CN106948915B - A kind of engine-cooling system - Google Patents
A kind of engine-cooling system Download PDFInfo
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- CN106948915B CN106948915B CN201710198069.3A CN201710198069A CN106948915B CN 106948915 B CN106948915 B CN 106948915B CN 201710198069 A CN201710198069 A CN 201710198069A CN 106948915 B CN106948915 B CN 106948915B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P2005/105—Using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
- F01P2005/125—Driving auxiliary pumps electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2031/00—Fail safe
- F01P2031/30—Cooling after the engine is stopped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2050/00—Applications
- F01P2050/24—Hybrid vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/02—Intercooler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/04—Lubricant cooler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/12—Turbo charger
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The present invention relates to a kind of engine-cooling systems, include high temperature circulation cooling system and low-temperature circulating cooling system；The high temperature circulation cooling system has systemic circulation, partial circulating and delay three kinds of coolant liquid flow paths of circulation.In systemic circulation and partial circulating, coolant liquid shunts after cylinder cover water jacket, and a part enters cylinder body water jacket, and a part enters warm wind；High temperature circulation cooling system and low-temperature circulating cooling system respectively use individual expansion tank.By increasing electronic control water pump for high temperature circulation cooling system and realizing that delay circulation and coolant liquid branch to cylinder body water jacket, warm wind after cylinder cover water jacket; the heating requirement of each components after engine is shut down can preferably be adapted to; solve the problems, such as flowing to for cooling cycle between different components; by the way that individual expansion tank is arranged, combustion knock probability can reduce.
Description
Technical field
The invention belongs to automobile cooling system field, in particular to a kind of engine-cooling systems.
Background technique
National governments promulgate that more and more harsh standard, such as regulation require vehicle main frame in the year two thousand twenty 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 pressurization miniaturization+Technology of Hybrid Electric Vehicle.
In response to the regulation of local government, it is necessary to find the Engine Matching system that one kind is more innovated to complete this
Target.Because under the premise of not losing dynamic property, want oil consumption on the basis of at present decline 30% substantially one can not
Capable of completing for task.Therefore propose that face is increased using hybrid power system+electronics pressurization 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 be complicated.
Conventional engines cooling system, when engine operation, the heat that fuel burning generates is in addition to acting, heat radiation, biography
It leads exhaust gas to take away outside, remaining is cooled down by cooling system.Entire cooling cycle is divided into two states: thermostat closes
Closed state and thermostat open state, and thus it is divided into systemic circulation and partial circulating.
Engine is in just starting working condition, and water temperature is gone up not yet to be come, at this point, thermostat is in close state, hair
Motivation is in partial circulating state；As water temperature gradually rises, cured packet expanded by heating inside thermostat, thermostat is gradually opened,
The circuit for being connected to radiator is opened, and then enters systemic circulation.
Disadvantage of the prior art is that under the engine systemic circulation state of cooling, an only major loop.With engine section
The continuous popularization of oil tech, the amount of parts integrated on engine gradually increases, such as intercooler, BSG, Electron pressurizing unit, electricity
Sub- water pump etc., these new integrated components also need to be cooled down, still, required cooling temperature, flow with
And control logic and engine cylinder body, cylinder cap it is completely different；In addition, with the application of start-stop technology, such as Ricardo Inc. etc.
The HyBoost engine of exploitation has quick start-stop function, simple to rely on switching regulator mechanical water pump to reduce engine consumption level
The heating demands after engine is shut down are unable to satisfy, especially in the lower area of temperature, this defect is especially prominent.Therefore,
Traditional Cooling System Control Circuit is no longer satisfied the application of new technology.
In addition, cylinder body and the cooling requirement of cylinder cap are also different, cylinder body water temperature is optimally maintained at 95 DEG C -105 DEG C, can maintain
Machine oil reduces frictional work in lower viscosity, so that the oil consumption for reducing engine is horizontal；Cylinder cap water temperature is optimally maintained at 85 DEG C of left sides
Intake efficiency can be improved in the right side, to improve the dynamic property of engine.But the cooling liquid stream of current cooling system cylinder block and head
Measure identical, temperature is essentially identical, so the economical and dynamic property of engine cannot be taken into account.
Again, engine with supercharger pinking is currently the most intractable technical problem of domestic and international automobile industry, one of reason
It is that intake air temperature is excessively high or unstable.Currently, cold mode is better than cold mode in air-cooled in water cooling, but the water inlet of water cooling intercooler
(coolant liquid) temperature will have a direct impact on the intake air temperature of engine.The intake air temperature of engine generally require control 60 DEG C with
Under, it otherwise can cause combustion knock or ECU is caused to turn round (limitation torque measure) to the limit of transmitter, therefore the cooling of intercooler follows
Ring generally can individually arrange low-temperature circulating.And low-temperature circulating coolant temperature has to be lower than 55 DEG C, preferably lower than 50 DEG C, but practical
Under upper many operating conditions, the inflow temperature of intercooler is more than above-mentioned limit value (55 or 50 DEG C).One of reason for that is followed for low temperature
Although ring and high temperature circulation have individual radiator, but share an expansion tank, lead to the high temperature coolant in expansion tank
Into low-temperature circulating, the inflow temperature of intercooler is influenced, reason is: (1) the cold heat dissipation in into coolant liquid of intercooler
Device and expansion tank, although the flow of expansion tank is smaller, cold heat sink temperature in the coolant temperature ratio in expansion tank
Degree is generally higher by 50 DEG C or more, reaches as high as 100 DEG C；(2) water pump of low-temperature circulating is electronic water pump, and changed power is big, changes
Speed is fast, causes the moisturizing bypass flow of expansion tank extremely unstable, therefore the moisturizing of expansion tank is intercooler inflow temperature
The main reason for high and unstable.
