CN112485009B - Ambient temperature detection method and device, controller and vehicle - Google Patents
Ambient temperature detection method and device, controller and vehicle Download PDFInfo
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- CN112485009B CN112485009B CN202011283575.0A CN202011283575A CN112485009B CN 112485009 B CN112485009 B CN 112485009B CN 202011283575 A CN202011283575 A CN 202011283575A CN 112485009 B CN112485009 B CN 112485009B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/048—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/12—Improving ICE efficiencies
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Abstract
The embodiment of the application provides an environmental temperature detection method, an environmental temperature detection device, a controller and a vehicle, wherein the method comprises the following steps: acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor; acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the current environment temperature of the running of the whole vehicle and the air inlet temperature after intercooling under the current environment temperature according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature. The method provided by the embodiment of the application can improve the temperature detection precision, and further improve the accuracy of performance parameter correction.
Description
Technical Field
The embodiment of the application relates to the technical field of ambient temperature detection, in particular to an ambient temperature detection method, an ambient temperature detection device, a controller and a vehicle.
Background
At present, an ambient temperature sensor is installed in an SCR box and used for measuring ambient temperature around the running of a whole vehicle as an input signal to correct engine performance parameters. However, if the usage environment is severe, the flying sand and stone in the severe environment may easily hit the sensor, resulting in poor measurement accuracy or damage. For the above situation, when the ambient temperature fails, a fixed temperature is generally adopted as a substitute value for the engine correction. However, when a certain constant temperature is adopted as a substitute value (30 ℃) when the environmental temperature sensor fails, the precision is poor, so that the performance parameters of the engine correction by adopting the signal are inaccurate, and the performance and the emission of the engine are influenced. Therefore, the existing temperature detection precision is low, and the accuracy of correcting the performance parameters is poor.
Disclosure of Invention
The embodiment of the application provides an environmental temperature detection method, an environmental temperature detection device, a controller and a vehicle, which can improve the temperature detection precision and further improve the accuracy of performance parameter correction.
In a first aspect, an embodiment of the present application provides an ambient temperature detection method, including:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and oil injection amount of an engine, and determining the actual temperature difference between the current environment temperature of the running whole vehicle and the air inlet temperature after inter-cooling under the current environment temperature according to the rotating speed and the oil injection amount;
and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature.
In one possible design of the system, the system may be,
the step of determining the actual temperature difference value between the current environment temperature of the running of the whole vehicle and the intake air temperature after intercooling under the current environment temperature according to the rotating speed and the oil amount comprises the following steps:
according to the rotating speed and the oil quantity, obtaining a temperature difference value between the air inlet temperature after the inter-cooling and the running environment temperature of the whole vehicle under standard conditions by inquiring an electronic control unit pulse spectrum of the engine;
determining the actual temperature difference value between the current environment temperature of the whole vehicle and the intake air temperature after the inter-cooling under the current environment temperature according to the temperature difference value between the intake air temperature after the inter-cooling under the current environment temperature and the intake air temperature after the inter-cooling under the standard condition and the environment temperature of the whole vehicle;
the pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
In a possible design, the determining an actual temperature difference between the current ambient temperature of the entire vehicle operation and the intercooled intake air temperature under the current ambient temperature according to the temperature difference between the intercooled intake air temperature under the current ambient temperature and the ambient temperature under the standard condition and the ambient temperature of the entire vehicle operation includes:
acquiring a temperature difference correction coefficient for correcting the intake air temperature after intercooling under the current ambient temperature according to the intake air temperature after intercooling under the current ambient temperature and through a temperature difference correction curve of the intake air temperature, wherein the temperature difference correction curve of the intake air temperature is obtained through a functional relation between the actual intake air temperature after intercooling detected under different ambient temperatures and the intake air temperature after intercooling under a standard condition;
and obtaining the actual temperature difference value between the current ambient temperature of the running of the whole vehicle and the air inlet temperature after the inter-cooling under the current ambient temperature according to the temperature difference value between the air inlet temperature after the inter-cooling under the standard condition and the ambient temperature of the running of the whole vehicle and the temperature difference correction coefficient.
