CN103189611A - 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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- CN103189611A CN103189611A CN2011800532012A CN201180053201A CN103189611A CN 103189611 A CN103189611 A CN 103189611A CN 2011800532012 A CN2011800532012 A CN 2011800532012A CN 201180053201 A CN201180053201 A CN 201180053201A CN 103189611 A CN103189611 A CN 103189611A
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- temperature transmitter
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- 239000002826 coolant Substances 0.000 title claims abstract description 187
- 230000005856 abnormality Effects 0.000 title claims abstract description 42
- 238000001816 cooling Methods 0.000 title claims description 48
- 238000000034 method Methods 0.000 title claims description 22
- 239000000498 cooling water Substances 0.000 claims description 137
- 239000007788 liquid Substances 0.000 claims description 42
- 238000011084 recovery Methods 0.000 claims description 25
- 230000004087 circulation Effects 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 239000000110 cooling liquid Substances 0.000 description 85
- 239000007789 gas Substances 0.000 description 18
- 238000012545 processing Methods 0.000 description 18
- 238000001514 detection method Methods 0.000 description 14
- 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
- 230000008602 contraction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction 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
- 230000036316 preload Effects 0.000 description 1
- 230000002265 prevention Effects 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
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- 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 judge unusual existence or non-existent cooling-water temperature transmitter abnormity determining device and the cooling-water temperature transmitter abnormality determination method of the cooling-water temperature transmitter of cooling system.
Background technique
For the motor that is installed in vehicle etc., be arranged in the motor (cylinder block or cylinder head) as the coolant jacket of cooling passage, and make cooling liquid circulate to cool off whole motor (or warming-up) via coolant jacket by coolant pump.Be associated with this cooling system, there is a kind of like this technology: be provided with the changing valve that is limited in the liquid circulation between engine coolant passage and the heater system (heater passage), and when engine cold, changing valve cuts out to stop cooling liquid passing through in (at coolant jacket) (carrying out cooling liquid prevention in the motor) in motor, thereby realize the rapid warming-up (for example, referring to publication No. being the Japanese patent application (JP-A-2009-150266) of 2009-150266) of motor.
Carrying out the cooling system that cooling liquid stops in the above-mentioned motor for example is provided with: engine coolant temperature sensor, and it detects the outlet coolant temperature of motor; And heater system cooling-water temperature transmitter (for example, the calorifier inlets cooling-water temperature transmitter), it detects the coolant temperature in the heater system.As the unusual method for detecting abnormality that detects the heater system cooling-water temperature transmitter, there is a kind of like this method: behind engine start, (for example do not raise as yet under predetermined value or the bigger situation by the detected detection coolant temperature of heater system cooling-water temperature transmitter through finding after the certain hour section, be the Japanese patent application (JP-A-10-073047) of 10-073047 referring to publication No.), judge that the heater system cooling-water temperature transmitter is unusual.Incidentally, the unusual card that is exemplified as of cooling-water temperature transmitter stops (stuck) unusually, and in described card stopped unusually, sensor values was fixed on some values.
Incidentally, for carrying out the cooling system that cooling liquid stops in the above-mentioned motor, be applied at aforementioned method for detecting abnormality under the situation of the abnormality juding relevant with the heater system cooling-water temperature transmitter, if be arranged in the heater system thermal source (for example, exhaust heat recovery apparatus etc.) break down etc., though then behind engine start through after the certain hour section temperature of the cooling liquid in the heater system do not rise yet.Therefore, the detection coolant temperature value that provides owing to the heater system coolant temperature does not rise, so following situation takes place sometimes: although sensor is actually normally, the heater system cooling-water temperature transmitter is judged to be mistakenly unusually.
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 that stops cooling liquid in motor, to be passed through, cooling-water temperature transmitter abnormity determining device and cooling-water temperature transmitter abnormality determination method can judge accurately whether the cooling-water temperature transmitter of the temperature that detects the cooling liquid in the heater system is unusual, and can not do the judgement that makes mistake.
Cooling-water temperature transmitter abnormity determining device according to first scheme of the present invention is the cooling-water temperature transmitter abnormity determining device that is applied to engine-cooling system (carrying out the cooling system that cooling liquid stops in the motor), and described engine-cooling system comprises: the engine coolant passage; Motor is carried out the bypass passageways (heater passage) of bypass; Control valve (changing valve), it is limited in the liquid circulation between engine coolant passage and the bypass passageways; And bypass cooling-water temperature transmitter (calorifier inlets cooling-water temperature transmitter), it detects the bypass coolant temperature in the bypass passageways, and described cooling-water temperature transmitter abnormity determining device judges whether the bypass cooling-water temperature transmitter is unusual, and described cooling-water temperature transmitter abnormity determining device comprises decision device, if when described bypass coolant temperature is estimated as when being equal to, or greater than predetermined value (particularly, for example, when the air inflow that sucks motor (integral value of air inflow after the engine start time point) becomes when being equal to, or greater than predetermined value) increasing amount of the checkout value of the bypass coolant temperature that obtains is less than predetermined value, so described decision device is opened described control valve, and based on the variable quantity of the checkout value of the described bypass coolant temperature that obtains after described control valve is opened described bypass cooling-water temperature transmitter is judged to be unusually.
In addition, in the cooling-water temperature transmitter abnormity determining device according to 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 predetermined value, so described decision device can be judged to be described bypass cooling-water temperature transmitter normally, 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 predetermined value, so described decision device can be judged to be described bypass cooling-water temperature transmitter normally, and, if after described control valve is opened, the increasing amount of the described checkout value of described bypass coolant temperature is less than predetermined value, and so described decision device can be judged to be described bypass cooling-water temperature transmitter unusually.
In addition, in the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, described bypass passageways (heater passage) can be provided with exhaust heat recovery apparatus and the recirculation of EGR(waste gas) in the cooler at least one.