Finally, traditional mechanical thermostat response is slowly, unlatching, closing are determined by the water temperature of engine, are unfavorable for
The warming-up of engine and the rapid cooling of water temperature.
Relatively with water cooling, in the prior art there is also by the way of air-cooled to intercooler, BSG, Electron pressurizing unit into
The cooling technical solution of row, but this air cooling way space requirement is high, has higher requirements to the arrangement of entire enging cabin, arranges
Difficulty is big, and thermal balance risk is big, generally requires to be iteratively improved and can be only achieved ideal effect.In addition vehicle use environment is changeable, makes
Air cooling system the needs of being difficult to meet each operating condition of a variety of use environments；In addition, with the application of start-stop technology, mechanical water pump without
Method meets the heating demands after engine is shut down, and especially in the lower area of temperature, this defect is especially prominent.
Cylinder cover water jacket design is influenced by combustion chamber, air flue space, and the influence of casting technique, cylinder cover water jacket structure cannot
Guarantee the equilibrium of coolant rate in cylinder cover water jacket, and because the combustion characteristics of internal combustion engine will form one in cylinder cover water jacket end
(because of coolant liquid, circulation is bad here, and temperature is easy aggregation, and water temperature is than engine water outlet water temperature herein for thermal self-restraint stress
High 5 DEG C or so).Can rapidly it rise in poles bad working environments, cylinder cap end part water temperatures such as climbings, 17 DEG C of left sides higher than water outlet water temperature
It is right.At this time the practical water temperature experienced of electronic thermostat wax packet is the water temperature of engine water outlet, thus cannot be normally-open,
Cooling system heat dissipation capacity cannot be increased in time, lead to thermal balance shakiness and exceeded.
Summary of the invention
The purpose of the present invention is it is dynamic especially to solve mixing by proposing improved technology scheme to existing engine-cooling system
Force system+electronics engine with supercharger cooling problem can be adapted to preferably each zero after engine is shut down by the technical program
The heating requirement of component, solves the problems, such as flowing to for cooling cycle between different components, starts especially suitable for such as Hyboost
Machine.
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；
The high temperature circulation cooling system include high-temperature expansion water tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket,
Water temperature sensor, switching regulator mechanical water pump, electronic thermostat, oil cooler, electronic control water pump, Electron pressurizing unit, turbine
Booster and warm wind；
The low-temperature circulating cooling system, include low-temperature expansion water tank, low-temperature radiator, electronic water pump, intercooler and
BSG；
The high temperature circulation cooling system has systemic circulation, partial circulating and delay three kinds of coolant liquid flow paths of circulation；
In the systemic circulation, the electronic control water air pump inoperative, the switching regulator mechanical water pump passes through the electronics
Coolant liquid in the high temperature heat sink is pumped into the oil cooler and the cylinder cover water jacket by the main valve of thermostat respectively,
Coolant liquid in the oil cooler returns to the high temperature heat sink, and the coolant liquid in the cylinder cover water jacket flows through cylinder cap air inlet
Side, head exhaust are divided into two-way behind side, wherein returning to the high temperature heat sink after flowing through the cylinder body water jacket all the way, in addition all the way
The switching regulator machine is returned to after flowing through the electronic control water pump, the Electron pressurizing unit, the turbocharger, the warm wind
Tool water pump；
Water temperature sensor is set at the head exhaust side water temperature highest point, in the head exhaust side water temperature highest point
Place returns the switching regulator mechanical water pump by connecting at pipeline and the wax packet of the electronic thermostat；
In the partial circulating, the electronic control water air pump inoperative, in the cylinder body water jacket, the oil cooler
Coolant liquid enters the switching regulator mechanical water pump through the auxiliary-valve of the electronic thermostat, and the coolant liquid in the warm wind enters institute
Switching regulator mechanical water pump is stated, coolant liquid is pumped into the oil cooler and the cylinder head water by the switching regulator mechanical water pump respectively
It covers, the coolant liquid in the cylinder cover water jacket is divided into two-way after flowing through cylinder cap air inlet side, head exhaust side, flows through the cylinder body all the way
The electronic thermostat is returned to after water jacket together with the coolant liquid in the oil cooler, another way flows through the electronic control
Enter the warm wind after water pump, the Electron pressurizing unit, the turbocharger；
In delay circulation, the switching regulator mechanical water air pump inoperative, under the driving of the electronic control water pump,
From the coolant liquid of the cylinder cover water jacket flow through the electronic control water pump, the Electron pressurizing unit, the turbocharger,
Enter the switching regulator mechanical water pump after the warm wind, then coolant liquid is divided into three tunnels, the first via flow through the oil cooler,
The cylinder cover water jacket is returned to after the cylinder body water jacket, the second tunnel is returned directly to the cylinder cover water jacket, and third road flows through the electronics
The cylinder cover water jacket is returned to after thermostat, the cylinder body water jacket；
The high temperature circulation cooling system and the low-temperature circulating cooling system are respectively provided with water pipe, and the low temperature is swollen
Swollen water tank through the water pipe to the electronic water pump supplement coolant liquid, the high-temperature expansion water tank through the water pipe to
The switching regulator mechanical water pump supplements coolant liquid.