In one possible design, the determining the current ambient temperature according to the inter-cooling intake air temperature under the current ambient temperature and the actual temperature difference value includes:
and calculating the difference between the intercooled intake air temperature under the current environment temperature and the actual temperature to obtain the current environment temperature.
In one possible design, before the obtaining of the intercooled rear intake air temperature by the intercooled rear temperature sensor, the method further includes:
detecting whether the intercooled temperature sensor has a fault or not through a first detector;
if the fault exists, taking a preset environment temperature substitute value as the environment temperature;
if there is no fault, determining to detect the current ambient temperature by using the post-intercooling temperature sensor.
In one possible design, before the detecting whether there is a fault with the post-intercooled temperature sensor by the first detector, the method further includes:
detecting whether the ambient temperature sensor has a fault by a second detector;
if there is a failure, it is determined whether there is a failure of the inter-cooled temperature sensor by using a first detector.
In a second aspect, an embodiment of the present application provides an ambient temperature detection apparatus, including:
the intercooling rear inlet temperature acquisition module is used for acquiring the intercooling rear inlet temperature under the current environment temperature through the intercooling rear temperature sensor;
the temperature difference determining module is used for acquiring the current rotating speed and the oil injection amount of the engine and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount;
and the environment temperature determining module is used for determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference.
In a possible design, the ambient temperature determination module is specifically configured to:
according to the rotating speed and the oil quantity, obtaining a temperature difference value between the air inlet temperature after the inter-cooling and the running environment temperature of the whole vehicle under standard conditions by inquiring an electronic control unit pulse spectrum of the engine;
determining the actual temperature difference value of the intercooled intake air temperature under the current ambient temperature and the running ambient temperature of the whole vehicle according to the temperature difference values of the intercooled intake air temperature under the current ambient temperature and the running ambient temperature of the whole vehicle under the standard condition;
the pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
In a third aspect, an embodiment of the present application provides a controller, including: the controller is configured to:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and oil injection amount of an engine, and determining the actual temperature difference value between the intake temperature after intercooling and the running ambient temperature of the whole vehicle under the current ambient temperature according to the rotating speed and the oil injection amount;
and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature.
In a fourth aspect, an embodiment of the present application provides a vehicle, including:
a vehicle body;
the power system is arranged on the vehicle body and is used for providing running power;
a controller as claimed in the third aspect, configured to:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount;
and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature.
According to the ambient temperature detection method, the ambient temperature detection device, the controller and the vehicle, firstly, the air inlet temperature after intercooling is collected through the temperature sensor after intercooling, then the current rotating speed and the oil injection amount of the engine are obtained, and the actual temperature difference value between the current ambient temperature of the whole vehicle and the air inlet temperature after intercooling under the current ambient temperature is determined according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the current environment temperature is calculated based on the actual temperature difference between the intercooled intake air temperature under different environment temperatures and the corresponding environment temperature and the intercooled intake air temperature under the current environment temperature, namely the actual environment temperature, and the actual environment temperature is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings without inventive labor.
Fig. 1 is a schematic flowchart of an ambient temperature detection method according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a scene of an ambient temperature detection method according to an embodiment of the present disclosure;
fig. 3 is a schematic view of a scene of a method for detecting an ambient temperature according to another embodiment of the present application;
FIG. 4 is a schematic flowchart of a method for detecting an ambient temperature according to another embodiment of the present disclosure;
fig. 5 is a block diagram of an ambient temperature detection apparatus according to an embodiment of the present disclosure;
fig. 6 is a block diagram of a vehicle according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Currently, when the ambient temperature fails, a fixed temperature is generally used as a substitute value for engine correction. However, when a certain constant temperature is adopted as a substitute value (30 ℃) when the temperature sensor fails, the accuracy is poor, so that performance parameters of engine correction by adopting the signal are inaccurate, and the performance and the emission of the engine are affected. Therefore, the existing temperature detection precision is low, and the accuracy of performance parameter correction is poor.
