CN104769248A - Cooling management for an engine system equipped with a partial exhaust gas recirculation device - Google Patents
Cooling management for an engine system equipped with a partial exhaust gas recirculation device Download PDFInfo
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- CN104769248A CN104769248A CN201380056061.3A CN201380056061A CN104769248A CN 104769248 A CN104769248 A CN 104769248A CN 201380056061 A CN201380056061 A CN 201380056061A CN 104769248 A CN104769248 A CN 104769248A
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- heat transfer
- transfer fluid
- loop
- value
- cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 63
- 239000013529 heat transfer fluid Substances 0.000 claims abstract description 80
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000004064 recycling Methods 0.000 claims description 33
- 239000012530 fluid Substances 0.000 claims description 30
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000002829 reductive effect Effects 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000000670 limiting effect Effects 0.000 description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 238000007726 management method Methods 0.000 description 11
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000497 Amalgam Inorganic materials 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000000659 freezing mixture Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
-
- 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
- F01P2060/08—Cabin heater
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
A method for managing the cooling of an engine system equipped with a partial exhaust gas recirculation device using a cooling circuit comprising a hybrid circuit with a first and second loop for the circulation of heat transfer fluid for cooling a unit heater and an engine respectively, and a third loop for circulating heat-transfer fluid for cooling the partial exhaust gas recirculation device, the method involving: receiving (201) at least one value of a parameter relating to the engine system (TM, state_EGR, pedal_pos, engine_speed), formulating (202, 203, 204) a control signal for the third loop (S) dependent on said at least one value received, so as to reduce the cooling of the partial exhaust gas recirculation device, and sending (205) the control signal to the third loop so as to adapt the cooling to the engine system situation.
Description
Technical field
The present invention relates to the cooling management of the engine system for being equipped with portion discharge recycling device, especially diesel engine system.
Therefore the present invention can be applied to automobile industry.
Background technique
Engine system is generally cooled by cooling circuit.
Therefore the primary power that explosive motor makes fuel supply can be converted to the motion of bent axle.A part for this energy is converted to the heat energy be distributed in exhaust and the heat energy lost at the wall place of firing chamber.Combustion process can produce the room temperature of 800 DEG C of magnitudes, and the cylinder head of these firing chambers (when being produced by aluminum alloy) is generally designed to the maximum temperature only bearing 250 DEG C.In order to by the acceptable value of temperature limiting for the good thermomechanical property for acquisition motor, be necessary enough calories to be rejected in environment.
Therefore, this cooling circuit allows to avoid the overheated of this motor.In addition, the optimal heat level of one or more miscellaneous parts of Power Train can be guaranteed in this loop in very fast mode, such as to contribute to the heating performance of passenger compartment.
Also there is known and a part for the exhaust from motor reclaimed and is introduced into engine intake.Therefore, EGR device (" exhaust gas recirculatioon ") or EGR circuit permit the fresh air being mixed with exhaust to inject passenger compartment.This exhaust gas recovery can permit nitrogen oxide (NO
x) discharge reduce.
Also there is known these portion discharge recycling devices of cooling such as EGR device, to improve the efficiency of these devices.In fact, the discharge of nitrogen oxide increases along with temperature.
Be intended that the second cooling circuit proposing to determine size for exhaust gas re-circulation apparatus.Therefore so cold cyclic system relates to the cooling circuit of two independent interconnection.
Intention obtains a kind of cooler for recycled exhaust gas in addition, also referred to as EGR heat exchanger, this cooler is designed to being intended to engine intake place that the exhaust be reintroduced back in the cooling circuit of motor itself cools.
Specifically, the cooling circuit being called as hot loop can comprise an EGR heat exchanger and an engine cooling apparatus, and this engine cooling apparatus is designed to cooled engine on the identical loop circulated for heat transfer fluid.In hot loop loop, the temperature of EGR device is therefore close to the temperature of motor.A thermostat apparatus allows the temperature of the heat transfer fluid at engine export place to be maintained at predetermined value, such as 90 DEG C.
