CN105257384A - Engine cooling system - Google Patents

Engine cooling system Download PDF

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Publication number
CN105257384A
CN105257384A CN201510679074.7A CN201510679074A CN105257384A CN 105257384 A CN105257384 A CN 105257384A CN 201510679074 A CN201510679074 A CN 201510679074A CN 105257384 A CN105257384 A CN 105257384A
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China
Prior art keywords
cooling system
water pump
cooling liquid
high temperature
water jacket
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CN201510679074.7A
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CN105257384B (en
Inventor
苏晓芳
张建操
张应兵
刘俊
孙国宾
陈友祥
李欢
朱浩杰
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 invention relates to an engine cooling system. The engine cooling system comprises a high-temperature circulating cooling system and a low-temperature circulating cooling system. The high-temperature circulating cooling system is provided with a large-circulation cooling liquid flow path, a small-circulation cooling liquid flow path and a delay-circulation cooling liquid flow path. An electronic control auxiliary water pump is additionally arranged for the high-temperature circulating cooling system so that delayed circulation can be achieved; the heating requirement of all parts can be better met after an engine is shut down; and the flow direction problem of cooling circulation between different parts is solved.

Description

A kind of engine-cooling system
Technical field
The invention belongs to automobile cooling system field, specifically refer to a kind of engine-cooling system.
Background technique
National governments promulgate more and more harsh standard to the oil consumption of motor, are such as defined in the year two thousand twenty requirement automobile main frame maker and continue to reduce oil consumption to 5.0L/100km; Fuel-economizing has become the development trend of world car, and in fuel-saving measures, a most important technology is exactly the supercharging miniaturization+Technology of Hybrid Electric Vehicle of motor.
In order to respond the regulation of local government, a kind of Engine Matching system more innovated must be found to complete this target.Because under the prerequisite of not losing power character, want that it 30% is an impossible mission substantially that oil consumption is declined on current basis.Therefore the face on the engine that proposes adopts mixed power system+electronics supercharging, by weak mixed and engine booster miniaturization, reaches with this requirement reducing oil consumption.Because whole system coupling is extremely complicated, corresponding car load design of Cooling System is also tending towards complicated.
Conventional engines cooling system, during engine operation, the heat that oil inflame produces except acting, thermal radiation, conduct except waste gas has been taken away, all the other cool by cooling system.Whole cool cycles is divided into two states: thermostat closed condition and thermostat opening state, and is divided into major cycle and short circle thus.
Motor is in and just starts working state, and water temperature is not also gone up, and now, thermostat is in closed condition, and motor is in short circle state; Along with water temperature raises gradually, the cured bag expanded by heating inside thermostat, thermostat is opened gradually, and the loop being communicated with radiator is opened, and then enters major cycle.
The shortcoming of prior art is, under the motor major cycle state of cooling, only has a major loop.Along with the continuous popularization of engines fuel-economizing technology, amount of parts integrated on motor increases gradually, as intercooler, BSG, Electron pressurizing unit, electronic water pump etc., these new integrated component, same needs cool, but the chilling temperature required for it, flow and control logic and engine cylinder-body, cylinder cap are completely different; In addition; along with the application of start-stop technology; such as the HyBoost motor of the exploitation such as Ricardo Inc. has quick start-stop function; to reduce engine consumption level; simple dependence switch type machinery water pump cannot meet the heating demands after motor shutdown; especially in temperature lower ground district, this defect is particularly outstanding.Therefore, traditional Cooling System Control Circuit can not meet the application of new technology.
In addition, traditional mechanical type thermostat response slowly, is opened, the water temperature of closing by motor is determined, be unfavorable for the warming-up of motor and the quick cooling of water temperature.
With water-cooled relatively, the technological scheme adopting air-cooled mode to cool intercooler, BSG, Electron pressurizing unit is also there is in prior art, but this air cooling way spatial requirement is high, high requirement is furnished with to whole engine compartment, layout difficulty is large, thermal equilibrium has a big risk, and generally needs repeatedly to improve just can reach ideal effect.Car load Environmental Conditions is changeable in addition, makes air cooling system be difficult to meet the demand of each operating mode of multiple Environmental Conditions; In addition, along with the application of start-stop technology, mechanical water pump cannot meet the heating demands after motor shutdown, and especially in temperature lower ground district, this defect is particularly outstanding.
