CN110296029B - Method and device for detecting state of jet valve - Google Patents
Method and device for detecting state of jet valve Download PDFInfo
- Publication number
- CN110296029B CN110296029B CN201910579160.9A CN201910579160A CN110296029B CN 110296029 B CN110296029 B CN 110296029B CN 201910579160 A CN201910579160 A CN 201910579160A CN 110296029 B CN110296029 B CN 110296029B
- Authority
- CN
- China
- Prior art keywords
- injection valve
- state
- air injection
- air
- time period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The embodiment of the invention provides a method and a device for detecting the state of a jet valve. The method comprises the following steps: firstly, acquiring corresponding air rail pressure of an air injection valve before and after each injection in a first time period, wherein the air injection valve injects M times in the first time period, and M is an integer greater than or equal to 2; calculating M first descending slopes corresponding to the air injection valve in a first time period according to the air rail pressure corresponding to the air injection valve before and after each injection; determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state. That is, in the embodiment of the invention, whether the amount of soot in the gas injection valve needs to be cleaned can be accurately determined according to the current state of the gas injection valve, thereby improving the power performance of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a method and a device for detecting the state of an air injection valve.
Background
During the running process of the vehicle, the carbon deposition amount of a gas spraying valve of a gas engine in the vehicle can be increased along with the increase of the working time and the difference of the quality of the gas. When the carbon deposition amount of the jet valve reaches a certain threshold value, the jet valve is blocked in different degrees, and the effective torque and the effective power output by the gas engine are reduced, so that the power performance of the whole vehicle is reduced.
In order to avoid the air injection valve from being blocked in different degrees so as to improve the power performance of the whole vehicle, in the prior art, the carbon deposition of the air injection valve is usually cleaned regularly so as to prevent the air injection valve from being blocked due to a large amount of carbon deposition, thereby improving the power performance of the whole vehicle. However, the determination of whether to clean the soot of the gas injection valve is usually made depending on the experience of the driver and the mileage of the vehicle.
Therefore, with the existing method, it is not possible to accurately determine whether the amount of soot in the air blast valve needs to be cleaned, so that the power performance of the entire vehicle is not high.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the state of a jet valve, which can accurately determine the time for cleaning carbon deposition in the jet valve, thereby improving the power performance of the whole vehicle.
In a first aspect, an embodiment of the present invention provides a method for detecting a state of a gas injection valve, where the method may include:
acquiring the corresponding air rail pressure of the air injection valve before and after each injection in a first time period; the gas injection valve injects M times in a first period of time; m is an integer greater than or equal to 2;
calculating M first descending slopes corresponding to the air injection valve in the first time period according to the air rail pressure corresponding to each time before and after injection;
determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state.
In one possible implementation, the determining the current state of the gas injection valve according to the M first falling slopes includes:
when the air injection valve is injected for the first time, acquiring a second descending slope corresponding to the air injection valve in a second time period;
and determining the current state of the gas injection valve according to the M first descending slopes and the second descending slopes.
In one possible implementation, the determining the current state of the gas injection valve according to the M first falling slopes and the second falling slopes includes:
respectively calculating difference absolute values of the second descending slope and the M first descending slopes to obtain M difference absolute values;
if the number of the difference absolute values which are larger than a preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state;
and if the number of the M absolute difference values larger than the preset threshold is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state, wherein N is the minimum integer larger than or equal to k x M, 0< k <1, and k is a proportionality coefficient.
In a possible implementation manner, the acquiring a second falling slope corresponding to the gas injection valve in a second time period when the gas injection valve injects for the first time includes:
when the jet valve is jetted for the first time, acquiring the corresponding air rail pressure of the jet valve before jetting and after jetting in the second time period;
and calculating a second descending slope corresponding to the gas nozzle in the second time period according to the gas rail pressure corresponding to the gas nozzle before and after the gas nozzle sprays in the second time period.
In one possible implementation, if the current state of the gas injection valve is a blocked state, the method further includes:
and outputting an early warning signal, wherein the early warning signal is used for prompting that the current state of the air injection valve is a blocking state.
In a second aspect, an embodiment of the present invention provides an apparatus for detecting a state of a gas injection valve, where the apparatus may include:
the acquisition module is used for acquiring the air rail pressure corresponding to the air injection valve before and after each injection in a first time period, wherein the air injection valve injects M times in the first time period, and M is an integer greater than or equal to 2;
the calculation module is used for calculating M first descending slopes corresponding to the air injection valve in the first time period according to the air rail pressure corresponding to each time before and after injection;
the determining module is used for determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state.
