CN110390113A - Vehicle emitted smoke system and method - Google Patents
Vehicle emitted smoke system and method Download PDFInfo
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- CN110390113A CN110390113A CN201810345083.6A CN201810345083A CN110390113A CN 110390113 A CN110390113 A CN 110390113A CN 201810345083 A CN201810345083 A CN 201810345083A CN 110390113 A CN110390113 A CN 110390113A
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- G06F30/20—Design optimisation, verification or simulation
Abstract
The present invention provides a kind of vehicle emitted smoke system and method, including the first input module, the second input module, torque rotary speed computing module, emissions data library module, enquiry module and discharge computing module.First input module is used to input speed and the time of the test cycle of vehicle.Second input module is for inputting vehicle parameter.The torque rotary speed computing module is used to calculate revolving speed and the torque of engine in real time according to the speed of the test cycle and time and the vehicle parameter.The emissions data library module is for arranging and storing vehicle engine bench test emissions data.The enquiry module is for according to the revolving speed, torque and vehicle parameter, real-time query to obtain the emissions data of engine from the vehicle engine bench test emissions data.The discharge computing module is used to calculate the accumulation emissions data of the test cycle in real time according to the emissions data of the engine, and exports the accumulation emissions data.
Description
Technical field
The invention belongs to technical field of vehicle, in particular to a kind of vehicle emitted smoke system and method.
Background technique
Since the discharge of engine is related with several factors, establishes vehicle emitted smoke system and need comprehensive very much
The content of section.Macroscopically, vehicle emitted smoke system is based on engine driving cycle model；On microcosmic, vehicle discharge is pre-
Examining system spans the interdisciplinary studies such as chemistry, thermodynamics, hydrodynamics, Heat Transfer.The software of vehicle emitted smoke system
It is substantially all that vehicle operating condition is simulated according to dynamics of vehicle principle, the vehicle discharge ten thousand for recycling engine bench test to obtain
There are performance data and all kinds of mathematics and statistical method to simulate vehicle discharge.
Current vehicle emitted smoke system relies primarily on this kind of commercial vehicle emitted smoke of CRUI step SE, GT-Drive
System, but these vehicle emitted smoke systems are mainly used for power performance, the forecasting research of fuel economy and engine
With the matching optimization of power train, predicted not for the engine emission that is used for of property.In addition, these vehicle emitted smoke system roots
It is designed according to dynamics of vehicle principle, it is therefore desirable to a large amount of parameter is inputted, such as vehicle parameter (including tire parameter) and engine
Parameter etc., and some parameters are obtained by existing empirical data, and the operation of entire vehicle emitted smoke system and parameter are defeated
Enter operability and versatility troublesome, thus that will affect vehicle emitted smoke system.In addition, this kind of vehicle emitted smoke system
Mode, the content of system mostly have been cured, open low, are difficult further to be developed and deep Study on Emission.
Therefore, it is badly in need of improving existing vehicle emitted smoke system, it can with improve vehicle emitted smoke system
Operability.
Summary of the invention
The purpose of the present invention is to provide a kind of vehicle emitted smoke system and method, to improve vehicle emitted smoke system
With the operability of method.
In order to solve the above technical problems, the present invention provides a kind of vehicle emitted smoke system, comprising: the first input module,
For inputting speed and the time of the test cycle of vehicle；Second input module, for inputting vehicle parameter；Torque rotary speed calculates
Module, for calculating the revolving speed of engine in real time according to the speed of the test cycle and time and the vehicle parameter and turning
Square；Emissions data library module, for arranging and storing vehicle engine bench test emissions data；Enquiry module, for being turned according to described
Speed, torque and the vehicle parameter real-time query from the vehicle engine bench test emissions data obtain the emissions data of engine；With
And number is discharged in discharge computing module, the accumulation for calculating the test cycle in real time according to the emissions data of the engine
According to, and export the accumulation emissions data.
