CN114056048A - Vehicle ambient temperature correction method and system - Google Patents
Vehicle ambient temperature correction method and system Download PDFInfo
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- CN114056048A CN114056048A CN202111412351.XA CN202111412351A CN114056048A CN 114056048 A CN114056048 A CN 114056048A CN 202111412351 A CN202111412351 A CN 202111412351A CN 114056048 A CN114056048 A CN 114056048A
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- ambient temperature
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- temperature
- vehicle
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012937 correction Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000007613 environmental effect Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 238000010992 reflux Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
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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
- B60H1/00764—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 vehicle driving condition, e.g. speed
-
- 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
-
- 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
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to the technical field of automobile control, and provides a method for correcting an automobile ambient temperature, which comprises the following steps: s1, acquiring vehicle speed v and engine water temperature value T in real timeWater (W)And the ambient temperature acquisition value TCollecting(ii) a S2, detecting whether the vehicle is in a starting state at present, if so, executing a step S3, and if not, executing a step S4; s3, based on the engine water temperature value TWater (W)To determine the ambient temperature output value TOutput of(ii) a S4, collecting value T based on vehicle speed v and environment temperatureCollectingPulling up to determine the ambient temperature output value TOutput of. The influence of the hot reflux of the front cabin under the working conditions of low speed and idling is reduced to the minimum by correction, and meanwhile, the updating sensitivity of the environmental temperature under the high-speed stable working condition can be kept.
Description
Technical Field
The invention relates to the technical field of automobile temperature acquisition, and provides an automobile environment temperature correction method and system.
Background
At present, environmental temperature sensors of most vehicle types are arranged on a front bumper of a vehicle, and due to the fact that thermal backflow of a front cabin is large under working conditions of low speed, idling and the like, the environmental temperature output under the working conditions is inaccurate, or after processing logic for limiting the low-speed temperature rise rate is adopted, the temperature updating is not sensitive enough; the inaccurate temperature display in the car of ambient temperature and many controllers that use ambient temperature, its control, work all can be because of the influence of ambient temperature and become inaccurate.
Disclosure of Invention
The invention provides a vehicle ambient temperature correction method, which aims to correct acquired ambient temperature and output correct ambient temperature.
The invention is realized in such a way that a method for correcting the ambient temperature for a vehicle specifically comprises the following steps:
s1, acquiring vehicle speed v and engine water temperature value T in real timeWater (W)And the ambient temperature acquisition value TCollecting；
S2, detecting whether the vehicle is in a starting state at present, if so, executing a step S3, and if not, executing a step S4;
s3, based on the engine water temperature value TWater (W)To determine the ambient temperature output value TOutput of；
S4, collecting value T based on vehicle speed v and environment temperatureCollectingPulling up to determine the ambient temperature output value TOutput of。
Further, the ambient temperature output value T in the starting stateOutput ofThe acquisition method specifically comprises the following steps:
detecting water temperature value T of engineWater (W)Collecting value T with ambient temperatureCollectingWhether the difference is greater than a temperature threshold;
if the detection result is yes, taking the stored last ambient temperature output value as the current ambient temperature output value;
and if the detection result is negative, taking the current environment temperature acquisition value as the current environment temperature output value.
Further, the ambient temperature output value T under the non-starting stateOutput ofThe acquisition method specifically comprises the following steps:
detecting the speed of the vehicle in real time, and if the speed of the vehicle is less than a speed threshold v1Then the stored last ambient temperature output value is taken as the current ambient temperature output value.
Further, if the vehicle speed is greater than the vehicle speed threshold v1Detecting an environment temperature difference value delta T in a set time interval, and if the environment temperature difference value delta T is smaller than the set temperature difference value, taking a current environment temperature acquisition value as a current environment temperature output value;
and if the environmental temperature difference value delta T is smaller than the set temperature difference value, taking the stored last environmental temperature output value as the current environmental temperature output value.
Further, after the current ambient temperature output value is output, the ambient temperature stored in the storage unit is output to the ambient temperature output value updated to the current output.
The present invention is achieved as such, in an ambient temperature correction system for a vehicle, the system including:
the temperature sensor I is arranged in a front cabin of the vehicle and is used for acquiring the ambient temperature T in the vehicleCollecting
A temperature sensor II arranged in the cooling cycle for collecting the water temperature value T of the engineWater (W)；
The temperature sensor I and the temperature sensor II are in communication connection with the controller ECU, the controller ECU reads the current speed of the vehicle from the CAN bus in real time, determines an ambient temperature output value based on the vehicle ambient temperature correction method of any one of claims 1 to 6, and stores the currently output ambient temperature output value in the storage unit.
