CN103189611B - Abnormality determination apparatus and abnormality determination method for coolant temperature sensor, and engine cooling system - Google Patents
Abnormality determination apparatus and abnormality determination method for coolant temperature sensor, and engine cooling system Download PDFInfo
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- CN103189611B CN103189611B CN201180053201.2A CN201180053201A CN103189611B CN 103189611 B CN103189611 B CN 103189611B CN 201180053201 A CN201180053201 A CN 201180053201A CN 103189611 B CN103189611 B CN 103189611B
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- 239000002826 coolant Substances 0.000 title claims abstract description 190
- 230000005856 abnormality Effects 0.000 title claims abstract description 40
- 238000001816 cooling Methods 0.000 title claims description 49
- 238000000034 method Methods 0.000 title claims description 37
- 230000002159 abnormal effect Effects 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims description 135
- 239000000110 cooling liquid Substances 0.000 claims description 93
- 239000007788 liquid Substances 0.000 claims description 38
- 238000011084 recovery Methods 0.000 claims description 23
- 230000004087 circulation Effects 0.000 description 17
- 238000001514 detection method Methods 0.000 description 15
- 238000012545 processing Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
-
- 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
-
- 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/32—Engine outcoming fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A coolant temperature sensor abnormality determination apparatus opens a changeover valve (10) to increase the temperature of a coolant in a heater passageway (202) if the amount of increase of the detected heater inlet coolant temperature value thw2 obtained when the intake air amount of an engine (1) becomes equal to or greater than a predetermined value is small. Then, if the amount of increase (thw2 deviation) in the detected heater inlet coolant temperature value thw2 after the changeover valve (10) opens is greater than or equal to the predetermined value, the apparatus determines that the heater inlet coolant temperature sensor (22) is normal. If the amount of increase in the detected heater inlet coolant temperature value thw2 is smaller than the predetermined value, the apparatus determines that the heater inlet coolant temperature sensor (22) is abnormal.
Description
Technical field
The present invention relates to the cooling system of motor (internal-combustion engine), relate more particularly to presence or absence cooling-water temperature transmitter abnormity determining device and the cooling-water temperature transmitter abnormality determination method of the exception of the cooling-water temperature transmitter judging cooling system.
Background technique
For the motor be arranged in vehicle etc., the coolant jacket as cooling passage is arranged in motor (cylinder block or cylinder head), and makes cooling liquid cool whole motor (or warming-up) via coolant jacket circulation by coolant pump.Be associated with this cooling system, there is so a kind of technology: the changing valve being provided with the liquid circulation be limited between engine coolant passage and heater system (Heater Channels), and when engine cold, changing valve cuts out with passing through (performing cooling liquid in motor to stop) of stoping cooling liquid in motor in (at coolant jacket), thus realize the rapid warming-up Japanese patent application (JP-A-2009-150266) of 2009-150266 (such as, be see publication No.) of motor.
Performing the cooling system that in above-mentioned motor, cooling liquid stops is provided with such as: engine coolant temperature sensor, and it detects the outlet coolant temperature of motor; And heater system cooling-water temperature transmitter (such as, calorifier inlets cooling-water temperature transmitter), it detects the coolant temperature in heater system.As the method for detecting abnormality of the exception of detection heater system cooling-water temperature transmitter, there is a kind of so method: find after certain hour section after the engine started the detection coolant temperature detected by heater system cooling-water temperature transmitter not yet raise predetermined value or larger when (such as, Japanese patent application (JP-A-10-073047) see publication No. is 10-073047), judge that heater system cooling-water temperature transmitter is abnormal.Incidentally, the example of the exception of cooling-water temperature transmitter is that card stops (stuck) extremely, and stop extremely at described card, sensor values is fixed in some values.
Incidentally, for performing the cooling system that in above-mentioned motor, cooling liquid stops, when aforementioned method for detecting abnormality is applied to the abnormality juding relevant with heater system cooling-water temperature transmitter, if be arranged in thermal source in heater system (such as, exhaust heat recovery apparatus etc.) break down, even if the temperature of the cooling liquid after then have passed through certain hour section after the engine started in heater system does not also rise.Therefore, the detection coolant temperature value provided due to heater system coolant temperature does not rise, so there is following situation sometimes: although sensor is actually normal, heater system cooling-water temperature transmitter is judged to be exception mistakenly.
Summary of the invention
The invention provides cooling-water temperature transmitter abnormity determining device and cooling-water temperature transmitter abnormality determination method, in the cooling system stoping cooling liquid to be passed through in motor, cooling-water temperature transmitter abnormity determining device and cooling-water temperature transmitter abnormality determination method accurately can judge that whether the cooling-water temperature transmitter of the temperature of the cooling liquid detected in heater system is abnormal, and can not do the judgement made mistake.
According to the cooling-water temperature transmitter abnormity determining device of first scheme of the present invention for being applied to the cooling-water temperature transmitter abnormity determining device of engine-cooling system (performing the cooling system that cooling liquid stops in motor), described engine-cooling system comprises: engine coolant passage, motor is carried out to the bypass passageways (Heater Channels) of bypass, control valve (changing valve), it is limited in the liquid circulation between engine coolant passage and bypass passageways, and bypass cooling-water temperature transmitter (calorifier inlets cooling-water temperature transmitter), it detects the bypass coolant temperature in bypass passageways, and described cooling-water temperature transmitter abnormity determining device judges that whether bypass cooling-water temperature transmitter is abnormal, and described cooling-water temperature transmitter abnormity determining device comprises decision device, if when described bypass coolant temperature be estimated as be equal to, or greater than the first predetermined value time (specifically, such as, when the air inflow integral value of air inflow (after the engine start time point) sucking motor becomes when being equal to, or greater than the first predetermined value) increasing amount of the checkout value of bypass coolant temperature that obtains is less than the second predetermined value, so described decision device opens described control valve, and based on the variable quantity of the checkout value of the described bypass coolant temperature obtained after opening at described control valve, described bypass cooling-water temperature transmitter is judged to be exception.
In addition, according in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, if after described control valve is opened, the increasing amount of the described checkout value of described bypass coolant temperature becomes and is equal to, or greater than described second predetermined value, described bypass cooling-water temperature transmitter can be judged to be normally by so described decision device, if after described control valve is opened, the increasing amount of the described checkout value of described bypass coolant temperature becomes and is equal to, or greater than described second predetermined value, described bypass cooling-water temperature transmitter can be judged to be normally by so described decision device, and, if after described control valve is opened, the increasing amount of the described checkout value of described bypass coolant temperature is less than described second predetermined value, described bypass cooling-water temperature transmitter can be judged to be exception by so described decision device.
In addition, according in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, described bypass passageways (Heater Channels) can be provided with exhaust heat recovery apparatus and EGR(EGR) at least one in cooler.