In a possible implementation manner, the determining module is specifically configured to obtain a second descending slope corresponding to the gas injection valve in a second time period when the gas injection valve injects for the first time; and determining the current state of the gas injection valve according to the M first descending slopes and the second descending slopes.
In a possible implementation manner, the determining module is specifically configured to calculate absolute difference values between the second falling slope and the M first falling slopes, respectively, to obtain M absolute difference values; if the number of the difference absolute values which are larger than the preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state; if the number of the M difference absolute values larger than the preset threshold is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state; wherein, N is the minimum integer which is more than or equal to k M, 0< k <1, and k is a proportionality coefficient.
In a possible implementation manner, the determining module is specifically configured to, when the injector injects for the first time, obtain a gas rail pressure corresponding to the injector before injection and after injection in a second time period; and calculating a second descending slope corresponding to the air injection valve in the second time period according to the air rail pressure corresponding to the air injection valve before and after the air injection valve injects in the second time period.
In a possible implementation manner, if the current state of the gas injection valve is a blocked state, the apparatus further includes:
and the output module is used for outputting an early warning signal, and the early warning signal is used for prompting that the current state of the air injection valve is a blocking state.
In a third aspect, an embodiment of the present invention further provides a detection apparatus, which may include a memory and a processor, where the memory is used to store program instructions; the processor is configured to read the program instructions in the memory, and execute the method for detecting the state of the purge valve according to any one of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer storage medium, which may include instructions that, when executed by one or more processors, cause a detection apparatus to perform the method for detecting a state of a gas injection valve according to any one of the first aspect.
The invention provides a method and a device for detecting the state of an air injection valve, which are characterized in that the air rail pressure corresponding to the air injection valve before and after each injection in a first time period is firstly obtained, wherein the air injection valve injects M times in the first time period, and M is an integer greater than or equal to 2; calculating M first descending slopes corresponding to the air injection valve in a first time period according to the air rail pressure corresponding to the air injection valve before and after each injection; determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state. That is, in the embodiment of the invention, whether the amount of soot in the gas injection valve needs to be cleaned can be accurately determined according to the current state of the gas injection valve, thereby improving the power performance of the whole vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for detecting a state of a jet valve according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another method for detecting the state of the air injection valve according to the embodiment of the present invention;
fig. 3 is a schematic flow chart of another method for detecting a state of a jet valve according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a detection device for detecting a state of a jet valve according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the present invention, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The specific application scenarios of the embodiment of the invention are as follows: during operation of a gas engine, the gas injection valves may become clogged to varying degrees due to an increase in the amount of carbon deposition, thereby reducing the power performance of the entire vehicle.
In order to accurately determine whether carbon deposition amount in the air injection valve needs to be cleaned or not, and therefore power performance of the whole vehicle is improved, the embodiment of the invention provides a method for detecting the state of the air injection valve, air rail pressure corresponding to the air injection valve before and after each injection in a first time period is obtained, and M first descending slopes corresponding to the air injection valve in the first time period are calculated according to the air rail pressure corresponding to the air injection valve before and after each injection; determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state. That is, in the embodiment of the invention, whether the amount of soot in the gas injection valve needs to be cleaned can be accurately determined according to the current state of the gas injection valve, thereby improving the power performance of the whole vehicle.
It should be noted that the method for detecting the state of the gas injection valve according to the embodiment of the present invention is performed when the gas engine is in the idle state and operates stably, and before the method for detecting the state of the gas injection valve is performed, whether the gas engine is in the idle and stable operation state may be determined by a Control logic in an Electronic Control Unit (ECU) of a vehicle, and when it is determined that the gas engine is in the idle state and operates stably, the method for detecting the state of the gas injection valve according to the embodiment of the present invention may be performed by a device for detecting the state of the gas injection valve.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method for detecting a state of a gas injection valve according to an embodiment of the present invention, and the method is applied to a gas engine, where the gas engine is provided with a gas engine and a gas injection valve, and the gas engine is in an idle state and runs stably. The method for detecting the state of the jet valve can be executed by a device for detecting the state of the jet valve, and the device for detecting the state of the jet valve can be independently arranged or arranged in an ECU. As shown in fig. 1, the method for detecting the state of the air injection valve may include:
s101, acquiring air rail pressure corresponding to the air injection valve before and after each injection in a first time period.
