CN115306526A - Detection information processing method, device, medium, sensor and EMS system - Google Patents
Detection information processing method, device, medium, sensor and EMS system Download PDFInfo
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- CN115306526A CN115306526A CN202211015697.0A CN202211015697A CN115306526A CN 115306526 A CN115306526 A CN 115306526A CN 202211015697 A CN202211015697 A CN 202211015697A CN 115306526 A CN115306526 A CN 115306526A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
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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 invention belongs to the technical field of intelligent vehicles, and particularly relates to a detection information processing method, a detection information processing device, a detection information processing medium, a detection information processing sensor and an EMS (Engine Management System); the characteristic data of the back oxygen sensor in the slow response detection process from rich to lean is obtained by actively changing the air-fuel ratio and receiving the parameters of the sensor, namely, the integral area of the back oxygen sensor from rich to lean is solved by reducing the lean of the mixed gas, and the target state is judged by the statistical characteristics of the integral data; when the integral area is larger than a threshold value, a fault can be diagnosed; is less than or equal to the threshold value and is diagnosed as normal; on the other hand, by introducing the flow integration process synchronously, the monitoring frequency IUPR (In-Use Performance Ratio) of the process from rich to lean diagnosis can be processed; in addition, the response time of the voltage of the rear oxygen sensor can be obtained through table lookup and interpolation calculation according to the voltage integral area of the rear oxygen sensor, and then the response time is output to the catalytic converter diagnosis module to correct the calculation process of the gas storage amount.
Description
Technical Field
The invention belongs to the technical field of intelligent vehicles, and particularly relates to a detection information processing method, a detection information processing device, a detection information processing medium, a detection information processing sensor and an EMS system.
Background
Under the exhaust gas sensor structure with the layout as shown in FIG. 1, the fault that the voltage of the rear oxygen sensor is rich to lean and slow in response needs to be diagnosed and reminded; the active fuel cut-off method as shown in fig. 2 is derived from a fuel Vehicle, but for the implementation of a Hybrid Electric Vehicle (HEV), a Plug-in Hybrid Electric Vehicle (PHEV) or an Extended Range Electric Vehicle (EREV), some technical problems may occur as follows:
on the one hand, the active control fuel cut-off can lead to the power generation power fluctuation in the process of carrying out the slow response fault diagnosis of the oxygen voltage, further can influence the smoothness of a vehicle and the balance of electric quantity, and simultaneously, the difficulty of torque control of motor parts is increased.
On the other hand, in order to implement the diagnostic function, a plurality of Control units such as a Vehicle Control Unit VCU (Vehicle Control Unit) and an Engine Management System EMS (Engine Management System) need to cooperate, which increases the complexity of the System and is not favorable for rapid development and upgrade of products.
In addition, the related art lacks of good control and monitoring of the diagnosis timing, response time, and the like, so that the operating efficiency and monitoring timeliness of the system are poor.
Disclosure of Invention
The embodiment of the invention discloses a detection information processing method, which comprises a first working condition intervention step and a second integral diagnosis step; the first working condition intervention step comprises a first initialization step and a first lean reduction intervention step; the first initialization step acquires current working condition information, and if the current working condition information meets a preset diagnosis enabling condition, the first lean reduction intervention step adjusts the air-fuel ratio lambda to X so as to enter a subsequent processing process.
Further, the second integration diagnosis step further comprises a second master integration step and a second slave integration step; a second main integration step of acquiring a second detection value of a second sensor; the second detection value is a magnitude of the physical quantity detected by the second sensor; if the second detection value decays from the first threshold value u1 to a second threshold value u2 with the time t, performing a second main integral on the second detection value in a time interval of acquiring the first threshold value u1 and acquiring the second threshold value u2, and recording a value of the second main integral as S1; repeating the second integral diagnosis step to obtain a second integral value and recording the second integral value as S2; wherein the second slave integral and the second master integral adopt the same processing procedure or integral variable.