Optionally, the vehicle parameter includes base ratio, gearbox ratio, transfer efficiency and tire radius, the torque
Revolving speed computing module is used to calculate the vehicle in real time according to the speed of the test cycle and time and the vehicle parameter
Running resistance, and for according to the following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
Optionally, the running resistance include the air drag of vehicle, the rolling resistance of vehicle, the acceleration resistance of vehicle with
And the gradient resistance of vehicle, the torque rotary speed computing module includes: the first computing module, for according to the test cycle
Speed and the vehicle parameter calculate the air drag and rolling resistance of vehicle in real time；Second computing module, for according to institute
The speed and the vehicle parameter of stating test cycle calculate the acceleration resistance of vehicle in real time；Third computing module is used for basis
The vehicle parameter calculates the gradient resistance of vehicle in real time；And the 4th computing module, for being hindered according to the air of the vehicle
The conjunction of power, rolling resistance, acceleration resistance and gradient resistance calculates the running resistance of the vehicle in real time, and is used for according to following public
Formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
Optionally, the vehicle parameter further includes rolling resistance equivalent value and coefficient of air resistance equivalent value, and described first
Computing module F according to the following formulaW=a+b μ2The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor vehicle
The sum of air drag and rolling resistance, a are rolling resistance equivalent value, and b is coefficient of air resistance equivalent value, and μ is test cycle
Real-time speed.
Optionally, the vehicle parameter further includes the driving parameters obtained by vehicle sliding test, and described first calculates
Module F according to the following formulaW=A+B μ+C μ2The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor the sky of vehicle
The sum of atmidometer and rolling resistance, A, B, C are the driving parameters that vehicle sliding test obtains, and μ is the real-time speed of test cycle.
Optionally, the emissions data library module includes third input module and data conversion module, the third input
Module is used to the vehicle engine bench test discharging number for inputting vehicle engine bench test emissions data, the data conversion module
According to being converted to vehicle instantaneous emission data and storing, the type of the vehicle engine bench test emissions data is volume fraction data class
Type, the type of the vehicle instantaneous emission data are qualitative data type, and the vehicle instantaneous emission data include multiple groups and turn
Speed, torque and the one-to-one engine emission data of vehicle parameter.
The present invention also provides a kind of vehicle emitted smoke methods, comprising: inputs speed and the time of the test cycle of vehicle；
Input vehicle parameter；Calculate the revolving speed of engine in real time according to the speed of the test cycle and time and the vehicle parameter
And torque；Arrange and store vehicle engine bench test emissions data；According to the revolving speed, torque and vehicle parameter from the vehicle platform
Real-time query obtains the emissions data of engine in frame test emissions data；It is calculated in real time according to the emissions data of the engine
The accumulation emissions data of the test cycle, and export the accumulation emissions data.
Optionally, turning for engine is calculated according to the speed of the test cycle and time and the vehicle parameter in real time
Speed and torque include: the row for calculating the vehicle in real time according to the speed of the test cycle and time and the vehicle parameter
Sail resistance；
Further according to following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
Optionally, the vehicle is calculated according to the speed of the test cycle and time and the vehicle parameter in real time
Running resistance includes: air drag and the rolling for calculating vehicle in real time according to the speed and the vehicle parameter of the test cycle
Dynamic resistance；Calculate the acceleration resistance of vehicle in real time according to the speed of the test cycle and the vehicle parameter；According to described
Vehicle parameter calculates the gradient resistance of vehicle in real time；According to the air drag of the vehicle, rolling resistance, acceleration resistance and ramp
The conjunction of resistance calculates the running resistance of the vehicle in real time.
Optionally, the vehicle parameter includes rolling resistance equivalent value, coefficient of air resistance equivalent value, according to the test
When the speed of circulation and the vehicle parameter calculate the air drag and rolling resistance of vehicle in real time, F according to the following formulaW=
a+bμ2The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor the sum of the air drag of vehicle and rolling resistance, a
For rolling resistance equivalent value, b is coefficient of air resistance equivalent value, and μ is the speed of test cycle.
Optionally, the vehicle parameter includes the driving parameters obtained by vehicle sliding test, is followed according to the test
When the speed of ring and the vehicle parameter calculate the air drag and rolling resistance of vehicle in real time, F according to the following formulaW=A+
Bμ+Cμ2The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor the sum of the air drag of vehicle and rolling resistance,
A, B, C are the driving parameters that vehicle sliding test obtains, and μ is the speed of test cycle.
