CN113217201A - Natural gas engine supercharging method, natural gas engine supercharging system and vehicle - Google Patents
Natural gas engine supercharging method, natural gas engine supercharging system and vehicle Download PDFInfo
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- CN113217201A CN113217201A CN202110426514.3A CN202110426514A CN113217201A CN 113217201 A CN113217201 A CN 113217201A CN 202110426514 A CN202110426514 A CN 202110426514A CN 113217201 A CN113217201 A CN 113217201A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 239000003345 natural gas Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 133
- 230000004044 response Effects 0.000 abstract description 7
- 239000002912 waste gas Substances 0.000 description 14
- 230000033228 biological regulation Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- F02D23/00—Controlling engines characterised by their being supercharged
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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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
- F02B37/186—Arrangements of actuators or linkage for bypass valves
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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
- Y02T10/12—Improving ICE efficiencies
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a natural gas engine supercharging method, a natural gas engine supercharging system and a vehicle, wherein the natural gas engine supercharging method comprises the following steps: s1: acquiring the working state of the supercharger; s2: judging whether the supercharger meets a first preset condition or not according to the working state of the supercharger; s3: adjusting the set parameters of the exhaust gas control valve according to the condition that the supercharger does not meet the first preset condition; s4: acquiring current parameters of an exhaust gas control valve; s5: judging whether the exhaust gas control valve meets a second preset condition or not according to the set parameters and the current parameters; s6: and adjusting the exhaust gas control valve according to the fact that the exhaust gas control valve does not meet the second preset condition. By using the natural gas engine supercharging method, the opening degree of the supercharger bypass valve can be accurately controlled under all working conditions of natural gas engine operation, the control precision of supercharging pressure is improved, and quick response of the supercharger is realized.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a natural gas engine supercharging method, a natural gas engine supercharging system and a vehicle.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
When the natural gas engine supercharger is controlled at the present stage, the target value and the actual value of the supercharging pressure of the supercharger are compared, if the comparison result of the target value and the actual value is consistent, the current state is kept, and if the comparison result of the target value and the actual value is inconsistent, the push rod mechanism of the bypass valve of the supercharger is adjusted through the exhaust gas control valve, so that the supercharging pressure meets the target value.
In the prior art, the whole process is single-stage closed-loop control, the opening of a bypass valve of a supercharger cannot be accurately controlled, and the response speed of the supercharger is low.
Disclosure of Invention
The object of the present invention is to at least solve the problem of how to increase the response speed of a supercharger. The purpose is realized by the following technical scheme:
the first aspect of the invention provides a method for supercharging a natural gas engine, which comprises the following steps:
acquiring the working state of the supercharger;
judging whether the supercharger meets a first preset condition or not according to the working state of the supercharger;
adjusting the set parameters of the exhaust gas control valve according to the condition that the supercharger does not meet the first preset condition;
acquiring current parameters of an exhaust gas control valve;
judging whether the exhaust gas control valve meets a second preset condition or not according to the set parameters and the current parameters;
and adjusting the exhaust gas control valve according to the fact that the exhaust gas control valve does not meet the second preset condition.
According to the natural gas engine supercharging method, the acquired working state of the supercharger is compared with the first preset condition, when the acquired working state of the supercharger is consistent with the first preset condition, the current working condition of the supercharger meets the requirement of the natural gas engine, and when the acquired working state of the supercharger is inconsistent with the first preset condition, the current working condition of the supercharger cannot meet the requirement of the natural gas engine, and the bypass valve of the supercharger needs to be correspondingly adjusted by adjusting the exhaust gas control valve. When the obtained working state of the supercharger is inconsistent with the first preset condition, the set parameters of the exhaust gas control valve are adjusted to meet the requirement adaptation of the natural gas engine, then the current parameters of the exhaust gas control valve are compared with the set parameters, when the set parameters of the exhaust gas control valve are consistent with the current parameters of the exhaust gas control valve, the current state of the exhaust gas control valve meets the regulation requirement of the supercharger, the current state of the exhaust gas control valve is kept, and when the set parameters of the exhaust gas control valve are inconsistent with the current parameters of the exhaust gas control valve, the current state of the exhaust gas control valve cannot meet the regulation requirement of the supercharger, and the exhaust gas control valve is regulated to meet the regulation requirement of the supercharger.
By using the natural gas engine supercharging method, the opening degree of the supercharger bypass valve can be accurately controlled under all working conditions of natural gas engine operation, the control precision of supercharging pressure is improved, and quick response of the supercharger is realized.
