CN107664082A - A kind of multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling - Google Patents
A kind of multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling Download PDFInfo
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- CN107664082A CN107664082A CN201710911315.5A CN201710911315A CN107664082A CN 107664082 A CN107664082 A CN 107664082A CN 201710911315 A CN201710911315 A CN 201710911315A CN 107664082 A CN107664082 A CN 107664082A
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- 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
- F02P5/15—Digital data processing
- F02P5/152—Digital data processing dependent on pinking
- F02P5/1522—Digital data processing dependent on pinking with particular means concerning an individual cylinder
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
The present invention proposes a kind of multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling, and whether the conditioned area that judgement engine is run first is in pinking conditioned area：If engine operates in non-pinking conditioned area, each cylinder Actual combustion center of gravity AI50 and optimal burning center of gravity AI50 difference are then contrasted one by one, according to the angle of ignition of the separately adjustable each cylinder of each cylinder AI50 difference, the burning center of gravity AI50 of each cylinder is set all to control in optimum position, so as to eliminate uncontrollable phenomenon of the single angle of ignition to gaseous mixture difference；If engine is transported in knocking zone, if detecting that pinking occurs for certain cylinder, carried out by existing knock control.If pinking does not occur for cylinder, the angle of ignition gradually increases the angle of ignition with certain step-length, until the angle of ignition is increased to pinking border（KBL）, so as to improve the fuel economy of engine.
Description
Technical field
The invention belongs to petrol engine combustion, control field, and in particular to a kind of based on multi-cylinder gasoline engine burning center of gravity and quick-fried
Shake feedback, the control method of each cylinder angle of ignition of independent control.
Background technology
The extensive use of internal combustion engine product and the sustainable development of manufacturing industry, to safeguard national security and national economy health
Run most important.Although the world in recent years, is obtained for the new type power technology of representative with electric automobile, fuel cell car etc.
National governments and the great attention of motor corporation, but still unanimously think in the industry, traditional combustion engine powered and vapour before the year two thousand fifty
Car will occupy an leading position.Wherein, gasoline engine is due to power per liter is big, in light weight, work is soft, Particulate Emission compares diesel engine
The multiple advantage such as good, have been widely used for the major impetus of car and passenger car.
It is well known that gasoline engine is done work by spark ignition mixture combustion, the control of ignition system and the angle of ignition
System is the basis of whole combustion process, and it is directly connected to the quality of mixture combustion quality, and then influences the fuel oil of engine
Economy, discharge and NVH performances.For current multi-cylinder gasoline engine, when the certain situation of the rotating speed and load of engine
Under, it is then consistent that ECU, which is exported to the angle of ignition of each cylinder,.
But because engine manufacture and the data assembled are dodged, there is principal fault in poor, certain cylinder, air inlet system and exhaust system design
Defect etc. cause each cylinder air inlet uneven or cylinder in residual waste gas quantity difference the problems such as presence, cause in each cylinder of time of ignition
Mixing gaseity or the amount of gaseous mixture have differences, therefore, now each cylinder should be not to the demand of optimal ignition angle size
The same, and in order to avoid phenomenon of detonation, each cylinder minimum ignition angle is typically chosen as the unified angle of ignition.
It is certain four cylinder 1.5TGDI engine as shown in Figure 1 under 2400rpm＆IMEP=1300KPa operating modes, the identical angle of ignition
Each cylinder shows obvious combustion wave rate., it is apparent that under the identical angle of ignition, the burning weight of the first cylinder and the 4th cylinder
The heart seriously lags, cyclical variations（COV）It is obvious to deteriorate, most vat pressure（Pmax）It is smaller, wherein the deterioration degree of the first cylinder is higher.
From the example it can be confirmed that because the sudden strain of a muscle difference of engine design, manufacture, assembling easily causes the gaseous mixture state difference of each cylinder
Different, situation about causing in the identical angle of ignition reflects obvious combustion wave rate.In other words, each cylinder demand is most in this case
The good angle of ignition is different.
Therefore, in the case where each cylinder gaseous mixture state difference can not eliminate, it is necessary to actual shape according to each cylinder gaseous mixture
State, the angle of ignition of each cylinder is adjusted, to improve the burning quality of engine, improve power, economy and the discharge performance of engine.