Optionally, when arranging and storing vehicle engine bench test emissions data, vehicle engine bench test emissions data is first inputted, then
The vehicle engine bench test emissions data is converted into vehicle instantaneous emission data and is stored, the vehicle engine bench test discharges number
According to type be volume fraction data type, the types of the vehicle instantaneous emission data is qualitative data type, the vehicle
Instantaneous emission data include multiple groups and revolving speed, torque and the one-to-one engine emission data of vehicle parameter.
A kind of vehicle emitted smoke system and method provided by the invention, have the advantages that
Turning for engine is calculated in real time according to the speed of the test cycle of input vehicle and time and input vehicle parameter
Speed and torque, and arrange and storage vehicle engine bench test emissions data, and then according to revolving speed, torque and vehicle parameter from vehicle
Real-time query obtains the emissions data of engine in engine bench test emissions data, and real-time according to the emissions data of the engine
The accumulation emissions data of the test cycle is calculated, so that the operability of vehicle emitted smoke system and method can be improved.
Detailed description of the invention
Fig. 1 is the structural block diagram of the vehicle emitted smoke system in an embodiment of the present invention；
Fig. 2 is the vehicle simplified model in an embodiment of the present invention；
Fig. 3 is the flow chart of the vehicle emitted smoke method in an embodiment of the present invention；
Fig. 4 is the flow chart of the vehicle emitted smoke method in an embodiment of the present invention.
Description of symbols:
The first input module of 110-；
The second input module of 120-；
130- torque rotary speed computing module；The first computing module of 131-；The second computing module of 132-；133- third calculates mould
Block；The 4th computing module of 134-；
140- emissions data library module；141- third input module；142- data conversion module；
150- enquiry module；
160- discharges computing module；
210- engine；220- transmission system；230- vehicle body；240- tire；TrRoad.
Specific embodiment
Vehicle emitted smoke system and method proposed by the present invention are made below in conjunction with the drawings and specific embodiments further
It is described in detail.It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to it is convenient,
Lucidly aid in illustrating the purpose of the embodiment of the present invention.
It is the structural block diagram of the vehicle emitted smoke system in an embodiment of the present invention, the vehicle with reference to Fig. 1, Fig. 1
Emitted smoke system includes the first input module 110, the second input module 120, torque rotary speed computing module 130, emissions data
Library module 140, enquiry module 150 and discharge computing module 160.First input module 110 is used to input the test of vehicle
The speed of circulation and time.Second input module 120 is for inputting vehicle parameter.The torque rotary speed computing module 130
For calculating revolving speed and the torque of engine in real time according to the speed of the test cycle and time and the vehicle parameter.Institute
Emissions data library module 140 is stated for arranging and storing vehicle engine bench test emissions data.The enquiry module 150 is used for basis
The revolving speed, torque and the vehicle parameter real-time query from the vehicle engine bench test emissions data obtain the discharge number of engine
According to.The discharge computing module 160 is used to calculate the accumulation of the test cycle in real time according to the emissions data of the engine
Emissions data, and export the accumulation emissions data.
In the present embodiment, the vehicle parameter includes base ratio, gearbox ratio, transfer efficiency and tire radius.It is described
Torque rotary speed computing module 130 is used to calculate institute in real time according to the speed of the test cycle and time and the vehicle parameter
The running resistance of vehicle is stated, and for according to the following formula
The torque of the engine is calculated in real time.Wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.The base ratio, gearbox ratio, conversion effect
Rate and tire radius can be inputted from second input module 120.
Second vehicle parameter can also include other parameters relevant to vehicle, such as complete vehicle quality, tire ginseng
Number, transmission ratio, base ratio, gearbox inertia, engine inertia, vehicle inertia, transmission efficiency and road parameters etc..
With reference to the vehicle simplified model that Fig. 2, Fig. 2 are in an embodiment of the present invention, the vehicle include engine 210,
Transmission system 220, vehicle body 230 and tire 240.Vehicle tire 240 during travelling on road Tr will receive
Rolling resistance, gradient resistance, air drag and acceleration resistance.According to vehicle theory, the per a flash of vehicle in the process of moving
Between, driving force provided by engine 210 is equal to vehicle the sum of various running resistances in the process of moving.I.e. just like downward driving side
Journey:
Ft=Fj+Fa+Fi+Ff (1-2)
In formula: Ft is the driving force that engine provides, FfFor rolling resistance, FaFor air drag, FjFor acceleration resistance, Fi
For gradient resistance.