But, this heat transfer fluid being relatively high from the such temperature value in the magnitude of 70 DEG C to 95 DEG C to EGR, consequently need a kind of system allowing nitrogen oxide emission to reduce.
Be intended that and the cooling circuit being used for EGR is temporarily connected with the cooling circuit being used for motor is de-.Therefore, the cooling circuit being called as mixing loop loop can comprise: a motor and a radiator, and they are in fluid and are communicated with, and its mode is form a loop for for heat transfer fluid circulation; And an EGR heat exchanger, this heat exchanger is arranged to be in fluid with this radiator and is communicated with, and its mode is form a supplementary loop for for the circulation of this heat transfer fluid.Thermostat can permit this loop is closed for this motor valve, and its mode is for making when temperature is lower than threshold value (such as 90 DEG C), and motor is not cooled by this heat transfer fluid.On the other hand, even if therefore this loop for this motor closes, a pump between EGR heat exchanger and this radiator can ensure the circulation of heat transfer fluid only in this supplementary loop, and its mode is this EGR heat exchanger of cooling.
Need more suitable cooling.
Summary of the invention
Propose a kind of method carrying out cooling management by means of cooling circuit to the engine system being equipped with portion discharge recycling device, this cooling circuit comprises:
-heat sink arrangement of the temperature of heat transfer fluid can be reduced,
-be positioned at an air heater apparatus of passenger compartment inside,
-one motor, this motor is in fluid with this air heater apparatus and is communicated with, and its mode is form first loop for heat transfer fluid circulation,
-one first fluid circulation means, such as the first pump, this first fluid circulation means is arranged to for causing from this radiator heat transfer fluid out to circulate in this motor, and its mode is form second loop for heat transfer fluid circulation
-for a cooler (or heat exchanger) of this portion discharge recycling device, be intended to cool described portion discharge recycling device and be in fluid with this radiator be communicated with, its mode is form a Three links theory for heat transfer fluid circulation
-one second fluid circulation means, such as the second pump, to be intended to cause from this radiator heat transfer fluid out to circulate in the cooler of this portion discharge recycling device,
Separate coupling arrangement for-one, this solution coupling arrangement is arranged to close this second loop in one way to make heat transfer fluid only carry out circulating in this first loop and this Three links theory and to be arranged in a second embodiment open this second loop in one way to obtain the circulation of heat transfer fluid simultaneously in these three loops in a first embodiment.
The method relates to:
-receive at least one parameter value relevant to this engine system,
-producing a control signal for this Three links theory according at least one reception value, its mode is reduce the cooling to this portion discharge recycling device, and
-send this control signal to this Three links theory.
Therefore, by controlling the cooling of this portion discharge recycling device, more effectively can control the temperature of temperature in this device and/or this motor, or in fact control other cooling requirement sources temperature, such as manage the temperature that hot gas flows into an air heater in this passenger compartment.By guaranteeing the temperature controlling each cooling requirement source by this way better, can Optimizing Combustion process and therefore can reduce the discharge of nitrogen oxide further.
Advantageously and in a non limiting manner, this portion discharge recycling device can be EGR device.So the cooler of this portion discharge recycling device is called as cooler for recycled exhaust gas.
Therefore this control of the Three links theory in mixing loop loop can be carried out independent of the connection (separate and connect) between these loops.
Advantageously and in a non-limiting manner, coupling arrangement can comprise a thermostat, this thermostat is arranged to according to temperature value that is measured or that estimate, such as opens and closes this second loop according to the delivery temperature at combustor exit place.
Advantageously and in a non-limiting manner, as long as the temperature value that this thermostat apparatus receives is lower than a threshold value (such as 90 DEG C or other certain values), then the second loop keeps closing, and its mode only circulates for making this heat transfer fluid in first and Three links theory.When this temperature exceedes this threshold value, the second loop is opened, and heat transfer fluid circulates simultaneously in the first loop, the second loop and Three links theory.
