CN114251180B - Method, device, equipment and storage medium for gas engine starting control - Google Patents

Method, device, equipment and storage medium for gas engine starting control Download PDF

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Publication number
CN114251180B
CN114251180B CN202111583962.0A CN202111583962A CN114251180B CN 114251180 B CN114251180 B CN 114251180B CN 202111583962 A CN202111583962 A CN 202111583962A CN 114251180 B CN114251180 B CN 114251180B
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Prior art keywords
engine
scavenging
gas
completed
fuel ratio
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CN114251180A (en
Inventor
李刚
张曲光
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Chongqing Cummins Engine Co Ltd
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Chongqing Cummins Engine Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/025—Failure diagnosis or prevention; Safety measures; Testing
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a method, a device, equipment and a storage medium for starting control of a gas engine, which comprise the following steps: before the engine is started, judging whether scavenging is completed in the engine; if not, scavenging the interior of the engine; if yes, the engine is started. When the scavenging is not completed in the engine before the engine is started, the scavenging is required to be performed in the engine, and the engine can be started after the scavenging is completed. That is, before the engine is started, a function of scavenging state diagnosis is added to ensure that scavenging can be completed before the engine is started each time; in other words, before the engine is started, the scavenging function is added, so that the gas is prevented from staying and gathering in the engine, the risk of backfire explosion of the engine is reduced, and the safe combustion is ensured.

Description

Method, device, equipment and storage medium for gas engine starting control
Technical Field
The present invention relates to the field of engine start control, and more particularly, to a method of gas engine start control, a device for gas engine start control, and a computer-readable storage medium.
Background
In the prior art, for a gas engine, accumulated gas is easy to stay in the engine, so that tempering explosion of the engine is easy to cause, and potential safety hazards exist.
Therefore, how to reduce the risk of backfire explosion of the engine and ensure safe combustion is a problem to be solved by the person skilled in the art.
Disclosure of Invention
Accordingly, the present invention is directed to a method for controlling the start of a gas engine, which can reduce the risk of backfire explosion of the engine and ensure safe combustion.
It is another object of the present invention to provide a gas engine start control apparatus, a gas engine start control device, and a computer readable storage medium to reduce the risk of backfire explosion of an engine, ensuring safe combustion.
In order to achieve the above object, the present invention provides the following technical solutions:
A method of gas engine start control, comprising:
Before an engine is started, judging whether scavenging is completed in the engine;
if not, scavenging the interior of the engine;
if yes, starting the engine.
Preferably, the determining whether scavenging is completed in the engine includes:
Judging whether the engine finishes scavenging in the last stopping process before the current starting;
if yes, determining that scavenging is completed in the engine;
If not, determining that scavenging is not completed in the engine.
Preferably, after said determining that scavenging is completed in said engine, further comprising:
Judging whether the time interval from the last stop to the current start of the engine exceeds a preset threshold value or not;
if yes, a step of scavenging the interior of the engine is performed.
Preferably, said scavenging the interior of the engine includes:
And carrying out cycle scavenging on the interior of the engine for n times, wherein n is a positive integer.
Preferably, the performing the cycle scavenging on the interior of the engine n times includes:
at least n min scavenging cycles are performed on the interior of the engine, and n min is:
Wherein k is a coefficient greater than 1; va is the total volume of an air inlet and outlet system of the engine and a cylinder body of the engine, and D is the displacement of the engine.
Preferably, said starting said engine comprises:
During a start-up phase of the engine, the air-fuel ratio of the engine is controlled to vary back and forth as a linear function between a set minimum air-fuel ratio and a set maximum air-fuel ratio.
Preferably, said starting said engine comprises:
In a start-up stage of the engine, controlling the air-fuel ratio of the engine to linearly increase to a preset air-fuel ratio, wherein the preset air-fuel ratio is a set air-fuel ratio of the engine in a low idle stage.
An apparatus for gas engine start control, comprising:
the first judging module is used for judging whether scavenging is completed in the engine or not before the engine is started;
A first execution module for scavenging an interior of the engine when scavenging is not completed in the engine;
And the second execution module is used for starting the engine when scavenging is completed in the engine.
An apparatus for gas engine start control, comprising:
a memory for storing a computer program;
And a processor for implementing any one of the above methods for gas engine start control when executing the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any one of the methods of gas engine start control described above.