In the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, at first, be greater than or equal under the situation of predetermined value in the increasing amount that is estimated as when being equal to, or greater than predetermined value the sense channel coolant temperature value that (when the air quantity that sucks motor (integral value of air inflow after engine start) becomes when being equal to, or greater than predetermined value) obtain when the bypass coolant temperature (detecting the deviation of the detection bypass coolant temperature value that bypass coolant temperature value obtains with when engine start the time), install the bypass cooling-water temperature transmitter is judged to be normally.On the other hand, can expect, under the situation of aforementioned increasing amount less than predetermined value that detects bypass coolant temperature value, " bypass coolant temperature unusual " or " fault of the thermal source of bypass passageways ", thus device is opened the control valve that is limited in the liquid circulation between engine coolant passage and the bypass passageways.
Because control valve is opened, thus 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 motor heating.Even bypass passageways does not have available thermal source (even breaking down such as thermals source such as exhaust heat recovery apparatus, coolers for recycled exhaust gas), this also can make the temperature of the cooling liquid in the bypass passageways raise, and making is increased by the detected detection bypass of cooling-water temperature transmitter coolant temperature value under the normal situation of hypothesis bypass cooling-water temperature transmitter.Therefore, in aforementioned schemes of the present invention, utilize these points, the variable quantity that detects bypass coolant temperature value after control valve is opened is greater than or equal under the situation of predetermined value, device judges that the bypass cooling-water temperature transmitter is normal, and under the situation of variable quantity less than predetermined value that detects bypass coolant temperature value, this device is judged bypass cooling-water temperature transmitter unusual (having card stops unusually).
As mentioned above, according to the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, under the situation of increasing amount less than predetermined value that is estimated as when being equal to, or greater than predetermined value the detection bypass coolant temperature value that (when the air quantity that sucks motor becomes when being equal to, or greater than predetermined value) obtain when the bypass coolant temperature, described device is opened control valve to allow flowing into bypass passageways from the high temperature coolant of motor, make the temperature of the cooling liquid in the bypass passageways raise, and the state that keeps this coolant temperature to raise simultaneously is based on the judgement of being carried out by the variable quantity of the detected detection bypass of bypass cooling-water temperature transmitter coolant temperature value about the bypass cooling-water temperature transmitter.Therefore, even make bypass passageways not have available thermal source owing to exhaust heat recovery apparatus, cooler for recycled exhaust gas etc. breaks down, described device can judge accurately also whether the bypass cooling-water temperature transmitter is unusual, and can not do the judgement that makes mistake.
In addition, in the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, the control valve that is limited in the liquid circulation between engine coolant passage and the bypass passageways can be temperature sensitive operation valve, this temperature sensitive operation valve has the temperature sensitive portion that makes the valve body displacement, and when the estimated value of the environment cools liquid temp of control valve becomes when being equal to, or greater than the Opening valve temperature of control valve, the cooling-water temperature transmitter abnormity determining device can judge that control valve opens.The employing of this structure makes it possible to shorten the control valve opened required time whether of judging.Hereinafter will be explained.
At first, use the temperature sensitive operation valve conduct that for example has the temperature sensitive portion that makes the valve body displacement to be arranged on the control valve at the cooling liquid outlet place of motor according to the suitable cooling system of the cooling-water temperature transmitter abnormity determining device of aforementioned schemes (carrying out the cooling system that cooling liquid stops in the motor).In this case, electric heater is embedded in temperature sensitive and forces control valve to open (that is, owing to the energising of heater is opened) so that can also melt heat sensitive wax by the utilization heat that energising generates to electric heater.When the increasing amount of above-mentioned detection bypass coolant temperature value during less than predetermined value, switch on to open valve by making heater.Judge control valve whether the utilization elapsed time after the energising of electric heater begins that is exemplified as of opened method judge whether opened method of valve.
Determine under the situation that control valve opened in the endurance based on the energising of heater, in order to prevent not opening in fact as yet and make the mistake that control valve opened and judge when valve, opening valve state reference value is fit to based on following condition: before control valve is opened, need the longest time.Yet about this suitability, nargin is very big, makes to have the long time inevitably before carrying out about the normal or unusual judgement of bypass cooling-water temperature transmitter.Yet the method that the judgement control valve has been opened when being equal to, or greater than Opening valve temperature by adopting estimated value when the environment cools liquid temp of control valve to become can judge that control valve opens according to the open mode of the reality of valve.Because this has eliminated the needs that above-mentioned nargin is provided, only need the short time before having opened determining valve, thereby can shorten about the time before the normal or unusual judgement of bypass cooling-water temperature transmitter.
Should note herein, in the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, if carry out the judgement about the bypass cooling-water temperature transmitter during the state that the high temperature coolant after control valve has been opened in the engine coolant passage and the cooling liquid in the bypass passageways fully do not mix (temperature of the cooling liquid in the bypass passageways is the inabundant state that raises as yet), then have the possibility of in fact just often making the mistake judgement of sensor abnormality when sensor.Therefore, in the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, in order to prevent wrong abnormality juding, can be through after the scheduled time after control valve is opened, namely, coolant temperature in bypass passageways fully raises after the required effluxion, can carry out the judgement about the bypass cooling-water temperature transmitter.
According to the cooling-water temperature transmitter abnormity determining device according to aforementioned schemes, if be estimated as the increasing amount of the detection bypass coolant temperature value that obtains when being equal to, or greater than predetermined value when the bypass coolant temperature relatively little, then control valve is opened so that coolant temperature in the bypass passageways raises, and carries out unusual judgement about cooling-water temperature transmitter based on the variable quantity of the detection bypass coolant temperature value after control valve is opened then.Therefore, can accurately judge the unusual existence of bypass cooling-water temperature transmitter, and can not do the judgement that makes mistake.
