CN112392613A - Starting method and starting system of gas engine - Google Patents
Starting method and starting system of gas engine Download PDFInfo
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- CN112392613A CN112392613A CN202011295703.3A CN202011295703A CN112392613A CN 112392613 A CN112392613 A CN 112392613A CN 202011295703 A CN202011295703 A CN 202011295703A CN 112392613 A CN112392613 A CN 112392613A
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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
- F02D41/02—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
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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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
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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
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
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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
- Y02T10/40—Engine management systems
Abstract
The method comprises starting a gas engine according to a crankshaft signal when a camshaft signal of the gas engine is lost, acquiring an actuator electrical interference signal of a currently started cylinder chamber of the gas engine and a detonation signal waveform of the currently started cylinder chamber in the starting process, acquiring an actual ignition signal of the currently started cylinder chamber of the gas engine according to the actuator electrical interference signal, judging whether the currently started cylinder chamber of the gas engine is correctly started according to the detonation signal waveform and the actual ignition signal, and adjusting the crankshaft signal of the gas engine when the currently started cylinder chamber of the gas engine is not correctly started so as to enable the currently started cylinder chamber to be normally started in a next starting period or a next starting cylinder chamber of the gas engine, the problem of unable normal start when the camshaft signal of gas engine loses is solved.
Description
Technical Field
The present disclosure relates to vehicle engineering technologies, and more particularly, to a starting method and a starting system for a gas engine.
Background
During ignition of an electronically controlled engine system, it is often necessary to know the operating conditions of each cylinder chamber to determine the injection or ignition timing.
During the starting process of the traditional engine, a camshaft sensor is needed to acquire a camshaft signal of a cylinder chamber so as to judge the working state of the cylinder chamber, and therefore the camshaft sensor is also called as a cylinder identification sensor.
However, in the application process, when the camshaft sensor fails, the engine cannot be started normally.
Disclosure of Invention
In order to solve the technical problem, the application provides a starting method and a starting system of a gas engine, so as to solve the problem that the gas engine cannot be normally started when a signal of a camshaft of the engine is lost.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
a gas engine starting method for controlling gas engine starting when a camshaft signal of a gas engine is lost, the gas engine starting method comprising:
when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
Optionally, the determining whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal includes:
and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, and if not, judging that the current starting cylinder chamber of the gas engine is abnormally started.
Optionally, the value range of the preset angle threshold is 0-40 °.
Optionally, the adjusting the crank signal of the gas engine comprises:
offsetting an angle of a crankshaft signal of the gas engine by 360 °.
Optionally, after adjusting the crank signal angle of the gas engine, the method further includes:
and taking the adjusted crankshaft signal of the gas engine as the crankshaft signal of the next starting period of the current starting cylinder chamber of the gas engine or the crankshaft signal of the current starting period of the next starting cylinder chamber of the gas engine.
A gas engine starting system for controlling gas engine starting when a camshaft signal of a gas engine is lost, the gas engine starting system comprising:
the signal acquisition module is used for acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber when the gas engine is started according to a crankshaft signal;
the ignition signal module is used for acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and the signal adjusting module is used for judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
Optionally, the process of determining, by the signal adjustment module, whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal specifically includes:
and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, and if not, judging that the current starting cylinder chamber of the gas engine is abnormally started.
Optionally, the value range of the preset angle threshold is 0-40 °.
Optionally, the process of adjusting the crankshaft signal of the gas engine by the signal adjusting module specifically includes:
offsetting an angle of a crankshaft signal of the gas engine by 360 °.
Optionally, the signal adjusting module is further configured to, after adjusting the crank signal angle of the gas engine, use the adjusted crank signal of the gas engine as a crank signal at a next starting period of a currently starting cylinder chamber of the gas engine or as a crank signal at a current starting period of a next starting cylinder chamber of the gas engine.
