CN110296026B - Method and device for controlling intake air heating - Google Patents
Method and device for controlling intake air heating Download PDFInfo
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- CN110296026B CN110296026B CN201910579060.6A CN201910579060A CN110296026B CN 110296026 B CN110296026 B CN 110296026B CN 201910579060 A CN201910579060 A CN 201910579060A CN 110296026 B CN110296026 B CN 110296026B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000000446 fuel Substances 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 239000000295 fuel oil Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/089—Safety, indicating, or supervising devices relating to engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The application provides a control method and a device for intake air heating, which are applied to an engine control unit, wherein the control method for intake air heating comprises the following steps: recording the working time of the air inlet heater in the current driving cycle in real time in the process of heating the air in the air inlet pipe by the air inlet heater; judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not; and if the working time of the air inlet heater in the current driving cycle is judged to be greater than the time threshold, controlling the air inlet heater to finish the heating work of the air in the air inlet pipe. Because in this application when judging that the operating time of air inlet heater in current driving cycle is greater than the time threshold, can control air inlet heater and end work, avoided heating controller to the air in the intake pipe in a driving cycle heating time overlength, and then also make air inlet heater can not burn out because of the high temperature.
Description
Technical Field
The invention relates to the technical field of electromechanics, in particular to a control method and a control device for intake air heating.
Background
In order to make the fuel more easily ignited in the engine cylinder, it is necessary to heat the air in the engine intake pipe at the time of engine start until the engine is successfully started. After a user powers on the vehicle, the engine control unit determines heating time according to the temperature in the engine and controls the air inlet heater to heat air in the air inlet pipe.
However, when the ambient temperature is low, the engine may not be started successfully after the user performs the power-on operation, and thus the user may repeat the power-on and power-off operations. However, after the user performs the power-off operation, the power is not completely cut off immediately, and the user is still in a state of being powered on to heat the intake air. Therefore, continuous powering up and powering down for multiple times can result in excessive heating time during a driving cycle, causing the intake air heater to burn out due to excessive temperatures. Wherein a driving cycle refers to the process of powering up the vehicle to a complete power down.
Disclosure of Invention
Based on the defects of the prior art, the application provides a control method and a control device for intake air heating, so as to prevent the air in the intake pipe from being heated for too long in one driving cycle.
To solve the above problems, the following solutions are proposed:
the invention discloses a control method of intake air heating, which is applied to an engine control unit and comprises the following steps:
recording the working time of the air inlet heater in the current driving cycle in real time in the heating process of the air inlet heater to the air in the air inlet pipe; wherein the driving cycle is a process of the engine control unit from power-up to power-down;
judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not;
and if the working time of the air inlet heater in the current driving cycle is judged to be greater than the time threshold, controlling the air inlet heater to finish heating the air in the air inlet pipe.
Optionally, the method for controlling intake air heating further includes:
acquiring the temperature acquired by an air inlet temperature sensor in real time; the air inlet temperature sensor is used for collecting the temperature of air in the air inlet pipe;
judging whether the temperature acquired by the air inlet temperature sensor is greater than a temperature threshold value or not;
and if the temperature acquired by the air inlet temperature sensor is judged to be greater than the temperature threshold value, controlling the air inlet heater to finish heating the air in the air inlet pipe.
Optionally, in the above control method for intake air heating, the recording the operating time of the intake air heater in the current driving cycle in real time further includes:
acquiring a lowest temperature value in the engine in real time;
determining the heating time of the air inlet heater for heating the air in the air inlet pipe according to the lowest temperature value in the engine;
and controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
Alternatively, in the above control method for intake air heating, the obtaining the minimum temperature value inside the engine in real time includes:
acquiring the temperature, the coolant temperature, the fuel temperature and the environment temperature collected by an air inlet temperature sensor in the engine in real time;
and determining the minimum value of the temperature, the coolant temperature, the fuel temperature and the environment temperature collected by an air inlet temperature sensor in the engine as the lowest temperature value in the engine.
Optionally, in the above intake air heating control method, after determining that the operation time of the intake air heater in the current driving cycle is greater than the time threshold, the controlling the intake air heater to finish the operation further includes:
controlling a display interface of the vehicle to display alarm information; wherein, the alarm information is used for indicating that the working time of the air inlet heater is greater than the time threshold.
