CN105179062B - A kind of dual cycle cooling system improved structure of the double expansion tanks of band - Google Patents

A kind of dual cycle cooling system improved structure of the double expansion tanks of band Download PDF

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CN105179062B
CN105179062B CN201510679582.5A CN201510679582A CN105179062B CN 105179062 B CN105179062 B CN 105179062B CN 201510679582 A CN201510679582 A CN 201510679582A CN 105179062 B CN105179062 B CN 105179062B
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water
water pump
cooling system
flow path
water inlet
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CN105179062A (en
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苏晓芳
张应兵
张建操
刘俊
倪成鑫
刘彤
朱浩杰
陈友祥
房程程
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The present invention relates to a kind of dual cycle cooling system improved structure of the double expansion tanks of band, include high temperature circulation cooling system and low-temperature circulating cooling system;The high temperature circulation cooling system includes expansion tank, high temperature heat sink, engine cooling water jacket, the first water pump, electronic thermostat, machine oil cooler, Electron pressurizing unit and warm wind;The low-temperature circulating cooling system, includes the expansion tank, low-temperature radiator, turbocharger, the second water pump, charge air cooler, BSG.The application is respectively provided with high temperature heat sink and low-temperature radiator by setting two sets of circulating cooling systems, is effectively guaranteed requirement of the different components to be cooled to cooling temperature, and the technical solution of the application does not increase the volume of cooling system.

Description

A kind of dual cycle cooling system improved structure of the double expansion tanks of band
Technical field
Dual cycle cooling system the invention belongs to automobile cooling system field, in particular to a kind of double expansion tanks of band changes Into structure.
Background technology
More and more harsh standard is promulgated in oil consumption of the national governments to engine, for example is provided in the year two thousand twenty requirement vehicle main frame Factory persistently reduces oil consumption to 5.0L/100km;Fuel-economizing has become the development trend of world car, and most important in fuel-saving measures A technology be exactly engine supercharging miniaturization+Technology of Hybrid Electric Vehicle.
In response to the regulation of local government, it is necessary to find a kind of Engine Matching system more innovated to complete this Target.Because on the premise of dynamic property is not lost, want that decline 30% substantially one can not on the basis of at present oil consumption Completing for task.Therefore propose that face using hybrid power system+electronics supercharging, is increased by weak mixed and engine on the engine Pressure miniaturization, the requirement of reduction oil consumption is reached with this.Since whole system matches extremely complex, corresponding vehicle cooling system System design also tends to complexity.
Conventional engines cooling system, when engine works, the heat that fuel oil burning produces is except acting, heat radiation and biography Lead and taken away outside through exhaust gas, its excess heat is both needed to be cooled down by cooling system.It is whole cold in conventional engines cooling system But circulation is divided into two kinds, i.e. systemic circulation under partial circulating and thermostat opening under thermostat closed mode.Thermostat closes Closed state, engine, which is in, at this time just starts working status, and water temperature, which is not gone up also, to be come, and thermostat is closed at this time so that cooling Water by radiator, is not conducive to quickly improve water temperature, engine is reached optimum Working, as water temperature gradually rises, Cured bag expanded by heating in thermostat, thermostat are gradually opened, and the circuit for connecting radiator is opened, and then enters systemic circulation shape State.
Under the systemic circulation state of conventional engines cooling system, an only major loop, with engines fuel-economizing technology Constantly promote, the amount of parts integrated on engine gradually increases, such as charge air cooler, BSG, Electron pressurizing unit, these are new Integrated parts, also need to be cooled down, and still, its required cooling temperature, flow and control logic are with starting Machine gray iron is completely different;Therefore, traditional cooling control loop cannot meet the application of new technology.
In addition, traditional mechanical thermostat response is slow, unlatching, closing are determined by the water temperature of engine, are unfavorable for The warming-up of engine and the quick cooling of water temperature.