Specifically, the second sensor may be a rear oxygen sensor, and the second detection value is a rear oxygen voltage u; the first lean-reducing intervening step is used for reducing the concentration of the mixed intake air from the air inlet channel to the position where the internal combustion engine enters the cylinder and keeping the concentration for a preset time; the current working condition information comprises at least one of exhaust flow, engine speed, temperature at the rear oxygen sensor, voltage of the rear oxygen sensor and air-fuel ratio information.
Further, the method embodiment of the present invention further includes a third synchronization processing step; the third synchronous processing step also comprises a third flow integration step and a third frequency refreshing step; a third flow integration step of the method obtains a third flow integration of the exhaust, and the third flow integration synchronously starts at the starting moment of the second main integration; and if the value of the third oxygen flow integral reaches a third oxygen flow threshold value max, ending the third oxygen flow integral, and marking the times m of the third oxygen flow integral as 1.
Specifically, if the diagnosis enable condition is valid, the third flow integration step may be executed again, and the third flow integration step may be ended in the same manner, and the number m of third flow integrations may be increased by 1.
Further, the second integral diagnosis step can be used for diagnosing that the oxygen sensor voltage slowly reacts from high concentration to low concentration, if a third statistical value preset by a value S1 of a second main integral and a value S2 of a second slave integral is smaller than or equal to a third integral threshold Smax, the diagnosis is finished, and the voltage response of the post-oxygen sensor is normal; otherwise, outputting a fault prompt signal or starting a related fault processing process.
Further, the method embodiment of the present invention may further include a fourth conversion output step; the fourth conversion output step can also comprise a fourth table look-up conversion step and a fourth parameter correction step; a fourth table look-up conversion step of converting the second integral data obtained In the second integral diagnosis step into fourth response time data by a table look-up method according to a preset integral/time conversion table, and a fourth parameter correction step of updating the monitoring frequency IUPR (In-Use Performance Ratio) so that the monitoring frequency IUPR is increased by 1; the third synchronous processing step outputs fourth response time data to the catalyst diagnostic module for correcting the catalyst parameter.
The embodiment of the invention also discloses a detection information processing device, which comprises a first working condition intervention unit and a second integral diagnosis unit; the first working condition intervention unit further comprises a first initialization unit and a first lean reduction intervention unit; a first initialization unit acquires current working condition information, and if the current working condition information meets a preset diagnosis enabling condition, a first lean reduction intervention unit adjusts the air-fuel ratio lambda to X; the second integral diagnosis unit comprises a second main integral unit and a second slave integral unit; the second main integration unit acquires a second detection value of the second sensor; the second detection value is the magnitude of the physical quantity detected by the second sensor; if the second detection value decays from the first threshold value u1 to a second threshold value u2 with the time t, performing a second main integral on the second detection value in a time interval of acquiring the first threshold value u1 and acquiring the second threshold value u2, and recording a value of the second main integral as S1; the second integral diagnosis unit also obtains a second value of the slave integral and records the value as S2; wherein the second slave integral and the second master integral adopt the same processing procedure or integral variable.
Specifically, the second sensor may be a rear oxygen sensor, and the second detection value is a rear oxygen voltage u; the first lean reducing intervening unit reduces the concentration of the mixed intake air from the intake passage to the cylinder of the internal combustion engine and keeps the concentration for a preset time; the current working condition information comprises at least one of exhaust flow, engine speed, temperature of a rear oxygen sensor, voltage of the rear oxygen sensor and air-fuel ratio information.
Further, the product embodiment of the present invention may further include a third synchronous processing unit; the third synchronous processing unit can also comprise a third flow integration unit and a third frequency refreshing unit; a third flow integration unit of the exhaust gas control system acquires a third flow integration of the exhaust gas; at this time, the third oxygen flow integral synchronization starts at the start time of the second main integral.
