CN114542266A - Pre-combustion chamber structure of double nozzles of engine and control method - Google Patents
Pre-combustion chamber structure of double nozzles of engine and control method Download PDFInfo
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- CN114542266A CN114542266A CN202210436693.3A CN202210436693A CN114542266A CN 114542266 A CN114542266 A CN 114542266A CN 202210436693 A CN202210436693 A CN 202210436693A CN 114542266 A CN114542266 A CN 114542266A
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- control unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
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- 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
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- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a pre-combustion chamber structure of a double-nozzle of an engine and a control method, and relates to the technical field of engines. The engine cylinder is provided with an air inlet manifold connected with the engine cylinder, a nozzle A and a nozzle B are respectively installed in the air inlet manifold, the nozzle A, the nozzle B, the air inlet pressure temperature sensor and the cam rotating speed sensor are respectively and electrically connected with the engine electric control unit, and the nozzle A and the nozzle B are the same in specification and are respectively controlled by the engine electric control unit. The invention is arranged at two nozzles of a single engine cylinder and is respectively controlled by the engine electronic control unit, thereby realizing the adjustment of the working quantity of the nozzles under different engine working loads and being beneficial to improving the fuel combustion condition in the engine.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a pre-combustion chamber structure of a double-nozzle engine and a control method.
Background
The internal combustion engine taking combustible gas as fuel is generally called as a gas fuel engine, is cleaner than the traditional fuel engine, has higher thermal efficiency, and can improve the thermal efficiency of the gas fuel engine by applying the pre-combustion technology so as to obtain more power output.
The gas nozzle used by the large-bore engine cannot realize mass production as the small-bore engine, so that the nozzle price of the large-bore engine is higher, and in order to save cost, a mode of arranging two small nozzles by one cylinder can be adopted, so that the invention provides a design scheme.
Disclosure of Invention
The present invention is directed to a dual nozzle prechamber structure of an engine and a control method thereof, so as to solve the problems mentioned above in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a precombustion chamber structure of engine double jet nozzle, includes engine electrical unit, engine cylinder, intake pressure temperature sensor and cam speed sensor, engine cylinder is provided with air intake manifold and connects with it, air intake manifold installs nozzle A and nozzle B respectively in inside, nozzle A, nozzle B, intake pressure temperature sensor and cam speed sensor respectively with engine electrical unit electric connection.
Furthermore, the specifications of the nozzle A and the nozzle B are the same and are respectively controlled by an engine electronic control unit.
A control method for the dual-nozzle precombustion chamber of engine includes
The number of the nozzles is judged, an engine electronic control unit calculates the gas demand through detecting a cam rotating speed signal and an engine intake manifold pressure temperature signal, and the number of the gas injection nozzles is judged by the engine electronic control unit according to the gas injection quantity and the injection safety allowance of a single nozzle;
the method also comprises A, B nozzle judgment of single nozzle injection, wherein an engine electronic control unit counts, counts and compares the injection times of single-cylinder nozzles, when the engine electronic control unit detects that the injection times of a nozzle A are more than the injection times of a nozzle B and are more than a set value, a single engine cylinder selects the nozzle B to work, and when the engine electronic control unit detects that the injection times of the nozzle B are more than the injection times of the nozzle A and are more than the set value, the single engine cylinder selects the nozzle A to work;
when the spraying times of the nozzle is greater than the set value of the service life of the nozzle, the electronic control unit of the engine sends out a nozzle replacing prompt and replaces the nozzle.
Further, the A, B nozzle determination for the single-nozzle injection is performed when the nozzle number is determined to be a single nozzle, and the nozzles a and B are simultaneously operated when the nozzle number is determined to be a double nozzle.
Furthermore, in the A, B nozzle judgment of single-nozzle injection, the engine electronic control unit counts and compares the injection times of the nozzles of the single engine cylinder, wherein the difference between the injection times of the nozzle A and the injection times of the nozzle B is a calculated value, the calculated value is compared with a set value after being processed, the calculated value is greater than the set value, the nozzle B is started, and the calculated value is smaller than the set value, the nozzle A is started.