As rapid starting/stopping motor; after motor is shut down; machinery water pump quits work; the heating demands that rear operator cabin shut down by motor cannot be met; especially in temperature lower ground district; under the operating mode of city, this defect is particularly outstanding, therefore traditional cooling control loop can not meet the application of new technology.
Summary of the invention
The object of the invention is by proposing improvement opportunity scheme to existing engine-cooling system; particularly solve the cooling problem of mixed power system+electronics supercharged engine; pass through the technical program; better can adapt to the heating requirement that rear each component shut down by motor; what solve cool cycles between different parts flows to problem, is specially adapted to such as Hyboost motor.
The present invention is achieved by the following technical solutions:
A kind of engine-cooling system, includes high temperature circulation cooling system and low-temperature circulating cooling system;
Described high temperature circulation cooling system includes swelling water tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket, switch type machinery water pump, electronic thermostat, machine oil cooler, automatically controlled auxiliary water pump and warm braw;
Described low-temperature circulating cooling system, includes described swelling water tank, low-temperature radiator, electronic water pump, Electron pressurizing unit, intercooler, turbosupercharger and BSG;
In described low-temperature circulating cooling system, three tunnels are divided into after the cooling liquid coming from described low-temperature radiator is pumped by described electronic water pump, described low-temperature radiator is got back to after flowing through described intercooler in one road, described low-temperature radiator is got back to after flowing through described turbosupercharger in one road, and described low-temperature radiator is got back to after flowing through described BSG, described Electron pressurizing unit successively in another road;
Described high temperature circulation cooling system has major cycle, short circle and delay and to circulate three kinds of cooling liquid streams;
In described delay circulation, described switch type mechanical water air pump inoperative, under the driving of described automatically controlled auxiliary water pump, described switch type machinery water pump is entered after the cooling liquid coming from described cylinder cover water jacket flows through described automatically controlled auxiliary water pump, described warm braw, then cooling liquid is divided into three tunnels, the first via gets back to described cylinder cover water jacket after flowing through described machine oil cooler, and described cylinder cover water jacket is got back to after flowing through described cylinder body water jacket in the second road, gets back to described cylinder cover water jacket after the 3rd road flows through described electronic thermostat.
Preferably, in described delay circulation, the in running order or off position of described electronic thermostat; When described electronic thermostat is in running order, the 3rd tunnel cooling liquid gets back to described cylinder cover water jacket after flowing through the main valve of described electronic thermostat, described high temperature heat sink;
When described electronic thermostat is in off position, get back to described cylinder cover water jacket after the 3rd tunnel cooling liquid flows through the auxiliary-valve of described electronic thermostat and without described high temperature heat sink.
Preferably, in described major cycle, described automatically controlled auxiliary water air pump inoperative, cooling liquid in described high temperature heat sink is pumped into described machine oil cooler and described cylinder body water jacket by the main valve of described electronic thermostat by described switch type machinery water pump respectively, cooling liquid in described machine oil cooler gets back to described high temperature heat sink, cooling liquid in described cylinder body water jacket is divided into two-way after flowing through described cylinder cover water jacket, wherein described high temperature heat sink is got back on a road, an other road flows through described automatically controlled auxiliary water pump, described turbosupercharger, described switch type machinery water pump is got back to after described warm braw.
Preferably, in described short circle, described automatically controlled auxiliary water air pump inoperative, described cylinder cover water jacket, cooling liquid in described machine oil cooler enters described switch type machinery water pump through the auxiliary-valve of described electronic thermostat, cooling liquid in described warm braw enters described switch type machinery water pump, cooling liquid is pumped into described machine oil cooler and described cylinder body water jacket by described switch type machinery water pump respectively, cooling liquid in described cylinder body water jacket is divided into two-way after flowing through described cylinder cover water jacket, described electronic thermostat is got back in one tunnel together with the cooling liquid in described machine oil cooler, another road flows through described automatically controlled auxiliary water pump, described warm braw is entered after described turbosupercharger.