According in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, first, when be estimated as when bypass coolant temperature be equal to, or greater than the first predetermined value time (becoming when being equal to, or greater than the first predetermined value when sucking the air quantity (after the start of engine the integral value of air inflow) of motor) sense channel coolant temperature value of obtaining increasing amount (detecting the deviation of bypass coolant temperature value and detection bypass coolant temperature value obtained when the engine starts) be greater than or equal to the second predetermined value, bypass cooling-water temperature transmitter is judged to be normally by device.On the other hand, can expect, when the aforementioned increasing amount detecting bypass coolant temperature value is less than described second predetermined value, " exception of bypass coolant temperature " or " fault of the thermal source of bypass passageways ", thus device opens the control valve of the liquid circulation be limited between engine coolant passage and bypass passageways.
Because control valve is opened, so cycle through two systems from two systems (that is, the cooling liquid of engine coolant passage and bypass passageways), and flow into bypass passageways by the high temperature coolant of heating engines.Even if bypass passageways does not have available thermal source (even if such as the thermal source such as exhaust heat recovery apparatus, cooler for recycled exhaust gas breaks down), this also can make the temperature of the cooling liquid in bypass passageways raise, and the detection bypass coolant temperature value detected by cooling-water temperature transmitter in the normal situation of hypothesis bypass cooling-water temperature transmitter is increased.Therefore, in aforementioned schemes of the present invention, utilize these points, the variable quantity detecting bypass coolant temperature value after control valve is opened is greater than or equal to the second predetermined value, device judges that bypass cooling-water temperature transmitter is normal, and when the variable quantity detecting bypass coolant temperature value is less than described second predetermined value, this device judges bypass cooling-water temperature transmitter abnormal (have card and stop exception).
As mentioned above, according to the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, when be estimated as when bypass coolant temperature be equal to, or greater than the first predetermined value time (when suck the air quantity of motor become be equal to, or greater than the first predetermined value time) increasing amount of detection bypass coolant temperature value that obtains be less than the second predetermined value, described device is opened control valve and is flowed into bypass passageways to allow the high temperature coolant from motor, the temperature of the cooling liquid in bypass passageways is raised, and keep the state that this coolant temperature raises simultaneously, variable quantity based on the detection bypass coolant temperature value detected by bypass cooling-water temperature transmitter performs the judgement about bypass cooling-water temperature transmitter.Therefore, even if make bypass passageways not have available thermal source because exhaust heat recovery apparatus, cooler for recycled exhaust gas etc. break down, described device also accurately can judge that whether bypass cooling-water temperature transmitter is abnormal, and can not do the judgement made mistake.
In addition, according in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, the control valve being limited in the liquid circulation between engine coolant passage and bypass passageways can be temperature sensitive operating valve, this temperature sensitive operating valve has the temperature sensitive portion that valve body is shifted, and when the estimated value of the environment cools liquid temp of control valve becomes the Opening valve temperature being equal to, or greater than control valve, cooling-water temperature transmitter abnormity determining device can judge that control valve is opened.The employing of this structure makes it possible to shorten and judges whether control valve has opened the required time.Hereafter will be explained.
First, the cooling system (performing the cooling system that cooling liquid stops in motor) be suitable for according to the cooling-water temperature transmitter abnormity determining device of aforementioned schemes uses the temperature sensitive operating valve such as with the temperature sensitive portion making valve body be shifted as the control valve at cooling liquid outlet place being arranged on motor.In this case, electric heater is embedded in temperature sensitive portion to make to melt heat sensitive wax to the be energized heat that generates of electric heater and force control valve to be opened (that is, opening due to the energising of heater) by utilizing.When the increasing amount of above-mentioned detection bypass coolant temperature value is less than the second predetermined value, is energized by making heater and opens valve.Judge the example of the method whether control valve has been opened as utilization after the energising of electric heater starts elapsed time to judge the method whether valve has been opened.
When the endurance of the energising based on heater determine control valve open, make the mistake that control valve opened judge to prevent from fact not yet opening when valve, valve opening status criteria value is applicable to based on following condition: before control valve is opened, need the time grown most.But about this suitability, nargin is very big, make to there is the long time inevitably before performing the normal or abnormal judgement about bypass cooling-water temperature transmitter.But judge during by adopting the estimated value when the environment cools liquid temp of control valve to become and being equal to, or greater than Opening valve temperature the method that control valve has been opened to judge that control valve is opened according to the open mode of the reality of valve.Owing to which eliminating the needs providing above-mentioned nargin, only need the short time determining before valve has been opened, thus the time before the normal or abnormal judgement about bypass cooling-water temperature transmitter can be shortened.
Should note herein, according in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, if perform the judgement about bypass cooling-water temperature transmitter during the state that the high temperature coolant in engine coolant passage and the cooling liquid in bypass passageways fully do not mix after control valve is opened (state that the temperature of the cooling liquid in bypass passageways not yet fully raises), then there is the possibility of the mistake judgement making sensor abnormality when sensor is in fact normal.Therefore, according in the cooling-water temperature transmitter abnormity determining device of aforementioned schemes, in order to prevent the abnormality juding of mistake, can after control valve is opened after a predetermined time after, namely, coolant temperature in bypass passageways fully raises the required time through afterwards, can perform the judgement about bypass cooling-water temperature transmitter.
According to the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, if the increasing amount of the detection bypass coolant temperature value obtained when bypass coolant temperature is estimated as and is equal to, or greater than the first predetermined value is relatively little, then control valve is opened the coolant temperature in bypass passageways is raised, and then performs the judgement of the exception about cooling-water temperature transmitter based on the variable quantity of the detection bypass coolant temperature value after opening at control valve.Therefore, it is possible to accurately judge the existence of the exception of bypass cooling-water temperature transmitter, and the judgement that can not make mistake.
Cooling-water temperature transmitter abnormality determination method according to alternative plan of the present invention is the cooling-water temperature transmitter abnormality determination method used in engine-cooling system, and described engine-cooling system comprises: engine coolant passage; Motor is carried out to the bypass passageways of bypass; Control valve, it is limited in the liquid circulation between engine coolant passage and bypass passageways; And bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in bypass passageways, and described cooling-water temperature transmitter abnormality determination method judges that whether described bypass cooling-water temperature transmitter is abnormal, and described method comprises: when described bypass coolant temperature be estimated as be equal to, or greater than the first predetermined value time, use described bypass cooling-water temperature transmitter to detect described bypass coolant temperature; If the increasing amount of the described bypass coolant temperature detected is greater than or equal to the second predetermined value, so described bypass cooling-water temperature transmitter is judged to be normally; And if the described increasing amount of the described bypass coolant temperature detected is less than described second predetermined value, then open described control valve, and after described control valve is opened, use described bypass cooling-water temperature transmitter again to detect described bypass coolant temperature, and before and after opening based on described control valve between the variable quantity of described bypass coolant temperature judge that whether described bypass cooling-water temperature transmitter abnormal.