Further, when the power is firstly turned on or the ECU of the controller is reset, the ambient temperature output value T is outputOutput ofIs a default temperature value.
According to the invention, the environment temperature acquisition value is corrected, so that the output environment temperature data is not greatly fluctuated due to the influence of the heat reflux of the whole vehicle, and data support is provided for various controllers needing to use environment temperature parameters in the vehicle; the influence of the hot reflux of the front cabin under the working conditions of low speed and idling is reduced to the minimum by correction, and meanwhile, the updating sensitivity of the environmental temperature under the high-speed stable working condition can be kept. And the cost is low without improving hardware. The method is suitable for different vehicle types and sensor position arrangement, and different vehicle types can be met without adjusting the set fixed data.
Drawings
Fig. 1 is a flowchart of a method for correcting an ambient temperature of a vehicle according to an embodiment of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for correcting an ambient temperature of a vehicle according to an embodiment of the present invention, where the method specifically includes the following steps:
s1, acquiring vehicle speed signal v and engine water temperature value T in real timeWater (W)And the ambient temperature acquisition value TCollecting；
S2, determining whether the vehicle is in a starting state at present, if so, executing a step S3, and if not, executing a step S4;
s3, based on the engine water temperature value TWater (W)To determine the ambient temperature output value TOutput of；
S4, collecting value T based on vehicle speed and environment temperatureCollectingPulling up to determine the ambient temperature output value TOutput of。
In the embodiment of the invention, the ambient temperature output value T under the starting working conditionOutput ofThe determination method specifically comprises the following steps:
detecting water temperature value T of engineWater (W)Collecting value T with ambient temperatureCollectingIf the difference is greater than the temperature threshold, taking the stored last ambient temperature output value as the current ambient temperature output value and storing the current ambient temperature output value; and if the detection result is negative, taking the current environment temperature acquisition value as the current environment temperature output value, and storing the current environment temperature output value.
In the embodiment of the invention, the ambient temperature output value T after the vehicle is startedOutput ofThe determination method specifically comprises the following steps:
detecting the speed of the vehicle in real time when the speed is less than a speed threshold v1If so, the stored last ambient temperature output value is taken as the current ambient temperature to be outputA value and storing a current ambient temperature output value; when the vehicle speed is greater than the vehicle speed threshold value v1Detecting an environment temperature difference value delta T in a set time interval, if the environment temperature difference value delta T is smaller than the set temperature difference value, taking a current environment temperature acquisition value as a current environment temperature output value, and storing the current environment temperature output value; and if the environmental temperature difference value delta T is smaller than the set temperature difference value, taking the stored last environmental temperature output value as the current environmental temperature output value, and storing the current environmental temperature output value.
The embodiment of the invention provides a vehicle ambient temperature correction system, which comprises:
the temperature sensor I is arranged in a front cabin of the vehicle and is used for acquiring the ambient temperature T in the vehicleCollecting
A temperature sensor II arranged at the outlet of the engine of the cooling circulation pipeline and used for collecting the temperature of the cooling liquid when the cooling liquid starts the engine, namely the temperature T of the engine waterWater (W)；
The temperature sensor I and the temperature sensor II are in communication connection with the controller ECU, the controller ECU reads the current speed of the vehicle from the CAN bus in real time, determines an ambient temperature output value based on the vehicle ambient temperature correction method, and stores the current output ambient temperature output value in the storage unit.
The following is a specific embodiment of the vehicle environment temperature correction method, and the controller ECU obtains the real-time vehicle speed v and the engine water temperature value TWater (W)And the ambient temperature acquisition value TCollectingSetting a vehicle speed threshold v1；
The first working condition is as follows: vehicle starting condition
The vehicle may be parked for a short time during driving or parked for a long time after being shut down before being started. For the former, the position of the temperature sensor I can have thermal reflux to cause inaccurate collected ambient temperature, and the ambient temperature is approximately equal to the memory temperature of the controller before flameout and is not changed due to short-time parking. For the latter, due to long-term parking, there may be a change in ambient temperature, while the sensor position thermal reflux is negligible, and the collected ambient temperature may be used as an output.