Preferably, above-mentioned engine-cooling system also comprises water pipe, and described swelling water tank supplements cooling liquid through described water pipe to described electronic water pump and described switch type machinery water pump.
Preferably, above-mentioned engine-cooling system also comprises gas exhaust piping, and described low-temperature radiator, described high temperature heat sink are communicated with described swelling water tank through described gas exhaust piping with described cylinder cover water jacket.
Preferably, on described gas exhaust piping, between described low-temperature radiator and described swelling water tank, be in series with one-way valve and throttle valve, and/or described high temperature heat sink and be in series with one-way valve and throttle valve between described cylinder cover water jacket and described swelling water tank.
Preferably, described low-temperature radiator is communicated with described swelling water tank from described high temperature heat sink by different entrances.
The invention has the beneficial effects as follows:
In the engine-cooling system of the application; also add except large and small cycles and postpone circulation; after motor is shut down; switch type machinery water pump and electronic water pump all quit work; now automatically controlled auxiliary water pump is opened; the cooling liquid that drives automatically controlled auxiliary water pump continues to flow through heater and continues heating to operator cabin, thus meets heating demands better and energy saving.This programme effectively can complete the coupling work of engine-cooling system, and make car load thermal equilibrium be in a very good state, circuit design is reasonable; From the angle of car load heat management, significantly reduce the oil consumption of motor.And in low-temperature circulating cooling system, in coolant flow direction, the series-parallel connection mode of BSG, Electron pressurizing unit, intercooler and turbosupercharger, respective cooling requirement can be met, and cooling liquid water-exit temperature is not high, makes low-temperature circulating coolant temperature all remain on less than 50 DEG C, effectively ensure that Engine Inlet Temperature and intake efficiency, be conducive to playing engine power performance, prevent pinking.
Further, in delay circulation, by controlling the work of electronic thermostat and not working, be equivalent to achieve the inner large and small circulation of delay circulation, the cooling requirement of different component under more adapting to different operating mode.
Further, low-temperature radiator gas exhaust piping is built with one-way valve and throttle valve, when preventing that in high temperature circulation, pressure is higher, high-temperature water adverse current enters low-temperature circulating, and throttle valve prevents the cooling liquid that in too much swelling water tank, temperature is higher from participating in low-temperature circulating in addition.
Further, electronic thermostat and switch type machinery water pump with the use of, can rapid warming-up be realized.
Further, low-temperature radiator is communicated with swelling water tank with high temperature heat sink by different entrances, can prevent the gas exhaust piping overpressure of high temperature circulation cooling system and affect the exhaust of low-temperature circulating cooling system.
Further, in the application, after motor is shut down, machinery water pump and low-temperature circulating in electronic water pump quit work, automatically controlled auxiliary electron water pump is started working, electronic thermostat controls electrical heating rod heating wax bag by ECU, main valve is opened, auxiliary-valve is closed, cylinder block and head water jacket, high temperature heat sink, the cooling liquid that in machine oil cooler, temperature is higher pumps rear continuation to Electron pressurizing unit by automatically controlled auxiliary electron water pump, turbosupercharger cools, flow through heater afterwards, heating is continued to operator cabin, meet the demand of turbosupercharger delay chilling, motor continues to support warm braw heating system after shutting down simultaneously, improve the usability of car load.
Accompanying drawing explanation
Fig. 1 is the engine-cooling system frame diagram of first embodiment of the present invention;
Fig. 2 is the engine-cooling system frame diagram of second embodiment of the present invention.
Description of reference numerals
1 swelling water tank, 2 low-temperature radiators, 3BSG, 4 intercoolers, 5 electronic water pumps, 6 throttle valve, 7 one-way valves, 8 high temperature heat sink, 9 electronic thermostats, 10 switch type machinery water pumps, 11 machine oil cooler, 12 cylinder body water jackets, 13 cylinder cover water jackets, 14 automatically controlled auxiliary water pumps, 15 Electron pressurizing units, 16 turbosupercharger, 17 warm braws, 18 one-way valves, 19 throttle valve, 20 water outlets.
