Monitoring and recording of extreme exhaust methods, systems, and vehicles.

Abstract

This invention discloses a method, system, and vehicle for monitoring and recording extreme exhaust temperatures of a vehicle, comprising the following steps: dividing the vehicle's exhaust temperature into multiple over-temperature zones according to severity; monitoring the vehicle's exhaust temperature in real time during vehicle operation; and, in response to the detection of the vehicle's exhaust temperature in any of the over-temperature zones, assuming an abnormality in the vehicle's exhaust temperature and recording the abnormal information in a non-erasable area of ​​the controller, wherein the abnormal information includes at least one of the following: maximum exhaust temperature, over-temperature duration, and number of over-temperature occurrences. When an abnormal exhaust temperature occurs during vehicle operation, this invention can immediately monitor and identify it and record the abnormality in the non-erasable area of ​​the controller, allowing technicians to review the vehicle's exhaust temperature status at any time.

Description

Technical Field

[0001] This invention relates to the field of extreme vehicle exhaust temperature technology, specifically to a method, system, and vehicle for monitoring and recording extreme vehicle exhaust temperatures. Background Technology

[0002] Currently, the verification of vehicle exhaust temperature calibration (detecting whether the vehicle's exhaust temperature is within the allowable temperature range of exhaust system components) is primarily achieved through external devices. The data recorded by these external devices is used to determine if extreme anomalies exist in the vehicle's exhaust temperature. Current control systems lack monitoring strategies specifically for extreme anomalies in exhaust temperature. However, monitoring the entire vehicle's exhaust temperature through external devices presents two problems. First, the limited number of vehicles that can be monitored due to the limited number of external devices results in insufficient sample size, hindering thorough verification of exhaust temperature calibration. Second, the data collected by external devices covers the entire driving process, without distinguishing between extreme anomalies, leading to large data volumes, analysis difficulties, and a lack of clarity. The conventional solution to this problem is to increase the number of external devices and optimize their monitoring capabilities, but this is relatively costly and time-consuming.

[0003] Therefore, it is necessary to develop a method, system, and vehicle for monitoring and recording extreme exhaust temperatures of the entire vehicle. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, and vehicle for monitoring and recording extreme exhaust temperatures of a vehicle. When an abnormal exhaust temperature occurs during vehicle operation, the system can immediately monitor and identify the abnormality and record it in the non-erasable area of ​​the controller, so that technicians can check the exhaust temperature status of the vehicle at any time.

[0005] In a first aspect, the present invention provides a method for monitoring and recording extreme exhaust temperatures of a vehicle, comprising the following steps:

[0006] The vehicle's exhaust temperature was divided into multiple over-temperature zones according to the severity of the over-temperature.

[0007] During vehicle operation, the exhaust temperature of the vehicle is monitored in real time.

[0008] When the vehicle exhaust temperature is detected to be above any of the above-temperature ranges, the vehicle exhaust temperature is considered abnormal, and the abnormal information is recorded in the non-erasable area of ​​the controller. The abnormal information includes at least one of the following: maximum exhaust temperature, duration of above-temperature, and number of times above-temperature occurs.

[0009] Optionally, the overheating range of the vehicle's exhaust temperature can be divided into a mild overheating range, a severe overheating range, and a high-hazard overheating range.

[0010] Optionally, when the monitored exhaust temperature of the vehicle is greater than the threshold A for entering the mild overheating zone but less than the threshold C for entering the severe overheating zone, it is determined that the exhaust temperature of the vehicle has entered the mild overheating zone; wherein, the threshold A for entering the mild overheating zone is less than the threshold C for entering the severe overheating zone.

[0011] When the monitored exhaust temperature of the vehicle is lower than the exit threshold B of the slightly overheated range, it is determined that the exhaust temperature has exited the slightly overheated range. The exit threshold B of the slightly overheated range is less than the entry threshold A of the slightly overheated range.