According to the cooling-water temperature transmitter abnormality determination method of cooling-water temperature transmitter abnormality determination method for using in engine-cooling system of alternative plan of the present invention, described engine-cooling system comprises: the engine coolant passage; Motor is carried out the bypass passageways of bypass; Control valve, it is limited in the liquid circulation between engine coolant passage and the bypass passageways; And bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in the bypass passageways, and described cooling-water temperature transmitter abnormality determination method judges whether described bypass cooling-water temperature transmitter is unusual, and described method comprises: when described bypass coolant temperature is estimated as when being equal to, or greater than predetermined value, use described bypass cooling-water temperature transmitter to detect described bypass coolant temperature; If the increasing amount of detected described bypass coolant temperature is greater than or equal to predetermined value, so described bypass cooling-water temperature transmitter is judged to be normally; And if the described increasing amount of detected described bypass coolant temperature is less than predetermined value, then open described control valve, and after described control valve is opened, use described bypass cooling-water temperature transmitter to detect described bypass coolant temperature again, and before opening based on described control valve and the variable quantity of described bypass coolant temperature afterwards judge whether described bypass cooling-water temperature transmitter unusual.
Engine-cooling system according to third party's case of the present invention comprises: the engine coolant passage; Bypass passageways to the motor bypass; Control valve, it is limited in the liquid circulation between engine coolant passage and the bypass passageways; The bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in the bypass passageways; And cooling-water temperature transmitter abnormality juding portion, if when the bypass coolant temperature is estimated as the increasing amount of checkout value of the bypass coolant temperature that obtains when being equal to, or greater than predetermined value less than predetermined value, then described cooling-water temperature transmitter abnormality juding portion opens described control valve, and judges based on the variable quantity of the checkout value of the bypass coolant temperature that obtains after control valve is opened whether the bypass cooling-water temperature transmitter is unusual.
According to according to the cooling-water temperature transmitter abnormality determination method of alternative plan and according to the engine-cooling system of third party's case, can realize and the essentially identical effect of effect that realizes according to the described cooling-water temperature transmitter abnormity determining device of first scheme.
Description of drawings
Feature, advantage and technology and industrial significance to exemplary embodiment of the present invention describes below with reference to accompanying drawings, and wherein similar reference character is represented similar element, and wherein:
Fig. 1 is the total structure figure of example that the cooling system of the motor of using embodiments of the invention is shown;
Fig. 2 A is the sectional drawing that closes the valve state that is illustrated in the structure of the changing valve that uses in the cooling system shown in Figure 1 and changing valve is shown;
Fig. 2 B is the sectional drawing of opening the valve state that is illustrated in the structure of the changing valve that uses in the cooling system shown in Figure 1 and changing valve is shown;
Fig. 3 A is the figure that is illustrated in the cooling system of motor shown in Figure 1 at the stream of the cooling liquid that circulates in cooling passage during the engine cold state;
Fig. 3 B is the figure that is illustrated in the cooling system of motor shown in Figure 1 at the stream of the cold cooling liquid that circulates in but liquid passage during half warm-up mode of motor;
Fig. 4 is the figure that is illustrated in the stream of the cooling liquid that circulates in the cooling system of motor shown in Figure 1 during the complete warm-up mode of motor in cooling passage;
Fig. 5 is the flow chart that the example that cooling-water temperature transmitter abnormality juding that ECU in an embodiment of the present invention carries out handles is shown; And
Fig. 6 illustrates the sequential chart of the example of cooling-water temperature transmitter abnormality juding processing in an embodiment of the present invention.
Embodiment
Hereinafter, with reference to the accompanying drawings embodiments of the invention are described.
Cooling system (cooling liquid stops cooling system in the motor) with reference to the motor 1 of Fig. 1 describes.
Cooling system of the present invention comprises electric coolant pump 2, radiator 3, thermostat 4, heater 5, exhaust heat recovery apparatus 6, the recirculation of EGR(waste gas) cooler 7, changing valve 10, be used for making liquid circulation arrive cooling passage 200 of these devices etc.
The coolant pump that electric coolant pump 2 can be set by the rotating speed of control motor changeably for its discharge flow rate (head pressure).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, drive electric coolant pump 2 together with the startup of motor 1, and wait to control the discharge flow rate of electric coolant pump 2 according to the running state of motor 1.
Thermostat 4 is according to the expansion of the heat sensitive wax of temperature sensitive portion for example and the valve device that contraction moves, and is designed so that the cooling passage between the radiator 3 and electric coolant pump 2 is closed to prevent cooling liquid inflow radiator 3(engine coolant passage 201 when coolant temperature is hanged down relatively).On the other hand, when the warming-up of motor 1 has been finished, namely, when coolant temperature is high relatively, thermostat 4 moves (opening its valve) according to coolant temperature, to allow a part of inflow radiator 3 of cooling liquid, makes and is discharged into the atmosphere from radiator 3 by the heat of cooling liquid recovery.Incidentally, in this embodiment, thermostat 4 has been set to environment cools liquid temp (approximating the temperature of wax) when temperature sensitive portion and has reached Opening valve temperature (for example, 70 ℃) than the changing valve of describing after a while 10 high coolant temperature (for example, 82 ℃ or higher) time and open.
The heat exchanger that heater 5 heats the compartment of vehicle for the heat of utilizing cooling liquid, and be arranged to ajutage towards air conditioner.Particularly, realized following design: make when the compartment is heated (when heater is connected) in ajutage mobile air-conditioning wind by the heater 5(heater heart) and the warm braw that obtains be fed into the compartment, and make At All Other Times (for example, during cooling) (when heater turn-offs), air-conditioning wind is walked 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 passage 202(bypass passageways) in the temperature of the cooling liquid that flows equate, so calorifier inlets cooling-water temperature transmitter 22 is corresponding to the bypass cooling-water temperature transmitter.
Exhaust heat recovery apparatus 6 is a kind of like this heat exchangers: reclaim the purpose of heat for utilizing cooling liquid from exhaust, this heat exchanger is arranged on the exhaust passage of motor 1.The heat that is reclaimed by exhaust heat recovery apparatus 6 is used for the warming-up of motor and the heating in compartment.Cooler for recycled exhaust gas 7 is a kind of like this heat exchangers: this heat exchanger is arranged in the exhaust that will flow in the exhaust passage of motor 1 a part is back on the EGR passage of gas-entered passageway, passes through the purpose of the EGR gas of (backflow) to reach cooling in the EGR passage.
