CN115142972B - Control method, device and system for engine pre-ignition runaway - Google Patents
Control method, device and system for engine pre-ignition runaway Download PDFInfo
- Publication number
- CN115142972B CN115142972B CN202110338262.9A CN202110338262A CN115142972B CN 115142972 B CN115142972 B CN 115142972B CN 202110338262 A CN202110338262 A CN 202110338262A CN 115142972 B CN115142972 B CN 115142972B
- Authority
- CN
- China
- Prior art keywords
- ignition
- cylinder
- current
- engine
- state
- Prior art date
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000446 fuel Substances 0.000 claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 description 38
- 238000001514 detection method Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F02D41/02—Circuit arrangements for generating control signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- 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
- F02D41/30—Controlling fuel injection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention relates to the technical field of engines, in particular to a control method, a device and a system for controlling the out-of-control of the pre-ignition of an engine, which comprise the following steps: acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil injector and the current opening of an accelerator pedal; according to the current state of the first cylinder in a pre-ignition state and the current state of the fuel injector in a fuel injection state, controlling the fuel cut of the first cylinder; and according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero, the first cylinder is controlled to recover oil supply and the second cylinder is controlled to cut off oil, and the situation that pre-ignition of medium and large loads is out of control is effectively restrained.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a control method, a device and a system for controlling the out-of-control of the pre-ignition of an engine.
Background
In the prior art, the requirements of various national regulations on automobile emission and oil consumption are higher and higher, and the small-sized supercharging of the engine is an effective method for meeting the requirements, but the small-sized supercharging of the engine can generate a negative problem, namely, low-speed and high-load pre-ignition. The pre-ignition refers to abnormal combustion in which the gas-oil mixture reaches an autoignition condition to cause a large area autoignition phenomenon before normal ignition. And thus cannot be prevented by retarding the ignition angle, which is quite different from conventional knocking. When pre-ignition occurs, very high combustion temperatures and pressures (typically maximum burst pressures greater than 100 bar) are typically generated, accompanied by high frequency oscillations. The damage of the pre-combustion to the engine is great, and the spark plug is disabled (electrode burn, ceramic fracture and fire), the piston ring is broken, the top of the piston is ablated, the connecting rod is bent and the like, so that the engine is damaged. For small displacement supercharged engines that are prone to pre-combustion, a pre-combustion control method is also essential in addition to pre-combustion control.
There are two control methods for the engine to cope with pre-ignition. The first is air-fuel ratio enrichment, adjusting variable valve timing and limiting load. This approach sacrifices some fuel consumption and emissions, but guarantees a significant portion of the power. The second is to cut off the fuel to the pre-ignition cylinder. This approach is a further measure in the event that the first approach fails to suppress pre-ignition, sacrifices fuel consumption, emissions, and engine jerks, but ensures basic power and engine safety.
The method of fuel cut of the pre-combustion cylinder is generally adopted, and fuel supply is recovered after fuel cut occurs under some triggering conditions (such as throttle homing, ECU power failure and the like). Before triggering these conditions, however, the other cylinders are out of control with pre-ignition, and the ECU will not fuel the cylinders, resulting in continuous pre-ignition. This is because if both cylinders are de-oiled, the car loses half the power and the engine is severely jerked.
Therefore, in the prior art, the control method for controlling the engine to be out of control in the early combustion cannot cope with the situation that the early combustion is out of control in multiple cylinders.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, the control method for controlling the engine to be out of control in the pre-combustion cannot cope with the situation that the multi-cylinder is out of control in the pre-combustion.
In order to achieve the above purpose, the invention provides a control method for controlling the engine pre-ignition runaway, which comprises the following specific steps:
acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil injector and the current opening of an accelerator pedal;
according to the current state of the first cylinder in a pre-ignition state, and according to the current state of the fuel injector in a fuel injection state, controlling the fuel cut of the first cylinder;
and controlling the first cylinder to recover oil supply and the second cylinder to cut oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
Optionally, the step of being in the pre-ignition state according to the current state of the first cylinder further includes:
acquiring a pre-ignition threshold value and a current pre-ignition integral value of the first cylinder;
controlling a counter to count a pre-ignition count value according to the pre-ignition integral value of the first cylinder being greater than the pre-ignition threshold value;
and detecting that the current state of the first cylinder is in a pre-ignition state according to the pre-ignition count value being greater than a preset pre-ignition frequency threshold.
