CN106932207B - The vehicle discharge scaling method and system of vehicle - Google Patents
The vehicle discharge scaling method and system of vehicle Download PDFInfo
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- CN106932207B CN106932207B CN201710160856.9A CN201710160856A CN106932207B CN 106932207 B CN106932207 B CN 106932207B CN 201710160856 A CN201710160856 A CN 201710160856A CN 106932207 B CN106932207 B CN 106932207B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
Abstract
A kind of vehicle discharge scaling method and system based on vehicle, the method in one embodiment includes: gas emissions data, air-fuel ratio and the vehicle status parameters obtained during the test that cold start final vacuum pollutant emission trial run recycles under room temperature；Emission data analysis is carried out to the gas emissions data of each subcycle of the operation cycle, determines emission problem subcycle；The air-fuel ratio of period where obtaining the emission problem subcycle；According to the vehicle status parameters of period where the emission problem subcycle, the operating condition type of the emission problem subcycle is determined；Range is differentiated according to the air-fuel ratio, the air-fuel ratio reasonability of the operating condition type of period where the emission problem subcycle, and the control parameter of vehicle discharge is demarcated.The scheme of the present embodiment improves the calibration efficiency of vehicle discharge calibration.
Description
Technical field
The present invention relates to technical field of vehicle, discharge scaling method and system more particularly to a kind of vehicle of vehicle.
Background technique
With the development of automotive engineering, the function of vehicle also constantly enhances, usually by EMS (engine electric-controlled management
System) relevant parameter demarcated, and controlled based on related device of the parameter of calibration to vehicle, to ensure vehicle
Optimised form performance.
And with the raising to environmental requirement, the air pollutants for controlling vehicle discharge in a certain range, also become vehicle
Control staking-out work in an important content.The vehicle discharge calibration work of EMS (engine electric-controlled management system) at present
It makees, is carried out repeatedly on vehicle to nominal data by vehicle calibration engineer working experience abundant, orientation problem point
Adjustment, until meeting engineering objective.This process can only be carried out by the working experience of calibration engineer and technological accumulation, work
Measure cumbersome and low efficiency.
Summary of the invention
Based on this, a kind of vehicle discharge based on vehicle of being designed to provide of the embodiment of the present invention and is at scaling method
System, to improve the efficiency of vehicle discharge calibration.
In order to achieve the above objectives, the embodiment of the present invention uses following technical scheme:
A kind of vehicle discharge scaling method of vehicle, comprising steps of
Obtain the gas discharge number during the test that cold start final vacuum pollutant emission trial run recycles under room temperature
According to, air-fuel ratio and vehicle status parameters；
Emission data analysis is carried out to the gas emissions data of each subcycle of the operation cycle, determines that discharge is asked
Inscribe subcycle；
The air-fuel ratio of period where obtaining the emission problem subcycle；
According to the vehicle status parameters of period where the emission problem subcycle, the emission problem subcycle is determined
Operating condition type；
Sentenced according to air-fuel ratio, the air-fuel ratio reasonability of the operating condition type of period where the emission problem subcycle
Other range demarcates the control parameter of vehicle discharge.
A kind of vehicle discharge calibration system of vehicle, comprising:
Data obtaining module, for obtaining the test that cold start final vacuum pollutant emission trial run recycles under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters in journey；
Positioning problems module, the gas emissions data for each subcycle to the operation cycle carry out discharge number
According to analysis, emission problem subcycle is determined；
Air/fuel ratio determination module, the air-fuel ratio for the period where obtaining the emission problem subcycle；
Operating condition determination type module, for the vehicle status parameters according to the period where the emission problem subcycle,
Determine the operating condition type of the emission problem subcycle；
Demarcating module, for according to the air-fuel ratio of period where the emission problem subcycle, the operating condition type
Air-fuel ratio reasonability differentiates range, demarcates to the control parameter of vehicle discharge.
Based on the scheme of embodiment as described above, followed based on cold start final vacuum pollutant emission trial run under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters during the test of ring, to the institute of each subcycle of operation cycle
It states gas emissions data and carries out Emission data analysis, determine emission problem subcycle, and based on where emission problem subcycle
The vehicle status parameters of period determine the operating condition type of emission problem subcycle, then according to where emission problem subcycle
The air-fuel ratio of period, the air-fuel ratio reasonability of the operating condition type differentiate range, demarcate to the control parameter of vehicle discharge,
It improves vehicle discharge by automatically analyzing to emissions data, orienting emission problem subcycle and carrying out automatic Calibration
The calibration efficiency of calibration.
Detailed description of the invention
Fig. 1 is the flow diagram of the vehicle discharge scaling method of the vehicle in one embodiment；
Fig. 2 is the flow diagram of vehicle discharge scaling method in a specific example；
Fig. 3 is the schematic diagram of the subcycle division mode of NEDC operation cycle in a specific example；
Fig. 4 is the structural schematic diagram of the vehicle discharge calibration system of the vehicle in one embodiment；
Fig. 5 is the structural schematic diagram of the problems in specific example locating module；
Fig. 6 is the structural schematic diagram of the operating condition determination type module in a specific example；
Fig. 7 is the structural schematic diagram of the demarcating module in a specific example.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
The flow diagram of the vehicle discharge scaling method of the vehicle in one embodiment is shown in Fig. 1.Such as Fig. 1 institute
Show, the vehicle discharge scaling method of the vehicle in the embodiment includes:
Step S101: the gas during the test that cold start final vacuum pollutant emission trial run recycles under room temperature is obtained
Body emissions data, air-fuel ratio and vehicle status parameters；
Step S102: carrying out Emission data analysis to the gas emissions data of each subcycle of the operation cycle,
Determine emission problem subcycle；
Step S103: the air-fuel ratio of period where obtaining the emission problem subcycle；
Step S104: according to the vehicle status parameters of period where the emission problem subcycle, the discharge is determined
The operating condition type of problem subcycle；
Step S105: according to air-fuel ratio, the air-fuel of the operating condition type of period where the emission problem subcycle
Range is differentiated than reasonability, and the control parameter of vehicle discharge is demarcated.