In addition, the supercharging method of the natural gas engine according to the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, the step of obtaining the operating state of the supercharger comprises:
acquiring a set value of the boost pressure of the supercharger;
and acquiring the current pressure value of the supercharger.
In some embodiments of the present invention, in the step of determining whether the supercharger meets a first preset condition according to the operating state of the supercharger, the first preset condition is that the supercharging pressure of the supercharger is equal to the current pressure of the supercharger.
In some embodiments of the invention, in the step of adjusting the setting parameter of the exhaust gas control valve according to the supercharger not meeting the first preset condition, the control parameter of the exhaust gas control valve is a preset pressure of the outlet of the exhaust gas control valve.
In some embodiments of the present invention, the adjusting of the setting parameter of the exhaust gas control valve in accordance with the supercharger failing to meet the first preset condition includes:
increasing the preset pressure of the outlet of the exhaust gas control valve according to the condition that the supercharging pressure of the supercharger is greater than the current pressure of the supercharger;
and reducing the preset pressure of the outlet of the exhaust gas control valve according to the condition that the supercharging pressure of the supercharger is less than the current pressure of the supercharger.
In some embodiments of the invention, in the step of obtaining the current parameter of the exhaust gas control valve, the current parameter of the exhaust gas control valve is a current pressure of the outlet of the exhaust gas control valve.
In some embodiments of the present invention, in the step of judging whether the exhaust gas control valve meets the second preset condition based on the set parameter and the current parameter, the second preset condition is that the preset pressure of the outlet of the exhaust gas control valve is equal to the current pressure of the outlet of the exhaust gas control valve.
In some embodiments of the invention, the adjusting the exhaust gas control valve according to the exhaust gas control valve not meeting the second preset condition includes:
comparing a preset pressure of an outlet of the exhaust gas control valve with a current pressure of the outlet of the exhaust gas control valve;
increasing the duty cycle output of the exhaust gas control valve according to the preset pressure of the outlet of the exhaust gas control valve being greater than the current pressure of the outlet of the exhaust gas control valve;
and reducing the duty ratio output of the exhaust gas control valve according to the preset pressure of the outlet of the exhaust gas control valve being less than the current pressure of the outlet of the exhaust gas control valve.
A second aspect of the present invention provides a supercharging system of a natural gas engine, including a control device and a computer-readable storage medium, the computer-readable storage medium having stored therein control instructions, the control device implementing a supercharging method of the natural gas engine according to the above by executing the control instructions, the control device including:
the acquisition module is used for acquiring the working state of the supercharger and/or acquiring the current parameters of the exhaust gas control valve;
the comparison module is used for comparing the working state of the supercharger with a first preset condition, and/or comparing a set parameter with a current parameter and comparing a comparison result of the set parameter and the current parameter with a second preset condition;
a control module for adjusting a setting parameter of the exhaust gas control valve and/or for adjusting the exhaust gas control valve.
A third aspect of the invention proposes a vehicle comprising a natural gas engine and a supercharging system according to the natural gas engine as described above.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a flow chart of a method of supercharging a natural gas engine according to an embodiment of the present invention;
fig. 2 schematically shows a schematic configuration diagram of a supercharging system of a natural gas engine according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, according to an embodiment of the present invention, there is provided a method of supercharging a natural gas engine, the method comprising the steps of:
s1: and acquiring the working state of the supercharger.
In the working process of the natural gas engine, if the torque required by the actual working condition changes, the output torque of the natural gas engine needs to be adjusted so that the natural gas engine can meet the actual use requirement. When a supercharging system of a natural gas engine is controlled, the state of a supercharger needs to be acquired so as to ensure that the supercharger can effectively meet the air inlet requirement of the natural gas engine, specifically, the opening degree of a pedal is acquired, the torque required by the natural gas engine is calculated according to the opening degree of the pedal, the air quantity required by a natural gas transmitter is calculated according to the required torque, the supercharging pressure set value (target pressure) of the supercharger is determined according to the required air quantity, and the current pressure value of the supercharger is acquired at the same time, so that the working state of the supercharger is acquired, and the supercharging pressure set value of the supercharger and the current pressure value of the supercharger are acquired, so that whether the current state of the supercharger meets the use requirement of an actual working condition or not can be accurately acquired, and the control precision of the supercharging system of the natural gas engine is further ensured.
