CN109781415A - A kind of calculating of air input of engine by air and Bench calibration method - Google Patents
A kind of calculating of air input of engine by air and Bench calibration method Download PDFInfo
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- CN109781415A CN109781415A CN201910122354.6A CN201910122354A CN109781415A CN 109781415 A CN109781415 A CN 109781415A CN 201910122354 A CN201910122354 A CN 201910122354A CN 109781415 A CN109781415 A CN 109781415A
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Abstract
The invention discloses a kind of calculating of air input of engine by air and Bench calibration method, and the admission pressure of engine is measured by air inlet pressure sensor；The air inflow of engine is measured by air mass flow instrument；The air inflow and admission pressure of engine are linear function relationship, i.e. a=bx-y；It is maintained under a specific revolving speed in engine, the air inflow of engine under some accelerator open degree is measured by the air mass flow, admission pressure at this time is measured again, in this way in the case where guaranteeing that revolving speed is constant, by adjusting throttle opening, the data of corresponding several groups air input of engine by air and admission pressure are measured；Data fitting is carried out by MATLAB again, calculates air inlet slope x and air inlet intercept y under this engine speed.This method is simpler, more accurate than traditional oil consumption method, more efficient, to improve the efficiency and accuracy of engine charge model calibration.
Description
Technical field
The invention belongs to the technical fields of engine control.More particularly it relates to a kind of air input of engine by air
It calculates and Bench calibration method.
Background technique
In face of increasingly strict engine national emission standard, engine pedestal demarcates the ever more important that seems.Engine into
Air volume calculation it is accurate whether, be related to whether engine passes through national emission standard.
Traditional technology is all the air inflow that engine is measured using oil consumption method, method complexity, low efficiency, and acquisition
Data error is big.
Summary of the invention
The present invention provides the calculating and Bench calibration method of a kind of air input of engine by air, and the purpose is to make air input of engine by air
What is calculated is more accurate, while improving the working efficiency of engine charge model calibration.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
The calculating and Bench calibration method of air input of engine by air of the invention, the air inflow applied to engine are tested,
Be characterized in that: the experimental provision that the method uses include engine pedestal and air mass flow instrument, air inlet pressure sensor,；
Engine is mounted on engine pedestal；
The process of this method is:
1) admission pressure of engine, is measured by air inlet pressure sensor；Engine is measured by air mass flow instrument
Air inflow；
2), the air inflow of engine and admission pressure are linear function relationship, i.e. a=bx-y；
Wherein:
The air inflow of a --- engine；
B --- admission pressure；
X --- air inlet slope；
Y --- air inlet intercept；
3), in the case where engine maintains a specific revolving speed, some oil is measured by the fine air flowmeter
The air inflow of engine under door aperture, then admission pressure at this time is measured, in this way in the case where guaranteeing that revolving speed is constant, lead to
Adjustment throttle opening is crossed, the data of corresponding several groups air input of engine by air and admission pressure are measured；
4) data fitting, is carried out by MATLAB again, calculates air inlet slope x and air inlet intercept y under this engine speed.
The present invention by adopting the above technical scheme, by utilizing air flow meter and air inlet pressure sensor, finds out some spy
Determine the air inlet slope and air inlet intercept under engine speed, and then utilizes this unitary linear function, it is only necessary to know that admission pressure,
The air inflow of different solar terms aperture under this revolving speed can be sought；This method is simpler, more accurate than traditional oil consumption method, and efficiency is more
Height, to improve the efficiency and accuracy of engine charge model calibration.
Detailed description of the invention
Fig. 1 is proposed by the present invention when engine speed is 1000 turns, the calculating of air input of engine by air and Bench calibration
The flow chart of method.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Illustrate, to help those skilled in the art to have more complete, accurate and deep reason to inventive concept of the invention, technical solution
Solution.
As shown in Figure 1, for the calculating of air input of engine by air of the invention and the process of Bench calibration method, applied to starting
The air inflow of machine is tested.It is more accurate the purpose is to calculate air input of engine by air, while improving engine charge model mark
Fixed efficiency.