Specifically, if the value of the third oxygen flow integral reaches a third oxygen flow threshold max, the third oxygen flow integral is ended, and the number m of the third oxygen flow integral is marked as 1; if the diagnosis enabling condition is valid, the third flow integrating unit can end the integration process in the same way, and increase the number m of third flow integration by 1; the second integral diagnosis unit is used for diagnosing the slow reaction of the oxygen sensor voltage from the rich state to the lean state, if a preset third statistical value of a second main integral value S1 and a second slave integral value S2 is smaller than or equal to a third integral threshold value Smax, the diagnosis is finished, and the voltage response of the back oxygen sensor is normal; otherwise, a fault prompt signal can be output.
Further, the embodiment of the apparatus of the present invention may further include a fourth conversion output unit; the fourth conversion output unit can also comprise a fourth table look-up conversion unit and a fourth parameter correction unit; a fourth lookup conversion unit converts second integral data obtained in the second integral diagnosis unit into fourth response time data by a lookup method according to a preset integral/time conversion table, and a fourth parameter correction unit updates the monitoring frequency IUPR so that the monitoring frequency IUPR is increased by 1; the third synchronous processing unit outputs the fourth response time data to the catalyst diagnosis module to correct the parameter of the catalyst.
Further, based on the above inventive concept, it is conceivable that the related method and apparatus are implemented in the following products; the computer storage medium includes a storage medium body for storing a computer program; the computer program can realize any one of the detection information processing methods when being executed by a microprocessor; similarly, any of the above-described detection information processing devices and/or any of the storage media may be used as the relevant sensor.
In addition, in view of the processing process of the method and the product, the related fault detection function can be realized in the EMS system, the cooperative limitation among a plurality of execution units is avoided, and the product development efficiency is improved; similarly, the system may also include any one of the above devices, media or sensors, and the implementation thereof is not described in detail.
In summary, the technical problems solved by the present invention mainly include the following items:
on the one hand, the problem that the HEV needs cooperation of a plurality of controllers when a back oxygen sensor is diagnosed from rich to lean is solved, the HEV can be realized only by EMS, the system complexity and the communication cost can be reduced, and the development period is greatly shortened.
On the other hand, the embodiment of the invention can synchronously provide the IUPR diagnosis frequency of the slow diagnosis of the late oxygen sensor from rich to lean reaction, and can simultaneously output the core parameters such as response time and the like.
In a third aspect, the embodiment of the invention realizes the diagnosis function through the proper lean reducing mixed gas, and avoids the influence of active fuel cut on the power generation power and the driving smoothness.
In addition, the invention diagnoses the fault when the oxygen sensor is rich to lean by changing the air-fuel ratio and the voltage integral, has clear logic process and is beneficial to being realized on a microprocessor.
It should be noted that the terms "first", "second", and the like are used herein only for describing the components in the technical solution, and do not constitute a limitation on the technical solution, and are not understood as an indication or suggestion of the importance of the corresponding component; an element in the similar language "first", "second", etc. means that in the corresponding embodiment, the element includes at least one.
Drawings
To more clearly illustrate the technical solutions of the present invention and to facilitate further understanding of the technical effects, technical features and objects of the present invention, the present invention will be described in detail with reference to the accompanying drawings, which form an essential part of the specification, and which are used together with the embodiments of the present invention to illustrate the technical solutions of the present invention, but do not limit the present invention.