The content of the invention
It is an object of the invention to solve the deficiency of existing multi-cylinder gasoline engine igniting integrally and unitarily output control technology, carry
Go out a kind of based on burning center of gravity and pinking feedback information, the control method of each cylinder angle of ignition of single cylinder independent control.
The basic control thought of the present invention is, on multi-cylinder gasoline engine using multiple cylinder pressure sensors feed back each cylinder pinking and
Combustion phase information, the angle of ignition of each cylinder of independent control, makes each cylinder to be operated in optimal igniting in the range of full working scope
Whether whether angle and combustion phase position, ECU check the burning center of gravity AI50 of each operating mode in optimum position or on pinking side
Boundary, the angle of ignition is adjusted in real time if not, each cylinder angle of ignition is carried out self study in the range of full working scope, with
Reach the purpose for improving burning quality, improving fuel economy.In addition, ECU draws engine by the processing to cylinder pressure signal
The pinking information of each cylinder.
Based on above-mentioned thought, a kind of multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling of the invention of proposition, first
Whether the conditioned area that judgement engine is run is in pinking conditioned area：If engine operates in non-pinking conditioned area,
Each cylinder Actual combustion center of gravity AI50 and optimal burning center of gravity AI50 difference are contrasted one by one, it is independent according to each cylinder AI50 difference
The angle of ignition of each cylinder is adjusted, the burning center of gravity AI50 of each cylinder is all controlled in optimum position, so as to eliminate the single angle of ignition to mixed
Close the uncontrollable phenomenon of gas difference；If engine is transported in knocking zone, if detecting that pinking occurs for certain cylinder, by existing quick-fried
Shake control is carried out.If pinking does not occur for cylinder, the angle of ignition gradually increases the angle of ignition with certain step-length, until igniting
Angle increases to pinking border（KBL）, so as to improve the fuel economy of engine.
The method of the invention is realized especially by the following steps：
1st, demarcated firstly the need of to multi-cylinder gasoline engine, obtain following message：
（1）In the range of full working scope, the knocking zone of Multi-Cylinder Diesel Engine and non-knocking zone are calibrated；
（2）The optimal AI50 positions of each operating point of non-knocking zone are calibrated,（AI50:Burn position of centre of gravity）；
（3）Complete the knock control demarcation of engine；
（4）The angle of ignition MAP of Multi-Cylinder Diesel Engine is calibrated according to existing scaling method（The consistent angle of ignition of each cylinder output valve）；
（5）The curve between angle of ignition difference and AI50 differences is fitted, obtains corresponding mathematical relationship.
2nd, according to the rotating speed and load of multi-cylinder gasoline engine, judge whether the operating mode that engine is run at present is in pinking operating mode
Region, if the operating condition of engine is not at pinking operating mode, go to the 6th step；
If the 3, the current operating condition of engine is in pinking operating mode, judge whether each cylinder occurs pinking one by one, if do not had
Pinking occurs for cylinder, goes to the 5th step；
If the 4, ECU detects that pinking occurs for certain cylinder, angle of ignition control is carried out to the cylinder by existing knock control logic,
The angle of ignition is carried out to the cylinder and progressively reduces control, untill being reduced to the cylinder and being in pinking border KBL points；
If the 5, ECU detects a certain cylinder or pinking does not occur for a few cylinders, ECU is then to non-pinking cylinder in the existing angle of ignition
On the basis of, then the angle of ignition is gradually increased with identical step-length, until increasing to the cylinder is in pinking border（KBL points）Untill；Its
In gradually increase the angle of ignition step-length scope be 0.1 °C of A-1 °C of A.