Advantageously and in a non-limiting manner, this at least one reception value (control signal for Three links theory is produced by it) can comprise a temperature value, such as from motor exhaust or the measuring tempeature value of heat transfer fluid at engine export place.
Such as, the temperature that can propose to measure when engine export place is lower than the cooling reduced when a threshold value such as 85 DEG C, 105 DEG C or other certain values this portion discharge recycling device.
Specifically, during at this start up period, compared with situation about working with its maximum capacity with this second pump, this portion discharge recycling device can less be cooled.This is designed at this radiator and is specified to through size in the degree for cooling this motor may be favourable.Therefore, this radiator can provide relatively high cooling capacity.By the cooling of restriction to this portion discharge recycling device, the gas temperature in this device can be prevented too low.
In fact, if the discharge of nitrogen oxide increases along with temperature, then when the content of hydrocarbon is relatively high, still there is the risk blocked by amalgam when ambient temperature relatively cold (such as lower than 10 DEG C).The amalgam (being attended by the water condensation on the cold wall of cooler for recycled exhaust gas) of flue dust has the risk in the cross section reducing gas passageway and finally may cause the blocking completely of this cooler.This type of dirt may force customer need repeatedly to be repaired.Also there is the additional risk that can not meet anti pollution standard, such as Europe 6 standard.
Therefore, by limiting the cooling to EGR heat exchanger in start-up course, the temperature of EGR device can maintain enough Gao Erneng and prevent blocking, simultaneously enough low and can ensure the value that discharged nitrous oxides is relatively low.
Advantageously and in a non-limiting manner, this temperature value can be produced control signal according to this comparative result compared with a threshold value.
Advantageously and in a non-limiting manner, if this temperature value is lower than this threshold value, then this control signal can produce in one way to optimize the operation of this portion discharge recycling device.
Advantageously and in a non-limiting manner, this control signal can produce in one way to prevent this freezing mixture from seething with excitement.In fact, if this heat transfer fluid stream obtains fast not, then there is the risk of evaporation.
Advantageously and in a non-limiting manner, if this temperature value is greater than this threshold value, then this control signal can produce in one way to limit any rising of this engine temperature.
Advantageously and in a non-limiting manner, this control signal can produce in one way to limit the circulation of heat transfer fluid in EGR heat exchanger in the event detecting engine overheat risk.Phrase " engine overheat " this be used for representing heat transfer fluid from motor out time temperature exceeded a threshold value, the threshold value (such as 90 DEG C) that such as this motor is controlled in or an activation threshold value (such as 110 DEG C) or other certain values.
In fact, when motor is under relatively high load, this cooling circuit can be proved to be to be not enough to temperature to be maintained about desired threshold value, such as 90 DEG C.By the circulation of restriction heat transfer fluid in Three links theory, the amount of the heat transfer fluid entrained by Three links theory can be limited, therefore permit heat transfer fluid circulation in the second loop (radiator) more, this radiator is therefore, it is possible to participate in the cooling of motor.
When the temperature of the heat transfer fluid in the temperature of motor or first, second and/or Three links theory reaches a temperature threshold or according to the operating point of this motor, overheated risk can be detected.The operating point of this motor can such as be determined according to the speed of the load on motor and motor.Generally, the mode of the not examined engine overheat risk of the present invention limited.
Advantageously and in a non-limiting manner, this at least one reception value (control signal for Three links theory is also produced by it) can be a temperature value, the Boolean parameter value of state of this EGR of instruction, a parameter value of instruction engine speed (such as rpm), the parameter value of the position of an instruction accelerator pedal and/or other certain values.
Advantageously and in a non-limiting manner, this control signal can be sent to control described second pump to this second pump.Such as, the flow of this second pump can be controlled.Relatively weak flow will cause the cooling of relative inefficiencies.