Based on the scheme of embodiment as described above, followed based on cold start final vacuum pollutant emission trial run under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters during the test of ring, to the institute of each subcycle of operation cycle
It states gas emissions data and carries out Emission data analysis, determine emission problem subcycle, and based on where emission problem subcycle
The vehicle status parameters of period determine the operating condition type of emission problem subcycle, then according to where emission problem subcycle
The air-fuel ratio of period, the air-fuel ratio reasonability of the operating condition type differentiate range, demarcate to the control parameter of vehicle discharge,
It improves vehicle discharge by automatically analyzing to emissions data, orienting emission problem subcycle and carrying out automatic Calibration
The calibration efficiency of calibration.
In a specific example, discharged in the gas emissions data of each subcycle to the operation cycle
Data analysis, when determining emission problem subcycle, specific used mode can carry out in the following way:
From the gas emissions data during test, the gas emissions data of each subcycle, the gas discharge are obtained
Data include the discharge amount of each gas type of each subcycle and the concentration of emission value of each gas type；
Exceed the discharge thresholding of the gas type of the subcycle in the discharge amount of any one gas type of subcycle
When value, which is determined as initial alignment subcycle；
Exceed the initial alignment subcycle in the concentration of emission value of any one gas type of initial alignment subcycle
When the concentration of emission limit value of the gas type, which is determined as the emission problem subcycle.
Wherein, the discharge threshold value of the gas type of the subcycle whether is exceeded in the discharge amount for determining gas type
When, for the discharge gas of gas with various type, corresponding discharge threshold value can difference.In addition, being directed to same gas
The discharge gas of type, the concentration of emission limit value of each subcycle of operation cycle can also be different, specific each son
The concentration of emission limit value of circulation can be after being split based on concentration of emission limit value demand, be divided into each subcycle.
Above-mentioned vehicle status parameters can be configured in conjunction with actual needs, in a specific example, vehicle-state ginseng
Number may include: accelerator open degree, accelerator open degree change rate, gear, speed, acceleration.
Accordingly, where according to emission problem subcycle the period vehicle status parameters, determine emission problem
When the operating condition type of circulation, the mode in a specific example be may is that
When speed is 0, accelerator open degree 0 and gear are neutral gear, the operating condition type of the emission problem subcycle is determined
For idling operation；
It is not that neutral gear, accelerator open degree are greater than 0, accelerator open degree change rate and are greater than 0 and less than 100% and acceleration in gear
When greater than 0, determine that the operating condition type of the emission problem subcycle is accelerating mode；
Gear be not neutral gear, speed be not 0 and accelerator open degree be 0 when, determine the operating condition of the emission problem subcycle
Type is decelerating mode；
When acceleration is 0, gear is neutral gear and accelerator open degree is not 0, the operating condition of the emission problem subcycle is determined
Type is at the uniform velocity operating condition.
On this basis, the air-fuel ratio, the operating condition type of period where according to the emission problem subcycle
Air-fuel ratio reasonability differentiates range, and when demarcating to the control parameter of vehicle discharge, mode in a specific example can be with
It is as described below.
When operating condition type is accelerating mode or decelerating mode, if the air-fuel ratio of period where emission problem subcycle
Range lower limit threshold value is differentiated less than the air-fuel ratio reasonability of accelerating mode or decelerating mode, then is reduced according to the first concentration step-length
The concentration of distributive value when vehicle accelerates or slows down, if the air-fuel ratio of period where emission problem subcycle, which is greater than, accelerates work
Condition or the air-fuel ratio reasonability of decelerating mode differentiate range limit threshold value, then according to the second concentration step-length increase vehicle accelerate or
The concentration of distributive value when person is slowed down.
Wherein, the first concentration step-length can be set as fixed value, in order to further increase efficiency, can also be asked according to discharge
The air-fuel ratio of period where inscribing subcycle and the air-fuel ratio reasonability of accelerating mode or decelerating mode differentiate range lower limit threshold
The deviation range of value determines.Similarly, the second concentration step-length can be set as fixed value, can also in order to further increase efficiency
To be sentenced according to the air-fuel ratio of period where emission problem subcycle and the air-fuel ratio reasonability of accelerating mode or decelerating mode
The deviation range of other range limit threshold value determines.
When the operating condition type is idling operation or at the uniform velocity operating condition, if the sky of period where emission problem subcycle
Combustion differentiates range lower limit threshold value than being less than the air-fuel ratio reasonability of idling operation or at the uniform velocity operating condition, then with first voltage step-length drop
The reference voltage value of low preceding lambda sensor；If the air-fuel ratio of period is greater than idling operation or even where emission problem subcycle
The air-fuel ratio reasonability of fast operating condition differentiates range limit threshold value, then the reference voltage of lambda sensor before being improved with second voltage step-length
Value.
Wherein, first voltage step-length can be set as fixed value, in order to further increase efficiency, can also be asked according to discharge
The air-fuel ratio reasonability of the air-fuel ratio of period and idling operation or at the uniform velocity operating condition where inscribing subcycle differentiates range lower limit threshold
The deviation range of value determines.Similarly, second voltage step-length can be set as fixed value, can also in order to further increase efficiency
With reasonable according to the air-fuel ratio of period where emission problem subcycle and the air-fuel ratio of the idling operation or at the uniform velocity operating condition
Property differentiate range limit threshold value deviation range determine.
In above-mentioned each exemplary explanation, be to determine emission problem subcycle after, it is thus necessary to determine that emission problem follows
It is illustrated for the operating condition type of ring.It further include a spy having in addition to above-mentioned operating condition during actual operation cycle
Different subcycle, the i.e. beginning of the test of operation cycle a period are referred to as test initial stage in the present embodiment
Circulation.
Wherein, the test initial stage subcycle be above-mentioned test process starting process first time period, this first when
Between section be usually 11 seconds.Certainly, in conjunction with the difference of the type of vehicle of actual test, what which can also be different is set
It sets.
In the test initial stage subcycle, including there are two types of processes: idling process after starting process and starting.Its
In, starting process is to be more than or equal to default starting from engine speed in the first time period of test process starting process
The first time point of revolving speed, until after first time point, engine speed be less than or equal to the of static object revolving speed for the first time
Test process between two time points, i.e., the process of above-mentioned first time point and the second time point.Idling process is upper after starting
It states in first time period, the test process between third time point from after above-mentioned second time point to speed greater than 0.