Embodiment
Describe technological scheme of the present invention in detail by the following examples, following embodiment is only exemplary, only can be used for explaining and technological scheme of the present invention being described, and can not be interpreted as being the restriction to technical solution of the present invention.
Critical component defines
BSG:(BeltStarterGenerator) belt start generator system: can realize motor and play/stop a function, realize energy regenerating, auxiliary increasing such as to turn round at the function.
Electron pressurizing unit: (ElectricSuper-ChargerESC) a kind of electronic match product that can improve car engine ignition and combustion regime, Main Function improves the low side moment of torsion of motor and the responsiveness of moment of torsion, within the scope of 0.25S, the rotating speed of motor can be dragged to 70000 turns, need air to cool motor, be integrated in air-strainer inside.
Electronic water pump: a kind of motor-driven water pump, adopts piezoelectric material to be used as power device, can realize driving electronization from controlling to, and adopts electronic integration system to control fluid transport, realizes the adjustability of liquid transporting, accuracy.
High temperature heat sink: high temperature heat sink is a part for automobile cooling system, and primarily of part assemblies such as intake chamber, water-supplying chamber, main leaf and radiator centres, Main Function is the high-temperature water in cooled engine water jacket, belongs to High-temperature cooling circulation.
Low-temperature radiator: low-temperature radiator is a part for automobile cooling system, primarily of part assemblies such as intake chamber, water-supplying chamber, main leaf and radiator centres, Main Function is the water in cooled engine intercooler, BSG, ESC, turbosupercharger, belongs to low temperature refrigeration circulation.
Swelling water tank: a kind of parts of automobile cooling system, Main Function is used to store cooling liquid, this patent uses enclosed swelling water tank, cooling liquid in kettle also participates in car load cooling water circulation, in addition, swelling water tank also plays to the scavenging action of heat radiator assembly, middle cold heat sink assembly and motor.
Turbosupercharger: a kind of air compressor, air inflow is increased by pressurized air, the waste gas inertia impulsive force utilizing motor to discharge is to promote the turbine in turbine chamber, turbine drives again coaxial impeller, the air that impeller force feed is sent here by air filter pipeline makes it supercharging and enters cylinder, and Main Function is the rotating speed increasing motor.
Intercooler: the auxiliary equipment of engine turbine supercharging, its role is to the scavenging efficiency improving motor, is the important set compound component of engine supercharging system.
Electronic thermostat: a kind of novel motor temperature controlling device, in this system, the work of the circulating cooling fan of coolant temperature adjustment, cooling liquid determines by engine load and is controlled by control unit of engine, relative to traditional engine cooling apparatus, there is better fuel economy and lower hydrocarbon emission.
Oil cooler: a kind of thermantidote of motor, Main Function is used to the motor heating component such as cooled engine crankcase, clutch, valve assembly.
In ensuing description, as shown in Figures 1 and 2, the major cycle cooling liquid stream in high temperature circulation cooling system and the coolant flow direction in low-temperature circulating cooling system is represented to be with the solid line of arrow, short circle coolant flow direction in high temperature circulation cooling system is represented to be with the dashed line of arrow, to be with the coolant flow direction in the tubular wire representative delay circulation of arrow, water pipe coolant flow direction in low-temperature circulating cooling system and high temperature circulation cooling system is represented to be with the dot and dash line of arrow, gas exhaust piping gas flow direction in low-temperature circulating cooling system and high temperature circulation cooling system is represented to be with the dotted line of arrow.