The second aspect of the present invention discloses a control device for intake air heating, which is an engine control unit, and the engine control unit includes:
the recording unit is used for recording the working time of the air inlet heater in the current driving cycle in real time in the heating process of the air inlet heater to the air in the air inlet pipe; wherein the driving cycle is a process of the engine control unit from power-up to power-down;
the first judgment unit is used for judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not;
and the first control unit is used for controlling the air inlet heater to finish heating work of the air in the air inlet pipe if the working time of the air inlet heater in the current driving cycle is judged to be larger than the time threshold.
Optionally, in the above control device for intake air heating, the control device further includes:
the first acquisition unit is used for acquiring the temperature acquired by the air inlet temperature sensor in real time; the air inlet temperature sensor is used for collecting the temperature of air in the air inlet pipe;
the second judgment unit is used for judging whether the temperature acquired by the air inlet temperature sensor is greater than a temperature threshold value or not;
and the second control unit is used for controlling the air inlet heater to finish heating work of the air in the air inlet pipe if the temperature acquired by the air inlet temperature sensor is judged to be greater than the temperature threshold value.
Optionally, in the above control device for intake air heating, the control device further includes:
the second acquisition unit is used for acquiring the lowest temperature value in the engine in real time;
a first determination unit configured to determine a heating time for the intake air heater to heat air in the intake pipe, based on a lowest temperature value inside the engine;
and the third control unit is used for controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
Alternatively, in the above intake air heating control device, the second acquisition unit includes:
the second acquisition subunit is used for acquiring the temperature, the coolant temperature, the fuel temperature and the environment temperature which are acquired by an air inlet temperature sensor in the engine in real time;
and the second determination unit is used for determining the minimum value of the temperature collected by an air inlet temperature sensor in the engine, the temperature of cooling liquid, the temperature of fuel oil and the ambient temperature as the lowest temperature value in the engine.
Optionally, in the above control device for intake air heating, the control device further includes:
the display unit is used for controlling the display of alarm information on a display interface of the vehicle; wherein, the alarm information is used for indicating that the working time of the air inlet heater is greater than the time threshold.
According to the technical scheme, the control method for heating the intake air is applied to the engine control unit, and the working time of the intake air heater in the current driving cycle is recorded in real time in the process that the intake air heater heats the air in the intake pipe. The driving cycle is a process from power-on to power-off of the engine control unit. Judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not; and if the working time of the air inlet heater in the current driving cycle is judged to be greater than the time threshold, controlling the air inlet heater to finish the heating work of the air in the air inlet pipe. Because in this application when judging that the operating time of air inlet heater in current driving cycle is greater than the time threshold, can control air inlet heater and end the heating work to the air in the intake pipe, avoided heating controller to the air in the intake pipe in a driving cycle heating time overlength, and then also make air inlet heater can not burn out because of the high temperature.
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 schematic flow chart illustrating a method for controlling intake air heating according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for heating intake air according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a method for obtaining a minimum temperature value inside an engine according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating another method for controlling intake air heating according to the embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a control device for intake air heating 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 application discloses a control method for intake air heating, which is applied to an engine control unit. The engine control unit is a microcomputer controller of the vehicle and consists of a microprocessor, a memory, an input/output interface, an analog-to-digital converter, a shaping circuit, a driving circuit and other large-scale integrated circuits. This application is through the heating work that admits air of engine control unit control air intake heater, realizes preventing that the air intake heater from heating the time overlength in a driving cycle to the air in the intake pipe.
Specifically, referring to fig. 1, the method for controlling intake air heating disclosed in the embodiment of the present application specifically includes the following steps:
s101, judging whether the air in the air inlet pipe is heated by the air inlet heater or not.
After the engine control unit starts to be electrified, the air inlet heater starts to heat air inlet air in the air inlet pipe according to the heating time calculated by the engine control unit. Wherein the heating time is calculated from the current internal temperature of the engine. When the heating time calculated by the engine control unit is not 0, it is determined that the intake air heater has started heating the air in the intake pipe, and step S102 is executed. If the heating time calculated by the engine control unit is 0, the current internal temperature of the engine meets the starting condition, the air inlet heater does not start to heat the air in the air inlet pipe, and the air inlet heater is not required to heat, so the engine control unit finishes controlling the air inlet heater to heat the air.