In the present embodiment, the torque rotary speed computing module 130 includes turning the first computing module 131, the second computing module
132, third computing module 133 and the 4th computing module 134.Described turn of the first computing module 131 is used to be followed according to the test
The speed of ring and the vehicle parameter calculate the air drag and rolling resistance of vehicle in real time.Second computing module 132
Calculate the acceleration resistance of vehicle in real time for the speed and the vehicle parameter according to the test cycle.Specifically, can root
The acceleration resistance of vehicle is calculated according to the speed and complete vehicle quality of the test cycle, vehicle inertia etc..The third calculates mould
Block 133 is used to calculate the gradient resistance of vehicle in real time according to the vehicle parameter.Specifically, can be according to the test cycle vehicle
The acceleration resistance of the calculating vehicle such as quality, vehicle inertia and road parameters.4th computing module 134 is used for according to the vehicle
The conjunction of air drag, rolling resistance, acceleration resistance and gradient resistance calculate the running resistance of the vehicle in real time.Described
Four computing modules 134 are also used to according to the following formula
The torque of the engine is calculated in real time.Wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor the torque of engine.
In the present embodiment, the vehicle parameter further includes rolling resistance equivalent value and coefficient of air resistance equivalent value.It is described
Turn the first computing module 131 according to the following formula
FW=a+b μ2 (1-3)
The air drag and rolling resistance of vehicle are calculated in real time.Wherein, FWFor vehicle air drag and rolling resistance it
It is rolling resistance equivalent value with, a, b is coefficient of air resistance equivalent value, and μ is the real-time speed of test cycle.
Specifically, being generated under 0km/h~120km/h speed by brake apparatus and chassis dynamometer intrinsic friction
Vehicle rolling resistance and air drag and speed there are following relationship,
Fw=a+b μ2 (1-3)
Wherein, FwFor the sum of the air drag of vehicle and rolling resistance, a is rolling resistance equivalent value, and b is air drag system
Number equivalent value, μ is speed.And rolling resistance equivalent value and coefficient of air resistance equivalent value can obtain in relevant regulation file
It takes.In the present embodiment, the rolling resistance equivalent value and coefficient of air resistance equivalent value can be defeated from second input module 120
Enter.
In another embodiment, the air drag of vehicle and rolling resistance can also calculate in other way
It arrives.Specifically, the vehicle parameter further includes the driving parameters obtained by vehicle sliding test.Described turn of the first computing module
131 according to the following formula
FW=A+B μ+C μ2 (1-4)
The air drag and rolling resistance of vehicle are calculated in real time.Wherein, FWFor vehicle air drag and rolling resistance it
With, A, B, C be vehicle sliding test obtain driving parameters, μ be test cycle real-time speed.It can pass through in the present embodiment
Air drag and the rolling of driving parameters and above-mentioned vehicle that the vehicle sliding test inputted from the second input module 120 obtains
Formula between dynamic resistance and speed calculates the air drag and rolling resistance of vehicle.The driving parameters that vehicle sliding test obtains
A, B, C may be from the test data of drum test.The air drag of vehicle is calculated by above-mentioned formula (1-4) and rolling resistance relates to
And vehicle parameter it is less, accurate reliable and practical.
In the present embodiment, the test that the revolving speed of the engine usually passes through the vehicle of the first input module 110 input is followed
The speed of ring and the vehicle parameter of the second input module 120 input calculate the real-time revolving speed of engine.
The emissions data library module 140 includes third input module 141 and data conversion module 142.The third is defeated
Enter module 141 for inputting vehicle engine bench test emissions data.The data conversion module 142 is used to survey the vehicle rack
Examination emissions data is converted to vehicle instantaneous emission data and stores.The type of the vehicle engine bench test emissions data is volume point
Number data type, the type of the vehicle instantaneous emission data are qualitative data type.The vehicle instantaneous emission data include
The emissions data of multiple groups and revolving speed, torque and the one-to-one engine of vehicle parameter.In the vehicle instantaneous emission data
Second parameter can be complete vehicle quality, tire parameter, transmission ratio, base ratio, gearbox inertia, engine inertia, vehicle inertial
Amount, transmission efficiency etc..
