CN107917003A - A kind of control method of engine smoothness of operation - Google Patents
A kind of control method of engine smoothness of operation Download PDFInfo
- Publication number
- CN107917003A CN107917003A CN201610889176.6A CN201610889176A CN107917003A CN 107917003 A CN107917003 A CN 107917003A CN 201610889176 A CN201610889176 A CN 201610889176A CN 107917003 A CN107917003 A CN 107917003A
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- China
- Prior art keywords
- cylinder
- engine
- advance angle
- control method
- work capacity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
Abstract
The present invention provides a kind of control method of engine smoothness of operation, comprise the following steps：The work capacity of each cylinder is monitored, judges to need the cylinder of energy correction；Judge the energy correction direction of the cylinder for needing energy correction, and determine therefrom that the amendment direction of the cylinder spark advance angle；The ignition advance angle of the cylinder is corrected until the work capacity of the cylinder is normal or ignition advance angle has reached the modified limiting value of institute's energy.This method, solves the jitter problem in engine operation process to a certain extent, improves the driving and comfort property of automobile.Further, since engine operates steadily, so also adding the service life of engine to a certain extent.
Description
Technical field
The present invention relates to engine art, more particularly to a kind of control method of engine smoothness of operation.
Background technology
In order to reduce motor vehicle exhaust emission, meet that Abgasgesetz constantly plus sternly requires, in control, to being assembled with spark ignition type
The automobile of internal combustion engine proposes the technical requirements of higher.Divide cylinder control technology as one of reduction motor vehicle emission technology, it is numerous
Auto vendor is applied.
Cylinder control technology is divided to correct the distributive value of each cylinder respectively according to the difference of each cylinder intake air quantity of engine so that
The air-fuel ratio of all cylinders is all close to 1, it is ensured that mixer fully burns, and reduces discharge.But the control technology is in application process
It inevitably result in another problem：Since the air inflow of each cylinder is unequal, in air-fuel ratio close in the case of 1, respectively
The energy that cylinder acting produces can be unequal.When the level of difference of each cylinder acting energy reaches a certain level, can make to start
Machine produces jitter phenomenon during the work time, so that the comfort for reducing the driving of automobile and taking.
The content of the invention
It is an object of the invention to provide a kind of control method of engine smoothness of operation, to solve existing engine
Cylinder energy inequality causes the phenomenon that engine is shaken.
In order to solve the above technical problems, the present invention provides a kind of control method of engine smoothness of operation, including with
Lower step：
The work capacity of each cylinder of engine is monitored, judges to need the cylinder of energy correction；
Judge the energy correction direction of each cylinder for needing energy correction, and according to each cylinder for needing energy correction
Energy correction direction determine each cylinder for needing energy correction ignition advance angle amendment direction；
The igniting of each cylinder of amendment adjustment in direction of ignition advance angle based on each cylinder for needing energy correction carries
Anterior angle, to correct the work capacity of each cylinder for needing energy correction.
Optionally, the work capacity of each cylinder of engine, the segmentation are monitored using the split time of each cylinder
Time by engine management system according to each cylinder effectively do work experience time calculate obtain.
Optionally, whether judge cylinder needs the modified method to be：It is adjacent that any two acting is calculated as follows first
The absolute value of the split time difference of cylinder,
Δ t=| tiM-ti(M-1)|
Wherein, Δ t represents the absolute value of the split time difference of the adjacent cylinder of any two acting, tiMRepresent any gas
The split time of cylinder, ti(M-1)Represent the split time of the cylinder adjacent with any cylinder acting；
When the absolute value of the split time difference of the adjacent cylinder of any two acting is more than pre-set threshold value, and institute's duration
More than preset time, then judge that the cylinder needs energy correction.
Optionally, the cylinder of required energy correction includes the relatively low gas of the higher cylinder of work capacity and work capacity
Cylinder；
The method in the energy correction direction for judging each cylinder for needing energy correction includes：
If the split time of any cylinder is more than the split time for the adjacent cylinder that does work with any cylinder,
Any cylinder is the relatively low cylinder of work capacity；
If the split time of any cylinder is less than the split time for the adjacent cylinder that does work with any cylinder,
Any cylinder is the higher cylinder of work capacity.