Next, describe with reference to the changing valve 10 that uses in Fig. 2 A and the cooling system of Fig. 2 B.
In this embodiment, changing valve 10 comprises housing 11, valve body 12, compression disc spring 13 and temperature sensitive 14 etc.
Be provided with valve seat 111 and the spring seat 112 that faces with each other in the inside of housing 11.Space between valve seat 111 and the spring seat 112 (space on the upstream side of valve body 12) 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.
Temperature sensitive (temperature sensitive final controlling element) 14 comprises casing 141 and bar 142.Bar 142 is the rod-shaped member of extending along the switching direction of valve body 12, and is arranged to and can freely slides with respect to casing 141.Bar 142 penetrates valve body 12.Valve body 12 can slide with respect to bar 142 along opening and closing direction.In addition, the distal portion of bar 142 penetrates the wall body 11f(of housing 11 at the wall body of a side opposite with cooling liquid entrance 11a), and this distal portion is kept by bar retaining member 16.
The inside of temperature sensitive 14 casing 141 is filled with heat sensitive wax 143, expands owing to the variation (that is wax variation of temperature) of temperature sensitive 14 environment cools liquid temp (hereinafter being also referred to as changing valve environment cools liquid temp) and contraction.The expansion of heat sensitive wax 143 and contraction have changed the overhang of bar 142 with respect to casing 141.Incidentally, heat sensitive wax 143 is contained in the sealing component of being made by rubber etc. 144.
In the changing valve 10 with aforesaid structure, when changing valve environment cools liquid temp (approximating the wax temperature) Tvw is lower than predetermined value (being 70 ℃ in this embodiment), following state occurs: the amount that bar 142 is given prominence to from casing 141 is little (namely, the amount that bar 142 is absorbed in the casing 141 is big), thereby being positioned at valve body 12, the elastic force by compression disc spring 13 (that is, closes) (Fig. 2 A) on the valve seat 111.When this closes the described changing valve environment cools of valve state liquid temp Tvw and becomes and equal or when being higher than predetermined value (equal or be higher than 70 ℃), temperature sensitive 14 heat sensitive wax 143 expands certainly.Because the expansion of heat sensitive wax 143, bar 142 increases from casing 141 outstanding amounts, and whole temperature sensitive 14, namely valve body 12, move along the direction away from valve seat 111, overcome the elastic force of compression disc spring 13, make valve body 12 separate (opening) (Fig. 2 B) with valve seat 111.
Therefore, when changing valve environment cools liquid temp Tvw is lower than predetermined value (70 ℃), changing valve 10 is closed condition in this embodiment, wherein motor 1(engine coolant passage 201 shown in Figure 1) cooling liquid outlet 1b and heater passage 202 shown in Figure 1 covered (liquid circulation between engine coolant passage and the bypass passageways is restricted) each other.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 ℃), changing valve 10 is out the valve state, and wherein motor 1(engine coolant passage 201) cooling liquid outlet 1b and heater passage 202 shown in Figure 1 communicate with each other.Incidentally, when thermostat shown in Figure 14 is in when closing the valve state, although cooling liquid entrance 11a and radiator connection opening 11b communicate with each other, the cooling liquid that has flowed into cooling liquid entrance 11a can inflow radiator connection opening 11b.
It should be noted that herein electric heater 15 is embedded in temperature sensitive 14 in the changing valve 10 in this embodiment.By being electric heater 15 energising so that the heat fusing heat sensitive wax 143 that is produced by electric heater 15 can be forced changing valve 10 in opened condition.The opening of changing valve 10 that causes owing to the heater energising is execution such as (when judging about normal second of calorifier inlets coolant temperature 22) during the cooling-water temperature transmitter abnormality juding of describing is after a while handled.Incidentally, operate the electric heater 15 of changing valve 10 by changing valve controller (not shown).The changing valve controller is according to the energising of the electric heater 15 of carrying out changing valve 10 from the valve request of opening of ECU300.
With reference to Fig. 3 and Fig. 4 the mobile of cooling liquid of the cooling passage of the cooling system that cycles through motor shown in Figure 11 described.
At first, during the cold machine state of motor, because temperature sensitive 14 the environment cools liquid temp Tvw low (less than 70 ℃) of changing valve 10, so changing valve 10 is closed condition so that in the motor 1 cooling liquid of (in the coolant jacket) pass through to be stopped (cooling liquid stops in the motor).Since this point, motor 1 rapid warming-up.In addition, when changing valve 10 is in closed condition, because the operation of electric coolant pump 2, liquid circulation is passed through heater passage 202 as shown in Figure 3A, and cooling liquid is mobile by the order 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 heating request during aforesaid rapid warming-up, then the heat that is reclaimed by exhaust heat recovery apparatus 6 is enough to remedy the required heat of heater 5.
Next, become and equal or when being higher than predetermined value (equal or be higher than 70 ℃), changing valve 10 is opened as become temperature sensitive 14 environment cools liquid temp Tvw of half warming-up and changing valve 10 of motor 1.When changing valve 10 is opened, the liquid circulation in heater passage 202, cooling liquid also flows by the order of " cooling liquid outlet 1b → changing valve 10 → heater connecting passage 202a of the inside of the cooling liquid entrance 1a → motor 1 of electric coolant pump 2 → motor 1 (in the coolant jacket) → motor 1 ", shown in Fig. 3 B, so that motor 1 cooling.In addition, when changing valve 10 in opened condition the time, the cooling liquid in the engine coolant passage 201 in the cooling liquid of (in the motor 1) and the heater passage (bypass passageways) 202 is mixed.
Then, when motor 1 reached complete warm-up mode, thermostat 4 moves (opening its valve) so that a part of inflow radiator 3 of cooling liquid as shown in Figure 4, is therefore discharged into the atmosphere from radiator 3 by the heat of cooling liquid recovery.