It can be seen from the foregoing technical solutions that the present application provides a starting method and a starting system for a gas engine, where the starting method for the gas engine starts the gas engine according to a crankshaft signal when a camshaft signal of the gas engine is lost, obtains an actuator electrical interference signal of a currently started cylinder chamber of the gas engine and a knock signal waveform of the currently started cylinder chamber during starting, then obtains an actual ignition signal of the currently started cylinder chamber of the gas engine according to the actuator electrical interference signal, finally determines whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal, and adjusts the crankshaft signal of the gas engine when the currently started cylinder chamber of the gas engine is not correctly started, the starting cylinder chamber can be normally started in the next starting period or the next starting cylinder chamber of the gas engine, and the problem that the gas engine cannot be normally started when a camshaft signal of the gas engine is lost is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating a method for starting a gas engine according to an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram illustrating a method for starting a gas engine according to another embodiment of the present application;
FIG. 3 is a schematic flow chart diagram illustrating a method for starting a gas engine according to yet another embodiment of the present application;
FIG. 4 is a schematic flow chart diagram illustrating a method for starting a gas engine according to yet another embodiment of the present application;
fig. 5 is a schematic structural diagram of a starting system of a gas engine according to an embodiment of the present application.
Detailed Description
As described in the background art, when a camshaft sensor of an engine fails, a camshaft signal cannot be obtained during the starting process of the engine, and the engine cannot be normally started.
In order to solve this problem, researchers have provided a piezoresistive cylinder pressure sensor in an engine, which can directly detect the pressure state in a cylinder of the engine, and the pressure state change in the cylinder has a certain correlation with the phase of a crankshaft. Based on the sensor, the cylinder judging function of the engine can be realized under the condition of no camshaft sensor or crankshaft sensor, the rotating speed of the engine can be calculated through the change of cylinder pressure through numbers, the operation of the engine under the condition of no camshaft is realized, and the reliability of the system is improved through a redundancy design.
The principle is as follows: when a certain cylinder of the engine is in a compression stroke, the volume of the cylinder is continuously reduced along with the operation of the piston from a bottom dead center to a top dead center, and the cylinder pressure can be increased along with the reduction according to an ideal gas state equation under the condition that the total gas quantity is basically unchanged; when the valve is in the exhaust stroke, the pressure in the cylinder is at a low level and does not change greatly, and when the valve is in the power stroke, the pressure changes rapidly and takes a curve of steep rising and falling. Based on the difference of the cylinder pressures, the cylinder judgment and the rotating speed calculation of the engine can be realized, so that reference signals can be provided for fuel injection and ignition control, and the function of 'limp home' is realized under the fault state of a crankshaft and a camshaft of the engine.
However, this solution requires an additional piezoresistive cylinder pressure sensor in addition to the camshaft sensor, and increases hardware, which may result in increased complexity and cost of the system.
In view of the above, an embodiment of the present application provides a starting method of a gas engine, for controlling the gas engine to start when a camshaft signal of the gas engine is lost, the starting method of the gas engine including:
when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
And correspondingly, a starting system of the gas engine, which is used for controlling the gas engine to start when a camshaft signal of the gas engine is lost, the starting system of the gas engine comprises:
the signal acquisition module is used for acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber when the gas engine is started according to a crankshaft signal;
the ignition signal module is used for acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and the signal adjusting module is used for judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
The gas engine starting method enables the gas engine to be started according to the crankshaft signal when the camshaft signal of the gas engine is lost, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber during starting, then obtaining an actual ignition signal of the current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator, finally judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the waveform of the knock signal and the actual ignition signal, and adjusting a crank signal of the gas engine when a currently starting cylinder chamber of the gas engine is not properly started, the starting cylinder chamber can be normally started in the next starting period or the next starting cylinder chamber of the gas engine, and the problem that the gas engine cannot be normally started when a camshaft signal of the gas engine is lost is solved.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The embodiment of the application provides a starting method of a gas engine, as shown in fig. 1, for controlling the gas engine to start when a camshaft signal of the gas engine is lost, and the starting method of the gas engine comprises the following steps:
s101: when the gas engine is started according to the crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber.
S102: and acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the actuator electrical interference signal.
S103: and judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
In step S101, the start of the gas engine by the crank signal may be a process of starting the gas engine as a whole from a stopped state, or may be a process of starting each cylinder chamber in each cycle while the gas engine is running.
In addition, in step S101, the process of acquiring the actuator electrical interference signal of the currently started cylinder chamber of the gas engine and the knock signal waveform of the currently started cylinder chamber may both be performed by a knock sensor provided in the gas engine. In some gas engines, where each cylinder chamber is equipped with a knock sensor, the signal may be obtained by the knock sensor of each cylinder chamber. In some gas engines, in order to save the number of knock sensors, two or more cylinder chambers may be equipped with one knock sensor, and in this case, one knock sensor obtains the actuator electrical interference signals of two or more cylinder chambers and the knock signal waveform of the currently started cylinder chamber, and the obtained signals may be in one-to-one correspondence with the respective cylinder chambers according to the starting sequence of the respective cylinder chambers of the gas engine and the obtaining sequence of the signals, for example, when the cylinder chamber 1 is started first, the actuator electrical interference signal and the knock signal waveform obtained first by the knock sensor correspond to the cylinder chamber 1, that is, the actuator electrical interference signal and the knock signal waveform of the cylinder chamber 1.
