CN110360031A - Engine charge heating means, device, equipment and storage medium - Google Patents
Engine charge heating means, device, equipment and storage medium Download PDFInfo
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- CN110360031A CN110360031A CN201910647897.XA CN201910647897A CN110360031A CN 110360031 A CN110360031 A CN 110360031A CN 201910647897 A CN201910647897 A CN 201910647897A CN 110360031 A CN110360031 A CN 110360031A
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to technical field of engine control, a kind of engine charge heating means, device, equipment and storage medium are disclosed, this method comprises: obtaining the initial temperature and the corresponding device parameter of inlet manifold of heater；The thermal resistance of the inlet manifold is determined according to the device parameter；The temperature slippage of engine water temperature is determined according to the initial temperature and the thermal resistance；Target heating time is obtained according to the temperature slippage, and inlet air heating is carried out according to the target heating time to engine by the heater, to achieve the purpose that the heating time for being precisely controlled heater, so as to avoid the generation of excessive heating phenomena, also ensure that engine has good starting performance.
Description
Technical field
The present invention relates to technical field of engine control more particularly to a kind of engine charge heating means, device, equipment
And storage medium.
Background technique
When diesel engine starts at low ambient temperatures, to guarantee good starting performance, need in entrance combustion chamber
Gas heated.Currently used inlet air heating form has preheating plug and two kinds of air inlet grille grating, wherein preheating plug
Heating means are to be directly protruding into heater plug to heat into combustion chamber, and the power consumption of this heating method is relatively small, adds
The thermal efficiency is higher, but needs to punch in the combustion chamber；Air inlet grille grating heating means, are that air-inlet grille is mounted on inlet manifold
On, when the engine charge caused by being dragged by starter, by the air inspiration combustion chamber of heating, though this heating method
It does not need to punch in the combustion chamber, but power consumption is relatively large, heating efficiency is slightly lower.
And traditional air inlet grille grating method for heating and controlling be according to engine water temperature, when heated between carry out in control table
Interpolation obtains the preheater heating time under current water temperature, when can not be precisely controlled the heating of heater by this method
Between, it is easy to cause air inlet pipeline ablation or storage battery electric quantity consumption excessive, can not guarantee good starting performance.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of engine charge heating means, device, equipment and storage medium,
Aim to solve the problem that the prior art when carrying out inlet air heating to engine, cannot be precisely controlled the heating time of heater, be easy to lead
The problem of causing air inlet pipeline ablation or storage battery electric quantity consumption excessive, can not guarantee good starting performance.
To achieve the above object, the present invention provides a kind of engine charge heating means, the method includes following steps
It is rapid:
Obtain the initial temperature and the corresponding device parameter of inlet manifold of heater；
The thermal resistance of the inlet manifold is determined according to the device parameter；
The temperature slippage of engine water temperature is determined according to the initial temperature and the thermal resistance；
Target heating time is obtained according to the temperature slippage, and passes through the heater to engine according to the mesh
Mark heating time progress inlet air heating.
Preferably, the step of initial temperature for obtaining heater, specifically includes:
The heater on time for obtaining last inlet air heating process calculates the first of the heater according to the following formula
Beginning temperature,
T1=t0*p
In formula, T1For the initial temperature of heater, t0For the heater on time of last inlet air heating process, p is pre-
If coefficient.
Preferably, the device parameter includes the wall thickness, surface area and adiabatic coefficent of the inlet manifold；
It the step of thermal resistance that the inlet manifold is calculated according to the device parameter, specifically includes:
According to the wall thickness, the surface area and the adiabatic coefficent, it is calculated by the following formula the inlet manifold
Thermal resistance,
In formula, R is the thermal resistance of inlet manifold, and h is the wall thickness of inlet manifold, and A is the surface area of inlet manifold, and λ is air inlet
The adiabatic coefficent of manifold.