According to the method for controlling the starting of the gas engine, before the engine is started, if scavenging is not completed in the engine, scavenging is needed to be performed in the engine, and the engine can be started after scavenging is completed. That is, before the engine is started, a function of scavenging state diagnosis is added to ensure that scavenging can be completed before the engine is started each time; in other words, before the engine is started, the scavenging function is added, so that the gas is prevented from staying and gathering in the engine, the risk of backfire explosion of the engine is reduced, and the safe combustion is ensured.
The device for controlling the starting of the gas engine, the equipment for controlling the starting of the gas engine and the computer readable storage medium have the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings may be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of gas engine start control provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an engine with air-fuel ratio change during a start-up phase according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of an engine air-fuel ratio change during a start-up phase according to another embodiment of the present invention;
FIG. 4 is a block diagram of an apparatus for controlling the start of a gas engine according to an embodiment of the present invention;
fig. 5 is a block diagram of an apparatus for gas engine start control according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The core of the invention is to provide a method for controlling the starting of a gas engine, which can reduce the risk of backfire explosion of the engine and ensure safe combustion. Another core of the present invention is to provide a gas engine start control apparatus, a gas engine start control device, and a computer readable storage medium, so as to reduce the risk of backfire explosion of the engine and ensure safe combustion.
Referring to fig. 1, a flowchart of a method for controlling start of a gas engine according to an embodiment of the present invention is shown.
The invention provides a method for controlling the starting of a gas engine, which comprises the following steps:
s1: before the engine is started, whether scavenging is completed in the engine is judged.
S2: if not, the interior of the engine is scavenged.
S3: if yes, the engine is started.
That is, if scavenging is not completed in the engine before the engine is started, it is necessary to scavenge the interior of the engine, and the engine can be started after the scavenging is completed.
That is, before the engine is started, a function of scavenging state diagnosis is added to ensure that scavenging can be completed before the engine is started each time; in other words, before the engine is started, the scavenging function is added, so that the gas is prevented from staying and gathering in the engine, the risk of backfire explosion of the engine is reduced, and the safe combustion is ensured.
It should be noted that, in this embodiment, a specific implementation manner of determining whether scavenging is completed in the engine is not limited, and as a preferred aspect, determining whether scavenging is completed in the engine based on the above embodiment includes:
judging whether the engine finishes scavenging in the last stopping process before the current starting;
if yes, determining that scavenging is completed in the engine;
if not, determining that scavenging is not completed in the engine.
Note that, in this embodiment, "last stop" means: the last shutdown adjacent to the current start-up.
That is, the scavenging step may be completed during the stopping of the engine, and in this embodiment, by determining whether the scavenging of the engine is completed during the last stopping of the engine before the current start, it is determined whether the scavenging of the engine is required before the start of the engine, that is, if the scavenging of the engine is completed during the last stopping of the engine before the current start, the step of starting the engine is directly performed; if the engine does not complete scavenging during the last stop before the current start, the interior of the engine is scavenged before the engine is started.
Further, in order to avoid restarting the engine for too long after the last stop, the method further includes, after determining that scavenging is completed in the engine, on the basis of the above embodiment, further including:
Judging whether the time interval from the last stop to the current start of the engine exceeds a preset threshold value or not;
if so, a step of scavenging the interior of the engine is performed.
That is, in this embodiment, even if the engine has completed scavenging during the last stop before the current start, it is further determined whether the time interval between the last stop and the current start of the engine satisfies the requirement, and if the time interval between the last stop and the current start of the engine exceeds the preset threshold, the scavenging of the interior of the engine is still performed before the start of the engine.
It should be noted that, the specific value of the preset threshold is not limited in this embodiment, and a person skilled in the art may set the preset threshold according to actual needs.
In addition, the specific implementation process of scavenging the interior of the engine is not limited in the above embodiment, and as a preferable mode, scavenging the interior of the engine includes:
the interior of the engine is subjected to n-cycle scavenging, where n is a positive integer.
That is, the present embodiment allows the scavenging to be more thorough by circulating the scavenging inside the engine so as to completely sweep the fuel gas in the engine clean and avoid the fuel gas from staying and accumulating in the engine.