Optionally, the acquiring the pre-ignition threshold includes:
acquiring the current load of an engine and the current rotating speed of the engine;
the pre-ignition threshold is obtained from a current load of the engine and a current rotational speed of the engine.
Optionally, the acquiring the current pre-ignition integrated value of the first cylinder includes:
and acquiring the value of the knock sensor of the first cylinder, and acquiring the current pre-ignition integral value of the first cylinder according to the value of the knock sensor of the first cylinder.
Optionally, the controlling the counter to count the pre-ignition count value further includes:
and controlling the pre-ignition count value to be reduced according to the pre-ignition count value not larger than a preset pre-ignition frequency threshold value.
Optionally, before the step of obtaining the current state of the first cylinder and the current state of the second cylinder, the method further includes:
acquiring a current load of the engine, a current water temperature of the engine and a current state of a knock sensor;
and carrying out the next step according to the condition that the current load of the engine is larger than the preset load, the current water temperature of the engine is larger than the preset water temperature and the current state of the knock sensor is the working state.
Optionally, the controlling the oil cut of the first cylinder further includes:
and controlling the counter to clear the pre-ignition count value.
Optionally, the step of being in the pre-ignition state according to the current state of the first cylinder further includes:
and judging that the current state of the first cylinder is in a pre-ignition state in the power stroke time of the engine.
The invention of the present application also provides a control device for controlling engine pre-ignition runaway, which is used for executing the control method for controlling engine pre-ignition runaway, wherein the control device for controlling engine pre-ignition runaway comprises: an acquisition unit, and an oil control unit, wherein:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil sprayer and the current opening of an accelerator pedal;
the oil control unit is used for controlling the oil break of the first cylinder according to the current state of the first cylinder in a pre-ignition state and the current state of the oil sprayer in an oil spraying state; and controlling the first cylinder to recover oil supply and the second cylinder to cut oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
Another aspect of the present invention also proposes a control system for controlling engine pre-ignition runaway, comprising a control device for controlling engine pre-ignition runaway as described above;
the control device for controlling the engine pre-ignition runaway further comprises: an ECU controller;
the ECU controller controls the opening or closing of the fuel injector of the first cylinder;
and the ECU controller is used for controlling the opening or closing of the fuel injectors of the second cylinders respectively.
The embodiment of the invention has the following technical effects:
according to the control method for controlling the engine to be in the pre-combustion state according to the current state of the first cylinder, the fuel cut of the first cylinder is controlled according to the current state of the fuel injector in the fuel injection state, the fuel supply is recovered by the first cylinder according to the current state of the second cylinder in the pre-combustion state or the fuel cut of the second cylinder is controlled according to the current opening degree of the accelerator pedal being zero, the pre-combustion of medium and large load is effectively inhibited, and the situation that the multi-cylinder is in the pre-combustion out of control can be solved.
Drawings
FIG. 1 is a flow chart of a method for controlling engine pre-ignition runaway provided in embodiment 1 of the present invention;
FIG. 2 is a logic diagram of a control method for engine pre-ignition runaway in the embodiment of FIG. 1;
FIG. 3 is a logic diagram of a pre-ignition flag calculation in a control method for engine pre-ignition runaway in the embodiment of FIG. 2;
fig. 4 is a logic diagram of a pre-ignition detection activation flag in a control method for engine pre-ignition runaway in the embodiment of fig. 2.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the present invention, a knock sensor: is to detect engine vibrations. If pre-ignition occurs, the sensor detects an abnormal vibration frequency. Therefore, the knock sensor must be operating properly when detecting pre-ignition.