Optionally, referring to fig. 2, in an embodiment of the present application, before executing step S102, the method further includes:
s201, acquiring the lowest temperature value in the engine in real time.
The lowest temperature value inside the engine refers to the minimum value of the ambient temperature inside the engine, the temperature of the air at the intake pipe, the coolant temperature, and the ambient temperature. It should be noted that, in addition to the lowest temperature value inside the engine, the step S201 may also obtain a highest temperature value inside the engine, an average temperature value inside the engine, or the like, and determine the time required by the intake air heater to heat the air in the intake pipe according to these temperature parameters.
Optionally, referring to fig. 3, in an embodiment of the present application, an implementation manner of executing step S201 includes:
s301, acquiring the temperature, the coolant temperature, the fuel temperature and the environment temperature collected by an air inlet temperature sensor in the engine in real time.
Wherein, because the temperature of the air inlet heater is higher, in order to avoid damaging the air inlet temperature sensor, the air inlet temperature sensor is arranged at a position with a certain distance from the air inlet heater. The intake air temperature sensor is used to collect the temperature of the air in the intake pipe. It should be noted that, in addition to the temperature parameter mentioned in step S301, other temperature parameters inside the engine may be acquired.
S302, determining the minimum value of the temperature collected by an air inlet temperature sensor in the engine, the temperature of cooling liquid, the temperature of fuel oil and the ambient temperature as the lowest temperature value in the engine.
The engine control unit compares the temperature collected by the air inlet temperature sensor, the temperature of the cooling liquid, the temperature of the fuel and the ambient temperature, and determines the minimum value obtained by comparison as the lowest temperature value in the engine.
S202, determining the heating time of the air in the air inlet pipe by the air inlet heater according to the lowest temperature value in the engine.
Specifically, when step S202 is executed, a table related to heating time is searched for according to the lowest temperature value inside the engine, heating time corresponding to the lowest temperature value inside the engine is searched for, and heating time for heating air in the intake pipe by the intake air heater is determined. Wherein, the table related to the heating time obtains more appropriate heating time under different temperature values according to a plurality of times of experimental data.
In order to make the fuel in the cylinder inside the engine easier to ignite, the temperature inside the engine must reach the temperature value required for cold start of the engine. The heating time obtained in step S202 represents that the engine can reach the cold start requirement after the intake air heater heats the heating time at the current internal minimum temperature value, and the engine is successfully started.
It should be noted that the minimum temperature inside the engine is obtained in real time, and the minimum temperature inside the engine changes in real time as the intake air heater heats the air in the intake pipe or other factors, so the heating time obtained in step S202 changes as the minimum temperature inside the engine changes.
The air in the air inlet pipe is heated by the air inlet heater, and the air inlet heater can be divided into three stages in total: a preheating phase, a waiting starting heating phase and a starting heating phase. The heating time of the preheating phase is determined according to the lowest temperature of the engine interior obtained in step S201, and the heating time of the heating phase waiting for starting and the heating phase in starting is a preset value.
And S203, controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
The heating time is the time for the intake air heater to heat the air in the intake pipe, and is obtained in step S202. And the engine control unit controls the air inlet heater to heat the air in the air inlet pipe according to the heating time duration obtained in the step S202, so that the engine can be successfully started after being heated for the heating time duration. It should be noted that after the engine is successfully started, the air in the intake pipe is no longer heated by the intake heater, and the intake heater does not enter the operating state again until the next driving cycle begins.
And S102, recording the working time of the air inlet heater in the current driving cycle in real time in the process of heating the air in the air inlet pipe by the air inlet heater.
The driving cycle is a process from power-on to power-off of the engine control unit. The end of the driving cycle means that the engine control unit is de-energized. After the engine control unit is powered off, the data such as the working time recorded in step S102 is cleared back to the initial state.
