CN105201619B - A kind of dual cycle cooling system improved structure for including double expansion tanks - Google Patents

A kind of dual cycle cooling system improved structure for including double expansion tanks Download PDF

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CN105201619B
CN105201619B CN201510681168.8A CN201510681168A CN105201619B CN 105201619 B CN105201619 B CN 105201619B CN 201510681168 A CN201510681168 A CN 201510681168A CN 105201619 B CN105201619 B CN 105201619B
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water
pump
water pump
flow path
cooling system
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CN105201619A (en
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苏晓芳
张建操
张应兵
刘俊
刘彤
朱浩杰
房程程
陈帆
倪成鑫
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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 structures for including double expansion tanks, include high temperature circulation cooling system, low-temperature circulating cooling system and delay circulating cooling system;The high temperature circulation cooling system includes the first expansion tank, high temperature heat sink, engine cooling water jacket, the first water pump, electronic thermostat, machine oil cooler, turbocharger and warm wind;The low-temperature circulating cooling system includes the second expansion tank, low-temperature radiator, the second water pump, Electron pressurizing unit, charge air cooler and 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 for including double expansion tanks
Technical field
The invention belongs to automobile cooling system field, in particular to a kind of Two-way Cycle cooling systems for including double expansion tanks System improved structure.
Background technology
National governments promulgate more and more harsh standard, for example provide in the year two thousand twenty requirement vehicle main frame to the oil consumption of engine 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 under 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 generates is in addition to acting, heat radiation and biography It leads and is taken away outside through exhaust gas, excess heat is both needed to be cooled down by cooling system.It is entire cold in conventional engines cooling system But cycle is divided into two kinds, i.e. systemic circulation under partial circulating and thermostat opening under thermostat closed state.Thermostat closes Closed state, engine, which is in, at this time just starts working condition, and water temperature is gone up not yet 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 made to reach optimum Working, as water temperature gradually rises, Cured packet 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 It constantly promotes, 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, 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 being quickly cooled down for 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 to the arrangement of entire 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 excessively high 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 at 60 DEG C hereinafter, otherwise Combustion knock can be caused or ECU is caused to turn round (measure of limitation torque) 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 has 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 is more than above-mentioned limit value (55 or 50 DEG C).One of reason for that is low-temperature circulating and height Although temperature cycle has individual radiator, an expansion tank is shared, the high temperature coolant in expansion tank is caused to enter low Temperature cycle, 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 50 DEG C or more 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, The moisturizing bypass flow for causing expansion tank is extremely unstable, therefore the moisturizing of expansion tank is that charge air cooler inflow temperature is high and unstable The main reason for determining.
As rapid starting/stopping engine, after engine is shut down, mechanical water pump is stopped, after can not meeting engine shutdown The heating demands of driver's cabin, especially this defect is especially prominent under temperature lower ground area, city operating mode, therefore traditional cold But control loop cannot meet the application of new technology.
Invention content
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 recycles 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 for including double expansion tanks, include high temperature circulation cooling system, Low-temperature circulating cooling system and delay circulating cooling system;
The high temperature circulation cooling system includes the first expansion tank, the second expansion tank, high temperature heat sink, engine Cooling jacket, the first water pump, electronic thermostat, oil cooler and turbocharger;
The first water inlet of first expansion tank and second expansion tank with first water pump is connect;Institute Water inlet of the water outlet of the first water pump respectively with the engine cooling water jacket and the oil cooler is stated to connect;The machine The water outlet of oil cooler connects the water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat respectively;The hair First water outlet of motivation cooling jacket connects the water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat;Institute The second water outlet for stating engine cooling water jacket connects the water inlet of the turbocharger;The water outlet of the turbocharger It is connect with the third water inlet of first water pump;The main valve of the water outlet of the high temperature heat sink and the electronic thermostat Connection;The auxiliary-valve of the main valve of the electronic thermostat and the electronic thermostat enters water with the second of first water pump Mouth connection;
The low-temperature circulating cooling system includes second expansion tank, low-temperature radiator, the second water pump, electronics Booster, charge air cooler and BSG;