Engine-cooling system according to third program of the present invention comprises: engine coolant passage; To the bypass passageways of motor bypass; Control valve, it is limited in the liquid circulation between engine coolant passage and bypass passageways; Bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in bypass passageways; And cooling-water temperature transmitter abnormality determination unit, if the increasing amount of the checkout value of the bypass coolant temperature obtained when bypass coolant temperature is estimated as and is equal to, or greater than the first predetermined value is less than the second predetermined value, then described cooling-water temperature transmitter abnormality determination unit opens described control valve, and judges that whether bypass cooling-water temperature transmitter is abnormal based on the variable quantity of the checkout value of the bypass coolant temperature obtained after opening at control valve.
According to according to the cooling-water temperature transmitter abnormality determination method of alternative plan and the engine-cooling system according to third program, the effect substantially identical with the effect realized according to the cooling-water temperature transmitter abnormity determining device described in first scheme can be realized.
Accompanying drawing explanation
Be described the feature of exemplary embodiment of the present invention, advantage and technology and industrial significance below with reference to accompanying drawings, wherein similar reference character represents similar element, and wherein:
Fig. 1 is the total structure figure of the example of the cooling system of the motor that application embodiments of the invention are shown;
Fig. 2 A is for illustrating the structure of the changing valve used in the cooling system shown in Fig. 1 and the sectional drawing of valve closing state of changing valve being shown;
Fig. 2 B is for illustrating the structure of the changing valve used in the cooling system shown in Fig. 1 and the sectional drawing of valve opening state of changing valve being shown;
Fig. 3 A is for illustrating the figure of the stream of the cooling liquid circulated in cooling passage during engine cold state in the cooling system of the motor shown in Fig. 1;
Fig. 3 B is for illustrating in the cooling system of the motor shown in Fig. 1 the figure of the stream of the cold cooling liquid circulated in but liquid passage during half warm-up mode of motor;
Fig. 4 is for illustrating the figure of the stream of the cooling liquid circulated in cooling passage during the complete warm-up mode of motor in the cooling system of the motor shown in Fig. 1;
Fig. 5 is the flow chart of the example of the cooling-water temperature transmitter abnormality juding process that ECU execution is in an embodiment of the present invention shown; And
Fig. 6 is the sequential chart of the example that cooling-water temperature transmitter abnormality juding process is in an embodiment of the present invention shown.
Embodiment
Hereinafter, with reference to the accompanying drawings embodiments of the invention are described.
With reference to Fig. 1, the cooling system (in motor, cooling liquid stops cooling system) of motor 1 is described.
Cooling system of the present invention comprises electric coolant pump 2, radiator 3, thermostat 4, heater 5, exhaust heat recovery apparatus 6, EGR(EGR) cooler 7, changing valve 10, for making liquid circulation cooling passage 200 arriving these devices etc.
Cooling passage 200 comprises: engine coolant passage 201, and it makes cooling liquid (such as, LLC(Long Life Coolant, long-acting liquid coolant)) circulate via motor 1, radiator 3 and thermostat 4; And Heater Channels 202, it makes cooling liquid circulate via cooler for recycled exhaust gas 7, exhaust heat recovery apparatus 6, heater 5 and thermostat 4.In this embodiment, for cooling liquid by the circulation of engine coolant passage 201 and cooling liquid by both circulations of Heater Channels 202, adopt a kind of electric coolant pump (electric water pump) 2.
Motor 1 is petrol engine, diesel engine etc., and it is arranged in conventional vehicle, motor vehicle driven by mixed power etc., and the cylinder block and head of motor is provided with coolant jacket (not shown).Motor 1 is provided with the engine coolant temperature sensor 21 of the coolant temperature detecting cooling liquid outlet (the coolant jacket outlet of cylinder head) 1b place.In addition, in the gas-entered passageway of motor 1, the intake air temperature sensor 23 detecting intake temperature and the Air flow meter 24 detecting the air quantity sucking motor 1 is furnished with.The output signal of engine coolant temperature sensor 21, intake air temperature sensor 23 and Air flow meter 24 is input to ECU(electronic control unit) 300.
Electric coolant pump 2 is the coolant pump that its discharge flow rate (head pressure) can be set changeably by the rotating speed controlling motor.Electric coolant pump 2 is arranged such that the entrance of its exhaust port and the cooling liquid entrance 1a(coolant jacket of motor 1) be communicated with.The operation of electric coolant pump 2 is controlled by ECU300.In addition, the startup together with motor 1 drives electric coolant pump 2, and controls the discharge flow rate of electric coolant pump 2 according to the running state etc. of motor 1.
Thermostat 4 is the valve devices run according to the expansion of the such as heat sensitive wax in temperature sensitive portion and contraction, and is designed so that the cooling passage when coolant temperature is relatively low between radiator 3 and electric coolant pump 2 is closed to prevent cooling liquid inflow radiator 3(engine coolant passage 201).On the other hand, when the warming-up of motor 1 completes, namely, when coolant temperature is relatively high, thermostat 4 runs according to coolant temperature (opening its valve), to allow a part of inflow radiator 3 of cooling liquid, the heat reclaimed by cooling liquid is discharged into the atmosphere from radiator 3.Incidentally, in this embodiment, thermostat 4 has been set to open when the environment cools liquid temp (approximating the temperature of wax) in temperature sensitive portion reaches coolant temperature (such as, 82 DEG C or the higher) time higher than the Opening valve temperature (such as, 70 DEG C) of the changing valve 10 described after a while.
Heater Channels 202 is the bypass passageways of motor 1 being carried out to bypass.Cooler for recycled exhaust gas 7, exhaust heat recovery apparatus 6 and heater 5 are connected in series on Heater Channels 202 by the above-mentioned order enumerated from the upstream side of coolant flow.The cooling liquid of discharging from electric coolant pump 2 circulates by the order of " cooler for recycled exhaust gas 7 → exhaust heat recovery apparatus 6 → heater 5 → thermostat 4 → electric coolant pump 2 ".Heater connecting passage 202a is connected to the Heater Channels 202 between cooler for recycled exhaust gas 7 and exhaust heat recovery apparatus 6.Heater connecting passage 202a is connected to the coolant jacket outlet of the cooling liquid outlet 1b(cylinder head of motor 1 via changing valve 10).Changing valve (control valve) 10 opens and closes heater connecting passage 202a.Be described to the details of changing valve 10 after a while.
