CN109882300A - A kind of method and apparatus for correcting volumetric efficiency - Google Patents
A kind of method and apparatus for correcting volumetric efficiency Download PDFInfo
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- CN109882300A CN109882300A CN201711275927.6A CN201711275927A CN109882300A CN 109882300 A CN109882300 A CN 109882300A CN 201711275927 A CN201711275927 A CN 201711275927A CN 109882300 A CN109882300 A CN 109882300A
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Abstract
The invention discloses a kind of method and apparatus for correcting volumetric efficiency, this method comprises: obtaining the suction press of the suction press of engine and calibration machine under identical operating condition parameter, calibration machine is the engine for carrying out calibration calibration to engine；According to the suction press of the suction press of engine and calibration machine, it is poor to obtain the first suction press；It is poor according to the first suction press, determine target correction term；According to target correction term and preset volumetric efficiency calculation formula, the revised volumetric efficiency of engine is obtained.It can be seen that, a correction term is obtained according to the difference between engine and the suction press of calibration machine, by the way that this correction term is integrated into former volumetric efficiency calculation formula, it can correct between engine due to practical volumetric efficiency deviations of brings such as manufacture, processing, installation scattered errors, solve the problems, such as that the volumetric efficiency calculated with calibration machine there are the practical volumetric efficiency and calibration machine of the same model of scattered error or close type engine is inconsistent.
Description
Technical field
The present invention relates to data analytical calculation technical field more particularly to a kind of method and apparatus for correcting volumetric efficiency.
Background technique
In practical application, the control of automobile engine is based on volumetric efficiency, and volumetric efficiency, which is called, does inflation coefficient of charge, is
Refer in each working cycles of internal combustion engine, is actually sucked in cylinder under fresh air quantity and air intake duct state full of cylinder
The theoretical air mass values of swept volume.It will lead to the related oil spout of control, igniting and can since volumetric efficiency calculates deviation
The parameters such as air valve variation timing (English: Variable Valve Timing, abbreviation: VVT) deviate, that is, the parameter after control
It is not the parameter of preset optimization, and then the oil consumption, discharge, power performance that can not achieve engine optimize, therefore,
The accurate volumetric efficiency that calculates is the basic premise for controlling engine.
In the prior art, volumetric efficiency calculation method is repaired mainly based on hydromechanical empirical equation with arteries and veins spectrogram
It is just auxiliary.For other engines of same type, the calculating of volumetric efficiency will directly be filled with what the calibration of calibration machine was completed
The calculating of gas efficiency.As long as that is, with calibration machine control parameter as, volumetric efficiency calculated also with calibration machine one
Sample.Since volumetric efficiency is that the fresh air quantity that the every circulation of single cylinder flows into cylinder is filled with the theory being calculated by air-suction state
The ratio of makings amount so the factor for influencing engine gas flowing all will affect practical air inflow, and then influences volumetric efficiency
Calculating.
Inventor has found that air inlet flow resistance, air inlet temperature rise, intake and exhaust phase angle, discharge flow resistance (shadow
Rehearse with musical accompaniment valve-closing when temperature and in-cylinder pressure) etc. all will affect practical air inflow so that practical volumetric efficiency and
There is deviation using the volumetric efficiency that calibration machine is calculated.The existing mode for calculating volumetric efficiency assumes that all same types
Engine corresponds to the same calibration machine, and the factor for influencing engine gas flowing is all consistent or deviation very little can be with
It ignores, so that the volumetric efficiency for all same type engines being calculated is the same under same service condition.But
In fact, since engine is extremely complex equipment, when installation of the processing technology of each components and each components, can not
It is completely accurate, inevitably there is deviation between the different engines of same type, this will lead to the different engines of same type
Between practical air inflow it is different, the practical volumetric efficiency of the different engines of same type is different.Therefore, existing skill is utilized
The volumetric efficiency that the mode of art is calculated for same type exist processing and installation deviation different engines for not
Accurately.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of method and apparatus for correcting volumetric efficiency, to same machine
It is modified between type difference engine due to processing and installing bring deviation, it is corresponding to obtain same type difference engine
More accurate volumetric efficiency.