In order to solve the problems, the technical idea of the application is that real environment temperature is adopted for calibration, the difference value between the air inlet temperature after intercooling and the corresponding environment temperature under different environment temperatures is obtained through acquisition of the rotating speed of an engine and the oil injection amount, the current environment temperature is obtained through calculation based on the air inlet temperature after intercooling under the current environment temperature acquired by an intercooling rear temperature sensor, the credibility of an environment temperature signal is improved when the environment temperature sensor fails or does not have the environment temperature sensor, and the degradation of the performance and the emission of the engine caused by the correction of the environment temperature is avoided.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In order to overcome the above problems and effectively implement overspeed protection control on a supercharger, an embodiment of the present application provides an ambient temperature detection method, and fig. 1 is a schematic flow diagram of the ambient temperature detection method provided in the embodiment of the present application.
Referring to fig. 1, the ambient temperature detection method includes:
s101, acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor.
In this embodiment, the execution main body for implementing the ambient temperature detection method may be a controller, and the controller controls the detection device to detect and calculate the ambient temperature of the running of the entire vehicle in real time.
In practical application, the after-intercooling temperature sensor is used for collecting the after-intercooling intake air temperature under the current ambient temperature, and the precondition is that the after-intercooling temperature sensor is normal without failure. Whether the temperature sensor is abnormal or normal after intercooling is detected can be described in detail through the following two scenes.
Scenario 1, no ambient temperature sensor is installed on the vehicle, see fig. 2. The method is realized by the following steps:
step a1, detecting whether the intercooled temperature sensor has a fault through a first detector.
And a2, if a fault exists, taking a preset environment temperature substitute value as the environment temperature.
And a3, if no fault exists, determining that the current environment temperature is detected by using the after-intercooling temperature sensor.
In this embodiment, when the current ambient temperature of the integrated operation is detected, if there is no ambient temperature sensor capable of directly detecting, the intake air temperature after intercooling may be detected by the post-intercooling temperature sensor, and then the actual value of the ambient temperature is determined based on the relationship between the intake air temperature after intercooling and the ambient temperature. Therefore, firstly, the accuracy of the detection of the after-cold air temperature needs to be ensured, and the after-cold air temperature sensor can be detected through a first detector (an engine electronic control unit-ECU air inlet temperature sensor detection module).
Specifically, if the first detector detects that the temperature sensor has a fault after inter-cooling, a preset constant temperature value, that is, a preset ambient temperature substitute value, for example, 30 ℃ is directly obtained, the preset ambient temperature substitute value is assigned to the ambient temperature, the ambient temperature is used as the current ambient temperature, and the engine performance parameter is corrected by using the preset ambient temperature substitute value. If the first detector detects that the post-intercooling temperature sensor has no fault, the post-intercooling intake air temperature under the current ambient temperature can be directly acquired through the post-intercooling temperature sensor, and the post-intercooling intake air temperature under the current ambient temperature is the actual post-intercooling intake air temperature, so that the accuracy is high, the current ambient temperature is calculated and obtained based on the acquired post-intercooling intake air temperature under the current ambient temperature and the actual temperature difference between the current ambient temperature and the post-intercooling intake air temperature under the current ambient temperature, and the precision and the accuracy of the current ambient temperature can be guaranteed.
Scene 2, the vehicle is equipped with an ambient temperature sensor, see fig. 3. The method is realized by the following steps:
and b1, detecting whether the ambient temperature sensor has a fault or not through a second detector.
And b2, if the fault exists, determining whether the fault exists in the intercooled temperature sensor or not by using the first detector.
Step a1, detecting whether the temperature sensor has a fault after the inter-cooling by a first detector.
And a2, if the fault exists, taking a preset environment temperature substitute value as the environment temperature.
And a3, if no fault exists, determining that the environment temperature is detected by using the intercooled temperature sensor.
In this embodiment, if the vehicle is equipped with an ambient temperature sensor, the second detector (engine ECU-ECU ambient temperature sensor monitoring module) may be used to detect whether the ambient temperature sensor is failed or normal. If the ambient temperature sensor is normal, the current ambient temperature can be directly detected through the ambient temperature sensor; if the ambient temperature sensor is abnormal, the measured current ambient temperature is inaccurate, the intercooling rear temperature sensor is required to be used for collecting the intercooling rear intake air temperature, then the current ambient temperature is further calculated, but in order to ensure the accuracy and the accuracy of the current ambient temperature detection calculation, whether the intercooling rear temperature sensor is invalid or normal needs to be detected firstly.