The various components involved in the various embodiments of the engine pre-ignition runaway control apparatus of the present application are explained above for ease of understanding by those skilled in the art. It should be noted that the components listed above are not necessarily included in the control device for controlling the engine pre-ignition runaway in the present application.
As shown in fig. 1, the control method for controlling the engine pre-ignition runaway provided by the application comprises the following specific steps:
s1, acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil sprayer and the current opening of an accelerator pedal;
s2, according to the fact that the current state of the first cylinder is in a pre-ignition state, according to the fact that the current state of the oil sprayer is in an oil spraying state, controlling oil cut-off of the first cylinder;
and S3, controlling the first cylinder to recover oil supply and the second cylinder to cut off oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
Specifically, after the fuel cut is executed, the condition of the pre-combustion of other cylinders is continuously detected, if the pre-combustion of other cylinders is out of control, the fuel supply is restored to the fuel cut cylinder, and the fuel cut is carried out to other cylinders with pre-combustion. Under the condition of keeping basic power, a certain cylinder is prevented from being continuously pre-combusted for a long time, and the engine is prevented from being damaged.
Optionally, the step of being in the pre-ignition state according to the current state of the first cylinder further includes:
s21, acquiring a pre-ignition threshold value and a current pre-ignition integral value of a first cylinder;
s22, controlling a counter to count a pre-combustion count value according to the fact that the pre-combustion integral value of the first cylinder is larger than a pre-combustion threshold value;
s23, detecting that the current state of the first cylinder is in a pre-ignition state according to the fact that the pre-ignition count value is larger than a preset pre-ignition frequency threshold value.
Specifically, the current state of the first cylinder can be detected to be in the pre-ignition state by the pre-ignition count value being greater than the preset pre-ignition number threshold, and the detection method of the pre-ignition state of the second cylinder is identical to the detection method of the pre-ignition state of the first cylinder.
Optionally, obtaining the pre-ignition threshold includes: acquiring the current load of the engine and the current rotating speed of the engine; the pre-ignition threshold is obtained from a current load of the engine and a current rotational speed of the engine.
Specifically, the pre-ignition is made by artificial experiments, the engine is adjusted to a specific rotational speed and a specific load, and a pre-ignition integrated value of the first cylinder is obtained, and the pre-ignition integrated value of the first cylinder is a pre-ignition threshold value. The pre-ignition threshold is a value calibrated in advance.
Optionally, acquiring the current pre-ignition integrated value of the first cylinder includes:
a value of a knock sensor of a first cylinder is acquired, and a current pre-combustion integrated value of the first cylinder is acquired based on the value of the knock sensor of the first cylinder.
Specifically, the knock sensor output signal is subjected to integral calculation to obtain the pre-ignition integral value.
Optionally, according to the fact that the early-combustion integral value of the first cylinder is larger than the early-combustion threshold value, the control counter further comprises after counting the early-combustion count value:
specifically, the pre-ignition count value is controlled to decrease in accordance with the pre-ignition count value not being greater than a preset pre-ignition number threshold.
Optionally, before obtaining the current state of the first cylinder and the current state of the second cylinder, the method further includes: acquiring the current load of an engine, the current water temperature of the engine and the current state of a knock sensor; and carrying out the next step according to the condition that the current load of the engine is larger than the preset load, the current water temperature of the engine is larger than the preset water temperature and the current state of the knock sensor is the working state.
Specifically, according to the current load of the engine being greater than the preset load, the current water temperature of the engine being greater than the preset water temperature, and the current state of the knock sensor being the operating state, the pre-ignition detection function is activated, and if not activated, a pre-ignition miss judgment condition occurs, and further engine damage may occur.
Optionally, after controlling the oil break of the first cylinder, the method further comprises: the control counter clears the pre-ignition count value.
Specifically, if the number of times of pre-ignition is less than the pre-ignition number threshold for a period of time, the pre-ignition count is gradually reduced to 0 or pre-ignition is detected again during the period of reduction, so that the count is increased.