Preferably, described according to the initial temperature, the step of the thermal resistance calculation temperature slippage, specifically include:
Obtain current environmental temperature, electric time, heater material thermal capacitance and heater quality under engine；
According to the initial temperature, the thermal resistance, the current environmental temperature, the electric time under the engine, it is described plus
Hot equipment material thermal capacitance and the heater quality, are calculated by the following formula temperature slippage,
In formula, dT1For temperature slippage, T1For the initial temperature of heater, T0For current environmental temperature, R is inlet manifold
Thermal resistance, t1For the time electric under engine, C is heater material thermal capacitance, and m is heater quality.
Preferably, it described the step of target heating time is obtained according to the temperature slippage, specifically includes:
When the temperature slippage is greater than target environment temperature, present engine water temperature value is obtained, in preset relation table
It is middle to search the corresponding heater on time of the present engine water temperature value, and using the heater on time found as
Target heating time is closed comprising corresponding between present engine water temperature value and heater on time in the preset relation table
System, the target environment temperature are that the current environmental temperature subtracts the first preset value；
When the temperature slippage is less than or equal to the target environment temperature, it is calculated by the following formula target heating
Time,
In formula, t1For target heating time, dT1For temperature slippage, T1For the initial temperature of heater, p is default system
Number.
Preferably, described when the temperature slippage is greater than target environment temperature, obtain present engine water temperature value
Before step, further includes:
Detect whether the engine is in malfunction；
If so, detecting whether the temperature slippage is greater than target environment temperature；
It is described when the temperature slippage be greater than target environment temperature when, obtain present engine water temperature value the step of, tool
Body includes:
When the temperature slippage is greater than target environment temperature, the temperature value of default dimension is acquired, is replaced by default water temperature
It changes priority policy and chooses a target temperature value from the temperature value of the default dimension as present engine water temperature value.
Preferably, before the step of initial temperature for obtaining heater, the method also includes:
Obtain the present engine water temperature value or current intake manifold temperature value when engine is in power-up state；
When the present engine water temperature value or the current intake manifold temperature value meet preset condition, then institute is executed
The step of stating the initial temperature for obtaining heater；
Wherein, the preset condition are as follows:
The present engine water temperature value is less than the second preset value；
Or, the current intake manifold temperature value is less than the intake manifold temperature value of last heating process record plus the
Three preset values.
In addition, to achieve the above object, the present invention also proposes a kind of air-intake heating mechanism of engine, described device includes:
Parameter acquisition module, the corresponding device parameter of initial temperature and inlet manifold for obtaining heater；
Thermal resistance calculation module, for determining the thermal resistance of the inlet manifold according to the device parameter；
Differential thermal calculation module, for determining that the temperature of engine water temperature declines according to the initial temperature and the thermal resistance
Amount；
Time-obtaining module for obtaining target heating time according to the temperature slippage, and passes through the heater
Inlet air heating is carried out according to the target heating time to engine.
In addition, to achieve the above object, the present invention also proposes a kind of engine charge heating equipment, the equipment includes:
Memory, processor and it is stored in the engine charge heating schedule that can be run on the memory and on the processor,
The step of engine charge heating schedule is arranged for carrying out engine charge heating means as described above.
In addition, to achieve the above object, the present invention also proposes a kind of storage medium, which is characterized in that the storage medium
On be stored with engine charge heating schedule, realized when the engine charge heating schedule is executed by processor as described above
The step of engine charge heating means.
The initial temperature and the corresponding device parameter of inlet manifold that the present invention passes through acquisition heater；It is set according to described
Standby parameter determines the thermal resistance of the inlet manifold；At a temperature of determining engine water temperature according to the initial temperature and the thermal resistance
Drop amount；According to the temperature slippage obtain target heating time, and by the heater to engine according to the target
Heating time carries out inlet air heating, to achieve the purpose that the heating time for being precisely controlled heater, so as to avoid excessive heating
The generation of phenomenon also ensures that engine has good starting performance.
