first cooling circuit in the temperature range that limits of equal maximum temperature time.
CN201280062826.XA 2011-12-23 2012-12-03 Arrangement and method for cooling of coolant in cooling system in vehicle Pending CN104011343A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1151273A SE536283C2 (en) 2011-12-23 2011-12-23 Arrangement and method for cooling coolant in a cooling system of a vehicle
SE1151273-8 2011-12-23
PCT/SE2012/051334 WO2013095262A1 (en) 2011-12-23 2012-12-03 Arrangement and method for cooling of coolant in a cooling system in a vehicle

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Publication Number Publication Date
CN104011343A true CN104011343A (en) 2014-08-27

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CN107002514A (en) * 2014-12-05 2017-08-01 斯堪尼亚商用车有限公司 Cooling device for WHRS
CN107002514B (en) * 2014-12-05 2019-06-14 斯堪尼亚商用车有限公司 Cooling device for Waste Heat Recovery System
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CN109154227A (en) * 2016-05-19 2019-01-04 斯堪尼亚商用车有限公司 Cooling system for internal combustion engine and other object
CN107472000A (en) * 2016-08-08 2017-12-15 宝沃汽车（中国）有限公司 The cooling system of vehicle
CN106150658A (en) * 2016-08-29 2016-11-23 中车大连机车车辆有限公司 Cooling control method in diesel engine of diesel locomotive cooling water system separate type
CN106224072A (en) * 2016-08-29 2016-12-14 中车大连机车车辆有限公司 Cooling Water of Diesel Locomotive high/low temperature automatic mixed flow system
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WO2013095262A1 (en) 2013-06-27
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BR112014012865A2 (en) 2017-06-13

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Application publication date: 20140827