Preferably, in the delay circulation, when the electronic thermostat is in running order, third road coolant liquid is flowed through
The cylinder cover water jacket is returned to after the main valve of the electronic thermostat, the high temperature heat sink, the cylinder body water jacket.
Preferably, in the low-temperature circulating cooling system, the coolant liquid in the low-temperature radiator is by the electronic water
It is pumped into the intercooler, returns to the low-temperature radiator after then flowing through the BSG.
Preferably, the high temperature circulation cooling system and the low-temperature circulating cooling system are respectively provided with gas exhaust piping, institute
State low-temperature radiator be connected to through the gas exhaust piping with the low-temperature expansion water tank, the high temperature heat sink and the cylinder cover water jacket
It is connected to through the gas exhaust piping with the high-temperature expansion water tank.
Preferably, on the gas exhaust piping, section is in series between the low-temperature radiator and the low-temperature expansion water tank
Valve is flowed, and/or is in series with check valve and throttle valve between the high temperature heat sink and the high-temperature expansion water tank, and/or described
Throttle valve is in series between cylinder cover water jacket and the high-temperature expansion water tank.
Preferably, in the systemic circulation and the partial circulating, the coolant rate of the cylinder body water jacket is the cylinder cap
The 3/4 of the coolant rate of water jacket.
The beneficial effects of the present invention are:
In the coolant liquid loop structure of the engine-cooling system of the application, delay is also added in addition to large and small cycles and is followed
Ring, after engine is shut down, switching regulator mechanical water pump and electronic water pump stop working, and electronic control water pump is opened at this time, automatically controlled
Auxiliary pump driving coolant liquid continues flowing and cools down to Electron pressurizing unit, turbocharger, meets turbocharger delay
Cooling demand, then coolant liquid flows through heater and continues to heat to driver's cabin, Electron pressurizing unit and turbocharger series connection
Before warm wind, Electron pressurizing unit and turbocharger will not substantially be worked at the same time, and the coolant temperature that cylinder cover water jacket is gone out is complete
The coolant temperature requirement of full up foot Electron pressurizing unit and turbocharger, while by Electron pressurizing unit and turbocharger
Coolant temperature improves, that is, improves the temperature into the coolant liquid of warm wind；Electron pressurizing unit, turbocharger and heater
The pressure difference at branch both ends increases, and flow improves, and improves warm wind effect.This programme can effectively complete engine-cooling system
Matching work, so that vehicle thermal balance is in a very good state, circuit design is reasonable；From the angle of vehicle heat management
Degree, significantly reduces the oil consumption of engine.And in the large and small circulation under engine behavior, coolant liquid is introduced into cylinder
Lid water jacket shunts after flowing out cylinder cover water jacket, and part flows into cylinder body water jacket and cools down to cylinder body, partially enters warm wind circulation and carries out
Heating, therefore the coolant rate in cylinder cover water jacket is higher than cylinder body water jacket and temperature and is lower than cylinder body water jacket, this both meets cylinder body
Water temperature can be higher, maintains machine oil in lower viscosity, reduces frictional work, so that the requirement of the oil consumption level of engine is reduced,
Meeting cylinder cap water temperature again can be lower, intake efficiency is improved, to improve the requirement of the dynamic property of engine.Moreover, by low
Warm circulating cooling system is designed as having individual low-temperature radiator and low-temperature expansion water tank, effectively prevents following problem:
When sharing expansion tank with high temperature circulation cooling system, the high temperature coolant in expansion tank passes through the compensation water before electronic water pump
Pipeline enters intercooler, and electronic water pump instability of flow influences the inflow temperature of intercooler and the stability of inflow temperature, simultaneously
Influence the intake air temperature of engine and the stability of intake air temperature.
Further, in low-temperature circulating cooling system, individual low-temperature radiator carries out intercooler and BSG cold
But, in low-temperature circulating cooling system, only intercooler and BSG are connected, and the two coolant liquid leaving water temperature is not high, follows low temperature
Ring coolant temperature is held in 50 DEG C hereinafter, Engine Inlet Temperature and intake efficiency has been effectively ensured, and is conducive to play hair
Motivation dynamic property, prevents pinking.
Further, electronic thermostat and switching regulator mechanical water pump are used cooperatively, and can be realized rapid warming-up.