Furthermore, the processing method of the calculated value is to take the absolute value of the calculated value and compare the absolute value of the calculated value with the set value.
Furthermore, in the service life alarm and replacement resetting, the spraying times of the nozzle are reset after the nozzle is replaced.
Furthermore, in the service life alarming and replacement resetting, the nozzle A and the nozzle B are provided with independent counting units for counting the opening times of the nozzle A and the nozzle B.
Furthermore, the counting unit sends a signal to the engine electronic control unit, and the engine electronic control unit sends a nozzle replacement prompt.
Furthermore, the value of the set value in the determination of the A, B nozzle sprayed by the single nozzle is between 1 and 3.
Compared with the prior art, the invention has the beneficial effects that:
(1) the two nozzles of a single engine cylinder are arranged and respectively controlled by the engine electric control unit, so that the adjustment of the working quantity of the nozzles under different working loads of the engine is realized, and the fuel combustion condition in the engine is favorably improved.
(2) The double-nozzle pre-combustion chamber structure of the engine and the control method thereof can effectively reduce the work load of the two nozzles and prolong the service life of the two nozzles by judging the A, B nozzle which is injected by a single nozzle in a control strategy and setting the strategy of service life alarm and replacement and reset.
Drawings
FIG. 1 is a schematic block diagram of a single engine cylinder arrangement of the present invention;
fig. 2 is a schematic diagram of a single structure of the present invention.
In the figure: 1. an engine cylinder; 2. an intake manifold; 3. an engine electronic control unit; 4. a nozzle B; 5. a nozzle A; 6. an intake pressure temperature sensor; 7. a cam rotation speed sensor; 8. a cam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.
Examples
In the process of solving the problem of reforming the gas engine with the pre-combustion chamber of the diesel engine, the invention provides a solution of reforming a plurality of diesel oil into a pre-combustion chamber injection gas engine, namely the control strategy of the pre-combustion chamber structure of the double-nozzle engine provided by the invention can be generally applied to the project of reforming the gas engine with the diesel engine, the difficulty of controlling the gas concentration in the pre-combustion chamber is reduced, the electric control gas injection is realized, and the economy of the engine is improved, in particular, the electric control natural gas nozzle is arranged in the pre-combustion chamber structure, the invention aims to describe the gas arrangement of one cylinder of a multi-cylinder engine, two gas nozzles are arranged on an air inlet manifold 2 of a single cylinder of the engine, two gas nozzles A5 and a nozzle B4 are respectively controlled by the ECU, the ECU is the abbreviation of an engine electric control unit 3, the cam rotating speed and the phase signal of the engine are connected into the ECU, and the pressure and temperature signals of the air inlet manifold 2 are connected into the ECU, in the prior art, two nozzles of each cylinder are connected in series or in parallel, a plurality of nozzles of each cylinder are not independently controlled, and the gas nozzle used by the large-cylinder-diameter engine cannot realize mass production like the small-cylinder-diameter engine, so the nozzle price of the large-cylinder-diameter engine is higher.
As shown in fig. 1-2, the present invention provides a technical solution: the utility model provides a prechamber structure of engine double nozzle, including engine electrical unit 3, engine cylinder 1, inlet pressure temperature sensor 6 and cam speed sensor 7, engine cylinder 1 is provided with air intake manifold 2 and connects with it, nozzle A5 and nozzle B4 are installed respectively to air intake manifold 2 inside, nozzle A5, nozzle B4, inlet pressure temperature sensor 6 and cam speed sensor 7 are respectively with engine electrical unit 3 electric connection, nozzle A5 and nozzle B4's the same and controlled respectively by engine electrical unit 3 of specification.