If the 6, the current operating condition of engine is in non-pinking operating mode, based on the optimal AI50 points calibrated before,
Judge whether the AI50 of each cylinder is in optimum position, criterion one by one:∣ optimal AI50-AI50i ∣≤1 °C A, i represent
Several cylinders.If it is determined that the AI50 of a certain cylinder or a few cylinders is not at optimal AI50 positions, the 8th step is gone to；
The 7th, if ECU detects that the AI50 of a certain cylinder or a few cylinders is exactly in optimal AI50 positions, according to existing point
Fiery angle MAP exports the angle of ignition；
The 8th, if the AI50 that ECU detects a certain cylinder or a few cylinders follows these steps to carry out not in optimal AI50 positions：
（1）The AI50 and optimal AI50 of current cylinder difference are calculated first；
（2）According to current AI50 and optimal AI50 difference, and it is fitted between obtained AI50 differences and angle of ignition difference
Mathematical relationship, obtain the angle of ignition that current cylinder needs to compensate；
（3）Carried out using compensating the angle of ignition and the angle of ignition of summation as the current cylinder final output of the angle of ignition MAP output angles of ignition
Igniting.
The inventive method is based on burn center of gravity and pinking feedback control, the angle of ignition of each cylinder of independent control, is had
Positive technique effect below：
（1）By angle of ignition single cylinder independent control, the angle of ignition can be made to be learnt by oneself in pinking and non-pinking condition range
Practise, engine is made the angle of ignition and combustion phase in the range of full working scope all in optimum position, to improve burning quality
And fuel economy.
（2）By angle of ignition single cylinder independent control, multi-cylinder gasoline engine can be improved due to each caused by design, assembly problem
Each cylinder combustion wave rate and degradation problem caused by the difference of cylinder mixed gas quality.
Brief description of the drawings
Fig. 1 is each cylinder combustion wave rate example of certain 1.5TGDI multi-cylinder gasoline engine；
Fig. 2 is the structural representation for the system for realizing control method；
Fig. 3 is the control flow chart of this control method；
Fig. 4 is the angle of ignition MAP of certain four-cylinder gasoline machine；
Fig. 5 is certain four-cylinder gasoline machine pinking and non-pinking conditioned area schematic diagram；
Fig. 6 is the optimal AI50 arteries and veins spectrograms of the non-pinking conditioned area of certain four-cylinder gasoline machine；
Fig. 7 is the matched curve and formula of certain four-cylinder gasoline machine AI50 difference and angle of ignition difference.
Embodiment
The present invention is described in further detail below in conjunction with the embodiment that accompanying drawing provides.
Reference picture 2, realizing the control system of this multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling includes multi-cylinder gasoline
Machine 1, the blast pipe 2 being connected on multi-cylinder gasoline engine 1, exhaust main 3, exhaust manifold 4, air filter 12, air inlet pipe 11, air inlet are total
Pipe 9 and inlet manifold 8, the angle of ignition system 5 being arranged on multi-cylinder gasoline engine, cylinder pressure check equipment 6, injection system 7, air throttle
10th, electronic control unit ECU13, speed probe device 14 and accelerator pedal sensor 15.
Injection system 7 can be arranged in inlet manifold 8 and can also be arranged in the cylinder of multi-cylinder gasoline engine 1, cylinder pressure inspection
Equipment 6 is looked into be arranged in each cylinder of multi-cylinder gasoline engine 1, obtain cylinder pressure signal method include but is not limited to cylinder pressure sensor,
The means such as gas current.Cylinder pressure checks that the quantity of equipment is equal with the number of cylinders of multi-cylinder gasoline engine.ECU ECU13 respectively with
Multi-cylinder gasoline engine 1, ignition system 5, cylinder pressure check that equipment 6, injection system 7, air throttle 10, speed probe 14 and throttle are stepped on
The electric signal of plate sensor 15 connects.From the point of view of system layout, cylinder pressure is set to check equipment respectively in each cylinder, while utilize cylinder
The knock detection function of signal substitution detonation sensor is pressed, but knock control logic and control method use existing method.
Referring to Fig. 3, illustrate this multi-cylinder gasoline engine angle of ignition single cylinder below by two embodiments of certain four-cylinder gasoline machine
Method for independently controlling, the service condition of embodiment are as follows：
First, according to the characteristic of certain four-cylinder gasoline machine, the angle of ignition MAP of the engine is calibrated respectively, sees Fig. 4；Pinking and non-
The line of demarcation of knocking zone, sees Fig. 5；The optimal AI50 positions MAP of non-knocking zone, is shown in Fig. 6；And AI50 differences and the angle of ignition
The matched curve of difference and mathematical relationship, are shown in Fig. 7.
