CN113917322A - Fault detection method of air inlet heating relay and related device - Google Patents
Fault detection method of air inlet heating relay and related device Download PDFInfo
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Abstract
The embodiment of the application provides a fault detection method and a relevant device for an air inlet heating relay. If the key-on gear is currently being used (i.e., T15 is powered on), then a warm-up operation is performed. Recording a first voltage value of the storage battery at the preheating end time, and acquiring a first average voltage of the storage battery in a first time period after the preheating is finished. Because the power consumption in the preheating process is larger, the voltage value of the storage battery after the preheating is finished is higher than that in the preheating process, and whether the air inlet heating relay is adhered or not can be determined according to the comparison result of the first voltage value and the average voltage value. The original circuit structure is not changed in the process, and the fault detection cost is reduced.
Description
Technical Field
The invention relates to the technical field of engine control, in particular to a fault detection method of an air inlet heating relay and a related device.
Background
The cold start is an important index for evaluating the performance of the diesel engine, and in order to ensure the smooth start of the vehicle under the low-temperature condition, most of the recent diesel engines adopt an air inlet grille heating mode, and the traditional cylinder heating mode is replaced by an air inlet heating mode. In the heating process, an ECU (Electronic Control Unit) controls the opening and closing of the air inlet heating relay so as to Control the power supply heating of the air inlet heating grid in the pipeline.
Due to the physical reason of the contact part of the air inlet heating relay, the situation that the air inlet heating relay cannot be normally disconnected after being closed for a long time exists, namely, the air inlet heating relay is stuck. The heating relay that admits air can continuously keep admitting air under the adhesion state and heat the state, and this anomaly can not be discerned by ECU, and then causes risks such as circuit burnout, vehicle fire. In the related art, the internal circuit of the air inlet heating relay is modified to obtain the output voltage in the mode of an external feedback line, and then whether adhesion exists is judged. The detection mode modifies the original circuit structure, adds new circuit devices and has higher cost.
Disclosure of Invention
The embodiment of the application provides a fault detection method and a related device for an air inlet heating relay, which are used for determining whether the air inlet heating relay is adhered or not according to a comparison result of a voltage value of a storage battery at the air inlet heating finishing moment and an average voltage value in a certain time period after the air inlet heating finishing moment. The original circuit is not required to be modified, and the fault detection cost is reduced.
In a first aspect, an embodiment of the present application provides a method for detecting a fault of an intake air heating relay, where the method includes:
responding to an intake air heating instruction, and detecting the current starting gear of an ignition switch;
if the current starting gear is a switch-on gear, executing preheating operation, and determining a first voltage value of the storage battery at the moment of finishing preheating and a first average voltage value of the storage battery in a first time period; wherein the first time period is after the preheating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the first voltage value and the first average voltage value.
According to the embodiment of the application, when the air inlet relay heater heats air inlet air, the current gear of the ignition switch is detected in advance. If the key-on gear is currently being used (i.e., T15 is powered on), then a warm-up operation is performed. Recording a first voltage value of the storage battery at the preheating end time, and acquiring a first average voltage of the storage battery in a first time period after the preheating is finished. Because the power consumption in the preheating process is larger, the voltage value of the storage battery after the preheating is finished is higher than that in the preheating process, and whether the air inlet heating relay is adhered or not can be determined according to the comparison result of the first voltage value and the average voltage value.
In some possible embodiments, when the preheating operation is performed, the method further includes:
determining the current voltage value of the storage battery at the preheating starting moment;
if the current voltage value is higher than a first threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the first threshold value is obtained based on an Electronic Control Unit (ECU) power supply voltage.
According to the embodiment of the application, at the preheating starting stage, the current voltage value of the storage battery is compared with the first threshold value, and whether the preheating operation is executed by the air inlet heating relay is determined according to the comparison result. If the current voltage value of the storage battery is higher than the first threshold value, the fact that the preheating operation is not executed by the air inlet heating relay currently is indicated, and the fact that the actuator is not executed (namely, the heating grid is not operated) is very likely to result. And at the moment, outputting prompt information for prompting a user to detect the heating grid, and ending the fault detection process.
