CN104827853A - Vehicle outdoor environment temperature correction method and device - Google Patents
Vehicle outdoor environment temperature correction method and device Download PDFInfo
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- CN104827853A CN104827853A CN201410806611.5A CN201410806611A CN104827853A CN 104827853 A CN104827853 A CN 104827853A CN 201410806611 A CN201410806611 A CN 201410806611A CN 104827853 A CN104827853 A CN 104827853A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/0073—Control systems or circuits characterised by particular algorithms or computational models, e.g. fuzzy logic or dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
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Abstract
The invention discloses a vehicle outdoor environment temperature correction method and device. The vehicle outdoor environment temperature correction method includes the following steps of: obtaining a first cooling liquid temperature value; obtaining a first outdoor environment temperature correction value, wherein the first outdoor environment temperature correction value is an outdoor environment temperature correction value at the last flameout of a vehicle; obtaining a first parking time duration threshold value and a second parking time duration threshold value according to the first cooling liquid temperature value and the first outdoor environment temperature correction value; reading a current sampling value of a temperature sensor; obtaining the parking time duration of the vehicle; judging whether the parking time duration is between the first parking time duration threshold value and the second parking time duration threshold value; and obtaining a current outdoor environment temperature correction value according to the first outdoor environment temperature correction value, the current sampling value and an engine heat effect value if the parking time duration is between the first parking time duration threshold value and the second parking time duration threshold value. With the vehicle outdoor environment temperature correction method and device of the invention adopted, the problem of poor accuracy when a temperature sensor is utilized to obtain the outdoor environment temperature of a vehicle can be solved.
Description
Technical field
The present invention relates to field of automobile air conditioner, in particular to a kind of car load outdoor environment temperature modification method and device.
Background technology
Current Urban Traffic Jam Based becomes increasingly conspicuous; car load often there will be the operating mode of idling or of short duration parking in city travels; residing outdoor temp angle value is had in car to the equipment of collection demand, need to utilize outdoor temperature sensor to gather outdoor environment temperature, using as thermoregulator foundation.Such as, automatic air condition, needs to utilize outdoor temperature sensor to gather outdoor environment temperature, using as air conditioner refrigerating or the basis for estimation that heats.
Usually, the inductive probe of outdoor temperature sensor is thermally dependent resistor, and along with the change of temperature, resistance of sensor also changes, thus temperature signal is converted into electric signal sends to air-conditioner controller, and then the indoor temperature of air-conditioner controller to car load regulates.
The installation site of outdoor temperature sensor is located at the upwind position of cabin before car usually, therefore, when car load idling or driving engine of short duration flame-out time, the numerical value that outdoor temperature sensor collects affects larger by engine radiation, the numerical value that collects and actual value is caused to occur deviation, current real-world temperature can not be represented, thus affect the control accuracy of relevant device in car load.
The problem of the car load outdoor environment temperature poor accuracy obtained for utilizing temperature sensor in correlation technique, not yet proposes actv. solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of car load outdoor environment temperature modification method and device, to solve the problem of the car load outdoor environment temperature poor accuracy utilizing temperature sensor to obtain.
To achieve these goals, according to an aspect of the present invention, a kind of car load outdoor environment temperature modification method is provided.
Car load outdoor environment temperature modification method according to the present invention comprises: obtain the first cooling-liquid temperature value, wherein, and engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load; Obtain the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load; The first stay time threshold value and the second stay time threshold value of car load is obtained according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value is for representing that the car load rear engine waste heat that stops working affects the maximum duration of temperature sensor, and the second stay time threshold value is for representing engine exhaust heat not yet to the maximum duration that temperature sensor has an impact; The current sample values of reading temperature sensor; Obtain the parking duration of car load; Judge parking duration whether between the first stay time threshold value and the second stay time threshold value; If parking duration is between the first stay time threshold value and the second stay time threshold value, then obtain current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value.
Further, after judging that parking duration is whether between the first stay time threshold value and the second stay time threshold value, the method also comprises: if parking duration is less than the second stay time threshold value, then determine that the first outdoor environment temperature correction is current outdoor ambient temperature correction; If parking duration is greater than the first stay time threshold value, then determine that current sample values is current outdoor ambient temperature correction.
Further, obtain current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value to comprise: obtain weight coefficient according to current sample values and engine thermal influence value; Current outdoor ambient temperature correction is obtained according to weight coefficient and the first outdoor environment temperature correction.