Embodiment 1：
When the operating mode of four-cylinder gasoline machine operation is 2400rpm, IMEP=500kpa, the angle of ignition MAP output angles of ignition are 35 °C of A/
BTDC, measure the 1st, 2,3, the Actual combustion position of centre of gravity AI50 of 4 cylinders be respectively 12.5,7.5,8,11 °C of A/ATDC, and the work
The optimal burning position of centre of gravity AI50 of condition is 8 °C of A/ATDC, as follows using the control method of the present invention, rate-determining steps：
1）ECU presses detection device 6 according to the cylinder of air throttle 10, speed probe 14, accelerator pedal sensor 15 and each cylinder
Signal obtains the rotating speed and load of four-cylinder gasoline machine（2400rpm&IMEP=500kpa）And the pinking demarcated and non-pinking
The line of demarcation in region（See Fig. 5）, judge that the operating mode is in non-pinking conditioned area；
2）Judgement the 1st, 2,3, the Actual combustion position of centre of gravity AI50 and the optimal AI50 of the operating mode of 4 cylinders one by one（8°CA/ATDC）
Difference, draw：1st, 2,3, the Actual combustion position of centre of gravity AI50 and optimal AI50 of 4 cylinders difference be respectively, 4.5,0.5,
0、3°CA.Therefore, the 2nd, the AI50 differences of 3 cylinders are less than 1 °C of A, go to step 3）；1st, the AI50 differences of 4 cylinders are more than 1 °C of A, turn step
It is rapid 4);
3）Because the 2nd, the Actual combustion position of centre of gravity AI50 and optimal AI50 of 3 cylinders difference are less than 1 °C of A, then 2,3 cylinders igniting
Angle is directly according to angle of ignition MAP（See Fig. 4）Output, then the 2nd, the angle of ignition of 3 cylinders be 35 °C of A/BTDC；
4）Because the 1st, the Actual combustion position of centre of gravity AI50 and optimal AI50 of 4 cylinders difference are more than 1 °C of A, respectively 4.5 and 3 °
CA, the mathematical relationship of difference and angle of ignition difference matched curve further according to AI50（Such as Fig. 7）Obtain the benefit of the 1st, the 4 cylinder angles of ignition
It is respectively 5.4 °C of A and 3.7 °C of A to repay angle
5）Then the cylinder of operating mode the 1st igniting final output value is 40.4 °C of A/BTDC（35+5.4=40.4°CA/BTDC）；
4th cylinder angle of ignition final output value is 38.7 °C of A/BTDC（35+3.7=38.7°CA/BTDC）.
Embodiment 2：
When the operating mode of four-cylinder gasoline machine operation is 2400rpm, IMEP=1800kpa, the angle of ignition of angle of ignition MAP outputs is 8 °
CA/BTDC, the four-cylinder gasoline machine the 2nd, 3 cylinders occur pinking, the 1st, 4 cylinders but without occur pinking, using the present invention control
Method, rate-determining steps are as follows：
1）ECU is according to the rotating speed and load of engine（2400rpm&IMEP=1800kpa）And pinking and the boundary of non-knocking zone
Line（See Fig. 5）, judge that the operating mode is in pinking conditioned area；
2）According to knock detection, engine the 2nd, 3 cylinders occur pinking, the 1st, 4 without there are obvious phenomenon of detonations；
3）ECU carries out knock control to the 2nd, 3 cylinders according to existing knock control logic；1st, the control of 4 cylinders goes to step 4）；
4）Because pinking situation do not occur in the 1st, 4 cylinders, then with 0.5 °C of A step-length on the basis of the 1st, the existing angle of ignition of 4 cylinders
The gradually increase angle of ignition.Often increase once, be all made whether that the judgement of pinking occurs：If pinking does not occur, continue with
0.5 °C of A step-length continues to increase the angle of ignition, until increasing to the pinking border of the cylinder（KBL points）；If there is pinking in the cylinder by
According to knock control logic control, i.e., the angle of ignition is carried out to the cylinder and progressively reduce control, until being reduced to the cylinder is in pinking border
Untill KBL points.