In some possible embodiments, when the preheating operation is performed, the method further includes:
detecting a third voltage average value of the storage battery in a third time period in the preheating process;
if the third voltage average value is higher than a second threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the second threshold value is derived based on an Electronic Control Unit (ECU) supply voltage.
Since the preheating process consumes large electric power and pulls down the voltage, the embodiment of the application may further determine whether the intake air heating relay performs the preheating operation by detecting a comparison result between an average voltage value of the battery over a certain period of time and the second threshold value during the preheating process.
In some possible embodiments, after determining whether the intake air heating relay is stuck according to the comparison result of the first voltage value and the first average voltage value, the method further includes:
responding to the starting indication of the starting gear, and executing temperature detection operation;
if the current temperature in the vehicle is smaller than the temperature threshold, performing post-heating operation, and determining a second voltage value of the storage battery at the post-heating finishing moment and a second average voltage value of the storage battery in a second time period; wherein the second time period is after the post-heating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the second voltage value and the second average voltage value.
The intake air heating relay detects the ambient temperature in the vehicle at the time of starting the starting gear (power-on at T50) after the end of warming up, and performs the post-heating operation when the ambient temperature is lower than the threshold value. According to the embodiment of the application, the second voltage value of the storage battery is recorded at the end time of the post-heating, and the second average voltage of the storage battery in the second time period after the preheating is finished is obtained. Because the electric power consumption in the post-heating process is larger, the voltage value of the storage battery after the post-heating process is higher than that in the post-heating process, and whether the air inlet heating relay is adhered or not can be determined according to the comparison result of the second voltage value and the second average voltage value.
In some possible embodiments, when performing the post-heating operation, the method further comprises:
determining the current voltage value of the storage battery at the post-heating starting moment;
if the current voltage value is smaller than a third threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the third threshold is derived based on an ECU supply voltage.
According to the embodiment of the application, at the post-heating starting stage, the current voltage value of the storage battery is compared with the third threshold value, and whether the post-heating operation is executed by the air inlet heating relay is determined according to the comparison result. If the current voltage value of the storage battery is higher than the third threshold value, the current voltage value indicates that the post-addition operation is not executed by the intake air heating relay, and is most likely caused by the fact that the actuator is not executed (namely, the heating grid is not operated). And at the moment, outputting prompt information for prompting a user to detect the heating grid, and ending the fault detection process.
In some possible embodiments, when performing the post-heating operation, the method further comprises:
detecting a fourth average voltage of the battery during a fourth time period during post-heating;
if the fourth voltage average value is higher than a fourth threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the fourth threshold is derived based on an Electronic Control Unit (ECU) supply voltage.
Since the post-heating process consumes a large amount of electric power and pulls down the voltage, the embodiment of the present application may further determine whether the intake air heating relay performs the post-heating operation by detecting a comparison result between an average voltage value of the battery over a certain period of time and the fourth threshold value in the post-heating process.
In some possible embodiments, the method further comprises:
and if the current adhesion of the air inlet heating relay is determined according to the comparison result, outputting prompt information representing the adhesion fault of the air inlet heating relay.
According to the embodiment of the application, after the adhesion of the air inlet heating relay is determined, the fault prompt information for representing the adhesion of the air inlet heating relay is output to a user to warn the user to process as soon as possible, and the circuit is prevented from being burnt.
In a second aspect, an embodiment of the present application provides a fault detection apparatus for an intake air heating relay, the apparatus including:
the gear detection module is configured to execute detection of the current starting gear of the ignition switch in response to the intake air heating indication;
the voltage comparison module is configured to execute preheating operation if the current starting gear is a switch-on gear, and determine a first voltage value of the storage battery at the moment of preheating ending and a first average voltage value of the storage battery in a first time period; wherein the first time period is after the preheating end time;
an adhesion detection module configured to perform a determination of whether the intake air heating relay is adhered according to a comparison result of the first voltage value and the first average voltage value.