A control method of a double-nozzle precombustion chamber of an engine aims to reduce the load of nozzles in an engine cylinder 1, select proper nozzle working quantity according to the working condition of the engine, reserve the service life of the nozzles, send a replacement signal after reaching a preset value to ensure that the whole engine is in a good running state, wherein the nozzle quantity judgment is included, an engine electronic control unit 3 calculates the gas demand quantity by detecting a cam rotating speed signal and a pressure and temperature signal of an engine intake manifold 2, and the engine electronic control unit 3 judges the gas injection nozzle quantity according to the gas injection quantity and the injection safety margin of a single nozzle.
Secondly, A, B nozzle judgment of single-nozzle injection is further included, the engine electronic control unit 3 counts, statistically compares the injection times of single-cylinder nozzles, when the engine electronic control unit 3 detects that the injection times of the nozzle A5 is greater than that of the nozzle B4, the single-engine cylinder 1 selects the nozzle B4 to operate, when the engine electronic control unit 3 detects that the injection times of the nozzle B4 is greater than that of the nozzle A5, the single-engine cylinder 1 selects the nozzle A5 to operate, the A, B nozzle judgment of the single-nozzle injection is executed under the condition that the nozzle number is judged to be a single nozzle, the nozzle A5 and the nozzle B4 operate simultaneously under the condition that the nozzle number is judged to be a double nozzle, in the A, B nozzle judgment of the single-nozzle injection, the engine electronic control unit 3 counts, statistically compares the nozzle injection times of the single-engine cylinder 1, in a way, the difference between the injection times of the nozzle A5 and the injection times of the nozzle B4 is a calculated value, the calculated value is processed and compared with a set value, the calculated value is larger than the set value and is used for starting a nozzle B4, the calculated value is smaller than the set value and is used for starting a nozzle A5, the absolute value of the calculated value is taken as the processing method of the calculated value, the absolute value of the calculated value is compared with the set value, the value of the set value in the A, B nozzle of single nozzle injection is 1-3, and redundancy and normal operation of an engine are set.
And finally, a service life alarm and replacement reset is included, when the number of nozzle injection times is larger than a nozzle service life set value, the engine electronic control unit 3 sends a nozzle replacement prompt and replaces the nozzle, in the service life alarm and replacement reset, after the nozzle is replaced, the number of nozzle injection times is reset, in the service life alarm and replacement reset, the nozzle A5 and the nozzle B4 are provided with independent counting units to calculate the opening times of the nozzle A5 and the nozzle B4, the counting units send signals to the engine electronic control unit 3, and the engine electronic control unit 3 sends a nozzle replacement prompt.
It should be noted that, different from the traditional arrangement of the nozzles in series or in parallel, the two nozzles of a single engine cylinder 1 are respectively controlled by the engine electric control unit 3, so that only one nozzle works under the working condition of medium and low load, and the two nozzles work simultaneously under the working condition of high load.
It should be noted that the A, B nozzle decision, life alarm, and replacement reset for a single nozzle injection will result in an overall nozzle life greater than gas nozzles used in series or in parallel.
It should be noted that an intake pressure and temperature sensor 6 is arranged inside the intake manifold 2 connected with the engine, so that the pressure and temperature inside the intake manifold 2 can be monitored in real time and processed by the engine electronic control unit 3, and the gas demand can be calculated by using the pressure and temperature.
It should be noted that the cam speed sensor 7 can monitor the cam 8 connected to the engine output transmission mechanism, and the phase change generated by the rotation of the cam 8 is utilized to know the working condition inside the engine through the engine electronic control unit 3, so as to control the ignition timing and the air intake.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a prechamber structure of engine double jet, includes engine electronic control unit (3), engine cylinder (1), intake pressure temperature sensor (6) and cam speed sensor (7), its characterized in that: the engine cylinder (1) is provided with an air inlet manifold (2) connected with the air inlet manifold, a nozzle A (5) and a nozzle B (4) are respectively installed inside the air inlet manifold (2), and the nozzle A (5), the nozzle B (4), an air inlet pressure and temperature sensor (6) and a cam rotating speed sensor (7) are respectively electrically connected with an engine electric control unit (3).