Next, will describe ECU300.ECU300 comprises CPU, ROM, RAM, standby RAM etc.ROM stores the setting table of various control programs, reference when various control programs are carried out etc.CPU shows to carry out computing based on the various control programs and the setting that are stored among the ROM.In addition, RAM is for the result of calculation that is used for temporary transient storage CPU, from the storage of the data of various sensors inputs etc.Standby RAM is the nonvolatile memory that needs the data etc. of storage for storage when motor 1 stops.
ECU300 is connected to the various sensors of the running state that detects 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 also is connected to calorifier inlets cooling-water temperature transmitter 22, ignition switch (not shown) etc.
ECU300 is based on the various controls of carrying out motor 1 from the various signal of sensor of the running state that detects motor, comprises the aperture control, fuel injection amount control (the opening/closing control of sparger) of the throttle valve of motor 1 etc.In addition, ECU300 also carries out " processing of cooling-water temperature transmitter abnormality juding " described below.
(example 1 of determination processing)
The example of the abnormality juding that is used for calorifier inlets cooling-water temperature transmitter 22 being handled with reference to flow chart shown in Figure 5 describes.ECU300 carries out processing routine shown in Figure 5.
Time point (IG-ON) when processing routine shown in Figure 5 starts from the ignition switch connection.When processing routine shown in Figure 5 began, ECU300 at first picked up the calorifier inlets coolant temperature thw2 that exists when engine start from the output signal of calorifier inlets cooling-water temperature transmitter 22 in step ST101.Next, in step ST102, ECU300 read in for the abnormality juding value α of the determination processing of the step ST105 that describes after a while and step ST110 (℃).This abnormality juding value α can be steady state value (for example, α=5 ℃), and the coolant temperature that perhaps can also be with reference to setting table etc. exists during according to engine start is set changeably.Incidentally, abnormality juding value α (steady state value) or the setting table that be used for to calculate abnormality juding value α are stored in the ROM of ECU300.
In step ST103, ECU300 calculates the integral value (∑ ga) of air inflow when motor starts 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 (being) when result of determination is the certainty judgement, ECU300 are judged to be to satisfy judges precondition, proceeds to step ST105 then.
Incidentally, about specified value β [g], by experiment, simulation etc., obtain the integral value (∑ ga) of air inflow in advance, and be fit to specified value β [g] based on the result who obtains, then specified value β [g] is stored among the ROM of ECU300, the integral value of described air inflow be when in following process, making from engine start by calorifier inlets cooling-water temperature transmitter 22(under the normal state) variable quantity (deviation) of the detection coolant temperature value that provides becomes, and to be equal to, or greater than predetermined value (α=5[℃ of abnormality juding value] or bigger) needed: described process, the coolant temperature in heater passage 202 is because by exhaust heat recovery apparatus 6, cooler for recycled exhaust gas 7 grades are delivered to the heat of the cooling liquid of circulation heater passage 202 and raise from the heat of exhaust.
In step ST105, the output signal of the calorifier inlets cooling-water temperature transmitter 22 that ECU300 obtains when being equal to, or greater than specified value β [g] based on becoming when air inflow integral value (∑ ga) is calculated calorifier inlets coolant temperature thw2(checkout value) deviation (, itself and the deviation (thw2 deviation) of the detection calorifier inlets coolant temperature value that when engine start, obtains), and judge then the thw2 deviation whether be greater than or equal to the abnormality juding value α that in step ST102, reads in [℃] (will carry out first normally judges).If the result who judges judges that for certainty (being) is (if the thw2 deviation 〉=α), then ECU300 judges calorifier inlets cooling-water temperature transmitter 22 normal (step ST111).If being negativity, the result of determination among the step ST105 judges that (denying) is (if the thw2 deviation＜α), then ECU300 proceeds to step ST106.
It should be noted herein, if the result of determination among the step ST105 is negativity judges (denying), then ECU300 can not determine the situation that whether there is " calorifier inlets cooling-water temperature transmitter 22 is unusual " 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 to open, carries out about second of calorifier inlets cooling-water temperature transmitter 22 and normally judge, as described later.
In step ST106, ECU300 outputs to the energising that the changing valve controller begins the electric heater 15 of changing valve 10 by opening the valve request.Incidentally, ECU300 counts lighting elapsed time from the time that begins to switch on of the electric heater 15 of changing valve 10.
Next in step ST107, whether ECU300 judges " changing valve does not have the status fault of cutting out ".Judge (being) if result of determination is certainty, then ECU300 proceeds to step ST108.Judge (denying) if the result of determination among the step ST107 is negativity, then ECU300 does not carry out the normal or unusual judgement (step ST113 wherein skips judgement) about calorifier inlets cooling-water temperature transmitter 22.Incidentally, term " closed condition fault " refers to herein that valve is in closed condition and the fault that can not open.
To the example of the determination processing of step ST107 be specifically described.Have at changing valve 10 under the situation of closed condition fault, even heater 15 is energized, it is static that the cooling liquid in the motor 1 also keeps, and therefore big by the increasing amount of engine coolant temperature sensor 21 detected engine coolant temperature thw1.On the other hand, increasing amount under changing valve 10 normal situations (situation of cryogenic liquid inflow engine 1), engine coolant temperature thw1(checkout value) relatively little (perhaps detecting coolant temperature value thw1 descends).Utilize this point, if after heater 15 is energized by the increasing amount of engine coolant temperature sensor 21 detected engine coolant temperature thw1 less than predetermined value, then ECU300 is judged to be " changing valve does not have the status fault of cutting out ", and proceeds to step ST108.Incidentally, obtaining engine coolant temperature sensor 21 at needs is under the normal situation about judging, ECU300 is calculation engine coolant temperature thw1(checkout value for example) and intake temperature tha(checkout value) between poor [thw1-tha], and judge temperature difference [thw1-tha] whether in prespecified range (for example,-20 ℃≤thw1-tha≤20 ℃), and if result of determination is that (being) judged in certainty then to be judged to be engine coolant temperature sensor 21 normal.