The prior art proposes, air-cooled technology is used to charge air cooler, BSG and Electron pressurizing unit, but air-cooled to space requirement Height, has higher requirements the arrangement of whole enging cabin, and arrangement difficulty is big, and heat evil calculates complexity, and thermal balance risk is big, generally needs It is iteratively improved and can be only achieved ideal effect, in addition vehicle use environment is changeable so that air cooling system is difficult to meet a variety of uses The demand of each operating mode of environment.
Engine with supercharger pinking is currently the most intractable technical barrier of domestic and international automobile industry, one reason for this is that air inlet Temperature is excessive or unstable.At present, cold mode is better than cold mode in air-cooled in water cooling, but the water inlet of water cooling charge air cooler (cooling Liquid) temperature can directly affect the intake air temperature of engine.The intake air temperature of engine generally requires control below 60 DEG C, otherwise Combustion knock can be caused or cause ECU to turn round (measure of limitation moment of torsion) to the limit of transmitter, therefore the cooling cycle of charge air cooler is general Low-temperature circulating can individually be arranged.And low-temperature circulating coolant temperature have to be lower than 55 DEG C, preferably lower than 50 DEG C, but actually very much Under operating mode, the inflow temperature of charge air cooler exceedes above-mentioned limit value (55 or 50 DEG C).One of reason for that is low-temperature circulating and height Although temperature circulation has single radiator, an expansion tank is shared, causes the high temperature coolant in expansion tank to enter low Temperature circulation, influences the inflow temperature of charge air cooler, and reason is:(1) charge air cooler into coolant comes from middle cold heat sink and swollen Swollen kettle, although the flow of expansion tank is smaller, cold heat sink temperature is general in the coolant temperature ratio in expansion tank More than 50 DEG C are higher by, reaches as high as 100 DEG C;(2) water pump of low-temperature circulating is electronic water pump, and changed power is big, pace of change is fast, Cause the moisturizing bypass flow of expansion tank extremely unstable, therefore the moisturizing of expansion tank is that charge air cooler inflow temperature is high and unstable The main reason for determining.
The content of the invention
The purpose of the present invention is by proposing improved technology scheme to existing engine-cooling system, by the technical program, Can preferably adapt to that coolant between different components circulates flows to problem, solves charge air cooler, BSG, Electron pressurizing unit, turbine The cooling problem of booster, oil cooler, and the radiating requirements and turbine of BSG higher during low engine speeds can be solved Delay chilling function after booster is shut down.
The present invention is achieved by the following technical solutions:
A kind of dual cycle cooling system improved structure of the double expansion tanks of band, includes high temperature circulation cooling system and low temperature Circulating cooling system;
The high temperature circulation cooling system include the first expansion tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket, First water pump, electronic thermostat, oil cooler and warm wind;
First expansion tank is connected with the first water inlet of first water pump;The water outlet of first water pump point It is not connected with the water inlet of the cylinder body water jacket and the water inlet of the oil cooler;The water outlet of the oil cooler point The water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat are not connected;The water outlet connection of the cylinder body water jacket The water inlet of the cylinder cover water jacket;First water outlet of the cylinder cover water jacket connect respectively the high temperature heat sink water inlet and The auxiliary-valve of the electronic thermostat;Second water outlet of the cylinder cover water jacket connects the water inlet of the warm wind;The high temperature The water outlet of radiator is connected with the main valve of the electronic thermostat;The main valve of the electronic thermostat and the electronics section Second water inlet of the auxiliary-valve of warm device with first water pump is connected;The water outlet of the warm wind and first water pump 3rd water inlet connects;
The low-temperature circulating cooling system, includes the second expansion tank, low-temperature radiator, turbocharger, the second water Pump, Electron pressurizing unit, charge air cooler and BSG;
Second expansion tank is connected with the water inlet of second water pump;The water outlet of second water pump respectively with The water inlet of the charge air cooler and the connection of the water inlet of the turbocharger;The water outlet of the charge air cooler respectively with the electricity The water inlet of the water inlet of sub- booster and the BSG connect;The water outlet of the water outlet of the turbocharger, the BSG And water inlet of the water outlet of the Electron pressurizing unit with the low-temperature radiator is connected;The water outlet of the low-temperature radiator It is connected with the water inlet of second water pump;
First exhaust pipeline is connected between first expansion tank and the high temperature heat sink;It is swollen described second Second exhaust pipeline is connected between swollen water tank and the low-temperature radiator;In the cylinder cover water jacket and first expansion tank Between be connected with the 3rd gas exhaust piping.
