CN108104964B - Intake air temperature correction method and device and engine controller - Google Patents
Intake air temperature correction method and device and engine controller Download PDFInfo
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- CN108104964B CN108104964B CN201711391493.6A CN201711391493A CN108104964B CN 108104964 B CN108104964 B CN 108104964B CN 201711391493 A CN201711391493 A CN 201711391493A CN 108104964 B CN108104964 B CN 108104964B
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
- F02D2200/0416—Estimation of air temperature
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- Combustion & Propulsion (AREA)
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- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides an air inlet temperature correction method, an air inlet temperature correction device and an engine controller, wherein the method is applied to the engine controller and comprises the steps of determining the current working condition of an engine; determining the current absorbed heat of the air inlet temperature sensor under the current working condition; and correcting the intake air temperature measured by the intake air temperature sensor according to the current absorbed heat. Based on the method disclosed by the invention, the measurement error of the air inlet temperature sensor can be reduced or even eliminated on the premise of not increasing the manufacturing cost and the weight of the whole vehicle, and more reliable input is provided for the calculation of the subsequent air inlet quantity, so that the economical efficiency and the dynamic property of the engine are optimized.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an intake air temperature correction method and device and an engine controller.
Background
In EGR (Exhaust Gas Recirculation), it is necessary to supply oil to a cylinder in combination with an intake air amount of an engine, and therefore, it is important to accurately measure the intake air amount of the engine.
At present, the air inlet temperature and the air inlet pressure are mainly measured by using a sensor, and the air inlet amount is calculated by combining the space volume of the air. The intake air temperature sensor for measuring the intake air temperature is arranged in the intake manifold, and the core element is a thermistor, so the intake air temperature sensor is greatly influenced by the heat radiation of devices such as an engine cylinder sleeve, a supercharger and the like, and the intake air temperature measurement deviation is easily caused.
Disclosure of Invention
In view of the above, the present invention provides an intake air temperature correction method and apparatus to solve the problem of intake air temperature measurement deviation caused by the influence of heat radiation on an intake air temperature sensor. The technical scheme is as follows:
an intake air temperature correction method applied to an engine controller includes:
determining the current working condition of the engine;
determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
Preferably, the determining the current operating condition of the engine comprises:
acquiring the current rotating speed and the current oil injection quantity of the engine;
and determining the current working condition according to the current rotating speed and the current fuel injection quantity.
Preferably, the determining the current absorbed heat of the intake air temperature sensor under the current operating condition includes:
the corresponding relation between the preset working condition and the absorbed heat is adjusted;
and determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
Preferably, the correcting the intake air temperature measured by the intake air temperature sensor according to the current amount of heat absorbed includes:
calculating the temperature rise of the air inlet temperature sensor according to the current heat absorption quantity;
and taking the difference value between the intake air temperature measured by the intake air temperature sensor and the temperature rise as the actual intake air temperature.
An intake air temperature correction device comprising: the device comprises a first determining module, a second determining module and a correcting module;
the first determination module is used for determining the current working condition of the engine;
the second determining module is used for determining the current absorbed heat of the air inlet temperature sensor under the current working condition, and the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and the correction module is used for correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
Preferably, the first determining module is specifically configured to:
acquiring the current rotating speed and the current oil injection quantity of the engine; and determining the current work working condition according to the current rotating speed and the current oil injection quantity.
Preferably, the second determining module is specifically configured to:
the corresponding relation between the preset working condition and the absorbed heat is adjusted; and determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
Preferably, the modification module is specifically configured to:
calculating the temperature rise of the air inlet temperature sensor according to the current heat absorption quantity; and taking the difference value between the intake air temperature measured by the intake air temperature sensor and the temperature rise as the actual intake air temperature.
An engine controller comprising: a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute a program stored in the memory, wherein the program is configured to:
determining the current working condition of the engine;
determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the current working condition under the influence of heat radiation;
and correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
Compared with the prior art, the invention has the following beneficial effects:
the method can reduce or even eliminate the measurement error of the air inlet temperature sensor on the premise of not increasing the manufacturing cost and the weight of the whole vehicle, and provides more reliable input for the calculation of the subsequent air inlet quantity, thereby optimizing the economy and the dynamic property of the engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method of intake air temperature correction provided by an embodiment of the present invention;
FIG. 2 is a partial method flow diagram of an intake air temperature correction method provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an intake air temperature correction device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an intake air temperature correction method, which is applied to an engine controller, and a flow chart of the method is shown in figure 1, and comprises the following steps:
s10, determining the current working condition of the engine;
in this embodiment, because the engine can produce different heats under different operating modes, this influence that causes just also is different to intake air temperature sensor, consequently can revise the intake air temperature that heat radiation measured to intake air temperature sensor based on the operating mode.