Further, after obtaining current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value, the method also comprises: the current vehicle speed obtaining car load; Obtain the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that the second outdoor environment temperature correction once obtains before being; Judge whether current vehicle speed exceedes preset vehicle speed threshold value; If current vehicle speed exceedes preset vehicle speed threshold value, then obtain current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction.
Further, after obtaining current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction, the method also comprises: judge whether current sample values is less than current outdoor ambient temperature correction; If judge that current sample values is less than current outdoor ambient temperature correction, then using current sample values as current outdoor ambient temperature correction.
Further, before acquisition first cooling-liquid temperature value, the method also comprises: detect car load and whether in operational process, occur flame-out phenomenon; If detect that flame-out phenomenon appears in car load in operational process, then engine coolant temperature and outdoor environment temperature correction when the flame-out phenomenon of record occurs.
To achieve these goals, according to a further aspect in the invention, a kind of car load outdoor environment temperature correcting device is provided.
Car load outdoor environment temperature correcting device according to the present invention comprises: the first acquiring unit, for obtaining the first cooling-liquid temperature value, wherein, and engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load; Second acquisition unit, for obtaining the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load; 3rd acquiring unit, for obtaining the first stay time threshold value and the second stay time threshold value of car load according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value affects the maximum duration of temperature sensor for the waste heat of the driving engine representing car load, and the second stay time threshold value is for representing that the waste heat of driving engine is not yet to the maximum duration that temperature sensor has an impact; Reading unit, for the current sample values of reading temperature sensor; 4th acquiring unit, for obtaining the parking duration of car load; First judging unit, for judging that the parking duration of car load is whether between the first stay time threshold value and the second stay time threshold value; 5th acquiring unit, for when the parking duration of car load is between the first stay time threshold value and the second stay time threshold value, obtains current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value.
Further, this device also comprises: the first determining unit, for when the parking duration of car load is less than the second stay time threshold value, determines that the first outdoor environment temperature correction is current outdoor ambient temperature correction; Second determining unit, for when the parking duration of car load is greater than the first stay time threshold value, determines that current sample values is current outdoor ambient temperature correction.
Further, the 5th acquiring unit comprises: the first acquisition module, for obtaining weight coefficient according to current sample values and engine thermal influence value; Second acquisition module, for obtaining current outdoor ambient temperature correction according to weight coefficient and the first outdoor environment temperature correction.
Further, this device also comprises: the 6th acquiring unit, for obtaining the current vehicle speed of car load; 7th acquiring unit, for obtaining the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that the second outdoor environment temperature correction once obtains before being; Second judging unit, for judging whether current vehicle speed exceedes preset vehicle speed threshold value; 8th acquiring unit, during for exceeding preset vehicle speed threshold value in current vehicle speed, obtains current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction.
By the present invention, adopt the method that comprises the following steps: obtain the first cooling-liquid temperature value, wherein, engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load, obtain the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load, the first stay time threshold value and the second stay time threshold value of car load is obtained according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value is for representing that the car load rear engine waste heat that stops working affects the maximum duration of temperature sensor, and the second stay time threshold value is for representing engine exhaust heat not yet to the maximum duration that temperature sensor has an impact, the current sample values of reading temperature sensor, obtain the parking duration of car load, judge parking duration whether between the first stay time threshold value and the second stay time threshold value, if parking duration is between the first stay time threshold value and the second stay time threshold value, then according to the first outdoor environment temperature correction, current sample values and engine thermal influence value obtain current outdoor ambient temperature correction, solve the problem of the car load outdoor environment temperature poor accuracy utilizing temperature sensor to obtain, and then by when parking duration is between the first stay time threshold value and the second stay time threshold value, according to the first outdoor environment temperature correction, current sample values and engine thermal influence value obtain current outdoor ambient temperature correction, reach the effect improving the accuracy obtaining outdoor environment temperature value.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the diagram of circuit of the first embodiment according to car load outdoor environment temperature modification method of the present invention;
Fig. 2 is the diagram of circuit of the second embodiment according to car load outdoor environment temperature modification method of the present invention; And
Fig. 3 is the schematic diagram of the embodiment according to car load outdoor environment temperature correcting device of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the embodiment of the application's part, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
It should be noted that, term " first ", " second " etc. in the specification sheets of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that the embodiment of the application described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to embodiments of the invention, provide a kind of car load outdoor environment temperature modification method.