[0012] Optionally, when the monitored exhaust temperature of the vehicle is greater than or equal to the threshold C for entering the severe overheating zone and less than the threshold E for entering the high-hazard overheating zone, it is determined that the exhaust temperature of the vehicle has entered the severe overheating zone; wherein, the threshold C for entering the severe overheating zone is less than the threshold E for entering the high-hazard overheating zone.

[0013] When the monitored exhaust temperature of the vehicle is lower than the severe overheating exit threshold D, it is determined that the exhaust temperature has exited the severe overheating range; where the severe overheating exit threshold D is less than the severe overheating range entry threshold C.

[0014] Optionally, when the monitored exhaust temperature of the vehicle is greater than or equal to the threshold E of the high-hazard overheating range, it is determined that the exhaust temperature of the vehicle has entered the high-hazard overheating range.

[0015] When the catalytic discharge temperature is monitored to be lower than the exit threshold F of the high-hazard overheating zone, it is determined that the catalytic discharge temperature has exited the high-hazard overheating zone; wherein, the exit threshold F of the high-hazard overheating zone is less than the entry threshold E of the high-hazard overheating zone.

[0016] Optionally, the method for calculating the maximum exhaust temperature is as follows:

[0017] When the vehicle's exhaust temperature is detected to be greater than or equal to the threshold E of the high-hazard overheating zone, the current exhaust temperature will be compared with the exhaust temperature of the previous collection cycle in real time. The larger of the two will be taken as the highest exhaust temperature, and the recorded highest exhaust temperature will be used as the highest exhaust temperature of the current high-hazard overheating zone.

[0018] Optionally, the method for calculating the overheating duration is as follows:

[0019] When the vehicle's exhaust temperature is detected to be greater than or equal to either the severe over-temperature zone entry threshold C or the high-hazard over-temperature zone entry threshold E, the over-temperature duration timer starts counting.

[0020] Set the time scale and set the over-temperature timer + time scale to accumulate over-temperature duration;

[0021] Whenever the over-temperature timer exceeds the accumulated over-temperature duration, the over-temperature duration counter increments by 1, and the over-temperature duration counter multiplied by the time scale equals the over-temperature duration.

[0022] Meanwhile, when the catalytic discharge temperature is lower than the exit temperature threshold of the corresponding range, the cumulative over-temperature duration is reset to zero.

[0023] Optionally, the number of overheating cycles is calculated as follows:

[0024] When the monitored vehicle exhaust temperature is greater than or equal to any of the following thresholds: mild over-temperature zone A, severe over-temperature zone C, and high-hazard over-temperature zone E, the over-temperature duration timer starts counting.

[0025] When the duration of overheating exceeds the set time threshold for the corresponding interval, the overheating count counter increments by 1;

[0026] Meanwhile, when the catalytic discharge temperature is lower than the exit temperature threshold of the corresponding range, the cumulative over-temperature duration is reset to zero.

[0027] Secondly, the present invention provides a vehicle extreme exhaust temperature monitoring and recording system, comprising a controller and a memory, wherein the memory stores a computer-readable program, and when the computer-readable program is invoked by the controller, it can execute the steps of the vehicle extreme exhaust temperature monitoring and recording method as described in the present invention.

[0028] Thirdly, the vehicle described in this invention employs a vehicle extreme exhaust temperature monitoring and recording system as described in this invention.

[0029] This invention has the following advantages: When an abnormal exhaust temperature occurs during vehicle operation, this invention can immediately monitor and identify it, recording the anomaly in the controller's non-erasable area. This allows technicians to review the vehicle's exhaust temperature status at any time and determine whether adjustments to the vehicle's exhaust temperature control parameters are necessary. Based on the temperature characteristics of exhaust system components, this invention divides the vehicle's exhaust temperature overheating range into mild overheating, severe overheating, and high-hazard overheating ranges. It also identifies three major factors that cause damage to exhaust system components (excessive exhaust temperature, duration of overheating, and number of overheating events). In the mild overheating range, exhaust system components are damaged only after prolonged exposure to this range; therefore, the primary focus is on monitoring the number of overheating events that will damage the components. In the severe overheating range, exhaust system components are damaged within a short time; therefore, the primary focus is on monitoring the duration and number of overheating events. In the high-hazard overheating range, the exhaust temperature has reached the limits of the exhaust system components, causing significant damage; therefore, it is necessary to monitor the duration, number of overheating events, and the highest exhaust temperature. The vehicle extreme exhaust temperature monitoring and recording function is mainly designed into three parts, including exhaust temperature overheating degree judgment, exhaust temperature abnormality factor calculation and abnormal factor recording. This invention solves the problems of high development cost and long development cycle caused by conventional solutions. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a general schematic diagram of the overall scheme of this embodiment;