In step S102, after the actuator electrical interference signal of a certain cylinder chamber is acquired, the ignition signal can be determined according to the frequency, amplitude and time of the actuator electrical interference signal. And when the frequency of the electric interference signal of the actuator is 5-10 kHz, the amplitude is 0.25-0.4V, the duration is kept between 0.8ms and 0.9ms, and the voltage peak value of the knock sensor is kept between 0 degree and 40 degrees or between 320 degrees and 360 degrees of crank angle deviation, the interference of the ignition coil during operation is judged.
In another embodiment of the present application, as shown in fig. 2, a starting method of a gas engine includes:
s201: when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
s202: acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
s203: and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, otherwise, judging that the current starting cylinder chamber of the gas engine is abnormally started, and adjusting a crankshaft signal of the gas engine.
When only the crank signal is available, the ECU of the gas engine can calculate the current engine speed, and after the engine speed is calculated, the time ta required by the current starting cylinder chamber 1 rotation of the engine can be obtained according to the engine speed, the internal logic of the ECU is performed according to the time, the time T1 of the ignition signal, the generation time T2 of the knock signal waveform, and the time difference tb obtained from T2-T1 are recorded, the angle corresponding to tb is tb/ta × 360 °, and the angle corresponding to tb is the angle value at which the angle of the actual ignition signal is compared with the angle of the knock signal waveform, and when the judgment is made, tb/ta × 360 ° (i.e. the angle of the actual ignition signal is compared with the angle of the knock signal waveform) is compared with the preset angle threshold.
In the present embodiment, step S203 is executed to determine whether the currently activated cylinder chamber of the gas engine is correctly activated, specifically, based on the knock signal waveform and the actual ignition signal. The angle of the actual ignition signal may also be referred to as an ignition angle or an ignition advance angle, generally, when a certain cylinder chamber is ignited (started), the angle of the ignition signal of the cylinder chamber is generally earlier than the angle of the waveform of the knock signal, but the difference between the angles is not too large, and optionally, the value range of the preset angle threshold is 0-40 °.
In another embodiment of the present application, based on the above embodiment, as shown in fig. 3, the starting method of the gas engine includes:
s301: when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
s302: acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
s303: and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, otherwise, judging that the current starting cylinder chamber of the gas engine is abnormally started, and shifting the angle of a crankshaft signal of the gas engine by 360 degrees.
In this embodiment, step S303 provides a practical way to adjust the crank signal of the gas engine, because only the crank signal is used at the time of starting, and the rotational speed phase determined by the gas engine according to the crank signal is either correct or deviated by 360 °, so that when the starting is abnormal, the angle of the crank signal of the gas engine is shifted by 360 ° to ensure the successful next ignition.
In another embodiment of the present application, based on the above embodiment, as shown in fig. 4, the starting method of the gas engine includes:
s401: when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
s402: acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
s403: and judging whether the angle of the actual ignition signal is ahead of the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, if not, judging that the current starting cylinder chamber of the gas engine is abnormally started, deviating the angle of a crankshaft signal of the gas engine by 360 degrees, and using the adjusted crankshaft signal of the gas engine as the crankshaft signal of the current starting cylinder chamber of the gas engine in the next starting period or the crankshaft signal of the next starting cylinder chamber of the gas engine in the current starting period.
In this embodiment, after determining that the current starting cylinder chamber of the gas engine is abnormally started and adjusting the crank signal angle of the gas engine, the adjusted crank signal of the gas engine is used as the crank signal in the next starting period of the current starting cylinder chamber of the gas engine or as the crank signal in the current starting period of the next starting cylinder chamber of the gas engine to correct the quick determination phase for the starting process of the next starting cylinder chamber of the gas engine, so as to ensure that the next starting cylinder chamber of the starting engine can be normally started, or correct the quick determination phase for the starting process of the next starting period of the current starting cylinder chamber of the gas engine, so as to ensure that the next starting period of the current starting cylinder chamber of the gas engine can be normally started.
The following describes a starting system of a gas engine provided in an embodiment of the present application, and the following described starting system of a gas engine and the above described starting method of a gas engine may be referred to in correspondence with each other.
Accordingly, an embodiment of the present application provides a starting system of a gas engine, as shown in fig. 5, for controlling the gas engine to start when a camshaft signal of the gas engine is lost, the starting system of the gas engine including:
the signal acquisition module 100 is configured to acquire an actuator electrical interference signal of a currently started cylinder chamber of the gas engine and a knock signal waveform of the currently started cylinder chamber when the gas engine is started according to a crankshaft signal;
the ignition signal module 200 is used for acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the actuator electrical interference signal;
and the signal adjusting module 300 is configured to determine whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal, and if not, adjust a crankshaft signal of the gas engine.
In the signal obtaining module 100, the starting of the gas engine according to the crank signal may refer to a process of starting the whole gas engine from a stopped state, or may refer to a starting process of each cylinder chamber in each cycle during the operation of the gas engine.
In addition, in the signal obtaining module 100, the process of obtaining the actuator electrical interference signal of the currently started cylinder chamber of the gas engine and the knock signal waveform of the currently started cylinder chamber may be both performed by a knock sensor provided in the gas engine. In some gas engines, where each cylinder chamber is equipped with a knock sensor, the signal may be obtained by the knock sensor of each cylinder chamber. In some gas engines, in order to save the number of knock sensors, two or more cylinder chambers may be equipped with one knock sensor, and in this case, one knock sensor obtains the actuator electrical interference signals of two or more cylinder chambers and the knock signal waveform of the currently started cylinder chamber, and the obtained signals may be in one-to-one correspondence with the respective cylinder chambers according to the starting sequence of the respective cylinder chambers of the gas engine and the obtaining sequence of the signals, for example, when the cylinder chamber 1 is started first, the actuator electrical interference signal and the knock signal waveform obtained first by the knock sensor correspond to the cylinder chamber 1, that is, the actuator electrical interference signal and the knock signal waveform of the cylinder chamber 1.
In the ignition signal module 200, after the actuator electrical interference signal of a certain cylinder chamber is acquired, the ignition signal can be judged according to the frequency, the amplitude and the time of the actuator electrical interference signal. And when the frequency of the electric interference signal of the actuator is 5-10 kHz, the amplitude is 0.25-0.4V, the duration is kept between 0.8ms and 0.9ms, and the voltage peak value of the knock sensor is kept between 0 degree and 40 degrees or between 320 degrees and 360 degrees of crank angle deviation, the interference of the ignition coil during operation is judged.
On the basis of the above embodiment, in another embodiment of the present application, the process of determining whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal by the signal adjusting module 300 specifically includes:
and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, and if not, judging that the current starting cylinder chamber of the gas engine is abnormally started.
In the present embodiment, an implementation is given that determines whether the currently starting cylinder chamber of the gas engine is started correctly, specifically, based on the knock signal waveform and the actual ignition signal. The angle of the actual ignition signal may also be referred to as an ignition angle or an ignition advance angle, generally, when a certain cylinder chamber is ignited (started), the angle of the ignition signal of the cylinder chamber is generally earlier than the angle of the waveform of the knock signal, but the difference between the angles is not too large, and optionally, the value range of the preset angle threshold is 0-40 °.
On the basis of the above embodiment, in another embodiment of the present application, the process of adjusting the crankshaft signal of the gas engine by the signal adjusting module 300 specifically includes:
offsetting an angle of a crankshaft signal of the gas engine by 360 °.
In the present embodiment, a specific feasible way of adjusting the crankshaft signal of the gas engine is provided, because only the crankshaft signal is provided at the time of starting, the rotational speed phase determined by the gas engine according to the crankshaft signal is either correct or deviated by 360 °, so that when the starting is abnormal, the angle of the crankshaft signal of the gas engine is deviated by 360 ° to ensure that the next ignition is successful.
On the basis of the above embodiment, in a further embodiment of the present application, the signal adjusting module 300 is further configured to, after adjusting the crank signal angle of the gas engine, use the adjusted crank signal of the gas engine as the crank signal at the next starting cycle of the currently starting cylinder chamber of the gas engine or as the crank signal at the current starting cycle of the next starting cylinder chamber of the gas engine.
In this embodiment, after determining that the current starting cylinder chamber of the gas engine is abnormally started and adjusting the crank signal angle of the gas engine, the adjusted crank signal of the gas engine is used as the crank signal in the next starting period of the current starting cylinder chamber of the gas engine or as the crank signal in the current starting period of the next starting cylinder chamber of the gas engine to correct the quick determination phase for the starting process of the next starting cylinder chamber of the gas engine, so as to ensure that the next starting cylinder chamber of the starting engine can be normally started, or correct the quick determination phase for the starting process of the next starting period of the current starting cylinder chamber of the gas engine, so as to ensure that the next starting period of the current starting cylinder chamber of the gas engine can be normally started.
In summary, the present application provides a starting method and a starting system for a gas engine, wherein the starting method for the gas engine starts the gas engine according to a crankshaft signal when a camshaft signal of the gas engine is lost, acquires an actuator electrical interference signal of a currently started cylinder chamber of the gas engine and a knock signal waveform of the currently started cylinder chamber during the starting process, then acquires an actual ignition signal of the currently started cylinder chamber of the gas engine according to the actuator electrical interference signal, finally determines whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal, and adjusts the crankshaft signal of the gas engine when the currently started cylinder chamber of the gas engine is not correctly started, so that the currently started cylinder chamber can be normally started in a next starting cycle or a next starting cylinder chamber of the gas engine, the problem of unable normal start when the camshaft signal of gas engine loses is solved.
Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A starting method of a gas engine for controlling a gas engine to start when a camshaft signal of the gas engine is lost, the starting method of the gas engine comprising:
when the gas engine is started according to a crankshaft signal, acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber;
acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
2. The starting method of a gas engine according to claim 1, wherein said judging whether a currently starting cylinder chamber of said gas engine is correctly started based on said knock signal waveform and said actual ignition signal comprises:
and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, and if not, judging that the current starting cylinder chamber of the gas engine is abnormally started.
3. A starting method for a gas engine according to claim 2, characterized in that said predetermined angular threshold value ranges from 0 ° to 40 °.
4. The gas engine starting method according to claim 1, wherein said adjusting a crank signal of said gas engine comprises:
offsetting an angle of a crankshaft signal of the gas engine by 360 °.
5. The gas engine starting method according to claim 1, further comprising, after said adjusting a crank signal angle of said gas engine:
and taking the adjusted crankshaft signal of the gas engine as the crankshaft signal of the next starting period of the current starting cylinder chamber of the gas engine or the crankshaft signal of the current starting period of the next starting cylinder chamber of the gas engine.
6. A gas engine starting system for controlling a gas engine start when a camshaft signal of the gas engine is lost, the gas engine starting system comprising:
the signal acquisition module is used for acquiring an actuator electrical interference signal of a current starting cylinder chamber of the gas engine and a knock signal waveform of the current starting cylinder chamber when the gas engine is started according to a crankshaft signal;
the ignition signal module is used for acquiring an actual ignition signal of a current starting cylinder chamber of the gas engine according to the electric interference signal of the actuator;
and the signal adjusting module is used for judging whether the current starting cylinder chamber of the gas engine is correctly started or not according to the knock signal waveform and the actual ignition signal, and if not, adjusting a crankshaft signal of the gas engine.
7. The starting system of the gas engine as claimed in claim 6, wherein the process of determining whether the currently started cylinder chamber of the gas engine is correctly started according to the knock signal waveform and the actual ignition signal by the signal adjusting module specifically comprises:
and judging whether the angle of the actual ignition signal is advanced to the angle of the knock signal waveform by a preset angle threshold value or not, if so, judging that the current starting cylinder chamber of the gas engine is normally started, and if not, judging that the current starting cylinder chamber of the gas engine is abnormally started.
8. A gas engine starting system according to claim 7, characterized in that said predetermined angular threshold value ranges from 0 to 40 °.
9. The gas engine starting system according to claim 6, wherein the process of the signal adjusting module adjusting the crankshaft signal of the gas engine specifically comprises:
offsetting an angle of a crankshaft signal of the gas engine by 360 °.
10. The gas engine starting system according to claim 6, wherein the signal adjusting module is further configured to, after adjusting the crank signal angle of the gas engine, use the adjusted crank signal of the gas engine as the crank signal at the next starting cycle of the currently starting cylinder chamber of the gas engine or as the crank signal of the current starting cycle of the next starting cylinder chamber of the gas engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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