The first check valve and first throttle valve are provided with the first exhaust pipeline;On the second exhaust pipeline It is provided with second throttle;The 3rd throttle valve is provided with the 3rd gas exhaust piping.
The high temperature circulation cooling system includes systemic circulation cooling flowing path and partial circulating cooling flowing path;
The systemic circulation cooling flowing path includes first flow path, second flow path and the 3rd flow path;
The first flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, institute for coolant State and return to described first by the second water inlet of first water pump after high temperature heat sink, the electronic thermostat main valve Water pump;
The second flow path passes sequentially through first water pump, the oil cooler, high temperature heat dissipation for coolant First water pump is returned to by the second water inlet of first water pump after device, the electronic thermostat main valve;
3rd flow path for coolant pass sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket and First water pump is returned to by the 3rd water inlet of first water pump after the warm wind;
The partial circulating cooling flowing path includes the 3rd flow path, the 4th flow path and the 5th flow path;
4th flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, institute for coolant State and first water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of electronic thermostat;
5th flow path passes sequentially through first water pump, the oil cooler and the electronics section temperature for coolant First water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of device.
The low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path;
6th flow path passes sequentially through second water pump, the turbocharger and the low temperature radiation for coolant Second water pump is returned after device;
7th flow path passes sequentially through second water pump, the charge air cooler, the BSG and the low temperature for coolant Second water pump is returned after radiator;
8th flow path for coolant pass sequentially through second water pump, the charge air cooler, the Electron pressurizing unit and Second water pump is returned after the low-temperature radiator.
First water pump is switching regulator mechanical water pump;Second water pump is electronic water pump.
First check valve and the first throttle valve arranged in series;First check valve is arranged at the swelling water Between case and the first throttle valve.
The beneficial effects of the invention are as follows:
1st, the coolant that the application comes out from cylinder cover water jacket is directly entered warm wind, and the coolant temperature that cylinder cover water jacket is gone out is complete Full up foot warm wind also improves the coolant temperature into warm wind to coolant temperature requirement, improves warm wind effect.
2nd, in low-temperature circulating cooling system, there is single low-temperature radiator, low-temperature circulating coolant temperature is kept Below 50 DEG C, check valve and throttle valve are housed in low-temperature radiator exhaust hose, prevent pressure in high temperature circulation cooling system When higher, high-temperature water adverse current enters low-temperature circulating cooling system, and in addition throttle valve prevents that temperature is higher in excessive expansion tank Coolant participate in low-temperature circulating cooling system.In low-temperature circulating cooling system between BSG, turbocharger and charge air cooler The design of connection structure, while the pressure differential of charge air cooler branch is added, be conducive to the cooling of engine charge, be effectively ensured Engine Inlet Temperature and intake efficiency, are conducive to play engine power performance, prevent pinking.
3rd, the application is equipped with check valve and throttle valve in high temperature heat sink exhaust hose, prevent the first expansion tank or its Adverse current when its flow path coolant pressure is higher, and prevent in the first expansion tank the excessive high temperature coolant without radiator from In-engine coolant circulation, the strong thermal balance for protecting engine of this device are flowed into before water pump.
4th, two expansion tanks of the use of the application, low-temperature circulating exhaust pipe and high temperature circulation exhaust pipe respectively from it is different Expansion tank connects, and effectively prevent when sharing expansion tank with high temperature circulation, the high temperature coolant in expansion tank passes through Compensation water lines before electronic water pump enter charge air cooler, and instability of flow, influence the stability of the inflow temperature of charge air cooler, together When influence engine inflow temperature and intake air temperature stability.