[0032] Figure 2 This is a schematic diagram of the overheating degree determination process in this embodiment;

[0033] Figure 3 This is a schematic diagram of the abnormal factor calculation process in this embodiment;

[0034] Figure 4 This is a schematic diagram of the abnormal factor recording process in this embodiment;

[0035] Figure 5 This is a schematic diagram of the specific process of this embodiment. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings.

[0037] In this embodiment, a method for monitoring and recording extreme exhaust temperatures of a vehicle includes the following steps:

[0038] The vehicle's exhaust temperature was divided into multiple over-temperature zones according to the severity of the over-temperature.

[0039] During vehicle operation, the exhaust temperature of the vehicle is monitored in real time.

[0040] When the vehicle exhaust temperature is detected to be above any of the above-temperature ranges, the vehicle exhaust temperature is considered abnormal, and the abnormal information is recorded in the non-erasable area of ​​the controller. The abnormal information includes at least one of the following: maximum exhaust temperature, duration of above-temperature, and number of times above-temperature occurs.

[0041] In this embodiment, software control is used to monitor the vehicle's exhaust temperature in real time. When an extreme exhaust temperature is detected, it is immediately recorded in the non-erasable area of ​​the controller, allowing technicians to retrieve the relevant extreme exhaust temperature information at any time. Specifically:

[0042] like Figure 1 As shown, in this embodiment, the overall framework of the vehicle extreme exhaust temperature monitoring and recording function is as follows:

[0043] 1. The input boundary for the vehicle extreme exhaust temperature monitoring and recording function is the catalytic exhaust temperature calculated by the control system through the temperature model.

[0044] 2. The main logic of the vehicle extreme exhaust temperature monitoring and recording function is divided into three parts:

[0045] The first part is the over-temperature degree discrimination: Different over-temperature degrees cause different damages to the components of the exhaust system. To accurately identify and record the hazards caused by the exhaust temperature to the components, the exhaust temperature over-temperature area is subdivided into a mild over-temperature range, a severe over-temperature range, and a high-hazard over-temperature range.

[0046] The second part is the calculation of abnormal factors: According to the temperature characteristics of the components, there are three key factors for the exhaust temperature to cause damage to the components of the exhaust system, including the highest exhaust temperature, the exhaust temperature over-temperature time, and the number of over-temperature times.

[0047] The third part is the recording of abnormal factors: To ensure that the exhaust temperature abnormal factors recorded by the control system are not lost after power-off, the exhaust temperature abnormal factors recorded by the control system are written into the non-erasable area of the controller.

[0048] 3. The output boundary of the vehicle extreme exhaust temperature monitoring and recording function is the exhaust temperature abnormal information written by the control system into the non-erasable area. Technicians can read the exhaust temperature abnormal situation during vehicle use at any time and judge whether it is necessary to adjust the vehicle exhaust temperature control parameters according to this situation.