Aiming at the starting working condition, the ECU of the controller judges the water temperature T of the engineWater (W)Collecting value T with ambient temperatureCollectingThe relationship of (1): if TWater (W)-TCollectingThe temperature is more than 10 ℃, and the controller ECU outputs and memorizes the ambient temperature, namely the ambient temperature output value TOutput ofThe last ambient temperature output value stored by the controller ECU; if TWater (W)-TCollectingLess than or equal to 10 ℃, and the controller ECU outputs an environmental temperature acquisition value acquired in real time, namely TOutput of＝TCollecting；
The second working condition is as follows: non-vehicle start-up conditions
After starting, because the water temperature of the engine gradually rises, if the vehicle speed is too low, the ambient temperature of the sensor gradually rises and cannot represent the real ambient temperature. At this time, the controller ECU determines whether the real-time vehicle speed v is greater than a vehicle speed threshold v1：
When the real-time vehicle speed v is less than the vehicle speed threshold value v1When the controller ECU outputs an ambient temperature, TOutput ofThe last ambient temperature output value stored by the controller ECU;
when the real-time vehicle speed v is greater than the vehicle speed threshold v1More natural wind blows the sensor and the reduction of thermal reflux will cause TCollectingGradually approaching the true ambient temperature. The controller ECU judges the trend of the ambient temperature collection value changing along with time, if the ambient temperature collection value changes faster, the thermal reflux is considered to be larger, and the last ambient temperature output value stored by the controller ECU is output. And if the environment temperature acquisition value does not change for a long time, the acquired environment temperature value is considered to be equal to the real environment temperature. Under the working condition, setting a time interval value t1And the temperature difference Δ T. Controller ECU acquires environmental temperature T acquired by sensor in real timeCollectingAnd calculating in real time at a set time interval t1And if the delta T is larger than the set temperature difference value, the controller ECU outputs the constant ambient temperature, namely TOutput ofThe last ambient temperature output value stored by the controller ECU; if delta T is smaller than the set temperature difference value, the controller ECU outputs an environmental temperature value acquired in real time, namely TOutput of＝TCollecting；
Wherein the ambient temperature outputs a value TOutput ofWill be stored in real time in a memory chip of the controller ECU, when the controller is first powered on or reset, TOutput ofIs the default temperature.
Wherein, a vehicle speed threshold value v and a time interval value t are set1Obtaining the difference value of the set temperature through real vehicle calibration, and setting a time interval value t1The smaller the output ambient temperature, the more sensitive the update, and the sensitivity of the sensor itself needs to be considered in setting the temperature difference.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A method for correcting the ambient temperature for a vehicle is characterized by comprising the following steps:
s1, acquiring vehicle speed v and engine water temperature value T in real timeWater (W)And the ambient temperature acquisition value TCollecting；
S2, determining whether the vehicle is in a starting state at present, if so, executing a step S3, and if not, executing a step S4;
s3, based on the engine water temperature value TWater (W)To determine the ambient temperature output value TOutput of；
S4, collecting value T based on vehicle speed v and environment temperatureCollectingPulling up to determine the ambient temperature output value TOutput of。
2. The ambient temperature correction method for vehicle as claimed in claim 2, wherein the ambient temperature output value T in the startup stateOutput ofThe acquisition method specifically comprises the following steps:
detecting water temperature value T of engineWater (W)Collecting value T with ambient temperatureCollectingWhether the difference is greater than a temperature threshold;
if the detection result is yes, taking the stored last ambient temperature output value as the current ambient temperature output value;
if the detection result is negative, the current environment temperature acquisition value is used as the current environment temperature output value.
3. The ambient temperature correction method for vehicle according to claim 1, wherein the ambient temperature output value T in the non-activated stateOutput ofThe acquisition method specifically comprises the following steps:
detecting the speed of the vehicle in real time, and if the speed of the vehicle is less than a speed threshold v1Then the stored last ambient temperature output value is taken as the current ambient temperature output value.
4. The ambient temperature correction method for vehicle according to claim 3, wherein if the vehicle speed is greater than the vehicle speed threshold value v1Detecting an environment temperature difference value delta T in a set time interval, and if the environment temperature difference value delta T is smaller than the set temperature difference value, taking a current environment temperature acquisition value as a current environment temperature output value;
and if the environmental temperature difference value delta T is smaller than the set temperature difference value, taking the stored last environmental temperature output value as the current environmental temperature output value.
5. The ambient temperature correction method for vehicles according to any one of claims 1 to 4, wherein after the current ambient temperature output value is output, the ambient temperature stored in the storage unit is output to the ambient temperature output value updated to the current output.