Brief description of the drawings
Fig. 1 is conventional engines cooling system frame diagram;
Fig. 2 is high temperature circulation cooling system frame diagram of the present invention;
Fig. 3 is low-temperature circulating cooling system frame diagram of the present invention.
Description of reference numerals
1 dotted line, 2 dotted lines, 3 dotted lines, 4 dotted lines, 5 solid lines, 6 solid lines, 7 dotted lines, 001 first expansion tank, 002 electronics section temperature Device, 003 first water pump, 004 cylinder body water jacket, 005 cylinder cover water jacket, 006 oil cooler, 007 high temperature heat sink, 008 electronics increase Depressor, 009 warm wind, 010 electronic water pump, 011 second expansion tank, 012 low-temperature radiator, 013BSG, 014 turbocharger, 015 charge air cooler, 016 first check valve, 017 first throttle valve, 019 second throttle, 020 the 3rd throttle valve.
Embodiment
Carry out the technical solution that the present invention will be described in detail by the following examples, following embodiment is only exemplary, only It can be used for explanation and illustration technical scheme, and be not to be construed as the limitation to technical solution of the present invention.
Critical component defines
BSG:A kind of (Belt Starter Generator) belt start generator system:Engine can be achieved rise/to stop Function, realizes the function such as energy regenerating, auxiliary torque.
Electron pressurizing unit:(Electric Super-Charger ESC) one kind can improve car engine ignition and combustion The electronic match product of burning state, main function be improve engine low side moment of torsion and moment of torsion response, can The rotating speed of motor is dragged to 70000 turns, it is necessary to air cools down motor in the range of 0.25S, is integrated in air cleaner Portion.
Electronic water pump:A kind of motor-driven water pump, is directly controlled its rotating speed by control unit of engine, it is not Influenced, can flexibly be worked according to the actual cooling requirement of engine by engine speed.
High temperature heat sink:High temperature heat sink is a part for automobile cooling system, mainly by intake chamber, water-supplying chamber, main leaf And the part such as radiator centre assembly, main function are the high temperature coolants cooled down in engine water jacket, belong to High-temperature cooling and follow Ring.
Low-temperature radiator:Low-temperature radiator is a part for automobile cooling system, mainly by intake chamber, water-supplying chamber, main leaf And the part such as radiator centre assembly, main function are to cool down engine intercooler, BSG, ESC, the cooling in turbocharger Liquid, belongs to sub-cooled circulation.
Expansion tank:A kind of component of automobile cooling system, main function are the spaces that an expansion is provided to coolant, The coolant of systematic absence is replenished in time, and removes the air to stagnate in cooling system, this patent is expanded using closed-loop control type Water tank, the coolant in kettle also assist in vehicle cooling water circulation, in addition, expansion tank also act as to heat radiator assembly, in it is cold The scavenging action of heat radiator assembly and engine.
Turbocharger:A kind of air compressor, increases air inflow by compressed air, utilizes the useless of engine discharge Gas inertia impulsive force promotes the indoor turbine of turbine, and turbine drives coaxial impeller again, impeller force feed is sent by air filter pipeline Air be allowed to supercharging and enter cylinder, main function is the output power of increase engine.
Charge air cooler:The auxiliary equipment of engine turbine supercharging, its role is to reduce Engine Inlet Temperature, improves engine Intake efficiency, and prevent pinking, be the important combiner of engine supercharging system.
Electronic thermostat:The relatively traditional thermostat of electronic thermostat adds electric heating function, thermostatic valve open strip Part is more flexible, and control unit collection sensor signal draws calculated value according to the program of setting, to electronic thermostat temperature tune Save unit and load corresponding voltage, main valve is opened by the way of electrical heating wax bag.Can be more accurate relative to traditional thermostat Control the various operating modes of engine under cooling system enter radiator coolant rate, change water range of DO.