When the air inlet heater starts to heat, the engine control unit starts to record the working time of the air inlet heater in real time. The working time recorded by the engine control unit in real time refers to the total working time of the air intake heater from the power-on time of the engine control unit, namely the starting time of the driving cycle, to the current time. The specific process of controlling the intake air heater to heat the air in the intake pipe by the engine control unit is shown in fig. 2.
S103, judging whether the working time of the air inlet heater in the current driving cycle is larger than a time threshold value.
Wherein the time threshold is a value derived from a plurality of experimental data. Through a plurality of times of experimental data, the risk that the air inlet heater is burnt out after the heating time of the air inlet heater exceeds the time threshold is obtained. Since different intake air heater performances are also different, the time thresholds obtained by the experimental data are also different. The time threshold may be set according to the actual conditions of the engine.
When it is determined in step S103 that the operation time of the intake air heater in the current driving cycle is greater than the time threshold, step S104 is executed. If the working time of the air inlet heater in the current driving cycle is not larger than the time threshold value in the step S103, returning to the step S102, continuously recording the working time of the air inlet heater, not changing the current working state of the air inlet heater, and continuously heating the air in the air inlet pipe by the air inlet heater.
And S104, controlling the air inlet heater to finish heating work of the air in the air inlet pipe.
If the operation time of the intake air heater in the current driving cycle is greater than the time threshold in step S103, it indicates that the heating time of the intake air heater is too long, and the temperature of the intake air heater is high, and the intake air heater may be burned out, or even cause a fire, so the engine control unit controls the intake air heater to end the heating operation of the air in the intake pipe. It should be noted that after the intake air heater is controlled to finish operating, the operation will not be restarted in the current driving cycle, and the operation for heating the air in the intake pipe may not be executed again until the next driving cycle starts and the operation time recorded in step S102 is cleared again.
When a user repeatedly powers on and powers off the engine control unit, the air in the air inlet pipe can be heated as long as the air inlet heater is powered on, and the engine control unit cannot be powered off immediately when the engine control unit is powered off, but the engine control unit can be powered off completely after a response time. Therefore, when the user repeatedly powers on and off for a plurality of times, the engine control unit is in the power-on state all the time and is not powered off, so that the intake air heater is still in a driving cycle and heats the air in the intake pipe for a plurality of times. And this application judges whether the situation of heat time overlength appears through the operating time of record air intake heater in a drive cycle, and then alright prevent the condition that air intake heater burns out because of heat time overlength.
Optionally, in a specific embodiment of the present application, after the step S104 is executed, the method further includes:
and displaying alarm information on a display interface of the vehicle.
The alarm information is used for explaining that the working time of the air inlet heater is greater than a time threshold. Alarm information displayed on the display interface can remind a driver that the air inlet heater is in a state of overlong heating time, and the driver can not repeatedly perform power-on and power-off operation. The specific form of displaying the alarm information is various, and the alarm information can be displaying a pattern or reminding in a text form, and the like. It should be noted that the alarm information is not necessarily displayed on the display interface, and may also be in the form of a voice alarm for the vehicle to remind the driver.
The control method for heating the intake air is applied to an engine control unit, and the working time of the intake air heater in the current driving cycle is recorded in real time in the process that the intake air heater heats the air in the intake pipe. The driving cycle is a process from power-on to power-off of the engine control unit. Judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not; and if the working time of the air inlet heater in the current driving cycle is judged to be greater than the time threshold, controlling the air inlet heater to finish the heating work of the air in the air inlet pipe. Because in this application when judging that the operating time of air inlet heater in current driving cycle is greater than the time threshold, can control air inlet heater and end the heating work to the air in the intake pipe, avoided heating controller to the air in the intake pipe in a driving cycle heating time overlength, and then also make air inlet heater can not burn out because of the high temperature.
Referring to fig. 4, the embodiment of the present application discloses another intake air heating control method, which specifically includes the following steps:
s401, judging whether the air in the air inlet pipe is heated by the air inlet heater or not.
If it is determined that the intake heater starts heating the air in the intake pipe, steps S402 and S405 are executed, and if it is determined that the intake heater does not start heating the air in the intake pipe, the engine control unit ends the control of intake heating of the intake heater.