The same reference numerals in the drawings denote the same elements, and in particular:
FIG. 1 is a schematic diagram of a sensor layout according to an embodiment of the present invention,
FIG. 2 is a schematic flow chart of an active oil-break method in the related art;
FIG. 3 is a schematic diagram of area calculations for different response times for the method and product embodiments of the present invention;
FIG. 4 is a schematic flow chart of an embodiment of the method and product of the present invention;
FIG. 5 is a schematic flow chart of an embodiment of the method of the present invention;
FIG. 6 is a schematic flow chart illustrating intervention of a first operating mode according to an embodiment of the method of the present invention;
FIG. 7 is a schematic view of a second diagnostic integration flow according to an embodiment of the method of the present invention;
FIG. 8 is a flowchart illustrating a third synchronization process according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a fourth conversion output flow according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a table lookup process according to embodiments of the method and product of the present invention;
FIG. 11 is a schematic structural diagram of an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a first operation condition intervention unit according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a second integral diagnostic unit according to an embodiment of the present invention;
FIG. 14 is a block diagram of a third synchronous processing unit according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a fourth exemplary embodiment of a conversion output unit;
FIG. 16 is a first block diagram of an embodiment of the present invention;
FIG. 17 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 18 is a third schematic structural diagram of an embodiment of the present invention;
fig. 19 is a fourth schematic structural diagram of the product of the present invention.
Wherein:
001-the information of the current working condition,
002-the second detected value of the first detected value,
003-conditions for the diagnosis to be enabled,
100-a first condition intervening step,
111-a first initialization step in which the first initialization step,
122-a first step of enleanment intervention,
200-a second integral diagnosis step of the second integral,
211-a second main integration step in which,
222-a second slave integration step,
300-a third step of synchronous processing,
301-monitoring the frequency IUPR,
311-a third flow integration step,
322-a third frequency of refresh steps,
333-a third integration threshold Smax,
400-a fourth step of converting the output,
411-a fourth step of table look-up conversion,
422-a fourth parameter modification step of the method,
500-an integration/time conversion table,
510-a first condition intervention unit for a first condition,
520-a second integral diagnostic unit for the second,
530-a third step of the synchronization process,
540-a fourth step of converting the output,
555-fourth response time data of the second response time,
666-a sixth fault indication signal,
720-the first sensor voltage,
810-the time axis of the operation,
820-the axis of the voltage-the axis,
821-the first threshold value u1 of the first threshold value,
822-a second threshold value u2 for the first threshold value,
881-the voltage is u1 at the time t1,
882-voltage u2 at time t2,
888-an example of an integral operation,
8R 1-the value S1 of the second main integral,
8R 2-the value of the second slave integral S2,
900-the vehicle is driven by the vehicle,
901-the position of the sensor(s),
903-a storage medium that is capable of,
905-detecting the information-processing device,
907-an EMS module for the communication network,
910-the exhaust duct(s),
911-second sensor, post-oxygen sensor;
919-a first sensor, a front oxygen sensor;
920-an air inlet channel,
930-the internal-combustion engine,
999-related technical scheme flow.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. Of course, the following specific examples are provided only for explaining the technical solutions of the present invention, and are not intended to limit the present invention. In addition, the portions shown in the embodiments or the drawings are only illustrations of the relevant portions of the present invention, and are not all of the present invention.
In the embodiment of the invention, the air-fuel ratio is actively changed, namely the mixture is diluted, and the integral area of the oxygen sensor voltage from rich to lean is calculated, as shown in fig. 3, the integral area comprises 3 voltage curves: three possible states S _1, S _2, S _3 respectively representing the rich to lean response of the post-oxygen sensor voltage, the response time can be obtained by looking up the table corresponding to FIG. 10, and the voltage integral area can be calculated by the following formula: s = int (u, t, t1, t 2); wherein the content of the first and second substances,
s-voltage integral area;
t 1-voltage is at time u 1;
t 2-voltage is at time u 2;
a u-voltage;
int is the integral operator.
The comparison of the integral areas shows that the response speed of the back oxygen sensor is fast or slow when the voltage is rich to be dilute, and when the integral area is larger than a certain threshold value, a fault can be diagnosed; and if the fault threshold value is less than or equal to the fault threshold value, the diagnosis is normal.
On the other hand, by introducing a flow integration process in synchronism, the monitoring frequency IUPR of the diagnostic process from rich to lean can be processed.