Fig. 1 is the diagram of circuit of the first embodiment according to car load outdoor environment temperature modification method of the present invention.As shown in Figure 1, the method comprising the steps of S102 is to step S114:
Step S102, obtains the first cooling-liquid temperature value, wherein, and engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load.
Under normal circumstances, because outdoor temperature sensor is arranged on the upwind position of car cabin before car, therefore after car load stops traveling, the waste heat of engine may impact temperature sensor.Such as, in the certain hour of car load stagnation of movement, the temperature value that the thermal radiation of driving engine can cause temperature sensor to show is higher than real outdoor environment temperature value.Therefore, need engine exhaust heat to revise the impact that temperature sensor causes, to make the final temperature value obtained more close to real outdoor environment temperature value.In this makeover process, introduce the first cooling-liquid temperature value, engine coolant temperature when namely once stopping working before car load.This value is a factor relevant to engine exhaust heat, studies the relation between itself and temperature sensor sampling value, and namely reflecting engine exhaust heat affects situation to temperature sensor sampling value.
Before acquisition first cooling-liquid temperature value, the method can also carry out following steps: detect car load and whether in operational process, occur flame-out phenomenon; If detect that flame-out phenomenon appears in car load in operational process, then engine coolant temperature and outdoor environment temperature correction when the flame-out phenomenon of record occurs.When calculating current outdoor ambient temperature correction, the engine coolant temperature recorded when can directly utilize flame-out phenomenon to occur and outdoor environment temperature correction.
Step S104, obtains the first outdoor environment temperature correction, wherein, and outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load.
Reference value when outdoor environment temperature correction is also the correction of current outdoor ambient temperature when once stopping working before car load.Current outdoor ambient temperature correction be front once flame-out time outdoor environment temperature correction basis on, consider the size (engine exhaust heat is on the impact of temperature sensor) of parking duration, thus to the result that sensor sample value is revised.
Step S106, the first stay time threshold value and the second stay time threshold value of car load is obtained according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value is for representing that the car load rear engine waste heat that stops working affects the maximum duration of temperature sensor, and the second stay time threshold value is for representing engine exhaust heat not yet to the maximum duration that temperature sensor has an impact.
First stay time threshold value and the second stay time threshold value carry out contrast reference value to car load parking duration.After car load parking duration is more than the first stay time threshold value, the car load rear engine waste heat that stops working disappears on the impact of temperature sensor.When car load parking duration has not exceeded the second stay time threshold value, can think that engine exhaust heat not yet impacts temperature sensor.
First stay time threshold value and the second stay time threshold value can be empirical data, or are obtained by verification experimental verification.Certainly, any one obtains the method for the first stay time threshold value and the second stay time threshold value, all within protection scope of the present invention.
Step S108, the current sample values of reading temperature sensor.
The sampled value obtaining temperature sensor can the display data of direct reading temperature sensor.
Step S110, obtains the parking duration of car load.
The parking duration of car load refers to the time span that car load experiences to current time from flame-out.By time set, the parking duration of car load can be obtained.
Step S112, judges parking duration whether between the first stay time threshold value and the second stay time threshold value.
As previously mentioned, by judging the relation of parking duration and the first stay time threshold value, the second stay time threshold value, can know that engine exhaust heat affects situation to temperature sensor sampling value.
Step S114, if parking duration is between the first stay time threshold value and the second stay time threshold value, then obtains current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value.
If judge that parking duration is between the first stay time threshold value and the second stay time threshold value, then can obtain current outdoor environment temperature correction according to the current sample values of the first outdoor environment temperature correction, temperature sensor and engine thermal influence value.In this case, owing to considering the first outdoor environment temperature correction, the current sample values of temperature sensor and engine thermal influence value three factors, therefore the final correction result obtained is more close to truth.It should be noted that, engine thermal influence value is the parameter that parking duration according to the first cooling-liquid temperature value temperature value of refrigerant fluid (time once flame-out namely), current cooling-liquid temperature value and car load (before once stop working to the time gap of current time) calculates.The waste heat that engine thermal influence value can characterize driving engine to a certain extent affects situation to temperature sensor.