Claims (9)
1. a kind of multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling, it is characterised in that including step：
（1）Whether the conditioned area that judgement engine is run is in pinking conditioned area：
（2）If engine operates in non-pinking conditioned area, best combustion position of centre of gravity AI50 is contrasted one by one and each cylinder is actual
Burn position of centre of gravity AI50 difference, according to the angle of ignition of the separately adjustable each cylinder of difference, make the burning position of centre of gravity AI50 of each cylinder
All control in optimum position, so as to eliminate uncontrollable phenomenon of the single angle of ignition to gaseous mixture difference；
If engine is transported in knocking zone, if detecting that pinking occurs for certain cylinder, carried out by existing knock control；If inspection
Measure cylinder and pinking does not occur, then the angle of ignition is gradually increased with identical step-length, until the angle of ignition is increased to pinking border KBL
Point, so as to improve the fuel economy of engine.
2. multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim 1, it is characterised in that the step
（1）It is the rotating speed and load according to multi-cylinder gasoline engine, judges whether the operating mode that engine is run at present is in pinking conditioned area.
3. multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim 1, it is characterised in that the step
（2）Including：
（2.1）If the operating condition of engine is not at pinking operating mode, go to（2.5）Step；
（2.2）If the current operating condition of engine is in pinking operating mode, ECU judges whether each cylinder occurs pinking one by one, such as
Fruit does not have cylinder pinking, goes to（2.4）Step；
（2.3）If ECU detects that pinking occurs for certain cylinder, progressively reduce the angle of ignition of the cylinder, until being reduced at the cylinder
Untill the KBL points of pinking border；
（2.4）If ECU detects a certain cylinder or pinking does not occur for a few cylinders, ECU is then to non-pinking cylinder in existing igniting
On the basis of angle, the angle of ignition is gradually increased with identical step-length, untill increasing to the cylinder and being in pinking border KBL points；
（2.5）If the current operating condition of engine is in non-pinking operating mode, based on the best combustion center of gravity calibrated before
Position AI50 points, ECU judge whether the burning position of centre of gravity AI50 points of each cylinder are in optimum position one by one, if it is decided that go out a certain
The burning position of centre of gravity AI50 points of cylinder or a few cylinders are not at optimum position, go to（2.7）Step；
（2.6）If ECU detects that the AI50 of a certain cylinder or a few cylinders is exactly in optimal AI50 positions, according to existing
Angle of ignition MAP exports the angle of ignition；
（2.7）If ECU detects the AI50 of a certain cylinder or a few cylinders not in optimal AI50 positions, follow these steps into
OK：
The burning position of centre of gravity AI50 and best combustion position of centre of gravity AI50 obtained by calibrating of current cylinder difference are calculated first；
Obtained AI50 differences and point is fitted according to current AI50 and optimal AI50 difference, and when being demarcated to multi-cylinder gasoline engine
Mathematical relationship between fiery angular difference value, obtain the angle of ignition that current cylinder needs to compensate；
Lighted a fire using compensating the angle of ignition and the angle of ignition of summation as the current cylinder final output of the angle of ignition MAP output angles of ignition
Control.
4. multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim 3, it is characterised in that the judgement
Whether the criterion in optimum position is the burning position of centre of gravity AI50 points of each cylinder:The optimal AI50-AI50i ∣≤1 °C A of ∣
, which cylinder i represents, and works as actual measurement AI50<Optimal AI50, the angle of ignition is toward direction regulation is reduced, as actual measurement AI50>Optimal AI50,
The angle of ignition is adjusted toward augment direction.
5. multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim 3, it is characterised in that the igniting
The step-length scope control at angle is in 0.1 °C of A-1 °C of A.
6. the multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim any one of 1-5, it is characterised in that
This control method also needs to demarcate multi-cylinder gasoline engine, obtains following message：
In the range of full working scope, the knocking zone of Multi-Cylinder Diesel Engine and non-knocking zone are calibrated；
Calibrate the best combustion position of centre of gravity AI50 of each operating point of non-knocking zone；
The knock control demarcation of engine；
The angle of ignition MAP of multi-cylinder gasoline engine, i.e., the consistent angle of ignition of each cylinder output valve；
The curve between angle of ignition difference and AI50 differences is fitted, obtains corresponding mathematical relationship.