Specifically, a first detector is used for detecting a post-intercooling temperature sensor, if the first detector detects that the post-intercooling temperature sensor has a fault, a preset constant temperature value, namely a preset environment temperature substitute value, is directly obtained, the preset environment temperature substitute value is assigned to the environment temperature to serve as the current environment temperature, and the preset environment temperature substitute value is used for correcting the engine performance parameters. If the first detector detects that the post-intercooling temperature sensor has no fault, the post-intercooling intake air temperature under the current ambient temperature can be directly acquired through the post-intercooling temperature sensor, and the post-intercooling intake air temperature under the current ambient temperature is the actual post-intercooling intake air temperature, so that the accuracy is high, the current ambient temperature is calculated and obtained based on the acquired post-intercooling intake air temperature under the current ambient temperature and the actual temperature difference between the current ambient temperature and the post-intercooling intake air temperature under the current ambient temperature, and the precision and the accuracy of the current ambient temperature can be guaranteed.
S102, obtaining the current rotating speed and oil injection amount of the engine, and determining the actual temperature difference between the current environment temperature of the running whole vehicle and the air inlet temperature after inter-cooling under the current environment temperature according to the rotating speed and the oil injection amount.
In this embodiment, a mapping relationship exists between the rotation speed and the oil amount and the difference between the intercooled intake air temperature and the ambient temperature, and the actual temperature difference between the current ambient temperature and the intercooled intake air temperature at the current ambient temperature can be found by obtaining the current rotation speed and the oil amount of oil injection of the engine and using the mapping relationship.
S103, determining the current ambient temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current ambient temperature.
In this embodiment, the method may be implemented by the following steps: and calculating the difference between the air inlet temperature after the air is intercooled under the current environment temperature and the actual temperature to obtain the current environment temperature.
Namely, the current ambient temperature = the difference between the intercooled intake air temperature and the actual temperature at the current ambient temperature.
In the ambient temperature detection method provided by the embodiment, the intake air temperature after intercooling is collected by the temperature sensor after intercooling, then the current rotating speed and the oil injection amount of the engine are obtained, and the actual temperature difference between the current ambient temperature of the whole vehicle operation and the intake air temperature after intercooling under the current ambient temperature is determined according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the current environment temperature is calculated based on the actual temperature difference between the intercooled intake air temperature under different environment temperatures and the corresponding environment temperature and the intercooled intake air temperature under the current environment temperature, namely the actual environment temperature, and the actual environment temperature is obtained.
In a possible design, referring to fig. 4, fig. 4 is a schematic flowchart of an ambient temperature detection method according to another embodiment of the present application, and this embodiment describes S102 in detail based on the foregoing embodiment. With reference to fig. 2 or fig. 3, the determining an actual temperature difference between a current ambient temperature of the entire vehicle and an intake air temperature after intercooling under the current ambient temperature according to the rotation speed and the oil amount may include:
s201, obtaining a temperature difference value between the air inlet temperature after cold cooling and the running ambient temperature of the whole vehicle under a standard condition by inquiring an electronic control unit pulse spectrum of the engine according to the rotating speed and the oil quantity.
S202, determining the actual temperature difference value between the current environment temperature of the whole vehicle and the air inlet temperature after the middle cooling under the current environment temperature according to the temperature difference value between the air inlet temperature after the middle cooling under the current environment temperature and the environment temperature of the whole vehicle running under the standard condition.
The pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
In practical application, when the whole vehicle is matched with an air inlet intercooler, the temperature rise of air inlet (namely, the temperature of air inlet after intercooling is higher than the ambient temperature) is required to be not higher than 25 ℃, after the matching of the intercooler is finished, the temperature difference distribution exists between the temperature of air inlet after intercooling and the ambient temperature, the temperature difference under the state is calibrated in an engine ECU (electronic control unit) pulse spectrum, and the temperature of air inlet after intercooling is the ambient temperature plus the temperature difference under normal conditions. The engine ECU pulse spectrum is a temperature difference distribution curve obtained based on the rotational speed and oil amount tests under standard conditions, such as the curve of the difference between the cold and ambient temperatures under standard conditions shown in fig. 2 or fig. 3.