The heat exchanger that heater 5 heats for utilizing the compartment of the heat of cooling liquid to vehicle, and be arranged to the ajutage towards air conditioner.Specifically, achieve following design: make (when heater is connected) flows in ajutage when compartment is heated air-conditioner wind by the heater 5(heater heart) and the warm braw that obtains be fed into compartment, and make At All Other Times (such as, during cooling) (when heater turns off), air-conditioner wind walks around heater 5.On heater 5, be furnished with calorifier inlets cooling-water temperature transmitter 22.The output signal of calorifier inlets cooling-water temperature transmitter 22 is imported into ECU300.Incidentally because the entrance coolant temperature of heater 5 with in Heater Channels 202(bypass passageways) in the temperature of cooling liquid that flow equal, so calorifier inlets cooling-water temperature transmitter 22 is corresponding to bypass cooling-water temperature transmitter.
Exhaust heat recovery apparatus 6 is so a kind of heat exchangers: be the object utilizing cooling liquid to reclaim heat from exhaust, this heat exchanger is arranged on the exhaust passage of motor 1.The warming-up of the heat reclaimed by exhaust heat recovery apparatus 6 for motor and the heating in compartment.Cooler for recycled exhaust gas 7 is so a kind of heat exchangers: this heat exchanger is arranged in and is back in the EGR channel of gas-entered passageway by a part for the exhaust of flowing in the exhaust passage of motor 1, to reach cooling object by the EGR gas of (backflow) in EGR channel.
Next, with reference to Fig. 2 A and Fig. 2 B, the changing valve 10 used in cooling system is described.
In this embodiment, changing valve 10 comprises housing 11, valve body 12, compression disc spring 13 and temperature sensitive portion 14 etc.
Housing 11 is provided with: cooling liquid entrance 11a, and it is connected to cooling liquid outlet (the coolant jacket opening of the cylinder head) 1b of the motor 1 shown in Fig. 1; Radiator connection opening 11b, it is connected to radiator 3; And heater connection opening 11c.Heater connection opening 11c is connected to Heater Channels 202 through heater connecting passage 202a as shown in Figure 1.
The inside of housing 11 is provided with valve seat 111 facing with each other and spring seat 112.Space (space on the upstream side of valve body 12) between valve seat 111 and spring seat 112 forms cooling liquid introduction part 11d.Cooling liquid entrance 11a is communicated with cooling liquid introduction part 11d.Radiator connection opening 11b is communicated with cooling liquid entrance 11a via cooling liquid introduction part 11d.In addition, the space on the downstream side of valve body 12 forms cooling liquid leading-out portion 11e, and heater connection opening 11c is communicated with cooling liquid leading-out portion 11e.
Between the valve seat 111 that valve body 12 is arranged in housing 11 inside and spring seat 112, thus valve seat 111 can be contacted and be separated with valve seat 111.This valve body 12 and temperature sensitive portion 14(describe after a while) casing 141 be integrated together.In addition, compression disc spring 13 is placed between valve body 12 and spring seat 112.Due to the elastic force of compression disc spring 13, valve body 12 is promoted by towards valve seat 111.
Temperature sensitive portion (temperature sensitive final controlling element) 14 comprises casing 141 and bar 142.Bar 142 is the rod-shaped member extended along the opening and closing direction of valve body 12, and is arranged to and freely can slides relative to casing 141.Bar 142 penetrates valve body 12.Valve body 12 can slide along opening and closing direction relative to bar 142.In addition, the distal portion of bar 142 penetrates the wall body of wall body 11f(in the side contrary with cooling liquid entrance 11a of housing 11), and this distal portion is kept by bar retaining member 16.
The inside of the casing 141 in temperature sensitive portion 14 is filled with heat sensitive wax 143, expands and shrink due to the change (that is, the change of wax temperature) of the environment cools liquid temp (hereafter also referred to as changing valve environment cools liquid temp) in temperature sensitive portion 14.The expansion of heat sensitive wax 143 and contraction change the overhang of bar 142 relative to casing 141.Incidentally, heat sensitive wax 143 is contained in the sealing component 144 be made up of rubber etc.
In the changing valve 10 with structure as above, when changing valve environment cools liquid temp (approximating wax temperature) Tvw is lower than predetermined value (being 70 DEG C in this embodiment), there is following state: bar 142 is little (namely from the amount that casing 141 is outstanding, the amount that bar 142 is absorbed in casing 141 is large), thus by the elastic force of compression disc spring 13, valve body 12 is positioned at (that is, closedown) (Fig. 2 A) on valve seat 111.When become from changing valve environment cools liquid temp Tvw described in this valve closing state equal or higher than predetermined value (equal or higher than 70 DEG C) time, the heat sensitive wax 143 in temperature sensitive portion 14 expands.Due to the expansion of heat sensitive wax 143, bar 142 increases from the amount that casing 141 is outstanding, whole temperature sensitive portion 14, i.e. valve body 12 moves along the direction away from valve seat 111, overcomes the elastic force of compression disc spring 13, make valve body 12 be separated (opening) (Fig. 2 B) with valve seat 111.
Therefore, when changing valve environment cools liquid temp Tvw is lower than predetermined value (70 DEG C), changing valve 10 is in closed condition in this embodiment, the motor 1(engine coolant passage 201 wherein shown in Fig. 1) the Heater Channels 202 shown in cooling liquid outlet 1b and Fig. 1 covered each other (liquid circulation between engine coolant passage and bypass passageways is restricted).On the other hand, when changing valve environment cools liquid temp Tvw is greater than or equal to predetermined value (being greater than or equal to 70 DEG C), changing valve 10 is in valve opening state, wherein motor 1(engine coolant passage 201) the Heater Channels 202 shown in cooling liquid outlet 1b and Fig. 1 communicate with each other.Incidentally, when the thermostat 4 shown in Fig. 1 is in valve closing state, although cooling liquid entrance 11a and radiator connection opening 11b communicates with each other, the cooling liquid having flowed into cooling liquid entrance 11a can not inflow radiator connection opening 11b.
It should be noted that, in changing valve 10 in this embodiment, electric heater 15 is embedded in temperature sensitive portion 14 herein.By being energized the heat fusing heat sensitive wax 143 making to be produced by electric heater 15 for electric heater 15, can unsteady state operation valve 10 in opened condition.Due to heater be energized the changing valve 10 caused open be during the cooling-water temperature transmitter abnormality juding process described after a while (about calorifier inlets coolant temperature 22 normal second judge time) etc. perform.Incidentally, the electric heater 15 of operation transformation valve 10 is carried out by changing valve controller (not shown).Changing valve controller performs the energising of the electric heater 15 of changing valve 10 according to the valve opening request from ECU300.
With reference to Fig. 3 and Fig. 4, the flowing of the cooling liquid of the cooling passage of the cooling system of the motor 1 cycled through shown in Fig. 1 is described.