Detailed description of the invention
Fig. 1 is the structural representation of the engine charge heating equipment for the hardware running environment that the embodiment of the present invention is related to
Figure；
Fig. 2 is the flow diagram of inventive engine inlet air heating method first embodiment；
Fig. 3 is the flow diagram of inventive engine inlet air heating method second embodiment；
Fig. 4 is the flow diagram of inventive engine inlet air heating method 3rd embodiment；
Fig. 5 is the structural block diagram of inventive engine air-intake heating mechanism first embodiment.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig.1, Fig. 1 is the engine charge heating equipment for the hardware running environment that the embodiment of the present invention is related to
Structural schematic diagram embodiment.
As shown in Figure 1, the engine charge heating equipment specifically includes that electronic control unit 1001, inlet manifold 1002,
Heater 1003, the components such as urea box (not shown).Wherein, electronic control unit (the Electronic Control
Unit, ECU), also known as " car running computer ", " vehicle-mounted computer ", ECU generally has fault self-diagnosis and defencive function, works as system
When generating failure, it can also automatically record fault code in random access memory (Random Access Memory, RAM)
And read alternative program from intrinsic program using safeguard measure to maintain the operating of engine.The inlet manifold 1002 is to change
The air inlet pipeline before cylinder head air intake duct is arrived after oily device or throttle body, the heater 1003 is with heating effect
Electronic device.
It will be understood by those skilled in the art that structure shown in Fig. 1 is not constituted to engine charge heating equipment
It limits, may include perhaps combining certain components or different component layouts than illustrating more or fewer components.
In engine shown in Fig. 1, the electronic control unit 1001 is mainly used for when engine is run, and acquisition is each
The signal of sensor carries out operation, and the result of operation is changed into control signal, controls the work of controlled device；It is described into
Gas manifold 1002 is mainly used for air, fuel mixture being assigned to each cylinder air intake duct by carburetor or throttle body.
Based on above-mentioned hardware configuration, inventive engine inlet air heating embodiment of the method is proposed.
Referring to Fig. 2, Fig. 2 is a kind of flow diagram of engine charge heating means first embodiment of the present invention.
In the present embodiment, the engine charge heating means the following steps are included:
S10: the initial temperature and the corresponding device parameter of inlet manifold of heater are obtained；
It should be noted that the executing subject of the present embodiment be above-mentioned electronic control unit (ECU), the heater just
Beginning temperature is the Current Temperatures of the heater, the device parameter of the inlet manifold include the inlet manifold wall thickness,
Surface area and adiabatic coefficent.
In the concrete realization, electronic control unit passes through the heater on time for obtaining last inlet air heating process,
The initial temperature of the heater is calculated according to the following formula,
T1=t0*p
In formula, T1For the initial temperature of heater, t0For the heater on time of last inlet air heating process, p is pre-
If coefficient.For example, when the heater on time of last inlet air heating process is 100s, when predetermined coefficient is 0.31, heating
The initial temperature of device is 100 × 0.31=31 DEG C.
It can be readily appreciated that when engine starts for the first time, though adding there is no the last inlet air heating process
The hot device working time, but the heater on time of the last inlet air heating process has been set with preset value when factory.
S20: the thermal resistance of the inlet manifold is determined according to the device parameter；
It should be noted that in the concrete realization, according to the device parameter can determine in several ways it is described into
The thermal resistance of gas manifold, can be according to institute's wall thickness, the surface area and described in the present embodiment for the computational efficiency for improving thermal resistance
Adiabatic coefficent is calculated by the following formula the thermal resistance of the inlet manifold,
In formula, R is the thermal resistance of inlet manifold, and h is the wall thickness of inlet manifold, and A is the surface area of inlet manifold, and λ is air inlet
The adiabatic coefficent of manifold.