[0049] In this embodiment, for the over-temperature degree discrimination:

[0050] The control system identifies whether the current vehicle exhaust temperature exceeds the normal range according to the logic. If the exhaust temperature exceeds the normal range, the control system will identify which of the three over-temperature ranges (mild over-temperature range, severe over-temperature range, high-hazard over-temperature range) the exhaust temperature is in. This part of the control logic is executed according to the Figure 2 shown process, specifically as follows:

[0051] 1. Mild over-temperature range discrimination: The control system monitors that the exhaust temperature in the vehicle's catalytic converter is greater than the entry threshold A of the mild over-temperature range and less than the entry threshold C of the severe over-temperature range (where A < C). At this time, the control system determines that the exhaust temperature in the catalytic converter enters the mild over-temperature range. When the exhaust temperature in the catalytic converter is lower than the exit threshold B of the mild over-temperature range (where B < A), the control system determines that the exhaust temperature in the catalytic converter exits the mild over-temperature range.

[0052] 2. Severe over-temperature range discrimination: The control system monitors that the exhaust temperature in the catalytic converter is greater than or equal to the entry threshold C of the severe over-temperature range and less than the entry threshold E of the high-hazard over-temperature range (where C < E). The system determines that the exhaust temperature in the catalytic converter enters the severe over-temperature range. Until the exhaust temperature in the catalytic converter is lower than the exit threshold D of the severe over-temperature range (where D < C), the system determines that the exhaust temperature in the catalytic converter exits the severe over-temperature range.

[0053] 3. Discrimination of high-hazard over-temperature range: When the control system monitors that the temperature of the middle exhaust of the catalyst is greater than or equal to the entry threshold E of the high-hazard over-temperature range, it is determined that the temperature of the middle exhaust of the catalyst enters the high-hazard over-temperature range; when the temperature of the middle exhaust of the catalyst is lower than the exit threshold F of the high-hazard over-temperature range (where F < E), the control system determines that the temperature of the middle exhaust of the catalyst exits the high-hazard over-temperature range.

[0054] In this embodiment, for the calculation of abnormal factors: After the control system completes the identification of the over-temperature range, the control system will calculate the three key factors of exhaust temperature abnormality (the highest exhaust temperature, the number of over-temperatures, and the over-temperature duration) according to this part of the logic. In the mild over-temperature range, the exhaust system components will be damaged only when they are in this mild over-temperature range for a long time, so the main monitoring is the number of over-temperatures that will damage the components; in the severe over-temperature range, the exhaust system components will be damaged in a short time, and the main monitoring is the over-temperature duration and the number of over-temperatures; in the high-hazard over-temperature range, the exhaust temperature has reached the limit of the exhaust system components and will cause great damage to the components, so it is necessary to monitor the over-temperature duration, the number of over-temperatures, and the highest exhaust temperature. This part of the operation logic is executed according to Figure 3 the logic shown below, specifically:

[0055] Highest exhaust temperature: When the control system monitors that the temperature of the middle exhaust of the vehicle catalyst is greater than or equal to the entry threshold E of the high-hazard over-temperature range, it will monitor and compare the current temperature of the middle exhaust of the catalyst with the temperature of the middle exhaust of the catalyst in the previous acquisition cycle in real time, and take the larger of the two as the highest exhaust temperature, and record the highest exhaust temperature as the highest exhaust temperature in this high-hazard over-temperature range.

[0056] Over-temperature duration: When the control system monitors that the temperature of the middle exhaust of the vehicle catalyst is greater than or equal to either the entry threshold C of the severe over-temperature range or the entry threshold E of the high-hazard over-temperature range, the over-temperature duration timer starts timing; set the time scale (calibratable), and set the over-temperature timing + the time scale as the cumulative over-temperature duration timing; whenever the over-temperature timing is greater than the cumulative over-temperature duration timing, the count of the over-temperature duration counter +1, and the count of the over-temperature duration counter multiplied by the time scale is equal to the over-temperature duration; at the same time, when the temperature of the middle exhaust of the catalyst is lower than the exit temperature threshold of the corresponding range, the cumulative over-temperature duration timing for this time is cleared.