Wherein the gas injection valve injects M times in the first time period, and M is an integer greater than or equal to 2.
For example, when the gas injection valve injects 10 times in the first period, the gas rail pressure corresponding to the gas injection valve before injection and after injection in each of the 10 gas injection valves can be respectively obtained.
According to the example, before the gas rail pressure corresponding to the jet valve after the jet valve is injected before the jet valve is injected in the first time period is obtained, whether the engine is in an idling state and a stable operation state or not can be judged firstly according to the control logic in the ECU, when the gas engine is in the idling state and operates stably, the jet valve in the gas engine cannot be opened at the same time, the jet valve can be controlled to be opened only, and other jet valves are in a closed state. Thus, when the air injection valve is in an injection state, the air rail pressure of the air injection valve corresponding to the air rail pressure before and after each injection in the first time period is obtained. The air rail pressure value is a signal which changes along with the change of time.
Optionally, in the embodiment of the present invention, when acquiring the air rail pressures corresponding to the air injection valve before and after each injection in the first time period, the air rail pressures corresponding to the air injection valve before and after each injection may be acquired by an air rail pressure sensor, and of course, the air rail pressures corresponding to the air injection valve before and after each injection may also be acquired by other manners. The embodiment of the present invention is described by taking the example of acquiring the corresponding rail pressure before and after each injection of the injector by the rail pressure sensor, but the embodiment of the present invention is not limited thereto.
After acquiring the air rail pressure of the air injection valve corresponding to the time before and after each injection in the first time period through S101, the following S102 may be executed:
s102, calculating M first descending slopes corresponding to the air injection valve in the first time period according to the air rail pressure corresponding to the air injection valve before and after each injection in the first time period.
The first descending slope is a change slope of a gas rail pressure value corresponding to the gas injection valve along with time when each time of injection is carried out in a first time period. Normally, the air rail pressure value before the injection of the air injection valve is smaller than the air rail pressure value after the injection, therefore, the first descending slope is a negative value, and the size of the first descending slope value obtained in each injection is related to each injection time.
It can be understood that when the injector is injected multiple times in the first time period, multiple first falling slopes corresponding to the injector in the first time period can be calculated according to the air rail pressure corresponding to the injector before and after each injection in the multiple injection of the injector. For example, taking 10 times of injection of the gas injection valve in the first time period as an example, 10 descending slopes corresponding to the first time period are calculated according to the gas rail pressure of the 10 times of injection of the gas injection valve before and after injection.
After calculating M first falling slopes corresponding to the gas injection valve in the first time period through the above S102, the following S103 may be performed:
s103, determining the current state of the air injection valve according to the M first descending slopes.
Wherein the current state is a blocked state or a non-blocked state. When the current state of the gas injection valve is a non-blocking state, the gas quantity injected by the gas injection valve is within a normal working range, namely the gas rail pressure value of the gas injection valve after injection is within the normal working range; when the current state of the gas injection valve is a blocking state, the gas quantity ejected by the gas injection valve is lower than the gas quantity ejected during normal operation, namely the gas rail pressure value of the gas injection valve after injection is lower than the gas rail pressure value after normal operation injection.
When the current state of the jet valve is determined to be a blocking state, the fact that the amount of the carbon deposition in the jet valve is large and the carbon deposition of the jet valve needs to be cleaned is shown, on the contrary, when the current state of the jet valve is determined to be a non-blocking state, the fact that the amount of the carbon deposition in the jet valve is small is shown, the carbon deposition of the jet valve does not need to be cleaned, compared with the fact that whether the carbon deposition of the jet valve needs to be cleaned is determined through experience of a driver and driving mileage of a vehicle in the prior art, whether the amount of the carbon deposition in the jet valve needs to be cleaned can be accurately determined according to the current state of the jet valve, and therefore the power performance of the.
Therefore, in the embodiment of the invention, when the air injection valve is currently in the injection state, the air rail pressure of the air injection valve before and after each injection in the first time period is firstly obtained, and the M first descending slopes corresponding to the air injection valve in the first time period are calculated according to the air rail pressure before and after each injection; determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state. That is, in the embodiment of the invention, whether the amount of soot in the gas injection valve needs to be cleaned can be accurately determined according to the current state of the gas injection valve, thereby improving the power performance of the whole vehicle.