6. An ambient temperature correction system for a vehicle, the system comprising:
the temperature sensor I is arranged in a front cabin of the vehicle and is used for acquiring the ambient temperature T in the vehicleCollecting
A temperature sensor II arranged at the outlet of the engine of the cooling circulation pipeline and used for collecting the temperature of the cooling liquid when the cooling liquid starts the engine, namely the temperature T of the engine waterWater (W)；
The temperature sensor I and the temperature sensor II are in communication connection with the controller ECU, the controller ECU reads the current speed of the vehicle from the CAN bus in real time, determines an ambient temperature output value based on the vehicle ambient temperature correction method of any one of claims 1 to 5, and stores the currently output ambient temperature output value in the storage unit.
7. The ambient temperature correction system for vehicle as claimed in claim 1, wherein the ambient temperature output value T is set when power is first applied or when the controller ECU is resetOutput ofIs a default temperature value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111412351.XA CN114056048B (en) | 2021-11-25 | 2021-11-25 | Method and system for correcting environment temperature of vehicle |
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| CN202111412351.XA CN114056048B (en) | 2021-11-25 | 2021-11-25 | Method and system for correcting environment temperature of vehicle |
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| CN114056048B CN114056048B (en) | 2023-05-09 |
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Citations (8)
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|---|---|---|---|---|
| JPH0550832A (en) * | 1991-08-19 | 1993-03-02 | Zexel Corp | Outside air temperature detecting device for automobile |
| US5416728A (en) * | 1993-06-01 | 1995-05-16 | Chrysler Corporation | System and method for determining ambient temperature outside of a vehicle |
| US20060144581A1 (en) * | 2002-12-09 | 2006-07-06 | Daimlerchrysler Ag | Method for the regulation of an air-conditioning unit for a vehicle with closing chassis openings |
| CN103171501A (en) * | 2011-12-26 | 2013-06-26 | 上海汽车集团股份有限公司 | Correcting method and correcting device of environment temperature for vehicle |
| CN103465751A (en) * | 2013-09-25 | 2013-12-25 | 惠州市华阳多媒体电子有限公司 | Device and method for correcting environment temperature outside vehicle |
| CN103625396A (en) * | 2013-12-10 | 2014-03-12 | 惠州市德赛西威汽车电子有限公司 | Out-temperature acquisition and display method |
| CN104118327A (en) * | 2013-04-27 | 2014-10-29 | 杭州三花研究院有限公司 | Environment temperature obtaining method and control unit using same |
| CN107539064A (en) * | 2017-10-30 | 2018-01-05 | 重庆长安汽车股份有限公司 | Air conditioning for automobiles environment temperature judges system |
-
2021
- 2021-11-25 CN CN202111412351.XA patent/CN114056048B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550832A (en) * | 1991-08-19 | 1993-03-02 | Zexel Corp | Outside air temperature detecting device for automobile |
| US5416728A (en) * | 1993-06-01 | 1995-05-16 | Chrysler Corporation | System and method for determining ambient temperature outside of a vehicle |
| US20060144581A1 (en) * | 2002-12-09 | 2006-07-06 | Daimlerchrysler Ag | Method for the regulation of an air-conditioning unit for a vehicle with closing chassis openings |
| CN103171501A (en) * | 2011-12-26 | 2013-06-26 | 上海汽车集团股份有限公司 | Correcting method and correcting device of environment temperature for vehicle |
| CN104118327A (en) * | 2013-04-27 | 2014-10-29 | 杭州三花研究院有限公司 | Environment temperature obtaining method and control unit using same |
| CN103465751A (en) * | 2013-09-25 | 2013-12-25 | 惠州市华阳多媒体电子有限公司 | Device and method for correcting environment temperature outside vehicle |
| CN103625396A (en) * | 2013-12-10 | 2014-03-12 | 惠州市德赛西威汽车电子有限公司 | Out-temperature acquisition and display method |
| CN107539064A (en) * | 2017-10-30 | 2018-01-05 | 重庆长安汽车股份有限公司 | Air conditioning for automobiles environment temperature judges system |
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Effective date of registration: 20240416 Address after: 241000 No. 8, Changchun Road, Wuhu economic and Technological Development Zone, Anhui, China Patentee after: CHERY AUTOMOBILE Co.,Ltd. Country or region after: China Address before: 241000 Building 8, science and Technology Industrial Park, 717 Zhongshan South Road, Yijiang District, Wuhu City, Anhui Province Patentee before: Chery Commercial Vehicles (Anhui) Co., Ltd. Country or region before: China |
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