With reference to figure 1, the engine-cooling system of first embodiment of the present invention, includes high temperature circulation cooling system and low-temperature circulating cooling system.Low-temperature circulating cooling system, includes swelling water tank 1, low-temperature radiator 2, electronic water pump 5, Electron pressurizing unit 15, intercooler 4, turbosupercharger 16 and BSG3; High temperature circulation cooling system includes swelling water tank 1, high temperature heat sink 8, cylinder body water jacket 12, cylinder cover water jacket 13, switch type machinery water pump 10, electronic thermostat 9, machine oil cooler 11, automatically controlled auxiliary water pump 14 and warm braw 17.Although the high temperature circulation cooling system of the present embodiment and low-temperature circulating cooling system share a swelling water tank 1 as being vented and water replenishing device, but high temperature circulation cooling system of the present invention and low-temperature circulating cooling system run alone, each circulation has independently water pump and radiator, both nonintervention mutually, and this is that the design of current engine-cooling system is unexistent, and after adding BSG3 and the component such as Electron pressurizing unit 15, turbosupercharger 16, the design of the series parallel connection of pipeline, trend, tandem, cooling logic just becomes extremely important, and complicated.The cooling logic design of this programme can complete the different cooling requirements of the component such as BSG3 and intercooler 4, Electron pressurizing unit 15, turbosupercharger 16 and engine cylinder-body, cylinder cap effectively.
Low-temperature circulating cooling system is used for cooling BSG3 and intercooler 4, Electron pressurizing unit 15, turbosupercharger 16.In low-temperature circulating cooling system, three tunnels are divided into after the cooling liquid coming from low-temperature radiator 2 is pumped by electronic water pump 5, wherein low-temperature radiator 2 is got back to after flowing through turbosupercharger 16 in a road, low-temperature radiator 2 is got back to after flowing through intercooler 4 in one road, low-temperature radiator 2 is got back to after flowing through BSG3, Electron pressurizing unit 15 successively in one tunnel, and this series-parallel connection stream ensure that the cooling requirement of four, in low-temperature circulating cooling system, the power of cooling liquid comes from the electronic water pump 5 that ECU (electronic control unit) controls, low engine speeds can be met, high load or motor BSG3 and intercooler 4 when carrying out thermal starting by BSG3 front end belt, turbosupercharger 16, the radiating requirements of Electron pressurizing unit 15, because generally speaking, BSG3 for the traffic demand of cooling liquid lower than intercooler 4, and the cooling of turbosupercharger 16 requires the highest, therefore by intercooler 4, turbosupercharger 16 cools as independent branch road, connected with Electron pressurizing unit 15 by BSG3 to cool be favourable simultaneously, effectively ensure that Engine Inlet Temperature and intake efficiency, be conducive to playing engine power performance, prevent pinking.In addition, in low-temperature circulating cooling system, the cooling liquid in swelling water tank 1 supplements cooling liquid by the water pipe in electronic water pump 5 front to electronic water pump 5, and before can preventing electronic water pump 5, hypotony produces cavitation erosion.In addition, low-temperature radiator 2 is communicated with swelling water tank 1 through gas exhaust piping, and on gas exhaust piping, be in series with one-way valve 7 and throttle valve 6 between low-temperature radiator 2 and swelling water tank 1, the cooling liquid being mixed with bubble in low-temperature radiator 2 enters swelling water tank due to the pressure difference between swelling water tank 1 and low-temperature radiator 2 by throttle valve 6 and one-way valve 7.
High temperature circulation cooling system has major cycle, short circle and delay and to circulate three kinds of cooling liquid streams.Engine water outlet 20 water temperature higher than the first predetermined temperature, such as 105 degrees Celsius time, high temperature circulation cooling system is in major cycle state; Engine water outlet 20 water temperature lower than the second predetermined temperature, such as 97 degrees Celsius time, high temperature circulation cooling system is in short circle state; Water outlet 20 water temperature between the first predetermined temperature and the second predetermined temperature, such as higher than 97 degrees Celsius lower than 105 degrees Celsius time, large and small circulation exists simultaneously; Motor is shut down in the rear scheduled time, and such as, in 15 minutes, the delay circulation after motor shutdown is started working.According to different engine model, predetermined temperature and the scheduled time can be different.