Accordingly, emissions data point is carried out in the gas emissions data of above-mentioned each subcycle to the operation cycle
Analysis, after determining emission problem subcycle, however, it is determined that emission problem subcycle be test initial stage subcycle, then based on being adopted
The vehicle status parameters of collection, mainly include above-mentioned engine speed, speed, determine above-mentioned first time point, the second time point,
Third time point, and determine therefrom that out idling mistake after the time range for testing the starting process in initial stage subcycle, starting
The time range of journey.
After determining the starting process in test initial stage subcycle, starting after the time range of idling process, base
In the air-fuel ratio data of acquisition, determine air-fuel ratio in the time range of starting process, after starting idling process time model
The air-fuel ratio enclosed, and by the air-fuel ratio reasonability of air-fuel ratio and start-up course in the time range of starting process differentiate range into
Row compares, and the air-fuel ratio reasonability of idling process after the air-fuel ratio and starting of the time range of idling process after starting is differentiated model
It encloses and is compared, determine the operating condition type of emission problem subcycle, be idling process after starting process still starts.
Wherein, due to not yet entering air-fuel ratio closed-loop control in test initial stage subcycle intrinsic motivation, it is arranging
Put problem subcycle be the test initial stage subcycle when, the air-fuel of period where according to the emission problem subcycle
Air-fuel ratio reasonability than, the operating condition type differentiates range, when demarcating to the control parameter of vehicle discharge, if operating condition
Type is starting process, then can be adjusted to the concentration of distributive value.For example, starting if the air-fuel ratio of starting process is less than
The air-fuel ratio reasonability of journey differentiates that the air-fuel ratio reasonability of range differentiates range lower limit threshold value, then reduces according to the first concentration step-length
The concentration of distributive value when vehicle accelerates or slows down, if the air-fuel ratio of starting process is greater than the air-fuel ratio reasonability of start-up course
Differentiate that the air-fuel ratio reasonability of range differentiates range limit threshold value, then increases vehicle according to the second concentration step-length and accelerate or slow down
When distributive value concentration.
Similarly, it if operating condition type is idling process after starting, can also be handled by a similar method.That is: if
The air-fuel ratio of idling process differentiates the air-fuel ratio reasonability of range less than the air-fuel ratio reasonability of idling process after starting after starting
Differentiate range lower limit threshold value, then the concentration of distributive value when vehicle accelerates or slows down is reduced according to the first concentration step-length, if opening
The air-fuel ratio of idling process differentiates that the air-fuel ratio reasonability of range is sentenced greater than the air-fuel ratio reasonability of idling process after starting after dynamic
Other range limit threshold value then increases the concentration of distributive value when vehicle accelerates or slows down according to the second concentration step-length.
Wherein, which can be set as fixed value, can also be according to discharge in order to further increase efficiency
After the air-fuel ratio and starting process or starting of period where problem subcycle (idling process after starting process or starting)
The air-fuel ratio reasonability of idling process differentiates that the deviation range of range lower limit threshold value determines.Similarly, the second concentration step-length can be with
Be set as fixed value, in order to further increase efficiency, can also according to the period where emission problem subcycle (starting process or
Person starting after idling process) air-fuel ratio and starting process or starting after idling process air-fuel ratio reasonability differentiate range on
The deviation range for limiting threshold value determines.
Based on the scheme in embodiment as described above, it is illustrated below in conjunction with a specific example.Show in Fig. 2
The flow diagram of vehicle discharge scaling method in a specific example is gone out.
In the specific example, (test of I type) NEDC (New is tested with cold start final vacuum pollutant emission under room temperature
Europe Driving Cycle) it is illustrated for operation cycle.NEDC is (Urban Driving Cycle, the city UDC
State of cyclic operation) and EUDC (Extra Urban Driving Cycle, suburbs state of cyclic operation).NEDC operation cycle is by being by 1
Portion's (urban district operation cycle) and 2 (suburbs operation cycle) compositions, duration total 1180s.The NEDC operation cycle when
Between in section, multiple subcycles can be divided into.The subcycle that NEDC operation cycle in a specific example is shown in Fig. 3 divides
The schematic diagram of mode.It is appreciated that test initial stage that the beginning of the test of operation cycle is not shown follows in shown in Fig. 3
Ring, i.e., the first time period (such as 11 seconds) of above-mentioned test process starting process, shown in Fig. 3 in be from after the 11st second when
Between section partition process.
As shown in figure 3, in the subcycle division mode, 1180 seconds NEDC operation cycle, by 4 195 seconds groups
At urban district operation cycle and 1 480 seconds suburbs operation cycle composition.Therefore, when being divided to subcycle, Ke Yiju
This carries out the division of subcycle, and specific division mode can be set in conjunction with actual techniques needs.In following exemplary explanations
In, it is to be illustrated for 1180 seconds NEDC operation cycles are divided into 3 subcycles, specifically include: one of them is
It is known as circulation A from subcycle in the 0th second to the 195th second, following examples；Another is followed for the son from the 195th second to the 700th second
Ring, is known as circulation B in following examples, and third is is known as recycling from subcycle in the 700th second to the 1180th second, following examples
C。
It, can be further by the emission limit of NEDC after NEDC Emission test cycle is decomposed into 3 sub- circulation As, B, C
It is also allocated to each subcycle.
At normal temperature in cold start final vacuum pollutant emission test (test of I type), by taking first kind vehicle as an example, discharge limit
Value is generally as follows shown in table 1.
Table 1
In table 1, first kind vehicle refers to including operating seat, seating capacity is no more than six and Maximum total mass is no more than
2500 kilograms of M1 class automobile, M1 class vehicle refers to including operating seat, seating capacity is no more than nine passenger cars.CO is
Carbon monoxide, THC be it is hydrocarbon, NMHC be non-methane it is hydrocarbon, NOXFor nitrogen oxides.
After the emission limit of NEDC is distributed to each subcycle, for the discharge threshold value of each subcycle of discharge amount
Setting can be as shown in table 2 below.
2 test cycle of table decomposes and pollutant discharge amount limit value accounting
On the other hand, after the emission limit of NEDC is distributed to each subcycle, for each subcycle of concentration of emission
The setting of discharge threshold value can be as shown in table 3 below.
3 test cycle of table and Pollutant emission concentration limit value
Vehicle is carried out on the basis of the above and discharges calibration process, is started cold start final vacuum pollutant emission at normal temperature and is tried
The process for testing (test of I type) acquires and obtains the test that cold start final vacuum pollutant emission trial run recycles under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters in journey.Wherein above-mentioned gas emissions data, air-fuel ratio and vehicle
State parameter can be acquired using any possible mode, such as pass through emission analyzer second gas production body emissions data.