The specific number of times of the circulation scavenging and the duration of each scavenging are not particularly limited in this embodiment, and may be set by those skilled in the art according to actual demands. In one embodiment, the duration of each scavenging is the same.
To ensure more thorough scavenging, on the basis of the above embodiment, the interior of the engine is subjected to n-cycle scavenging, including:
the engine interior is scavenged at least n min times, n min is:
Wherein k is a coefficient greater than 1; va is the total volume of an air inlet and outlet system of the engine and a cylinder body of the engine, and D is the displacement of the engine.
It will be appreciated that, in theory, the number of scavenging times isIn this case, the fuel gas in the engine can be purged, however, considering the condition that the scavenging is not clean every time, the embodiment is that/>And multiplying the coefficient of the scavenging ratio by a coefficient greater than 1 as the minimum cycle number of the scavenging.
It should be noted that, the specific value of k is not limited in this embodiment, and a person skilled in the art may set the value according to actual needs, and in one embodiment, k=2, that is,
In addition, considering that the gas source may be gas with low quality and unstable gas source, such as biogas, landfill gas, etc., in order to ensure that the engine can successfully ignite and burn under the condition of the gas source, as shown in fig. 2, starting the engine on the basis of the above embodiment includes:
During the start-up phase of the engine, the air-fuel ratio of the engine is controlled to vary back and forth as a function of a time between a set minimum air-fuel ratio and a set maximum air-fuel ratio. It will be appreciated that the air-fuel ratio varies back and forth between the set minimum air-fuel ratio and the set maximum air-fuel ratio, helping to ensure that the engine finds the optimum air-fuel ratio at start-up for successful ignition combustion.
In the present embodiment, specific values of the set minimum air-fuel ratio and maximum air-fuel ratio are not limited, and may be set by those skilled in the art according to actual requirements.
In addition, when the gas source is a stable gas source such as pipeline natural gas, as shown in fig. 3, in order to shorten the starting time, the engine is started on the basis of the above embodiment, including:
In the start-up stage of the engine, the air-fuel ratio of the engine is controlled to linearly increase to a preset air-fuel ratio, which is the set air-fuel ratio of the engine in the low idle stage.
In this embodiment, the starting value of the air-fuel ratio is the initial set value, that is, the engine is started, and the air-fuel ratio is controlled to linearly increase from the initial set value to the preset air-fuel ratio, so that the starting time can be shortened, and the smoothness of starting can be improved.
In fig. 2 and 3, the excess air ratio is the equivalent air-fuel ratio. That is, the excess air ratio is proportional to the air-fuel ratio.
Corresponding to the above method embodiment of gas engine start control, the embodiment of the present invention further provides a device for gas engine start control, where the device for gas engine start control described below and the method for gas engine start control described above may be referred to correspondingly with each other.
Referring to fig. 4, a structural frame of a device for controlling start of a gas engine according to an embodiment of the present invention is shown. The gas engine start control device includes:
a first judging module 11 for judging whether scavenging is completed in the engine before the engine is started;
a first execution module 12 for scavenging the interior of the engine when scavenging is not completed in the engine;
the second execution module 13 is used for starting the engine when scavenging is completed in the engine.
The device for controlling the starting of the gas engine has the beneficial effects of the method for controlling the starting of the gas engine.
On the basis of the above embodiment, the first judgment module 11 includes:
The judging unit is used for judging whether the engine finishes scavenging in the last stopping process before the current starting;
A first determining unit configured to determine that scavenging is completed in the engine when scavenging is completed in a last stop process before current starting of the engine;
and a second determining unit for determining that scavenging is not completed in the engine when scavenging is not completed in the last stop process before the current start-up of the engine.
On the basis of the above embodiment, the gas engine start control apparatus further includes:
the second judging module is used for judging whether the time interval from the last stop to the current start of the engine exceeds a preset threshold value or not;
And the third execution module is used for scavenging the interior of the engine when the time interval from the last stop to the current start of the engine exceeds a preset threshold value.
On the basis of the above embodiment, the first execution module 12 includes:
and the fourth execution module is used for circularly scavenging the interior of the engine for n times, wherein n is a positive integer.