After engine start, engine water outlet 20 water temperature higher than the first predetermined temperature, such as 105 degrees Celsius time, the main valve of electronic thermostat 9 is opened, auxiliary-valve close, cooling liquid enters major cycle state.In major cycle state, automatically controlled auxiliary water pump 14 does not work, now can be regarded as the pipeline allowing cooling liquid to pass through, cooling liquid in high temperature heat sink 8 is pumped into machine oil cooler 11 and cylinder body water jacket 12 by the main valve of electronic thermostat 9 by switch type machinery water pump 10 respectively, cooling liquid in machine oil cooler 11 gets back to high temperature heat sink 8 realization circulation through the water outlet 20 of motor, cooling liquid in cylinder body water jacket 12 is divided into two-way after flowing through cylinder cover water jacket 13, wherein a road is got back to high temperature heat sink 8 through water outlet 20 and is realized circulation, an other road flows through automatically controlled auxiliary water pump 14, turbosupercharger 16, get back to switch type machinery water pump 10 after warm braw 17 and realize circulation.Automatically controlled auxiliary water pump keeps not working before engine misses.In major cycle, the coolant temperature that cylinder cover water jacket 13 flows out meets the coolant temperature requirement of turbosupercharger 16 completely, also improves temperature and the flow of the cooling liquid entering warm braw 17 simultaneously, improves warm braw effect.
Engine water outlet 20 water temperature lower than the second predetermined temperature, such as 97 degrees Celsius time, the main valve of electronic thermostat 9 is closed, and auxiliary-valve is opened, and high temperature circulation cooling system is in short circle state.In short circle, automatically controlled auxiliary water pump 14 does not work, and the cooling liquid of switch type machinery water pump 10 comes from the backwater of the backwater of machine oil cooler 11, the backwater of cylinder cover water jacket 13 and warm braw 17.Wherein, cylinder cover water jacket 13, cooling liquid in machine oil cooler 11 enters switch type machinery water pump 10 through the auxiliary-valve of electronic thermostat 9 after water outlet 20 confluxes, cooling liquid in warm braw 17 directly enters switch type machinery water pump 10, cooling liquid is pumped into machine oil cooler 11 and cylinder body water jacket 12 by switch type machinery water pump 10 respectively, cooling liquid in cylinder body water jacket 12 is divided into two-way after flowing through cylinder cover water jacket 13, before the auxiliary-valve that electronic thermostat 9 is got back on one tunnel together with the cooling liquid in machine oil cooler 11 arrives switch type machinery water pump 10, another road flows through automatically controlled auxiliary water pump 14, warm braw 17 is entered after turbosupercharger 16, cooling liquid in warm braw 17 returns switch type machinery water pump 10.Before engine misses, automatically controlled service pump 14 does not work, and now can be regarded as one section of pipeline.
When the water temperature of water outlet 20 is between the first predetermined temperature and the second predetermined temperature, above-mentioned major cycle, short circle coexist.
And after tail-off, switch type machinery water pump 10 does not work, after a predetermined time, such as 15min, automatically controlled auxiliary water pump 14 is powered by HyBoost system battery or other circuit and is started working, and high temperature circulation cooling system enters and postpones periodic duty state.In the delay circulation of the embodiment of first shown in Fig. 1, electronic thermostat 9 is in running order, electronic thermostat 9 is by electrical heating rod heating, main valve is opened, auxiliary-valve is closed, under the driving of automatically controlled auxiliary water pump 14, from high temperature heat sink 8, machine oil cooler 11, cooling liquid in cylinder cover water jacket 13 all converges to the cylinder cover water jacket 13 of head exhaust side, then the cooling liquid of cylinder cover water jacket 13 flows through automatically controlled auxiliary water pump 14, switch type machinery water pump 10 is entered after warm braw 17, cooling liquid is divided into three tunnels after flowing out switch type machinery water pump 10, cylinder cover water jacket 13 is got back to through water outlet 20 after the first via flows through machine oil cooler 11, cylinder cover water jacket 13 is got back to after flowing through cylinder body water jacket 12 in second road, 3rd road flows through the main valve of electronic thermostat 9, cylinder cover water jacket 13 is got back to through water outlet 20 after high temperature heat sink 8.