In a specific example, which can be discharge amount including each gas type, each gas
The concentration of emission of type, gas type here may include: CO, THC, NMHC, NOX.Here vehicle status parameters can be with
Including accelerator open degree, accelerator open degree change rate, gear, speed and acceleration.
After acquiring and obtaining above-mentioned gas emissions data, each gas type of each subcycle of above-mentioned division is obtained
Gas emissions data, and above-mentioned table 2 is referred to, by the discharge amount of the gas type of each subcycle gas class corresponding to the subcycle
The discharge threshold value of type is compared.If the discharge amount of each gas type of each subcycle is corresponding without departing from the subcycle
The discharge threshold value of gas type then illustrates discharge amount within the scope of the discharge amount set, and vehicle can be according to having demarcated
The control parameter work of good vehicle discharge.
If the discharge door of the gas type of the discharge amount of some gas type of some subcycle beyond the subcycle
The subcycle is then determined as initial alignment subcycle by limit value.In conjunction with shown in table 2, it is assumed that the discharge amount for recycling the CO of B is greater than
0.21, then circulation B can be determined as initial alignment subcycle.
Then, the concentration of emission of each gas type of each initial alignment subcycle is obtained, and in some initial alignment
When the concentration of emission of one gas type of circulation exceeds the concentration of emission limit value of the gas type of the initial alignment subcycle,
The initial alignment subcycle is determined as problem subcycle, that is, determines emission problem point.
Due to NEDC test cycle mainly by starting, idling, acceleration, at the uniform velocity form with decelerating mode, on state of starting operating is
The operating condition of test initial stage subcycle is stated, therefore subsequent by can be divided according to this five kinds of operating conditions.
If the emission problem subcycle is test initial stage subcycle, i.e. state of starting operating, then it may further determine that category
Which process in the state of starting operating.
Vehicle status parameters collected are primarily based on, includes mainly above-mentioned engine speed, speed, determines test process
In the first time period (above-mentioned 11 seconds) of starting process, it is more than or equal to default starting revolving speed (such as 200 from engine speed
Revolution per second) first time point T1, until after first time point T1, engine speed for the first time less than or equal to static object turn
Second time point T2 of speed is greater than to speed 0 third time point T3 from after above-mentioned second time point T2, then by above-mentioned the
The process of period between one time point T1 and the second time point T2 is determined as starting process, from above-mentioned second time point T2
Process to the period of third time point T3 is determined as idling process after starting.
After determining the starting process in test initial stage subcycle, starting after the time range of idling process, base
In the air-fuel ratio data of acquisition, determine air-fuel ratio in the time range of starting process, after starting idling process time model
The air-fuel ratio enclosed, and by the air-fuel ratio reasonability of air-fuel ratio and start-up course in the time range of starting process differentiate range into
Row compares, and the air-fuel ratio reasonability of idling process after the air-fuel ratio and starting of the time range of idling process after starting is differentiated model
It encloses and is compared, determine the operating condition type of emission problem subcycle, be idling process after starting process still starts.
Since in test initial stage subcycle, engine does not simultaneously enter air-fuel ratio closed-loop control, and therefore, one is specifically shown
The air-fuel ratio limits of test initial stage subcycle in example can be as shown in table 4 below, which includes
The air-fuel ratio limits of idling process after the air-fuel ratio limits and starting of starting process.
The air-fuel ratio limits of 4 specific cycle A1 of table
| Operating condition | Starting process | Idling process after starting |
| Air-fuel ratio | 0.7≤λmin≤0.8 | 0.98≤λ≤1.02 |
In upper table 4, λ indicates air-fuel ratio, λminIndicate the minimum value of air-fuel ratio.
Then can be based on the air-fuel ratio in the test initial stage subcycle, and air-fuel ratio shown in table 4 as above limits
It is worth range, the control parameter of vehicle discharge is demarcated.Specific calibration mode can be using any possible mode into
Row, for example, if the air-fuel ratio reasonability that the air-fuel ratio of starting process is less than starting process differentiates that the air-fuel ratio reasonability of range is sentenced
Other range lower limit threshold value then reduces the concentration of distributive value when vehicle accelerates or slows down, if starting according to the first concentration step-length
The air-fuel ratio reasonability that the air-fuel ratio of process is greater than starting process differentiates that the air-fuel ratio reasonability of range differentiates range limit threshold value,
Then increase the concentration of distributive value when vehicle accelerates or slows down according to the second concentration step-length.Similarly, if starting after idling mistake
The air-fuel ratio of journey differentiates that the air-fuel ratio reasonability of range differentiates range lower limit less than the air-fuel ratio reasonability of idling process after starting
Threshold value then reduces the concentration of distributive value when vehicle accelerates or slows down, if idling process after starting according to the first concentration step-length
Air-fuel ratio be greater than starting after idling process air-fuel ratio reasonability differentiate range air-fuel ratio reasonability differentiate range limit threshold
Value then increases the concentration of distributive value when vehicle accelerates or slows down according to the second concentration step-length.
Wherein, the first concentration step-length, the second concentration step-length can be set as fixed value, in order to further increase efficiency,
Can also respectively according to place period (starting process or starting after idling process) air-fuel ratio and starting process or
The air-fuel ratio reasonability of idling process differentiates that range lower limit threshold value, air-fuel ratio reasonability differentiate the inclined of range limit threshold value after starting
Poor range determines.
If above-mentioned emission problem subcycle is not test initial stage subcycle, the mode of operating condition type identification can be
As described below；
When speed is 0, accelerator open degree 0 and gear are neutral gear, the operating condition type of the emission problem subcycle is determined
For idling operation；
It is not that neutral gear, accelerator open degree are greater than 0, accelerator open degree change rate and are greater than 0 and less than 100% and acceleration in gear
When greater than 0, determine that the operating condition type of the emission problem subcycle is accelerating mode；
Gear be not neutral gear, speed be not 0 and accelerator open degree be 0 when, determine the operating condition of the emission problem subcycle
Type is decelerating mode；
When acceleration is 0, gear is neutral gear and accelerator open degree is not 0, the operating condition of the emission problem subcycle is determined
Type is at the uniform velocity operating condition.