Oil cooler:A kind of full name oil cooler, cold air (but) device of engine (lubricating oil), is divided into air-cooled and water Cold type.Water-cooling engine oil cooler controls the temperature of lubricating oil using coolant temperature, when lubricating oil temperature is high, by cooling Liquid reduces temperature;During engine start, then heat is absorbed from cooling water makes lubricating oil temperature be lifted rapidly.
As shown in Figure 2 to Figure 3, the present invention provides a kind of dual cycle cooling system improved structure of the double expansion tanks of band, bag High temperature circulation cooling system and low-temperature circulating cooling system are included;In this application, high temperature circulation cooling system and low-temperature circulating Different expansion tanks is respectively adopted as water replanishing device before exhaust and pump in cooling system.
In the attached drawing of the present embodiment, what dotted line 1 represented is the partial circulating circuit under electronic thermostat closed mode;Dotted line 2 expressions are first exhaust pipelines;What dotted line 3 represented is second exhaust pipeline;Dotted line 4 is water pipe;Solid line 5 is electronics section Systemic circulation circuit under warm device opening;Solid line 6 is low-temperature circulating cooling system flow path;Dotted line 7 is expressed as the 3rd exhaust pipe Road.
High temperature circulation cooling system, engine work, the heat that fuel oil burning produces is except acting, heat radiation, conduction warp Outside exhaust gas is taken away, remaining is cooled down by cooling system.Whole high temperature circulation cooling system is divided into two states:Electronics section Warm device closed mode (main valve door closure state) and electronic thermostat opening (main valve opening).
The high temperature circulation cooling system include the first expansion tank 001, high temperature heat sink 007, cylinder body water jacket 004, Cylinder cover water jacket 005, the first water pump 003, electronic thermostat 002, oil cooler 006 and warm wind 009.In this application, cylinder body The structure of water jacket and the structure of cylinder cover water jacket are to pass sequentially through cylinder body as coolant not this application claims in the range of Water jacket and cylinder cover water jacket and coolant, which are respectively supplied to cylinder body water jacket and cylinder cover water jacket, does not influence the protection domain of the application, this It is that requirement engine there will be cooling jacket in the claimed scope of application, that is, needs coolant to cool down, rather than using wind Cooling.
First expansion tank is connected with the first water inlet of first water pump;The water outlet of first water pump point It is not connected with the water inlet of the cylinder body water jacket and the water inlet of the oil cooler;The water outlet of the oil cooler point The water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat are not connected;The water outlet connection of the cylinder body water jacket The water inlet of the cylinder cover water jacket;First water outlet of the cylinder cover water jacket connect respectively the high temperature heat sink water inlet and The auxiliary-valve of the electronic thermostat;Second water outlet of the cylinder cover water jacket connects the water inlet of the warm wind;The high temperature The water outlet of radiator is connected with the main valve of the electronic thermostat;The main valve of the electronic thermostat and the electronics section Second water inlet of the auxiliary-valve of warm device with first water pump is connected;The water outlet of the warm wind and first water pump 3rd water inlet connects.
In this application, the 3rd of the first water inlet of the first water pump, the second water inlet of the first water pump and the first water pump Water inlet can collect for a water inlet as needed.First water outlet of cylinder cover water jacket and the second water outlet of cylinder cover water jacket It can also collect for a water outlet.
The high temperature circulation cooling system includes the high temperature circulation cooling system during electronic thermostat closed mode (partial circulating cooling flowing path), and the high temperature circulation cooling system (systemic circulation cooling flowing path) during electronic thermostat opening, Also high temperature circulation cooling system (partial circulating cooling flowing path and the systemic circulation cooling stream during the semi-open state of electronic thermostat are included Road coexist under cooling flowing path).
Electronic thermostat closed mode
Engine, which is in, at this time just starts working status, and water temperature, which is not gone up also, to be come, and at this time, electronic thermostat, which receives, to be started Machine ECU signals, determine that open and close, engine are born according to engine water outlet coolant temperature and the load condition of engine Lotus is low, and electronic thermostat remains turned-off, and engine is in partial circulating state, and rapid warming-up, advantageously reduces cold start-up oil consumption.