Certainly, other modes can be used also to determine the thermal resistance of the inlet manifold, such as: it is logical according to the device parameter
The thermal resistance that look-up table obtains the inlet manifold is crossed, the present embodiment is without restriction to this.
S30: the temperature slippage of engine water temperature is determined according to the initial temperature and the thermal resistance；
In the concrete realization, current environmental temperature, electric time, heater material thermal capacitance and heater matter under engine are obtained
Amount, the current environmental temperature are the room temperature of engine present position, and the electric time is that ECU is waited in low-power under the engine
When machine state, at the time of lower electric timer is recorded, the heater material thermal capacitance be certain substance of unit quality increase or
The heat that decline unit temperature is absorbed or released；
According to the initial temperature, the thermal resistance, the current environmental temperature, the electric time under the engine, it is described plus
Hot equipment material thermal capacitance and the heater quality, are calculated by the following formula temperature slippage,
In formula, dT1For temperature slippage, T1For the initial temperature of heater, T0For current environmental temperature, R is inlet manifold
Thermal resistance, t1For the time electric under engine, C is heater material thermal capacitance, and m is heater quality.For example, working as the initial of heater
Temperature is 31 DEG C, and current environmental temperature is 25 DEG C, and the thermal resistance of inlet manifold is 2 Ω, and the electric time is 10s, heater under engine
Material thermal capacitance is 10J, and when heater quality is 2kg, temperature slippage is ((31-25) * 10)/(2*10/2)=6 DEG C.
S40: target heating time is obtained according to the temperature slippage, and passes through the heater to engine according to institute
State target heating time progress inlet air heating.
It can be readily appreciated that this step combines multiple aggregation of data that target heating time is calculated, it can be more accurately
The target heating time is controlled, air inlet is then carried out according to the target heating time to engine by the heater and is added
Heat gets rid of the prior art merely by engine water temperature come the drawbacks of obtaining heating time.
The initial temperature and the corresponding device parameter of inlet manifold that the embodiment of the present invention passes through acquisition heater；According to
The device parameter determines the thermal resistance of the inlet manifold；Engine water temperature is determined according to the initial temperature and the thermal resistance
Temperature slippage；Target heating time is obtained according to the temperature slippage, and passes through the heater to engine according to institute
Target heating time progress inlet air heating is stated, to achieve the purpose that the heating time for being precisely controlled heater, so as to avoid mistake
The generation for spending heating phenomena also ensures that engine has good starting performance.
With reference to Fig. 3, Fig. 3 is a kind of flow diagram of engine charge heating means second embodiment of the present invention.
Based on above-mentioned first embodiment, the step S40, further includes:
S401: when the temperature slippage is greater than target environment temperature, obtaining present engine water temperature value, closes default
It is that the corresponding heater on time of the present engine water temperature value is searched in table, and the heater on time that will be found
As target heating time, pair between present engine water temperature value and heater on time is included in the preset relation table
It should be related to, the target environment temperature is that the current environmental temperature subtracts the first preset value；
It should be noted that it is described when the temperature slippage is greater than target environment temperature, obtain present engine water
Before the step of temperature value, further includes:
It detects whether the engine is in malfunction, if the engine is in malfunction, detects the temperature
Whether degree slippage is greater than target environment temperature；
Correspondingly, in step S401, when the temperature slippage is greater than target environment temperature, present engine water is obtained
The step of temperature value, specifically includes:
When the temperature slippage is greater than target environment temperature, the temperature value of default dimension is acquired, is replaced by default water temperature
It changes priority policy and chooses a target temperature value from the temperature value of the default dimension as present engine water temperature value, institute
State the temperature value priority policy of default dimension are as follows: intake manifold temperature value, current environmental temperature value and urea box temperature value.