[0057] Number of over-temperatures: When it is monitored that the temperature of the middle exhaust of the vehicle catalyst is greater than or equal to any one of the entry threshold A of the mild over-temperature range, the entry threshold C of the severe over-temperature range, and the entry threshold E of the high-hazard over-temperature range, the over-temperature duration timer starts timing; when the over-temperature duration is greater than the set time threshold of the corresponding range, the count of the over-temperature number counter +1; at the same time, when the temperature of the middle exhaust of the catalyst is lower than the exit temperature threshold of the corresponding range, the cumulative over-temperature duration timing for this time is cleared.

[0058] In this embodiment, abnormal factor recording: The control system records the monitored abnormal exhaust temperatures (including the highest exhaust temperature, duration of over-temperature, and number of over-temperature occurrences recorded in the mild over-temperature range, severe over-temperature range, and high-hazard over-temperature range) and writes them into the non-erasable area of ​​the controller. This part of the control logic follows... Figure 4 The logic shown is executed.

[0059] like Figure 5 As shown, in this embodiment, the specific logic of the vehicle extreme exhaust temperature monitoring and recording function is as follows:

[0060] 1. When the control system detects that the catalytic discharge temperature is in the slightly over-temperature range (C > catalytic discharge temperature > A), the over-temperature duration counter starts counting. When the over-temperature duration exceeds the time threshold T1, the slightly over-temperature count counter Z1 is incremented by 1. The slightly over-temperature count counter Z1 is written to the controller's non-erasable area. When the control system detects that the catalytic discharge temperature is below the slightly over-temperature range exit threshold B, the over-temperature duration counter is reset to zero.

[0061] 2. When the control system detects that the catalytic discharge temperature is in the severe over-temperature range (E>catalytic discharge temperature≥C), the over-temperature duration counter starts counting. When the over-temperature duration exceeds the time threshold T2, the severe over-temperature count counter Z2+1 is incremented.

[0062] 3. When the over-temperature duration exceeds the cumulative over-temperature duration T4 (T4 = over-temperature duration + time threshold T3), the over-temperature duration counter Z3 is incremented by 1, and the severe over-temperature count counter Z2 and over-temperature duration counter Z3 are written to the controller's non-erasable area. When the control system monitors that the catalytic discharge temperature is less than the severe over-temperature exit threshold D, the over-temperature duration and the cumulative over-temperature duration T4 are reset to zero.

[0063] 4. When the control system detects that the catalytic discharge temperature is in the high-hazard over-temperature range (catalytic discharge temperature ≥ E), the over-temperature duration counter starts counting. When the over-temperature duration exceeds the time threshold T5, the high-hazard over-temperature count counter Z4 increments by 1. When the over-temperature duration exceeds the cumulative over-temperature duration T7 (T7 = over-temperature duration + T6), the over-temperature duration counter Z5 increments by 1. Simultaneously, the control system compares the current catalytic discharge temperature with the temperature collected in the previous cycle, taking the larger one as the highest discharge temperature. The high-hazard over-temperature count counter Z4, the over-temperature duration counter Z5, and the highest discharge temperature are written to the controller's non-erasable area. When the control system detects that the catalytic discharge temperature is below the high-hazard over-temperature range exit threshold F, the over-temperature duration and the cumulative over-temperature duration T7 are reset to zero.

[0064] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for monitoring a record extreme exhaust temperature of a vehicle, characterized in that, The method comprises the following steps: The vehicle's middle temperature exhaust temperature is divided into a plurality of temperature intervals according to the severity; During the operation of the vehicle, the middle temperature exhaust temperature of the vehicle is monitored in real time; When the middle temperature exhaust temperature of the vehicle is monitored in any of the temperature intervals, it is considered that the exhaust temperature of the vehicle is abnormal, and the abnormal information is recorded in the non-erasable area of the controller, wherein the abnormal information includes the highest exhaust temperature, the over-temperature time length and the over-temperature frequency; The over-temperature intervals of the middle temperature exhaust temperature of the vehicle are divided into a mild over-temperature interval, a serious over-temperature interval and a high-hazard over-temperature interval; when the middle temperature exhaust temperature of the vehicle is monitored to be greater than the mild over-temperature interval entering threshold A and less than the serious over-temperature interval entering threshold C, it is judged that the middle temperature exhaust temperature enters the mild over-temperature interval; wherein the mild over-temperature interval entering threshold A is less than the serious over-temperature interval entering threshold C; When the middle temperature exhaust temperature of the vehicle is monitored to be less than the mild over-temperature interval exit threshold B, it is judged that the middle temperature exhaust temperature exits the mild over-temperature interval, wherein the mild over-temperature interval exit threshold B is less than the mild over-temperature interval entering threshold A; when the middle temperature exhaust temperature of the vehicle is monitored to be greater than or equal to the serious over-temperature interval entering threshold C and less than the high-hazard over-temperature interval entering threshold E, it is judged that the middle temperature exhaust temperature enters the serious over-temperature interval; wherein the serious over-temperature interval entering threshold C is less than the high-hazard over-temperature interval entering threshold E; When the middle temperature exhaust temperature of the vehicle is monitored to be less than the serious over-temperature exit threshold D, it is judged that the middle temperature exhaust temperature exits the serious over-temperature interval; wherein the serious over-temperature exit threshold D is less than the serious over-temperature interval entering threshold C; When the middle temperature exhaust temperature of the vehicle is monitored to be greater than or equal to the high-hazard over-temperature interval entering threshold E, it is judged that the middle temperature exhaust temperature enters the high-hazard over-temperature interval; When the middle temperature exhaust temperature of the vehicle is monitored to be less than the high-hazard over-temperature interval exit threshold F, it is judged that the middle temperature exhaust temperature exits the high-hazard over-temperature interval; wherein the high-hazard over-temperature interval exit threshold F is less than the high-hazard over-temperature interval entering threshold E.

2. The method of claim 1, wherein: The calculation method of the highest exhaust temperature is as follows: When the middle temperature exhaust temperature of the vehicle is monitored to be greater than or equal to the high-hazard over-temperature interval entering threshold E, the current middle temperature exhaust temperature is compared with the middle temperature exhaust temperature of the last collection period in real time, and the larger one is taken as the highest exhaust temperature; the recorded highest exhaust temperature is taken as the highest exhaust temperature of the high-hazard over-temperature interval.

3. The method of claim 2, wherein: The calculation method of the over-temperature time length is as follows: When the middle temperature exhaust temperature of the vehicle is monitored to be greater than or equal to any of the serious over-temperature interval entering threshold C and the high-hazard over-temperature interval entering threshold E, the over-temperature time length timer starts timing; The time scale is set, and the over-temperature timing + time scale is set as the over-temperature time length cumulative timing; Whenever the over-temperature timing is greater than the over-temperature time length cumulative timing, the count of the over-temperature time length counter is +1, and the count of the over-temperature time length counter multiplied by the time scale is equal to the over-temperature time length; At the same time, when the middle temperature exhaust temperature is less than the exit temperature threshold of the corresponding interval, the over-temperature time length cumulative timing is cleared.

4. The method of claim 3, wherein: The calculation method of the over-temperature frequency is as follows: When the middle temperature exhaust temperature of the vehicle is monitored to be greater than or equal to any of the mild over-temperature interval entering threshold A, the serious over-temperature interval entering threshold C and the high-hazard over-temperature interval entering threshold E, the over-temperature time length timer starts timing; When the over-temperature time length is greater than the set time threshold of the corresponding interval, the count of the over-temperature frequency counter is +1; Meanwhile, when the catalytic temperature is lower than the exit temperature threshold value corresponding to the interval, the current over-temperature duration accumulation timer is cleared.

5. A monitoring and recording extreme exhaust temperature system for a vehicle, comprising: The monitoring and recording method comprises a controller and a memory, and the memory stores a computer readable program which, when called by the controller, can execute the steps of the monitoring and recording method of the extreme exhaust temperature of the whole vehicle according to any one of claims 1 to 4.

6. A vehicle characterized by: The monitoring and recording system for the extreme exhaust temperature of the whole vehicle is adopted.

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