High temperature circulation cooling system during electronic thermostat closed mode include complete partial circulating circuit (the 4th flow path and 5th flow path) and warm wind circuit (the 3rd flow path);
4th flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, institute for coolant State and first water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of electronic thermostat;
5th flow path passes sequentially through first water pump, the oil cooler and the electronics section temperature for coolant First water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of device.
And can determine to open warm wind circuit, i.e. the 3rd flow path as needed, the 3rd flow path be coolant successively By after first water pump, the cylinder body water jacket, the cylinder cover water jacket, the Electron pressurizing unit, the warm wind by described 3rd water inlet of the first water pump returns to first water pump.
In this application, the unlatching of electronic thermostat is controlled by coolant temperature, in the present embodiment, low negative in engine During lotus, the opening temperature of electronic thermostat is set as 97 degrees Celsius, 112 degrees Celsius of standard-sized sheet temperature;During high engine load operating mode, The opening temperature of electronic thermostat is set as 85 degrees Celsius, 100 degrees Celsius of standard-sized sheet temperature;During engine middle-low load, entering When the coolant temperature of electronic thermostat is less than opening temperature, high temperature circulation cooling system is run by partial circulating flow path.At this In the other embodiments of application, the opening temperature of electronic thermostat can be set as needed, and have no effect on the protection of the application Scope, for example the opening temperature of electronic thermostat is arranged at 90,93,95,100 degrees Celsius of grades.Equally, electronic thermostat The full open temperature of main valve can also be set as other temperature, such as 105,108,115 degrees Celsius etc..
Above-mentioned 4th flow path and the 5th flow path are in-engine normal open circuit.
In the present embodiment, when the coolant temperature for entering electronic thermostat is higher than 112 degrees Celsius, electronic thermostat Main valve it is fully open, the auxiliary-valve Close All of electronic thermostat, at this time, the 4th flow path and the 5th flow path are closed.
The systemic circulation cooling flowing path of high temperature circulation cooling system during the electronic thermostat opening includes first Flow path and second flow path.
The first flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, institute for coolant State and return to described first by the second water inlet of first water pump after high temperature heat sink, the electronic thermostat main valve Water pump.
The second flow path passes sequentially through first water pump, the oil cooler, high temperature heat dissipation for coolant First water pump is returned to by the second water inlet of first water pump after device, the electronic thermostat main valve.
3rd flow path for coolant pass sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket and First water pump is returned to by the 3rd water inlet of first water pump after the warm wind.
At this time, engine coolant temperature is gradually increasing, and second water outlet of the coolant through cylinder cover water jacket is dissipated into high temperature Cooling is participated in hot device.In addition, first exhaust pipeline is designed on water inlet of radiator position, and on first exhaust pipeline It is provided with the first check valve 016 and first throttle valve 017;The 3rd exhaust is designed between cylinder cover water jacket and the first expansion tank Pipeline, the 3rd throttle valve 020 is provided with the 3rd gas exhaust piping, can effectively discharge the gas produced in high temperature water route, Avoid producing cavitation erosion problem in cooling cycle water route, first exhaust pipeline is completed by the first expansion tank, the first expansion tank Pressure cover is designed as 1.3Bar;High temperature water pipe is designed in the first water pump water inlet locations, to the first water pump moisturizing, avoids the Hypotony before one water pump, produces cavitation.
In coolant temperature when between 97 degrees Celsius to 112 degrees Celsius, the auxiliary-valve of electronic thermostat is in opening state While state, the main valve of electronic thermostat is also at opening, at this time, first flow path, second flow path, the 3rd flow path, Four flow paths and the 5th flow path exist at the same time.
The low-temperature circulating cooling system, as shown in Figures 2 and 3, includes the second expansion tank 011, low-temperature radiator 012nd, turbocharger 014, the second water pump, Electron pressurizing unit 008, charge air cooler 015 and BSG013;In this application, the second water Pump as electronic water pump 010.