With reference to figure 2, with the embodiment of first in Fig. 1 unlike, in the embodiment of second shown in Fig. 2, in delay circulation, electronic thermostat 9 is in off position, now the main valve of electronic thermostat 9 is closed, and auxiliary-valve is opened, and directly gets back to cylinder cover water jacket 13 and without high temperature heat sink 8 through water outlet 20 after the 3rd tunnel cooling liquid coming from switch type machinery water pump 10 flows through the auxiliary-valve of electronic thermostat 9.
The effect of the delay circulation in Fig. 1 and Fig. 2 is; after motor is shut down; switch type machinery water pump 10 and electronic water pump 5 all quit work; now automatically controlled auxiliary water pump 14 is opened; the cooling liquid that drives automatically controlled auxiliary water pump 14 continues to flow over warm braw 17 pairs of operator cabins and continues heating, can continue to utilize cooling liquid waste heat to heat, meet heating requirement under motor outage state; continue to cool motor simultaneously, improve capacity usage ratio and warm braw effect.And be no matter major cycle, short circle in high temperature circulation cooling system and postpone circulation, or the low-temperature circulating in low-temperature circulating cooling system, all effectively can complete the coupling work of engine-cooling system, make car load thermal equilibrium be in a very good state, circuit design is reasonable; From the angle of car load heat management, significantly reduce the oil consumption of motor.
And in delay circulation, by controlling the work of electronic thermostat 9 and the two states that do not work, be equivalent to separate again through the major cycle of high temperature heat sink 8 and the short circle without high temperature heat sink 8 in delay circulation inside, the cooling requirement of different component under more adapting to different operating mode.Like this, the heating demands in operator cabin or engine cooling demand can be adapted to respectively.Therefore, this programme also can be regarded as a kind of new method that controls engine-cooling system.
Similar with the water pipe in low-temperature circulating cooling system, also there is water pipe in high temperature circulation cooling system, swelling water tank 1 supplements cooling liquid through water pipe to switch type machinery water pump 10.
Similar with the gas exhaust piping in low-temperature circulating cooling system, also there is gas exhaust piping in high temperature circulation cooling system, high temperature heat sink 8 is communicated with 1 through gas exhaust piping with swelling water tank with cylinder cover water jacket 13.And on gas exhaust piping, high temperature heat sink 8 and be in series with one-way valve 18 and throttle valve 19 between cylinder cover water jacket 13 and swelling water tank 1.Low-temperature radiator 2 and high temperature heat sink 8 are communicated with swelling water tank 1 by different entrances and realize being vented, and can prevent the gas exhaust piping overpressure of high temperature circulation cooling system and affect the exhaust of low-temperature circulating cooling system.In two embodiments of the application, low-temperature circulating cooling system and high temperature circulation cooling system all have employed water pipe, gas exhaust piping, and be all equipped with throttle valve and one-way valve in gas exhaust piping, in fact low-temperature circulating cooling system or high temperature circulation cooling system also can coordinate separately water pipe, gas exhaust piping, one-way valve and throttle valve.Advantage in the application is, low-temperature radiator gas exhaust piping is built with one-way valve 7 and throttle valve 6, when can prevent that in high temperature circulation, pressure is higher, high-temperature water adverse current enters low-temperature circulating, and throttle valve 6 prevents the cooling liquid that in too much swelling water tank 1, temperature is higher from participating in low-temperature circulating in addition.And electronic thermostat 9 and switch type machinery water pump 10 with the use of, can rapid warming-up be realized.
Electron pressurizing unit 15, turbosupercharger 16 are arranged in low-temperature circulating cooling system, utilize the cooling liquid in low-temperature circulating system can meet both cooling requirements completely.