Vehicle engine bench test emissions data is the universal characteristic emissions data of vehicle, these universal characteristic emissions datas include
Volume fraction data, such as pollutant account for the volume ratio data of emission, further include mass fraction data, by institute in the present embodiment
It states volume fraction data and is converted to mass fraction data, so that vehicle engine bench test emissions data be made to be unified for mass fraction number
According to convenient for being also convenient for described in the calculating in real time of discharge computing module 160 by the emissions data of the inquiry engine of enquiry module 150
The accumulation emissions data of test cycle, and export the accumulation emissions data.
Specifically, the vehicle engine bench test emissions data includes the volume ratio that pollutant accounts for emission in the present embodiment
Data, vehicle engine bench test emissions data, which is converted to vehicle instantaneous emission data, to be realized by following formula:
Vehicle emitted smoke system can so be effectively improved to the adaptability of various vehicle engine bench test emissions datas, can be changed
The versatility of kind vehicle emitted smoke system.
In the present embodiment, the enquiry module 150 is surveyed according to the revolving speed, torque and vehicle parameter from the vehicle rack
When trying the emissions data of real-time query engine in emissions data, it can be calculated by mapping relations in emissions data library module 140
Method inquires vehicle engine bench test emissions data corresponding with the revolving speed, torque and vehicle parameter, and then obtains engine
Emissions data.
In the present embodiment, first input module 110 can be defeated by inputting the Velocity Time relation curve of test cycle
Enter speed and the time of the test cycle of vehicle.
In the present embodiment, the vehicle parameter that can be inputted by second input module 120 includes but is not limited to following ginseng
Number: base ratio, gearbox ratio, transfer efficiency, tire radius, rolling resistance equivalent value, coefficient of air resistance equivalent value, vehicle
Driving parameters, car body weight and the ramp parameter that coasting test obtains.
The present embodiment also provides a kind of vehicle emitted smoke method.It is in an embodiment of the present invention with reference to Fig. 3, Fig. 3
The flow chart of vehicle emitted smoke method, the vehicle emitted smoke method include:
Step S100 inputs speed and the time of the test cycle of vehicle；
Step S200 inputs vehicle parameter；
Step S300 calculates engine according to the speed of the test cycle and time and the vehicle parameter in real time
Revolving speed and torque；
Step S400 arranges and stores vehicle engine bench test emissions data；
Step S500, it is real-time from the vehicle engine bench test emissions data according to the revolving speed, torque and vehicle parameter
Inquiry obtains the emissions data of engine；
Step S600 calculates the accumulation emissions data of the test cycle according to the emissions data of the engine in real time,
And export the accumulation emissions data.
The step S300 includes:
Step S310 calculates the vehicle according to the speed of the test cycle and time and the vehicle parameter in real time
Running resistance；
Step S320, according to the following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For
Gearbox ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
It is the flow chart of the vehicle emitted smoke method in an embodiment of the present invention with reference to Fig. 4, Fig. 4, in step S310
In, the running resistance for calculating the vehicle in real time includes:
Step S311 calculates the air drag of vehicle according to the speed of the test cycle and the vehicle parameter in real time
And rolling resistance；
Step S312 is hindered according to the acceleration that the speed of the test cycle and the vehicle parameter calculate vehicle in real time
Power；
Step S313 calculates the gradient resistance of vehicle according to the vehicle parameter in real time；
Step S314 is counted in real time according to the conjunction of the air drag of the vehicle, rolling resistance, acceleration resistance and gradient resistance
Calculate the running resistance of the vehicle.
The vehicle parameter inputted in step s 200 includes rolling resistance equivalent value, coefficient of air resistance equivalent value.In step
In rapid S311, when calculating the air drag and rolling resistance of vehicle in real time, according to the following formula
FW=a+b μ2
The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor vehicle air drag and rolling resistance it
It is rolling resistance equivalent value with, a, b is coefficient of air resistance equivalent value, and μ is the speed of test cycle.