Second expansion tank is connect with the water inlet of second water pump;The water outlet of second water pump respectively with The water inlet connection of the water inlet of the charge air cooler, the water inlet of the Electron pressurizing unit and the BSG;The water outlet of the BSG Water inlet of the water outlet of mouth, the water outlet of the charge air cooler and the Electron pressurizing unit with the low-temperature radiator is connect; The water outlet of the low-temperature radiator is connect with the water inlet of second water pump;
The delay circulating cooling system includes first expansion tank, the high temperature heat sink, the auxiliary water Pump, the engine cooling water jacket, first water pump, the electronic thermostat, the oil cooler, the turbocharging Device and the warm wind;
First expansion tank is connect with the first water inlet of first water pump;The water outlet of first water pump point Water inlet not with the engine cooling water jacket and the oil cooler is connect;The water outlet of the oil cooler and institute The water inlet for stating high temperature heat sink is connect with the first water outlet of the engine cooling water jacket;The engine cooling water jacket The second water outlet connect the water inlet of the auxiliary pump;The water outlet of the auxiliary pump enters with the turbocharger The mouth of a river connects;The water outlet of the turbocharger is connect with the water inlet of the warm wind;The water outlet of the warm wind with it is described The third water inlet connection of first water pump;The water outlet of the high temperature heat sink is connect with the main valve of the electronic thermostat; The main valve of the electronic thermostat is connect with the second water inlet of first water pump;
First exhaust pipeline is connected between first expansion tank and the high temperature heat sink;It is swollen described first Second exhaust pipeline is provided between swollen water tank and the engine cooling water jacket;In second expansion tank and the low temperature Second exhaust pipeline is connected between radiator.
The high temperature circulation cooling system further includes one or two in auxiliary pump or warm wind;The auxiliary pump It is set between second water outlet of engine cooling water jacket and the turbocharger;The warm wind is set to the turbine Between the third water inlet of the water outlet of booster and first water pump.
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 third flow path;
The first flow path passes sequentially through first water pump, the engine cooling water jacket, the high temperature for coolant First water pump is returned to by the second water inlet of first water pump after radiator, the electronic thermostat main valve;
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;
The third flow path passes sequentially through the second water outlet of first water pump, the engine cooling water jacket for coolant First water pump is returned to by the third water inlet of first water pump after mouth, the turbocharger;
The partial circulating cooling flowing path includes the 4th flow path and the 5th flow path;
4th flow path passes sequentially through the first water outlet of first water pump, the engine cooling water jacket for coolant Mouthful, first water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of the 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 third flow path passes sequentially through the second water outlet of first water pump, the engine cooling water jacket for coolant Institute is returned to by the third water inlet of first water pump after mouth, the auxiliary pump, the turbocharger and the warm wind State the first water pump.
The first check valve and first throttle valve are provided on the downtake pipe road;On the second exhaust pipe road It is provided with second throttle;Third throttle valve is provided on the third gas exhaust piping.
The low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path;
6th flow path returns after passing sequentially through second water pump, the BSG and the low-temperature radiator for coolant Return second water pump;
After 7th flow path passes sequentially through second water pump, the charge air cooler and the low-temperature radiator for coolant Return to second water pump;
8th flow path passes sequentially through second water pump, the Electron pressurizing unit and the low temperature radiation for coolant Second water pump is returned after device.
The engine cooling water jacket includes cylinder body water jacket and cylinder cover water jacket.
First water pump is switching regulator mechanical water pump;Second water pump is electronic water pump;The auxiliary pump is electricity Control auxiliary pump.
The delay circulating cooling system includes the 9th flow path, the tenth flow path and the 11st flow path;
9th flow path enters the electronics section after the second water inlet of first water pump is passed sequentially through for coolant After warm device main valve, into the water outlet of the high temperature heat sink, pass through institute after being come out from the water inlet of the high temperature heat sink The first water outlet for stating engine cooling water jacket enters the engine cooling water jacket;Coolant is from the engine cooling water jacket The second water outlet enter the auxiliary pump;By sequentially entering the turbocharger and described warm after the auxiliary pump First water pump is returned to by the third entrance of first water pump after wind;
Tenth flow path enters water for the coolant from first pump outlet into the oil cooler Mouthful, enter engine cooling water jacket from the oil cooler water outlet by the first water outlet of engine cooling water jacket, from The coolant that second water outlet of engine cooling water jacket comes out passes sequentially through the auxiliary pump, the turbocharger again And first water pump is returned to by the third water inlet of first water pump after the warm wind;
The 11st flow path coolant passes sequentially through the second water outlet of first water pump, the engine cooling water jacket After mouth, the auxiliary pump, the turbocharger and the warm wind the is returned to by the third water inlet of first water pump One water pump.