For idling, acceleration, at the uniform velocity and decelerating mode, different air-fuel ratio limits can be set, one specific
It is idling, acceleration in example, at the uniform velocity as shown in table 5 below with the air-fuel ratio limits of decelerating mode.
Each operating condition air-fuel ratio limits of table 5
Wherein, λ indicates air-fuel ratio.
It then, can be according to air-fuel ratio, the air-fuel of the operating condition type of period where the emission problem subcycle
Range is differentiated than reasonability, the control parameter of vehicle discharge is demarcated, the mode in a specific example can be as follows
It is described.
When operating condition type is accelerating mode or decelerating mode, if the air-fuel ratio of period where emission problem subcycle
Range lower limit threshold value (as shown in table 5 0.95) is differentiated less than the air-fuel ratio reasonability of accelerating mode or decelerating mode, then is pressed
The concentration that distributive value when vehicle accelerates or slows down is reduced according to the first concentration step-length, if the period where emission problem subcycle
Air-fuel ratio be greater than the air-fuel ratio reasonability of accelerating mode or decelerating mode and differentiate range limit threshold value (as shown in table 5 1),
Then increase the concentration of distributive value when vehicle accelerates or slows down according to the second concentration step-length.
Wherein, the first concentration step-length, the second concentration step-length can be set as fixed value, and the first concentration step-length, second dense
Degree step-length can be set as identical value.
On the other hand, in order to further increase calibration efficiency, the first concentration step-length (the second concentration step-length) can also basis
Under the air-fuel ratio and accelerating mode or decelerating mode of period where emission problem subcycle (on) limit the deviation model of threshold value
Enclose determination.By taking the first concentration step-length, the second concentration step size settings are identical value as an example, deviation range is based in a specific example
Determine that the first concentration step-length, the mode of the second concentration step-length are as shown in table 6 below.
Table 6
| Departure degree | 5%≤deviation≤20% | 20%≤deviation≤60% | 60%≤deviation |
| Thinning/enriching | 5% | 10% | 20% |
The operating condition of idling/at the uniform velocity
When operating condition type is idling operation or at the uniform velocity operating condition, if the air-fuel ratio of period where emission problem subcycle
Differentiate range lower limit threshold value (as shown in table 5 0.98) less than the air-fuel ratio reasonability of idling operation or at the uniform velocity operating condition, then with
The reference voltage value of lambda sensor before first voltage step-length reduces；If the air-fuel ratio of period is greater than where emission problem subcycle
The air-fuel ratio reasonability of idling operation or at the uniform velocity operating condition differentiates range limit threshold value (as shown in table 5 1.02), then with second
The reference voltage value of lambda sensor before voltage step size improves.
Wherein, first voltage step-length, second voltage step-length can be set as fixed value, and first voltage step-length, the second electricity
Pressure step-length can be set as identical value, such as 0.1mv.In order to further increase efficiency, first voltage step-length (second voltage step-length)
Can also according to the air-fuel ratio and idling operation of period where emission problem subcycle or at the uniform velocity under operating condition (on) limit threshold
The deviation range of value determines.
Based on the identical thought of method as described above, Fig. 4 shows the vehicle discharge mark of the vehicle in one embodiment
The structural schematic diagram of system is determined, as shown in figure 4, the system in the embodiment includes:
Data obtaining module 401, for obtaining the examination that cold start final vacuum pollutant emission trial run recycles under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters during testing；
Positioning problems module 402, the gas emissions data for each subcycle to the operation cycle are arranged
Data analysis is put, determines emission problem subcycle；
Air/fuel ratio determination module 403, the air-fuel ratio for the period where obtaining the emission problem subcycle；
Operating condition determination type module 404, for being joined according to the vehicle-state of period where the emission problem subcycle
Number, determines the operating condition type of the emission problem subcycle；
Demarcating module 405, for air-fuel ratio, the operating condition type according to the period where the emission problem subcycle
Air-fuel ratio reasonability differentiate range, to vehicle discharge control parameter demarcate.
Based on the scheme of embodiment as described above, followed based on cold start final vacuum pollutant emission trial run under room temperature
Gas emissions data, air-fuel ratio and vehicle status parameters during the test of ring, to the institute of each subcycle of operation cycle
It states gas emissions data and carries out Emission data analysis, determine emission problem subcycle, and based on where emission problem subcycle
The vehicle status parameters of period determine the operating condition type of emission problem subcycle, then according to where emission problem subcycle
The air-fuel ratio of period, the air-fuel ratio reasonability of the operating condition type differentiate range, demarcate to the control parameter of vehicle discharge,
It improves vehicle discharge by automatically analyzing to emissions data, orienting emission problem subcycle and carrying out automatic Calibration
The calibration efficiency of calibration.
The structural schematic diagram of the problems in specific example locating module is shown in Fig. 5, as shown in figure 5, a tool
The problems in body example locating module 402 includes:
Discharge value obtains module 4021, for obtaining the gas of each subcycle from the gas emissions data during test
Body emissions data, the gas emissions data include each gas type of each subcycle discharge amount and each gas type
Concentration of emission value；
Initial alignment module 4022, the discharge amount for any one gas type in subcycle is beyond the subcycle
When the discharge threshold value of the gas type, which is determined as initial alignment subcycle；
Final locating module 4023, the concentration of emission value for any one gas type in initial alignment subcycle are super
Out when the concentration of emission limit value of the gas type of the initial alignment subcycle, which is determined as described ask
Inscribe subcycle.
Wherein, whether final locating module 4023 exceeds the gas class of the subcycle in the discharge amount for determining gas type
When the discharge threshold value of type, for the discharge gas of gas with various type, corresponding discharge threshold value can difference.In addition,
For the discharge gas of same gas type, the concentration of emission limit value of each subcycle of operation cycle can also not
Together, the concentration of emission limit value of specific each subcycle, can be after being split based on concentration of emission limit value demand, be divided into each
In a subcycle.
Above-mentioned vehicle status parameters can be configured in conjunction with actual needs, in a specific example, vehicle-state ginseng
Number may include: accelerator open degree, accelerator open degree change rate, gear, speed, acceleration.