The above is only the description of the preferred embodiment of the present invention; should be understood that; due to the finiteness of literal expression; and objectively there is unlimited concrete structure; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (8)

1. an engine-cooling system, is characterized in that: include high temperature circulation cooling system and low-temperature circulating cooling system;
Described high temperature circulation cooling system includes swelling water tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket, switch type machinery water pump, electronic thermostat, machine oil cooler, automatically controlled auxiliary water pump and warm braw;
Described low-temperature circulating cooling system, includes described swelling water tank, low-temperature radiator, electronic water pump, Electron pressurizing unit, intercooler, turbosupercharger and BSG;
In described low-temperature circulating cooling system, three tunnels are divided into after the cooling liquid coming from described low-temperature radiator is pumped by described electronic water pump, described low-temperature radiator is got back to after flowing through described intercooler in one road, described low-temperature radiator is got back to after flowing through described turbosupercharger in one road, and described low-temperature radiator is got back to after flowing through described BSG, described Electron pressurizing unit successively in another road;
Described high temperature circulation cooling system has major cycle, short circle and delay and to circulate three kinds of cooling liquid streams;
In described delay circulation, described switch type mechanical water air pump inoperative, under the driving of described automatically controlled auxiliary water pump, described switch type machinery water pump is entered after the cooling liquid coming from described cylinder cover water jacket flows through described automatically controlled auxiliary water pump, described warm braw, then cooling liquid is divided into three tunnels, the first via gets back to described cylinder cover water jacket after flowing through described machine oil cooler, and described cylinder cover water jacket is got back to after flowing through described cylinder body water jacket in the second road, gets back to described cylinder cover water jacket after the 3rd road flows through described electronic thermostat.
2. engine-cooling system according to claim 1, is characterized in that: in described delay circulation, the in running order or off position of described electronic thermostat;
When described electronic thermostat is in running order, the 3rd tunnel cooling liquid gets back to described cylinder cover water jacket after flowing through the main valve of described electronic thermostat, described high temperature heat sink;
When described electronic thermostat is in off position, get back to described cylinder cover water jacket after the 3rd tunnel cooling liquid flows through the auxiliary-valve of described electronic thermostat and without described high temperature heat sink.
3. engine-cooling system according to claim 1 and 2, is characterized in that:
In described major cycle, described automatically controlled auxiliary water air pump inoperative, cooling liquid in described high temperature heat sink is pumped into described machine oil cooler and described cylinder body water jacket by the main valve of described electronic thermostat by described switch type machinery water pump respectively, cooling liquid in described machine oil cooler gets back to described high temperature heat sink, cooling liquid in described cylinder body water jacket is divided into two-way after flowing through described cylinder cover water jacket, wherein described high temperature heat sink is got back on a road, an other road flows through described automatically controlled auxiliary water pump, described turbosupercharger, described switch type machinery water pump is got back to after described warm braw.
4. engine-cooling system according to claim 1 and 2, is characterized in that:
In described short circle, described automatically controlled auxiliary water air pump inoperative, described cylinder cover water jacket, cooling liquid in described machine oil cooler enters described switch type machinery water pump through the auxiliary-valve of described electronic thermostat, cooling liquid in described warm braw enters described switch type machinery water pump, cooling liquid is pumped into described machine oil cooler and described cylinder body water jacket by described switch type machinery water pump respectively, cooling liquid in described cylinder body water jacket is divided into two-way after flowing through described cylinder cover water jacket, described electronic thermostat is got back in one tunnel together with the cooling liquid in described machine oil cooler, another road flows through described automatically controlled auxiliary water pump, described warm braw is entered after described turbosupercharger.
5. engine-cooling system according to claim 1 and 2, is characterized in that: also comprise water pipe, and described swelling water tank supplements cooling liquid through described water pipe to described electronic water pump and described switch type machinery water pump.
6. engine-cooling system according to claim 1 and 2, is characterized in that: also comprise gas exhaust piping, and described low-temperature radiator, described high temperature heat sink are communicated with described swelling water tank through described gas exhaust piping with described cylinder cover water jacket.
7. engine-cooling system according to claim 6, it is characterized in that: on described gas exhaust piping, one-way valve and throttle valve is in series with between described low-temperature radiator and described swelling water tank, and/or described high temperature heat sink and be in series with one-way valve and throttle valve between described cylinder cover water jacket and described swelling water tank.
8. engine-cooling system according to claim 6, is characterized in that: described low-temperature radiator is communicated with described swelling water tank from described high temperature heat sink by different entrances.
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