The state of engine can be obtained in time it can be readily appreciated that detecting the engine and whether being in malfunction,
It prevents from causing subsequent step to be unable to operate normally because engine water temperature value can not be obtained in time, engine continuous is heated to overheating
State, or stop heating in advance because engine water temperature value can not be obtained in time, cause water temperature cooling too early, heating is unsuccessfully existing
The generation of elephant, and the generation of above-mentioned phenomenon can be avoided well by this step, for example, when engine breakdown, nothing
Method obtains present engine water temperature value, and temperature slippage has been above the current environmental temperature and subtracts the first preset value at this time,
Intake manifold temperature value is then chosen as present engine water temperature value, if intake manifold temperature value can not also obtain at this time, is selected
Take current environmental temperature value as present engine water temperature value.
It is worth noting that when the temperature slippage is greater than target environment temperature, it at this time can be directly in preset relation
The corresponding heater on time of the present engine water temperature value is searched in table, and the heater on time found is made
For target heating time, inlet air heating then is carried out according to the target heating time to engine, and when on engine water temperature
Be raised to certain temperature then can be used following formula and is heated, to reach when the temperature slippage is greater than target environment temperature
It is precisely controlled the purpose of heating time.
S402: when the temperature slippage is less than or equal to the target environment temperature, it is calculated by the following formula mesh
Heating time is marked,
In formula, t1For target heating time, dT1For temperature slippage, T1For the initial temperature of heater, p is default system
Number.
It can be readily appreciated that when the temperature slippage is less than or equal to the target environment temperature, temperature at this time
Variable quantity is smaller, needs to be accurately controlled target heating time, the target heating time obtained by above-mentioned look-up table
Precision is not enough to achieve the purpose that be precisely controlled heating time, it is therefore desirable to use above-mentioned formula, pass through the synthesis of multidimensional data
It calculates to accurately acquire target heating time, for example, when the initial temperature that temperature slippage is 15 DEG C of heaters is 30 DEG C, in advance
If coefficient is 0.5, then target heating time is (30-15)/0.5=30 seconds.
The embodiment of the present invention is corresponding to different temperature slippages to use different calculation methods, allows ECU more in time
Ground calculates target heating time and takes countermeasure, prevents that air inlet pipeline ablation or storage battery electricity is caused to disappear because excessively heating
Consume the generation of phenomena such as excessive.
With reference to Fig. 4, Fig. 4 is a kind of flow diagram of engine charge heating means 3rd embodiment of the present invention.
Based on above-mentioned first embodiment, before the step S10, further includes:
S00: the present engine water temperature value or current intake manifold temperature value when engine is in power-up state are obtained；
S01: judging whether the present engine water temperature value or the current intake manifold temperature value meet preset condition,
When the present engine water temperature value or the current intake manifold temperature value meet preset condition, then executes described obtain and add
The step of initial temperature of hot device；
It can be readily appreciated that being easy to cause excessive heating phenomena when that cannot be precisely controlled the heating time of heater
Occur, causes the waste of heat energy, for the generation for avoiding the phenomenon, the state of monitor engines in real time is needed, according to hair
Motivational state takes corresponding scheme, and in the present embodiment, the power-up state includes that cold is powered on not start to power on cold and opened
Dynamic state, the cold power on the criterion of not starting state are as follows:
Present engine water temperature value is less than the second preset value；Or, current intake manifold temperature value is heated less than last
The intake manifold temperature value of Cheng Jilu adds third preset value；
Second preset value is the engine water temperature value of last heating process record plus the 4th preset value, or only
For the 5th preset value, the 4th preset value is less than the 5th preset value.For example, when the 4th preset value is 10 DEG C, last time heating
The intake manifold temperature value of process record is 23 DEG C plus third preset value, and the 5th preset value is 50 DEG C, last heating process
The engine water temperature value of record is 15 DEG C, and present engine water temperature value is 30 DEG C, and intake manifold temperature value is 25 DEG C, the air inlet
Although the intake manifold temperature value that manifold value is greater than last heating process record adds third preset value, it is unsatisfactory for inlet manifold
Corresponding criterion, but the engine water temperature is 30 DEG C, and less than 50 DEG C of the 5th preset value, it is corresponding to meet engine water temperature
Criterion is then can determine that at this time to power on not starting state.