Alternatively, obtain current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value can comprise the steps: to obtain weight coefficient according to current sample values and engine thermal influence value; Current outdoor ambient temperature correction is obtained according to weight coefficient and the first outdoor environment temperature correction.Obtain current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value and can adopt the method for weighted moving average, as shown in following formula:
Wherein, Y
n+1---temperature corrected value;
Y
i---the i-th phase actual value ambient temperature correction of eve (last time stop working);
X
i---the flexible strategy of the i-th phase (flexible strategy and equal 1, calculated by Current Temperatures sensor readings and engine thermal influence value);
N---this issue.
After judging that parking duration is whether between the first stay time threshold value and the second stay time threshold value, the method can also comprise: if parking duration is less than the second stay time threshold value, then determine that the first outdoor environment temperature correction is current outdoor ambient temperature correction; If parking duration is greater than the first stay time threshold value, then determine that current sample values is current outdoor ambient temperature correction.
If parking duration is less than the second stay time threshold value, then can think that engine exhaust heat is not also able to do in time to impact temperature sensor, therefore can using the first outdoor environment temperature correction as current outdoor ambient temperature correction.If parking duration is greater than the first stay time threshold value, then can thinks that engine exhaust heat disappears, namely there is not the engine exhaust heat affecting temperature sensor, therefore, the current sample values of temperature sensor is believable data.
After obtaining current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value, the method can also comprise: the current vehicle speed obtaining car load; Obtain the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that the second outdoor environment temperature correction once obtains before being; Judge whether current vehicle speed exceedes preset vehicle speed threshold value; If current vehicle speed exceedes preset vehicle speed threshold value, then obtain current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction.
If the non-first execution of the program of said temperature correction, then can calculate a speed accumulated values according to speed information, when speed accumulated values exceedes preset vehicle speed threshold value, calculate current outdoor environment temperature correction (in attenuated form) according to the outdoor environment temperature value that Current Temperatures sensor readings and last revision program calculate.It should be noted that, when the speed of a motor vehicle is greater than certain threshold speed, this speed accumulated values is numerical value ascendant trend, otherwise, in numerical value downswing.
After obtaining current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction, the method can also comprise: judge whether current sample values is less than current outdoor ambient temperature correction; If judge that current sample values is less than current outdoor ambient temperature correction, then using current sample values as current outdoor ambient temperature correction.
If temperature sensor sampling value is lower than the correction calculated, so sensor sample value is current environmental temperature correction (in attenuated form).
It should be noted that, before execution above-mentioned steps S102 to step S114, need the assignment of carrying out variable initializer show and parameter, comprising: ProgNo=0; Model=4 (defrosting position); Recrc=0 (outer gas position); BlwrSpd=0; TmpDr=(TmpDr_P-OutAmb)/TmpDr_P; IntAirTmp=InCarSensor; I2=(TmpDr_P-OutAmb)/TmpDr_P.Wherein, ProgNo: program number computing value; Model: pattern damper positions computing value; Recrc: cycle throttle position calculation value; BlwrSpd: blower speed exports computing value; TmpDr: temperature damper position calculation value; TmpDr_P: calculate initial temperature air door constants; OutAmb: ambient temperature; IntAirTmp: car indoor temperature predictor; And InCarSensor: car indoor temperature transmitter reading; I2: accounting temperature damper positions computing value intermediate variable.
This embodiment is owing to have employed following steps: obtain the first cooling-liquid temperature value, wherein, and engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load, obtain the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load, the first stay time threshold value and the second stay time threshold value of car load is obtained according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value is for representing that the car load rear engine waste heat that stops working affects the maximum duration of temperature sensor, and the second stay time threshold value is for representing engine exhaust heat not yet to the maximum duration that temperature sensor has an impact, the current sample values of reading temperature sensor, obtain the parking duration of car load, judge parking duration whether between the first stay time threshold value and the second stay time threshold value, if parking duration is between the first stay time threshold value and the second stay time threshold value, then according to the first outdoor environment temperature correction, current sample values and engine thermal influence value obtain current outdoor ambient temperature correction, solve the problem of the car load outdoor environment temperature poor accuracy that temperature sensor obtains, and then by when parking duration is between the first stay time threshold value and the second stay time threshold value, according to the first outdoor environment temperature correction, current sample values and engine thermal influence value obtain current outdoor ambient temperature correction, reach the effect improving the accuracy obtaining outdoor environment temperature value.