7. the multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling according to claim any one of 1-5, it is characterised in that
The control method needs to obtain the cylinder pressure signal of each cylinder, and the method for obtaining cylinder pressure signal includes but is not limited to cylinder pressure sensing
The means such as device, gas current, then give cylinder pressure signal real-time delivery to ECU processing.
8. a kind of control system for realizing multi-cylinder gasoline engine angle of ignition single cylinder method for independently controlling described in claim 1-7, including
Multi-cylinder gasoline engine（1）, the angle of ignition system that is arranged on multi-cylinder gasoline engine（5）, cylinder pressure detection device（6）, injection system（7）、
Air throttle（10）, electronic control unit ECU（13）, speed probe（14）And the gas pedal being arranged in gas pedal passes
Sensor（15）；Characterized in that, a cylinder pressure detection device is set per cylinder（6）, the ECU ECU（13）Respectively with multi-cylinder vapour
Oil machine（1）Ignition system（5）, cylinder pressure detection device（6）, injection system（7）, air throttle（10）, speed probe（14）With
And accelerator pedal sensor（15）Electric signal connects；
Whether the conditioned area that the ECU ECU judgements engine is run is in pinking conditioned area：
If engine operates in non-pinking conditioned area, ECU ECU then contrast one by one best combustion position of centre of gravity AI50 and
Each cylinder Actual combustion position of centre of gravity AI50 difference, the point for the position of centre of gravity AI50 separately adjustable each cylinder of difference that burnt according to each cylinder
Fiery angle, the burning position of centre of gravity AI50 of each cylinder is set all to control in optimum position, so as to eliminate the single angle of ignition to gaseous mixture difference
Uncontrollable phenomenon；
If engine is transported in knocking zone, if detecting that pinking occurs for certain cylinder, ECU ECU then presses existing knock control
Carry out, give ignition system control signal；If detecting that pinking does not occur for cylinder, ECU ECU then controls ignition system
The angle of ignition is gradually increased with identical step-length, until the angle of ignition is increased to pinking border KBL points, so as to improve the combustion of engine
Oily economy.
9. control system according to claim 8, it is characterised in that：The ECU ECU is according to air throttle（10）、
Speed probe（14）, accelerator pedal sensor（15）And the cylinder pressure detection device of each cylinder（6）Signal obtain multi-cylinder gasoline
The rotating speed and load of machine, judge whether the operating mode that engine is run at present is in pinking conditioned area.
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| CN108915883A (en) * | 2018-07-05 | 2018-11-30 | 武汉理工大学 | A kind of spark ignition engine super detonation monitoring system and suppressing method |
| CN112682241A (en) * | 2020-12-29 | 2021-04-20 | 联合汽车电子有限公司 | Method and device for controlling ignition timing of engine |
| CN113738555A (en) * | 2021-08-20 | 2021-12-03 | 合众新能源汽车有限公司 | Ignition angle correction method and device |
| CN114233500A (en) * | 2021-12-22 | 2022-03-25 | 潍柴动力股份有限公司 | Control method for working uniformity of cylinders of large-cylinder-diameter diesel engine and diesel engine |
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| CN112682241B (en) * | 2020-12-29 | 2022-10-04 | 联合汽车电子有限公司 | Method and device for controlling ignition timing of engine |
| CN113738555A (en) * | 2021-08-20 | 2021-12-03 | 合众新能源汽车有限公司 | Ignition angle correction method and device |
| CN114233500A (en) * | 2021-12-22 | 2022-03-25 | 潍柴动力股份有限公司 | Control method for working uniformity of cylinders of large-cylinder-diameter diesel engine and diesel engine |
| CN114233500B (en) * | 2021-12-22 | 2024-02-20 | 潍柴动力股份有限公司 | Control method for working uniformity of each cylinder of large-cylinder-diameter diesel engine and diesel engine |
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