In order to overcome prior art defect, above-mentioned purpose of the invention is realized, the technical scheme adopted by the invention is as follows:
As shown in Figure 1, the calculating of the air input of engine by air and Bench calibration method, the experimental provision that the method uses
Including engine, engine pedestal, dynamometer machine, air mass flow instrument, Air/Fuel ratio analysis instrument；Wherein engine is mounted on engine bed
On frame；Dynamometer machine is connected with engine by hinged disk；
The process of this method is:
1) admission pressure of engine, is measured by air inlet pressure sensor；Engine is measured by air mass flow instrument
Air inflow；
2), the air inflow of engine and admission pressure are linear function relationship, i.e. a=bx-y；
Wherein:
The air inflow of a --- engine；
B --- admission pressure；
X --- air inlet slope；
Y --- air inlet intercept；
3), in the case where engine maintains a specific revolving speed, some is measured by the fine air flowmeter on rack
The air inflow of engine under accelerator open degree, then admission pressure at this time is measured, in this way in the case where guaranteeing that revolving speed is constant,
By adjusting throttle opening, the data of corresponding several groups air input of engine by air and admission pressure are measured；
4) data fitting, is carried out by MATLAB again, calculates air inlet slope x and air inlet intercept y under this engine speed.
The calculating and Bench calibration method, measurement and arrangement including data finally fit a linear function.It is this
Method can accurately calculate the air inflow of engine, can also improve the working efficiency of engine pedestal calibration simultaneously.This hair
It is bright by adopting the above technical scheme, it is simple, quickly, effectively, to improve the efficiency and accuracy of engine charge model calibration.
Specific method is analyzed as follows:
As shown in Figure 1, when engine speed is 1000 revs/min, measure throttle opening be respectively 10%, 20%,
30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% when air input of engine by air, the air inflow of the engine
Respectively a1, a2, a3, a4, a5, a6, a7, a8, a9, a10；The admission pressure of engine when correspondingly measuring corresponding respectively
B1, b2, b3, b4, b5, b6, b7, b8, b9, b10, using the relationship a=bx-y of air inflow and admission pressure, using MATLAB
Value x1000, y1000 of x and y at this time can be fitted, if by pressure sensor measure engine speed be 1000 when
Admission pressure, so that it may calculate air inflow at this time.
And so on, according to mode identical when being 1000 revs/min with engine speed, engine speed can be calculated
Respectively 600,800,1200,1600,2000,2400,2800,3200,3600,4000,4400,4800,5200,5600 turns/
Minute when x value be x600, x800, x1200, x1600, x2000, x2400, x2800, x3200, x3600, x4000, x4400,
X4800, x5200, x5600, y value be y600, y800, y1200, y1600, y2000, y2400, y2800, y3200, y3600,
y4000,y4400,y4800,y5200,y5600；By x, y, b, it is depicted as a three-dimensional table, as long as measuring the air inlet at corresponding moment
Pressure, it can calculate air inflow at this time.
The air inflow of engine can indirectly be calculated by measuring admission pressure by air inlet pressure sensor.Engine into
Tolerance and admission pressure are linear function relationships, i.e. air inflow=admission pressure of engine × air inlet slope-air inlet intercept.
In the case where engine maintains a specific revolving speed, some accelerator open degree is measured by the fine air flowmeter on rack and is issued
The air inlet amount of motivation, then measure admission pressure at this time, by adjusting throttle opening, measure corresponding several groups of engines into
The data of tolerance and admission pressure are carrying out data fitting by MATLAB, calculate air inlet slope under this engine speed with
Air inlet intercept.The present invention is compared with existing method, more accurately, efficiently.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (3)
1. a kind of calculating of air input of engine by air and Bench calibration method, the air inflow applied to engine is tested, and feature exists
In: the experimental provision that the method uses include engine pedestal and air mass flow instrument, air inlet pressure sensor,；Engine
It is mounted on engine pedestal；
The process of this method is:
1) admission pressure of engine, is measured by air inlet pressure sensor；The air inlet of engine is measured by air mass flow instrument
Amount；
2), the air inflow of engine and admission pressure are linear function relationship, i.e. a=bx-y；
Wherein:
The air inflow of a --- engine；
B --- admission pressure；
X --- air inlet slope；
Y --- air inlet intercept；
3) it, in the case where engine maintains a specific revolving speed, is measured under some accelerator open degree by the air mass flow
The air inflow of engine, then admission pressure at this time is measured, in this way in the case where guaranteeing that revolving speed is constant, by adjusting section
Valve opening measures the data of corresponding several groups air input of engine by air and admission pressure；
4) data fitting, is carried out by MATLAB again, calculates air inlet slope x and air inlet intercept y under this engine speed.
2. the calculating of air input of engine by air described in accordance with the claim 1 and Bench calibration method, it is characterised in that: work as engine
When revolving speed is 1000 revs/min, measure throttle opening be respectively 10%, 20%, 30%, 40%, 50%, 60%, 70%,
80%, 90%, 100% when air input of engine by air, the air inflow of the engine be respectively a1, a2, a3, a4, a5, a6,
a7,a8,a9,a10；Admission pressure b1, b2 of engine when correspondingly measuring corresponding respectively, b3, b4, b5, b6, b7, b8,
B9, b10 can fit the value of x and y at this time using MATLAB using the relationship a=bx-y of air inflow and admission pressure
X1000, y1000, as long as measuring admission pressure when engine speed is 1000 by pressure sensor, so that it may calculate at this time
Air inflow.
3. the calculating of air input of engine by air and Bench calibration method according to claim 2, it is characterised in that: according to hair
Identical mode when motivation revolving speed is 1000 revs/min, can calculate engine speed be respectively 600,800,1200,1600,
2000,2400,2800,3200,3600,4000,4400,4800,5200,5600 revs/min when x value be x600, x800,
X1200, x1600, x2000, x2400, x2800, x3200, x3600, x4000, x4400, x4800, x5200, x5600, y value are
y600、y800、y1200、y1600、y2000、y2400、y2800、y3200、y3600、y4000、y4400、y4800、y5200、
y5600；The parameter of x, y, b are depicted as a three-dimensional table, as long as measuring the admission pressure at corresponding moment, it can calculate at this time
Air inflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910122354.6A CN109781415A (en) | 2019-02-19 | 2019-02-19 | A kind of calculating of air input of engine by air and Bench calibration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910122354.6A CN109781415A (en) | 2019-02-19 | 2019-02-19 | A kind of calculating of air input of engine by air and Bench calibration method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646212A (en) * | 2019-10-23 | 2020-01-03 | 成都飞机工业（集团）有限责任公司 | Novel method for calibrating aircraft engine |
| CN110987442A (en) * | 2019-12-30 | 2020-04-10 | 宁波洁程汽车科技有限公司 | Calibration method for performance of engine pedestal of extended range electric automobile |
| CN114235099A (en) * | 2021-12-16 | 2022-03-25 | 潍柴动力股份有限公司 | Engine air intake system and calibration value verification method and device of MAF sensor of engine air intake system |
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| JP2005090437A (en) * | 2003-09-19 | 2005-04-07 | Toyota Motor Corp | Control device for internal combustion engine |
| JP2007211747A (en) * | 2006-02-13 | 2007-08-23 | Toyota Motor Corp | Intake air amount estimating device of internal combustion engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646212A (en) * | 2019-10-23 | 2020-01-03 | 成都飞机工业（集团）有限责任公司 | Novel method for calibrating aircraft engine |
| CN110987442A (en) * | 2019-12-30 | 2020-04-10 | 宁波洁程汽车科技有限公司 | Calibration method for performance of engine pedestal of extended range electric automobile |
| CN114235099A (en) * | 2021-12-16 | 2022-03-25 | 潍柴动力股份有限公司 | Engine air intake system and calibration value verification method and device of MAF sensor of engine air intake system |
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