The beneficial effects of the invention are as follows:
1st, before the application turbocharger is connected on warm wind, the coolant temperature that cylinder cover water jacket is gone out fully meets turbine increasing The coolant temperature requirement of depressor, while the coolant temperature into warm wind is also improved, improve warm wind effect.
2nd, in low-temperature circulating cooling system, there is individual low-temperature radiator, low-temperature circulating coolant temperature is made to keep At 50 DEG C hereinafter, equipped with throttle valve in low-temperature radiator exhaust hose, higher cold of temperature in excessive expansion tank is prevented But liquid is participated in low-temperature circulating cooling system.Charge air cooler, Electron pressurizing unit and BSG are in parallel advantageous in low-temperature circulating cooling system In the cooling of engine charge, Engine Inlet Temperature and intake efficiency has been effectively ensured, has been conducive to play engine power performance, Prevent pinking.And Electron pressurizing unit is set in low-temperature circulating cooling system, shuts down, can pass through in engine Delay chilling is realized in the operation of second water pump.
3rd, the application prevents expansion tank or other streams equipped with check valve and throttle valve in high temperature heat sink exhaust hose Adverse current when road coolant pressure is higher, and prevent the high temperature coolant without radiator excessive in expansion tank from being flowed before water pump Enter in-engine coolant cycle, the strong thermal balance for protecting engine of this device.
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 prevents 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;The first entrance of second expansion tank and the first water pump simultaneously Connection as the supplement of the first expansion tank, improves cooling effect.
5th, in the application, after engine is shut down, electronic water pump is stopped in mechanical water pump and low-temperature circulating, automatically controlled auxiliary Electronic water pump is started to work, and electronic thermostat is opened by ECU control electrically heated rod heating wax packets, main valve, and auxiliary-valve is closed, cylinder Body cylinder cover water jacket, high temperature heat sink, in oil cooler the higher coolant of temperature pumped out by automatically controlled auxiliary electron water pump it is subsequent It is continuous that Electron pressurizing unit, turbocharger are cooled down, heater is flowed through later, and driver's cabin is continued to heat, meets turbine The demand of booster delay chilling, while continue to support warm wind heating system after engine shutdown, improve the usability of vehicle Energy.
Description of the drawings
Fig. 1 is conventional engines cooling system frame diagram;
Fig. 2 is cooling system frame diagram of the present invention;
Fig. 3 is present invention delay circulating cooling system frame diagram.
Reference sign
1 dotted line, 2 dotted lines, 3 dotted lines, 4 dotted lines, 5 solid lines, 6 solid lines, 7 arrows, 8 dotted lines, 001 first expansion tank, 002 electricity Sub- thermostat, 003 first water pump, 004 cylinder body water jacket, 005 cylinder cover water jacket, 006 oil cooler, 007 high temperature heat sink, 008 Electron pressurizing unit, 009 warm wind, 010 electronic water pump, 011 second expansion tank, 012 low-temperature radiator, 013BSG, 014 turbine increase Depressor, 015 charge air cooler, 016 first check valve, 017 first throttle valve, 018 second throttle, 019 third throttle valve, 020 is auxiliary Help water pump.
Specific 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 of the present invention, 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 functions 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 torque and torque response, can The rotating speed of motor is dragged to 70000 turns in the range of 0.25S, air is needed to cool down motor, is integrated in air cleaner Portion.
Electronic water pump:A kind of motor-driven water pump directly controls its rotating speed by control unit of engine, it is not It is influenced, can be flexibly worked according to the practical 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 parts 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 parts such as radiator centre assembly, main function are to cool down engine intercooler, BSG, ESC, the cooling in turbocharger Liquid belongs to sub-cooled cycle.
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 pushes 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 enter cylinder, main function be increase engine output power.
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 increases electric heating function, thermostatic valve open strip Part is more flexible, and control unit acquisition sensor signal obtains calculated value according to the program of setting, to electronic thermostat temperature tune It saves unit and loads corresponding voltage, main valve is opened by the way of electrical heating wax packet.It can more precisely relative to traditional thermostat The various operating modes of control engine under cooling system enter the coolant rate of radiator, 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 promoted rapidly.
As shown in Figure 2 to Figure 3, the present invention provides a kind of dual cycle cooling system for including double expansion tanks and improves knot Structure includes high temperature circulation cooling system, low-temperature circulating cooling system and delay circulating cooling system;In this application, high temperature Circulating cooling system and low-temperature circulating cooling system use respective expansion tank to be used as water replanishing device before exhaust and pump respectively, this Sample can avoid the interference between binary cycle system completely.