Accordingly, Fig. 6 shows the structural schematic diagram of the operating condition determination type module in a specific example, as shown in fig. 6,
Operating condition determination type module 404 in one specific example includes；
Idling operation determining module 4041, for be 0 in speed, accelerator open degree 0 and gear are neutral gear when, determine institute
The operating condition type for stating emission problem subcycle is idling operation；
Accelerating mode determining module 4042, for not being neutral gear, accelerator open degree greater than 0, accelerator open degree change rate in gear
Greater than 0 and less than 100% and when acceleration is greater than 0, determine that the operating condition type of the emission problem subcycle is accelerating mode；
Decelerating mode determining module 4043, for gear be not neutral gear, speed be not 0 and accelerator open degree be 0 when, determine
The operating condition type of the emission problem subcycle is decelerating mode；
At the uniform velocity operating condition determining module 4044, for be 0 in acceleration, gear is neutral gear and accelerator open degree is not 0 when, determine
The operating condition type of the emission problem subcycle is at the uniform velocity operating condition.
Accordingly, Fig. 7 shows the structural schematic diagram of the demarcating module in a specific example, the calibration in the specific example
Module 405 includes:
Distributive value demarcating module 4051 is used for when the operating condition type is accelerating mode or decelerating mode, if described
The air-fuel ratio of period where emission problem subcycle is less than accelerating mode or the air-fuel ratio reasonability of decelerating mode differentiates model
Lower threshold is enclosed, the concentration of distributive value when vehicle accelerates or slows down is reduced according to the first concentration step-length, if the discharge is asked
The air-fuel ratio of period where inscribing subcycle is greater than accelerating mode or the air-fuel ratio reasonability of decelerating mode differentiates range limit
Threshold value increases the concentration of distributive value when vehicle accelerates or slows down according to the second concentration step-length；
Preceding lambda sensor demarcating module 4052 is used for when the operating condition type is idling operation or at the uniform velocity operating condition, if
The air-fuel ratio of period where the emission problem subcycle is less than idling operation or the air-fuel ratio reasonability of at the uniform velocity operating condition is sentenced
Other range lower limit threshold value, the reference voltage value of lambda sensor before being reduced with first voltage step-length；If the emission problem subcycle
The air-fuel ratio reasonability that the air-fuel ratio of place period is greater than idling operation or at the uniform velocity operating condition differentiates range limit threshold value, then with
The reference voltage value of lambda sensor before second voltage step-length improves.
Wherein, the first concentration step-length can be set as fixed value, in order to further increase efficiency, can also be asked according to discharge
The air-fuel ratio of period where inscribing subcycle and the air-fuel ratio reasonability of accelerating mode or decelerating mode differentiate range lower limit threshold
The deviation range of value determines.Similarly, the second concentration step-length can be set as fixed value, can also in order to further increase efficiency
To be sentenced according to the air-fuel ratio of period where emission problem subcycle and the air-fuel ratio reasonability of accelerating mode or decelerating mode
The deviation range of other range limit threshold value determines.At this point, distributive value demarcating module 4051, is also used to according to emission problem
The air-fuel ratio of period where circulation and the air-fuel ratio reasonability of the accelerating mode or decelerating mode differentiate range lower limit threshold
The deviation range of value determines the first concentration step-length, according to the air-fuel ratio of period where the emission problem subcycle with
The air-fuel ratio reasonability of the accelerating mode or decelerating mode differentiates the deviation range of range limit threshold value, determines described second
Concentration step-length.
Similarly, first voltage step-length can be set as fixed value, can also be according to discharge in order to further increase efficiency
The air-fuel ratio reasonability of the air-fuel ratio of period and idling operation or at the uniform velocity operating condition where problem subcycle differentiates range lower limit
The deviation range of threshold value determines.Similarly, second voltage step-length can be set as fixed value, in order to further increase efficiency,
It can be closed according to the air-fuel ratio of the air-fuel ratio of period and the idling operation or at the uniform velocity operating condition where emission problem subcycle
Rationality differentiates that the deviation range of range limit threshold value determines.At this point, preceding lambda sensor demarcating module 4052, is also used in the work
Condition type be idling operation or at the uniform velocity operating condition when, according to the air-fuel ratio of period where the emission problem subcycle with it is described
The air-fuel ratio reasonability of idling operation or at the uniform velocity operating condition differentiates the deviation range of range lower limit threshold value, determines the first voltage
Step-length, according to the air-fuel of the air-fuel ratio of period and the idling operation or at the uniform velocity operating condition where the emission problem subcycle
Than the deviation range that reasonability differentiates range limit threshold value, the second voltage step-length is determined.
During actual operation cycle, further includes a special subcycle having in addition to above-mentioned operating condition, that is, operate
One period of the beginning of the test of circulation is referred to as test initial stage subcycle in the present embodiment.The initial rank of the test
Cross-talk circulation is the first time period of above-mentioned test process starting process, which is usually 11 seconds.Certainly, in conjunction with reality
The difference of the type of vehicle of border test, the setting which can also be different.
In the test initial stage subcycle, including there are two types of processes: idling process after starting process and starting.Its
In, starting process is to be more than or equal to default starting from engine speed in the first time period of test process starting process
The first time point of revolving speed, until after first time point, engine speed be less than or equal to the of static object revolving speed for the first time
Test process between two time points, i.e., the process of above-mentioned first time point and the second time point.Idling process is upper after starting
It states in first time period, the test process between third time point from after above-mentioned second time point to speed greater than 0.
Therefore, in a specific example, as shown in fig. 6, the operating condition determination type module 404 in a specific example is also
May include；
State of starting operating process determining module 4045, the emission problem subcycle for determining in positioning problems module 402 are
When testing initial stage subcycle, vehicle status parameters are based on, includes mainly above-mentioned engine speed, speed, determines above-mentioned
First time point, the second time point, third period, and determine therefrom that out and test the starting process in initial stage subcycle
The time range of idling process after time range, starting, and based on the air-fuel ratio data based on acquisition, determine starting process
The air-fuel ratio of the time range of idling process after air-fuel ratio, starting in time range, and will be in the time range of starting process
The air-fuel ratio reasonability of air-fuel ratio and start-up course differentiate that range is compared, by the time range of idling process after starting
Air-fuel ratio differentiates that range is compared with the air-fuel ratio reasonability of idling process after starting, determines the work of emission problem subcycle
Condition type is idling process after starting process still starts.