S2: and judging whether the supercharger meets a first preset condition or not according to the working state of the supercharger.
Specifically, when the working state of the supercharger is judged, a first preset condition is used as a standard for judgment, wherein the first preset condition uses a supercharging pressure set value of the supercharger and a current pressure value of the supercharger as parameters, the first preset condition is that the supercharging pressure set value of the supercharger is equal to the current pressure of the supercharger, if the supercharging pressure set value of the supercharger is equal to the current pressure of the supercharger, the working state of the supercharger accords with the first preset condition, and it is sufficient to maintain the current state of the supercharger, and if the supercharging pressure set value of the supercharger is not equal to the current pressure of the supercharger, the working state of the supercharger does not accord with the first preset condition, and the supercharger needs to be adjusted. By comparing the set value of the boost pressure of the supercharger with the current pressure of the supercharger and taking the set value of the boost pressure of the supercharger and the current pressure of the supercharger equal as a first preset condition, the current state of the supercharger can be judged quickly, the steps of logical operation are reduced, and the response speed is improved.
S3: and adjusting the set parameters of the exhaust gas control valve according to the condition that the supercharger does not meet the first preset condition.
When the supercharging pressure set value of the supercharger is not equal to the current pressure of the supercharger, the working state of the supercharger does not accord with a first preset condition at the moment, and the supercharger needs to be adjusted in response in order to meet the air intake requirement of the natural gas engine. Specifically, the bypass valve of the supercharger is in transmission connection with the exhaust gas control valve, the bypass valve of the supercharger is adjusted through controlling the exhaust gas control valve so as to adjust the air inflow of the supercharger, wherein, the control parameter of the waste gas control valve is the preset pressure of the outlet of the waste gas control valve, when the supercharging pressure of the supercharger is larger than the current pressure of the supercharger, at this time, the amount of air input of the supercharger needs to be increased, the preset pressure of the outlet of the exhaust gas control valve needs to be increased, so as to utilize the waste gas control valve to increase the opening degree of the bypass valve of the supercharger to meet the air inlet requirement of the supercharger, and conversely, when the supercharging pressure of the supercharger is smaller than the current pressure of the supercharger, the air input of the supercharger needs to be increased, the preset pressure of the outlet of the exhaust gas control valve needs to be increased, to reduce the opening of the bypass valve of the large supercharger by means of the exhaust gas control valve to meet the intake air demand of the supercharger.
S4: current parameters of the exhaust gas control valve are acquired.
Specifically, the outlet of the exhaust gas control valve is communicated with a push rod mechanism of a bypass valve of the supercharger, the bypass valve is pneumatically controlled by the exhaust gas control valve, and the size and diameter of the outlet pressure of the exhaust gas control valve influence the control of the bypass valve, so that the current pressure of the outlet of the exhaust gas control valve is used as a parameter for controlling the exhaust gas control valve, and the control precision of the supercharger is ensured.
S5: and judging whether the exhaust gas control valve meets a second preset condition or not according to the set parameters and the current parameters.
Specifically, when a set value of the boost pressure of the supercharger is not equal to the current pressure of the supercharger, a set parameter of the exhaust gas control valve is adjusted according to a difference between a set value of the boost pressure of the supercharger and the current pressure of the supercharger, wherein the set parameter is a preset pressure of an outlet of the exhaust gas control valve, the current parameter of the exhaust gas control valve is the current pressure of the outlet of the exhaust gas control valve, and a second preset condition is that the preset pressure of the outlet of the exhaust gas control valve is equal to the current pressure of the outlet of the exhaust gas control valve.
S6: and adjusting the exhaust gas control valve according to the fact that the exhaust gas control valve does not meet the second preset condition.
The method comprises the steps of analyzing and judging the current state of the waste gas control valve by utilizing the preset pressure of the outlet of the waste gas control valve, the current pressure of the outlet of the waste gas control valve and a second preset condition, if the preset pressure of the outlet of the waste gas control valve is equal to the current pressure of the outlet of the waste gas control valve, the working state of the waste gas control valve accords with the second preset condition, the current state of the waste gas control valve can be kept, if the preset pressure of the outlet of the waste gas control valve is not equal to the current pressure of the outlet of the waste gas control valve, the working state of the waste gas control valve does not accord with the second preset condition, and the waste gas control valve needs to be adjusted. Specifically, when the preset pressure of the outlet of the exhaust gas control valve is greater than the current pressure of the outlet of the exhaust gas control valve, the duty ratio output of the exhaust gas control valve is increased, so that the exhaust gas control valve can quickly achieve the purpose of adjusting the bypass valve, and the supercharger can meet the use requirement of the natural gas engine; when the preset pressure of the outlet of the exhaust gas control valve is smaller than the current pressure of the outlet of the exhaust gas control valve, the duty ratio output of the exhaust gas control valve is reduced, so that the exhaust gas control valve can quickly achieve the purpose of adjusting the bypass valve, and the supercharger can meet the use requirement of the natural gas engine.