It should be noted that the execution principle and the process of step S401 are the same as those of step S101 shown in fig. 1, and reference is made to these steps, which are not described herein again.
S402, recording the working time of the air inlet heater in the current driving cycle in real time in the process of heating the air in the air inlet pipe by the air inlet heater.
It should be noted that the execution principle and the process of step S402 are the same as those of step S102 shown in fig. 1, and reference is made to these steps, which are not described herein again.
And S403, judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value.
If the working time of the intake air heater in the current driving cycle is greater than the time threshold, step S404 is executed, and if the working time of the intake air heater in the current driving cycle is not greater than the time threshold, the process returns to step S402.
It should be noted that the execution principle and the process of step S403 are the same as those of step S103 shown in fig. 1, and reference is made to these steps, which are not described herein again.
And S404, controlling the air inlet heater to finish heating work of the air in the air inlet pipe.
It should be noted that the execution principle and the process of step S404 are the same as those of step S104 shown in fig. 1, and reference is made to this step, which is not described herein again.
S405, acquiring the temperature collected by the air inlet temperature sensor in real time.
The intake air temperature sensor is used for collecting the temperature of air in the intake pipe. The higher the temperature value collected by the intake air temperature sensor is, the higher the temperature of the intake air heater is, the more risk of being burnt is shown. Therefore, after the intake air heater has started heating the air in the intake pipe in step S401, the engine control unit needs to acquire the temperature collected by the intake air temperature sensor in real time and monitor the temperature.
It should be noted that the order of executing step S405 and step S402 does not affect the implementation of the embodiment of the present application, and step S405 and step S402 may also be executed simultaneously.
S406, judging whether the temperature collected by the air inlet temperature sensor is larger than a temperature threshold value.
Wherein, the temperature threshold is a preset temperature value. The temperature threshold is obtained by a plurality of experiments, and when the temperature collected by the air inlet temperature sensor is greater than the temperature threshold, the temperature of the air inlet heater is higher, so that the air inlet heater is in danger of being burnt. Therefore, when the step S406 determines that the temperature collected by the intake air temperature sensor is greater than the temperature threshold, the step S407 is executed, and when the step S406 determines that the temperature collected by the intake air temperature sensor is not greater than the temperature threshold, the step S405 is returned to, and the temperature value continues to be acquired.
And S407, controlling the air inlet heater to finish heating work of the air in the air inlet pipe.
If the temperature collected by the intake air temperature sensor is greater than the temperature threshold value in step S406, the engine control unit controls the intake air heater to end the heating operation of the air in the intake pipe in order to prevent the intake air heater from being burnt. It should be noted that after the engine control unit executes step S407, the intake air heater cannot heat up again until the engine control unit is powered off and then powered on again, that is, a new driving cycle is started, so that the air in the intake pipe cannot be heated up again.
The control method for heating the intake air provided by the embodiment of the application is applied to an engine control unit, and when the temperature acquired by the intake air temperature sensor is greater than a temperature threshold value, the intake air heater is controlled to finish heating work on the air in the intake pipe, so that the intake air heater is prevented from being burnt due to overhigh temperature.
Based on the control method for intake air heating disclosed in the above embodiments, the embodiment of the present application further discloses a control device 500 for intake air heating correspondingly, where the control device 500 for intake air heating is an engine control unit, and the control device 500 for intake air heating includes: a recording unit 501, a first judging unit 502, and a first control unit 503.
And the recording unit 501 is used for recording the working time of the intake air heater in the current driving cycle in real time in the process of heating the air in the intake pipe by the intake air heater. The driving cycle is a process from power-on to power-off of the engine control unit.
A first judgment unit 502, configured to judge whether the operation time of the intake air heater in the current driving cycle is greater than a time threshold.
And a first control unit 503, configured to control the intake air heater to end the heating operation of the air in the intake pipe if it is determined that the operation time of the intake air heater in the current driving cycle is greater than the time threshold.
Optionally, in an embodiment of the present application, the control device 500 for intake air heating further includes: the device comprises a first acquisition unit, a second judgment unit and a second control unit.
The first acquisition unit is used for acquiring the temperature acquired by the air inlet temperature sensor in real time. The intake air temperature sensor is used for collecting the temperature of air in the intake pipe.