Second expansion tank is connected with the water inlet of second water pump;The water outlet of second water pump respectively with The water inlet of the charge air cooler and the connection of the water inlet of the turbocharger;The water outlet of the charge air cooler respectively with the electricity The water inlet of the water inlet of sub- booster and the BSG connect;The water outlet of the water outlet of the turbocharger, the BSG And water inlet of the water outlet of the Electron pressurizing unit with the low-temperature radiator is connected;The water outlet of the low-temperature radiator It is connected with the water inlet of second water pump.
The low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path.
6th flow path passes sequentially through second water pump, the turbocharger and the low temperature radiation for coolant Second water pump is returned after device.
7th flow path passes sequentially through second water pump, the charge air cooler, the BSG and the low temperature for coolant Second water pump is returned after radiator.
8th flow path for coolant pass sequentially through second water pump, the charge air cooler, the Electron pressurizing unit and Second water pump is returned after the low-temperature radiator.
Low-temperature circulating cooling system is used for cooling to BSG, turbocharger and charge air cooler, coolant in low-temperature radiator BSG, turbocharger and charge air cooler are flowed separately through after being suctioned out by electronic water pump, the coolant after temperature rise is merged in into low Temperature radiator.In addition, the coolant in the second expansion tank sucks electronic water pump by the water pipe before electronic water pump, prevent Hypotony produces cavitation erosion before electronic water pump, meanwhile, the coolant of the mixing bubble in low-temperature radiator upper water box is because expansion The pressure differential of water tank and low-temperature radiator upper water box enters the second swelling water by the second throttle 019 on second exhaust pipeline Case.
Low-temperature circulating cooling system has single low-temperature radiator, meet charge air cooler inflow temperature control 50 degrees Celsius with Under cooling requirement;The electronic water pump of low-temperature circulating coolant power resources ECU controls, meets low engine speeds, high load capacity Or engine radiating requirements of BSG and charge air cooler when carrying out thermal starting by BSG front ends belt;Low-temperature circulating cools down hydraulic power The electronic water pump of source ECU controls, after meeting engine cutoff, the delay chilling demand of turbocharger.
The high temperature circulation cooling system of the present invention is run alone with low-temperature circulating cooling system, both do not intervene mutually.
The above is only the description of the preferred embodiment of the present invention, it is noted that due to the finiteness of literal expression, And objectively there are unlimited concrete structure, for those skilled in the art, the present invention is not being departed from On the premise of principle, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (6)

  1. A kind of 1. dual cycle cooling system improved structure of the double expansion tanks of band, it is characterised in that:Include high temperature circulation cooling System and low-temperature circulating cooling system;
    The high temperature circulation cooling system includes the first expansion tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket, first Water pump, electronic thermostat, oil cooler and warm wind;
    First expansion tank is connected with the first water inlet of first water pump;The water outlet of first water pump respectively with The water inlet of the cylinder body water jacket and the connection of the water inlet of the oil cooler;The water outlet of the oil cooler connects respectively Connect the water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat;Described in the water outlet connection of the cylinder body water jacket The water inlet of cylinder cover water jacket;First water outlet of the cylinder cover water jacket connects the water inlet of the high temperature heat sink and described respectively The auxiliary-valve of electronic thermostat;Second water outlet of the cylinder cover water jacket connects the water inlet of the warm wind;The high temperature heat dissipation The water outlet of device is connected with the main valve of the electronic thermostat;The main valve of the electronic thermostat and the electronic thermostat Second water inlet of the auxiliary-valve with first water pump be connected;The water outlet of the warm wind and the 3rd of first water pump Water inlet connects;
    The low-temperature circulating cooling system, includes the second expansion tank, low-temperature radiator, turbocharger, the second water pump, electricity Sub- booster, charge air cooler and belt start generator system;
    Second expansion tank is connected with the water inlet of second water pump;The water outlet of second water pump respectively with it is described The water inlet of charge air cooler and the connection of the water inlet of the turbocharger;The water outlet of the charge air cooler increases with the electronics respectively The water inlet of the water inlet of depressor and the belt start generator system connects;It is the water outlet of the turbocharger, described Water inlet of the water outlet of the water outlet of belt start generator system and the Electron pressurizing unit with the low-temperature radiator Connection;The water outlet of the low-temperature radiator is connected with the water inlet of second water pump;
    First exhaust pipeline is connected between first expansion tank and the high temperature heat sink;In second swelling water Second exhaust pipeline is connected between case and the low-temperature radiator;Between the cylinder cover water jacket and first expansion tank It is connected with the 3rd gas exhaust piping.