Specifically, the operation modes of the engine include three types, namely normal, heating and regeneration, and the working condition in each operation mode is different. And each working condition has a certain rotating speed range and an oil injection amount range, so that the current working condition can be determined based on the current rotating speed and the current oil injection amount of the engine.
S20, determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
in this embodiment, a similar method may be used to measure the heat absorbed by the intake air temperature sensor under different conditions due to the influence of thermal radiation. In the process, the engine cylinder sleeve and the supercharger under different working conditions are equivalent to heat sources with different temperatures, and the heat absorbed in a steady state at the same distance with the air inlet temperature sensor is measured by a calorimeter. By using the method, the heat absorbed by the air inlet temperature sensor under different working conditions of the engine can be calibrated.
In a specific implementation, the step S20 "determining the current heat absorption of the intake air temperature sensor under the current operating condition" may specifically adopt the following steps, and the flowchart of the method is shown in fig. 2:
s201, taking a corresponding relation between preset working conditions and absorbed heat;
in this embodiment, the corresponding relationship may be recorded in the MAP table, or may be recorded in a working condition-absorbed heat curve, which is not specifically limited, and may be selected according to actual needs.
And S202, determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
S30, correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption quantity;
in this embodiment, the method can be implemented according to the law of thermodynamics: the temperature rise is the absorbed heat/(specific heat capacity by mass), i.e., Δ T is Q/(C by M), where the specific heat capacity and mass of the intake air temperature sensor are both known constants. Further, the difference between the intake air temperature measured by the intake air temperature sensor and the temperature rise is taken as the actual intake air temperature.
The above steps S201 to S202 are only one preferable implementation manner of the process of determining the current heat absorption of the intake air temperature sensor under the current operating condition in step S20 in the embodiment of the present application, and the specific implementation manner of the process may be arbitrarily set according to the needs of the user, and is not limited herein.
The intake air temperature correction method provided by the invention can reduce or even eliminate the measurement error of the intake air temperature sensor on the premise of not increasing the manufacturing cost and the weight of the whole vehicle, and provides more reliable input for the calculation of the subsequent intake air amount, thereby optimizing the economy and the dynamic property of the engine.
Based on the intake air temperature correction method provided by the above embodiment, an embodiment of the present invention correspondingly provides an apparatus for performing the above intake air temperature correction method, where a schematic structural diagram of the apparatus is shown in fig. 3, and the apparatus includes: a first determination module 10, a second determination module 20 and a correction module 30;
the system comprises a first determination module 10, a second determination module and a control module, wherein the first determination module is used for determining the current working condition of an engine;
the second determining module 20 is configured to determine a current absorbed heat of the intake air temperature sensor under a current working condition, where the current absorbed heat is used to represent a heat absorbed by the intake air temperature sensor under the influence of heat radiation;
and the correction module 30 is used for correcting the intake air temperature measured by the intake air temperature sensor according to the current absorbed heat.
In some other embodiments, the first determining module 10 is specifically configured to:
acquiring the current rotating speed and the current oil injection quantity of the engine; and determining the current work working condition according to the current rotating speed and the current oil injection quantity.
In some other embodiments, the second determining module 20 is specifically configured to:
the corresponding relation between the preset working condition and the absorbed heat is adjusted; and determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
In some other embodiments, the modification module 30 is specifically configured to:
calculating the temperature rise of the air inlet temperature sensor according to the current absorbed heat; the difference between the intake air temperature measured by the intake air temperature sensor and the temperature rise is taken as the actual intake air temperature.
The intake air temperature correction device provided by the invention can reduce or even eliminate the measurement error of the intake air temperature sensor on the premise of not increasing the manufacturing cost and the weight of the whole vehicle, and provides more reliable input for the calculation of the subsequent intake air amount, thereby optimizing the economy and the dynamic property of the engine.