And the second judgment unit is used for judging whether the temperature acquired by the air inlet temperature sensor is greater than a temperature threshold value or not.
And the second control unit is used for controlling the air inlet heater to finish heating work of the air in the air inlet pipe if the temperature acquired by the air inlet temperature sensor is judged to be greater than the temperature threshold value.
Optionally, in an embodiment of the present application, the control device 500 for intake air heating further includes: the device comprises a second acquisition unit, a first determination unit and a third control unit.
And the second acquisition unit is used for acquiring the lowest temperature value in the engine in real time.
And the first determining unit is used for determining the heating time of the air in the air inlet pipe by the air inlet heater according to the lowest temperature value in the engine.
And the third control unit is used for controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
Optionally, in a specific embodiment of the present application, the second obtaining unit includes: a second acquisition subunit and a second determination unit.
And the second acquisition subunit is used for acquiring the temperature, the coolant temperature, the fuel temperature and the ambient temperature acquired by an air inlet temperature sensor in the engine in real time.
And the second determination unit is used for determining the minimum value of the temperature collected by the air inlet temperature sensor in the engine, the coolant temperature, the fuel temperature and the ambient temperature as the lowest temperature value in the engine.
Optionally, in an embodiment of the present application, the control device 500 for intake air heating further includes:
and the display unit is used for controlling the display interface of the vehicle to display the alarm information. And the alarm information is used for explaining that the working time of the air inlet heater is greater than the time threshold.
The specific principle and implementation procedure of the intake air heating control device disclosed in the embodiment of the present application are the same as those of the intake air heating control method disclosed in the embodiment of the present application, and reference may be made to corresponding parts in the intake air heating control method disclosed in the embodiment of the present application, and details are not repeated here.
The intake air heating control device 500 provided by the application is an engine control unit, and records the working time of an intake air heater in the current driving cycle in real time in the heating process of the intake air heater to the air in an intake pipe through a recording unit 501. The driving cycle is a process from power-on to power-off of the engine control unit. The first determination unit 502 determines whether the operation time of the intake air heater in the current driving cycle is longer than a time threshold. If the first determination unit 502 determines that the operation time of the intake air heater in the current driving cycle is greater than the time threshold, the first control unit 503 controls the intake air heater to end the heating operation of the air in the intake pipe. In the application, when the first judging unit 502 judges that the working time of the air inlet heater in the current driving cycle is greater than the time threshold, the first control unit 503 controls the air inlet heater to finish the heating work of the air in the air inlet pipe, so that the phenomenon that the heating controller heats the air in the air inlet pipe for too long time in one driving cycle is avoided, and the air inlet heater cannot be burnt due to too high temperature is avoided.
Those skilled in the art can make or use the 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 (10)
1. A control method for intake air heating is applied to an engine control unit and comprises the following steps:
after the engine control unit starts to be electrified, the engine control unit calculates heating time according to the current internal temperature of the engine, and the air inlet heater heats air in the air inlet pipe according to the heating time;
recording the working time of the air inlet heater in the current driving cycle in real time in the process of heating the air in the air inlet pipe by the air inlet heater; wherein the driving cycle is a process of the engine control unit from power-up to power-down;
judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not; wherein the time threshold is a numerical value obtained according to experimental data;
and if the working time of the air inlet heater in the current driving cycle is judged to be greater than the time threshold, controlling the air inlet heater to finish heating the air in the air inlet pipe.
2. The method of claim 1, further comprising:
acquiring the temperature acquired by an air inlet temperature sensor in real time; the air inlet temperature sensor is used for collecting the temperature of air in the air inlet pipe;
judging whether the temperature acquired by the air inlet temperature sensor is greater than a temperature threshold value or not;
and if the temperature acquired by the air inlet temperature sensor is judged to be greater than the temperature threshold value, controlling the air inlet heater to finish heating the air in the air inlet pipe.