Advantageously and in a non-limiting manner, this second pump can be electric pump.
Advantageously and in a non-limiting manner, this control signal can permit the supply voltage controlling this second pump.
Such as, when the open-work phase (ODC) of the second pump changes to 50% from 100%, the flow in radiator can reduce by half.
The present invention never limited by the control of the second pump.
Such as, can propose directly to control this radiator in one way so that the temperature that restriction occurs in radiator inside when the second loop is opened reduces.
According to another example, can at motor, a Twoway valves or three-way valve are provided between radiator and EGR heat exchanger.In engine overheat event, from motor, heat transfer fluid out mainly turns to towards radiator instead of towards EGR heat exchanger, permit thus motor when staying in Three links theory with the fluid of greater part compared be cooled to a greater extent.This Twoway valves or three-way valve can control for the management apparatus implementing method described above by one.
According to another one example, this Twoway valves or three-way valve can be variable flow rate valves.Therefore the cross section of this valve can be controlled in one way to reduce the flow in Three links theory during starting period.
By managing the operation of Three links theory more accurately than (wherein this second pump is static or runs with its 100% ability) in prior art in this way, therefore, it is possible to provide more excellent cooling and thus can discharge by limit pollution.
Further provide a kind of computer program, this computer program comprises the multiple instructions implementing the above-mentioned stage when this program is performed by a processor.
The supporting dielectric that this program can be stored in hard disk type or other certain types can be downloaded or otherwise obtain.
Further provide a kind of device for cooling circuit for carrying out cooling management to the motor being equipped with portion discharge recycling device, this cooling circuit comprises:
-heat sink arrangement of the temperature of heat transfer fluid can be reduced,
-be positioned at an air heater apparatus of passenger compartment inside,
-one motor, this motor is in fluid with this air heater apparatus and is communicated with, and its mode is form first loop for heat transfer fluid circulation,
-one first fluid circulation means, such as the first pump, this first fluid circulation means is arranged to for causing from this radiator heat transfer fluid out to circulate in this motor, and its mode is form second loop for heat transfer fluid circulation
-for a cooler (or heat exchanger) of this portion discharge recycling device, this cooler is in fluid with this radiator and is communicated with, and its mode is form a Three links theory for heat transfer fluid circulation.
A second fluid circulation means, such as the second pump, to be intended to cause from this radiator heat transfer fluid out to circulate in the cooler of this portion discharge recycling device,
Separate coupling arrangement for-one, the while that this solution coupling arrangement being arranged to close in one way this second loop in a first embodiment to make heat transfer fluid only carry out circulating in this first loop and this Three links theory and to be arranged to open in one way this second loop in a second embodiment to obtain heat transfer fluid this second and Three links theory in circulation.
This management apparatus comprises:
-receiving device, for receiving at least one parameter value relevant to this engine system, a value of the state of activation of such as temperature, engine speed, this EGR device, or other certain values.
-processor, for producing a control signal for this Three links theory according to this at least one reception value, its mode is reduce the cooling to this portion discharge recycling device, and
-carrying device, for transmitting the control signal produced to this Three links theory.
This cooling circuit can be a mixing loop loop.
This device being used for managing cooling can comprise the one or more digital processing units for the treatment of this signal, and such as microprocessor, microcontroller and/or other certain processors, maybe can be integrated in wherein.
This receiving device can comprise such as input pin, an input port or other certain devices
This processor can comprise a processor core or CPU (" central processing unit "), a processor or other certain devices.
This carrying device can comprise such as output pin, an output port or other certain devices.
Further provide a kind of engine system, this engine system comprises a portion discharge recycling device, management apparatus described above and this cooling circuit.Such as this vehicle motor can be or can not be diesel engine.
Further provide a kind of automobile comprising engine system described above.
Phrase " open a loop " this be used for representing guarantee in one way fluid be communicated with to make such as by opening the valve be arranged on this loop, fluid can along equidirectional flowing through this loop.