In the attached drawing of the present embodiment, what dotted line 1 represented is the partial circulating circuit under electronic thermostat closed state;Dotted line 2 expressions are first exhaust pipelines;What dotted line 3 represented is the road of second exhaust;Dotted line 4 is water pipe;Dotted line 8 is arranged for third Air pipe;Solid line 5 is the systemic circulation circuit under electronic thermostat opening;Solid line 6 is low-temperature circulating cooling system flow path;Arrow First 7 represent to be the delay circulatory system.
High temperature circulation cooling system, engine work, the heat that fuel oil burning generates is in addition to acting, heat radiation, conduction warp Outside exhaust gas is taken away, remaining is cooled down by cooling system.Entire high temperature circulation cooling system is divided into two states:Electronics section Warm device closed state (main valve door closure state) and electronic thermostat opening (main valve opening).
The high temperature circulation cooling system includes the first expansion tank 001, the second expansion tank 011, high temperature heat sink 007th, engine cooling water jacket, the first water pump 003, electronic thermostat 002, machine oil cooler 006, auxiliary pump 020, turbocharging Device 014 and warm wind 009.In this application, under usual high temperature circulation cooling system state (such as when non-winter), it is auxiliary Water pump 020 is helped not work, which only plays the role of connecting water channel, in winter, particularly on the low ground of outdoor environment Area needs warm wind extensive work, and regular circulation may meet interior temperature at this time, can be carried by opening auxiliary pump High circulation amount.Under the season or environment for not needing to warm wind, warm wind can be closed as needed, then at this time coolant only be used for it is cold But turbocharger, coolant connect the third water inlet of the first water pump by warm wind bypass line.In the present embodiment, start Machine cooling jacket includes cylinder body water jacket 004 and cylinder cover water jacket 005, in this application, the structure and cylinder cover water jacket of cylinder body water jacket Structure not this application claims in the range of, be to pass sequentially through cylinder body water jacket and cylinder cover water jacket and cooling as coolant Liquid, which is respectively supplied to cylinder body water jacket and cylinder cover water jacket, does not influence the protection domain of the application, this application claims in the range of It is that requirement engine there will be cooling jacket, that is, needs coolant to cool down rather than using air cooling.
The first water inlet of first expansion tank and second expansion tank with first water pump is connect;Institute Water inlet of the water outlet of the first water pump respectively with the engine cooling water jacket and the oil cooler is stated to connect;The machine The water outlet of oil cooler connects the water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat respectively;The hair First water outlet of motivation cooling jacket connects the water inlet of the high temperature heat sink and the auxiliary-valve of the electronic thermostat;Institute The second water outlet for stating engine cooling water jacket connects the water inlet of the turbocharger by auxiliary pump;The turbine increases The water outlet of depressor is connect with the water inlet of the warm wind;The third water inlet of the water outlet of the warm wind and first water pump Connection;The water outlet of the high temperature heat sink is connect with the main valve of the electronic thermostat;The main valve of the electronic thermostat Second water inlet of the auxiliary-valve of door and the electronic thermostat with first water pump is connect.
In present embodiments, the first water inlet of the first water pump, the second water inlet and first of the first water pump The third water inlet of water pump can collect as needed for a water inlet.First water outlet of engine cooling water jacket and start Second water outlet of machine cooling jacket can collect as needed for a water outlet.
The high temperature circulation cooling system includes the high temperature circulation cooling system during electronic thermostat closed state High temperature circulation cooling system (systemic circulation cooling flowing path) when (partial circulating cooling flowing path) and electronic thermostat opening, Also include high temperature circulation cooling system (partial circulating cooling flowing path and the systemic circulation cooling stream during the semi-open state of electronic thermostat Road coexist under cooling flowing path).
Electronic thermostat closed state:
Engine, which is in, at this time just starts working condition, and water temperature is gone up not yet to be come, at this point, electronic thermostat reception is 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 state include complete partial circulating circuit (the 4th flow path and 5th flow path) and warm wind circuit (third flow path).
4th flow path passes sequentially through the first water outlet of first water pump, the engine cooling water jacket for coolant Mouthful, first water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of the 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. third flow path as needed, the third flow path for coolant successively By first water pump, the second water outlet of the engine cooling water jacket, the auxiliary pump, the turbocharger, First water pump is returned to by the third water inlet of first water pump after the warm wind.