Incidentally, be equipped with at changing valve 10 under the situation of the sensor that detects the valve lifting capacity, can judge the existence of " the closed condition fault of changing valve " or do not exist based on the checkout value that promotes sensor by valve and provide.
In step ST108, whether ECU300 judges after the time point that the energising at the electric heater 15 of changing valve 10 begins the supercooling liquid hybrid standard time.The amount of time that begins to the actual amount of time of opening of changing valve 10 and when the cooling liquid that is opened to (in the motor 1) the engine coolant passage 201 of changing valve 10 and the cooling liquid in the heater passage 202 are fully mixed (when the temperature of the cooling liquid in the heater passage 202 fully raises) based on the energising from electric heater 15 is fit to " the cooling liquid hybrid standard time " of using in the processing of step ST108.
Particularly, (for example when opening, changing valve 10 needs the condition of maximum duration when beginning to switch on based on the electric heater 15 from changing valve 10, carrying out the condition that free-runing operation and motor are in low temperature environment), by experiment, simulation waits to be fit to open required time (time 1) (see figure 6) of changing valve 10.In addition, fully mix the required time (time 2) (see figure 6) about the cooling liquid in the cooling liquid of (in the motor 1) in the engine coolant passage 201 and the heater passage 202, the flow of the cooling liquid in time 2 and the motor 1 that takes place changing valve 10 is opened after is inversely proportional to, and so considers this point waiting to be fit to 2 o'clock time based on experiment, simulation.By " the opening the required time of valve (time 1) " that is fit to and " value [the time 1+ time 2] " that obtains of suing for peace suitable " mixing the required time (time 2) of cooling liquid " are set to " the cooling liquid hybrid standard time " of using in the determination processing of step ST107.
Then, elapsed time reaches the time point (time point when result of determination in step ST108 be certainty judgement (be)) of above-mentioned cooling liquid hybrid standard during the time after the energising of electric heater 15 begins, ECU300 interrupts conversion and opens the valve request, and stop the energising (step ST109) of the electric heater 15 of changing valve 10, proceed to step ST110 then.
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 the deviation (thw2 deviation) of the detection calorifier inlets coolant temperature value that (when engine start) obtains when changing valve is opened), judge then the thw2 deviation whether be greater than or equal to the abnormality juding value α that in step ST102, reads in [℃] (the second normally judgement).If being certainty, result of determination judges that (being) is (if the thw2 deviation 〉=α), then ECU300 judges calorifier inlets cooling-water temperature transmitter 22 normal (step ST111).If being negativity, the result of determination among the step ST110 judges that (denying) is (if the thw2 deviation＜α), then ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 has card and stops (step ST112) unusually.
Next, with reference to Fig. 6 the concrete example of handling about the abnormality juding of calorifier inlets cooling-water temperature transmitter 22 is described.Incidentally, Fig. 6 shows normal and because the fault of exhaust heat recovery apparatus 6 and cooler for recycled exhaust gas 7 causes bypass passageways not have under the situation of available thermal source at calorifier inlets cooling-water temperature transmitter 22, calorifier inlets coolant temperature thw2(checkout value) the example of variation.
At first, at the calorifier inlets coolant temperature thw2(checkout value that (first normally judges) obtains when being greater than or equal to specified value β [g] that becomes when the air inflow integral value (∑ ga) from engine start) deviation be greater than or equal to abnormality juding value α [℃] situation under, ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 is normal.On the other hand, at the calorifier inlets coolant temperature thw2(checkout value that (first normally judges) obtains when being greater than or equal to specified value β [g] that becomes when air inflow integral value (∑ ga)) deviation less than abnormality juding value α [℃] situation (ECU300 can not determine the situation of the situation of the situation that has " calorifier inlets cooling-water temperature transmitter 22 is unusual " or " exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 break down ") under, ECU300 begins the energising of the electric heater 15 of changing valve 10, as shown in Figure 6.
At changing valve 10 because the energising of electric heater and after actual the opening, from the high temperature coolant of motor 1 flow into heater passage 202 and therefore the coolant temperature in the heater passage 202 raise, even exhaust heat recovery apparatus 6 and/or cooler for recycled exhaust gas 7 break down.Then, during the well-mixed state of cooling liquid in reaching engine coolant passage 201 in the cooling liquid of (in the motor 1) and the heater passage 202, it is fully high that the temperature of the cooling liquid in the heater passage 202 becomes.At this moment, if calorifier inlets cooling-water temperature transmitter 22 is normal, then by these cooling-water temperature transmitter 22 detected calorifier inlets coolant temperature thw2(checkout values) the variation quantitative change big, make the deviation of calorifier inlets coolant temperature thw2 become to be equal to, or greater than abnormality juding value α [℃] (Fig. 6).On the other hand, have under the situation that card stops unusually (the checkout value card is parked in the unusual of low coolant temperature value) at calorifier inlets cooling-water temperature transmitter 22, coolant temperature entrance coolant temperature thw2(checkout value) do not raise, but in fact the temperature of the cooling liquid in the heater passage 202 raises, make the deviation of calorifier inlets coolant temperature thw2 can not become to be equal to, or greater than abnormality juding value α [℃].
In view of these the point, in this example, (for example be greater than or equal to abnormality juding value α by the deviation of calorifier inlets cooling-water temperature transmitter 22 detected calorifier inlets coolant temperature thw2 (deviation of the detection calorifier inlets coolant temperature value that it obtains with when changing valve is opened (when engine start time)) becoming when the cooling liquid of (in the motor 1) in the engine coolant passage 201 and the cooling liquid in the heater passage 202 when fully mixing, α=5[℃]) situation (namely, the situation of thwe deviation 〉=α) under, ECU300 judges that calorifier inlets cooling-water temperature transmitter 22 is normal.Under the situation of deviation less than abnormality juding value α of calorifier inlets coolant temperature thw2, ECU300 is judged to be calorifier inlets cooling-water temperature transmitter 22 to have card and stops unusually.