Based on the intake air temperature correction method and the intake air temperature correction device provided by the above embodiments, the embodiment of the invention provides an engine controller, which includes a memory and a processor;
a memory for storing a program;
a processor for executing a program stored in memory, wherein the program is for:
determining the current working condition of the engine;
determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and correcting the intake air temperature measured by the intake air temperature sensor according to the current absorbed heat.
The engine controller provided by the invention can reduce or even eliminate the measurement error of the air inlet temperature sensor on the premise of not increasing the manufacturing cost and the weight of the whole vehicle, and provides more reliable input for the calculation of the subsequent air inlet quantity, thereby optimizing the economy and the dynamic property of the engine.
The intake air temperature correction method, the intake air temperature correction device and the engine controller provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An intake air temperature correction method applied to an engine controller includes:
determining the current working condition of the engine;
determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
2. The method of claim 1, wherein said determining a current operating condition of the engine comprises:
acquiring the current rotating speed and the current oil injection quantity of the engine;
and determining the current working condition according to the current rotating speed and the current fuel injection quantity.
3. The method of claim 1, wherein the determining the current amount of heat absorbed by the intake air temperature sensor under the current operating condition comprises:
the corresponding relation between the preset working condition and the absorbed heat is adjusted;
and determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
4. The method of claim 1, wherein said modifying the intake air temperature measured by the intake air temperature sensor based on the current amount of heat absorbed comprises:
calculating the temperature rise of the air inlet temperature sensor according to the current heat absorption quantity;
and taking the difference value between the intake air temperature measured by the intake air temperature sensor and the temperature rise as the actual intake air temperature.
5. An intake air temperature correction device characterized by comprising: the device comprises a first determining module, a second determining module and a correcting module;
the first determination module is used for determining the current working condition of the engine;
the second determining module is used for determining the current absorbed heat of the air inlet temperature sensor under the current working condition, and the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and the correction module is used for correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
6. The apparatus of claim 5, wherein the first determining module is specifically configured to:
acquiring the current rotating speed and the current oil injection quantity of the engine; and determining the current working condition according to the current rotating speed and the current fuel injection quantity.
7. The apparatus of claim 5, wherein the second determining module is specifically configured to:
the corresponding relation between the preset working condition and the absorbed heat is adjusted; and determining the current absorbed heat corresponding to the current working condition according to the corresponding relation.
8. The apparatus of claim 5, wherein the modification module is specifically configured to:
calculating the temperature rise of the air inlet temperature sensor according to the current heat absorption quantity; and taking the difference value between the intake air temperature measured by the intake air temperature sensor and the temperature rise as the actual intake air temperature.
9. An engine controller, comprising: a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute a program stored in the memory, wherein the program is configured to:
determining the current working condition of the engine;
determining the current absorbed heat of the air inlet temperature sensor under the current working condition, wherein the current absorbed heat is used for representing the heat absorbed by the air inlet temperature sensor under the influence of the current heat radiation;
and correcting the intake air temperature measured by the intake air temperature sensor according to the current heat absorption.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711391493.6A CN108104964B (en) | 2017-12-21 | 2017-12-21 | Intake air temperature correction method and device and engine controller |
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| CN201711391493.6A CN108104964B (en) | 2017-12-21 | 2017-12-21 | Intake air temperature correction method and device and engine controller |
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| CN108104964B true CN108104964B (en) | 2020-01-03 |
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| CN109340991B (en) * | 2019-01-04 | 2019-06-28 | 新誉轨道交通科技有限公司 | Air-conditioner temperature acquires modification method, device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN204228287U (en) * | 2014-08-21 | 2015-03-25 | 深圳市敏杰电子科技有限公司 | Thermal radiation resistant NTC temperature sensor |
| CN104827853A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle outdoor environment temperature correction method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3795352B2 (en) * | 2001-07-18 | 2006-07-12 | ユーディナデバイス株式会社 | Temperature control device and temperature control method for semiconductor module |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN204228287U (en) * | 2014-08-21 | 2015-03-25 | 深圳市敏杰电子科技有限公司 | Thermal radiation resistant NTC temperature sensor |
| CN104827853A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle outdoor environment temperature correction method and device |
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