Specifically, after the current rotation speed and oil mass are obtained, the temperature difference between the intercooled intake air temperature corresponding to the rotation speed and the oil mass and the running ambient temperature of the whole vehicle under the standard condition can be obtained by querying the engine ECU pulse spectrum, but the temperature difference may have an error and needs to be adjusted in time by combining with the current environment or working condition, so as to obtain the actual temperature difference.
In one possible design, how to correct the temperature difference to obtain the actual temperature difference can be achieved by the following steps:
and c1, acquiring a temperature difference correction coefficient for correcting the intercooling inlet air temperature under the current ambient temperature according to the intercooling inlet air temperature under the current ambient temperature and through a temperature difference correction curve of the inlet air temperature, wherein the temperature difference correction curve of the inlet air temperature is obtained through a functional relation between the actual intercooling inlet air temperature detected under different ambient temperatures and the intercooling inlet air temperature under a standard condition.
And c2, obtaining the actual temperature difference value between the current environment temperature of the running whole vehicle and the air inlet temperature after the inter-cooling under the current environment temperature according to the temperature difference value between the air inlet temperature after the inter-cooling under the standard condition and the environment temperature of the running whole vehicle and the temperature difference correction coefficient.
In this embodiment, because the intercooler has different heat exchange efficiencies with the outside at different ambient temperatures, the difference between the intercooled temperature and the ambient temperature needs to be corrected based on the intercooled temperature and the intercooled temperature at different ambient temperatures, so as to improve the signal accuracy.
Specifically, a functional relation is established between the intercooled intake air temperature and the intercooled intake air temperature under the standard condition through collecting corresponding intercooled intake air temperature under different environments to obtain a temperature difference correction curve of the intake air temperature, and the engine ECU pulse spectrum stores the temperature difference between the intercooled intake air temperature and the ambient temperature under the standard condition, so that a temperature difference correction coefficient corresponding to the intercooled intake air temperature under the current environment needs to be inquired, the temperature difference between the intercooled intake air temperature and the ambient temperature under the standard condition is converted into an actual temperature difference between the intercooled intake air temperature under the current environment and the current ambient temperature, and the current ambient temperature is calculated according to the intercooled intake air temperature under the current environment and the actual temperature difference, so that the reliability of an ambient temperature signal is improved when an ambient temperature sensor fails or the ambient temperature sensor is not installed, and the degradation of the performance and the emission of the engine caused by the correction of the ambient temperature with errors is avoided.
Therefore, in the application, when the ambient temperature fails, firstly, whether the intake air temperature after intercooling has a problem is judged, and if the temperature sensor after intercooling is normal, the intake air temperature after intercooling is used for subtracting the calibration temperature difference to obtain the ambient temperature; and assigning the substitute value to the environment temperature signal only when the temperature sensor is abnormal after inter-cooling. Because the intercooler has different heat exchange efficiency with the outside under different environment temperatures, the correction of the difference value between the intercooled temperature and the environment temperature based on the intercooled temperature after entering the intercooler under different environments is increased, the signal precision is improved, the accurate environment temperature can be obtained under the condition that the environment temperature sensor is damaged or under the condition that the environment temperature sensor is not installed, and the degradation of performance and emission of the engine caused by inaccurate correction of the environment temperature is avoided.
In order to implement the ambient temperature detection method, the present embodiment provides an ambient temperature detection device, referring to fig. 5, and fig. 5 is a block diagram of the ambient temperature detection device provided in the present embodiment; the ambient temperature detection device 50 may include: an intercooled intake air temperature obtaining module 501, a temperature difference determining module 502 and an ambient temperature determining module 503; the after-intercooling intake air temperature obtaining module 501 is configured to obtain an after-intercooling intake air temperature at a current ambient temperature through an after-intercooling temperature sensor; the temperature difference determining module 502 is configured to obtain a current rotation speed and an oil amount of oil injection of the engine, and determine an actual temperature difference between an intake air temperature after intercooling and an ambient temperature of vehicle operation under a current ambient temperature according to the rotation speed and the oil amount; an ambient temperature determining module 503, configured to determine the current ambient temperature according to the intercooled intake air temperature under the current ambient temperature and the actual temperature difference.