As mentioned above; in the abnormality juding of this example is handled; determining by normally determining about first of calorifier inlets cooling-water temperature transmitter 22 under calorifier inlets cooling-water temperature transmitter 22 abnormal situations (calorifier inlets cooling-water temperature transmitter 22 unusually or exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 situation about breaking down); changing valve 10 is opened so that from the high temperature coolant of motor 1 flow in the heater passage 202 and therefore the temperature of the cooling liquid in the heater passage 202 raise.During the state that this coolant temperature raises, normally judge based on being carried out by the thw2 deviation (variable quantity) of calorifier inlets cooling-water temperature transmitter 22 detected bypass coolant temperatures about second of calorifier inlets cooling-water temperature transmitter 22.Therefore, even when causing bypass passageways not have available thermal source when breaking down owing to exhaust heat recovery apparatus 6 or cooler for recycled exhaust gas 7 etc., also can accurately determine calorifier inlets cooling-water temperature transmitter 22(bypass cooling-water temperature transmitter) unusual existence or do not exist, and can not do the judgement that makes mistake.
Incidentally, although in above-mentioned example, the time point (IG-ON) that processing routine shown in Figure 5 starts from ignition switch when connecting also can begin processing routine shown in Figure 5 when having the engine start request under the vehicle that motor 1 is housed is the situation of motor vehicle driven by mixed power.
(example 2 of determination processing).
Although in the example 1 of determination processing, determine after the energising of the electric heater 15 of changing valve 10 begins and opened through the time point changing valve 10 of certain hour when (time 1), also tolerable is estimated temperature sensitive 14 environment cools liquid temp Tvw of changing valve 10, and judges based on the estimated value of changing valve environment cools liquid temp Tvw whether changing valve 10 is opened.
Particularly, utilize by engine coolant temperature sensor 21 detected engine coolant temperature thw1, 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 the Opening valve temperature (70 ℃) of changing valve 10, ECU300 is judged to be " changing valve 10 has been opened ".Then, after determining the time point of valve 10 when having opened, afterwards, carry out the normal judgement (determination processing of the step ST110 in the execution graph 5) about calorifier inlets cooling-water temperature transmitter 22 through above-mentioned set time (time 2) (coolant temperature in the heater passage 202 fully raise before required time).
Therefore, opening in the processing of valve condition judgement of this example, owing to determine the existence of the open mode of changing valve 10 based on the estimated value of changing valve environment cools liquid temp Tvw, so, opening the valve condition judgement with the example 1 of determination processing above-mentioned handles and compares, namely, compare with the situation of the existence of the open mode that determines changing valve 10 based on elapsed time after electric heater 15 energising beginning, can implement at short notice normally to judge about second of calorifier inlets cooling-water temperature transmitter 22.
That is to say, in the example 1 of determination processing, make the mistake that changing valve 10 opened judges in order to prevent when changing valve 10 is not opened in fact as yet, be fit to the cooling liquid hybrid standard time based on the condition (for example, the race of engine and motor are in the condition of low temperature environment) that needs maximum duration before opening at changing valve 10.Yet, being fit to for this, nargin is very big, therefore certainly exists the long time before the second normal judgement of carrying out about calorifier inlets cooling-water temperature transmitter 22.Yet, make and when the estimated value of changing valve environment cools liquid temp (approximating the wax temperature) Tvw reaches Opening valve temperature (70 ℃), to determine the design that changing valve 10 has been opened by adopting, become and to open to judge that according to changing valve 10 actual changing valve 10 opened.This has eliminated the needs that above-mentioned nargin is provided, and makes it possible to shorten normal judgement (the second normally judges) time before about calorifier inlets cooling-water temperature transmitter 22.
Incidentally, although be used for estimation changing valve environment cools liquid temp Tvw by engine coolant temperature sensor 21 detected detection coolant temperature values in above-mentioned example, the estimated value of engine coolant temperature thw1 also can be used for estimating changing valve environment cools liquid temp Tvw.Hereinafter will the example of estimation be described.
At first, the engine speed Ne that calculates based on the output signal according to the engine rotation speed sensor (not shown) of ECU300 and load-factor k1 with reference to by experiment, the setting that is fit in advance such as simulation shows the cooling loss Qw in the calculation engine 1.Incidentally, load-factor k1 can be calculated as for example expression when the value of the ratio of preload and maximum engine load by reference setting table etc. based on engine speed Ne and suction pressure.
Next, utilize the cooling loss Qw calculate, ECU300 is based on following expression (1), that is, the Laplace transform representation of engine coolant temperature thw1 comes the estimated value of calculation engine coolant temperature thw1.In addition, utilize the estimated value of the engine coolant temperature thw1 that calculates, ECU300 calculates the estimated value of changing valve environment cools liquid temp Tvw according to following expression (2).
C: thermal capacity [J/ ℃]
λ: the heat conductivity between the focus [W/ (m ℃)]
L: the distance between the focus [m]
A: the heat-conducting area [m between the focus
2]
α and β: constant
Herein, parameters C, λ, L and the A in the above-mentioned representation (1) is set to the value that is fit under the hypothesis of the cooling liquid quality around the highest temperature part in the coolant jacket of the cooling liquid stopping period cylinder head in motor 1.
In addition, can also calculate the estimated value of changing valve environment cools liquid temp Tvw by other technology.For example, can adopt following computing technique.That is to say, utilize engine speed Ne and load-factor k1 as parameter, by experiment, simulation waits to obtain the coolant temperature at the cooling liquid outlet 1b place of motor 1.Based on the result who obtains, in advance by experiment, simulation waits to be fit to and the estimated value of mapping changing valve environment cools liquid temp Tvw.Then, come to calculate the estimated value of changing valve environment cools liquid temp Tvw with reference to setting table by engine speed Ne and actual load-factor k1 based on reality.