According to the natural gas engine supercharging method, the acquired working state of the supercharger is compared with the first preset condition, when the acquired working state of the supercharger is consistent with the first preset condition, the current working condition of the supercharger meets the requirement of the natural gas engine, and when the acquired working state of the supercharger is inconsistent with the first preset condition, the current working condition of the supercharger cannot meet the requirement of the natural gas engine, and the bypass valve of the supercharger needs to be correspondingly adjusted by adjusting the exhaust gas control valve. When the obtained working state of the supercharger is inconsistent with the first preset condition, the set parameters of the exhaust gas control valve are adjusted to meet the requirement adaptation of the natural gas engine, then the current parameters of the exhaust gas control valve are compared with the set parameters, when the set parameters of the exhaust gas control valve are consistent with the current parameters of the exhaust gas control valve, the current state of the exhaust gas control valve meets the regulation requirement of the supercharger, the current state of the exhaust gas control valve is kept, and when the set parameters of the exhaust gas control valve are inconsistent with the current parameters of the exhaust gas control valve, the current state of the exhaust gas control valve cannot meet the regulation requirement of the supercharger, and the exhaust gas control valve is regulated to meet the regulation requirement of the supercharger.
Specifically, the natural gas engine operates, the required air amount is calculated according to the pedal request torque, so that the currently required boost pressure set value is determined, whether the boost pressure set value is equal to the current pressure or not is judged, if not, the preset pressure of the air outlet of the exhaust gas control valve is increased or reduced, and the first-stage closed loop is realized. And judging whether the preset pressure of the outlet of the exhaust gas control valve is equal to the current pressure of the outlet of the exhaust gas control valve, if not, increasing or reducing the duty ratio output of the exhaust gas control valve, and realizing a second-stage closed loop.
Compared with the prior art, the natural gas engine supercharging method provided by the invention can be used for accurately controlling the opening of the supercharger bypass valve under all working conditions of natural gas engine operation, so that the supercharging pressure is accurately controlled. The double closed-loop control strategy can realize quick response of the supercharger, and can distinguish and diagnose faults of components of the supercharging system according to two-stage closed-loop feedback results.
As shown in fig. 2, the present invention further provides a natural gas engine supercharging system, which includes a control device and a computer-readable storage medium, wherein the computer-readable storage medium stores control instructions, and the control device implements the natural gas engine supercharging method according to the above by executing the control instructions, and the control device includes:
and the acquisition module is used for acquiring the working state of the supercharger and/or acquiring the current parameters of the exhaust gas control valve. Specifically, the acquisition module is used for detecting the supercharger and the exhaust gas control valve respectively, wherein the acquisition module comprises a first sensor, a second sensor and a third sensor, the first sensor is a displacement sensor and is used for detecting the opening degree of a pedal of the natural gas engine, the second sensor is a pressure sensor and is used for detecting the current pressure of the supercharger, and the third sensor is a pressure sensor and is used for detecting the current pressure of an outlet of the exhaust gas control valve.
And the comparison module is used for comparing the working state of the supercharger with a first preset condition, and/or comparing the set parameter with the current parameter and comparing the comparison result of the set parameter and the current parameter with a second preset condition. Specifically, the comparison module compares the supercharging pressure of the supercharger with the current pressure of the supercharger, compares the result obtained by the comparison with a first preset condition (the supercharging pressure of the supercharger is equal to the current pressure of the supercharger), and adjusts the preset pressure of the outlet of the exhaust gas control valve according to the result of the comparison; in addition, the comparison module compares the preset pressure of the outlet of the exhaust gas control valve with the current pressure of the outlet of the exhaust gas control valve, compares the result of the comparison with a second preset condition (the preset pressure of the outlet of the exhaust gas control valve is equal to the current pressure of the outlet of the exhaust gas control valve), and increases or decreases the duty ratio output of the exhaust gas control valve according to the result of the comparison.