In the embodiment, by arranging an intercooling rear intake air temperature acquisition module 501, a temperature difference determination module 502 and an ambient temperature determination module 503, the intercooling rear intake air temperature is acquired by an intercooling rear temperature sensor, then the current rotating speed and the oil injection amount of the engine are acquired, and the actual temperature difference between the current ambient temperature of the running whole vehicle and the intercooling rear intake air temperature at the current ambient temperature is determined according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the current environment temperature is calculated based on the actual temperature difference between the intercooled intake air temperature under different environment temperatures and the corresponding environment temperature and the intercooled intake air temperature under the current environment temperature, namely the actual environment temperature, and the actual environment temperature is obtained.
The ambient temperature detection apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects thereof are similar, and are not described herein again.
In a possible design, the temperature difference determining module 502 is specifically configured to:
according to the rotating speed and the oil mass, obtaining a temperature difference value between the air inlet temperature after cold cooling and the running ambient temperature of the whole vehicle under a standard condition by inquiring an electronic control unit pulse spectrum of the engine;
determining the actual temperature difference value between the current environment temperature of the whole vehicle and the air inlet temperature after the middle cooling under the current environment temperature according to the temperature difference value between the air inlet temperature after the middle cooling under the current environment temperature and the air inlet temperature after the middle cooling under the standard condition and the environment temperature of the whole vehicle;
the pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
In one possible design, the temperature difference determination module 502 is specifically configured to:
acquiring a temperature difference correction coefficient for correcting the intake air temperature after intercooling under the current ambient temperature according to the intake air temperature after intercooling under the current ambient temperature and through a temperature difference correction curve of the intake air temperature, wherein the temperature difference correction curve of the intake air temperature is obtained through a functional relation between the actual intake air temperature after intercooling detected under different ambient temperatures and the intake air temperature after intercooling under a standard condition;
and obtaining the actual temperature difference value between the current running environment temperature of the whole vehicle and the intake air temperature after intercooling under the current environment temperature according to the temperature difference value between the intake air temperature after intercooling under the standard condition and the running environment temperature of the whole vehicle and the temperature difference correction coefficient.
In one possible design, the ambient temperature determination module 503 is specifically configured to: and calculating the difference between the air inlet temperature after the air is intercooled under the current environment temperature and the actual temperature to obtain the current environment temperature.
In a possible design, the ambient temperature detection device may further include: a fault detection module; a fault detection module to: before the after-intercooling temperature sensor acquires the after-intercooling inlet air temperature, detecting whether the after-intercooling temperature sensor has a fault through a first detector;
when a fault exists, taking a preset environment temperature substitute value as the environment temperature;
determining that the current ambient temperature is detected by using the intercooled post temperature sensor when there is no fault.
In one possible design, the fault detection module is further configured to: detecting whether a fault exists in an ambient temperature sensor through a second detector before detecting whether the fault exists in the intercooled temperature sensor through a first detector;
when there is a failure, it is determined whether there is a failure in the inter-cooled temperature sensor detected by using the first detector.
In order to implement the ambient temperature detection method, the present embodiment provides a controller. The controller may be integrated by a multi-function module, the controller to:
acquiring the intake air temperature after intercooling under the current ambient temperature through an after-intercooling temperature sensor;
acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount;
and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature.
In the embodiment, the intake air temperature after intercooling is collected by the temperature sensor after intercooling, then the current rotating speed and the oil injection amount of the engine are obtained, and the actual temperature difference between the current environment temperature of the whole vehicle and the intake air temperature after intercooling under the current environment temperature is determined according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the current environment temperature is calculated based on the actual temperature difference between the intercooled intake air temperature under different environment temperatures and the corresponding environment temperature and the intercooled intake air temperature under the current environment temperature to obtain the current environment temperature, namely the actual environment temperature.
The controller provided in this embodiment may be configured to implement the technical solutions of any of the method embodiments described above, and the implementation principle and the technical effects are similar, which are not described herein again.
In order to implement the ambient temperature detection method, the present embodiment provides a vehicle. Referring to fig. 6, fig. 6 is a block diagram of a vehicle according to an embodiment of the present disclosure; the vehicle may implement any one of the embodiments of the ambient temperature detection method described in the above embodiments or the embodiment of the ambient temperature detection method executed by the controller described in the above embodiments, where the vehicle may include: a vehicle body 601; a power system 602 mounted on the vehicle body for providing driving power; the controller 603 according to the above embodiment is configured to obtain, by using the post-intercooling temperature sensor, a post-intercooling intake air temperature at the current ambient temperature; acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature.