Optionally, the step of being in the pre-ignition state according to the current state of the first cylinder further includes: and judging that the current state of the first cylinder is in a pre-ignition state in the power stroke time of the engine.
Specifically, whether pre-combustion occurs or not is judged, and the cycle time of the judgment is the power stroke time of the engine, for example, the four-cylinder engine rotates for twice to do work, and the judgment is carried out twice.
The invention of the application also provides a control device for controlling the engine to be in the premature-ignition runaway, which is used for executing the control method for controlling the engine to be in the premature-ignition runaway, wherein the control device for controlling the engine to be in the premature-ignition runaway comprises the following components: an acquisition unit, and an oil control unit, wherein:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil sprayer and the current opening of an accelerator pedal;
the oil control unit is used for controlling the oil break of the first cylinder according to the current state of the first cylinder in a pre-ignition state and the current state of the oil sprayer in an oil spraying state; and controlling the first cylinder to recover oil supply and the second cylinder to cut off oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
The invention also provides a control system for controlling the engine to be out of control in the premature combustion, which comprises the control device for controlling the engine to be out of control in the premature combustion;
the control device for controlling the engine pre-ignition runaway further comprises: an ECU controller;
the first cylinder is provided with an oil sprayer, and the ECU controller controls the oil sprayer of the first cylinder to be opened or closed;
and the ECU controller is used for controlling the opening or closing of the fuel injectors of the second cylinders respectively.
Specifically, the fuel injector on the first cylinder is controlled to be closed to cut off fuel, and the fuel injector on the second cylinder is controlled to supply fuel.
The control method for controlling the engine pre-ignition runaway provided by the invention comprises the following specific steps: the invention acquires a water temperature signal, a load signal, a rotating speed signal and a knock sensor signal, then judges whether the pre-combustion is carried out or not, and finally takes measures to inhibit the continuous occurrence of the pre-combustion. The first step is to determine if the pre-ignition detection is enabled. The enabling conditions are as follows: the current load is greater than a preset load limit; the current water temperature exceeds a preset water temperature limit value; the knock sensor is in a normal operating state. And the second step is to calculate the pre-ignition threshold value of the current working condition point according to the current rotating speed and the current load. The pre-ignition threshold value is different along with the change of the rotating speed load and is interpolated by a three-dimensional curved surface. And thirdly, judging whether the pre-combustion occurs or not, and finally outputting a pre-combustion zone bit value. The cycle time is the power stroke time of the engine, for example, the four-cylinder engine rotates for twice to do work, and the cycle time is judged twice. And the fourth step is to count the number of times of pre-combustion in a period of time, and if the number of times of pre-combustion is larger than a threshold value of the number of times of pre-combustion, judging that the cylinder is out of control in pre-combustion, and cutting off the fuel in the cylinder. If the number of pre-fires in a period of time is less than the pre-fire number threshold, the pre-fire count is gradually reduced to 0 or pre-fires are detected again during the period of reduction, such that the count is increased. And fifthly, after the fuel cut is carried out, the condition of the pre-combustion of other cylinders is continuously detected, and if the pre-combustion of other cylinders is out of control, the fuel supply is restored to the other cylinders, and the fuel cut is carried out to the other cylinders. Under the condition of keeping basic power, a certain cylinder is prevented from being continuously pre-combusted for a long time, and the engine is prevented from being damaged.