Engine water temperature sensor location arrangements are in cylinder cover water jacket thermal self-restraint stress, because cylinder cover water jacket design is burnt
The influence of room, air flue space, the influence of casting technique, cylinder cover water jacket structure cannot be guaranteed the equilibrium of coolant rate in whose set,
Again because the combustion characteristics of internal combustion engine will form a thermal self-restraint stress (because coolant liquid circulates here in cylinder cover water jacket end
Property it is bad, temperature be easy aggregation, 5 DEG C higher than engine water outlet water temperature of water temperature or so herein).Currently designed water temperature sensor position
Set arrangement here, the received water temperature data of ECU has more reference significance, in addition increases by a branch from cylinder cover water jacket end region temperature
Highest point outflow, flows through throttle valve and is directly entered electronic thermostat valve seat electronic thermostat wax package location, enter back into switching regulator machine
Tool water pump increases the coolant rate of cylinder cover water jacket end region temperature highest point first, prevents temperature from assembling；In addition jacket water temperature
Always, coolant liquid flows directly into the wax packet of electronic thermostat to the water temperature that the coolant temperature of highest point is read with ECU herein, can be with
The more opening and closing of exact effect electronic thermostat main valve and auxiliary-valve；It is provided with throttle valve in this branch, prevents branch stream here
It measures excessively high, influences radiator heat-dissipation amount.
Detailed description of the invention
Fig. 1 is the engine-cooling system frame diagram of the embodiment of the present invention.
Description of symbols:
1 high-temperature expansion water tank, 2 low-temperature radiators, 3BSG, 4 intercoolers, 5 electronic water pumps, 6 throttle valves, 7 low-temperature expansion water
Case, 8 high temperature heat sinks, 9 electronic thermostats, 10 switching regulator mechanical water pumps, 11 oil cooler, 12 cylinder body water jackets, 13 throttle valves,
14 electronic control water pumps, 15 Electron pressurizing units, 16 turbocharger, 17 warm winds, 18 check valves, 19 throttle valves, 20 water outlets, 21
Cylinder cap air inlet side, 22 head exhaust sides, 23 water temperature sensors, 24 wax packets.
Specific embodiment
Carry out the technical solution that the present invention will be described in detail by the following examples, embodiment below is merely exemplary, only
It can be used to explanation and illustration technical solution of the present invention, and be not to be construed as the limitation to technical solution of the present invention.
Critical component definition
BSG:(Belt Starter Generator) a kind of belt start generator system: engine can be achieved and rise/stop
Function realizes energy regenerating, the functions such as auxiliary torque increase.
Electronic water pump: a kind of motor-driven water pump is used as power device using piezoelectric material, may be implemented from control to drive
Dynamic electronization realizes adjustability, the accuracy of liquid transporting using electronic integration system control liquid transmission.
High temperature heat sink: radiator is a part of automobile cooling system, mainly by intake chamber, water-supplying chamber, main leaf and dissipate
The parts assemblies such as hot device fuse, main function are the high-temperature water in cooling engine water jacket, belong to High-temperature cooling circulation.
Low-temperature radiator: low-temperature radiator is a part of automobile cooling system, mainly by intake chamber, water-supplying chamber, main leaf
And the parts such as radiator centre assembly, main function are cooling engine intercooler, the water in BSG, belong to sub-cooled circulation.
Expansion tank: a kind of component of automobile cooling system, main function are for storing coolant liquid, and this patent use is closed
Formula expansion tank, the coolant liquid in water tank also assist in vehicle coolant liquid circulation, in addition, expansion tank also act as to radiator and
The scavenging action of 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 pressurization enter cylinder, main function be increase engine revolving speed.
Intercooler: the auxiliary equipment of engine turbine pressurization is engine its role is to improve the scavenging efficiency of engine
The important set compound component of pressure charging system.
Electronic thermostat: a kind of novel engine temperature control device, coolant temperature is adjusted in the system, coolant liquid is followed
The work of ring cooling fan is determined by engine load and is controlled by control unit of engine, cold relative to traditional engine
But device has better fuel economy and lower hydrocarbon emission.
Oil cooler: a kind of thermantidote of engine, main function are for cooling down engine crankcase, clutch
The engines heat generating components such as device, valve assembly.
In following description, as shown in Figure 1, it is represented with solid line with the arrow big in high temperature circulation cooling system
Coolant flow direction in circulating cooling liquid flow path and low-temperature circulating cooling system, represents high temperature with dash line with the arrow and follows
Partial circulating coolant flow direction in ring cooling system represents the coolant flow in delay circulation with tubular wire with the arrow
Direction represents the water pipe coolant liquid in low-temperature circulating cooling system and high temperature circulation cooling system with chain-dotted line with the arrow
Flow direction represents the gas exhaust piping gas in low-temperature circulating cooling system and high temperature circulation cooling system with dotted line with the arrow
Flow direction.
With reference to Fig. 1, the coolant liquid loop structure of the engine-cooling system of one embodiment of the invention includes height
Warm circulating cooling system and low-temperature circulating cooling system.Low-temperature circulating cooling system, include low-temperature expansion water tank 7, low temperature dissipate
Hot device 2, electronic water pump 5, intercooler 4 and BSG3；High temperature circulation cooling system includes high-temperature expansion water tank 1, high temperature heat sink
8, cylinder body water jacket 12, cylinder cover water jacket 13, switching regulator mechanical water pump 10, electronic thermostat 9, oil cooler 11, electronic control water
Pump 14, Electron pressurizing unit 15, turbocharger 16, warm wind 17, water temperature sensor 23 and wax packet 24.The high temperature circulation of the present embodiment
Cooling system and low-temperature circulating cooling system are cold as exhaust and water replanishing device, high temperature circulation using two individual expansion tanks
But system is run alone with low-temperature circulating cooling system, and each circulation has independent water pump and radiator, and the two is not intervened mutually, kept away
Exempt from the inflow temperature that the high temperature coolant in high temperature circulation cooling system enters low-temperature circulating cooling system influence intercooler, from
And knock problem is solved to a certain extent.And increase the components such as BSG3 and Electron pressurizing unit 15, turbocharger 16 with
Afterwards, the design of the series-parallel of pipeline, trend, tandem, cooling logic just becomes extremely important, and complicated.This programme
Cooling logical design can effectively complete the components such as BSG3 and intercooler 4, Electron pressurizing unit 15, turbocharger 16 and hair
The different cooling requirements of motivation gray iron.