In the embodiment, by arranging the vehicle body 601, the power system 602 and the controller 603, the intake air temperature after intercooling is acquired by the temperature sensor after intercooling, then the current rotating speed and the oil injection amount of the engine are obtained, and the actual temperature difference between the current environment temperature of the whole vehicle and the intake air temperature after intercooling under the current environment temperature is determined according to the rotating speed and the oil injection amount; and determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the current environment temperature is calculated based on the actual temperature difference between the intercooled intake air temperature under different environment temperatures and the corresponding environment temperature and the intercooled intake air temperature under the current environment temperature, namely the actual environment temperature, and the actual environment temperature is obtained.
The vehicle provided in this embodiment may be used to implement the technical solutions of any of the above methods and controller embodiments, and the implementation principle and technical effects are similar, which are not described herein again.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. An ambient temperature detection method, comprising:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the current environment temperature of the running of the whole vehicle and the air inlet temperature after intercooling under the current environment temperature according to the rotating speed and the oil injection amount;
determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature;
determining the current ambient temperature according to the intercooled intake air temperature and the actual temperature difference under the current ambient temperature includes:
and calculating the difference between the air inlet temperature after the air is intercooled under the current environment temperature and the actual temperature to obtain the current environment temperature.
2. The method according to claim 1, wherein determining an actual temperature difference between a current ambient temperature of vehicle operation and an intake air temperature after intercooling at the current ambient temperature according to the rotation speed and the oil amount comprises:
according to the rotating speed and the oil mass, obtaining a temperature difference value between the air inlet temperature after cold cooling and the running ambient temperature of the whole vehicle under a standard condition by inquiring an electronic control unit pulse spectrum of the engine;
determining the actual temperature difference value between the current environment temperature of the whole vehicle and the air inlet temperature after the middle cooling under the current environment temperature according to the temperature difference value between the air inlet temperature after the middle cooling under the current environment temperature and the air inlet temperature after the middle cooling under the standard condition and the environment temperature of the whole vehicle;
the pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
3. The method according to claim 2, wherein the determining the actual temperature difference between the current ambient temperature of the vehicle operation and the intercooled intake air temperature at the current ambient temperature according to the temperature difference between the intercooled intake air temperature at the current ambient temperature and the ambient temperature of the vehicle operation under the standard condition comprises:
acquiring a temperature difference correction coefficient for correcting the intake air temperature after intercooling under the current ambient temperature according to the intake air temperature after intercooling under the current ambient temperature and through a temperature difference correction curve of the intake air temperature, wherein the temperature difference correction curve of the intake air temperature is obtained through a functional relation between the actual intake air temperature after intercooling detected under different ambient temperatures and the intake air temperature after intercooling under a standard condition;
and obtaining the actual temperature difference value between the current ambient temperature of the running of the whole vehicle and the air inlet temperature after the inter-cooling under the current ambient temperature according to the temperature difference value between the air inlet temperature after the inter-cooling under the standard condition and the ambient temperature of the running of the whole vehicle and the temperature difference correction coefficient.
4. The method of any of claims 1-3, wherein prior to said obtaining, by an intercooled post-temperature sensor, an intercooled post-intake air temperature, the method further comprises:
detecting whether the intercooled temperature sensor has a fault through a first detector;
if the fault exists, taking a preset environment temperature substitute value as the environment temperature;
if there is no fault, determining to detect the current ambient temperature by using the post-intercooling temperature sensor.
5. The method of claim 4, wherein prior to said detecting by the first detector whether the post-intercooled temperature sensor is malfunctioning, the method further comprises:
detecting whether the ambient temperature sensor has a fault through a second detector;
if there is a failure, it is determined whether there is a failure of the inter-cooled temperature sensor by using a first detector.
6. An ambient temperature detection device, comprising:
the intercooling rear inlet temperature acquisition module is used for acquiring the intercooling rear inlet temperature under the current ambient temperature through the intercooling rear temperature sensor;
the temperature difference determining module is used for acquiring the current rotating speed and the oil injection amount of the engine and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount;
the ambient temperature determining module is used for determining the current ambient temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current ambient temperature;
the ambient temperature determining module is specifically configured to calculate a difference between the intercooled intake air temperature and the actual temperature difference under the current ambient temperature to obtain the current ambient temperature.