As shown in fig. 2 to 4, the specific logic of the control method for controlling the engine pre-ignition runaway provided by the invention is as follows: (1) The knock sensor is in operation, i.e. knock sensor activation flag = 1; (2) The engine load is larger than the load limit value, and the occurrence of pre-ignition is impossible due to the fact that the load is too small; (3) The water temperature of the engine is larger than the water temperature limit value, and the occurrence of the pre-ignition is impossible due to the fact that the water temperature is too low; (4) The three conditions are met, so that the pre-ignition detection function is activated, namely, the pre-ignition detection activation flag bit is set; (5) Calculating to obtain a pre-ignition threshold value of the current engine according to the rotating speed and the load, wherein the pre-ignition threshold value is obtained by pre-ignition calibration; (6) Under the condition that the pre-ignition detection activation flag position is larger than the pre-ignition threshold value, setting the pre-ignition flag position; (7) The pre-ignition flag position is once, and the pre-ignition count is increased by one. When the pre-ignition count is larger than the pre-ignition runaway frequency threshold value and the fuel cut-off flag bit is equal to 0, the pre-ignition runaway flag bit is set, and the fuel cut-off of the pre-ignition runaway cylinder is triggered; (8) When the fuel cut-off flag is set, the pre-ignition calculation is set to zero, and the pre-ignition runaway flag is set to zero; (9) And after the oil-cut flag bit is set, starting to monitor whether the accelerator pedal is zeroed or whether the premature ignition out-of-control flag bit is zero, and if one of the oil-cut flag bits is true, recovering oil cut of the cylinder which is originally cut off, wherein the oil-cut flag bit is zero.
In summary, according to the control method for controlling the engine pre-ignition runaway, the current state of the first cylinder is in the pre-ignition state, the current state of the fuel injector is in the fuel injection state, the fuel cut of the first cylinder is controlled, the current state of the second cylinder is in the pre-ignition state, or the current opening of the accelerator pedal is zero, the fuel supply of the first cylinder is restored, the fuel cut of the second cylinder is controlled, the pre-ignition of medium and large loads is effectively inhibited, and the situation that the pre-ignition of multiple cylinders is out of control can be solved.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are merely used to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (9)
1. The control method for controlling the engine pre-ignition runaway is characterized by comprising the following specific steps:
acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil injector and the current opening of an accelerator pedal;
according to the current state of the first cylinder in a pre-ignition state, and according to the current state of the fuel injector in a fuel injection state, controlling the fuel cut of the first cylinder; the being in a pre-ignition state according to the current state of the first cylinder further includes: acquiring a pre-ignition threshold value and a current pre-ignition integral value of the first cylinder; controlling a counter to count a pre-ignition count value according to the pre-ignition integral value of the first cylinder being greater than the pre-ignition threshold value; detecting that the current state of the first cylinder is in a pre-ignition state according to the pre-ignition count value being greater than a preset pre-ignition frequency threshold;
and controlling the first cylinder to recover oil supply and the second cylinder to cut oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
2. The method of claim 1, wherein the obtaining a pre-ignition threshold comprises:
acquiring the current load of an engine and the current rotating speed of the engine;
the pre-ignition threshold is obtained from a current load of the engine and a current rotational speed of the engine.
3. The method of controlling engine pre-ignition runaway according to claim 1, wherein the obtaining the current pre-ignition integrated value of the first cylinder includes:
and acquiring the value of the knock sensor of the first cylinder, and acquiring the current pre-ignition integral value of the first cylinder according to the value of the knock sensor of the first cylinder.
4. The method for controlling engine pre-ignition runaway according to claim 1, wherein said controlling the counter to count the pre-ignition count value further comprises, based on the pre-ignition integrated value of the first cylinder being greater than the pre-ignition threshold value:
and controlling the pre-ignition count value to be reduced according to the pre-ignition count value not larger than a preset pre-ignition frequency threshold value.
5. The method for controlling engine pre-ignition runaway according to claim 1, wherein the step of acquiring the current state of the first cylinder and the current state of the second cylinder further comprises:
acquiring a current load of the engine, a current water temperature of the engine and a current state of a knock sensor;
and carrying out the next step according to the condition that the current load of the engine is larger than the preset load, the current water temperature of the engine is larger than the preset water temperature and the current state of the knock sensor is the working state.
6. The method of claim 1, further comprising, after said controlling said first cylinder to be fuel cut:
and controlling the counter to clear the pre-ignition count value.
7. The method of controlling engine pre-ignition runaway according to claim 1, wherein the being in a pre-ignition state according to the current state of the first cylinder further comprises:
and judging that the current state of the first cylinder is in a pre-ignition state in the power stroke time of the engine.