  2. 2. the dual cycle cooling system improved structure of the double expansion tanks of band according to claim 1, it is characterised in that:Institute State and the first check valve and first throttle valve are provided with first exhaust pipeline;The second section is provided with the second exhaust pipeline Flow valve;The 3rd throttle valve is provided with the 3rd gas exhaust piping.
  3. 3. the dual cycle cooling system improved structure of the double expansion tanks of band according to claim 1, it is characterised in that:It is described High temperature circulation cooling system includes systemic circulation cooling flowing path and partial circulating cooling flowing path;
    The systemic circulation cooling flowing path includes first flow path, second flow path and the 3rd flow path;
    The first flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, the height for coolant First water is returned to by the second water inlet of first water pump after temperature radiator, the electronic thermostat main valve Pump;
    The second flow path passes sequentially through first water pump, the oil cooler, the high temperature heat sink, institute for coolant State and first water pump is returned to by the second water inlet of first water pump after electronic thermostat main valve;
    3rd flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket and described for coolant First water pump is returned to by the 3rd water inlet of first water pump after warm wind;
    The partial circulating cooling flowing path includes the 3rd flow path, the 4th flow path and the 5th flow path;
    4th flow path passes sequentially through first water pump, the cylinder body water jacket, the cylinder cover water jacket, the electricity for coolant First water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of sub- thermostat;
    5th flow path passes sequentially through first water pump, the oil cooler and the electronic thermostat for coolant First water pump is returned to by the second water inlet of first water pump after auxiliary-valve.
  4. 4. the dual cycle cooling system improved structure of the double expansion tanks of band according to claim 1, it is characterised in that:It is described Low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path;
    After 6th flow path passes sequentially through second water pump, the turbocharger and the low-temperature radiator for coolant Return to second water pump;
    7th flow path passes sequentially through second water pump, the charge air cooler, the belt start generator system for coolant Second water pump is returned after system and the low-temperature radiator;
    8th flow path passes sequentially through second water pump, the charge air cooler, the Electron pressurizing unit and described for coolant Second water pump is returned after low-temperature radiator.
  5. 5. the dual cycle cooling system improved structure of the double expansion tanks of band according to claim 1, it is characterised in that:It is described First water pump is switching regulator mechanical water pump;Second water pump is electronic water pump.
  6. 6. the dual cycle cooling system improved structure of the double expansion tanks of band according to claim 2, it is characterised in that:It is described First check valve and the first throttle valve arranged in series;First check valve be arranged at first expansion tank with it is described Between first throttle valve.
CN201510679582.5A 2015-10-16 2015-10-16 A kind of dual cycle cooling system improved structure of the double expansion tanks of band Active CN105179062B (en)

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CN105888809A (en) * 2016-04-27 2016-08-24 安徽江淮汽车股份有限公司 Double-cooling circulation system improvement structure
CN105927355A (en) * 2016-04-27 2016-09-07 安徽江淮汽车股份有限公司 Engine cooling system
CN105927352A (en) * 2016-04-27 2016-09-07 安徽江淮汽车股份有限公司 Dual cycle cooling system with dual expansion kettles
KR101897341B1 (en) * 2016-09-12 2018-09-13 현대자동차주식회사 Structure of engine for vehicle

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