In some possible embodiments, when performing the warm-up operation, the voltage comparison module is further configured to:
determining the current voltage value of the storage battery at the preheating starting moment;
if the current voltage value is higher than a first threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the first threshold value is obtained based on an Electronic Control Unit (ECU) power supply voltage.
In some possible embodiments, when performing the warm-up operation, the voltage comparison module is further configured to:
detecting a third voltage average value of the storage battery in a third time period in the preheating process;
if the third voltage average value is higher than a second threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the second threshold value is derived based on an Electronic Control Unit (ECU) supply voltage.
In some possible embodiments, after performing the determination of whether the intake air heating relay is stuck according to the comparison result of the first voltage value and the first average voltage value, the sticking detection module is further configured to:
responding to the starting indication of the starting gear, and executing temperature detection operation;
if the current temperature in the vehicle is smaller than the temperature threshold, performing post-heating operation, and determining a second voltage value of the storage battery at the post-heating finishing moment and a second average voltage value of the storage battery in a second time period; wherein the second time period is after the post-heating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the second voltage value and the second average voltage value.
In some possible embodiments, while performing the post-heating operation, the adhesion detection module is further configured to:
determining the current voltage value of the storage battery at the post-heating starting moment;
if the current voltage value is smaller than a third threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the third threshold is derived based on an ECU supply voltage.
In some possible embodiments, while performing the post-heating operation, the adhesion detection module is further configured to:
detecting a fourth average voltage of the battery during a fourth time period during post-heating;
if the fourth voltage average value is higher than a fourth threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the fourth threshold is derived based on an Electronic Control Unit (ECU) supply voltage.
In some possible embodiments, the adhesion detection module is further configured to:
and if the current adhesion of the air inlet heating relay is determined according to the comparison result, outputting prompt information representing the adhesion fault of the air inlet heating relay.
In a third aspect, an embodiment of the present application further provides an electronic device, including:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement any of the methods as provided in the first aspect of the application.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, where instructions, when executed by a processor of an electronic device, enable the electronic device to perform any one of the methods as provided in the first aspect of the present application.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1a is a schematic structural diagram of an intake air heating system provided in an embodiment of the present application;
FIG. 1b is another schematic diagram of a configuration of an inlet air heating system provided in an embodiment of the present application;
FIG. 2a is a flowchart of a method for detecting a fault of an intake air heating relay according to an embodiment of the present disclosure;
fig. 2b is a schematic diagram of a prompt message provided in the embodiment of the present application;
FIG. 3 is another flow chart of a method for detecting a fault in an intake air heating relay according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a fault detection device 400 of an intake air heating relay according to an embodiment of the present application;
fig. 5 is a schematic view of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described in detail and clearly with reference to the accompanying drawings. In the description of the embodiments of the present application, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" in the text is only an association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: three cases of a alone, a and B both, and B alone exist, and in addition, "a plurality" means two or more than two in the description of the embodiments of the present application.
In the description of the embodiments of the present application, the term "plurality" means two or more unless otherwise specified, and other terms and the like should be understood similarly, and the preferred embodiments described herein are only for the purpose of illustrating and explaining the present application, and are not intended to limit the present application, and features in the embodiments and examples of the present application may be combined with each other without conflict.
This is explained in detail below with reference to the figures and the detailed description. Although the embodiments of the present application provide method steps as shown in the following embodiments or figures, more or fewer steps may be included in the method based on conventional or non-inventive efforts. In steps where no necessary causal relationship exists logically, the order of execution of the steps is not limited to that provided by the embodiments of the present application. The method can be executed in the order of the embodiments or the method shown in the drawings or in parallel in the actual process or the control device.
In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, first, a structure of an intake air heating system of a diesel engine is briefly described, and specifically, as shown in fig. 1a, the intake air heating system of the diesel engine includes an electronic control unit 10, an intake air heating relay 20, and an intake air heating grille 30.
Wherein, the electronic control unit 10 is connected with the intake air heater 20 through a line a, and the electronic control unit 10 can issue an intake air heating instruction to the intake air heater 20 through the line a. The air inlet heater 20 and the air inlet heating grid 30 are connected with the storage battery, and a user can control the air inlet heating relay 20 to heat the air inlet through the electronic control unit 10. The intake air heating relay 20 actually supplies power to the intake air heating grille 30 to heat the intake air after the intake air heating relay 20 is closed in the intake air heating process. After the heating is finished, the air inlet heating relay 20 controls the storage battery to stop supplying power to the air inlet heating grid 30 by disconnecting the current pull-in state, so as to finish the heating. If there is a problem in the contact portion of the inlet heating relay 20, and the suction state cannot be disconnected, the inlet heating grill 30 will always be heated, and the wire line of the inlet heating grill 30 will be burned, even the vehicle will be on fire, and other serious problems.
In the related art, a feedback line is formed by adding a pin bundle and a pin to an intake air heating system, for example, as shown in fig. 1a, a feedback line B for connection is added between the electronic control unit 10, the intake air heating relay 20 and the intake air heating grill 30, so that the electronic control unit 10 knows the output voltage of the intake air heating relay 20 based on the feedback line, and then determines whether the intake air heating relay 20 is in the stuck state, as shown in fig. 1B. However, the detection mode modifies the original circuit structure of the air inlet heating system, and needs to be additionally connected with a feedback line, so that the hardware cost is increased.
In order to solve the above problems, the inventive concept of the present application is: when the air inlet relay heater heats air inlet air, the current gear of the ignition switch is detected in advance. If the key-on gear is currently being used (i.e., T15 is powered on), then a warm-up operation is performed. Recording a first voltage value of the storage battery at the preheating end time, and acquiring a first average voltage of the storage battery in a first time period after the preheating is finished. Because the power consumption in the preheating process is larger, the voltage value of the storage battery after the preheating is finished is higher than that in the preheating process, and whether the air inlet heating relay is adhered or not can be determined according to the comparison result of the first voltage value and the average voltage value. The original circuit structure is not changed in the process, and the fault detection cost is reduced.
The method for detecting a fault of an intake air heating relay according to an embodiment of the present application is described in detail below with reference to the accompanying drawings, specifically as shown in fig. 2a, the method includes the following steps:
in order to facilitate understanding of the technical solutions provided in the embodiments of the present application, a heating process of the intake air heating relay is briefly described first. When a user turns ON a vehicle key to a switch-ON gear (ON gear), a whole vehicle circuit is switched ON, and the ECU performs necessary preparation work and self-checking work for starting the engine. The operation performed when the intake air heating relay performs intake air heating at this time is a warm-up operation. When a user turns a vehicle key to a starting gear (START gear), a vehicle starter circuit is turned on and the engine is started. At the moment, the air inlet heating relay can automatically determine whether the vehicle needs to be heated according to the current ambient temperature, and the heating operation executed at the moment is post-heating operation. Since the vehicle needs to be in the on-gear in advance before being in the starting gear, whether the intake air heating relay is in the adhesion state or not needs to be detected in the preheating stage.
Step 201: and detecting the current opening gear of an ignition switch in response to the intake air heating indication.
Step 202: if the current starting gear is a switch-on gear, executing preheating operation, and determining a first voltage value of the storage battery at the moment of finishing preheating and a first average voltage value of the storage battery in a first time period; wherein the first period of time is after the end of preheating.
Step 203: and determining whether the air inlet heating relay is adhered or not according to the comparison result of the first voltage value and the first average voltage value.
Because the power consumption in the preheating process is large, the voltage after the preheating is finished is higher than the voltage in the preheating process. Therefore, the first voltage of the battery at the warm-up end time should be smaller than the voltage of the battery after a certain period of warm-up end. In order to avoid the influence of the instantaneous working voltage of the vehicle on the comparison result, the first average voltage value in the first time period can be selected to be compared with the first voltage value. In practical application, although the ECU cannot know whether the intake air heating relay is on (i.e., whether to be closed or opened), the ECU will give a prompt to a user whether the preheating is finished. Therefore, if the first average voltage value is lower than the first voltage value, it indicates that the intake air heating relay is still operating, i.e., the intake air heating relay is in an adhesion state.
In addition, when the problems of abnormal connection and the like of internal devices in the air inlet heating system are considered, the air inlet heating relay cannot work, and the cold start of the diesel engine is difficult. This is mostly caused by an abnormal connection of the intake grill. Therefore, before detecting whether the air inlet heating relay is in an adhesion state, whether the air inlet heating relay works needs to be detected. If the air inlet heating relay does not work, subsequent fault detection is not needed. Thus, the operation state of the intake air heating relay may be detected before the above-described step 202 is performed.
In practice, the present voltage value of the battery can be monitored at the beginning of the warm-up. And if the current voltage value is higher than the first threshold, outputting prompt information shown in fig. 2b, wherein the prompt information is used for prompting a user to detect the air inlet heating grille and inform the user that the current air inlet heating relay has a fault and cannot work. And after outputting the prompt information, ending the fault detection process.
Wherein the first threshold is derived based on a supply voltage of the electronic control unit. The commercially available electronically controlled mains supply voltage supplies are divided into 12v (volts) and 24 v. Taking a supply voltage of 24v as an example, the voltage value of the battery after T15 is started should be 24v, electric power is consumed when the intake air heating relay is operated, the battery voltage is pulled down, and thus the voltage value of the battery at the warm-up start time should be less than 24 v. In practical applications, such as playing songs, turning on lights, etc., the voltage of the battery is less than 24v, but much less than the electric power consumed by the operation of the intake heating relay. A reasonable threshold can thus be set to compare with this 24v, for example a first threshold of 23 v. Therefore, the detection result can be prevented from being influenced by low-power operation such as song playing, lamp turning on and the like.
In addition, in consideration of the susceptibility of the instantaneous voltage to influence, during the warm-up process, whether the heating relay is operated or not may be determined according to the comparison result of the average voltage of the secondary battery over a period of time with a preset threshold value. Specifically, a third voltage average value of the battery over a third time period is detected. And if the third voltage average value is higher than the second threshold value, outputting prompt information for detecting the heating grid, and ending the fault detection process. The second threshold is derived based on the supply voltage of the electronic control unit, and may be the same as the first threshold.
As described above, after the ignition switch of the vehicle is shifted from the on-gear to the start-gear, the intake air heating system controls the intake air heating relay to perform the post-heating operation based on the ambient temperature. Whether sword gas heating relay is in the adhesion state still need to detect after the heat accumulation to avoid causing risks such as circuit fire because of the relay adhesion.
In implementation, a second voltage value of the storage battery at the end time of the post-heating and a second average voltage value of the storage battery in a second time period are obtained. In order to determine whether the air inlet heating relay is in an adhesion state as early as possible, the average voltage (second average voltage value) of the storage battery in a second time period is recorded immediately after the post-heating is finished, and whether the air inlet heating relay is adhered is determined according to a comparison result of the second average voltage value and the second voltage value. The second time period may be set based on actual conditions, and may be the same as the aforementioned first time period, for example, 8 seconds.
Based on the same idea of detecting the air inlet heating relay in the preheating stage, if the air inlet heating relay does not work, subsequent fault detection is not needed. Therefore, before detecting whether the air inlet heating relay is adhered after the post-heating is finished, the working state of the air inlet heating relay can be detected.
In practice, the current voltage value of the battery is determined at the post-heating start time. And if the current voltage value is smaller than the third threshold value, outputting prompt information for detecting the heating grid, and finishing the fault detection process. Wherein the third threshold is derived based on an ECU supply voltage.
Specifically, the ignition switch needs to be in the starting gear when the intake air heating relay performs the post-heating operation. At the moment, the vehicle T50 is powered on, the engine is started, and the voltage of the whole vehicle is higher than the power supply voltage of the electronic control unit. Still taking the supply voltage of 24v as an example, the battery voltage after T50 is powered on should be 26 v. When the intake air heating relay is operated, electric power is consumed to pull down the battery voltage, so that the voltage value of the battery should be less than 28v at the time of start of warm-up. And because the voltage value of the storage battery is smaller than 28v when the small-power operation such as song playing, light turning on and the like is carried out, in order to avoid the influence of the small-power operation on the detection result, the third threshold value can be set to be 28 v.
In addition, in consideration of the susceptibility of the instantaneous voltage to influence, in the post-heating process, whether the heating relay is operated or not may be determined according to a comparison result of the average voltage of the secondary battery over a period of time with a preset threshold value. Specifically, a fourth average voltage of the battery over a fourth time period is detected. And if the fourth voltage average value is higher than the fourth threshold value, outputting prompt information for detecting the heating grid as shown in fig. 2a, and ending the fault detection process. The fourth threshold is obtained based on the power supply voltage of the ECU, which is not described herein again.
Through the process, whether the air inlet heating relay is adhered or not is determined according to the comparison result of the voltage value of the storage battery at the air inlet heating finishing moment and the average voltage value within a certain time period after the air inlet heating finishing moment. The original circuit is not required to be modified, and the fault detection cost is reduced. In addition, after the air inlet heating relay is determined to be in the adhesion state, prompt information for representing the adhesion fault of the air inlet heating relay can be output to prompt a user to process as soon as possible.
In order to facilitate understanding of the overall process of fault detection for the intake air heating relay in the embodiment of the present application, specifically, as shown in fig. 3, the method includes the following steps:
step 301: the key T15 is powered and the ignition is in the on gear.
Step 302: the intake air heating relay starts preheating.
Step 303: and detecting whether the air inlet heating relay is in a working state, if not, outputting prompt information for detecting the heating grid, and finishing the fault detection process.
Step 304: it is determined whether a first average voltage value of the battery over a first period of time is less than a first voltage value at the end of warm-up. If the current value is less than the preset value, the air inlet heating relay is in an adhesion state, and at the moment, prompt information for prompting a user is output.
Step 305: and after the ignition switch is in a starting gear, determining whether to perform post-heating according to the ambient temperature.
Step 306: and detecting whether the air inlet heating relay is in a working state or not in the post-heating process, outputting prompt information for detecting the heating grid if the air inlet heating relay is not in the working state, and finishing the fault detection process.
Step 307: it is determined whether a second average voltage value of the battery during the second period of time is less than a second voltage value at the warm-up end time. If the current value is less than the preset value, the air inlet heating relay is in an adhesion state, and at the moment, prompt information for prompting a user is output.
Based on the same inventive concept, the embodiment of the present application further provides a fault detection apparatus 400 of an intake air heating relay, as shown in fig. 4, including:
a gear detection module 401 configured to perform detection of a currently-turned-on gear of an ignition switch in response to an intake air heating instruction;
a voltage comparison module 402 configured to execute a warm-up operation if the current starting gear is a key-on gear, and determine a first voltage value of the battery at a warm-up end time and a first average voltage value of the battery in a first time period; wherein the first time period is after the preheating end time;
an adhesion detection module 403 configured to perform a determination of whether the intake air heating relay is adhered according to a comparison result of the first voltage value and the first average voltage value.
In some possible embodiments, when performing the warm-up operation, the voltage comparison module 402 is further configured to:
determining the current voltage value of the storage battery at the preheating starting moment;
if the current voltage value is higher than a first threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the first threshold value is obtained based on an Electronic Control Unit (ECU) power supply voltage.
In some possible embodiments, when performing the warm-up operation, the voltage comparison module 402 is further configured to:
detecting a third voltage average value of the storage battery in a third time period in the preheating process;
if the third voltage average value is higher than a second threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the second threshold value is derived based on an Electronic Control Unit (ECU) supply voltage.
In some possible embodiments, after performing the determination of whether the intake air heating relay is stuck according to the comparison result of the first voltage value and the first average voltage value, the sticking detection module 403 is further configured to:
responding to the starting indication of the starting gear, and executing temperature detection operation;
if the current temperature in the vehicle is smaller than the temperature threshold, performing post-heating operation, and determining a second voltage value of the storage battery at the post-heating finishing moment and a second average voltage value of the storage battery in a second time period; wherein the second time period is after the post-heating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the second voltage value and the second average voltage value.
In some possible embodiments, when performing the post-heating operation, the adhesion detection module 403 is further configured to:
determining the current voltage value of the storage battery at the post-heating starting moment;
if the current voltage value is smaller than a third threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the third threshold is derived based on an ECU supply voltage.
In some possible embodiments, when performing the post-heating operation, the adhesion detection module 403 is further configured to:
detecting a fourth average voltage of the battery during a fourth time period during post-heating;
if the fourth voltage average value is higher than a fourth threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the fourth threshold is derived based on an Electronic Control Unit (ECU) supply voltage.
In some possible embodiments, the adhesion detection module 403 is further configured to:
and if the current adhesion of the air inlet heating relay is determined according to the comparison result, outputting prompt information representing the adhesion fault of the air inlet heating relay.
The playback device 130 according to this embodiment of the present application is described below with reference to fig. 5. The playback device 130 shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 5, the playback device 130 is embodied in the form of a general-purpose playback device. The components of the playback device 130 may include, but are not limited to: the at least one processor 131, the at least one memory 132, and a bus 133 that connects the various system components (including the memory 132 and the processor 131).
The memory 132 may include readable media in the form of volatile memory, such as Random Access Memory (RAM)1321 and/or cache memory 1322, and may further include Read Only Memory (ROM) 1323.
The playback device 130 may also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), with one or more devices that enable a user to interact with the playback device 130, and/or with any devices (e.g., router, modem, etc.) that enable the playback device 130 to communicate with one or more other playback devices. Such communication may occur via input/output (I/O) interfaces 135. Also, the playback device 130 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 136. As shown, the network adapter 136 communicates with other modules for the playback device 130 over the bus 133. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the playback device 130, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
In an exemplary embodiment, a computer-readable storage medium comprising instructions, such as the memory 132 comprising instructions, executable by the processor 131 of the apparatus 400 to perform the above-described method is also provided. Alternatively, the computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
In an exemplary embodiment, there is also provided a computer program product comprising computer programs/instructions which, when executed by the processor 131, implement any of the intake air heating relay fault detection methods as provided herein.
In exemplary embodiments, various aspects of a method for detecting a fault of an intake air heating relay provided by the present application may also be embodied in the form of a program product including program code for causing a computer device to perform the steps of a method for detecting a fault of an intake air heating relay according to various exemplary embodiments of the present application described above in this specification when the program product is run on the computer device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The program product for fault detection of an intake air heating relay of the embodiments of the present application may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a playback device. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "for example" programming language or similar programming languages. The program code may execute entirely on the user playback device, partly on the user device, as a stand-alone software package, partly on the user playback device and partly on the remote playback device, or entirely on the remote playback device or server. In the case of a remote playback device, the remote playback device may be connected to the user playback device via any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external playback device (e.g., via the internet using an internet service provider).