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 Range, for example the opening temperature of electronic thermostat is set to 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 point, 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, second flow path and third flow path.
The first flow path passes sequentially through first water pump, the engine cooling water jacket, the high temperature for coolant First water pump is returned to by the second water inlet of first water pump after radiator, the electronic thermostat main valve.
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.
The third flow path passes sequentially through the second water outlet of first water pump, the engine cooling water jacket for coolant By described in the return of the third water inlet of first water pump after mouth, the auxiliary pump, the turbocharger, the warm wind First water pump.In third flow path, whether auxiliary pump or warm wind are opened by interior temperature needs and are determined, work as auxiliary pump Or warm wind only plays path effect when closed.
At this point, engine coolant temperature is gradually increasing, water outlet of the coolant in engine cooling water jacket through engine Mouth, which enters, participates in cooling in high temperature heat sink, as shown in Fig. 2 high temperature circulations.In addition, in water inlet of radiator Position Design One gas exhaust piping, and the first check valve 016 and first throttle valve 017 are provided on downtake pipe road;In cylinder cover water jacket Second exhaust pipeline is provided on 005, and second throttle 018 is set on second exhaust pipe road;Height can effectively be discharged The gas generated in warm water road avoids leading to the problem of cavitation erosion in cooling cycle water route, first exhaust pipeline and second exhaust pipeline It is completed by the first expansion tank, the first expansion tank pressure cover is designed as 1.3Bar;It is set in the first water pump water inlet locations High temperature water pipe is counted, to the first water pump moisturizing, hypotony before the first water pump is avoided, generates 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 point, first flow path, second flow path, third flow path, Four flow paths and the 5th flow path exist simultaneously.
The low-temperature circulating cooling system, as shown in figure 3, including second expansion tank 011, low-temperature radiator 012nd, the second water pump, charge air cooler 015, Electron pressurizing unit 008 and BSG013;In this application, the second water pump is electronic water pump 010。
Second expansion tank is connect with the water inlet of second water pump;The water outlet of second water pump respectively with The water inlet connection of the water inlet of the charge air cooler, the water inlet of the Electron pressurizing unit and the BSG;The water outlet of the BSG Water inlet of the water outlet of mouth, the water outlet of the charge air cooler and the Electron pressurizing unit with the low-temperature radiator is connect; The water outlet of the low-temperature radiator is connect 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 first Second exhaust pipeline is provided between swollen water tank and the engine cooling water jacket;In second expansion tank and the low temperature Third gas exhaust piping is connected between radiator.
The first check valve 016 and first throttle valve 017 are provided on the downtake pipe road;In the second exhaust Second throttle 018 is provided on pipeline;Third throttle valve 019 is provided on the third gas exhaust piping.
The low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path.
6th flow path returns after passing sequentially through second water pump, the BSG and the low-temperature radiator for coolant Return second water pump.
After 7th flow path passes sequentially through second water pump, the charge air cooler and the low-temperature radiator for coolant Return to second water pump.
8th flow path passes sequentially through second water pump, the Electron pressurizing unit and the low temperature radiation for coolant Second water pump is returned after device.
Low-temperature circulating cooling system is for cooling to BSG, Electron pressurizing unit and charge air cooler, coolant in low-temperature radiator BSG branches, charge air cooler branch and Electron pressurizing unit branch, the coolant after temperature raising are flowed separately through after being sucked out by electronic water pump Into low-temperature radiator.In addition, the coolant in the second expansion tank sucks electronic water by the water pipe before electronic water pump Pump prevents hypotony before electronic water pump from generating cavitation erosion, meanwhile, the coolant of the mixing bubble in low-temperature radiator upper water box because Enter the by the third throttle valve on third gas exhaust piping for the pressure differential of the second expansion tank and low-temperature radiator upper water box Two expansion tanks.
Low-temperature circulating cooling system has individual 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.
The high temperature circulation cooling system of the present invention is run alone with low-temperature circulating cooling system, and the two does not intervene mutually.