If it is determined that the operating condition type of emission problem subcycle be to test the starting process of initial stage subcycle, then can be with
The concentration of distributive value is adjusted.For example, distributive value demarcating module 4051 is less than start-up course in the air-fuel ratio of starting process
Air-fuel ratio reasonability differentiate range air-fuel ratio reasonability differentiate range lower limit threshold value when, then according to the first concentration step-length reduce
The concentration of distributive value when vehicle accelerates or slows down is greater than the air-fuel ratio reasonability of start-up course in the air-fuel ratio of starting process
When differentiating that the air-fuel ratio reasonability of range differentiates range limit threshold value, then increases vehicle according to the second concentration step-length and accelerate or subtract
The concentration of distributive value when fast.
If it is determined that emission problem subcycle operating condition type be test initial stage subcycle starting after idling process,
It can also be handled by a similar method.For example, the air-fuel ratio of the idling process after actuation of distributive value demarcating module 4051
When air-fuel ratio reasonability less than idling process after starting differentiates the air-fuel ratio reasonability differentiation range lower limit threshold value of range, then press
The concentration of distributive value when vehicle accelerates or slows down is reduced according to the first concentration step-length, the air-fuel ratio of idling process is big after actuation
After starting idling process air-fuel ratio reasonability differentiate range air-fuel ratio reasonability differentiate range limit threshold value when, then according to
Second concentration step-length increases the concentration of distributive value when vehicle accelerates or slows down.
Wherein, which can be set as fixed value, can also be according to discharge in order to further increase efficiency
After the air-fuel ratio and starting process or starting of period where problem subcycle (idling process after starting process or starting)
The air-fuel ratio reasonability of idling process differentiates that the deviation range of range lower limit threshold value determines.Similarly, the second concentration step-length can be with
Be set as fixed value, in order to further increase efficiency, can also according to the period where emission problem subcycle (starting process or
Person starting after idling process) air-fuel ratio and starting process or starting after idling process air-fuel ratio reasonability differentiate range on
The deviation range for limiting threshold value determines.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of vehicle of vehicle discharges scaling method, which is characterized in that comprising steps of
Obtain gas emissions data, the sky under room temperature during the test of cold start final vacuum pollutant emission trial run circulation
Combustion ratio and vehicle status parameters；
Emission data analysis is carried out to the gas emissions data of each subcycle of the operation cycle, determines emission problem
Circulation；
The air-fuel ratio of period where obtaining the emission problem subcycle；
According to the vehicle status parameters of period where the emission problem subcycle, the work of the emission problem subcycle is determined
Condition type；
Model is differentiated according to the air-fuel ratio, the air-fuel ratio reasonability of the operating condition type of period where the emission problem subcycle
It encloses, the control parameter of vehicle discharge is demarcated.
2. the vehicle of vehicle according to claim 1 discharges scaling method, which is characterized in that each of the operation cycle
The gas emissions data of subcycle carries out Emission data analysis, determines that the mode of emission problem subcycle includes:
From the gas emissions data during test, the gas emissions data of each subcycle, the gas emissions data are obtained
The discharge amount of each gas type including each subcycle and the concentration of emission value of each gas type；
In the discharge threshold value for the gas type that the discharge amount of any one gas type of subcycle exceeds the subcycle,
The subcycle is determined as initial alignment subcycle；
Exceed the gas of the initial alignment subcycle in the concentration of emission value of any one gas type of initial alignment subcycle
When the concentration of emission limit value of body type, which is determined as described problem subcycle.
3. the vehicle of vehicle according to claim 1 discharges scaling method, which is characterized in that the vehicle status parameters packet
It includes: accelerator open degree, accelerator open degree change rate, gear, speed, acceleration；
According to the vehicle status parameters of period where the emission problem subcycle, the work of the emission problem subcycle is determined
The mode of condition type includes:
When speed is 0, accelerator open degree 0 and gear are neutral gear, determine that the operating condition type of the emission problem subcycle is idle
Fast operating condition；
Gear be not neutral gear, accelerator open degree be greater than 0, accelerator open degree change rate be greater than 0 and less than 100% and acceleration be greater than 0
When, determine that the operating condition type of the emission problem subcycle is accelerating mode；
Gear be not neutral gear, speed be not 0 and accelerator open degree be 0 when, determine the operating condition type of the emission problem subcycle
For decelerating mode；
When acceleration is 0, gear is neutral gear and accelerator open degree is not 0, the operating condition type of the emission problem subcycle is determined
For at the uniform velocity operating condition.
4. the vehicle of vehicle according to claim 3 discharges scaling method, which is characterized in that according to emission problem
The air-fuel ratio, the air-fuel ratio reasonability of the operating condition type of period where circulation differentiates range, joins to the control of vehicle discharge
Counting the mode demarcated includes:
When the operating condition type is accelerating mode or decelerating mode, if the sky of period where the emission problem subcycle
Combustion differentiates range lower limit threshold value than being less than the air-fuel ratio reasonability of accelerating mode or decelerating mode, subtracts according to the first concentration step-length
The concentration of distributive value when few vehicle accelerates or slows down, if the air-fuel ratio of period is greater than where the emission problem subcycle
The air-fuel ratio reasonability of accelerating mode or decelerating mode differentiates range limit threshold value, increases vehicle according to the second concentration step-length and adds
The concentration of distributive value when speed or deceleration；
When the operating condition type is idling operation or at the uniform velocity operating condition, if the sky of period where the emission problem subcycle
Combustion differentiates range lower limit threshold value than being less than the air-fuel ratio reasonability of idling operation or at the uniform velocity operating condition, with the reduction of first voltage step-length
The reference voltage value of preceding lambda sensor；If the air-fuel ratio of period where the emission problem subcycle be greater than idling operation or
At the uniform velocity the air-fuel ratio reasonability of operating condition differentiates range limit threshold value, then the reference electricity of lambda sensor before being improved with second voltage step-length
Pressure value.
5. the vehicle of vehicle according to claim 4 discharges scaling method, it is characterised in that:
When the operating condition type is accelerating mode or decelerating mode, according to the period where the emission problem subcycle
Air-fuel ratio and the air-fuel ratio reasonability of the accelerating mode or decelerating mode differentiate the deviation range of range lower limit threshold value, determine
The first concentration step-length according to the air-fuel ratio of period where the emission problem subcycle and the accelerating mode or subtracts
The air-fuel ratio reasonability of fast operating condition differentiates the deviation range of range limit threshold value, determines the second concentration step-length；
When the operating condition type is idling operation or at the uniform velocity operating condition, according to the period where the emission problem subcycle
The air-fuel ratio reasonability of air-fuel ratio and the idling operation or at the uniform velocity operating condition differentiates the deviation range of range lower limit threshold value, determines
The first voltage step-length, according to the air-fuel ratio of period where the emission problem subcycle and the idling operation or even
The air-fuel ratio reasonability of fast operating condition differentiates the deviation range of range limit threshold value, determines the second voltage step-length.