Fig. 2 is the diagram of circuit of the second embodiment according to car load outdoor environment temperature modification method of the present invention.This embodiment can as a kind of preferred implementation embodiment illustrated in fig. 1.As shown in Figure 2, the method comprising the steps of S201 is to step S211:
Step S201, judges whether car load key powers on.
The algorithm routine of the ambient temperature that brings into operation after car load key powers on correction.
Step S202, if car load key powers on, then judges that whether parking period is more than Time_Stop.
Step S203, if parking period is more than Time_Stop, then ambient temperature correction=f (current environmental temperature sensor sample value).
Here, Time_Stop is the first stop threshold value.If judge that parking period is more than Time_Stop, then using current environmental temperature sensor sample value as ambient temperature correction.
Step S204, if parking period is not more than Time_Stop, then ambient temperature correction=f (parking period, last record ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value, solar irradiation)
If judge that parking period is not more than Time_Stop, then be greater than under the second stop threshold condition, ambient temperature correction is determined by parking period, last ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value and the solar irradiation recorded.If judge that parking period is not more than Time_Stop, and be less than the second stop threshold value, then ambient temperature correction is the ambient temperature correction of last record.
Step S205, if car load key does not power on, then judges whether engine speed is greater than 0.
Step S206, if engine speed is greater than 0, then judges whether the speed of a motor vehicle is greater than 0.
If engine speed is not more than 0, then perform step S202 to step S204.
Step S207, if judge that the speed of a motor vehicle is not more than 0, then ambient temperature correction=f (last record ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value, solar irradiation, continuous speed of a motor vehicle time).
If judge that the speed of a motor vehicle is 0, then ambient temperature correction records ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value, solar irradiation and continuous speed of a motor vehicle Time dependent by the last time.
Step S208, if the speed of a motor vehicle is greater than 0, then judges whether the speed of a motor vehicle is greater than Speed01.
If judge that the speed of a motor vehicle is greater than 0, then also need to judge whether the speed of a motor vehicle exceedes preset vehicle speed threshold value Speed01.
Step S209, if the speed of a motor vehicle is greater than Speed01, then judges whether the continuous speed of a motor vehicle time is greater than Time_Run01.
Step S210, if the speed of a motor vehicle time is greater than Time_Run01, then ambient temperature correction=f (current environmental temperature sensor sample value) continuously.
If the speed of a motor vehicle is greater than Speed01, and the speed of a motor vehicle time is greater than Time_Run01 continuously, then ambient temperature correction is determined by current environmental temperature sensor sample value.
If the speed of a motor vehicle time is not more than Time_Run01 continuously, then perform step S211.
Step S211, if the speed of a motor vehicle is not more than Speed01, then ambient temperature correction=f (speed of a motor vehicle, last record ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value, solar irradiation).
If the speed of a motor vehicle is not more than Speed01, then ambient temperature correction is determined by the speed of a motor vehicle, last record ambient temperature correction, engine coolant temperature, current environmental temperature sensor sample value and solar irradiation.
When car load idling or of short duration parking, because engine radiation is comparatively large, it is higher that outdoor temperature sensor gathers numeric ratio actual value, and a/c system can be caused to occur erroneous judgement, and therefore, outdoor temperature signal is the necessary condition that automatic air condition precisely controls accurately.By correction strategy of the present invention, namely utilize engine rotating speed, parking duration, engine coolant temperature, the engine coolant temperature, the speed of a motor vehicle, environment temperature sensor read signal etc. of last flame-out eve revise the temperature data of sensor collection, the impact of engine radiation can be offset, ensure that the temperature corrected value obtained truly can reflect ambient temperature, and then contribute to the mode of operation correctly regulating air-conditioning, avoid causing energy dissipation.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the diagram of circuit of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
According to embodiments of the invention, provide a kind of car load outdoor environment temperature correcting device.It should be noted that, the car load outdoor environment temperature correcting device of the embodiment of the present invention may be used for performing the car load outdoor environment temperature modification method that the embodiment of the present invention provides, and the car load outdoor environment temperature correcting device that the car load outdoor environment temperature modification method of the embodiment of the present invention also can be provided by the embodiment of the present invention performs.
Fig. 3 is the schematic diagram of the embodiment according to car load outdoor environment temperature correcting device of the present invention.As shown in Figure 3, this device comprises: the first acquiring unit 10, second acquisition unit 20, the 3rd acquiring unit 30, reading unit 40, the 4th acquiring unit 50, first judging unit 60 and the 5th acquiring unit 70.