Low-temperature circulating cooling system is for cooling down BSG3 and intercooler 4.In low-temperature circulating cooling system, low temperature
Coolant liquid in radiator 2 is pumped into intercooler 4 by electronic water pump 5, returns to low-temperature radiator 2 after then flowing through BSG3, thus real
Existing low-temperature circulating.In this way, successively being cooled down using individual low-temperature radiator 2 to intercooler 4 and BSG3,4 He of intercooler
BSG3 series connection, the two coolant liquid leaving water temperature is not high, and the inflow temperature control that can satisfy the intercooler 4 in low-temperature circulating exists
50 DEG C of cooling requirements below；In low-temperature circulating cooling system, the power of coolant liquid is controlled from ECU (electronic control unit)
The electronic water pump 5 of system can satisfy low engine speeds, high load capacity or engine and carry out thermal starting by the front end BSG3 belt
When BSG3 and intercooler 4 radiating requirements；Engine Inlet Temperature and intake efficiency has been effectively ensured, has been conducive to play engine
Dynamic property prevents pinking.In addition, the coolant liquid in low-temperature expansion water tank 7 passes through electronic water pump in low-temperature circulating cooling system
The water pipe in 5 fronts supplements coolant liquid to electronic water pump 5, can prevent hypotony before electronic water pump 5 from generating cavitation erosion.Separately
Outside, low-temperature radiator 2 is connected to through gas exhaust piping with low-temperature expansion water tank 7, and on gas exhaust piping, low-temperature radiator 2 with it is low
Throttle valve 6 is in series between warm expansion tank 7, the coolant liquid for being mixed with bubble in low-temperature radiator 2 is due to low-temperature expansion water
Pressure difference between case 7 and low-temperature radiator 2 and low-temperature expansion water tank 7 is entered by throttle valve 6.
High temperature circulation cooling system has systemic circulation, partial circulating and delay three kinds of coolant liquid flow paths of circulation.Engine water outlet
Mouthful 20 water temperatures are higher than the first predetermined temperature, such as at 105 degrees Celsius, high temperature circulation cooling system is in systemic circulation state；Start
20 water temperature of machine water outlet is lower than the second predetermined temperature, such as at 97 degrees Celsius, high temperature circulation cooling system is in partial circulating state；
20 water temperature of water outlet is between the first predetermined temperature and the second predetermined temperature, such as higher than 97 degrees Celsius and lower than 105 Celsius
When spending, large and small circulation is existed simultaneously；Delay after engine is shut down in the predetermined time, such as in 15 minutes, after engine shutdown
Circulation is started to work.According to different engine model, predetermined temperature and predetermined time can be different.
After engine start, 20 water temperature of engine water outlet is higher than the first predetermined temperature, such as at 105 degrees Celsius, electronics
The main valve of thermostat 9 is opened, and auxiliary-valve is closed, and coolant liquid enters systemic circulation state.In systemic circulation state, electronic control water
Pump 14 does not work, and can be regarded as the pipeline for allowing coolant liquid to pass through at this time, and switching regulator mechanical water pump 10 passes through electronics section temperature
Coolant liquid in high temperature heat sink 8 is pumped into oil cooler 11 and cylinder cover water jacket by the main valve of device 9 respectively.Oil cooler 11
Interior coolant liquid returns to high temperature heat sink 8 through the water outlet 20 of engine and realizes circulation.Coolant liquid in cylinder cover water jacket flows through cylinder
It is divided into two-way after lid air inlet side 21, head exhaust side 22 (the two sequence can exchange), wherein all the way through cylinder body water jacket 12, water outlet
Mouth 20 returns to high temperature heat sink 8 and realizes circulation, in addition flows through electronic control water pump 14, Electron pressurizing unit 15, turbocharging all the way
Switching regulator mechanical water pump 10 is returned to after device 16, warm wind 17 realizes circulation.Electronic control water pump keeps not work before engine misses
Make.In systemic circulation, Electron pressurizing unit 15 and turbocharger 16 will not substantially be worked at the same time, and cylinder cover water jacket 13 flows out cold
But liquid temperature fully meets the coolant temperature requirement of Electron pressurizing unit 15 and turbocharger 16, while also improving into warm
The temperature and flow of the coolant liquid of wind 17, improve warm wind effect.And coolant liquid first passes through cylinder cover water jacket, then branches to cylinder body water
12,17 branch of warm wind are covered, so that the coolant rate in cylinder cover water jacket is higher than cylinder body water jacket 12, and temperature is lower than cylinder body water jacket
12, the relatively-high temperature of cylinder body is able to maintain that machine oil in lower viscosity, reduces frictional work, to reduce the oil consumption water of engine
It is flat, and the relative low temperature of cylinder cap can be improved intake efficiency, to improve the dynamic property of engine.