In a first aspect, the embodiment of the invention provides a kind of methods for correcting volumetric efficiency, this method comprises:
Obtain the suction press of the suction press of engine and calibration machine under identical operating condition parameter, the calibration
Machine is the engine for carrying out calibration calibration to the engine；
According to the suction press of the suction press of the engine and the calibration machine, the first suction press is obtained
Difference；
It is poor according to first suction press, determine target correction term；
According to the target correction term and preset volumetric efficiency calculation formula, the revised inflation of the engine is obtained
Efficiency, the preset volumetric efficiency calculation formula are derived by according to multiple complicated empirical equations.
Preferably, the operating condition is specifically characterized operating condition, and the feature operating condition is in the engine operation process
The high operating condition of the frequency of occurrences；The operating condition parameter include under the operating condition revolving speed of engine, air throttle open
Degree, inlet valve timing and exhaust valve timing.
Preferably, described poor according to first suction press, it determines target correction term, specifically includes:
According to the correction chart of the first suction press difference and the corresponding first suction press difference, acquisition second into
Tracheal pressure is poor, and the measurement data when correction chart is according to two engine actual motions devious is pre-set
's；
The second suction press difference is determined as the target correction term.
Preferably, described poor according to first suction press, it determines target correction term, specifically includes:
According to the correction chart of the first suction press difference and the corresponding first suction press difference, acquisition second into
Tracheal pressure is poor, and the measurement data when correction chart is according to two engine actual motions devious is pre-set
's；
According to the correction chart in the correction chart set of the operating condition parameter and the corresponding operating condition parameter, obtain
Correction factor, the measurement data when correction chart in the correction chart set is according to two engine actual motions devious
It pre-sets；
According to the second suction press difference and the correction factor, it is poor to obtain third suction press；
The third suction press difference is determined as the target correction term.
Preferably, the correction chart set includes corresponding revolving speed and the correction chart of load, corresponding revolving speed and inlet valve timing
Correction chart and corresponding revolving speed and the correction chart of exhaust valve timing it is one or more.
Second aspect, the embodiment of the invention provides a kind of devices for correcting volumetric efficiency characterized by comprising
Suction press acquiring unit, for obtaining the suction press of engine and calibration under identical operating condition parameter
The suction press of machine, the calibration machine are the engines for carrying out calibration calibration to the engine；
First suction press difference obtaining unit, for according to the suction press of the engine and the calibration machine
It is poor to obtain the first suction press for suction press；
Target correction term determination unit, it is poor according to first suction press to be used for, and determines target correction term；
Volumetric efficiency obtaining unit, for obtaining according to the target correction term and preset volumetric efficiency calculation formula
The revised volumetric efficiency of engine, the preset volumetric efficiency calculation formula are pushed away according to multiple complicated empirical equations
It leads.
Preferably, the operating condition is specifically characterized operating condition, and the feature operating condition is in the engine operation process
The high operating condition of the frequency of occurrences；The operating condition parameter include under the operating condition revolving speed of engine, air throttle open
Degree, inlet valve timing and exhaust valve timing.
Preferably, the target correction term determination unit specifically includes the second suction press difference and obtains subelement and target
Correction term determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and correspondence
The correction chart of first suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two hairs devious
What measurement data when motivation actual motion was pre-set；
The target correction term determines subelement, corrects for the second suction press difference to be determined as the target
?.
Preferably, the target correction term determination unit specifically includes the second suction press difference and obtains subelement, amendment
Coefficient obtains subelement, third suction press difference obtains subelement and target correction term determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and correspondence
The correction chart of first suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two hairs devious
What measurement data when motivation actual motion was pre-set；
The correction factor obtains subelement, for according to the operating condition parameter and the corresponding operating condition parameter
Correction chart set in correction chart, obtain correction factor, the correction chart in the correction chart set is that have deviation according to two
Engine actual motion when measurement data pre-set；
The third suction press difference obtains subelement, for according to the second suction press difference and the amendment
It is poor to obtain third suction press for coefficient；
The target correction term determines subelement, corrects for the third suction press difference to be determined as the target
?.