In this application, further included the delay circulatory system, to after engine stop works to driving indoor confession It is warm.In this application, the delay circulatory system includes the first expansion tank 001, high temperature heat sink 007, auxiliary pump 020th, engine cooling water jacket, the first water pump 003, electronic thermostat 002, oil cooler 006, turbocharger 008 and warm Wind 009;In this application, under engine behavior, the first pump working, auxiliary pump is off working state, is only played Path effect.In this application, in the case where postponing circulatory system state, the first water pump is off working state, only plays path effect. Coolant cycles through auxiliary pump to realize, in this application, auxiliary pump is electron assistant water pump.The delay of the application Circulating cooling system primarily serves two purposes, and a purpose is the delay chilling to turbocharger, another purpose is pair Car heating.
First expansion tank is connect with the first water inlet of first water pump;The water outlet of first water pump point Water inlet not with the engine cooling water jacket and the oil cooler is connect;The water outlet of the oil cooler and institute The water inlet for stating high temperature heat sink is connect with the first water outlet of the engine cooling water jacket;The engine cooling water jacket The second water outlet connect the water inlet of the auxiliary pump;The water outlet of the auxiliary pump enters with the turbocharger The mouth of a river connects;The water outlet of the turbocharger is connect with the water inlet of the warm wind;The water outlet of the warm wind with it is described The third water inlet connection of first water pump;The water outlet of the high temperature heat sink is connect with the main valve of the electronic thermostat; The main valve of the electronic thermostat is connect with the second water inlet of first water pump.
The delay circulating cooling system includes the 9th flow path, the tenth flow path and the 11st flow path;
9th flow path enters the electronics section after the second water inlet of first water pump is passed sequentially through for coolant After warm device main valve, into the water outlet of the high temperature heat sink, pass through institute after being come out from the water inlet of the high temperature heat sink The first water outlet for stating engine cooling water jacket enters the engine cooling water jacket;Coolant is from the engine cooling water jacket The second water outlet enter the auxiliary pump;By sequentially entering the turbocharger and described warm after the auxiliary pump First water pump is returned to by the third entrance of first water pump after wind;
Tenth flow path enters water for the coolant from first pump outlet into the oil cooler Mouthful, enter engine cooling water jacket from the oil cooler water outlet by the first water outlet of engine cooling water jacket, from The coolant that second water outlet of engine cooling water jacket comes out passes sequentially through the auxiliary pump, the turbocharger again And first water pump is returned to by the third water inlet of first water pump after the warm wind;
The 11st flow path coolant passes sequentially through the second water outlet of first water pump, the engine cooling water jacket After mouth, the auxiliary pump, the turbocharger and the warm wind the is returned to by the third water inlet of first water pump One water pump.
Under the delay circulating cooling system state of the application, the opening and closing of warm wind determine as needed.
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 structures, for those skilled in the art, the present invention is not being departed from Under the premise of principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of dual cycle cooling system improved structure for including double expansion tanks, it is characterised in that:Include high temperature circulation Cooling system, low-temperature circulating cooling system and delay circulating cooling system;
The high temperature circulation cooling system includes the first expansion tank, the second expansion tank, high temperature heat sink, engine cool Water jacket, the first water pump, electronic thermostat, oil cooler and turbocharger;First expansion tank and described second swollen First water inlet of the swollen water tank with first water pump is connect;The water outlet of first water pump is cold with the engine respectively But the water inlet connection of oil cooler described in water sleeve;The water outlet of the oil cooler connects the high temperature heat dissipation respectively The auxiliary-valve of the water inlet of device and the electronic thermostat;First water outlet of the engine cooling water jacket connects the high temperature The auxiliary-valve of the water inlet of radiator and the electronic thermostat;The second water outlet connection auxiliary of the engine cooling water jacket Water pump water inlet, auxiliary pump water outlet connect the water inlet of the turbocharger;The water outlet of the turbocharger with The water inlet connection of warm wind, the water outlet of warm wind are connect with the third water inlet of first water pump;The high temperature heat sink Water outlet is connect with the main valve of the electronic thermostat;The pair of the main valve of the electronic thermostat and the electronic thermostat Second water inlet of the valve with first water pump is connect;
The low-temperature circulating cooling system includes second expansion tank, low-temperature radiator, the second water pump, electronics supercharging Device, charge air cooler and BSG;The BSG is belt start generator system;Second expansion tank enters with second water pump The mouth of a river connects;The water outlet of second water pump respectively with the water inlet of the charge air cooler, the water inlet of the Electron pressurizing unit And the water inlet connection of the BSG;The water outlet of the BSG, the water outlet of the charge air cooler and going out for the Electron pressurizing unit Water inlet of the mouth of a river with the low-temperature radiator is connect;The water outlet of the low-temperature radiator enters water with second water pump Mouth connection;