Based on similar reason, the criterion of the cold electrifying startup state are as follows:
The present engine water temperature value is greater than the 6th preset value and less than the 5th preset value；Or, the current air inlet discrimination
The intake manifold temperature value that tube temperature angle value is greater than last heating process record adds the 7th preset value.6th preset value is
The engine water temperature value of last heating process record adds the 8th preset value, and described to state the 8th preset value default less than the 5th
Value.
It can be readily appreciated that cold powers on the calculating of the temperature slippage under not starting state and cold electrifying startup state
Method is identical, but target heating time can change with the variation of the data of acquisition, and works as the present engine water temperature value
It is at this time heat engine state when greater than five preset values, and the target heating time in the case of heat engine is 0 second, is reheated at this time, meeting
Lead to the generation of superheating phenomenon, therefore need to detect the state of engine in advance, corresponding heating side is taken according to different states
Case, to achieve the purpose that monitor engines in real time state.
The embodiment of the present invention obtains the initial temperature of heater by judging different engine conditions, and then after progress
Continuous calculating step, and when determining that engine is in heat engine state, then stop heating, avoids the hair of excessive heating phenomena
It is raw, the waste of energy is decreased, has been achieved the purpose that energy-saving.
In addition, the embodiment of the present invention also proposes a kind of storage medium, engine charge is stored on the storage medium and is added
Hot program, the engine charge heating schedule realize engine charge heating means as described above when being executed by processor
The step of.
Inventive engine air-intake heating mechanism first embodiment is proposed based on the above embodiment.
It is the structural block diagram of air-intake heating mechanism of engine of embodiment of the present invention first embodiment referring to Fig. 5, Fig. 5.
In the present embodiment, the air-intake heating mechanism of engine further include:
Parameter acquisition module 10, the corresponding device parameter of initial temperature and inlet manifold for obtaining heater；
Thermal resistance calculation module 20, for determining the thermal resistance of the inlet manifold according to the device parameter；
Differential thermal calculation module 30, for determining that the temperature of engine water temperature declines according to the initial temperature and the thermal resistance
Amount；
Time-obtaining module 40 for obtaining target heating time according to the temperature slippage, and passes through the heating
Device carries out inlet air heating according to the target heating time to engine.
The initial temperature and the corresponding device parameter of inlet manifold that the embodiment of the present invention passes through acquisition heater；According to
The device parameter determines the thermal resistance of the inlet manifold；Engine water temperature is determined according to the initial temperature and the thermal resistance
Temperature slippage；Target heating time is obtained according to the temperature slippage, and passes through the heater to engine according to institute
Target heating time progress inlet air heating is stated, to achieve the purpose that the heating time for being precisely controlled heater, so as to avoid mistake
The generation for spending heating phenomena also ensures that engine has good starting performance.
Based on the above-mentioned air-intake heating mechanism of engine first embodiment of the present invention, inventive energy data acquisition device is proposed
Second embodiment.
In the present embodiment, the parameter acquisition module 10 is also used to obtain the heater of last inlet air heating process
Working time calculates the initial temperature of the heater according to the following formula,
T1=t0*p
In formula, T1For the initial temperature of heater, t0For the heater on time of last inlet air heating process, p is pre-
If coefficient；It is also used to obtain present engine water temperature value or current intake manifold temperature value when engine is in power-up state；
When the present engine water temperature value or the current intake manifold temperature value meet preset condition, then executes described obtain and add
The step of initial temperature of hot device.
Further, the thermal resistance calculation module 20 is also used to according to the wall thickness, the surface area and the insulation
Coefficient is calculated by the following formula the thermal resistance of the inlet manifold,
In formula, R is the thermal resistance of inlet manifold, and h is the wall thickness of inlet manifold, and A is the surface area of inlet manifold, and λ is air inlet
The adiabatic coefficent of manifold.