Based on the embodiment shown in fig. 1, in order to more clearly illustrate how to determine the current state of the gas injection valve according to the M first descending slopes in the embodiment of the present invention, for example, please refer to fig. 2, where fig. 2 is a schematic flow chart of another method for detecting a state of the gas injection valve provided in the embodiment of the present invention, the method for detecting a state of the gas injection valve may further include:
s201, when the air injection valve injects for the first time, acquiring a second descending slope corresponding to the air injection valve in a second time period.
When the gas injector is first injected, it can be understood that the gas injector is first used for injection after a new gas injector is replaced. For example, when the second descending slope corresponding to the gas injection valve is obtained, it may be determined whether the gas injection valve is newly replaced, if the gas injection valve is newly replaced, when the gas injection valve is injected for the first time, the descending slope corresponding to the second time period is obtained, and the descending slope corresponding to the second time period is determined as the second descending slope corresponding to the gas injection valve in the second time period. The second descending slope is the change slope of the air rail pressure value corresponding to the air injection valve along with time in a second time period. In general, the air rail pressure value before the injection of the air injection valve is smaller than the air rail pressure value after the injection, so that the second descending slope is a negative value, and the magnitude of the second descending slope value is related to the injection time.
Optionally, when the air injection valve is in the injection state for the first time, the air rail pressure corresponding to the air injection valve before and after injection in the second time period may be obtained when the air injection valve is in the injection state for the first time and the second descending slope corresponding to the air injection valve in the second time period is obtained; and calculating a second descending slope corresponding to the air injection valve in the second time period according to the air rail pressure corresponding to the air injection valve before and after the air injection valve injects in the second time period.
Optionally, in the embodiment of the present invention, when acquiring the gas rail pressures corresponding to the injection valve before injection and the injection valve after injection in the second time period, the gas rail pressures corresponding to the injection valve before injection and the injection valve after injection in the second time period may be acquired by using a gas rail pressure sensor, and of course, the gas rail pressures corresponding to the injection valve before injection and the injection valve after injection in the second time period may also be acquired by using other manners. Here, the embodiment of the present invention is only described as an example of acquiring the rail pressure corresponding to the injection valve before and after the injection of the injection valve in the second time period by using the rail pressure sensor, but the embodiment of the present invention is not limited thereto.
It is understood that, in the embodiment of the present invention, when the gas injection valve injects at least two times in the second period, according to the gas rail pressure before each of the at least two gas injection valve injections and after the gas injection valve injects, at least two second falling slopes corresponding to the second period may be calculated. For example, taking 10 times of injection by the gas injection valve in the second time period as an example, the second time period corresponds to 10 descending slopes, after obtaining the 10 descending slopes, in order to improve the accuracy of the second descending slope corresponding to the gas injection valve in the second time period, an average value of at least two descending slopes of the 10 descending slopes may be calculated, and the average value of the at least two descending slopes may be determined as the second descending slope corresponding to the gas injection valve in the second time period.
After the second descending slope corresponding to the gas injection valve in the second time period is obtained through the above S201, the following S202 may be performed:
s202, calculating difference absolute values of the second descending slope and the M first descending slopes respectively to obtain M difference absolute values.
S203, judging whether the number of the difference absolute values which are larger than a preset threshold value in the M difference absolute values is larger than N.
And S204, if the number of the difference absolute values which are larger than the preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state.
The preset threshold may be set according to actual needs, and here, how to set the preset threshold is not specifically limited in the embodiment of the present invention.
For example, in the embodiment of the present invention, if the injector is injected 10 times in the first time period, 10 first descending slopes corresponding to the injector in the first time period are obtained by calculating the gas rail pressures corresponding to the injector before and after 10 injections in the first time period, 10 absolute difference values can be obtained by calculating the absolute difference value between the second descending slope and the 10 first descending slopes, the proportionality coefficient k is set to 0.3, N is the minimum integer greater than or equal to 0.3 × 10, N is 3, if the number of the absolute difference values greater than the preset threshold in the 10 absolute difference values is 6, and since the number of the absolute difference values greater than the preset threshold is 6 greater than N, the current state of the injector is determined to be the blocked state.
For example, in the embodiment of the present invention, if the injector is injected 13 times in the first time period, 13 first descending slopes corresponding to the injector in the first time period are obtained by calculating the gas rail pressures corresponding to the injector before and after 13 injections in the first time period, 13 absolute difference values can be obtained by calculating the absolute difference values between the second descending slope and the 13 first descending slopes, the proportionality coefficient k is set to 0.3, N is the minimum integer greater than or equal to 0.3 and 13, N is the minimum integer 4 greater than 3.9, if the number of the absolute difference values greater than the preset threshold is 6, and since the number of the absolute difference values greater than the preset threshold is 6 greater than N, the current state of the injector is determined to be the blocked state.