First acquiring unit 10, for obtaining the first cooling-liquid temperature value, wherein, engine coolant temperature when the first cooling-liquid temperature value is once flame-out before car load.
Second acquisition unit 20, for obtaining the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when the first outdoor environment temperature correction is once flame-out before car load.
3rd acquiring unit 30, for obtaining the first stay time threshold value and the second stay time threshold value of car load according to the first cooling-liquid temperature value and the first outdoor environment temperature correction, wherein, first stay time threshold value affects the maximum duration of temperature sensor for the waste heat of the driving engine representing car load, and the second stay time threshold value is for representing that the waste heat of driving engine is not yet to the maximum duration that temperature sensor has an impact.
Reading unit 40, for the current sample values of reading temperature sensor.
4th acquiring unit 50, for obtaining the parking duration of car load.
First judging unit 60, for judging that the parking duration of car load is whether between the first stay time threshold value and the second stay time threshold value.
5th acquiring unit 70, for when the parking duration of car load is between the first stay time threshold value and the second stay time threshold value, obtain current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value.
Alternatively, the 5th acquiring unit 70 can comprise: the first acquisition module, for obtaining weight coefficient according to current sample values and engine thermal influence value; Second acquisition module, for obtaining current outdoor ambient temperature correction according to weight coefficient and the first outdoor environment temperature correction.
Alternatively, this device can also comprise: the 6th acquiring unit, for obtaining the current vehicle speed of car load; 7th acquiring unit, for obtaining the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that the second outdoor environment temperature correction once obtains before being; Second judging unit, for judging whether current vehicle speed exceedes preset vehicle speed threshold value; 8th acquiring unit, during for exceeding preset vehicle speed threshold value in current vehicle speed, obtains current outdoor ambient temperature correction according to current sample values and the second outdoor environment temperature correction.
Alternatively, this device can also comprise: the first determining unit, for when the parking duration of car load is less than the second stay time threshold value, determines that the first outdoor environment temperature correction is current outdoor ambient temperature correction; Second determining unit, for when the parking duration of car load is greater than the first stay time threshold value, determines that current sample values is current outdoor ambient temperature correction.
The network data exhibiting device that the present embodiment provides comprises: the first acquiring unit 10, second acquisition unit 20, the 3rd acquiring unit 30, reading unit 40, the 4th acquiring unit 50, first judging unit 60 and the 5th acquiring unit 70.By this device, solve the problem of the car load outdoor environment temperature poor accuracy that temperature sensor obtains, and then by when parking duration is between the first stay time threshold value and the second stay time threshold value, 5th acquiring unit 70 obtains current outdoor ambient temperature correction according to the first outdoor environment temperature correction, current sample values and engine thermal influence value, reaches the effect improving the accuracy obtaining outdoor environment temperature value.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general computer device, they can concentrate on single computer device, or be distributed on network that multiple computer device forms, alternatively, they can realize with the executable program code of computer device, thus, they can be stored and be performed by computer device in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a car load outdoor environment temperature modification method, is characterized in that, comprising:
Obtain the first cooling-liquid temperature value, wherein, engine coolant temperature when described first cooling-liquid temperature value is once flame-out before car load;
Obtain the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when described first outdoor environment temperature correction is once flame-out before described car load;
The first stay time threshold value and the second stay time threshold value of described car load is obtained according to described first cooling-liquid temperature value and described first outdoor environment temperature correction, wherein, described first stay time threshold value is for representing that the described car load rear engine waste heat that stops working affects the maximum duration of temperature sensor, and described second stay time threshold value is for representing described engine exhaust heat not yet to the maximum duration that described temperature sensor has an impact;
Read the current sample values of described temperature sensor;
Obtain the parking duration of described car load;
Judge described parking duration whether between described first stay time threshold value and described second stay time threshold value; And
If described parking duration is between described first stay time threshold value and described second stay time threshold value, then obtain current outdoor ambient temperature correction according to described first outdoor environment temperature correction, described current sample values and engine thermal influence value.
2. method according to claim 1, is characterized in that, after judging that described parking duration is whether between described first stay time threshold value and described second stay time threshold value, described method also comprises:
If described parking duration is less than described second stay time threshold value, then determine that described first outdoor environment temperature correction is current outdoor ambient temperature correction; And
If described parking duration is greater than described first stay time threshold value, then determine that described current sample values is described current outdoor ambient temperature correction.