Further, the differential thermal calculation module 30 is also used to obtain current environmental temperature, the electric time under engine, adds
Hot equipment material thermal capacitance and heater quality, and according to the initial temperature, the thermal resistance, the current environmental temperature, the hair
Electric time, the heater material thermal capacitance and the heater quality, are calculated by the following formula temperature slippage under motivation,
In formula, dT1For temperature slippage, T1For the initial temperature of heater, T0For current environmental temperature, R is inlet manifold
Thermal resistance, t1For the time electric under engine, C is heater material thermal capacitance, and m is heater quality；It is also used to detect described start
Whether machine is in malfunction；If so, detecting whether the temperature slippage is greater than target environment temperature；It is described to work as the temperature
Spend slippage be greater than target environment temperature when, obtain present engine water temperature value the step of, specifically include: when the temperature decline
When amount is greater than target environment temperature, the temperature value of the default dimension of acquisition is replaced priority policy by default water temperature and is preset from described
A target temperature value is chosen in the temperature value of dimension as present engine water temperature value.
Further, the time-obtaining module 40 is also used to when the temperature slippage is greater than target environment temperature,
Present engine water temperature value is obtained, when searching the present engine water temperature value corresponding heater work in preset relation table
Between, and using the heater on time found as target heating time, it include present engine in the preset relation table
Corresponding relationship between water temperature value and heater on time, the target environment temperature are that the current environmental temperature subtracts the
One preset value；When the temperature slippage is less than or equal to the target environment temperature, it is calculated by the following formula target and adds
The hot time,
In formula, t1For target heating time, dT1For temperature slippage, T1For the initial temperature of heater, p is default system
Number.
It is real that the other embodiments or specific implementation of inventive engine air-intake heating mechanism can refer to above-mentioned each method
Example is applied, details are not described herein again.
It should be noted that workflow described above is only schematical, not to protection model of the invention
Enclose composition limit, in practical applications, those skilled in the art can select according to the actual needs part therein or
It all achieves the purpose of the solution of this embodiment, herein with no restrictions.
In addition, it should be noted that, herein, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, article or system including a series of elements are not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or system
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or system including the element.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as read-only memory (Read OnlyMemory, ROM)/RAM, magnetic disk, CD), including some instructions are used so that one
Terminal device (can be mobile phone, computer, server or the network equipment etc.) executes side described in each embodiment of the present invention
Method.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of engine charge heating means, which is characterized in that the described method comprises the following steps:
Obtain the initial temperature and the corresponding device parameter of inlet manifold of heater；
The thermal resistance of the inlet manifold is determined according to the device parameter；
The temperature slippage of engine water temperature is determined according to the initial temperature and the thermal resistance；
Target heating time is obtained according to the temperature slippage, and engine is added according to the target by the heater
The hot time carries out inlet air heating.
2. the method as described in claim 1, which is characterized in that specific to wrap the step of the initial temperature for obtaining heater
It includes:
The heater on time for obtaining last inlet air heating process, calculates the initial temperature of the heater according to the following formula
Degree,
T1=t0*p
In formula, T1For the initial temperature of heater, t0For the heater on time of last inlet air heating process, p is default system
Number.
3. the method as described in claim 1, which is characterized in that the device parameter includes the wall thickness of the inlet manifold, table
Area and adiabatic coefficent；
It the step of thermal resistance that the inlet manifold is calculated according to the device parameter, specifically includes:
According to the wall thickness, the surface area and the adiabatic coefficent, it is calculated by the following formula the heat of the inlet manifold
Resistance,
In formula, R is the thermal resistance of inlet manifold, and h is the wall thickness of inlet manifold, and A is the surface area of inlet manifold, and λ is inlet manifold
Adiabatic coefficent.