8. A control apparatus for controlling engine pre-ignition runaway for performing the control method for engine pre-ignition runaway according to claim 1, characterized by comprising: an acquisition unit, and an oil control unit, wherein:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current state of a first cylinder, the current state of a second cylinder, the current state of an oil sprayer and the current opening of an accelerator pedal;
the oil control unit is used for controlling the oil break of the first cylinder according to the current state of the first cylinder in a pre-ignition state and the current state of the oil sprayer in an oil spraying state; and controlling the first cylinder to recover oil supply and the second cylinder to cut oil according to the fact that the current state of the second cylinder is in a pre-ignition state or the current opening of the accelerator pedal is zero.
9. A control system for engine pre-ignition runaway, the control system comprising the control device for engine pre-ignition runaway of claim 8;
the control device for controlling the engine pre-ignition runaway further comprises: an ECU controller;
the ECU controller controls the opening or closing of the fuel injector of the first cylinder;
and the ECU controller is used for controlling the opening or closing of the fuel injectors of the second cylinders respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338262.9A CN115142972B (en) | 2021-03-29 | 2021-03-29 | Control method, device and system for engine pre-ignition runaway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338262.9A CN115142972B (en) | 2021-03-29 | 2021-03-29 | Control method, device and system for engine pre-ignition runaway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115142972A CN115142972A (en) | 2022-10-04 |
| CN115142972B true CN115142972B (en) | 2023-12-22 |
Family
ID=83404644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110338262.9A Active CN115142972B (en) | 2021-03-29 | 2021-03-29 | Control method, device and system for engine pre-ignition runaway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115142972B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417142U (en) * | 1990-05-31 | 1992-02-13 | ||
| JP2014074336A (en) * | 2012-10-02 | 2014-04-24 | Toyota Motor Corp | Control device of vehicle |
| JP2014156819A (en) * | 2013-02-15 | 2014-08-28 | Toyota Motor Corp | Control unit for internal combustion engine |
| JP2015206347A (en) * | 2014-04-23 | 2015-11-19 | トヨタ自動車株式会社 | Controller for engine |
| CN105386882A (en) * | 2015-10-26 | 2016-03-09 | 重庆长安汽车股份有限公司 | Preignition control method for supercharge non-direct-injection gasoline engine |
| JP2016113949A (en) * | 2014-12-15 | 2016-06-23 | 日産自動車株式会社 | Engine preignition detection device |
| CN106468237A (en) * | 2015-08-21 | 2017-03-01 | 福特环球技术公司 | The method and system controlling for prefiring |
| DE102017112660A1 (en) * | 2016-06-09 | 2017-12-14 | Ford Global Technologies, Llc | SYSTEM AND METHOD FOR REGULATING ENGINE BUTTING OF A VARIABLE LIFTING ENGINE |
| CN108533413A (en) * | 2017-03-01 | 2018-09-14 | 联合汽车电子有限公司 | A kind of engine preignition detecting optimization method and system |
| CN211500811U (en) * | 2020-02-12 | 2020-09-15 | 日立汽车系统(苏州）有限公司 | Engine pre-ignition prevention device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7302932B2 (en) * | 2006-03-17 | 2007-12-04 | Ford Global Technologies, Llc | Pre-ignition detection and mitigation |
| CN103608572B (en) * | 2011-07-11 | 2016-08-17 | 丰田自动车株式会社 | The control device of internal combustion engine |
| US9038596B2 (en) * | 2011-12-02 | 2015-05-26 | Ford Global Technologies, Llc | Method and system for pre-ignition control |
| US9371783B2 (en) * | 2013-11-08 | 2016-06-21 | Ford Global Technologies, Llc | Method and system for improved dilution tolerance |