In another embodiment, the vehicle parameter inputted in step s 200 includes being obtained by vehicle sliding test
Driving parameters.It, can also be according to the following formula when calculating the air drag and rolling resistance of vehicle in real time in step S311
FW=A+B μ+C μ2
The air drag and rolling resistance of vehicle are calculated in real time, wherein FWFor vehicle air drag and rolling resistance it
With, A, B, C be vehicle sliding test obtain driving parameters, μ be test cycle speed.
The vehicle instantaneous emission data include multiple groups and revolving speed, torque and the one-to-one engine emission of vehicle parameter
Data arrange in step S400 and storage vehicle engine bench test emissions data include:
Step S410 inputs vehicle engine bench test emissions data；
The vehicle engine bench test emissions data is converted to vehicle instantaneous emission data and stored by step S420, described
The type of vehicle engine bench test emissions data is volume fraction data type, and the type of the vehicle instantaneous emission data is quality
Data type.
The method of calculating running resistance in vehicle emitted smoke system and method in the present embodiment can simplify needs
The vehicle parameter of input, has simplified operating process, can accelerate vehicle emitted smoke system operational speed, and it is pre- to improve vehicle discharge
The response speed of examining system, and the operability and versatility of vehicle emitted smoke system can be improved.
Emissions data library module 140 in the present embodiment can effectively improve vehicle emitted smoke system to various vehicle racks
The adaptability for testing emissions data, can improve the versatility of vehicle emitted smoke system.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (12)
1. a kind of vehicle emitted smoke system characterized by comprising
First input module, for inputting speed and the time of the test cycle of vehicle；
Second input module, for inputting vehicle parameter；
Torque rotary speed computing module, for being calculated in real time according to the speed of the test cycle and time and the vehicle parameter
The revolving speed of engine and torque；
Emissions data library module, for arranging and storing vehicle engine bench test emissions data；
Enquiry module, for real-time from the vehicle engine bench test emissions data according to the revolving speed, torque and vehicle parameter
Inquiry obtains the emissions data of engine；And
Computing module is discharged, number is discharged in the accumulation for calculating the test cycle in real time according to the emissions data of the engine
According to, and export the accumulation emissions data.
2. vehicle emitted smoke system as described in claim 1, which is characterized in that the vehicle parameter include base ratio,
Gearbox ratio, transfer efficiency and tire radius, the torque rotary speed computing module be used for according to the speed of the test cycle and
Time and the vehicle parameter calculate the running resistance of the vehicle in real time, and for according to the following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For speed change
Case ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
3. vehicle emitted smoke system as claimed in claim 2, which is characterized in that the running resistance includes the air of vehicle
Resistance, the rolling resistance of vehicle, the gradient resistance of the acceleration resistance of vehicle and vehicle, the torque rotary speed computing module packet
It includes:
First computing module calculates the air of vehicle for the speed and the vehicle parameter according to the test cycle in real time
Resistance and rolling resistance；
Second computing module calculates the acceleration of vehicle for the speed and the vehicle parameter according to the test cycle in real time
Resistance；
Third computing module, for calculating the gradient resistance of vehicle in real time according to the vehicle parameter；And
4th computing module, for real according to the conjunction of the air drag of the vehicle, rolling resistance, acceleration resistance and gradient resistance
When calculate the running resistance of the vehicle, and for according to the following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For speed change
Case ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
4. vehicle emitted smoke system as claimed in claim 3, which is characterized in that the vehicle parameter further includes rolling resistance
Equivalent value and coefficient of air resistance equivalent value, first computing module F according to the following formulaW=a+b μ2Vehicle is calculated in real time
Air drag and rolling resistance, wherein FWFor the sum of the air drag of vehicle and rolling resistance, a is rolling resistance equivalent value, b
For coefficient of air resistance equivalent value, μ is the real-time speed of test cycle.
5. vehicle emitted smoke system as claimed in claim 3, which is characterized in that the vehicle parameter further includes passing through vehicle
The driving parameters that coasting test obtains, first computing module F according to the following formulaW=A+B μ+C μ2Vehicle is calculated in real time
Air drag and rolling resistance, wherein FWFor the sum of the air drag of vehicle and rolling resistance, A, B, C is vehicle sliding test
The driving parameters of acquisition, μ are the real-time speed of test cycle.