3. The method of claim 1 or 2, wherein the real-time recording of the operating time of the intake air heater in the current driving cycle is preceded by:
acquiring a lowest temperature value in the engine in real time;
determining the heating time of the air inlet heater for heating the air in the air inlet pipe according to the lowest temperature value in the engine;
and controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
4. The method of claim 3, wherein said obtaining in real time a minimum temperature value inside the engine comprises:
acquiring the temperature, the coolant temperature, the fuel temperature and the environment temperature collected by an air inlet temperature sensor in the engine in real time;
and determining the minimum value of the temperature, the coolant temperature, the fuel temperature and the environment temperature collected by an air inlet temperature sensor in the engine as the lowest temperature value in the engine.
5. The method of claim 1, wherein the determining that the operation time of the intake air heater in the current driving cycle is greater than the time threshold value, after controlling the intake air heater to end the operation, further comprises:
controlling a display interface of the vehicle to display alarm information; wherein, the alarm information is used for indicating that the working time of the air inlet heater is greater than the time threshold.
6. A control device for intake air heating, characterized in that the control device for intake air heating is an engine control unit, the engine control unit comprising:
the recording unit is used for calculating heating time according to the current internal temperature of the engine by the engine control unit after the engine control unit starts to be electrified, and the air in the air inlet pipe is heated by the air inlet heater according to the heating time; recording the working time of the air inlet heater in the current driving cycle in real time in the process of heating the air in the air inlet pipe by the air inlet heater; wherein the driving cycle is a process of the engine control unit from power-up to power-down;
the first judgment unit is used for judging whether the working time of the air inlet heater in the current driving cycle is greater than a time threshold value or not; wherein the time threshold is a numerical value obtained according to experimental data;
and the first control unit is used for controlling the air inlet heater to finish heating work of the air in the air inlet pipe if the working time of the air inlet heater in the current driving cycle is judged to be larger than the time threshold.
7. The apparatus of claim 6, further comprising:
the first acquisition unit is used for acquiring the temperature acquired by the air inlet temperature sensor in real time; the air inlet temperature sensor is used for collecting the temperature of air in the air inlet pipe;
the second judgment unit is used for judging whether the temperature acquired by the air inlet temperature sensor is greater than a temperature threshold value or not;
and the second control unit is used for controlling the air inlet heater to finish heating work of the air in the air inlet pipe if the temperature acquired by the air inlet temperature sensor is judged to be greater than the temperature threshold value.
8. The apparatus of claim 6 or 7, further comprising:
the second acquisition unit is used for acquiring the lowest temperature value in the engine in real time;
a first determination unit configured to determine a heating time for the intake air heater to heat air in the intake pipe, based on a lowest temperature value inside the engine;
and the third control unit is used for controlling the air inlet heater to heat the air in the air inlet pipe according to the heating time.
9. The apparatus of claim 8, wherein the second obtaining unit comprises:
the second acquisition subunit is used for acquiring the temperature, the coolant temperature, the fuel temperature and the environment temperature which are acquired by an air inlet temperature sensor in the engine in real time;
and the second determination unit is used for determining the minimum value of the temperature collected by an air inlet temperature sensor in the engine, the temperature of cooling liquid, the temperature of fuel oil and the ambient temperature as the lowest temperature value in the engine.
10. The apparatus of claim 6, further comprising:
the display unit is used for controlling the display of alarm information on a display interface of the vehicle; wherein, the alarm information is used for indicating that the working time of the air inlet heater is greater than the time threshold.
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| CN201910579060.6A CN110296026B (en) | 2019-06-28 | 2019-06-28 | Method and device for controlling intake air heating |
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| CN201910579060.6A CN110296026B (en) | 2019-06-28 | 2019-06-28 | Method and device for controlling intake air heating |
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| CN102392765A (en) * | 2011-11-08 | 2012-03-28 | 东风汽车公司 | Low-temperature quick start device of engine |
| CN103064401B (en) * | 2012-12-12 | 2014-10-01 | 潍柴动力股份有限公司 | Air inlet heating system fault diagnosis method, controller and system |
| US10221817B2 (en) * | 2016-05-26 | 2019-03-05 | Phillips & Temro Industries Inc. | Intake air heating system for a vehicle |
| CN207263437U (en) * | 2017-09-11 | 2018-04-20 | 西安航空学院 | A kind of multi-fuel automobile cold start charge heating performance detection experimental system |
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