A control module for adjusting a setting parameter of the exhaust gas control valve and/or for adjusting the exhaust gas control valve.
Specifically, the control module is used for adjusting parameters and sending control instructions to each module and component to ensure smooth control.
In an embodiment of the present invention, the control module is a processor, where the processor may be an integrated circuit chip and has a signal processing capability. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory.
The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), SLDRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The invention also provides a vehicle which is characterized by comprising the natural gas engine and the supercharging system, wherein the supercharging system is the natural gas engine supercharging system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for supercharging a natural gas engine, characterized by comprising the steps of:
acquiring the working state of the supercharger;
judging whether the supercharger meets a first preset condition or not according to the working state of the supercharger;
adjusting the set parameters of the exhaust gas control valve according to the condition that the supercharger does not meet the first preset condition;
acquiring current parameters of an exhaust gas control valve;
judging whether the exhaust gas control valve meets a second preset condition or not according to the set parameters and the current parameters;
and adjusting the exhaust gas control valve according to the fact that the exhaust gas control valve does not meet the second preset condition.
2. The natural gas engine supercharging method according to claim 1, wherein the step of obtaining the operating state of the supercharger comprises:
acquiring a set value of the boost pressure of the supercharger;
and acquiring the current pressure value of the supercharger.
3. The natural gas engine supercharging method according to claim 2, wherein in the step of determining whether the supercharger meets a first preset condition based on the operating state of the supercharger, the first preset condition is that the supercharging pressure of the supercharger is equal to the current pressure of the supercharger.
4. The natural gas engine supercharging method according to claim 3, wherein in the step of adjusting the setting parameter of the exhaust gas control valve in accordance with the non-compliance of the supercharger with the first preset condition, the control parameter of the exhaust gas control valve is a preset pressure of the outlet of the exhaust gas control valve.
5. The natural gas engine supercharging method according to claim 4, wherein the step of adjusting the setting parameter of the exhaust gas control valve in accordance with the failure of the supercharger to meet the first preset condition includes:
increasing the preset pressure of the outlet of the exhaust gas control valve according to the condition that the supercharging pressure of the supercharger is greater than the current pressure of the supercharger;
and reducing the preset pressure of the outlet of the exhaust gas control valve according to the condition that the supercharging pressure of the supercharger is less than the current pressure of the supercharger.
6. The method for supercharging a natural gas engine according to claim 4, characterized in that, in the step of acquiring the current parameter of the exhaust gas control valve, the current parameter of the exhaust gas control valve is the current pressure of the outlet of the exhaust gas control valve.
7. The method for supercharging a natural gas engine according to claim 6, characterized in that, in the step of judging whether the exhaust gas control valve meets a second preset condition based on the set parameter and the current parameter, the second preset condition is that a preset pressure of the outlet of the exhaust gas control valve is equal to a current pressure of the outlet of the exhaust gas control valve.
8. The method for supercharging a natural gas engine according to claim 7, wherein in the step of adjusting the exhaust gas control valve in accordance with the exhaust gas control valve not meeting the second preset condition, the step of adjusting the exhaust gas control valve includes:
comparing a preset pressure of an outlet of the exhaust gas control valve with a current pressure of the outlet of the exhaust gas control valve;
increasing the duty cycle output of the exhaust gas control valve according to the preset pressure of the outlet of the exhaust gas control valve being greater than the current pressure of the outlet of the exhaust gas control valve;
and reducing the duty ratio output of the exhaust gas control valve according to the preset pressure of the outlet of the exhaust gas control valve being less than the current pressure of the outlet of the exhaust gas control valve.
9. A supercharging system for a natural gas engine, the supercharging system for a natural gas engine comprising a control apparatus and a computer-readable storage medium, the computer-readable storage medium having stored therein control instructions, the control apparatus implementing a method of supercharging a natural gas engine according to any one of claims 1 to 8 by executing the control instructions, characterized in that the control apparatus comprises:
the acquisition module is used for acquiring the working state of the supercharger and/or acquiring the current parameters of the exhaust gas control valve;
the comparison module is used for comparing the working state of the supercharger with a first preset condition, and/or comparing a set parameter with a current parameter and comparing a comparison result of the set parameter and the current parameter with a second preset condition;
a control module for adjusting a setting parameter of the exhaust gas control valve and/or for adjusting the exhaust gas control valve.
10. A vehicle comprising a natural gas engine and a supercharging system, the supercharging system being a natural gas engine supercharging system according to claim 9.
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