Phrase " is closed a loop " at this and is used for representing a part of closing this loop in one way such as to carry out anti-fluid circulate in this loop by closing the valve be arranged on this loop.
Accompanying drawing explanation
More easily will understand the present invention by referring to accompanying drawing, in these accompanying drawings, illustrate multiple non-limiting example.
Fig. 1 schematically depict the example of cooling system according to an embodiment of the invention.
Fig. 2 is a chart, shows when controlling or not controlling the second pump along with time variations, heat transfer fluid from motor out time and this heat transfer fluid from EGR heat exchanger out time temperature value.
Fig. 3 is the flow chart of an example of method according to an embodiment of the invention.
Embodiment
With reference to Fig. 1, cooling circuit 1 comprises air heater 14 (all not illustrating at this) and the motor 10 that is arranged in the passenger compartment of automobile, both is linked together by pipeline, and its mode is formation first heat transfer fluid circulation loop 21.
Loop 1 comprises the radiator 11 be arranged on the second heat transfer fluid circulation loop 22 further.First pump 12 can cause heat transfer fluid in this second loop cocycle, and its mode is reduce the temperature of motor.The thermostat 13 being positioned in the outlet port of motor 10 is permitted the temperature of this second loop 22 measured by motor 10 outlet port and is opened and closed.
Other expendable parts (such as air heater 14) can be arranged on the first loop 21, and its mode is can benefit from the circulation of this heat transfer fluid.
In addition, tank 15 can provide the reservoir of heat transfer fluid.
An EGR heat exchanger 16 can be positioned on Three links theory 23.The pipeline of this Three links theory 23 forms parallel connection relative to the second loop 22.Second pump 17 can circulate by permit fluid between EGR heat exchanger 16 and the radiator 11 of this motor.
With reference to Fig. 2, curve 101 corresponds to the temperature value of the heat transfer fluid in motor 10 outlet port in the cooling system 1 of Fig. 1.Curve 161 corresponds to the temperature value in EGR heat exchanger 16 outlet port in the loop in Fig. 1.Finally, the temperature value of the heat transfer fluid in this EGR heat exchanger 16 outlet port when curve 200 corresponds to when pump 17 is not controlled and maintains its 100% ability.
The temperature value of these curves 101,161 and 200 is tell-tale, and these curves are mainly used in explaining practicability of the present invention.
Motor is unlocked at time point t=0.Then in whole starting period, the constant temperature of motor increases, until reach a threshold value, and such as 90 DEG C.In this example, the temperature of motor increases in a linear fashion.Thermostat 13 in Fig. 1 permits the second heat transfer fluid circulation loop 22 and cuts out, as long as this temperature value of the heat transfer fluid of adjacent engine 10 is lower than 90 DEG C.
During this starting period, radiator 11 is therefore only for cooling this EGR heat exchanger 16.
If the second pump 17 is in its 100% ability, then heat transfer fluid is relatively cool and under EGR heat exchanger 16 can be maintained at relatively low temperature, such as about 45 DEG C.But, generally undesirable be the gas that injected by EGR by have lower than 50 DEG C of temperature heat transfer fluid cool, thus produce blocking risk.
The flow that management apparatus (carry in such as automobile and comprise the in-vehicle processor 18 of this engine system in addition) permits the second electric pump 17 is adapted in one way thus optimizes the operation of these different expendable parts and the discharge of limit pollution nitrogen oxide.
This processor 18 receives the signal that different sensors (not shown at this) sends, such as the temperature transducer of the heat transfer fluid at engine export place, and produce the control signal being used for the second pump 17, make this second pump modulate the flow of heat transfer fluid like this.
By controlling electric pump 17 in one way thus reduce the flow of heat transfer fluid in tertiary circuit 23 during this starting period, EGR heat exchanger can be avoided to maintain at a too low temperature.Therefore, curve 161 can show the vibration being slightly greater than 50 DEG C during starting period.Such temperature value is especially favourable in the sense: they can realize the low emission of nitrogen oxide and make the risk of blocking limited.