20 water temperature of engine water outlet is lower than the second predetermined temperature, such as at 97 degrees Celsius, the main valve of electronic thermostat 9
It closes, auxiliary-valve is opened, and high temperature circulation cooling system is in partial circulating state.In partial circulating, the not work of electronic control water pump 14
Make, the coolant liquid of switching regulator mechanical water pump 10 is from the return water of oil cooler 11, the return water of cylinder body water jacket 12 and warm wind 17
Return water.Wherein, cylinder body water jacket 12, the coolant liquid in oil cooler 11 are after the confluence of water outlet 20 through electronic thermostat 9
Auxiliary-valve access switch formula mechanical water pump 10, the coolant liquid in warm wind 17 are directly entered switching regulator mechanical water pump 10, switching regulator machine
Coolant liquid is pumped into the cylinder cap air inlet side 21 of oil cooler 11 and cylinder cover water jacket by tool water pump 10 respectively, then flows to head exhaust
Side 22.Coolant liquid in cylinder cover water jacket is divided into two-way after flowing through head exhaust side 22, flow through all the way after cylinder body water jacket 12 with machine oil
Before the auxiliary-valve that coolant liquid in cooler 11 returns to electronic thermostat 9 together reaches switching regulator mechanical water pump 10, another way stream
Enter warm wind 17 after electronic control water pump 14, Electron pressurizing unit 15, turbocharger 16, the coolant liquid in warm wind 17 returns
Switching regulator mechanical water pump 10.Electronic control pump 14 does not work before engine misses, can be considered as a Duan Guanlu at this time.Equally
Ground, coolant liquid first pass through cylinder cover water jacket, then branch to cylinder body water jacket 12,17 branch of warm wind, so that the coolant liquid in cylinder cover water jacket
Flow is higher than cylinder body water jacket 12, and temperature is lower than cylinder body water jacket 12, and the relatively-high temperature of cylinder body is able to maintain that machine oil lower viscous
Degree reduces frictional work, so that the oil consumption for reducing engine is horizontal, and the relative low temperature of cylinder cap can be improved intake efficiency, thus
Improve the dynamic property of engine.
When the water temperature of water outlet 20 is between the first predetermined temperature and the second predetermined temperature, above-mentioned systemic circulation small is followed
Ring coexists.In systemic circulation and partial circulating, due to the shunting function of the branch where warm wind 17, flowed through in cylinder body water jacket 12 cold
But flow quantity is 3/4 of the coolant rate in cylinder cover water jacket.
Water temperature sensor 23 is set at the head exhaust side water temperature highest point, in the head exhaust side water temperature highest
By connecting at pipeline and the wax packet 24 of the electronic thermostat at point, the switching regulator mechanical water pump 10 is returned.
The water temperature sensor location arrangements of engine are in cylinder cover water jacket thermal self-restraint stress, because cylinder cover water jacket design is fired
The influence of room, air flue space, the influence of casting technique are burnt, cylinder cover water jacket structure cannot be guaranteed the equal of coolant rate in whose set
Weighing apparatus, but because the combustion characteristics of internal combustion engine will form a thermal self-restraint stress (because coolant liquid is here in cylinder cover water jacket end
Circulation is bad, and temperature is easy to assemble, and 5 DEG C higher than engine water outlet water temperature of water temperature or so herein).Currently designed water temperature sensing
Here, the received water temperature data of ECU has more reference significance to device location arrangements, in addition increases by a branch from cylinder cover water jacket end
Thermal self-restraint stress outflow, flows through throttle valve and is directly entered electronic thermostat valve seat electronic thermostat wax package location, enter back into switch
Formula mechanical water pump increases the coolant rate of cylinder cover water jacket end region temperature highest point first, prevents temperature from assembling；In addition water jacket
Always, coolant liquid flows directly into the wax packet of electronic thermostat to the water temperature that the coolant temperature of thermal self-restraint stress is read with ECU herein,
Can more exact effect electronic thermostat main valve and auxiliary-valve opening and closing；It is provided with throttle valve in this branch, it is anti-to prop up here
Road flow is excessively high, influences radiator heat-dissipation amount.
And after tail-off, switching regulator mechanical water pump 10 does not work, after the predetermined time, such as 15min, it is automatically controlled auxiliary
Water pump 14 is helped to start to work by HyBoost system battery or the power supply of other circuits, high temperature circulation cooling system enters delay and follows
Ring working condition.In the delay circulation of one embodiment shown in Fig. 1, electronic thermostat 9 is in running order, electronics section
Warm device 9 is heated by electrically heated rod, and main valve is opened, and auxiliary-valve is closed, and under the driving of electronic control water pump 14, comes from cylinder head water
Cover head exhaust side 22 coolant liquid flow through electronic control water pump 14, Electron pressurizing unit 15, turbocharger 16, warm wind 17 after
Access switch formula mechanical water pump 10, coolant liquid are divided into three tunnels after flowing out switching regulator mechanical water pump 10, and it is cooling that the first via flows through machine oil
Cylinder body water jacket 12, head exhaust side 22 are returned to through water outlet 20 after device 11, the second tunnel is returned directly to the cylinder cap air inlet of cylinder cover water jacket
Side 21, returns head exhaust side 22, and third road flows through after the main valve of electronic thermostat 9, high temperature heat sink 8 through water outlet
20, cylinder body water jacket 12 returns to head exhaust side 22.