2. The twin nozzle pre-combustion chamber structure of an engine as claimed in claim 1, wherein: the nozzle A (5) and the nozzle B (4) have the same specification and are respectively controlled by the engine electronic control unit (3).
3. A control method of a double-nozzle precombustion chamber of an engine is characterized in that: comprises that
The number of the nozzles is judged, the engine electronic control unit (3) calculates the gas demand through detecting a cam rotating speed signal and a pressure temperature signal of an engine intake manifold (2), and the number of the gas injection nozzles is judged by the engine electronic control unit (3) according to the gas injection quantity and the injection safety allowance of a single nozzle;
the method is characterized by also comprising A, B nozzle judgment of single-nozzle injection, wherein an engine electronic control unit (3) counts, counts and compares the injection times of single-cylinder nozzles, when the engine electronic control unit (3) detects that the injection times of a nozzle A (5) are greater than a set value compared with the injection times of a nozzle B (4), a single engine cylinder (1) selects the nozzle B (4) to work, and when the engine electronic control unit (3) detects that the injection times of the nozzle B (4) are greater than the set value compared with the injection times of the nozzle A (5), the single engine cylinder (1) selects the nozzle A (5) to work;
when the spraying times of the nozzle is greater than the set value of the service life of the nozzle, the engine electric control unit (3) sends out a nozzle replacement prompt and replaces the nozzle.
4. A control method of a two-nozzle pre-chamber of an engine according to claim 3, characterized in that: the A, B nozzle determination for the single-nozzle injection is performed when the number of nozzles is determined to be a single nozzle, and when the number of nozzles is determined to be a double nozzle, the nozzles a (5) and B (4) are operated simultaneously.
5. A control method of a two-nozzle pre-chamber of an engine according to claim 3, characterized in that: in the A, B nozzle judgment of single-nozzle injection, the engine electronic control unit (3) counts and statistically compares the injection times of the nozzles of a single engine cylinder (1) in such a way that the difference between the injection times of the nozzle A (5) and the injection times of the nozzle B (4) is a calculated value, the calculated value is processed and compared with a set value, the nozzle B (4) is started when the calculated value is greater than the set value, and the nozzle A (5) is started when the calculated value is smaller than the set value.
6. The control method of the engine dual nozzle precombustor as claimed in claim 5, characterized in that: the processing method of the calculated value is to take the absolute value of the calculated value and compare the absolute value of the calculated value with a set value.
7. A control method of a two-nozzle pre-chamber of an engine according to claim 3, characterized in that: in the service life alarm and replacement resetting, after the nozzle is replaced, the spraying frequency of the nozzle is reset.
8. A control method of a two-nozzle pre-chamber of an engine according to claim 3, characterized in that: in the service life alarming and replacement resetting process, the nozzle A (5) and the nozzle B (4) are provided with independent counting units to calculate the opening times of the nozzle A (5) and the nozzle B (4).
9. The control method of the engine dual nozzle pre-chamber as set forth in claim 8, wherein: the counting unit sends a signal to the engine electric control unit (3), and the engine electric control unit (3) sends a nozzle replacement prompt.
10. A control method of a two-nozzle pre-chamber of an engine according to claim 3, characterized in that: the value of the set value in the determination of the A, B nozzle sprayed by the single nozzle is between 1 and 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210436693.3A CN114542266B (en) | 2022-04-25 | 2022-04-25 | Pre-combustion chamber structure of double nozzles of engine and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210436693.3A CN114542266B (en) | 2022-04-25 | 2022-04-25 | Pre-combustion chamber structure of double nozzles of engine and control method |
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| CN114542266A true CN114542266A (en) | 2022-05-27 |
| CN114542266B CN114542266B (en) | 2022-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467755A (en) * | 2022-10-13 | 2022-12-13 | 武汉菱电汽车电控系统股份有限公司 | Electric control method for fuel fractional injection of double nozzles of PFI engine |
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