Optionally, the amendment direction of the ignition advance angle includes reducing ignition advance angle and increase ignition advance angle；
The cylinder relatively low to the work capacity, increases ignition advance angle；The cylinder higher to the work capacity, reduces
Ignition advance angle.
Optionally, the times of revision of the cylinder spark advance angle is at least once, each correction amount is increase or subtracts
One fixed value of small ignition advance angle, and continue to monitor the work capacity of each cylinder after each correct, judgement is
No needs continue to correct.
Optionally, further included before the work capacity of each cylinder of monitoring engine：The operating mode of engine is carried out
Monitoring.
Optionally, when the operating mode of engine changes violent for engine there are misfire fault or engine operating condition, temporarily
Stop to each cylinder operation energy monitoring.
Optionally, the operating mode of engine is monitored using engine management system.
Optionally, it is larger if there is two or more cylinder operation energy huntings, then without energy correction.
, can be according to each cylinder of engine in a kind of control method of engine smoothness of operation provided by the invention
Split time monitors the work capacity of each cylinder, and judges energy correction direction accordingly, by adjusting ignition advance angle to starting
Machine work capacity is modified, and is solved the jitter problem in engine operation process to a certain extent, is improved automobile
Cornering ability, and this method is simple and easy to control；On the other hand, since the energy hunting of each cylinder of engine reduces, so
Also the service life of engine is added to a certain extent.
Brief description of the drawings
Fig. 1 is the flow chart of the control method of the engine smoothness of operation of one embodiment of the application.
Embodiment
The present invention core concept be to provide a kind of control method of engine smoothness of operation, especially work as engine
The energy for producing each cylinder acting because each cylinder intake air quantity is different is unequal, so as to cause engine to produce during the work time
Jitter phenomenon, the comfort to automobile exert a certain influence.By the monitoring to each cylinder energy of engine, energy is judged
Larger cylinder is fluctuated, and under the premise of caused by judging that the energy hunting is not special operation condition, it is larger to the energy hunting
The ignition advance angle of cylinder is adjusted, and untill the capacity volume variance of each cylinder is less than a certain range, is started so as to reach raising
The purpose of machine smoothness of operation.
Below in conjunction with the drawings and specific embodiments to a kind of control method of engine smoothness of operation proposed by the present invention
It is described in further detail.According to following explanation and claims, advantages and features of the invention will become apparent from.It should be noted
It is that attached drawing uses using very simplified form and non-accurate ratio, only to convenience, lucidly aids in illustrating this hair
The purpose of bright embodiment.
Embodiment one
Refering to Fig. 1, it is illustrated that the flow chart of the control method of the present embodiment engine smoothness of operation.
S1：Judge the larger cylinder of energy hunting and determine that the energy hunting is not that special operation condition causes.Specifically, judge
The larger cylinder of energy hunting, inventor, which studies, finds that it is each can to obtain engine for engine management system when engine operates
The split time of a cylinder, and the work energy for mirroring the cylinder can be sent out by the split time contrast with the adjacent cylinder of doing work
Amount situation.Split time refers to effective working application time of each cylinder started, i.e., can be by sending out in the time used in expansion stroke
Motivation management system obtains, if some cylinder work capacity greatly if its speed for being operated during expansion stroke with regard to fast, phase
The split time answered is also just small.If the difference of the split time of the value of a certain cylinder split time and its adjacent cylinder that does work
Absolute value is bigger, then the work capacity of a certain cylinder is more unstable.Ideally, in the engine operating condition of stable state
Under, the split time value approximately equal of each cylinder.So the engine that can be provided according to engine management system is each
The split time value of a cylinder, monitors the work capacity situation of each cylinder.The split time of cylinder is represented with ti, works as engine
M cylinders split time tiMWith the split time ti of the cylinder of ignition-powering before the cylinder(M-1)Difference absolute value
More than ti1When, then need to be modified the energy of M cylinders.tiMIt is the split time value of any one cylinder of engine,
ti1It is the threshold values being set in advance in engine management system, those skilled in the art can be according to requiring engine performance
The appropriate adjustment ti of height1Scope.For convenience of explanation, illustrated here with the form of formula.It is on adjacent acting below
The calculation formula of cylinder split time,
Δ t=| tiM-ti(M-1)|
Wherein, Δ t represents the absolute value of the split time difference of the adjacent cylinder of any two acting, tiMRepresent any gas
The split time of cylinder, ti(M-1)Represent the split time of the cylinder adjacent with any cylinder acting.
Engine operating after the smaller then adjustment of value of Δ t is more steady.If Δ t values are less than or equal to ti1Value, then illustrate
The energy of M cylinders need not be corrected, and engine management system continues to be monitored the split time of other cylinders.
Meanwhile erroneous judgement in order to prevent, when engine is in special operation condition, (there is misfire fault or engine work in engine
Condition acute variation, for example, the fluctuation of speed or torque ripple it is larger when) when, then stop energy monitoring calculate, to avoid cylinder energy
Amount is corrected by mistake.On the other hand, corrected by mistake to further reduce, it is also necessary to which delay judges, when the Δ t values of the M cylinders of engine
More than ti1When, its duration is also calculated, if its duration TMMore than the preset value being stored in engine management system
T1, then judge to need to carry out energy correction to M cylinders.Same TMValue can suitably be adjusted at that time according to the situations of different engines
Between length, TMValue it is bigger, then occur it is by mistake modified may smaller, TMValue it is smaller, then occur by mistake it is modified may be bigger.
S2：Judge cylinder energy correction direction, further judge the amendment direction of ignition advance angle.
After the situation for excluding special operation condition, the cylinder for needing energy correction is corrected.The gas of required energy correction
Cylinder includes the relatively low cylinder of the higher cylinder of work capacity and work capacity.The energy correction of cylinder is by adjusting corresponding cylinder
Ignition advance angle is realized.
Ignition advance angle refers to that gasoline engine crank plays piston from time of ignition and reaches institute in compression top center this period
The angle turned over.If igniting is too early, combustion knock can be caused, piston stroking upward is obstructed, and efficiency reduces, abrasion aggravation；If igniting
Too late, air work efficiency is low, and exhaust sound is big.Appropriate increase ignition advance angle, can improve mechanical efficiency, and function is done in lifting
Amount.
The method of energy correction includes reducing ignition advance angle and increase ignition advance angle.When cylinder operation energy is excessive,
Then reduce ignition advance angle；Energy is too low, then increases ignition advance angle.
The judgement for correcting direction judges according to the size of two cylinder split times of adjacent acting.If tiM-ti(M-1)
Difference for just, then illustrate that the energy of M cylinders is too low, ignition advance angle increases at this time；If tiM-ti(M-1)Difference be it is negative,
Then illustrate that the energy of M cylinders is excessive, ignition advance angle reduces at this time.
S3：Correct ignition advance angle.
Reduction ignition advance angle and the method for increase ignition advance angle are：Each ignition advance angle is in upper once electronic spark advance
A fixed value is increased or decreased on the basis of angle, and continues to monitor be corrected cylinder and eve igniting cylinder split time
Difference.If the difference for being corrected the split time of cylinder and eve igniting cylinder is less than the threshold values set in advance, should
The energy correction process of cylinder terminates.If ignition advance angle is adapted to the attainable limiting value (maximum or minimum value) of institute,
And the difference for being corrected the split time of cylinder and eve igniting cylinder at this time is still more than default threshold values, then igniting is exited
Advance angle correction mechanism, switches to the normal control program of engine management system.
In addition, engine management system monitors the work capacity situation of all cylinders at the same time, if there is two or two
Cylinder operation energy hunting above is larger, then without energy correction, i.e., is corrected at the same time without multi cylinder energy.So do
Purpose be in order to avoid caused energy monitoring erroneous judgement during multi cylinder energy hunting at the same time and correct by mistake.
To sum up embodiment, has the advantages that：On the spark ignition type electric-control motor for applying point cylinder control technology,
Each cylinder operation energy hunting is monitored according to engine split time value, and judges energy correction direction, is carried by adjusting igniting
Anterior angle is modified engine work capacity, solves the jitter problem in engine operation process to a certain extent, changes
The cornering ability of automobile has been apt to it, and this method is simple and easy to control；On the other hand, the method for the split time for monitoring cylinder is utilized
To judge that the work capacity of cylinder simplifies control process；On the other hand, since the energy hunting of each cylinder of engine reduces,
The abrasion of cylinder also accordingly reduces, so also adding the service life of engine to a certain extent.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Scope.