The delay circulating cooling system includes first expansion tank, the high temperature heat sink, auxiliary pump, the hair Motivation cooling jacket, first water pump, the electronic thermostat, the oil cooler, the turbocharger and warm wind; First water outlet of the water outlet of the oil cooler and the engine cooling water jacket enters with the high temperature heat sink The mouth of a river connects;Second water outlet of the engine cooling water jacket connects the water inlet of the auxiliary pump;The auxiliary pump Water outlet connect with the water inlet of the turbocharger;The water inlet of the water outlet of the turbocharger and the warm wind Connection;The water outlet of the warm wind is connect with the third water inlet of first water pump;
First exhaust pipeline is connected between first expansion tank and the high temperature heat sink;In first swelling water Second exhaust pipeline is provided between case and the engine cooling water jacket;In second expansion tank and the low temperature radiation Third gas exhaust piping is connected between device;
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 third flow path;
The first flow path passes sequentially through first water pump, the engine cooling water jacket, 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;
The second flow path passes sequentially through first water pump, the oil cooler, the high temperature heat sink, institute for coolant It states and first water pump is returned to by the second water inlet of first water pump after electronic thermostat main valve;
The third flow path for coolant pass sequentially through first water pump, the engine cooling water jacket the second water outlet, First water pump is returned to by the third water inlet of first water pump after the turbocharger;
The partial circulating cooling flowing path includes the 4th flow path and the 5th flow path;
4th flow path for coolant pass sequentially through first water pump, the engine cooling water jacket the first water outlet, First water pump is returned to by the second water inlet of first water pump after the auxiliary-valve of the electronic 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.
2. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The high temperature circulation cooling system further includes one or two in auxiliary pump or warm wind;The auxiliary pump is set to institute It states between the second water outlet of engine cooling water jacket and the turbocharger;The warm wind is set to the turbocharger Between the third water inlet of water outlet and first water pump.
3. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The third flow path passes sequentially through the second water outlet, described of first water pump, the engine cooling water jacket for coolant First water is returned to by the third water inlet of first water pump after auxiliary pump, the turbocharger and the warm wind Pump.
4. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The first check valve and first throttle valve are provided on the downtake pipe road;Is provided on the second exhaust pipe road Two throttle valves;Third throttle valve is provided on the third gas exhaust piping.
5. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The low-temperature circulating cooling system includes the 6th flow path, the 7th flow path and the 8th flow path;
6th flow path returns to institute after passing sequentially through second water pump, the BSG and the low-temperature radiator for coolant State the second water pump;
7th flow path returns after passing sequentially through second water pump, the charge air cooler and the low-temperature radiator for coolant Second water pump;
After 8th flow path passes sequentially through second water pump, the Electron pressurizing unit and the low-temperature radiator for coolant Return to second water pump.
6. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The engine cooling water jacket includes cylinder body water jacket and cylinder cover water jacket.
7. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: First water pump is switching regulator mechanical water pump;Second water pump is electronic water pump;The auxiliary pump is automatically controlled auxiliary water Pump.
8. the dual cycle cooling system improved structure according to claim 1 for including double expansion tanks, it is characterised in that: The delay circulating cooling system includes the 9th flow path, the tenth flow path and the 11st flow path;
9th flow path enters the electronic thermostat after the second water inlet of first water pump is passed sequentially through for coolant After main valve, into the water outlet of the high temperature heat sink, pass through the hair after being come out from the water inlet of the high temperature heat sink First water outlet of motivation cooling jacket enters the engine cooling water jacket;Coolant is from the of the engine cooling water jacket Two water outlets enter the auxiliary pump;After the turbocharger and the warm wind are sequentially entered after the auxiliary pump First water pump is returned to by the third entrance of first water pump;
Tenth flow path enters the water inlet of the oil cooler for the coolant from first pump outlet, from The oil cooler water outlet enters engine cooling water jacket by the first water outlet of engine cooling water jacket, from the hair The coolant that the second water outlet of motivation cooling jacket comes out passes sequentially through the auxiliary pump, the turbocharger and described again First water pump is returned to by the third water inlet of first water pump after warm wind;
The 11st flow path coolant pass sequentially through first water pump, the engine cooling water jacket the second water outlet, The first water is returned to by the third water inlet of first water pump after the auxiliary pump, the turbocharger and the warm wind Pump.
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