On the basis of the above embodiment, the fourth execution module includes:
A fifth execution module, configured to perform scavenging on the interior of the engine at least n min times, where n min is:
Wherein k is a coefficient greater than 1; va is the total volume of an air inlet and outlet system of the engine and a cylinder body of the engine, and D is the displacement of the engine.
On the basis of the above embodiment, the second execution module 13 includes:
And a sixth execution module for controlling the air-fuel ratio of the engine to change back and forth as a function of a time between a set minimum air-fuel ratio and a set maximum air-fuel ratio during a start-up phase of the engine.
On the basis of the above embodiment, the second execution module 13 includes:
and the seventh execution module is used for controlling the air-fuel ratio of the engine to linearly increase to a preset air-fuel ratio in the starting stage of the engine, wherein the preset air-fuel ratio is the set air-fuel ratio of the engine in the low idle stage.
Referring to fig. 5, a block diagram of an apparatus for controlling start of a gas engine according to the present invention includes a memory 21 and a processor 22, where the memory 21 is used to store a computer program; the processor 22 is configured to execute the steps of the method for implementing the gas engine start control disclosed in any one of the embodiments described above when executing a computer program.
For the description of the apparatus for controlling the start of the gas engine provided by the present invention, refer to the above embodiment of the method for controlling the start of the gas engine, and the description of the present invention is omitted herein.
Corresponding to the above method embodiments of gas engine start control, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, can implement the steps of the method of gas engine start control disclosed in any one of the above embodiments.
The computer readable storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
For the description of the computer readable storage medium provided by the present invention, please refer to the above method embodiment of gas engine start control, and the description of the present invention is omitted herein.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
The method, the device, the equipment and the storage medium for controlling the starting of the gas engine provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (9)

1. A method of gas engine start control, comprising:
Before an engine is started, judging whether scavenging is completed in the engine;
if not, scavenging the interior of the engine;
if yes, starting the engine;
the starting of the engine comprises:
For gas with low fuel gas quality and unstable gas source, the air-fuel ratio of the engine is controlled to change back and forth between a set minimum air-fuel ratio and a set maximum air-fuel ratio according to a primary function in the starting stage of the engine.
2. The method for gas engine start control according to claim 1, wherein said determining whether scavenging is completed in said engine comprises:
Judging whether the engine finishes scavenging in the last stopping process before the current starting;
if yes, determining that scavenging is completed in the engine;
If not, determining that scavenging is not completed in the engine.
3. The method of gas engine start control according to claim 2, characterized by further comprising, after said determining that scavenging is completed in said engine:
Judging whether the time interval from the last stop to the current start of the engine exceeds a preset threshold value or not;
if yes, a step of scavenging the interior of the engine is performed.
4. The method of gas engine start control according to claim 1, wherein said scavenging the interior of the engine comprises:
And carrying out cycle scavenging on the interior of the engine for n times, wherein n is a positive integer.
5. The method for gas engine start control according to claim 4, wherein said performing the cycle scavenging of the interior of the engine n times includes:
at least n min scavenging cycles are performed on the interior of the engine, and n min is:
Wherein k is a coefficient greater than 1; va is the total volume of an air inlet and outlet system of the engine and a cylinder body of the engine, and D is the displacement of the engine.
6. The method for gas engine start control according to any one of claims 1 to 5, characterized in that said starting said engine includes:
In a start-up stage of the engine, controlling the air-fuel ratio of the engine to linearly increase to a preset air-fuel ratio, wherein the preset air-fuel ratio is a set air-fuel ratio of the engine in a low idle stage.
7. An apparatus for controlling start-up of a gas engine, comprising:
the first judging module is used for judging whether scavenging is completed in the engine or not before the engine is started;
A first execution module for scavenging an interior of the engine when scavenging is not completed in the engine;
A second execution module for starting the engine when scavenging is completed in the engine;
The second execution module includes:
and a sixth execution module, for the gas with low fuel gas quality and unstable gas source, is used for controlling the air-fuel ratio of the engine to change back and forth between the set minimum air-fuel ratio and the set maximum air-fuel ratio according to a primary function in the starting stage of the engine.
8. An apparatus for gas engine start control, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of gas engine start control according to any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of gas engine start control as claimed in any one of claims 1 to 6.
CN202111583962.0A 2021-12-22 2021-12-22 Method, device, equipment and storage medium for gas engine starting control Active CN114251180B (en)

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