First, during the cold state of motor, environment cools liquid temp Tvw due to the temperature sensitive portion 14 of changing valve 10 is low (being less than 70 DEG C), so changing valve 10 is in closed condition, with make the cooling liquid of (in coolant jacket) in motor 1 by being stopped (in motor, cooling liquid stops).Due to this point, motor 1 rapid warming-up.In addition, when changing valve 10 is in closed condition, due to the operation of electric coolant pump 2, liquid circulation is by Heater Channels 202 as shown in Figure 3A, and cooling liquid is by the sequential flowing of " electric coolant pump 2 → cooler for recycled exhaust gas 7 → exhaust heat recovery apparatus 6-heater 5 → thermostat 4 → electric coolant pump 2 ".If there is compartment heat request during rapid warming-up as above, then the heat reclaimed by exhaust heat recovery apparatus 6 is enough to make up the heat needed for heater 5.
Next, when motor 1 become half warming-up and the environment cools liquid temp Tvw in the temperature sensitive portion 14 of changing valve 10 become equal or higher than predetermined value (equal or higher than 70 DEG C) time, changing valve 10 is opened.When changing valve 10 is opened, except the liquid circulation in Heater Channels 202, cooling liquid is also by the sequential flowing of " cooling liquid outlet 1b → changing valve 10 → heater connecting passage 202a of inside (in the coolant jacket) → motor 1 of the cooling liquid entrance 1a → motor 1 of electric coolant pump 2 → motor 1 ", as shown in Figure 3 B, to make motor 1 cool.In addition, when changing valve 10 in opened condition time, the cooling liquid mixing in engine coolant passage 201 in the cooling liquid of (in motor 1) and Heater Channels (bypass passageways) 202.
Then, when motor 1 reaches complete warm-up mode, thermostat 4 runs (opening its valve) to make a part of inflow radiator 3 of cooling liquid, and as shown in Figure 4, the heat therefore reclaimed by cooling liquid is discharged into the atmosphere from radiator 3.
Next, will be described ECU300.ECU300 comprises CPU, ROM, RAM, RAM for subsequent use etc.ROM stores the setting table etc. of various control program, the reference when various control program performs.CPU performs computing based on the various control program be stored in ROM and setting table.In addition, RAM be result of calculation for temporarily storing CPU, the storage of the data that input from various sensor etc.RAM for subsequent use needs the nonvolatile memory of the data stored etc. for the storage when motor 1 stops.
ECU300 is connected to the various sensors of the running state detecting motor 1, comprises engine coolant temperature sensor 21, intake air temperature sensor 23 and Air flow meter 24, as shown in Figure 1.In addition, ECU300 is also connected to calorifier inlets cooling-water temperature transmitter 22, ignition switch (not shown) etc.
ECU300 performs the various controls of motor 1 based on the output signal of various sensors of the running state carrying out Autonomous test motor, and the aperture comprising the throttle valve of motor 1 controls, fuel injection amount controls (opening/closing of sparger controls) etc.In addition, ECU300 also performs " process of cooling-water temperature transmitter abnormality juding " described below.
(example 1 of determination processing)
Be described with reference to the example of the flow chart shown in Fig. 5 to the abnormality juding process for calorifier inlets cooling-water temperature transmitter 22.ECU300 performs the process routine shown in Fig. 5.
Process routine shown in Fig. 5 starts from the time point (IG-ON) when ignition switch is connected.When the process routine shown in Fig. 5 starts, first ECU300 picks up the calorifier inlets coolant temperature thw2 existed when engine start in step ST101 from the output signal of calorifier inlets cooling-water temperature transmitter 22.Next, in step ST102, ECU300 reads in the abnormality decision value α (DEG C) of the determination processing of step ST105 for describing after a while and step ST110.This abnormality decision value α can be steady state value (such as, α=5 DEG C), or can also set changeably according to the coolant temperature existed during engine start with reference to setting table etc.Incidentally, abnormality decision value α (steady state value) or the setting table for calculating abnormality decision value α are stored in the ROM of ECU300.
In step ST103, ECU300 calculates the integral value (∑ ga) of air inflow from engine start based on the output signal of Air flow meter 24.In step ST104, ECU300 judges whether air inflow integral value (∑ ga) is greater than or equal to specified value β [g].The time point (time point when reaching the state of ∑ ga >=β) of (YES) when result of determination is certainty judgement, ECU300 is judged to meet and judges precondition, then proceeds to step ST105.
Incidentally, about specified value β [g], by experiment, simulation etc., obtain the integral value (∑ ga) of air inflow in advance, and carry out applicable specified value β [g] based on the result obtained, then specified value β [g] is stored in the ROM of ECU300, the integral value of described air inflow to make from engine start by calorifier inlets cooling-water temperature transmitter 22(in normal state in following process) variable quantity (deviation) of detection coolant temperature value that provides becomes and is equal to, or greater than required for predetermined value (abnormality decision value α=5 [DEG C] or larger): in this process, coolant temperature in Heater Channels 202 is owing to passing through exhaust heat recovery apparatus 6, cooler for recycled exhaust gas 7 grade raises from the heat trnasfer be vented to the heat of the cooling liquid of circulation Heater Channels 202.
In step ST105, ECU300 calculates calorifier inlets coolant temperature thw2(checkout value based on the output signal of the calorifier inlets cooling-water temperature transmitter 22 obtained when air inflow integral value (∑ ga) becomes and is equal to, or greater than specified value β [g]) deviation (, itself and the deviation (thw2 deviation) of detection calorifier inlets coolant temperature value obtained when engine start), and then judge whether thw2 deviation is greater than or equal to the abnormality decision value α [DEG C] (will carry out first normally to judge) read in step ST102.If it is determined that result be certainty judge (YES) (if thw2 deviation >=α), then ECU300 judge calorifier inlets cooling-water temperature transmitter 22 normal (step ST111).If the result of determination in step ST105 is negativity judge (no) (if thw2 deviation < is α), then ECU300 proceeds to step ST106.
It should be noted herein, if the result of determination in step ST105 is negativity judge (no), then ECU300 can not determine whether there is the situation of " calorifier inlets cooling-water temperature transmitter 22 is abnormal " or the situation of " exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 break down ".Therefore, in this example, after changing valve 10 is forced open, performs and normally judge about second of calorifier inlets cooling-water temperature transmitter 22, as described later.
In step ST106, ECU300 is by outputting to the energising that changing valve controller starts the electric heater 15 of changing valve 10 by valve opening request.Incidentally, the time of ECU300 to energising from the electric heater 15 of changing valve 10 lights elapsed time and counts.
Next, in step ST107, ECU300 determines whether " changing valve is without cut out status fault ".If it is determined that result is certainty judge (YES), then ECU300 proceeds to step ST108.If the result of determination in step ST107 is negativity judge (no), then ECU300 does not perform the normal or abnormal judgement (step ST113 wherein skips judgement) about calorifier inlets cooling-water temperature transmitter 22.Incidentally, term " closed condition fault " refers to that valve is in closed condition and the fault that can not open herein.
The example of the determination processing to step ST107 is specifically described.When changing valve 10 has closed condition fault, even if heater 15 is energized, the cooling liquid in motor 1 also keeps static, and the increasing amount of the engine coolant temperature thw1 therefore detected by engine coolant temperature sensor 21 is large.On the other hand, in the normal situation (situation of cryogenic liquid inflow engine 1) of changing valve 10, engine coolant temperature thw1(checkout value) increasing amount relatively little (or detect coolant temperature value thw1 decline).Utilize this point, if the increasing amount of the engine coolant temperature thw1 detected by engine coolant temperature sensor 21 after heater 15 is energized is less than predetermined value, then ECU300 is judged to be " changing valve is without cut out status fault ", and proceeds to step ST108.Incidentally, when needs acquisition engine coolant temperature sensor 21 is normal judgement, ECU300 is calculation engine coolant temperature thw1(checkout value such as) and intake temperature tha(checkout value) between difference [thw1-tha], and judge temperature difference [thw1-tha] whether in prespecified range (such as,-20 DEG C≤thw1-tha≤20 DEG C), and if result of determination is certainty judge that (YES) is then judged to be that engine coolant temperature sensor 21 is normal.
Incidentally, when changing valve 10 is equipped with the sensor detecting valve lifting capacity, the presence or absence of " the closed condition fault of changing valve " can be judged based on the checkout value provided by valve lifting sensor.
In step ST108, whether ECU300 judges supercooling liquid hybrid standard time after the time point that the energising of the electric heater 15 of changing valve 10 starts.When fully mixing based on the amount of time opened to changing valve 10 actual the energising from electric heater 15 and the cooling liquid from the cooling liquid being opened to (in motor 1) engine coolant passage 201 and Heater Channels 202 of changing valve 10, the amount of time of (when the temperature to the cooling liquid in Heater Channels 202 fully raises) comes " the cooling liquid hybrid standard time " that uses in the process of applicable step ST108.
Specifically, when changing valve 10 is opened, the condition of maximum duration is needed (such as based on when being energized from the electric heater 15 of changing valve 10, performing free-runing operation and motor is in the condition of low temperature environment), by experiment, simulation etc. is applicable to time (time 1) (see figure 6) opened needed for changing valve 10.In addition, about (in motor 1) in engine coolant passage 201 fully the mixing of cooling liquid and the cooling liquid in Heater Channels 202 needed for time (time 2) (see figure 6), time 2 is inversely proportional to the flow of the cooling liquid in the motor 1 occurred after changing valve 10 is opened, and therefore considers this point when coming applicable the time 2 based on experiment, simulation etc." value [the time 1+ time 2] " that obtains by suing for peace to " opening the time (time 1) needed for valve " of being applicable to and " time (time 2) needed for combination cooling liquid " that is applicable to is set to " the cooling liquid hybrid standard time " that uses in the determination processing of step ST107.
Then, time point when elapsed time reaches the above-mentioned cooling liquid hybrid standard time after the energising of electric heater 15 starts (result of determination in step ST108 is the time point of certainty when judging (YES)), ECU300 interrupts the request of conversion valve opening, and stop the energising (step ST109) of the electric heater 15 of changing valve 10, then proceed to step ST110.
In step ST110, ECU300 calculates calorifier inlets coolant temperature thw2(checkout value based on the output signal of calorifier inlets cooling-water temperature transmitter 22) deviation (namely, itself and (when the engine starts) deviation (thw2 deviation) of detection calorifier inlets coolant temperature value of obtaining when changing valve is opened), then judge whether thw2 deviation is greater than or equal to the abnormality decision value α [DEG C] (the second normally judgement) read in step ST102.If it is determined that result is certainty judge (YES) (if thw2 is deviation >=α), then ECU300 judges calorifier inlets cooling-water temperature transmitter 22 normal (step ST111).If the result of determination in step ST110 is negativity judge (no) (if thw2 deviation < is α), then ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 has card and stops exception (step ST112).
Next, with reference to Fig. 6, the concrete example of the abnormality juding process about calorifier inlets cooling-water temperature transmitter 22 is described.Incidentally, Fig. 6 show normal at calorifier inlets cooling-water temperature transmitter 22 and due to the fault of exhaust heat recovery apparatus 6 and cooler for recycled exhaust gas 7 cause bypass passageways not have available thermal source, calorifier inlets coolant temperature thw2(checkout value) the example of change.
First, when become when the air inflow integral value (∑ ga) from engine start be greater than or equal to specified value β [g] time (first normally judge) calorifier inlets coolant temperature thw2(checkout value of obtaining) deviation be greater than or equal to abnormality decision value α [DEG C], ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 is normal.On the other hand, become when air inflow integral value (∑ ga) be greater than or equal to specified value β [g] time (first normally judge) calorifier inlets coolant temperature thw2(checkout value of obtaining) deviation be less than abnormality decision value α [DEG C] situation (ECU300 can not determine the situation of the situation of existences " calorifier inlets cooling-water temperature transmitter 22 exception " or the situation of " exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 break down ") under, ECU300 starts the energising of the electric heater 15 of changing valve 10, as shown in Figure 6.
Changing valve 10 due to the energising of electric heater actual open after, high temperature coolant from motor 1 flows into Heater Channels 202 and coolant temperature therefore in Heater Channels 202 raises, even if exhaust heat recovery apparatus 6 and/or cooler for recycled exhaust gas 7 break down.Then, when the well-mixed state of the cooling liquid in the cooling liquid reaching (in motor 1) in engine coolant passage 201 and Heater Channels 202, the temperature of the cooling liquid in Heater Channels 202 becomes abundant height.Now, if calorifier inlets cooling-water temperature transmitter 22 is normal, the calorifier inlets coolant temperature thw2(checkout value then detected by this cooling-water temperature transmitter 22) change quantitative change large, the deviation of calorifier inlets coolant temperature thw2 is become and is equal to, or greater than abnormality decision value α [DEG C] (Fig. 6).On the other hand, when calorifier inlets cooling-water temperature transmitter 22 have card stop exception (checkout value card is parked in the exception of low coolant temperature value), coolant temperature entrance coolant temperature thw2(checkout value) do not raise, but in fact the temperature of the cooling liquid in Heater Channels 202 raises, the deviation of calorifier inlets coolant temperature thw2 can not be become and be equal to, or greater than abnormality decision value α [DEG C].
In view of these point, in this example, the deviation (deviation of the detection calorifier inlets coolant temperature value that itself and (when the engine starts) when opening when changing valve obtain) of the calorifier inlets coolant temperature thw2 detected by calorifier inlets cooling-water temperature transmitter 22 when the cooling liquid in the cooling liquid and Heater Channels 202 of (in motor 1) in engine coolant passage 201 becomes fully mixing is greater than or equal to abnormality decision value α (such as, α=5 [DEG C]) situation (namely, the situation of thwe deviation >=α) under, ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 is normal.When the deviation of calorifier inlets coolant temperature thw2 is less than abnormality decision value α, ECU300 is judged to be that calorifier inlets cooling-water temperature transmitter 22 has card and stops exception.
As mentioned above; in the abnormality juding process of this example; determining by under normally determine the abnormal situation of calorifier inlets cooling-water temperature transmitter 22 (situation that calorifier inlets cooling-water temperature transmitter 22 exception or exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 break down) about first of calorifier inlets cooling-water temperature transmitter 22; changing valve 10 is opened, and to flow in Heater Channels 202 and the temperature of cooling liquid therefore in Heater Channels 202 raises to make the high temperature coolant from motor 1.During the state that this coolant temperature raises, the thw2 deviation (variable quantity) based on the bypass coolant temperature detected by calorifier inlets cooling-water temperature transmitter 22 performs and normally judges about second of calorifier inlets cooling-water temperature transmitter 22.Therefore, even if when causing bypass passageways not have available thermal source because exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 etc. break down, also accurately can determine calorifier inlets cooling-water temperature transmitter 22(bypass cooling-water temperature transmitter) the presence or absence of exception, and the judgement that can not make mistake.
Incidentally, although in the examples described above, process routine shown in Fig. 5 starts from the time point (IG-ON) when ignition switch is connected, when being equipped with the vehicle of motor 1 for also starting the process routine shown in Fig. 5 when there is engine start request when motor vehicle driven by mixed power.
(example 2 of determination processing).
Although in the example 1 of determination processing, the time point changing valve 10 determined after the energising of the electric heater 15 of changing valve 10 starts when certain hour (time 1) is opened, the also environment cools liquid temp Tvw in the temperature sensitive portion 14 of tolerable estimation changing valve 10, and judge whether changing valve 10 is opened based on the estimated value of changing valve environment cools liquid temp Tvw.
Specifically, utilize the engine coolant temperature thw1 detected by engine coolant temperature sensor 21, ECU300 estimates changing valve environment cools liquid temp Tvw based on setting table or calculation expression.Time point when the estimated value of changing valve environment cools liquid temp Tvw reaches Opening valve temperature (70 DEG C) of changing valve 10, ECU300 is judged to be " changing valve 10 is opened ".Then, after time point when determining valve 10 and opening after above-mentioned set time (time 2) (time that the coolant temperature in Heater Channels 202 is required before fully raising), perform the normal judgement (performing the determination processing of the step ST110 in Fig. 5) about calorifier inlets cooling-water temperature transmitter 22.
Therefore, in the valve opening condition judgement process of this example, owing to determining the existence of the open mode of changing valve 10 based on the estimated value of changing valve environment cools liquid temp Tvw, so, compared with the above-mentioned valve opening condition judgement process of the example 1 of determination processing, namely, after starting with based on being energized at electric heater 15, elapsed time determines compared with the situation of the existence of the open mode of changing valve 10, can implement at short notice normally to judge about second of calorifier inlets cooling-water temperature transmitter 22.
That is, in the example 1 of determination processing, the mistake opened to prevent from making when changing valve 10 is in fact not yet opened changing valve 10 judges, the applicable cooling liquid hybrid standard time is carried out based on needing the condition of maximum duration (such as, the race of engine and motor are in the condition of low temperature environment) before opening at changing valve 10.But be applicable to for this, nargin is very big, therefore before performing the second normal judgement about calorifier inlets cooling-water temperature transmitter 22, certainly exist the long time.But, determine the design that changing valve 10 has been opened during by adopting and making the estimated value as changing valve environment cools liquid temp (approximating wax temperature) Tvw reach Opening valve temperature (70 DEG C), become and can judge that changing valve 10 is opened according to actual the opening of changing valve 10.Which eliminate the needs that above-mentioned nargin is provided, the time before making it possible to shorten about the normal judgement (second normally judges) of calorifier inlets cooling-water temperature transmitter 22.
Incidentally, although the detection coolant temperature value detected by engine coolant temperature sensor 21 is in the examples described above for estimating changing valve environment cools liquid temp Tvw, the estimated value of engine coolant temperature thw1 also can be used for estimation changing valve environment cools liquid temp Tvw.Hereafter be described to the example of estimation.
First, ECU300 based on the engine speed Ne calculated according to the output signal of engine rotation speed sensor (not shown) and load-factor k1 with reference to by experiment, the setting table that is applicable in advance such as simulation carrys out in calculation engine 1 cooling loss Qw.Incidentally, load-factor k1 can be calculated as the value of the ratio such as representing current loads and maximum engine load by referring to setting table etc. based on engine speed Ne and suction pressure.
Next, utilize the cooling loss Qw calculated, ECU300 is based on representation (1) below, that is, the Laplace transform representation of engine coolant temperature thw1, carrys out the estimated value of calculation engine coolant temperature thw1.In addition, utilize the estimated value of the engine coolant temperature thw1 calculated, ECU300 calculates the estimated value of changing valve environment cools liquid temp Tvw according to representation (2) below.
laplace transformation
C: thermal capacity [J/ DEG C]
λ: the heat conductivity [W/ (m DEG C)] between focus
L: the distance [m] between focus
A: the heat-conducting area [m between focus
2]
α and β: constant
Herein, the value that the parameter C in above-mentioned representation (1), λ, L and A are applicable under being set to the hypothesis of the cooling liquid quality of the highest temperature portion in the coolant jacket of cylinder head between the cooling liquid withholding period in motor 1.
In addition, the estimated value of changing valve environment cools liquid temp Tvw can also be calculated by other technology.Such as, computing technique below can be adopted.That is, utilize engine speed Ne and load-factor k1 as parameter, by experiment, simulation etc. obtains the coolant temperature at the cooling liquid outlet 1b place of motor 1.Based on the result obtained, in advance by experiment, simulation etc. is applicable to and the estimated value of Mapping and Converting valve collar border coolant temperature Tvw.Then, by coming, with reference to setting table, to calculate the estimated value of changing valve environment cools liquid temp Tvw based on the engine speed Ne of reality and the load-factor k1 of reality.
Although in above-described embodiment and example, the changing valve 10 that the temperature sensitive portion that valve body is shifted is housed is used as the control valve of the liquid circulation controlled between engine coolant passage and Heater Channels (bypass passageways), but the present invention is not limited thereto, namely, also tolerable uses the control valve opened and closed by dissimilar final controlling element (such as, solenoid etc.).
Although in above-described embodiment and example, electric coolant pump is used for the circulation of cooling liquid, the present invention is not limited thereto, namely, goes back tolerable and use mechanical coolant pump for the circulation of cooling liquid.
Although in above-described embodiment and example, the present invention is applied to the cooling system that heater, exhaust heat recovery apparatus and cooler for recycled exhaust gas merge into heat exchanger, but the present invention also can be applicable to except exhaust heat recovery apparatus and cooler for recycled exhaust gas, also merge such as ATF(automatic fluid transmission) cooling system of the heat exchanger such as heater, ATF cooler.
The present invention can be used in the presence or absence cooling-water temperature transmitter abnormity determining device of the exception of the cooling-water temperature transmitter of the coolant temperature judging the heater system detected in the cooling system of motor (internal-combustion engine).
Claims (6)
1. one kind is applied to the cooling-water temperature transmitter abnormity determining device of engine-cooling system, described engine-cooling system comprises: cooling passage (200), it bypass passageways (202) comprising engine coolant passage (201) and motor (1) is carried out to bypass, control valve (10), it can be in open mode and can be in closed condition, the cooling liquid from described engine coolant passage (201) and the cooling liquid from described bypass passageways (202) mixing in described engine coolant passage (201) and the intersection between described bypass passageways (202) is allowed under described open mode, the described cooling liquid from described engine coolant passage (201) is limited and the described cooling liquid from described bypass passageways (202) mixes with the described of described intersection between described bypass passageways (202) described engine coolant passage (201) under described closed condition, and bypass cooling-water temperature transmitter (22), it is arranged in the downstream of the described intersection in described cooling passage (200), between described engine coolant passage (201) and described bypass passageways (202), and described bypass cooling-water temperature transmitter (22) detects bypass coolant temperature, and described cooling-water temperature transmitter abnormity determining device judges that whether described bypass cooling-water temperature transmitter (22) is abnormal, and the feature of described cooling-water temperature transmitter abnormity determining device is to comprise
Decision device (300), if the increasing amount of the checkout value of the described bypass coolant temperature obtained when described bypass coolant temperature is estimated as and is equal to, or greater than the first predetermined value is less than the second predetermined value, so described decision device (300) opens described control valve (10), and judges that whether described bypass cooling-water temperature transmitter (22) is abnormal based on the variable quantity of the described checkout value of the described bypass coolant temperature obtained after opening at described control valve (10).
2. cooling-water temperature transmitter abnormity determining device according to claim 1, wherein:
If after described control valve (10) is opened, the described increasing amount of the described checkout value of described bypass coolant temperature becomes and is equal to, or greater than described second predetermined value, and described bypass cooling-water temperature transmitter (22) is judged to be normally by so described decision device (300); And
If after described control valve (10) is opened, the described increasing amount of the described checkout value of described bypass coolant temperature is less than described second predetermined value, and described bypass cooling-water temperature transmitter (22) is judged to be exception by so described decision device (300).
3. cooling-water temperature transmitter abnormity determining device according to claim 1 and 2, wherein, described bypass passageways (202) is provided with at least one in exhaust heat recovery apparatus (6) and cooler for recycled exhaust gas (7).
4. cooling-water temperature transmitter abnormity determining device according to claim 1 and 2, wherein:
Described control valve (10) is temperature sensitive operating valve, and it has the temperature sensitive portion (14) that valve body (12) is shifted; And
Described cooling-water temperature transmitter abnormity determining device comprises valve opening condition judgement device, when the estimated value of the environment cools liquid temp of described control valve (10) becomes the Opening valve temperature being equal to, or greater than described control valve (10), described valve opening condition judgement device judges that described control valve (10) is opened.
5. cooling-water temperature transmitter abnormity determining device according to claim 1 and 2, wherein, after described control valve (10) is opened after a predetermined time after, described decision device (300) performs about the judgement of described bypass cooling-water temperature transmitter (22).
6. the cooling-water temperature transmitter abnormality determination method used in engine-cooling system, described engine-cooling system comprises: cooling passage (200), it bypass passageways (202) comprising engine coolant passage (201) and motor (1) is carried out to bypass, control valve (10), it can be in open mode and can be in closed condition, the cooling liquid from described engine coolant passage (201) and the cooling liquid from described bypass passageways (202) mixing in described engine coolant passage (201) and the intersection between described bypass passageways (202) is allowed under described open mode, the described cooling liquid from described engine coolant passage (201) is limited and the described cooling liquid from described bypass passageways (202) mixes with the described of described intersection between described bypass passageways (202) described engine coolant passage (201) under described closed condition, and bypass cooling-water temperature transmitter (22), it is arranged in the downstream of the described intersection in described cooling passage (200), between described engine coolant passage (201) and described bypass passageways (202), and described bypass cooling-water temperature transmitter (22) detects bypass coolant temperature, and described cooling-water temperature transmitter abnormality determination method judges that whether described bypass cooling-water temperature transmitter (22) is abnormal, and the feature of described cooling-water temperature transmitter abnormality determination method is to comprise:
When described bypass coolant temperature be estimated as be equal to, or greater than the first predetermined value time, use described bypass cooling-water temperature transmitter (22) to detect described bypass coolant temperature,
If the increasing amount of the described bypass coolant temperature detected is greater than or equal to the second predetermined value, so described bypass cooling-water temperature transmitter (22) is judged to be normally; And
If the described increasing amount of the described bypass coolant temperature detected is less than described second predetermined value, then open described control valve (10), and after described control valve (10) is opened, use described bypass cooling-water temperature transmitter (22) again to detect described bypass coolant temperature, and before and after opening based on described control valve (10) between the variable quantity of described bypass coolant temperature judge that whether described bypass cooling-water temperature transmitter (22) abnormal.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2010-253208 | 2010-11-11 | ||
| JP2010253208A JP5218526B2 (en) | 2010-11-11 | 2010-11-11 | Water temperature sensor abnormality determination device |
| PCT/IB2011/002627 WO2012063114A1 (en) | 2010-11-11 | 2011-11-08 | Abnormality determination apparatus and abnormality determination method for coolant temperature sensor, and engine cooling system |
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| CN103189611A CN103189611A (en) | 2013-07-03 |
| CN103189611B true CN103189611B (en) | 2015-07-22 |
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| Country | Link |
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| US (1) | US20130213600A1 (en) |
| EP (1) | EP2638264B1 (en) |
| JP (1) | JP5218526B2 (en) |
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| US20130213600A1 (en) | 2013-08-22 |
| EP2638264B1 (en) | 2016-12-21 |
| EP2638264A1 (en) | 2013-09-18 |
| WO2012063114A1 (en) | 2012-05-18 |
| JP2012102688A (en) | 2012-05-31 |
| CN103189611A (en) | 2013-07-03 |
| JP5218526B2 (en) | 2013-06-26 |
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