The effect of delay circulation is that after engine is shut down, switching regulator mechanical water pump 10 and electronic water pump 5 stop work
Make, electronic control water pump 14 is opened at this time, and the coolant liquid that electronic control water pump 14 drives continues flowing to Electron pressurizing unit 15, turbine
Booster 16 is cooled down, and meets the needs of 16 delay chilling of turbocharger, and then coolant liquid passes through 17 pairs of warm wind driving
Continue to heat in room.Before Electron pressurizing unit 15 and turbocharger 16 are connected on warm wind 17, Electron pressurizing unit 15 and turbocharger
16 will not substantially work at the same time, and the coolant temperature that cylinder cover water jacket 13 is gone out fully meets Electron pressurizing unit 15 and turbocharging
The coolant temperature requirement of device 16, while being improved by the coolant temperature of Electron pressurizing unit 15 and turbocharger 16, that is, it mentions
The temperature of the high coolant liquid for entering warm wind 17, improves capacity usage ratio and warm wind effect；Electron pressurizing unit 15, turbocharging
Device 16 and the pressure difference at 17 branch both ends of warm wind increase, and flow improves, and improve warm wind effect.Regardless of being high temperature circulation cooling system
The low-temperature circulating in systemic circulation, partial circulating and delay circulation or low-temperature circulating cooling system in system, can be effective complete
At the matching work of engine-cooling system, vehicle thermal balance is made to be in a very good state, circuit design is reasonable；From
The angle of vehicle heat management significantly reduces the oil consumption of engine.This programme can also be considered as to engine-cooling system into
The new method of one kind of row control.
It is similar with the water pipe in low-temperature circulating cooling system, there is also water pipe in high temperature circulation cooling system,
High-temperature expansion water tank 1 supplements coolant liquid to switching regulator mechanical water pump 10 through water pipe.
It is similar with the gas exhaust piping in low-temperature circulating cooling system, there is also gas exhaust piping in high temperature circulation cooling system,
High temperature heat sink 8, cylinder cover water jacket head exhaust side 22 be connected to 1 with high-temperature expansion water tank through gas exhaust piping.And in exhaust pipe
On the road, be in series with check valve 18 and throttle valve 19 between high temperature heat sink 8 and high-temperature expansion water tank 1, head exhaust side 22 with it is swollen
Throttle valve 13 is in series between swollen water tank 1.In embodiments herein, low-temperature circulating cooling system and high temperature circulation cooling system
System has been all made of water pipe, gas exhaust piping, and throttle valve or check valve have been equipped in gas exhaust piping, and actually low temperature follows
Ring cooling system or high temperature circulation cooling system can also be independently matched with water pipe, gas exhaust piping, check valve and throttle valve.This
It is that high temperature circulation is cold using the advantage of low-temperature expansion water tank 7 and 1 two, high-temperature expansion water tank individual expansion tanks in application
But the high temperature coolant in system is thoroughly kept apart with the cryogenic liquid in low-temperature circulating cooling system, avoids High-temperature cooling
Liquid enters sub-cooled circulation, and the coolant temperature in low-temperature circulating cooling system is low and steady, to reduce pinking probability.
Description the above is only a preferred embodiment of the present invention, it is noted that due to the finiteness of literal expression,
And objectively there is unlimited specific structure, for those skilled in the art, do not departing from the present invention
Under the premise of principle, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (6)
1. a kind of engine-cooling system, it is characterised in that: include high temperature circulation cooling system and low-temperature circulating cooling system；
The high temperature circulation cooling system includes high-temperature expansion water tank, high temperature heat sink, cylinder body water jacket, cylinder cover water jacket, switch
Formula mechanical water pump, electronic thermostat, oil cooler, electronic control water pump, Electron pressurizing unit, turbocharger and warm wind；
The low-temperature circulating cooling system includes low-temperature expansion water tank, low-temperature radiator, electronic water pump, intercooler and BSG；
The high temperature circulation cooling system has systemic circulation, partial circulating and delay three kinds of coolant liquid flow paths of circulation；
In the systemic circulation, the electronic control water air pump inoperative, the switching regulator mechanical water pump passes through the electronics section temperature
Coolant liquid in the high temperature heat sink is pumped into the oil cooler and the cylinder cover water jacket by the main valve of device respectively, described
Coolant liquid in oil cooler returns to the high temperature heat sink, the coolant liquid in the cylinder cover water jacket flow through cylinder cap air inlet side,
Head exhaust is divided into two-way behind side, wherein returning to the high temperature heat sink after flowing through the cylinder body water jacket all the way, in addition flows all the way
It is mechanical that the switching regulator is returned to after the electronic control water pump, the Electron pressurizing unit, the turbocharger, the warm wind
Water pump；