7. The apparatus of claim 6, wherein the ambient temperature determination module is specifically configured to:
according to the rotating speed and the oil quantity, obtaining a temperature difference value between the air inlet temperature after the inter-cooling and the running environment temperature of the whole vehicle under standard conditions by inquiring an electronic control unit pulse spectrum of the engine;
determining the actual temperature difference value of the intercooled intake air temperature under the current ambient temperature and the running ambient temperature of the whole vehicle according to the temperature difference values of the intercooled intake air temperature under the current ambient temperature and the running ambient temperature of the whole vehicle under the standard condition;
the pulse spectrum of the electronic control unit of the engine is used for representing a temperature difference distribution curve obtained based on a rotating speed and oil quantity test under a standard condition.
8. A controller, comprising: the controller is configured to:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and the oil injection amount of an engine, and determining the actual temperature difference between the air inlet temperature after intercooling and the running environment temperature of the whole vehicle under the current environment temperature according to the rotating speed and the oil injection amount;
determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature;
determining the current ambient temperature according to the intercooled intake air temperature and the actual temperature difference under the current ambient temperature includes:
and calculating the difference between the intercooled intake air temperature under the current environment temperature and the actual temperature to obtain the current environment temperature.
9. A vehicle, characterized by comprising:
a vehicle body;
the power system is arranged on the vehicle body and is used for providing running power;
the controller of claim 8, configured to:
acquiring the air inlet temperature after intercooling under the current ambient temperature through an intercooling temperature sensor;
acquiring the current rotating speed and oil injection amount of an engine, and determining the actual temperature difference value between the intake temperature after intercooling and the running ambient temperature of the whole vehicle under the current ambient temperature according to the rotating speed and the oil injection amount;
determining the current environment temperature according to the difference value between the intercooled intake air temperature and the actual temperature under the current environment temperature;
determining the current environment temperature according to the intercooled intake air temperature under the current environment temperature and the actual temperature difference, wherein the determining comprises:
and calculating the difference between the air inlet temperature after the air is intercooled under the current environment temperature and the actual temperature to obtain the current environment temperature.
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| CN201749031U (en) * | 2010-06-25 | 2011-02-16 | 上海柴油机股份有限公司 | Heat balance test device for engine road test |
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| TW418122B (en) * | 1998-12-29 | 2001-01-11 | Po Hang Iron & Steel | Method for manufacturing hot rolled galvanized steel sheet at high speed, with pickling skipped |
| KR100368728B1 (en) * | 1998-12-29 | 2003-03-31 | 주식회사 포스코 | Manufacturing method of hot-dip galvanized steel sheet containing silicon |
| DE102004060060B3 (en) * | 2004-12-14 | 2006-05-18 | Ziehm Imaging Gmbh | Mobile X-ray diagnostic device for cinema enterprise, has heat exchanger arranged in generator tank, where X-ray power is reduced to values corresponding to cooling power of exchanger and anode, when temperature is above/below maximum value |
| CN101526042B (en) * | 2008-12-23 | 2011-07-06 | 天津大学 | Electronic control method of variable gas inlet and exhaust system of compression ignition engine |
| CN102221469B (en) * | 2011-03-24 | 2013-01-02 | 北京北机机电工业有限责任公司 | Comprehensive test bed for vehicle warmer |
| CN106156448B (en) * | 2016-08-16 | 2019-08-16 | 潍柴动力股份有限公司 | A kind of rebuffed on-line checking appraisal procedure of fuel oil |
| CN110374753B (en) * | 2019-07-19 | 2022-03-01 | 潍柴动力股份有限公司 | Engine cold start control method and device |
| CN111272443B (en) * | 2020-02-26 | 2022-04-05 | 潍柴动力股份有限公司 | Method and device for diagnosing heat dissipation system, vehicle, electronic device and storage medium |
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| CN201749031U (en) * | 2010-06-25 | 2011-02-16 | 上海柴油机股份有限公司 | Heat balance test device for engine road test |
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