Although in above-described embodiment and example, the changing valve 10 of the temperature sensitive portion that makes the valve body displacement is housed as the control valve of the liquid circulation between control engine coolant passage and the heater passage (bypass passageways), but the invention is not restricted to this, just, also tolerable uses the control valve that opens and closes by dissimilar final controlling element (for example, solenoid etc.).
Although in above-described embodiment and example, electric coolant pump is used for the circulation of cooling liquid, the invention is not restricted to this, just, goes back tolerable and uses mechanical coolant pump to be used 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 are merged into heat exchanger, but the present invention also can be applicable to except exhaust heat recovery apparatus and cooler for recycled exhaust gas, also merges the automatic fluid transmission such as ATF() cooling system of heat exchanger such as heater, ATF cooler.
The present invention can be used in unusual existence or the non-existent cooling-water temperature transmitter abnormity determining device of the cooling-water temperature transmitter of the coolant temperature of judging the heater system in the cooling system that detects motor (internal-combustion engine).
Claims (7)
1. cooling-water temperature transmitter abnormity determining device that is applied to engine-cooling system, described engine-cooling system comprises: the engine coolant passage; Motor is carried out the bypass passageways of bypass; Control valve, it limits the liquid circulation between described engine coolant passage and the described bypass passageways; And bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in the described bypass passageways, and described cooling-water temperature transmitter abnormity determining device judges whether described bypass cooling-water temperature transmitter is unusual, and described cooling-water temperature transmitter abnormity determining device is characterised in that and comprises
Decision device, if when described bypass coolant temperature is estimated as the increasing amount of checkout value of the described bypass coolant temperature that obtains when being equal to, or greater than predetermined value less than described predetermined value, so described decision device is opened described control valve, and judges that based on the variable quantity of the described checkout value of the described bypass coolant temperature that obtains after described control valve is opened described bypass cooling-water temperature transmitter is unusual.
2. cooling-water temperature transmitter abnormity determining device according to claim 1, wherein:
If after described control valve 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 predetermined value, and so described decision device is judged to be described bypass cooling-water temperature transmitter normally; And
If after described control valve is opened, the described increasing amount of the described checkout value of described bypass coolant temperature is less than described predetermined value, and so described decision device is judged to be described bypass cooling-water temperature transmitter unusually.
3. cooling-water temperature transmitter abnormity determining device according to claim 1 and 2, wherein, described bypass passageways is provided with at least one in exhaust heat recovery apparatus and the cooler for recycled exhaust gas.
4. according to each described cooling-water temperature transmitter abnormity determining device in the claim 1 to 3, wherein:
Described control valve is temperature sensitive operation valve, and it has the temperature sensitive portion that makes the valve body displacement; And
Described cooling-water temperature transmitter abnormity determining device comprises out valve condition judgement device, when the estimated value of the environment cools liquid temp of described control valve becomes when being equal to, or greater than the Opening valve temperature of described control valve, the described valve condition judgement device of opening judges that described control valve opens.
5. according to each described cooling-water temperature transmitter abnormity determining device in the claim 1 to 4, wherein, after described control valve is opened through the scheduled time after, described decision device is carried out the judgement about described bypass cooling-water temperature transmitter.
6. cooling-water temperature transmitter abnormality determination method that in engine-cooling system, uses, described engine-cooling system comprises: the engine coolant passage; Motor is carried out the bypass passageways of bypass; Control valve, it limits the liquid circulation between described engine coolant passage and the described bypass passageways; And bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in the described bypass passageways, and described cooling-water temperature transmitter abnormality determination method judges whether described bypass cooling-water temperature transmitter is unusual, and described cooling-water temperature transmitter abnormality determination method is characterised in that and comprises:
When described bypass coolant temperature is estimated as when being equal to, or greater than predetermined value, use described bypass cooling-water temperature transmitter to detect described bypass coolant temperature,
If the increasing amount of detected described bypass coolant temperature is greater than or equal to described predetermined value, so described bypass cooling-water temperature transmitter is judged to be normally; And
If the described increasing amount of detected described bypass coolant temperature is less than described predetermined value, then open described control valve, and after described control valve is opened, use described bypass cooling-water temperature transmitter to detect described bypass coolant temperature again, and before opening based on described control valve and the variable quantity of described bypass coolant temperature afterwards judge whether described bypass cooling-water temperature transmitter unusual.
7. engine-cooling system is characterized in that comprising:
The engine coolant passage;
Motor is carried out the bypass passageways of bypass;
Control valve, it is limited in the liquid circulation between described engine coolant passage and the described bypass passageways;
The bypass cooling-water temperature transmitter, it detects the bypass coolant temperature in the described bypass passageways; And
Cooling-water temperature transmitter abnormality juding portion, if when described bypass coolant temperature is estimated as the increasing amount of checkout value of the described bypass coolant temperature that obtains when being equal to, or greater than predetermined value less than described predetermined value, then described cooling-water temperature transmitter abnormality juding portion opens described control valve, and judges based on the variable quantity of the described checkout value of the described bypass coolant temperature that obtains after described control valve is opened whether described bypass cooling-water temperature transmitter is unusual.
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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 true CN103189611A (en) | 2013-07-03 |
| CN103189611B CN103189611B (en) | 2015-07-22 |
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| CN201180053201.2A Expired - Fee Related CN103189611B (en) | 2010-11-11 | 2011-11-08 | Abnormality determination apparatus and abnormality determination method for coolant temperature sensor, and engine cooling system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20130213600A1 (en) |
| EP (1) | EP2638264B1 (en) |
| JP (1) | JP5218526B2 (en) |
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| WO (1) | WO2012063114A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103189611B (en) | 2015-07-22 |
| EP2638264A1 (en) | 2013-09-18 |
| EP2638264B1 (en) | 2016-12-21 |
| WO2012063114A1 (en) | 2012-05-18 |
| US20130213600A1 (en) | 2013-08-22 |
| JP2012102688A (en) | 2012-05-31 |
| JP5218526B2 (en) | 2013-06-26 |
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