Water temperature sensor is set at the head exhaust side water temperature highest point, is led at the head exhaust side water temperature highest point
It crosses at pipeline and the wax packet of the electronic thermostat and connect, return the switching regulator mechanical water pump；
In the partial circulating, the electronic control water air pump inoperative, the cooling in the cylinder body water jacket, the oil cooler
Liquid enters the switching regulator mechanical water pump through the auxiliary-valve of the electronic thermostat, opens described in the coolant liquid entrance in the warm wind
Coolant liquid is pumped into the oil cooler and the cylinder cover water jacket by pass formula mechanical water pump, the switching regulator mechanical water pump respectively,
Coolant liquid in the cylinder cover water jacket is divided into two-way after flowing through cylinder cap air inlet side, head exhaust side, flows through the cylinder body water all the way
The electronic thermostat is returned to after set together with the coolant liquid in the oil cooler, another way flows through the electronic control water
Enter the warm wind after pump, the Electron pressurizing unit, the turbocharger；
In delay circulation, the switching regulator mechanical water air pump inoperative comes under the driving of the electronic control water pump
The electronic control water pump, Electron pressurizing unit, the turbocharger, described is flowed through in the coolant liquid of the cylinder cover water jacket
Enter the switching regulator mechanical water pump after warm wind, then coolant liquid is divided into three tunnels, and the first via flows through the oil cooler, described
The cylinder cover water jacket is returned to after cylinder body water jacket, the second tunnel is returned directly to the cylinder cover water jacket, and third road flows through the electronics section temperature
The cylinder cover water jacket is returned to after device, the cylinder body water jacket；
The high temperature circulation cooling system and the low-temperature circulating cooling system are respectively provided with water pipe, the low-temperature expansion water
Case supplements coolant liquid to the electronic water pump through the water pipe, and the high-temperature expansion water tank is through the water pipe to described
Switching regulator mechanical water pump supplements coolant liquid.
2. engine-cooling system according to claim 1, it is characterised in that: in the delay circulation, when the electronics
When thermostat is in running order, third road coolant liquid flows through the main valve of the electronic thermostat, the high temperature heat sink, institute
The cylinder cover water jacket is returned to after stating cylinder body water jacket.
3. engine-cooling system according to claim 1 or 2, it is characterised in that: in the low-temperature circulating cooling system
In, the coolant liquid in the low-temperature radiator is pumped into the intercooler by the electronic water pump, returns to after then flowing through the BSG
The low-temperature radiator.
4. engine-cooling system according to claim 1 or 2, it is characterised in that: the high temperature circulation cooling system and
The low-temperature circulating cooling system is respectively provided with gas exhaust piping, and the low-temperature radiator is swollen through the gas exhaust piping and the low temperature
Swollen water tank connection, the high temperature heat sink and the cylinder cover water jacket are connected to through the gas exhaust piping with the high-temperature expansion water tank.
5. engine-cooling system according to claim 4, it is characterised in that: on the gas exhaust piping, the low temperature
Throttle valve, and/or the high temperature heat sink and the high-temperature expansion water are in series between radiator and the low-temperature expansion water tank
It is in series with check valve and throttle valve between case, and/or is in series with throttling between the cylinder cover water jacket and the high-temperature expansion water tank
Valve.
6. engine-cooling system according to claim 1, it is characterised in that: in the systemic circulation and the partial circulating
In, the coolant rate of the cylinder body water jacket is the 3/4 of the coolant rate of the cylinder cover water jacket.
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| CN201710198069.3A CN106948915B (en) | 2017-03-29 | 2017-03-29 | A kind of engine-cooling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107762613B (en) * | 2017-11-17 | 2023-09-01 | 安庆中船柴油机有限公司 | Marine gas engine |
| CN107762619B (en) * | 2017-11-17 | 2023-09-01 | 安庆中船柴油机有限公司 | Marine dual-fuel engine |
| CN110145391B (en) * | 2019-04-02 | 2020-06-30 | 中国北方发动机研究所(天津) | Hybrid power multi-cycle cooling system |
| CN110242396B (en) * | 2019-06-26 | 2020-07-21 | 浙江吉利控股集团有限公司 | Engine cooling system for vehicle and vehicle |
| CN117002250A (en) * | 2022-04-28 | 2023-11-07 | 比亚迪股份有限公司 | Thermal management system and vehicle with same |
| CN115059535B (en) * | 2022-06-27 | 2023-07-04 | 东风汽车集团股份有限公司 | Hybrid power system |
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| WO2014045771A1 (en) * | 2012-09-20 | 2014-03-27 | 日産自動車株式会社 | Cooling device for vehicle |
| US9140176B2 (en) * | 2013-01-29 | 2015-09-22 | Ford Global Technologies, Llc | Coolant circuit with head and block coolant jackets connected in series |
| CN105179064B (en) * | 2015-10-16 | 2018-02-13 | 安徽江淮汽车集团股份有限公司 | A kind of engine-cooling system improved structure for including double expansion tanks |
| CN105351067B (en) * | 2015-10-16 | 2017-09-05 | 安徽江淮汽车集团股份有限公司 | A kind of double expansion tank cooling systems of engine |
| CN205383000U (en) * | 2016-02-02 | 2016-07-13 | 南昌洲际汽车工程技术有限公司 | Engine cylinder lid of integrated temperature saver |
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