Claims (10)
1. a kind of control method of engine smoothness of operation, it is characterised in that comprise the following steps：
The work capacity of each cylinder of engine is monitored, judges to need the cylinder of energy correction；
Judge the energy correction direction of each cylinder for needing energy correction, and according to the energy of each cylinder for needing energy correction
Amount corrects the amendment direction that direction determines the ignition advance angle of each cylinder for needing energy correction；
The ignition advance angle of the amendment each cylinder of adjustment in direction of ignition advance angle based on each cylinder for needing energy correction,
To correct the work capacity of each cylinder for needing energy correction.
2. the control method of engine smoothness of operation as claimed in claim 1, it is characterised in that utilize point of each cylinder
The work capacity of each cylinder of section time supervision engine；The split time is by engine management system according to each cylinder
The time of effectively acting experience, which calculates, to be obtained.
3. the control method of engine smoothness of operation as claimed in claim 2, it is characterised in that judge whether cylinder needs
Modified method is：The absolute value of the split time difference of the adjacent cylinder of any two acting is calculated as follows first,
Δ t=| tiM-ti(M-1)|
Wherein, Δ t represents the absolute value of the split time difference of the adjacent cylinder of any two acting, tiMRepresent point of any cylinder
Section time, ti(M-1)Represent the split time of the cylinder adjacent with any cylinder acting；
When the do work absolute value of the split time difference of adjacent cylinder of any two is more than pre-set threshold value, and institute's duration exceedes
Preset time, then judge that the cylinder needs energy correction.
4. the control method of engine smoothness of operation as claimed in claim 3, it is characterised in that required energy correction
Cylinder includes the relatively low cylinder of the higher cylinder of work capacity and work capacity；
The method in the energy correction direction for judging each cylinder for needing energy correction includes：
If the split time of any cylinder is more than the split time for the adjacent cylinder that does work with any cylinder, described
Any cylinder is the relatively low cylinder of work capacity；
If the split time of any cylinder is less than the split time for the adjacent cylinder that does work with any cylinder, described
Any cylinder is the higher cylinder of work capacity.
5. the control method of engine smoothness of operation as claimed in claim 4, it is characterised in that the ignition advance angle
Correcting direction includes reducing ignition advance angle and increase ignition advance angle；
The cylinder relatively low to the work capacity, increases ignition advance angle；The cylinder higher to the work capacity, reduces igniting
Advance angle.
6. the control method of engine smoothness of operation as claimed in claim 1, it is characterised in that the cylinder spark shifts to an earlier date
The times of revision at angle is that at least once, each correction amount is increase or a fixed value of reduction ignition advance angle, and every
Continue to monitor the work capacity of each cylinder after secondary amendment, judge whether that needs continue to correct.
7. the control method of engine smoothness of operation as claimed in claim 1, it is characterised in that in each of monitoring engine
Further included before the work capacity of a cylinder：The operating mode of engine is monitored.
8. the control method of engine smoothness of operation as claimed in claim 7, it is characterised in that when the operating mode of engine is
Engine suspends to each cylinder operation energy monitoring there are when misfire fault or violent engine operating condition change.
9. the control method of engine smoothness of operation as claimed in claim 8, it is characterised in that utilize engine management system
Unite and the operating mode of engine is monitored.
10. the control method of engine smoothness of operation as claimed in claim 1, it is characterised in that if there is two or
More than two cylinder operation energy huntings are larger, then without energy correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889176.6A CN107917003B (en) | 2016-10-11 | 2016-10-11 | Control method for engine running stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889176.6A CN107917003B (en) | 2016-10-11 | 2016-10-11 | Control method for engine running stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107917003A true CN107917003A (en) | 2018-04-17 |
| CN107917003B CN107917003B (en) | 2020-04-07 |
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ID=61892623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610889176.6A Active CN107917003B (en) | 2016-10-11 | 2016-10-11 | Control method for engine running stability |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108730095A (en) * | 2018-06-05 | 2018-11-02 | 星科动力有限公司 | A kind of ignition control method and system of bi-block engine |
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| CN107917003B (en) | 2020-04-07 |
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