When the current state of the jet valve is determined to be the blocking state, the fact that the amount of the carbon deposition in the jet valve is large and the carbon deposition of the jet valve needs to be cleaned is shown, compared with the fact that whether the carbon deposition of the jet valve needs to be cleaned is determined through experience of a driver and driving mileage of a vehicle in the prior art, the amount of the carbon deposition in the jet valve needs to be cleaned can be accurately determined according to the blocking state of the jet valve, effective power and effective torque output by a gas engine are improved, and therefore the power performance of the whole vehicle is improved.
And S205, if the number of the M absolute difference values which are larger than the preset threshold value is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state.
For example, in the embodiment of the present invention, if the injector is injected 10 times in the first time period, 10 first descending slopes corresponding to the injector in the first time period are obtained by calculating the gas rail pressures corresponding to the injector before and after 10 injections in the first time period, 10 absolute difference values can be obtained by calculating the absolute difference value between the second descending slope and the 10 first descending slopes, the proportionality coefficient k is set to 0.3, N is the minimum integer greater than or equal to 0.3 × 10, N is 3, if the absolute difference value of the 10 absolute difference values is greater than or equal to 2, and since the absolute difference value of the greater than the preset threshold is 2 less than N, the current state of the injector is determined to be the non-blocking state.
For example, in the embodiment of the present invention, if the injector is injected 13 times in the first time period, 13 first descending slopes corresponding to the injector in the first time period are obtained by calculating the gas rail pressures corresponding to the injector before and after 13 injections in the first time period, 13 absolute difference values can be obtained by calculating the absolute difference values between the second descending slope and the 13 first descending slopes, the proportionality coefficient k is set to 0.3, N is the minimum integer greater than or equal to 0.3 and 13, N is the minimum integer 4 greater than 3.9, if the number of the absolute difference values greater than the preset threshold is 2, and since the number of the absolute difference values greater than the preset threshold is 2 and less than N, the current state of the injector is determined to be the non-blocking state.
For example, in the embodiment of the present invention, if the injector is injected 13 times in the first time period, 13 first descending slopes corresponding to the injector in the first time period are obtained by calculating the gas rail pressures corresponding to the injector before and after 13 injections in the first time period, 13 absolute difference values can be obtained by calculating the absolute difference values between the second descending slope and the 13 first descending slopes, the proportionality coefficient k is set to 0.3, N is the minimum integer greater than or equal to 0.3 and 13, N is the minimum integer 4 greater than 3.9, if the number of the absolute difference values greater than the preset threshold is 4, and since the number of the absolute difference values greater than the preset threshold is 4, the current state of the injector is determined to be the non-blocking state.
When the current state of the air injection valve is determined to be a non-blocking state, the fact that the carbon deposition amount in the air injection valve is small at present is indicated, the carbon deposition of the air injection valve does not need to be cleaned, and therefore resource waste caused by cleaning operation of the air injection valve when the carbon deposition amount in the air injection valve is small is avoided.
Therefore, in the embodiment of the invention, the plurality of absolute difference values calculated in the first time period are compared with the preset threshold, and the current state of the air injection valve is determined by judging the number of the absolute difference values larger or smaller than the preset threshold, that is, the proportion of the number meeting the conditions in the total number is judged, so that the occurrence of erroneous judgment can be prevented, and the judgment accuracy is further improved.
Based on the embodiment shown in fig. 1 or fig. 2, after the current state of the gas injection valve is determined to be the blocking state, the driver can be reminded to clean the gas injection valve in time. For example, please refer to fig. 3, where fig. 3 is a schematic flow chart of another method for detecting a state of a jet valve according to an embodiment of the present invention, the method for detecting a state of a jet valve may further include:
and S301, outputting an early warning signal.
Wherein, the early warning signal is used for promoting the current state of jet valve to be the jam state.
For example, the warning signal may be "you are good, please clean the air injection valve", or "the air injection valve is blocked, please clean the air injection valve", or the like.
Optionally, when the early warning signal is output, the early warning signal may be output in a voice manner; the early warning signal can also be output in a text mode; of course, the early warning signal can be output in a voice mode and a text mode at the same time. Here, the embodiments of the present invention are only described by taking these three possible implementation manners as examples, but do not represent that the embodiments of the present invention are limited thereto.