6. vehicle emitted smoke system as described in claim 1, which is characterized in that the emissions data library module includes third
Input module and data conversion module, the third input module is for inputting vehicle engine bench test emissions data, the data
Conversion module is for being converted to vehicle instantaneous emission data for the vehicle engine bench test emissions data and storing, the vehicle platform
The type that frame tests emissions data is volume fraction data type, and the type of the vehicle instantaneous emission data is qualitative data class
Type, the vehicle instantaneous emission data include multiple groups and revolving speed, torque and the one-to-one engine emission data of vehicle parameter.
7. a kind of vehicle emitted smoke method characterized by comprising
Input speed and the time of the test cycle of vehicle；
Input vehicle parameter；
Calculate revolving speed and the torque of engine in real time according to the speed of the test cycle and time and the vehicle parameter；
Arrange and store vehicle engine bench test emissions data；
According to the revolving speed, torque and vehicle parameter, real-time query obtains engine from the vehicle engine bench test emissions data
Emissions data；
It calculates the accumulation emissions data of the test cycle in real time according to the emissions data of the engine, and exports the accumulation
Emissions data.
8. vehicle emitted smoke method as claimed in claim 7, which is characterized in that according to the speed of the test cycle and when
Between and the vehicle parameter calculates the revolving speed of engine in real time and torque includes:
Calculate the running resistance of the vehicle in real time according to the speed of the test cycle and time and the vehicle parameter；
Further according to following formula
The torque of the engine is calculated in real time, and wherein Ft is the driving force that engine provides, igFor base ratio, i0For speed change
Case ratio, ηTFor transfer efficiency, r is tire radius, TtqFor motor torque.
9. vehicle emitted smoke method as claimed in claim 8, which is characterized in that according to the speed of the test cycle and when
Between and the vehicle parameter calculate the running resistance of the vehicle in real time and include:
Calculate the air drag and rolling resistance of vehicle in real time according to the speed of the test cycle and the vehicle parameter；
Calculate the acceleration resistance of vehicle in real time according to the speed of the test cycle and the vehicle parameter；
Calculate the gradient resistance of vehicle in real time according to the vehicle parameter；
The vehicle is calculated in real time according to the conjunction of the air drag of the vehicle, rolling resistance, acceleration resistance and gradient resistance
Running resistance.
10. vehicle emitted smoke method as claimed in claim 9, which is characterized in that the vehicle parameter includes rolling resistance
Equivalent value, coefficient of air resistance equivalent value calculate vehicle according to the speed of the test cycle and the vehicle parameter in real time
Air drag and when rolling resistance, F according to the following formulaW=a+b μ2The air drag and rolling resistance of vehicle are calculated in real time,
Wherein, FWFor the sum of the air drag of vehicle and rolling resistance, a is rolling resistance equivalent value, and b is coefficient of air resistance equivalent
Value, μ are the speed of test cycle.
11. vehicle emitted smoke method as claimed in claim 9, which is characterized in that the vehicle parameter includes passing through vehicle
The driving parameters that coasting test obtains, the sky of vehicle is calculated according to the speed of the test cycle and the vehicle parameter in real time
When atmidometer and rolling resistance, F according to the following formulaW=A+B μ+C μ2The air drag and rolling resistance of vehicle are calculated in real time,
In, FWFor the sum of the air drag of vehicle and rolling resistance, A, B, C is the driving parameters that vehicle sliding test obtains, and μ is test
The speed of circulation.
12. vehicle emitted smoke method as claimed in claim 9, which is characterized in that arrange and storage vehicle engine bench test is arranged
When putting data, vehicle engine bench test emissions data is first inputted, then the vehicle engine bench test emissions data is converted into vehicle wink
State emissions data simultaneously stores, and the type of the vehicle engine bench test emissions data is volume fraction data type, the vehicle wink
The type of state emissions data is qualitative data type, and the vehicle instantaneous emission data include multiple groups and revolving speed, torque and vehicle
The one-to-one engine emission data of parameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345083.6A CN110390113B (en) | 2018-04-17 | 2018-04-17 | Vehicle emission prediction system and method |
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