When engine temperature reaches 90 DEG C, then the second loop 22 opened by thermostat 13, and namely heat transfer fluid is transported in motor 10 by pump 12.Then the temperature of this cooling fluid is controlled in about 90 DEG C.Loop 21,22 and 23 is fluid communication with each other, and the temperature of EGR heat exchanger reaches 90 DEG C rapidly.Such value (corresponding to relatively high level of pollution, during being included in starting period) is still acceptable, because EGR is inactive when motor is under enough loads generally at this.
When engine system is in starting period, this heat transfer fluid (such as ethylene glycol liquid) circulates along the clockwise direction shown in the sketch of Fig. 1 on this Three links theory.
When thermostat apparatus 13 opens the second loop 22, heat transfer fluid via become radiator 11 export position, reach Three links theory 23 according to the arrow represented with 25 in Fig. 1.In other words, heat transfer fluid and the temperature maintained in Three links theory close to 55 DEG C of temperature mixes mutually close to the heat transfer fluid of 90 DEG C, then from motor 10 out, and the temperature of the fluid of EGR internal heat exchanger is rapidly close to the temperature of motor 10 internal flow.Can notice, so stable after, this heat transfer fluid continues to circulate in EGR heat exchanger along equidirectional (namely in FIG from right to left), but the heat transfer fluid circulation on the other hand in this radiator is reverse.During this starting period, heat transfer fluid in radiator 11 as Fig. 1 in from left to right circulate.On the other hand, in continuous running, this heat transfer fluid again in radiator 11 as from left to right circulated in Fig. 1.
Radiator 11 is correspondingly designed to permit this heat transfer fluid and circulates in the two directions.
A kind of management method can be realized with reference to the processor 18 in Fig. 3, Fig. 1.
In the process in stage 201, receive the value T of the coolant temperature at engine export place
m, parameter value status_EGR, the value pedal_pos of engine loading parameter of instruction EGR actuator status and the value motor _ speed of engine speed parameter.
Status_EGR parameter can correspond to the position of the electric actuator be associated with the management of EGR.
Engine loading parameter can be such as the value of the mean effective pressure (EMP) on accelerator pedal.
Subsequently in the process of test 202 with by refrigerant temperature value T
mcompare with threshold value such as 105 DEG C or 110 DEG C.
If this temperature value is greater than this threshold value, and if the value of status_EGR indicates this EGR heat exchanger not work, then think that vehicle is in the situation that there is overheated risk.Then carry out the stage 203, produce the value of control signal S in the process according to the value of pedal_pos and motor _ parameter of velocity.More accurately, the first X-Y scheme spectrogram (being called engine cooling collection of illustrative plates) can permit the value reading this control signal according to the value of these two parameters.This first collection of illustrative plates is designed to control in one way flow in Three links theory according to the operating point of motor so that with relatively little cooling EGR and use the resource of this radiator to carry out further cooled engine.
If test 202 is negatives, if namely temperature is lower than threshold value, then think that vehicle is in and start or the normal situation run, wherein overheated risk is restricted.
All the time the controlling value of the second electric pump is produced by means of the second two-dimensional map being different from this first collection of illustrative plates according to the value of pedal_pos and motor _ parameter of velocity in the process in stage 204.
This second collection of illustrative plates (being called as reliability collection of illustrative plates) be designed to optimize the operation of EGR mode, especially to prevent the mode blocked by amalgam to control flow.
Then, in the process in stage 205, the value of the control signal produced is transmitted to control electric pump 17.
These different stages 201,202,205,203 or 204 repeat with the interval of rule.One can be provided to export test 206 (being such as intended to the test verifying that motor is still opened) and a stage for introducing latent period 207 between the execution of two loops to loop.