According to the embodiment of the invention, the early warning signal is output, so that a driver can be reminded of finding the blockage of the gas injection valve in time, the gas injection valve is cleaned in advance, and the effective power and the effective torque output by the gas engine are improved, so that the power performance of the whole vehicle is improved.
Fig. 4 is a schematic flow chart of a detection device 40 for a state of a jet valve according to an embodiment of the present invention, which is applied to a gas engine, where the gas engine is provided with a gas engine and a jet valve, and the gas engine is in an idle state and runs stably, and the detection device 40 for a state of a jet valve according to this embodiment may be independently arranged or may be arranged in an ECU. For example, referring to fig. 4, the detection device 40 for detecting the state of the air injection valve may include:
the acquiring module 401 is configured to acquire an air rail pressure corresponding to an air injection valve before and after each injection in a first time period, where the air injection valve injects M times in the first time period, and M is an integer greater than or equal to 2.
The calculating module 402 is configured to calculate M first falling slopes corresponding to the injector in a first time period according to the air rail pressure corresponding to the injector before and after each injection.
A determining module 403, configured to determine a current state of the air injection valve according to the M first falling slopes; wherein the current state is a blocked state or a non-blocked state.
Optionally, the determining module 403 is specifically configured to obtain a second descending slope corresponding to the gas injection valve in a second time period when the gas injection valve injects for the first time; and determining the current state of the gas injection valve according to the M first falling slopes and the second falling slopes.
Optionally, the determining module 403 is specifically configured to calculate absolute values of differences between the second descending slope and the M first descending slopes, respectively, to obtain M absolute values of differences.
If the number of the difference absolute values which are larger than the preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state; if the number of the M difference absolute values larger than the preset threshold is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state; wherein N is greater than k M and is rounded, 0< k <1, and k is a proportionality coefficient.
Optionally, the determining module 403 is specifically configured to, when the air injection valve injects for the first time, obtain air rail pressure corresponding to the air injection valve before injection and after injection in the second time period; and calculating a second descending slope corresponding to the air injection valve in the second time period according to the air rail pressure corresponding to the air injection valve before and after the air injection valve injects in the second time period.
Optionally, if the current state of the purge valve is a blocked state, the detection apparatus 401 for the purge valve state further includes:
and the output module 404 is configured to output an early warning signal, where the early warning signal is used to prompt that the current state of the air injection valve is a blocking state.
The detection apparatus 40 for detecting the state of the air injection valve shown in the embodiment of the present invention may implement the technical solution of the detection method for detecting the state of the air injection valve shown in any one of the above-mentioned fig. 1 to fig. 3, and the implementation principle and the beneficial effects thereof are similar to those of the detection method for detecting the state of the air injection valve, and are not described herein again.
Fig. 5 is a schematic structural diagram of a detection apparatus 50 according to an embodiment of the present invention, for example, as shown in fig. 5, the detection apparatus 50 may include a processor 501 and a memory 502, wherein,
the memory 502 is used to store program instructions;
the processor 501 is configured to read the program instruction in the memory 502, and execute the technical solution of the method for detecting the state of the air injection valve in the embodiment shown in any one of fig. 1 to fig. 3 according to the program instruction in the memory 502, which has similar implementation principles and beneficial effects to those of the method for detecting the state of the air injection valve, and is not described herein again.
An embodiment of the present invention further provides a computer storage medium, which includes instructions, and when the instructions are executed by one or more processors, the detection apparatus executes the technical solution of the method for detecting a state of an air injection valve in the embodiment shown in any one of fig. 1 to fig. 3, and an implementation principle and beneficial effects of the method for detecting a state of an air injection valve are similar to those of the method for detecting a state of an air injection valve, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A jet valve state detection method is applied to a gas engine, wherein a jet valve is arranged in the gas engine, and the gas engine is in an idling state and runs stably, and the method comprises the following steps:
acquiring the corresponding air rail pressure of the air injection valve before and after each injection in a first time period; the gas injection valve injects M times in a first period of time; m is an integer greater than or equal to 2;
calculating M first descending slopes corresponding to the air injection valve in the first time period according to the air rail pressure corresponding to the air injection valve before and after each injection, wherein the first descending slopes are the changing slopes of the air rail pressure value corresponding to the air injection valve along with the time when each injection is carried out in the first time period;
determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state.