In addition, the response time of the voltage of the rear oxygen sensor can be obtained through table lookup and interpolation calculation according to the voltage integral area of the rear oxygen sensor, and then the response time is output to the catalytic converter diagnosis module to correct the calculation process of the gas storage amount.
Specifically, as shown in fig. 1 and 5, a detection information processing method includes a first working condition intervention step 100, a second integral diagnosis step 200; the first condition intervention step 100 comprises a first initialization step 111, a first lean intervention step 122; the first initialization step 111 acquires current operating condition information 001, and if the current operating condition information 001 meets a preset diagnosis enabling condition 003, the first lean intervention step 122 adjusts the air-fuel ratio lambda to X.
Further, the second integration diagnosis step 200 includes a second master integration step 211, a second slave integration step 222; the second main integration step 211 acquires a second detection value 002 of the second sensor 911; the second detection value 002 is the magnitude of the physical quantity detected by the second sensor 911; if second detected value 002 decays over time t, 810, from first threshold value u1, 821, to second threshold value u2, 822, a second main integral is performed on second detected value 002 over a time interval between the time interval when first threshold value u1, 821, and the time interval when second threshold value u2, 822 is obtained, and the value of the second main integral is denoted as S1, 8R1; repeating the second integral diagnosis step 200 to obtain a second value of the slave integral and recording as S2, i.e. 8R2; wherein the second slave integral and the second master integral adopt the same processing procedure or integral variable.
Specifically, the second sensor 911 may be a post-oxygen sensor, and the second detection value 002 may be a post-oxygen voltage u820; the first enleanment intervention step 122 enleans the intake passage 920 to the point where the internal combustion engine 930 enters the concentration of the in-cylinder mixture and keeps for a preset time; the current working condition information 001 comprises at least one of exhaust flow, engine speed, temperature at the rear oxygen sensor, voltage of the rear oxygen sensor and air-fuel ratio information.
Further, the method embodiment of the present invention further includes a third synchronization processing step 300; the third synchronization processing step 300 further includes a third flow integration step 311 and a third frequency refresh step 322; the third flow integration step 311 obtains a third flow integral of the exhaust gas, which begins synchronously at the start time 881 of the second main integral.
And if the value of the third oxygen flow integral reaches a third oxygen flow threshold value max, ending the third oxygen flow integral, and marking the number m of the third oxygen flow integral as 1.
Specifically, if the diagnosis enable condition 003 is valid, the third flow integration step 311 is executed again, the third flow integration step 311 is ended in the same manner, and the number m of third flow integrations is increased by 1; the second integral diagnostic step 200 is used for diagnosing that the oxygen sensor voltage is reacting slowly from rich to lean.
If the value S1 of the second master integral, i.e. 8R1, and the value S2 of the second slave integral, i.e. the preset third statistical value of 8R2, are less than or equal to the third integral threshold Smax, i.e. 333; the diagnosis is completed and the voltage response of the post-oxygen sensor 911 is normal; otherwise, a fault signal 666 is output.
Further, the detection information processing method of the present embodiment further includes a fourth conversion output step 400; the fourth conversion output step 400 may further include a fourth table look-up conversion step 411 and a fourth parameter correction step 422; a fourth table look-up conversion step 411, according to a preset integral/time conversion table 500, converts the second integral data 888 obtained in the second integral diagnosis step 200 into fourth response time data 555 by a table look-up method, and a fourth parameter correction step 422 updates the monitoring frequency IUPR, that is, 401, so that the monitoring frequency IUPR is increased by 1; the third synchronization process step 300 outputs fourth response time data 555 to the catalyst diagnostic module to modify the catalyst parameters.