| US10941703B2 (en) * | 2018-10-25 | 2021-03-09 | Ford Global Technologies, Llc | Method and system for applying engine knock windows |
-
2021
- 2021-03-29 CN CN202110338262.9A patent/CN115142972B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417142U (en) * | 1990-05-31 | 1992-02-13 | ||
| JP2014074336A (en) * | 2012-10-02 | 2014-04-24 | Toyota Motor Corp | Control device of vehicle |
| JP2014156819A (en) * | 2013-02-15 | 2014-08-28 | Toyota Motor Corp | Control unit for internal combustion engine |
| JP2015206347A (en) * | 2014-04-23 | 2015-11-19 | トヨタ自動車株式会社 | Controller for engine |
| JP2016113949A (en) * | 2014-12-15 | 2016-06-23 | 日産自動車株式会社 | Engine preignition detection device |
| CN106468237A (en) * | 2015-08-21 | 2017-03-01 | 福特环球技术公司 | The method and system controlling for prefiring |
| CN105386882A (en) * | 2015-10-26 | 2016-03-09 | 重庆长安汽车股份有限公司 | Preignition control method for supercharge non-direct-injection gasoline engine |
| DE102017112660A1 (en) * | 2016-06-09 | 2017-12-14 | Ford Global Technologies, Llc | SYSTEM AND METHOD FOR REGULATING ENGINE BUTTING OF A VARIABLE LIFTING ENGINE |
| CN108533413A (en) * | 2017-03-01 | 2018-09-14 | 联合汽车电子有限公司 | A kind of engine preignition detecting optimization method and system |
| CN211500811U (en) * | 2020-02-12 | 2020-09-15 | 日立汽车系统(苏州）有限公司 | Engine pre-ignition prevention device |
Non-Patent Citations (3)
| Title |
|---|
| 发动机早燃与控制;赵世来;张治国;;汽车实用技术(第07期);第134-137页 * |
| 基于喷油器优化设计方法对低速早燃的研究;张良勇;蔡伟;;内燃机(第03期);第24-27+32页 * |
| 某GDI发动机早燃超级爆震控制策略试验研究;王福志;苏方旭;刘广丰;;小型内燃机与车辆技术(第02期);第13-17+32页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115142972A (en) | 2022-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5360121B2 (en) | Control method of spark ignition engine and spark ignition engine | |
| EP2672095B1 (en) | Control device for internal combustion engine | |
| JP4873249B2 (en) | Control device for vehicle engine | |
| JP2017020355A (en) | Control device for engine | |
| JP4873250B2 (en) | Pre-ignition detection device for vehicle engine | |
| CN104564483A (en) | Detection device and method for detecting pre-ignition of spark plug ignition type engine | |
| US7131425B2 (en) | Method to control auto-ignition in an internal combustion engine equipped with variable valve timing control | |
| US20130166184A1 (en) | Method and device for setting an emergency operational mode in a system which detects pre-ignitions in a combustion engine, and which contains errors | |
| EP2806145A1 (en) | Method of operating a gas or dual fuel engine | |
| EP3097295A2 (en) | Control device for compression-ignited internal combustion engine | |
| CN108150299A (en) | A kind of supercharging gasoline engine super detonation pre-control method and system | |
| CN115142972B (en) | Control method, device and system for engine pre-ignition runaway | |
| JP4874557B2 (en) | Control device for internal combustion engine | |
| CN111412072B (en) | Control method for reducing pre-ignition frequency of supercharged direct-injection gasoline engine | |
| JP3965905B2 (en) | Compression self-ignition internal combustion engine | |
| CN110080919B (en) | Ignition control method and device, vehicle and storage medium | |
| US9291141B2 (en) | Control device and control method for internal combustion engine | |
| WO2021079665A1 (en) | Internal combustion engine control device | |
| US6240900B1 (en) | Individual knock threshold | |
| US11293395B2 (en) | Control device for engine | |
| GB2387948A (en) | Methods of protecting an internal combustion engine | |
| CN115126613B (en) | Engine pre-ignition control method and device and computer storage medium | |
| EP3023621B1 (en) | Method to detect and control detonation phenomena in an internal combustion engine | |
| JP4911135B2 (en) | Self-ignition combustion detector | |
| JP6323687B2 (en) | Engine control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |