A method, apparatus, vehicle, and storage medium for detecting differential pressure (DPF) sensors.

Abstract

This invention discloses a method, device, vehicle, and storage medium for detecting a DPF differential pressure sensor. The DPF differential pressure sensor detection method includes: during diesel engine operation, acquiring the voltage value of the DPF differential pressure sensor within a calibrated time period, and determining whether the voltage value jumps within the normal operating range or within the DPF overload range; based on the determination of whether the jump is within the normal operating range or within the DPF overload range, determining a first cumulative number of jumps within the normal operating range and a second cumulative number of jumps within the DPF overload range; and determining whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative number of jumps and the second cumulative number of jumps. This invention achieves accurate diagnosis of DPF sensor loose connection conditions under different voltage operating conditions, while avoiding occasional false alarms due to loose connections.

Description

Technical Field

[0001] This invention relates to the field of engine aftertreatment control technology, and in particular to a DPF differential pressure sensor detection method, device, vehicle, and storage medium. Background Technology

[0002] To meet the emission requirements for particulate matter, DPF (diesel particulate filter) has become an essential after-treatment device for China VI and non-China IV diesel vehicles. As a core component for diagnosing DPF performance, the DPF differential pressure sensor has also become an essential component for China VI and non-China IV diesel vehicles.

[0003] From a market perspective, during driving, bumps and vibrations can easily cause poor contact between the ECU (Electronic Control Unit) and the DPF differential pressure sensor wiring harness, leading to a loose connection of the DPF differential pressure sensor, which may falsely trigger regeneration or even falsely report a DPF overload fault, resulting in vehicle torque limitation. This causes problems for aftermarket services and affects the user's driving experience.

[0004] Currently, when a DPF differential pressure sensor signal line is loosely connected, the voltage signal value of the DPF differential pressure sensor is uncertain and does not necessarily reach the open circuit or short circuit voltage threshold. Therefore, it can only diagnose cases where the voltage signal exceeds the voltage threshold, but cannot diagnose loose connections when the voltage signal value is within the normal operating range. Furthermore, existing technology only accumulates the number of times the voltage signal value exceeds the short circuit voltage threshold. If there are occasional, short-term loose connections, the accumulated number will also exceed the limit, potentially leading to false alarms for loose connection faults in the DPF differential pressure sensor. Summary of the Invention

[0005] This invention provides a method, device, vehicle, and storage medium for detecting DPF differential pressure sensors, in order to solve the current problem that it is impossible to diagnose the loose connection of DPF differential pressure sensors when the voltage signal value is within the normal operating range, and that occasional short-term loose connections may cause false alarms of loose connection faults in DPF differential pressure sensors.

[0006] According to one aspect of the present invention, a method for detecting a DPF differential pressure sensor is provided, the method comprising:

[0007] During the operation of the diesel engine, the voltage value of the DPF differential pressure sensor is collected within the calibration time, and it is determined whether the voltage value jumps within the normal operating range or jumps within the DPF overload range.

[0008] Based on the result of determining whether the jump is within the normal operating range or within the DPF overload range, the first cumulative number of jumps within the normal operating range and the second cumulative number of jumps within the DPF overload range are determined respectively.

[0009] Whether to report a DPF differential pressure sensor loose connection fault is determined based on the first cumulative jump count and the second cumulative jump count.

[0010] Optionally, within the normal operating range, the voltage value transitions to a value higher than a first voltage threshold and lower than a second voltage threshold within a calibrated time period.

[0011] Determining whether the voltage value jumps within the normal operating range or within the DPF overload range includes:

[0012] Determine whether any voltage value within the calibration time exceeds the first voltage threshold and falls below the second voltage threshold within the calibration time. If so, the voltage value within the calibration time is considered to be within the normal operating range. If not, determine whether the voltage value within the calibration time is within the DPF overload range.

[0013] Optionally, within the DPF overload range, the voltage value jumps to a third voltage threshold within the calibrated time.

[0014] Determine whether the voltage value changes within the DPF overload range within the calibrated time, including:

[0015] Determine whether any voltage value within the calibration time exceeds the third voltage threshold. If so, the voltage value within the calibration time is considered to have jumped within the DPF overload range. If not, the cumulative voltage value does not jump for a certain period of time.

[0016] Optionally, the DPF differential pressure sensor detection method further includes:

[0017] When the cumulative voltage value does not change for a period of time exceeding the set non-change time threshold, the first cumulative change count and the second cumulative change count are reduced by one respectively.

[0018] Optionally, based on the result of determining whether the transition occurs within the normal operating range or within the DPF overload range, a first cumulative number of transitions within the normal operating range and a second cumulative number of transitions within the DPF overload range are determined, including:

[0019] If the voltage value changes within the normal operating range or within the DPF overload range within the calibrated time period, the first cumulative number of changes within the normal operating range and the second cumulative number of changes within the DPF overload range will be incremented by one, respectively.

[0020] Optionally, determining whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative number of jumps and the second cumulative number of jumps includes:

[0021] If the first cumulative number of jumps is greater than the first jump number threshold, and / or the second cumulative number of jumps is greater than the second jump number threshold, then a DPF differential pressure sensor loose connection fault is reported.

[0022] Optionally, the DPF differential pressure sensor detection method further includes:

[0023] The total reported time of intermittent connection faults in the DPF differential pressure sensor;

[0024] When the intermittent connection fault time exceeds a preset fault time threshold, DPF differential pressure sensor fault diagnosis is allowed.

[0025] When the intermittent connection fault time is less than or equal to the preset fault time threshold, DPF differential pressure sensor fault diagnosis is disabled.

[0026] According to another aspect of the present invention, a DPF differential pressure sensor detection device is provided, the DPF differential pressure sensor detection device comprising:

[0027] The jump judgment module is used to collect the voltage value of the DPF differential pressure sensor within a calibrated time while the diesel engine is running, and to determine whether the voltage value jumps within the normal operating range or jumps within the DPF overload range.

[0028] The jump count determination module is used to determine the first cumulative jump count for jumps within the normal operating range and the second cumulative jump count for jumps within the DPF overload range, based on the result of determining whether the jump is within the normal operating range or within the DPF overload range.

[0029] The fault diagnosis module is used to determine whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative jump count and the second cumulative jump count.

[0030] According to another aspect of the present invention, a vehicle is provided, the vehicle comprising:

[0031] At least one processor; and,

[0032] A memory communicatively connected to the at least one processor; wherein,

[0033] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the DPF differential pressure sensor detection method according to any embodiment of the present invention.

[0034] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the DPF differential pressure sensor detection method according to any embodiment of the present invention.

[0035] The technical solution of this invention involves collecting the voltage value of a DPF differential pressure sensor within a calibrated time period while the diesel engine is running, and determining whether the voltage value fluctuates within the normal operating range or within the DPF overload range. Based on the determination of whether the fluctuation is within the normal operating range or within the DPF overload range, a first cumulative number of fluctuations within the normal operating range and a second cumulative number of fluctuations within the DPF overload range are determined. The first and second cumulative number of fluctuations are used to determine whether a DPF differential pressure sensor loose connection fault should be reported. This invention solves the current problem of being unable to diagnose DPF differential pressure sensor loose connections when the voltage signal value is within the normal operating range, and the problem that occasional short-term loose connections may lead to false alarms of DPF differential pressure sensor loose connection faults. It achieves accurate diagnosis of DPF sensor loose connection conditions for different voltage operating conditions, while avoiding false alarms of occasional loose connection faults.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of a DPF differential pressure sensor detection method according to Embodiment 1 of the present invention;

[0039] Figure 2 This is a flowchart of a DPF differential pressure sensor detection method according to Embodiment 2 of the present invention;

[0040] Figure 3 This is a schematic diagram of a DPF differential pressure sensor detection device according to Embodiment 3 of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of a vehicle implementing the DPF differential pressure sensor detection method of this invention. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] When driving a China VI or non-China IV diesel engine, the DPF differential pressure sensor is prone to loose wiring during bumps or vibrations. When the wiring is not in good contact, the voltage of the DPF differential pressure sensor collected by the ECU will fluctuate (it may be a loose connection or a short circuit to ground). When the collected voltage is high or low, it corresponds to a large or small DPF differential pressure. If the diesel engine is operating under conditions requiring DPF overload or low DPF capture efficiency diagnosis, it will inevitably report a DPF overload or low DPF capture efficiency fault. In this case, the overload or low capture efficiency fault is a false alarm, but the ECU cannot recognize this as a false alarm and still believes that the DPF can no longer capture particulate matter, limiting torque to reduce particulate matter emissions and avoid further environmental pollution. If the user goes to a service station to resolve the DPF overload and torque limiting issues, the service station, with its existing methods, cannot locate the cause, and methods such as soot blowing and DPF regeneration still cannot fundamentally solve the problem. Ultimately, the only solution is to replace the differential pressure sensor.

[0045] Data analysis revealed two distinct characteristics when a DPF differential pressure sensor experiences a loose connection: firstly, while the DPF differential pressure sensor voltage value remains within the normal range, its fluctuation frequency is very high (i.e., higher than the frequency of voltage changes caused by variations in operating conditions); secondly, the DPF differential pressure sensor voltage value sometimes exceeds the DPF overload threshold and sometimes falls below it. Based on these characteristics, this application designs a DPF differential pressure sensor detection method, device, vehicle, and storage medium to address the aforementioned problems.

[0046] Example 1

[0047] Figure 1 This is a flowchart of a DPF differential pressure sensor detection method provided in Embodiment 1 of the present invention. This embodiment is applicable to accurately diagnosing whether a DPF sensor has a loose connection under different voltage operating conditions. This DPF differential pressure sensor detection method can be executed by a DPF differential pressure sensor detection device, which can be implemented in hardware and / or software. This DPF differential pressure sensor detection device can be configured in a vehicle. Figure 1 As shown, the DPF differential pressure sensor detection method includes:

[0048] S110. During the operation of the diesel engine, the voltage value of the DPF differential pressure sensor is collected within the calibration time, and it is determined whether the voltage value jumps within the normal operating range or jumps within the DPF overload range.

[0049] After T15 is powered on, the diesel engine is started and kept running. While the diesel engine is running, the voltage value of the DPF differential pressure sensor is collected within the calibration time. Therefore, before collecting the voltage, it is necessary to confirm that the diesel engine is running. If the diesel engine is not running, T15 is powered on again.

[0050] It is understood that the voltage values ​​collected by the DPF differential pressure sensor within the calibration time are at least two, that is, two or more voltage values ​​are collected within the calibration time. This embodiment does not impose any limit on the number of voltage values ​​collected within the calibration time.

[0051] The DPF (Digital Particulate Filter) is used to capture particulate matter in exhaust gases. When the captured particulate matter reaches a certain level, passive or active regeneration is required to restore the DPF's ability to capture particulate matter. The DPF differential pressure sensor is installed across the DPF to measure the pressure difference. The measured DPF differential pressure can be used to estimate the DPF carbon load. The ECU obtains the DPF differential pressure by acquiring the voltage signal from the DPF differential pressure sensor and converting it according to a specific relationship.

[0052] Specifically, within the normal operating range, the voltage value transitioning to the voltage threshold is higher than the first voltage threshold and lower than the second voltage threshold within the calibrated time; within the DPF overload range, the voltage value transitioning to the voltage threshold is higher than the third voltage threshold within the calibrated time.

[0053] The first voltage threshold, the second voltage threshold, and the third voltage threshold can be selected and set by those skilled in the art in combination with the actual needs of the DPF, and this embodiment does not impose any restrictions on this.

[0054] Determining whether the voltage value changes within the normal operating range within the calibration time involves determining whether any voltage value within the calibration time exceeds the first voltage threshold and falls below the second voltage threshold. If so, the voltage value within the calibration time is considered to have changed within the normal operating range; otherwise, it is determined whether the voltage value within the calibration time changes within the DPF overload range.

[0055] Determining whether the voltage value changes within the normal operating range or the DPF overload range within the calibration time is equivalent to determining whether any voltage value within the calibration time is higher than the third voltage threshold. If so, the voltage value within the calibration time is considered to have changed within the DPF overload range; otherwise, the time during which the voltage value does not change is accumulated.

[0056] Furthermore, when the cumulative voltage value does not change for a period of time exceeding a set non-change time threshold, the first cumulative change count and the second cumulative change count are reduced by one respectively.

[0057] The setting of the non-jumping time threshold can be selected and set by those skilled in the art in combination with the actual needs of the DPF, and this embodiment does not impose any restrictions on this.

[0058] S120. Based on the result of determining whether the jump is within the normal working range or within the DPF overload range, determine the first cumulative number of jumps within the normal working range and the second cumulative number of jumps within the DPF overload range.

[0059] The first cumulative jump count is the number of times the voltage value of the DPF differential pressure sensor jumps within the normal operating range during the calibration time while the diesel engine is running. The second cumulative jump count is the number of times the voltage value of the DPF differential pressure sensor jumps within the DPF overload range during the calibration time while the diesel engine is running.

[0060] Specifically, when the diesel engine is running, if the voltage value of the DPF differential pressure sensor changes within the DPF overload range within the calibration time, the first cumulative number of changes within the normal operating range is incremented by one; when the diesel engine is running, if the voltage value of the DPF differential pressure sensor changes within the DPF overload range within the calibration time, the second cumulative number of changes within the DPF overload range is incremented by one.

[0061] S130. Determine whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative number of jumps and the second cumulative number of jumps.

[0062] If the first cumulative number of jumps is greater than the first jump number threshold, a DPF differential pressure sensor loose connection fault is reported; if the second cumulative number of jumps is greater than the second jump number threshold, a DPF differential pressure sensor loose connection fault is reported; if the first cumulative number of jumps is greater than the first jump number threshold and the second cumulative number of jumps is greater than the second jump number threshold, a DPF differential pressure sensor loose connection fault is reported.

[0063] The first and second jump count thresholds can be selected and set by those skilled in the art in combination with the actual needs of the DPF, and this embodiment does not impose any restrictions on them.

[0064] To prevent users from neglecting to address loose connection issues for extended periods, the reported loose connection time of the DPF differential pressure sensor is accumulated after a loose connection fault is reported. When the reported loose connection fault time is less than or equal to a preset fault time threshold, more serious fault diagnosis, such as DPF overload, is temporarily disabled, i.e., DPF differential pressure sensor fault diagnosis is prohibited. When the reported loose connection fault time exceeds the preset fault time threshold, more serious fault diagnosis, such as DPF overload, is no longer disabled, i.e., DPF differential pressure sensor fault diagnosis is allowed. After the vehicle's torque is limited, the user must go to a service station for repair. The service station can then refer to the loose connection fault to repair the relevant components of the vehicle.

[0065] It is understandable that disabling or enabling DPF differential pressure sensor fault diagnosis means using the DPF differential pressure sensor for related functional or other diagnostics.

[0066] The preset fault time threshold can be selected and set by those skilled in the art in combination with the actual needs of the DPF, and this embodiment does not impose any restrictions on it.

[0067] The technical solution of this invention involves collecting the voltage value of a DPF differential pressure sensor within a calibrated time period while the diesel engine is running, and determining whether the voltage value fluctuates within the normal operating range or within the DPF overload range. Based on the determination of whether the fluctuation is within the normal operating range or within the DPF overload range, a first cumulative number of fluctuations within the normal operating range and a second cumulative number of fluctuations within the DPF overload range are determined. The first and second cumulative number of fluctuations are used to determine whether a DPF differential pressure sensor loose connection fault should be reported. This invention solves the current problem of being unable to diagnose DPF differential pressure sensor loose connections when the voltage signal value is within the normal operating range, and the problem that occasional short-term loose connections may lead to false alarms of DPF differential pressure sensor loose connection faults. It achieves accurate diagnosis of DPF sensor loose connection conditions for different voltage operating conditions, while avoiding false alarms of occasional loose connection faults.

[0068] Example 2

[0069] Figure 2 This is a flowchart of a DPF differential pressure sensor detection method provided in Embodiment 2 of the present invention. Based on the above embodiments, this embodiment provides an optional implementation method. For example... Figure 2 As shown, the DPF differential pressure sensor detection method includes:

[0070] Power on S210 and T15.

[0071] S220. Determine whether the diesel engine is running. If yes, proceed to step S230; otherwise, proceed to step S210.

[0072] S230. Collect the voltage value of the DPF differential pressure sensor within the calibration time and execute step S240.

[0073] The calibration time can be selected and set by those skilled in the art in combination with the actual needs of the DPF, and this embodiment does not impose any restrictions on it.

[0074] The voltage value is obtained by collecting the DPF differential pressure sensor within the calibration time. It can be understood that if two or more current voltage values ​​are collected within the calibration time, it is then determined whether each voltage value jumps within the normal operating range or jumps within the DPF overload range.

[0075] In one embodiment, the voltage value of the DPF differential pressure sensor is collected continuously over multiple calibration periods. Then, it is determined whether the voltage value collected over each calibration period changes within the normal operating range or changes within the DPF overload range.

[0076] S240. Determine whether any voltage value within the calibration time is higher than the first voltage threshold and lower than the second voltage threshold within the calibration time. If yes, proceed to step S241; otherwise, proceed to step S250.

[0077] S241. If the voltage value changes within the normal operating range during the calibration time, increment the first cumulative number of changes within the normal operating range by one, and then proceed to step S242.

[0078] S242. Determine whether the first cumulative number of transitions is greater than the first number of transitions threshold. If yes, proceed to step S270; otherwise, proceed to step S210.

[0079] S250. Determine whether any voltage value within the calibration time is higher than the third voltage threshold within the calibration time. If yes, proceed to step S251; otherwise, proceed to step S260.

[0080] S251. The voltage value changes within the DPF overload range during the calibration time, and the second cumulative number of changes within the DPF overload range is incremented by one.

[0081] S252. Determine if the second cumulative number of transitions is greater than the second number of transitions threshold. If yes, proceed to step S270; otherwise, proceed to step S210.

[0082] S260, the cumulative voltage value does not change for a certain period of time, then proceed to step S261.

[0083] S261. Determine whether the cumulative voltage value does not change for a period of time exceeding the set non-change time threshold. If yes, proceed to step S262; otherwise, proceed to step S210.

[0084] Specifically, if the voltage value of the DPF differential pressure sensor does not change during the continuous calibration time, that is, if the cumulative voltage value does not change for more than the set non-change time threshold, the corresponding number of changes will be reduced, thereby avoiding occasional false alarms due to loose connection of the DPF differential pressure sensor.

[0085] S262. Decrement the first cumulative number of transitions and the second cumulative number of transitions by one respectively, and execute step S210.

[0086] S270, Report a fault in the DPF differential pressure sensor connection, proceed to step S280.

[0087] S280, cumulative reporting of DPF differential pressure sensor connection failure time.

[0088] S290. Determine whether the time of the intermittent connection fault is greater than the preset fault time threshold. If yes, proceed to step S291; otherwise, proceed to step S292.

[0089] S291, Allow DPF differential pressure sensor fault diagnosis.

[0090] S292. DPF differential pressure sensor fault diagnosis is prohibited.

[0091] The technical solution of this invention involves counting the number of voltage jumps of the DPF differential pressure sensor voltage signal within the normal operating range and the number of voltage jumps of the DPF differential pressure sensor voltage signal within the abnormal operating range (i.e., the DPF overload range). The two counts of jumps are compared with different thresholds. If either exceeds the threshold, a DPF differential pressure sensor loose connection fault is reported. That is, the number of voltage jumps in these two situations is judged separately. The DPF differential pressure sensor loose connection is diagnosed by comparing it with different thresholds under different operating conditions. After identifying the DPF differential pressure sensor loose connection, the driver is reminded to tighten the wiring harness to solve the problem of poor wiring harness contact.

[0092] Example 3

[0093] Figure 3 This is a schematic diagram of a DPF differential pressure sensor detection device provided in Embodiment 3 of the present invention. Figure 3 As shown, the DPF differential pressure sensor detection device includes:

[0094] The jump judgment module 310 is used to collect the voltage value of the DPF differential pressure sensor within a calibrated time while the diesel engine is running, and to determine whether the voltage value jumps within the normal operating range or jumps within the DPF overload range.

[0095] The jump count determination module 320 is used to determine the first cumulative jump count for jumps within the normal operating range and the second cumulative jump count for jumps within the DPF overload range based on the result of determining whether the jump is within the normal operating range or within the DPF overload range.

[0096] The fault diagnosis module 330 is used to determine whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative number of jumps and the second cumulative number of jumps.

[0097] Optionally, within the normal operating range, the voltage value transitions to a value higher than a first voltage threshold and lower than a second voltage threshold within a calibrated time period.

[0098] Determining whether the voltage value jumps within the normal operating range or within the DPF overload range is specifically used for:

[0099] Determine whether any voltage value within the calibration time exceeds the first voltage threshold and falls below the second voltage threshold within the calibration time. If so, the voltage value within the calibration time is considered to be within the normal operating range. If not, determine whether the voltage value within the calibration time is within the DPF overload range.

[0100] Optionally, within the DPF overload range, the voltage value jumps to a third voltage threshold within the calibrated time.

[0101] Determining whether the voltage value changes within the DPF overload range within the calibrated time period is specifically used for:

[0102] Determine whether any voltage value within the calibration time exceeds the third voltage threshold. If so, the voltage value within the calibration time is considered to have jumped within the DPF overload range. If not, the cumulative voltage value does not jump for a certain period of time.

[0103] Optionally, the DPF differential pressure sensor detection device further includes:

[0104] The non-jumping time accumulation module is used to decrement the first accumulated jump count and the second accumulated jump count by one when the accumulated voltage value non-jumping time exceeds the set non-jumping time threshold.

[0105] Optionally, the jump count determination module 320 is specifically used for:

[0106] If the voltage value changes within the normal operating range or within the DPF overload range within the calibrated time period, the first cumulative number of changes within the normal operating range and the second cumulative number of changes within the DPF overload range will be incremented by one, respectively.

[0107] Optionally, the fault diagnosis module 330 is specifically used for:

[0108] If the first cumulative number of jumps is greater than the first jump number threshold, and / or the second cumulative number of jumps is greater than the second jump number threshold, then a DPF differential pressure sensor loose connection fault is reported.

[0109] Optionally, the DPF differential pressure sensor detection device further includes:

[0110] The intermittent connection fault time accumulation module is used to accumulate the intermittent connection fault time reported by the DPF differential pressure sensor.

[0111] The intermittent connection fault handling module is used to perform fault diagnosis of the DPF differential pressure sensor when the intermittent connection fault time is greater than a preset fault time threshold.

[0112] When the intermittent connection fault time is less than or equal to the preset fault time threshold, DPF differential pressure sensor fault diagnosis is disabled.

[0113] The DPF differential pressure sensor detection device provided in this embodiment of the invention can execute the DPF differential pressure sensor detection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0114] Example 4

[0115] Figure 4 A schematic diagram of a vehicle 410, which can be used to implement embodiments of the present invention, is shown. The vehicle is intended to include various forms of digital computers, such as laptops, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframes, and other suitable computers. The vehicle may also include various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0116] like Figure 4 As shown, vehicle 410 includes at least one processor 411 and a memory, such as read-only memory (ROM 412) or random access memory (RAM 413), communicatively connected to the at least one processor 411. The memory stores computer programs executable by the at least one processor. The processor 411 can perform various appropriate actions and processes based on the computer program stored in the read-only memory (ROM 412) or the computer program loaded from storage unit 418 into the random access memory (RAM 413). The RAM 413 can also store various programs and data required for the operation of vehicle 410. The processor 411, ROM 412, and RAM 413 are interconnected via bus 414. An I / O (input / output) interface 415 is also connected to bus 414.

[0117] Multiple components in vehicle 410 are connected to I / O interface 415, including: input unit 416, such as keyboard, mouse, etc.; output unit 417, such as various types of displays, speakers, etc.; storage unit 418, such as disk, optical disk, etc.; and communication unit 419, such as network card, modem, wireless transceiver, etc. Communication unit 419 allows vehicle 410 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0118] Processor 411 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 411 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 411 performs the various methods and processes described above, such as the DPF differential pressure sensor detection method.

[0119] In some embodiments, the DPF differential pressure sensor detection method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 418. In some embodiments, part or all of the computer program may be loaded into and / or installed on vehicle 410 via ROM 412 and / or communication unit 419. When the computer program is loaded into RAM 413 and executed by processor 411, one or more steps of the DPF differential pressure sensor detection method described above may be performed. Alternatively, in other embodiments, processor 411 may be configured to perform the DPF differential pressure sensor detection method by any other suitable means (e.g., by means of firmware).