3. method according to claim 1, is characterized in that, obtains current outdoor ambient temperature correction comprise according to described first outdoor environment temperature correction, described current sample values and engine thermal influence value:
Weight coefficient is obtained according to described current sample values and described engine thermal influence value; And
Described current outdoor ambient temperature correction is obtained according to described weight coefficient and described first outdoor environment temperature correction.
4. method according to claim 1, is characterized in that, after obtaining current outdoor ambient temperature correction according to described first outdoor environment temperature correction, described current sample values and engine thermal influence value, described method also comprises:
Obtain the current vehicle speed of described car load;
Obtain the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that described second outdoor environment temperature correction once obtains before being;
Judge whether described current vehicle speed exceedes preset vehicle speed threshold value; And
If described current vehicle speed exceedes described preset vehicle speed threshold value, then obtain described current outdoor ambient temperature correction according to described current sample values and described second outdoor environment temperature correction.
5. method according to claim 4, is characterized in that, after obtaining described current outdoor ambient temperature correction according to described current sample values and described second outdoor environment temperature correction, described method also comprises:
Judge whether described current sample values is less than described current outdoor ambient temperature correction; And
If judge that described current sample values is less than described current outdoor ambient temperature correction, then using described current sample values as described current outdoor ambient temperature correction.
6. method according to claim 1, is characterized in that, before acquisition first cooling-liquid temperature value, described method also comprises:
Detect described car load and whether in operational process, occur flame-out phenomenon; And
If detect that described flame-out phenomenon appears in described car load in operational process, then record engine coolant temperature and outdoor environment temperature correction when described flame-out phenomenon occurs.
7. a car load outdoor environment temperature correcting device, is characterized in that, comprising:
First acquiring unit, for obtaining the first cooling-liquid temperature value, wherein, engine coolant temperature when described first cooling-liquid temperature value is once flame-out before car load;
Second acquisition unit, for obtaining the first outdoor environment temperature correction, wherein, outdoor environment temperature correction when described first outdoor environment temperature correction is once flame-out before described car load;
3rd acquiring unit, for obtaining the first stay time threshold value and the second stay time threshold value of described car load according to described first cooling-liquid temperature value and described first outdoor environment temperature correction, wherein, described first stay time threshold value affects the maximum duration of temperature sensor for the waste heat of the driving engine representing described car load, and described second stay time threshold value is for representing that the waste heat of described driving engine is not yet to the maximum duration that described temperature sensor has an impact;
Reading unit, for reading the current sample values of described temperature sensor;
4th acquiring unit, for obtaining the parking duration of described car load;
First judging unit, for judging that the parking duration of described car load is whether between described first stay time threshold value and described second stay time threshold value; And
5th acquiring unit, for when the parking duration of described car load is between described first stay time threshold value and described second stay time threshold value, obtain current outdoor ambient temperature correction according to described first outdoor environment temperature correction, described current sample values and engine thermal influence value.
8. device according to claim 7, is characterized in that, described device also comprises:
First determining unit, for when the parking duration of described car load is less than described second stay time threshold value, determines that described first outdoor environment temperature correction is current outdoor ambient temperature correction; And
Second determining unit, for when the parking duration of described car load is greater than described first stay time threshold value, determines that described current sample values is described current outdoor ambient temperature correction.
9. device according to claim 7, is characterized in that, described 5th acquiring unit comprises:
First acquisition module, for obtaining weight coefficient according to described current sample values and described engine thermal influence value; And
Second acquisition module, for obtaining described current outdoor ambient temperature correction according to described weight coefficient and described first outdoor environment temperature correction.
10. device according to claim 7, is characterized in that, described device also comprises:
6th acquiring unit, for obtaining the current vehicle speed of described car load;
7th acquiring unit, for obtaining the second outdoor environment temperature correction, wherein, the outdoor environment temperature correction that described second outdoor environment temperature correction once obtains before being;
Second judging unit, for judging whether described current vehicle speed exceedes preset vehicle speed threshold value; And
8th acquiring unit, for when described current vehicle speed exceedes described preset vehicle speed threshold value, obtains described current outdoor ambient temperature correction according to described current sample values and described second outdoor environment temperature correction.
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| CN201410806611.5A CN104827853A (en) | 2014-12-19 | 2014-12-19 | Vehicle outdoor environment temperature correction method and device |
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