It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such division is merely exemplary and not mandatory. Indeed, the features and functions of two or more units described above may be embodied in one unit, according to embodiments of the application. Conversely, the features and functions of one unit described above may be further divided into embodiments by a plurality of units.
Further, while the operations of the methods of the present application are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable image scaling apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable image scaling apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable image scaling apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable image scaling device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer implemented process such that the instructions which execute on the computer or other programmable device provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of fault detection for an intake air heating relay, the method comprising:
responding to an intake air heating instruction, and detecting the current starting gear of an ignition switch;
if the current starting gear is a switch-on gear, executing preheating operation, and determining a first voltage value of the storage battery at the moment of finishing preheating and a first average voltage value of the storage battery in a first time period; wherein the first time period is after the preheating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the first voltage value and the first average voltage value.
2. The method of claim 1, wherein when performing a warm-up operation, the method further comprises:
determining the current voltage value of the storage battery at the preheating starting moment;
if the current voltage value is higher than a first threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the first threshold value is obtained based on an Electronic Control Unit (ECU) power supply voltage.
3. The method of claim 1, wherein when performing a warm-up operation, the method further comprises:
detecting a third voltage average value of the storage battery in a third time period in the preheating process;
if the third voltage average value is higher than a second threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the second threshold value is derived based on an Electronic Control Unit (ECU) supply voltage.
4. The method according to claim 1, wherein after determining whether the intake air heating relay is stuck according to the comparison result of the first voltage value and the first average voltage value, the method further comprises:
responding to the starting indication of the starting gear, and executing temperature detection operation;
if the current temperature in the vehicle is smaller than the temperature threshold, performing post-heating operation, and determining a second voltage value of the storage battery at the post-heating finishing moment and a second average voltage value of the storage battery in a second time period; wherein the second time period is after the post-heating end time;
and determining whether the air inlet heating relay is adhered or not according to the comparison result of the second voltage value and the second average voltage value.
5. The method of claim 4, wherein when performing the post-heating operation, the method further comprises:
determining the current voltage value of the storage battery at the post-heating starting moment;
if the current voltage value is smaller than a third threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the third threshold is derived based on an ECU supply voltage.
6. The method of claim 4, wherein when performing the post-heating operation, the method further comprises:
detecting a fourth average voltage of the battery during a fourth time period during post-heating;
if the fourth voltage average value is higher than a fourth threshold value, outputting prompt information for detecting a heating grid, and ending the fault detection process; wherein the fourth threshold is derived based on an Electronic Control Unit (ECU) supply voltage.
7. The method of claim 1 or 4, further comprising:
and if the current adhesion of the air inlet heating relay is determined according to the comparison result, outputting prompt information representing the adhesion fault of the air inlet heating relay.
8. A fault detection device for an intake air heating relay, the device comprising:
the gear detection module is configured to execute detection of the current starting gear of the ignition switch in response to the intake air heating indication;
the voltage comparison module is configured to execute preheating operation if the current starting gear is a switch-on gear, and determine a first voltage value of the storage battery at the moment of preheating ending and a first average voltage value of the storage battery in a first time period; wherein the first time period is after the preheating end time;
an adhesion detection module configured to perform a determination of whether the intake air heating relay is adhered according to a comparison result of the first voltage value and the first average voltage value.
9. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method of fault detection of an intake air heating relay of any one of claims 1 to 7.
10. A computer-readable storage medium, wherein instructions in the computer-readable storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of detecting a failure of an intake air heating relay according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111079810.7A CN113917322A (en) | 2021-09-15 | 2021-09-15 | Fault detection method of air inlet heating relay and related device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111079810.7A CN113917322A (en) | 2021-09-15 | 2021-09-15 | Fault detection method of air inlet heating relay and related device |
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| CN113917322A true CN113917322A (en) | 2022-01-11 |
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