On the other hand, as shown in fig. 11 to 15, the embodiment of the apparatus of the present invention includes a first condition intervention unit 510, a second integral diagnosis unit 520; the first operating condition intervention unit 510 comprises a first initialization unit 511 and a first lean reduction intervention unit 512; the first initialization unit 511 acquires current working condition information 001, and if the current working condition information 001 meets a preset diagnosis enabling condition 003, the first lean reduction intervening unit 512 adjusts the air-fuel ratio lambda to X; the second integral diagnosis unit 520 comprises a second main integration unit 521 and a second slave integration unit 522; the second main integration unit 521 acquires a second detection value 002 of the second sensor 911; the second detection value 002 is a magnitude of the physical quantity detected by the second sensor 911.
If the second detection value 002 decays from the first threshold value u1, i.e. 821, to the second threshold value u2, i.e. 822, with time t, i.e. 810, a second main integral is performed on the second detection value 002 during the time interval between the acquisition of the first threshold value u1, i.e. 821, and the acquisition of the second threshold value u2, i.e. 822, and the value of the second main integral is denoted as S1, i.e. 8R1; the second integral diagnostic unit 520 also derives a second value from the integral and is noted as S2, i.e. 8R2; wherein the second slave integral and the second master integral adopt the same processing procedure or integral variable.
Wherein: the second sensor 911 is a post-oxygen sensor, and the second detection value 002 is a post-oxygen voltage u, i.e., 820; the first lean-decrease intervening unit 512 reduces the concentration of the mixed intake air from the intake passage 920 to the internal combustion engine 930 entering the cylinder for a preset time; the current operating condition information 001 includes at least one of exhaust flow, engine speed, temperature at the rear oxygen sensor, rear oxygen sensor voltage, and air-fuel ratio information.
Further, the detection information processing apparatus of the present invention further includes a third synchronization processing unit 530; the third synchronous processing unit 530 includes a third flow integration unit 531, a third frequency refresh unit 532; the third flow integration unit 531 obtains a third oxygen flow integral of the exhaust gas, which begins synchronously at the start time 881 of the second main integral.
And if the value of the third oxygen flow integral reaches a third oxygen flow threshold value max, ending the third oxygen flow integral, and marking the times m of the third oxygen flow integral as 1.
Specifically, if the diagnosis enable condition 003 is valid, the third flow rate integration unit 531 ends the integration process in the same manner, and increases the number of times m of the third flow rate integration by 1; the second integral diagnostic unit 520 is used for diagnosing that the oxygen sensor voltage is slowly reacting from rich to lean.
If the value S1 of the second master integral, namely the value S2 of the second slave integral, namely the preset third statistical value of 8R2 is less than or equal to a third integral threshold Smax, namely 333, the diagnosis is finished, and the voltage response of the post-oxygen sensor 911 is normal; otherwise, a fault signal 666 is output.
Further, the embodiment of the apparatus of the present invention further includes a fourth conversion output unit 400; the fourth conversion output unit 400 may further include a fourth lookup table conversion unit 541 and a fourth parameter modification unit 542; a fourth lookup conversion unit 541 converts second integral data 888 obtained in the second integral diagnosis unit 520 into fourth response time data 555 by a lookup method according to a preset integral/time conversion table 500, and a fourth parameter correction unit 542 updates the monitoring frequency IUPR, that is, 401, so that the monitoring frequency IUPR401 is increased by 1; the third synchronization processing unit 530 outputs the fourth response time data 555 to the catalyst diagnostic module to correct the parameter of the catalyst.
As shown in fig. 16-19, an article of manufacture embodiment of the present invention may further comprise computer storage media 903, sensor 901, and EMS system 907; the storage medium 903 thereof includes a storage medium body for storing a computer program; the computer program, when executed by the microprocessor, may implement any of the detection information processing methods disclosed in the above embodiments; the sensor in EMS system also uses the above method and device as basis to realize the relevant detection information processing process.
It should be noted that the above examples are only for clearly illustrating the technical solutions of the present invention, and those skilled in the art will understand that the embodiments of the present invention are not limited to the above contents, and obvious changes, substitutions or replacements can be made based on the above contents without departing from the scope covered by the technical solutions of the present invention; other embodiments will fall within the scope of the invention without departing from the inventive concept.
Claims (13)
1. A detection information processing method, comprising: a first working condition intervention step (100), a second integral diagnosis step (200);
the first operating condition intervention step (100) comprises a first initialization step (111), a first lean-reducing intervention step (122); the first initialization step (111) acquires current working condition information (001), and if the current working condition information (001) meets a preset diagnosis enabling condition (003), the first lean reduction intervention step (122) adjusts an air-fuel ratio lambda to X;
the second integration diagnosis step (200) comprises a second master integration step (211) and a second slave integration step (222); -said second main integration step (211) acquires a second detection value (002) of a second sensor (911); the second detection value (002) is a magnitude of the physical quantity detected by the second sensor (911); if the second detection value (002) decays from a first threshold value u1 (821) to a second threshold value u2 (822) over time t (810), a second main integral is performed on the second detection value (002) in a time interval during which the first threshold value u1 (821) and the second threshold value u2 (822) are obtained, and the value of the second main integral is recorded as S1 (8R 1);
repeating said second integral diagnostic step (200) to obtain a second value of the slave integral and recording it as S2 (8R 2); wherein the second slave integral and the second master integral adopt the same processing procedure or integral variable.
2. The detection information processing method according to claim 1, wherein:
the second sensor (911) is a post-oxygen sensor, and the second detection value (002) is a post-oxygen voltage u (820);
-said first enleanment intervention step (122) enleanment of the inlet channel (920) to a concentration of the mixed inlet air entering the cylinder of the internal combustion engine (930) and for a preset time;
the current working condition information (001) comprises at least one of exhaust flow, engine speed, temperature at the rear oxygen sensor, voltage at the rear oxygen sensor and air-fuel ratio information.
3. The detection information processing method according to claim 2, further comprising a third synchronization processing step (300);
said third synchronization processing step (300) comprising a third flow integration step (311), a third frequency refresh step (322);
a third flow integral of the exhaust gas is obtained in the third flow integral step (311), and the third flow integral is started synchronously at the starting time (881) of the second main integral;
and if the value of the third oxygen flow integral reaches a third oxygen flow threshold value max, ending the third oxygen flow integral, and marking the number m of the third oxygen flow integral as 1.
4. The detection information processing method of claim 3, wherein:
if the diagnosis enabling condition (003) is valid, executing the third flow integrating step (311) again, ending the third flow integrating step (311) in the same way, and increasing the number m of the third flow integrating by 1;
the second integral diagnosis step (200) is used for diagnosing that the oxygen sensor voltage slowly reacts from rich to lean, if a preset third statistical value of a second main integral value S1 (8R 1) and a second slave integral value S2 (8R 2) is smaller than or equal to a third integral threshold value Smax (333), the diagnosis is finished, and the voltage response of a post-oxygen sensor (911) is normal; otherwise, a fault indication signal is output (666).
5. The detection information processing method according to any one of claims 1, 2, 3, or 4, further comprising a fourth conversion output step (400);
the fourth conversion output step (400) comprises a fourth table look-up conversion step (411) and a fourth parameter correction step (422);
the fourth table look-up conversion step (411) converts the second integral data (888) obtained in the second integral diagnosis step (200) into fourth response time data (555) by a table look-up method according to a preset integral/time conversion table (500), and the fourth parameter correction step (422) updates the monitoring frequency IUPR (401) to increase the monitoring frequency IUPR (401) by 1;
the third synchronization process step (300) outputs the fourth response time data (555) to a catalyst diagnostic module that modifies a parameter of the catalyst.
6. A detection information processing apparatus comprising: a first working condition intervening unit (510) and a second integral diagnosis unit (520); wherein, the first and the second end of the pipe are connected with each other,
the first working condition intervention unit (510) comprises a first initialization unit (511) and a first lean reduction intervention unit (512); the first initialization unit (511) acquires current working condition information (001), and if the current working condition information (001) meets a preset diagnosis enabling condition (003), the first lean reduction intervention unit (512) adjusts an air-fuel ratio lambda to X;
the second integral diagnosis unit (520) comprises a second main integral unit (521) and a second slave integral unit (522); a second main integration unit (521) acquires a second detection value (002) of a second sensor (911); the second detection value (002) is a magnitude of the physical quantity detected by the second sensor (911); -if the second detection value (002) decays from a first threshold value u1 (821) to a second threshold value u2 (822) over time t (810), performing a second main integral of the second detection value (002) over a time interval during which the first threshold value u1 (821) and the second threshold value u2 (822) are obtained, the value of the second main integral being denoted as S1 (8R 1);
the second integral diagnosis unit (520) also obtains a second value of the slave integral and records the second value as S2 (8R 2); wherein the second slave integral and the second master integral adopt the same processing process or integral variable.
7. The detection information processing apparatus of claim 6, wherein:
the second sensor (911) is a post-oxygen sensor, and the second detection value (002) is a post-oxygen voltage u (820);
the first lean-reduction intervening unit (512) reduces the concentration of the intake passage (920) to the point that the internal combustion engine (930) enters the cylinder and keeps the concentration for a preset time;
the current working condition information (001) comprises at least one of exhaust flow, engine speed, temperature at the rear oxygen sensor, voltage at the rear oxygen sensor and air-fuel ratio information.
8. The detection information processing apparatus of claim 7, further comprising a third synchronization processing unit (530);
the third synchronous processing unit (530) comprises a third flow integrating unit (531), a third frequency refreshing unit (532);
the third flow integration unit (531) acquires a third flow integration of the exhaust gas, and the third flow integration starts from the starting time (881) of the second main integration synchronously;
and if the value of the third oxygen flow integral reaches a third oxygen flow threshold value max, ending the third oxygen flow integral, and marking the number m of the third oxygen flow integral as 1.
9. The detection information processing apparatus according to claim 8, wherein:
if the diagnosis enabling condition (003) is valid, the third flow integrating unit (531) ends the integration process in the same way, and increases the number m of the third oxygen flow integration by 1;
the second integral diagnosis unit (520) is used for diagnosing that the oxygen sensor voltage slowly reacts from rich to lean, if a preset third statistical value of a value S1 (8R 1) of the second main integral and a value S2 (8R 2) of the second slave integral is smaller than or equal to a third integral threshold value Smax (333), the diagnosis is finished, and the voltage response of the post-oxygen sensor (911) is normal; otherwise, a fault indication signal is output (666).
10. The detection information processing apparatus according to any one of claims 6, 7, 8, or 9, further comprising a fourth conversion output unit (400);
the fourth conversion output unit (400) comprises a fourth table look-up conversion unit (541) and a fourth parameter correction unit (542);
the fourth look-up table conversion unit (541) converts the second integral data (888) obtained in the second integral diagnosis unit (520) into fourth response time data (555) by a look-up table method according to a preset integral/time conversion table (500), and the fourth parameter correction unit (542) updates the monitoring frequency IUPR (401) so as to increase 1 to the monitoring frequency IUPR (401);
the third synchronization processing unit (530) outputs the fourth response time data (555) to a catalyst diagnostic module that modifies a parameter of the catalyst.
11. A computer storage medium comprising a storage medium body for storing a computer program; the computer program, when executed by a microprocessor, implements the detection information processing method according to any one of claims 1 to 5.
12. A sensor comprising the detection information processing apparatus according to any one of claims 6 to 10; and/or a storage medium according to any one of claim 11.
13. An EMS system comprising the detection information processing apparatus according to any one of claims 6 to 10; and/or the storage medium of any of claim 11; and/or a sensor according to any of claims 12.
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