2. The method of claim 1, wherein said determining a current state of the gas injection valve from the M first falling slopes comprises:
when the air injection valve is injected for the first time, acquiring a second descending slope corresponding to the air injection valve in a second time period, wherein the second descending slope refers to the change slope of the air rail pressure value corresponding to the air injection valve along with the time in the second time period;
and determining the current state of the gas injection valve according to the M first descending slopes and the second descending slopes.
3. The method of claim 2, wherein said determining a current state of the gas injection valve from the M first and second falling slopes comprises:
respectively calculating difference absolute values of the second descending slope and the M first descending slopes to obtain M difference absolute values;
if the number of the difference absolute values which are larger than the preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state;
if the number of the M difference absolute values larger than the preset threshold is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state; wherein, N is the minimum integer which is more than or equal to k M, 0< k <1, and k is a proportionality coefficient.
4. The method of claim 3, wherein obtaining a second decreasing slope for the gas injection valve for a second time period when the gas injection valve is first fired comprises:
when the air injection valve is injected for the first time, acquiring air rail pressure corresponding to the air injection valve before injection and after injection in the second time period;
and calculating a second descending slope corresponding to the gas nozzle in the second time period according to the gas rail pressure corresponding to the gas nozzle before and after the gas nozzle sprays in the second time period.
5. The method according to any one of claims 1 to 4, wherein if the current state of the gas injection valve is a blocked state, the method further comprises:
and outputting an early warning signal, wherein the early warning signal is used for prompting that the current state of the air injection valve is a blocking state.
6. The utility model provides a detection apparatus for jet valve state, its characterized in that is applied to gas engine, be provided with the jet valve among the gas engine, gas engine is in idle state and operates stably, and the device includes:
the acquisition module is used for acquiring the air rail pressure of the air injection valve corresponding to the air rail pressure before and after each injection in a first time period; the gas injection valve injects M times in a first period of time; m is an integer greater than or equal to 2;
the calculation module is used for calculating M first descending slopes corresponding to the air injection valve in the first time period according to the air rail pressure corresponding to the air injection valve before and after each injection, wherein the first descending slopes are the changing slopes of the air rail pressure value corresponding to the air injection valve along with time when each injection is carried out in the first time period;
the determining module is used for determining the current state of the air injection valve according to the M first descending slopes; wherein the current state is a blocked state or a non-blocked state.
7. The apparatus of claim 6,
the determining module is specifically used for acquiring a second descending slope corresponding to the air injection valve in a second time period when the air injection valve is injected for the first time; and determining the current state of the air injection valve according to the M first descending slopes and the second descending slopes, wherein the second descending slope is the change slope of the air injection valve corresponding to the air rail pressure value along with the time in the second time period.
8. The apparatus of claim 7,
a determining module, configured to calculate absolute values of differences between the second falling slope and the M first falling slopes, respectively, to obtain M absolute values of differences; if the number of the difference absolute values which are larger than the preset threshold value in the M difference absolute values is larger than N, determining that the current state of the air injection valve is a blocking state; if the number of the M difference absolute values larger than the preset threshold is smaller than or equal to N, determining that the current state of the air injection valve is a non-blocking state; wherein, N is the minimum integer which is more than or equal to k M, 0< k <1, and k is a proportionality coefficient.
9. The apparatus of claim 8,
the determining module is specifically used for acquiring the corresponding air rail pressure of the air injection valve before and after injection in the second time period when the air injection valve is injected for the first time; and calculating a second descending slope corresponding to the gas nozzle in the second time period according to the gas rail pressure corresponding to the gas nozzle before and after the gas nozzle sprays in the second time period.
10. The apparatus according to any one of claims 6 to 9, wherein if the current state of the gas injection valve is a blocked state, the apparatus further comprises:
and the output module is used for outputting an early warning signal, and the early warning signal is used for prompting that the current state of the air injection valve is a blocking state.
11. A detection device, comprising a memory and a processor, wherein,
the memory is to store program instructions;
the processor is used for reading the program instructions in the memory and executing the method for detecting the state of the air injection valve according to any one of the claims 1-5 according to the program instructions in the memory.