Preferably, the correction chart set includes corresponding revolving speed and the correction chart of load, corresponding revolving speed and inlet valve timing
Correction chart and corresponding revolving speed and the correction chart of exhaust valve timing it is one or more.
Compared with prior art, the present invention has at least the following advantages:
Using the technical solution of the embodiment of the present invention, obtain under identical operating condition parameter the suction press of engine and
The suction press of calibration machine, the calibration machine are the engines for carrying out calibration calibration to the engine；According to described
It is poor to obtain the first suction press for the suction press of the suction press of engine and the calibration machine；According to described first
Suction press is poor, determines target correction term；According to the target correction term and preset volumetric efficiency calculation formula, institute is obtained
The revised volumetric efficiency of engine is stated, the preset volumetric efficiency calculation formula is derived according to multiple complicated empirical equations
It obtains.It can be seen that according to the difference between engine and the suction press of calibration machine, an available correction term,
By the way that this correction term is integrated into original volumetric efficiency calculation formula, can correct between engine since manufacture, processing, installation dissipate
The practical volumetric efficiency deviation of the brings such as difference, solves that there are the same model of scattered error or close type engines with calibration machine
The inconsistent problem of the volumetric efficiency that practical volumetric efficiency and calibration machine calculate.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is system framework schematic diagram involved in application scenarios a kind of in the embodiment of the present invention；
Fig. 2 is a kind of flow diagram of method for correcting volumetric efficiency provided in an embodiment of the present invention；
Gas flow schematic diagram when Fig. 3 is cylinder working cycles air-breathing provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of device for correcting volumetric efficiency provided in an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Inventor has found that it is existing calculate volumetric efficiency mode assume that all same type engines with it is right
The same calibration machine is answered, the factor for influencing engine gas flowing is all consistent or deviation very little can be ignored,
To based on hydromechanical empirical equation, supplemented by arteries and veins spectrogram, calculate the inflation effect of calibration machine under same service condition
Volumetric efficiency will be calculated as the volumetric efficiency of all engines of same type in rate.But in fact, since engine is
Extremely complex equipment, can not be completely accurate when the installation of the processing technology of each components and each components, same type
Inevitably there is deviation between different engines, cause to influence engine gas flowing because being known as deviation, for example, same type
The differences such as the air inlet flow resistances of different engines, air inlet temperature rise, intake and exhaust phase angle, discharge flow resistance, and then same machine
Practical air inflow between the different engines of type is different, that is, the practical volumetric efficiency of the different engines of same type is
Different.Therefore, the volumetric efficiency being calculated in the way of the prior art is for the different engines of same type
It is inaccurate.
That is, the volumetric efficiency that the prior art is calculated is there are deviation, which will lead to related oil spout, igniting
And the control of the parameters such as variable valve timing (English: Variable Valve Timing, abbreviation: VVT) deviates, into
And the oil consumption, discharge, power performance that can not achieve engine optimize.For example, starting under some operating condition of engine
5 degree igniting before the original top dead centre of machine, at this moment power, oil consumption, combustion stability etc. is best, but due to volumetric efficiency deviation,
Engine igniting time becomes 0 degree, and at this moment various performances are all bad.
In order to solve this problem, in embodiments of the present invention, the air inlet of engine under identical operating condition parameter is obtained
The suction press of pipe pressure and calibration machine, the calibration machine are the engines for carrying out calibration calibration to the engine；
According to the suction press of the suction press of the engine and the calibration machine, it is poor to obtain the first suction press；According to
First suction press is poor, determines target correction term；It is calculated according to the target correction term and preset volumetric efficiency public
Formula, obtains the revised volumetric efficiency of the engine, and the preset volumetric efficiency calculation formula is according to multiple complicated warps
Test what the derivation of equation obtained.It can be seen that according to the difference between engine and the suction press of calibration machine, available one
A correction term, this correction term have modified the original volumetric efficiency calculation formula of calibration machine, obtain belonging to the more accurate of engine
Volumetric efficiency, solve under identical operating condition between the different engines of same type with the calculated volumetric efficiency phase of calibration machine
Same but practical different problems.
For example, one of the scene of the embodiment of the present invention, can be applied in scene as shown in Figure 1.The scene
In include sensor 101, processor 102, controller 103.Processor 102, which has been got, passes through biography under identical operating condition parameter
The suction press for the engine that sensor 101 obtains and the suction press of pre-stored calibration machine, the calibration machine are to use
In the engine for carrying out calibration calibration to the engine；Processor 102 is according to the suction press of the engine and described
It is poor to obtain the first suction press for the suction press of calibration machine；Processor 102 is poor according to first suction press, really
Set the goal correction term；Processor 102 starts described in acquisition according to the target correction term and preset volumetric efficiency calculation formula
The revised volumetric efficiency of machine；The volumetric efficiency is passed to controller 103 by processor 102, so that controller 103 is according to institute
It states the parameters such as the related oil spout of volumetric efficiency control engine, igniting and variable valve timing and is in optimization, to realize hair
The oil consumption of motivation, discharge, power performance optimize.
It is understood that in above-mentioned application scenarios, although by the action description of embodiment of the present invention by processor
102 execute.But the present invention is unrestricted in terms of executing subject, moves disclosed in embodiment of the present invention as long as performing
Work.
It is understood that above-mentioned scene is only a Sample Scenario provided in an embodiment of the present invention, the embodiment of the present invention
It is not limited to this scene.
With reference to the accompanying drawing, the method and dress of volumetric efficiency are calculated in the present invention will be described in detail embodiment by embodiment
The specific implementation set.
Illustrative methods
Referring to fig. 2, a kind of flow diagram for the method for correcting volumetric efficiency in the embodiment of the present invention is shown.In this reality
It applies in example, the method for example may comprise steps of:
Step 201: the suction press of the suction press of engine and calibration machine under identical operating condition parameter is obtained,
The calibration machine is the engine for carrying out calibration calibration to the engine.
It should be noted that under identical service condition, all same type engines for being calculated based on calibration machine
Volumetric efficiency is the same, however engine is extremely complex equipment, the peace of the processing technology of each components and each components
Can not be completely accurate when dress, inevitably there is deviation between the different engines of same type, causes to influence engine gas stream
It is dynamic because being known as deviation, the practical volumetric efficiency of the different engines of same type is different.Therefore, in order to obtain together
The one actual volumetric efficiency of type difference engine needs to know that there are the flowings of related gas between engine and calibration machine
Deviation, and then correct and volumetric efficiency is calculated based on calibration machine.
It is possible, firstly, to learn gas flow through throttle valve body the differential equation it is as follows:
Wherein, μ and A respectively indicates discharge coefficient and circulation area at valve；pI, pⅡIt respectively indicates before throttle valve body and saves
Pressure after flowing valve body；ρ1For atmospheric density before air throttle, k is isentropic index (usually taking k=1.4 for engine), and n is hair
Motivation revolving speed.
Gas flow schematic diagram when cylinder working cycles air-breathing as shown in Figure 3, wherein 1 is air throttle, 2 for into
Valve, 3 be exhaust valve, and 4 be piston, and 5 be cylinder, and 6 be air inlet pipe, and 7 be exhaust pipe.As shown from the above formula, as long as air inlet pipe
Pressure pⅡ<pI* 0.528 circulation area (throttle opening) fixed for some, regardless of pⅡHow to change, is flowed into from air throttle
The gas flow m of inlet manifoldinIt is constant, under some specific engine speed, in suction, that is, cylinder that piston downlink generates
Pressure pcylIt is constant.For example, pressure p before air throttleI=1013kPa, suction press pⅡ<pI* 0.528=535kPa, fixed
M under circulation areainIt is constant, p under specific engine speedcylIt is constant.In suction press pⅡWith inner pressure of air cylinder pcylPressure
Under the action of power difference, gas flows out air inlet pipe and flows into cylinder, and flow is denoted as mout.Work as minWith moutWhen reaching dynamic equilibrium, hair
Motivation stable operation, at this point, the suction press p between different enginesⅡDifference to represent intake resistance between different engines poor.
According to above-mentioned analysis, obtained conclusion are as follows: engine air inlet tube pressure pⅡHigher expression engine needs higher
Suction press pⅡWith inner pressure of air cylinder pcylPressure difference could be identical with other engines, that is to say, that engine charge
Pipe pressure pⅡHigher, gas is higher by the resistance in air inlet pipe inflow cylinder.Based on the conclusion, can be started by obtaining difference
Suction press between machine and calibration machine is poor, the case where to determine intake resistance difference between engine and calibration machine.
It should be noted that the operating condition of engine has very much, can with important to note that when usually driving it is commonly used
Operating condition, that is, the setting of these operating conditions is characterized operating condition, will demarcate machine by the operating condition that engine is often run to
This feature duty parameter be stored in advance, in order to when engine runs to this feature operating condition, that is to say, that when starting
When the feature duty parameter of machine is identical as the feature duty parameter of pre-stored calibration machine, the embodiment of the present invention can be carried out
Scheme.Therefore, in the present embodiment, the operating condition is specifically characterized operating condition, and the feature operating condition is engine fortune
The high operating condition of the frequency of occurrences during row；The operating condition parameter include the revolving speed of engine under the operating condition,
Throttle opening, inlet valve timing and exhaust valve timing.For example, it is 2000rpm, air throttle that the feature operating condition, which can be revolving speed,
Aperture is 10, inlet and exhaust valve timing be 0 Smaller load urban conditions or revolving speed be 750rpm, throttle opening 10, into
Valve timing is 20, the idling operation etc. that exhaust valve timing is -15.
Step 202: according to the suction press of the suction press of the engine and the calibration machine, obtain first into
Tracheal pressure is poor.
It should be noted that step 202 is the difference for the suction press being calculated between engine and calibration machine, it should
Pressure difference can directly correct the inflation being calculated based on calibration machine directly as the target correction term in below step 203
Efficiency.
Step 203: it is poor according to first suction press, determine target correction term.
It should be noted that duty parameter can also generate certain influence to above-mentioned first suction press difference, therefore, also
It is poor that the first suction press can be corrected based on duty parameter, obtain more accurate target correction term in easier method,
And then the volumetric efficiency obtained based on target correction term is closer to the practical volumetric efficiency of engine.Duty parameter is generally basede on to repair
Positive first suction press is poor, determines that target correction term can have following two implementation:
Measurement data discovery when the first is according to engine actual motion, for same engine, different solar terms
Door aperture, the first suction press obtained according to the suction press of the suction press of the engine and the calibration machine
Difference is also different, and to make subsequent volumetric efficiency convenience of calculation, the first suction press difference of acquisition is mapped to a certain specific by we
This particular value is substituted into volumetric efficiency calculation formula by value.Specifically, step 201 for example may include: root
According to the correction chart of the first suction press difference and the corresponding first suction press difference, the second suction press is obtained
Difference, the measurement data when correction chart is according to two engine actual motions devious are pre-set；It will be described
Second suction press difference is determined as the target correction term.
For example, throttle opening is in the case where revolving speed is 2000rpm, inlet and exhaust valve timing is equal to 10 identical operating conditions
When 10, the first suction press difference of acquisition is 50hPa；Throttle opening is that the first suction press difference of 20 acquisitions is
30hPa checks the correction chart for answering the first suction press difference to guarantee global precision, obtains corresponding first air inlet pipe pressure
Second suction press difference 35hPa of power difference, is determined as the target correction term for the second suction press difference 35hPa,
Volumetric efficiency calculation formula is substituted into, volumetric efficiency is calculated.
Second is that for engine in different rotating speeds load, different inlet and exhaust valves are just at present, poor to suction press, i.e., into
The sensibility of atmidometer difference is different, and hence it is also possible to according to the corresponding revolving speed of operating condition, load, inlet and exhaust valve timing etc.
It is poor that parameter continues the second suction press of amendment, wherein load can be the parameters such as accelerator open degree.Specifically, step 201 is for example
It may include: to obtain second according to the correction chart of the first suction press difference and the corresponding first suction press difference
Suction press is poor, and the measurement data when correction chart is according to two engine actual motions devious is pre-set
's；According to the correction chart in the correction chart set of the operating condition parameter and the corresponding operating condition parameter, corrected
Coefficient, the measurement data when correction chart in the correction chart set is according to two engine actual motions devious are preparatory
It sets；According to the second suction press difference and the correction factor, it is poor to obtain third suction press；By described
Three suction press differences are determined as the target correction term.
It should be noted that in practical applications, both can choose according to revolving speed and load and corresponding revolving speed and load
The mode of correction chart, it is poor to correct the second suction press to obtain correction factor, also can choose according to revolving speed and inlet valve just
When and corresponding revolving speed and the correction chart of inlet valve timing mode, it is poor to correct the second suction press to obtain correction factor；Also
It can choose the mode according to revolving speed and exhaust valve timing and corresponding revolving speed and the correction chart of exhaust valve timing, obtain correction factor
It is poor to correct the second suction press；Certainly it can also be obtained according to any two kinds in above-mentioned three kinds of modes or three kinds of modes
Correction factor is poor to correct the second suction press.Therefore, in the present embodiment, the correction chart set include corresponding revolving speed with
The correction chart of load, corresponding revolving speed and the correction chart of inlet valve timing and corresponding revolving speed and the correction chart of exhaust valve timing one kind or
It is a variety of.
For example, obtaining coefficient a according to the correction chart of revolving speed and load and corresponding revolving speed and load；According to revolving speed and air inlet
The correction chart of door timing and corresponding revolving speed and inlet valve timing, obtains coefficient b；According to revolving speed and exhaust valve timing and corresponding revolving speed
With the correction chart of exhaust valve timing, coefficient c is obtained；Correction factor=a*b*c is calculated according to a, b, c.
Step 204: according to the target correction term and preset volumetric efficiency calculation formula, obtaining the engine amendment
Volumetric efficiency afterwards, the preset volumetric efficiency calculation formula are derived by according to multiple complicated empirical equations.
It should be noted that the preset volumetric efficiency calculation formula being derived by according to multiple complicated empirical equations can be with
It is:
φc=k × (pⅡ-pegr+m)；
Wherein, Ф c is volumetric efficiency；pⅡIt is calibration machine intake manifold pressure；M is target correction term；K and pegrBe by
What a series of complex empirical equation calculated.Specifically, preset inflation is derived by according to multiple complicated empirical equations to imitate
The process of rate calculation formula is as follows:
By the definition of volumetric efficiency:
Wherein m1For the fresh air quantity actually sucked in each working cycles intrinsic motivation cylinder of internal combustion engine；mshIt is interior
The theoretical air quality of displacement is full of in each working cycles of combustion engine under air intake duct state；
When IC Intake Valve Closes, gas in the jar gross mass is ma, by the fresh charge m of every circulation sucking cylinder1With a upper circulation
Residual gas quality m in cylinderegr’Two parts composition, pressure are as follows: PaEqual to pⅡ.So:
ms=m1+megr’
From the state equation of perfect gas:
Therefore:
Due to Pa=pⅡ, institute's above formula can between turn to following form.
φc=k × (pⅡ-pegr+m)
The various embodiments provided through this embodiment obtain the air inlet pipe pressure of engine under identical operating condition parameter
The suction press of power and calibration machine, the calibration machine are the engines for carrying out calibration calibration to the engine；According to
It is poor to obtain the first suction press for the suction press of the suction press of the engine and the calibration machine；According to described
First suction press is poor, determines target correction term；According to the target correction term and preset volumetric efficiency calculation formula, obtain
The revised volumetric efficiency of engine is obtained, the preset volumetric efficiency calculation formula is according to multiple complicated empirical equations
It is derived by.It can be seen that according to the difference between engine and the suction press of calibration machine, an available amendment
, this correction term has modified the original volumetric efficiency calculation formula of calibration machine, obtains the more accurate inflation for belonging to engine
Efficiency solves identical but real with the calculated volumetric efficiency of calibration machine between the different engines of same type under identical operating condition
Border different problems.
Example devices
Referring to fig. 4, a kind of structural schematic diagram for the device for correcting volumetric efficiency in the embodiment of the present invention is shown.In this reality
It applies in example, described device for example can specifically include:
Suction press acquiring unit 401, for obtain under identical operating condition parameter the suction press of engine and
The suction press of calibration machine, the calibration machine are the engines for carrying out calibration calibration to the engine；
First suction press difference obtaining unit 402, for according to the engine suction press and the calibration
It is poor to obtain the first suction press for the suction press of machine；
Target correction term determination unit 403, it is poor according to first suction press to be used for, and determines target correction term；
Volumetric efficiency obtaining unit 404, for obtaining according to the target correction term and preset volumetric efficiency calculation formula
Obtain the revised volumetric efficiency of engine.
Optionally, the operating condition is specifically characterized operating condition, and the feature operating condition is in the engine operation process
The high operating condition of the frequency of occurrences；The operating condition parameter include under the operating condition revolving speed of engine, air throttle open
Degree, inlet valve timing and exhaust valve timing.
Optionally, the target correction term determination unit 403 specifically include the second suction press difference obtain subelement and
Target correction term determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and correspondence
The correction chart of first suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two hairs devious
What measurement data when motivation actual motion was pre-set；
The target correction term determines subelement, corrects for the second suction press difference to be determined as the target
?.
Optionally, the target correction term determination unit 403 specifically includes the second suction press difference and obtains subelement, repairs
Positive coefficient obtains subelement, third suction press difference obtains subelement and target correction term determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and correspondence
The correction chart of first suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two hairs devious
What measurement data when motivation actual motion was pre-set；
The correction factor obtains subelement, for according to the operating condition parameter and the corresponding operating condition parameter
Correction chart set in correction chart, obtain correction factor, the correction chart in the correction chart set is that have deviation according to two
Engine actual motion when measurement data pre-set；
The third suction press difference obtains subelement, for according to the second suction press difference and the amendment
It is poor to obtain third suction press for coefficient；
The target correction term determines subelement, corrects for the third suction press difference to be determined as the target
?.
Optionally, the correction chart set includes corresponding revolving speed and the correction chart of load, corresponding revolving speed and inlet valve timing
Correction chart and corresponding revolving speed and the correction chart of exhaust valve timing it is one or more.
The various embodiments provided through this embodiment obtain the air inlet pipe pressure of engine under identical operating condition parameter
The suction press of power and calibration machine, the calibration machine are the engines for carrying out calibration calibration to the engine；According to
It is poor to obtain the first suction press for the suction press of the suction press of the engine and the calibration machine；According to described
First suction press is poor, determines target correction term；According to the target correction term and preset volumetric efficiency calculation formula, obtain
The revised volumetric efficiency of engine is obtained, the preset volumetric efficiency calculation formula is according to multiple complicated empirical equations
It is derived by.It can be seen that according to the difference between engine and the suction press of calibration machine, an available amendment
, this correction term has modified the original volumetric efficiency calculation formula of calibration machine, obtains the more accurate inflation for belonging to engine
Efficiency solves identical but real with the calculated volumetric efficiency of calibration machine between the different engines of same type under identical operating condition
Border different problems.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.The terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other same elements.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (10)
1. a kind of method for correcting volumetric efficiency characterized by comprising
The suction press of the suction press of engine and calibration machine under identical operating condition parameter is obtained, the calibration machine is
For carrying out the engine of calibration calibration to the engine；
According to the suction press of the suction press of the engine and the calibration machine, it is poor to obtain the first suction press；
It is poor according to first suction press, determine target correction term；
According to the target correction term and preset volumetric efficiency calculation formula, the revised inflation effect of the engine is obtained
Rate, the preset volumetric efficiency calculation formula are derived by according to multiple complicated empirical equations.
2. the method according to claim 1, wherein the operating condition is specifically characterized operating condition, the feature
Operating condition is the operating condition that the frequency of occurrences is high in the engine operation process；The operating condition parameter includes the operation work
The revolving speed of engine, throttle opening, inlet valve timing and exhaust valve timing under condition.
3. determining mesh the method according to claim 1, wherein described poor according to first suction press
Correction term is marked, is specifically included:
According to the correction chart of the first suction press difference and the corresponding first suction press difference, the second air inlet pipe is obtained
Pressure difference, the measurement data when correction chart is according to two engine actual motions devious are pre-set；
The second suction press difference is determined as the target correction term.
4. determining mesh the method according to claim 1, wherein described poor according to first suction press
Correction term is marked, is specifically included:
According to the correction chart of the first suction press difference and the corresponding first suction press difference, the second air inlet pipe is obtained
Pressure difference, the measurement data when correction chart is according to two engine actual motions devious are pre-set；
According to the correction chart in the correction chart set of the operating condition parameter and the corresponding operating condition parameter, corrected
Coefficient, the measurement data when correction chart in the correction chart set is according to two engine actual motions devious are preparatory
It sets；
According to the second suction press difference and the correction factor, it is poor to obtain third suction press；
The third suction press difference is determined as the target correction term.
5. according to the method described in claim 4, it is characterized in that, the correction chart set includes repairing for corresponding revolving speed and load
Positive table, corresponding revolving speed and the correction chart of inlet valve timing and corresponding revolving speed and the correction chart of exhaust valve timing are one or more.
6. a kind of device for correcting volumetric efficiency characterized by comprising
Suction press acquiring unit, for obtaining the suction press of engine under identical operating condition parameter and demarcating machine
Suction press, the calibration machine are the engines for carrying out calibration calibration to the engine；
First suction press difference obtaining unit, for the air inlet according to the suction press and the calibration machine of the engine
It is poor to obtain the first suction press for pipe pressure；
Target correction term determination unit, it is poor according to first suction press to be used for, and determines target correction term；
Volumetric efficiency obtaining unit, for according to the target correction term and preset volumetric efficiency calculation formula, described in acquisition
The revised volumetric efficiency of engine, the preset volumetric efficiency calculation formula are derived according to multiple complicated empirical equations
It arrives.
7. device according to claim 6, which is characterized in that the operating condition is specifically characterized operating condition, the feature
Operating condition is the operating condition that the frequency of occurrences is high in the engine operation process；The operating condition parameter includes the operation work
The revolving speed of engine, throttle opening, inlet valve timing and exhaust valve timing under condition.
8. device according to claim 6, which is characterized in that the target correction term determination unit specifically include second into
Tracheal pressure difference obtains subelement and target correction term determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and corresponding described first
The correction chart of suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two engines devious
What measurement data when actual motion was pre-set；
The target correction term determines subelement, for the second suction press difference to be determined as the target correction term.
9. device according to claim 6, which is characterized in that the target correction term determination unit specifically include second into
Tracheal pressure difference obtains subelement, correction factor obtains subelement, third suction press difference obtains subelement and target amendment
Item determines subelement；
The second suction press difference obtains subelement, for according to the first suction press difference and corresponding described first
The correction chart of suction press difference, the second suction press of acquisition is poor, and the correction chart is according to two engines devious
What measurement data when actual motion was pre-set；
The correction factor obtains subelement, for repairing according to the operating condition parameter and the corresponding operating condition parameter
Correction chart in positive table set obtains correction factor, and the correction chart in the correction chart set is according to two hairs devious
What measurement data when motivation actual motion was pre-set；
The third suction press difference obtains subelement, for being according to the second suction press difference and the amendment
It is poor to obtain third suction press for number；
The target correction term determines subelement, for the third suction press difference to be determined as the target correction term.
10. device according to claim 9, which is characterized in that the correction chart set includes corresponding revolving speed and load
Correction chart, corresponding revolving speed and the correction chart of inlet valve timing and corresponding revolving speed and the correction chart of exhaust valve timing are one or more.
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