6. a kind of vehicle of vehicle discharges calibration system characterized by comprising
Data obtaining module, for obtaining under room temperature during the test of cold start final vacuum pollutant emission trial run circulation
Gas emissions data, air-fuel ratio and vehicle status parameters；
Positioning problems module, the gas emissions data for each subcycle to the operation cycle carry out emissions data point
Analysis, determines emission problem subcycle；
Air/fuel ratio determination module, the air-fuel ratio for the period where obtaining the emission problem subcycle；
Operating condition determination type module is determined for the vehicle status parameters according to the period where the emission problem subcycle
The operating condition type of the emission problem subcycle；
Demarcating module, for air-fuel ratio, the air-fuel of the operating condition type according to the period where the emission problem subcycle
Range is differentiated than reasonability, and the control parameter of vehicle discharge is demarcated.
7. the vehicle of vehicle according to claim 6 discharges calibration system, which is characterized in that described problem locating module packet
It includes:
Discharge value obtains module, and the gas for from the gas emissions data during test, obtaining each subcycle discharges number
According to the gas emissions data includes the discharge amount of each gas type of each subcycle and the concentration of emission of each gas type
Value；
Initial alignment module exceeds the gas class of the subcycle for the discharge amount of any one gas type in subcycle
When the discharge threshold value of type, which is determined as initial alignment subcycle；
Final locating module, the concentration of emission value for any one gas type in initial alignment subcycle are initial beyond this
When positioning the concentration of emission limit value of the gas type of subcycle, which is determined as described problem and is followed
Ring.
8. the vehicle of vehicle according to claim 6 discharges calibration system, which is characterized in that the vehicle status parameters packet
It includes: accelerator open degree, accelerator open degree change rate, gear, speed, acceleration；
The operating condition determination type module includes:
Idling operation determining module, for be 0 in speed, accelerator open degree 0 and gear are neutral gear when, determine that the discharge is asked
The operating condition type for inscribing subcycle is idling operation；
Accelerating mode determining module, for not being that neutral gear, accelerator open degree are greater than 0 and small greater than 0, accelerator open degree change rate in gear
In 100% and acceleration be greater than 0 when, determine that the operating condition type of the emission problem subcycle is accelerating mode；
Decelerating mode determining module, for gear be not neutral gear, speed be not 0 and accelerator open degree be 0 when, determine the discharge
The operating condition type of problem subcycle is decelerating mode；
At the uniform velocity operating condition determining module, for be 0 in acceleration, gear is neutral gear and accelerator open degree is not 0 when, determine the discharge
The operating condition type of problem subcycle is at the uniform velocity operating condition.
9. the vehicle of vehicle according to claim 8 discharges calibration system, which is characterized in that the demarcating module includes:
Distributive value demarcating module is used for when the operating condition type is accelerating mode or decelerating mode, if the emission problem
The air-fuel ratio of period where subcycle is less than accelerating mode or the air-fuel ratio reasonability of decelerating mode differentiates range lower limit threshold
Value reduces the concentration of distributive value when vehicle accelerates or slows down according to the first concentration step-length, if the emission problem subcycle
The air-fuel ratio of place period is greater than accelerating mode or the air-fuel ratio reasonability of decelerating mode differentiates range limit threshold value, according to
Second concentration step-length increases the concentration of distributive value when vehicle accelerates or slows down；
Preceding lambda sensor demarcating module is used for when the operating condition type is idling operation or at the uniform velocity operating condition, if the discharge
The air-fuel ratio of period where problem subcycle is less than idling operation or the air-fuel ratio reasonability of at the uniform velocity operating condition differentiates under range
Threshold value is limited, the reference voltage value of lambda sensor before reducing with first voltage step-length；If the time where the emission problem subcycle
The air-fuel ratio of section is greater than idling operation or the air-fuel ratio reasonability of at the uniform velocity operating condition differentiates range limit threshold value, then with second voltage
The reference voltage value of lambda sensor before step-length improves.
10. the vehicle of vehicle according to claim 9 discharges calibration system, it is characterised in that:
The distributive value demarcating module is also used to be added according to the air-fuel ratio of period where the emission problem subcycle with described
Fast operating condition or the air-fuel ratio reasonability of decelerating mode differentiate the deviation range of range lower limit threshold value, determine the first concentration step
It is long, according to the air-fuel ratio of the air-fuel ratio of period and the accelerating mode or decelerating mode where the emission problem subcycle
Reasonability differentiates the deviation range of range limit threshold value, determines the second concentration step-length；
The preceding lambda sensor demarcating module is used for when the operating condition type is idling operation or at the uniform velocity operating condition, according to institute
The air-fuel ratio reasonability of the air-fuel ratio and the idling operation or at the uniform velocity operating condition of period is sentenced where stating emission problem subcycle
The deviation range of other range lower limit threshold value determines the first voltage step-length, according to the time where the emission problem subcycle
The air-fuel ratio reasonability of the air-fuel ratio of section and the idling operation or at the uniform velocity operating condition differentiates the deviation range of range limit threshold value,
Determine the second voltage step-length.
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| CN109944706B (en) * | 2019-03-29 | 2022-06-24 | 潍柴动力股份有限公司 | Method and device for regulating and controlling nitrogen oxide emission |
| CN113530651B (en) * | 2020-04-17 | 2022-10-04 | 联合汽车电子有限公司 | Gasoline engine catalyst converter window testing method, electronic equipment and readable storage medium |
| CN113092122A (en) * | 2021-04-13 | 2021-07-09 | 哈尔滨东安汽车发动机制造有限公司 | Test method for simulating real vehicle cold start emission by using engine pedestal |
| CN113324760B (en) * | 2021-06-17 | 2022-12-23 | 哈尔滨东安汽车动力股份有限公司 | Emission optimization calibration method for automobile acceleration and deceleration working condition |
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