[0120] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0121] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0122] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0123] To provide interaction with the user, the systems and technologies described herein can be implemented in a vehicle having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the vehicle. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0124] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0125] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0126] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0127] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for detecting differential pressure using a DPF sensor, characterized in that, include: During diesel engine operation, the voltage value of the DPF differential pressure sensor is collected within a calibration time, and it is determined whether the voltage value jumps within the normal operating range or the DPF overload range. The normal operating range jump is defined as the voltage value being higher than a first voltage threshold and lower than a second voltage threshold within the calibration time. Determining whether the voltage value jumps within the normal operating range or the DPF overload range includes: determining whether any voltage value within the calibration time is higher than the first voltage threshold and lower than the second voltage threshold; if so, the voltage value within the calibration time is considered to have jumped within the normal operating range; otherwise, it is determined whether the voltage value within the calibration time jumps within the DPF overload range. Based on the result of determining whether the jump is within the normal operating range or within the DPF overload range, the first cumulative number of jumps within the normal operating range and the second cumulative number of jumps within the DPF overload range are determined respectively. Whether to report a DPF differential pressure sensor loose connection fault is determined based on the first cumulative jump count and the second cumulative jump count.

2. The DPF differential pressure sensor detection method according to claim 1, characterized in that, Within the DPF overload range, the voltage value jumps to a value higher than the third voltage threshold within the calibrated time. Determine whether the voltage value changes within the DPF overload range within the calibrated time, including: Determine whether any voltage value within the calibration time exceeds the third voltage threshold. If so, the voltage value within the calibration time is considered to have jumped within the DPF overload range. If not, the cumulative voltage value does not jump for a certain period of time.

3. The DPF differential pressure sensor detection method according to claim 2, characterized in that, The DPF differential pressure sensor detection method further includes: When the cumulative voltage value does not change for a period of time exceeding the set non-change time threshold, the first cumulative change count and the second cumulative change count are reduced by one respectively.

4. The DPF differential pressure sensor detection method according to claim 1, characterized in that, Based on the determination of whether the transition occurs within the normal operating range or within the DPF overload range, the first cumulative transition count for transitions within the normal operating range and the second cumulative transition count for transitions within the DPF overload range are determined, including: If the voltage value changes within the normal operating range or within the DPF overload range within the calibrated time period, the first cumulative number of changes within the normal operating range and the second cumulative number of changes within the DPF overload range will be incremented by one, respectively.

5. The DPF differential pressure sensor detection method according to claim 1, characterized in that, Determining whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative jump count and the second cumulative jump count includes: If the first cumulative number of jumps is greater than the first jump number threshold, and / or the second cumulative number of jumps is greater than the second jump number threshold, then a DPF differential pressure sensor loose connection fault is reported.

6. The DPF differential pressure sensor detection method according to claim 1, characterized in that, The DPF differential pressure sensor detection method further includes: The total reported time of intermittent connection faults in the DPF differential pressure sensor; When the intermittent connection fault time exceeds a preset fault time threshold, DPF differential pressure sensor fault diagnosis is allowed. When the intermittent connection fault time is less than or equal to the preset fault time threshold, DPF differential pressure sensor fault diagnosis is disabled.

7. A DPF differential pressure sensor detection device, characterized in that, include: The voltage jump determination module is used to collect the voltage value of the DPF differential pressure sensor within a calibration time while the diesel engine is running, and determine whether the voltage value jumps within the normal operating range or within the DPF overload range. Specifically, a jump within the normal operating range is defined as a voltage value exceeding a first voltage threshold and falling below a second voltage threshold within the calibration time. The determination of whether the voltage value jumps within the normal operating range or within the DPF overload range is specifically performed by: determining whether any voltage value within the calibration time exceeds the first voltage threshold and falls below the second voltage threshold; if so, the voltage value within the calibration time is considered to have jumped within the normal operating range; otherwise, it is determined whether the voltage value within the calibration time jumps within the DPF overload range. The jump count determination module is used to determine the first cumulative jump count for jumps within the normal operating range and the second cumulative jump count for jumps within the DPF overload range, based on the result of determining whether the jump is within the normal operating range or within the DPF overload range. The fault diagnosis module is used to determine whether to report a DPF differential pressure sensor loose connection fault based on the first cumulative jump count and the second cumulative jump count.

8. A vehicle, characterized in that, The vehicles include: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the DPF differential pressure sensor detection method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the DPF differential pressure sensor detection method according to any one of claims 1-6.

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