The mode of the present invention's this electric pump never controlled limited.Such as, this pump can be proposed only to be controlled according to temperature.
The present invention is also not limited to and uses mapping graph or even specific collection of illustrative plates to produce this control signal.
The engine cooling collection of illustrative plates used in the process in stage 203 such as can cause when motor is in low load relatively the control ODC of electric pump 17 to reduce 30%, 40% or 50% and reduce 90% in the value of pedal_pos and motor _ parameter of velocity corresponding to causing this control during engine overload.In this case, in order to prevent engine overheat, in fact the flow of Three links theory 23 can be decreased to its maximum value 10% in case to motor 10 transmit more the heat transfer fluid that cools by radiator 11.
The reliability collection of illustrative plates realized in phase 204 can also be designed to the flow reduced when pedal_pos and motor _ parameter of velocity are under the risk corresponding to starting period in Three links theory 23, such as, be reduced to 40% of the peak rate of flow of the second pump.
As variant, the temperature transducer that interpolation one is positioned in cooler for recycled exhaust gas ingress can be proposed.This sensor can provide measured value, and these measured values can allow to distinguish start-up situation better and therefore, it is possible to provide the management being more suitable for these start-up situation, Three links theory is isolated with the second loop in the process.
In addition, processor 18 can receive value that this sensor reads and can be arranged to the flow that makes to increase when these values exceed threshold value in Three links theory 23.In fact, it is intended that and prevents the heat transfer fluid in Three links theory 23 from seething with excitement.
Claims (10)
1. carry out to the engine system being equipped with portion discharge recycling device the method cooling management by means of cooling circuit, this cooling circuit comprises:
A heat sink arrangement of the temperature of heat transfer fluid can be reduced,
Be positioned at an air heater apparatus of passenger compartment inside,
A motor, this motor is in fluid with this air heater apparatus and is communicated with, and its mode is form first loop for heat transfer fluid circulation,
A first fluid circulation means, this first fluid circulation means is arranged to for causing from this radiator heat transfer fluid out to circulate in this motor, and its mode is form second loop for heat transfer fluid circulation,
For a heat exchanger of this portion discharge recycling device, be intended to cool described portion discharge recycling device and be in fluid with this radiator be communicated with, its mode is form a Three links theory for heat transfer fluid circulation,
A second fluid circulation means, to be intended to cause from this radiator heat transfer fluid out to circulate in the heat exchanger of this portion discharge recycling device,
Separate coupling arrangement for one, the while that this solution coupling arrangement being arranged to close in one way this second loop in a first embodiment to make heat transfer fluid only carry out circulating in this first loop and this Three links theory and to be arranged to open in one way this second loop in a second embodiment to obtain heat transfer fluid this second and Three links theory in circulation
The method relates to:
Receive at least one parameter value (T that (201) are relevant to this engine system
m, status_EGR, pedal_pos, motor _ speed),
Produce (202,203,204) control signal (S) for this Three links theory according at least one reception value described, its mode is reduce the cooling to this portion discharge recycling device, and
(205) this control signal is sent to make the situation of this cooling and this engine system suitable to this Three links theory.
2. described in the method for claim 1, wherein relevant to this engine system, at least one parameter value comprises at least one value being selected from the following: temperature value (T
m), the state value (status_EGR) of this portion discharge recycling device, engine speed value (motor _ speed) and engine loading value (pedal_pos).
3. method as claimed in claim 2, comprise a comparison phase (202) of this temperature value and a threshold value (THR1), this control signal (S) produces according to the result of described comparison.
4. method as claimed in claim 3, wherein, if this temperature value (T
m) lower than this threshold value (THR1), then this control signal produces (204) in one way to optimize the operation of this portion discharge recycling device.
5. the method as described in one of claim 3 to 4, wherein, if this temperature value (T
m) being greater than this threshold value (THR1), then this control signal produces (203) in one way to limit any rising of this engine temperature.
6. the method as described in one of claim 1 to 5, wherein, this control signal is sent out (205) to this second device making fluid circulate to control the flow that described second device produces.
7. one kind cools for carrying out the engine system being equipped with portion discharge recycling device the device for cooling circuit (18) managed, and this cooling circuit comprises:
A heat sink arrangement (11) of the temperature of heat transfer fluid can be reduced,
Be positioned at an air heater apparatus (14) of passenger compartment inside,
A motor (10), this motor is cooled and is in fluid with this air heater apparatus and is communicated with, and its mode is form first loop (21) for heat transfer fluid circulation,
A first fluid circulation means (12), this first fluid circulation means is arranged to for causing from this radiator heat transfer fluid out to circulate in this motor, its mode is form second loop (22) for heat transfer fluid circulation
A heat exchanger (16) of this portion discharge recycling device, be intended to cool described portion discharge recycling device and be in fluid with this radiator be communicated with, its mode is form a Three links theory (23) for heat transfer fluid circulation
A second fluid circulation means (17), to be intended to cause from this radiator heat transfer fluid out to circulate in the cooler of this portion discharge recycling device,
Separate coupling arrangement (13) for one, the while that this solution coupling arrangement being arranged to close in one way this second loop in a first embodiment to make heat transfer fluid only carry out circulating in this first loop and this Three links theory and to be arranged to open in one way this second loop in a second embodiment to obtain heat transfer fluid this second and Three links theory in circulation
This management apparatus comprises:
Receiving device, for receiving at least one parameter value relevant to this engine system,
Processor, for producing a control signal for this Three links theory according at least one reception value described, its mode is reduce the cooling to this portion discharge recycling device, and
Carrying device, for transmitting the control signal that produces to make the situation of this cooling and this engine system suitable to this Three links theory.
8. an engine system, comprises a portion discharge recycling device, management apparatus (18) as claimed in claim 7 and this cooling circuit.
9. engine system as claimed in claim 8, wherein, coupling arrangement comprises a thermostat (13), and this thermostat is arranged to for opening and closing this second loop according to measured temperature value.
10. one kind comprises the automobile of the engine system as described in one of claim 8 to 9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1260398A FR2997448B1 (en) | 2012-10-31 | 2012-10-31 | COOLING MANAGEMENT OF A MOTOR SYSTEM EQUIPPED WITH A PARTIAL EXHAUST GAS RECIRCULATION DEVICE |
| FR1260398 | 2012-10-31 | ||
| PCT/EP2013/072221 WO2014067836A1 (en) | 2012-10-31 | 2013-10-24 | Cooling management for an engine system equipped with a partial exhaust gas recirculation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104769248A true CN104769248A (en) | 2015-07-08 |
| CN104769248B CN104769248B (en) | 2019-04-26 |
Family
ID=47878173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380056061.3A Active CN104769248B (en) | 2012-10-31 | 2013-10-24 | For being equipped with the cooling management of the engine system of portion discharge recycling device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2914827B1 (en) |
| CN (1) | CN104769248B (en) |
| FR (1) | FR2997448B1 (en) |
| WO (1) | WO2014067836A1 (en) |
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| CN109372644A (en) * | 2018-10-30 | 2019-02-22 | 潍柴动力股份有限公司 | A kind of engine thermal guard method and device |
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Also Published As
| Publication number | Publication date |
|---|---|
| FR2997448A1 (en) | 2014-05-02 |
| FR2997448B1 (en) | 2018-11-09 |
| EP2914827B1 (en) | 2022-08-24 |
| WO2014067836A1 (en) | 2014-05-08 |
| CN104769248B (en) | 2019-04-26 |
| EP2914827A1 (en) | 2015-09-09 |
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Effective date of registration: 20240311 Address after: Valladolid, Spain Patentee after: New H Power Transmission System Holdings Ltd. Country or region after: Spain Address before: Bologna-Biyangu, France Patentee before: RENAULT S.A.S. Country or region before: France |
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