4. the method as described in claim 1, which is characterized in that described according to the initial temperature, the thermal resistance calculation temperature
The step of slippage, specifically includes:
Obtain current environmental temperature, electric time, heater material thermal capacitance and heater quality under engine；
According to the initial temperature, the thermal resistance, the current environmental temperature, electric time, the heater under the engine
Material thermal capacitance and the heater quality, are calculated by the following formula temperature slippage,
In formula, dT1For temperature slippage, T1For the initial temperature of heater, T0For current environmental temperature, R is the heat of inlet manifold
Resistance, t1For the time electric under engine, C is heater material thermal capacitance, and m is heater quality.
5. the method as described in claim 1, which is characterized in that described to obtain target heating time according to the temperature slippage
The step of, it specifically includes:
When the temperature slippage is greater than target environment temperature, present engine water temperature value is obtained, is looked into preset relation table
The corresponding heater on time of the present engine water temperature value is looked for, and using the heater on time found as target
Heating time, comprising the corresponding relationship between present engine water temperature value and heater on time in the preset relation table,
The target environment temperature is that the current environmental temperature subtracts the first preset value；
When the temperature slippage is less than or equal to the target environment temperature, when being calculated by the following formula target heating
Between,
In formula, t1For target heating time, dT1For temperature slippage, T1For the initial temperature of heater, p is predetermined coefficient.
6. method as claimed in claim 5, described when the temperature slippage is greater than target environment temperature, current hair is obtained
Before the step of motivation water temperature value, further includes:
Detect whether the engine is in malfunction；
If so, detecting whether the temperature slippage is greater than target environment temperature；
It is described when the temperature slippage is greater than target environment temperature, it is the step of obtaining present engine water temperature value, specific to wrap
It includes:
When the temperature slippage is greater than target environment temperature, the temperature value of default dimension is acquired, it is excellent by default water temperature replacement
First grade strategy chooses a target temperature value as present engine water temperature value from the temperature value of the default dimension.
7. before the step of such as method according to any one of claims 1 to 6, the initial temperature for obtaining heater, institute
State method further include:
Obtain the present engine water temperature value or current intake manifold temperature value when engine is in power-up state；
Judge whether the present engine water temperature value or the current intake manifold temperature value meet preset condition, works as when described
When front engine water temperature value or the current intake manifold temperature value meet preset condition, then the first of the acquisition heater is executed
The step of beginning temperature；
Wherein, the preset condition are as follows:
The present engine water temperature value is less than the second preset value；
Or, the intake manifold temperature value that the current intake manifold temperature value is less than last heating process record is pre- plus third
If value.
8. a kind of air-intake heating mechanism of engine, which is characterized in that described device includes:
Parameter acquisition module, the corresponding device parameter of initial temperature and inlet manifold for obtaining heater；
Thermal resistance calculation module, for determining the thermal resistance of the inlet manifold according to the device parameter；
Differential thermal calculation module, for determining the temperature slippage of engine water temperature according to the initial temperature and the thermal resistance；
Time-obtaining module, for obtaining target heating time according to the temperature slippage, and by the heater to hair
Motivation carries out inlet air heating according to the target heating time.
9. a kind of engine charge heating equipment, which is characterized in that the engine charge heating equipment includes: that electronic control is single
Member and it is stored in the engine charge heating schedule that can be run on the electronic control unit and on the electronic control unit,
The engine charge heating schedule is arranged for carrying out the engine charge heating side as described in any one of claims 1 to 7
The step of method.
10. a kind of storage medium, which is characterized in that be stored with engine charge heating schedule, the hair on the storage medium
Motivation inlet air heating program realizes engine charge heating side as described in any one of claim 1 to 7 when being executed by processor
The step of method.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090430A (en) * | 2021-05-13 | 2021-07-09 | 潍柴动力股份有限公司 | Engine starting control method and device and vehicle |
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