12. A computer storage medium comprising instructions that, when executed,
the instructions, when executed by one or more processors, cause a detection device to perform a method of detecting a state of a jet valve as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579160.9A CN110296029B (en) | 2019-06-28 | 2019-06-28 | Method and device for detecting state of jet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579160.9A CN110296029B (en) | 2019-06-28 | 2019-06-28 | Method and device for detecting state of jet valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110296029A CN110296029A (en) | 2019-10-01 |
| CN110296029B true CN110296029B (en) | 2020-10-30 |
Family
ID=68029527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910579160.9A Active CN110296029B (en) | 2019-06-28 | 2019-06-28 | Method and device for detecting state of jet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110296029B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963280B (en) * | 2021-03-23 | 2022-04-15 | 一汽解放汽车有限公司 | Method for detecting state of air injection valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121844A (en) * | 2016-08-31 | 2016-11-16 | 潍柴动力股份有限公司 | Detection method, device and the automobile of a kind of vent valve Block failure |
| CN107402125A (en) * | 2017-07-21 | 2017-11-28 | 中国第汽车股份有限公司 | The online test method of natural gas engine gas nozzle clamping stagnation |
| CN109340007A (en) * | 2018-09-27 | 2019-02-15 | 潍柴动力股份有限公司 | A kind of fuel injector jam judging method and device |
| CN109681304A (en) * | 2018-12-25 | 2019-04-26 | 上海星融汽车科技有限公司 | A kind of SCR system urea nozzle blocking recognition methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2529781A (en) * | 2015-12-01 | 2016-03-02 | Gm Global Tech Operations Inc | Method of detecting a clogging of a fuel injector in an internal combustion engine |
-
2019
- 2019-06-28 CN CN201910579160.9A patent/CN110296029B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121844A (en) * | 2016-08-31 | 2016-11-16 | 潍柴动力股份有限公司 | Detection method, device and the automobile of a kind of vent valve Block failure |
| CN107402125A (en) * | 2017-07-21 | 2017-11-28 | 中国第汽车股份有限公司 | The online test method of natural gas engine gas nozzle clamping stagnation |
| CN109340007A (en) * | 2018-09-27 | 2019-02-15 | 潍柴动力股份有限公司 | A kind of fuel injector jam judging method and device |
| CN109681304A (en) * | 2018-12-25 | 2019-04-26 | 上海星融汽车科技有限公司 | A kind of SCR system urea nozzle blocking recognition methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110296029A (en) | 2019-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8359826B2 (en) | Trouble diagnosis device and trouble diagnosis method for NOx sensor | |
| JP4265645B2 (en) | Fuel injection device | |
| US8061331B2 (en) | Fuel injector for internal combustion engine | |
| WO2011125167A1 (en) | Control device for internal combustion engine | |
| CN101802358B (en) | Method for detecting the minimum opening time of a reducing agent feed device in an exhaust gas aftertreatment system comprising an SCR catalyst | |
| CN112392578B (en) | Detection method for urea injection system, vehicle control device, and storage medium | |
| US20090165543A1 (en) | ERROR DETECTION APPARATUS FOR NOx SENSOR AND EXHAUST GAS CLEANING SYSTEM HAVING THE SAME | |
| CN110296029B (en) | Method and device for detecting state of jet valve | |
| US20150369154A1 (en) | System and method for estimating the quantity of particulate accumulated in the particulate filter of a diesel engine | |
| CN105229285A (en) | Upstream NOx estimates | |
| CN103492699A (en) | Injector nozzle coking compensation strategy | |
| JP2008231996A (en) | Control device of internal combustion engine | |
| EP3045704B1 (en) | Monitoring device for fuel injection quantity control device | |
| KR101877946B1 (en) | Method at fuel injection | |
| US9416748B2 (en) | Method of compensating for injector aging | |
| JP2014084754A (en) | Rail pressure sensor output characteristic diagnostic method, and common rail-type fuel injection control device | |
| CN115539183A (en) | Gas drive urea injection system fault diagnosis method, device and system and storage medium | |
| JP5375271B2 (en) | Fuel injection control device | |
| US10815850B2 (en) | Method for catalyst purge control based on engine temperature and vehicle using the same | |
| JP5343944B2 (en) | Fuel injection control device | |
| CN114810298A (en) | Urea nozzle fault detection method and device, storage medium and vehicle | |
| EP3091214A1 (en) | Monitoring method to monitor the built up of obstructing coatings due to coking in sprayholes of a fuel injector jet nozzle, compensation method to compensate negative effects of these obstructing coatings and electronic control unit for a combustion engine | |
| JP6742100B2 (en) | Fuel injection control device and fuel injection control method | |
| KR102596704B1 (en) | Method for learning at least one pump feature of a pump of a feed module of a scr catalyst system | |
| KR102473710B1 (en) | Method and apparatus for fuel amount training and compensation in GDI engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |