Silicone oil clutch fan diagnosis method, device, equipment and readable storage medium

Abstract

The present invention provides a method, device, equipment and readable storage medium for diagnosing a silicone oil clutch fan. The method includes: in each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is fault-free, recording the first cumulative duration when the silicone oil clutch fan driving duty ratio is equal to zero, and the second cumulative duration and continuous duration when the silicone oil clutch fan speed is lower than the full separation speed of the silicone oil clutch fan when the silicone oil clutch fan driving duty ratio is equal to zero; detecting whether the silicone oil clutch fan can be disengaged according to the first cumulative duration, the second cumulative duration and the continuous duration; if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, outputting a silicone oil clutch fan fault reminder. Through the present invention, the problem that the prior art cannot determine whether the silicone oil clutch fan can be disengaged is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a silicone oil clutch fan diagnosis method, device, equipment and readable storage medium. Background Art

[0002] The silicone oil clutch fan includes a silicone oil clutch and a fan. The silicone oil clutch is installed between the engine and the fan. Its function is to achieve the engagement or disengagement of the power transmission process between the engine and the fan. If the silicone oil clutch fan cannot be disengaged, it will lead to a waste of engine power. Therefore, it is very important to monitor whether the silicone oil clutch fan can be disengaged during driving.

[0003] At present, the fault detection of the silicone oil clutch fan is mainly the electrical fault detection of the fan speed sensor (such as the fan speed sensor open circuit, short circuit to electricity, short circuit to ground) and the rationality fault detection of the fan speed sensor (such as fan speed exceeding the limit, etc.). However, the fault detection of the fan speed sensor can only determine the credibility of the fan speed signal, and cannot determine whether the silicone oil clutch fan can be disengaged from the engine. Therefore, there is an urgent need for a technical solution that can determine whether the silicone oil clutch fan can be disengaged. Summary of the invention

[0004] The main purpose of the present invention is to provide a silicone oil clutch fan diagnostic method, device, equipment and readable storage medium, aiming to solve the problem that the prior art cannot determine whether the silicone oil clutch fan can be disengaged.

[0005] In a first aspect, the present invention provides a method for diagnosing a silicone oil clutch fan, the method comprising:

[0006] In each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty, record a first cumulative duration during which the silicone oil clutch fan driving duty cycle is equal to zero, and a second cumulative duration and a continuous duration during which the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero;

[0007] Detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time;

[0008] If the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0009] Optionally, the step of detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time includes:

[0010] When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold;

[0011] If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

[0012] Optionally, after the step of detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, the method further includes:

[0013] If the quotient of the second accumulated time divided by the first accumulated time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged.

[0014] Optionally, the step of detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time includes:

[0015] When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0016] Optionally, when the engine stops and / or the silicone oil clutch fan speed sensor fails, the timers corresponding to the first accumulated time, the second accumulated time and the continuous time stop timing.

[0017] In a second aspect, the present invention further provides a silicone oil clutch fan diagnostic device, the silicone oil clutch fan diagnostic device comprising:

[0018] A recording module, for recording, in each driving cycle, a first accumulated time duration during which a silicone oil clutch fan driving duty cycle is equal to zero, and a second accumulated time duration and a continuous time duration during which a silicone oil clutch fan speed is lower than a silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty;

[0019] A detection module, used for detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time;

[0020] The output module is used to output a silicone oil clutch fan fault reminder if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0021] Optionally, the detection module is used to:

[0022] When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold;

[0023] If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

[0024] Optionally, the detection module is further used to:

[0025] When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0026] In a third aspect, the present invention also provides a silicone oil clutch fan diagnostic device, which includes a processor, a memory, and a silicone oil clutch fan diagnostic program stored in the memory and executable by the processor, wherein when the silicone oil clutch fan diagnostic program is executed by the processor, the steps of the silicone oil clutch fan diagnostic method as described above are implemented.

[0027] In a fourth aspect, the present invention further provides a readable storage medium, on which a silicone oil clutch fan diagnostic program is stored, wherein when the silicone oil clutch fan diagnostic program is executed by a processor, the steps of the silicone oil clutch fan diagnostic method as described above are implemented.

[0028] In the present invention, in each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor has no faults, the first cumulative time when the silicone oil clutch fan driving duty cycle is equal to zero, and the second cumulative time and continuous time when the silicone oil clutch fan driving duty cycle is equal to zero, the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed. The first cumulative time, the second cumulative time and the continuous time are used to detect whether the silicone oil clutch fan can be disengaged; if the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process of engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer. Through the present invention, in each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor has no faults, it is possible to detect whether the silicone oil clutch fan can be disengaged based on the first accumulated time when the silicone oil clutch fan driving duty cycle is equal to zero, and the second accumulated time and continuous time when the silicone oil clutch fan driving duty cycle is equal to zero and the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed. If the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output to improve the accuracy of the output result. At the same time, a technical solution that can determine whether the silicone oil clutch fan can be disengaged is provided, which solves the problem that the prior art cannot determine whether the silicone oil clutch fan can be disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the hardware structure of the silicone oil clutch fan diagnostic device involved in the embodiment of the present invention;

[0031] Figure 2 It is a schematic flow chart of a first embodiment of a method for diagnosing a fan of a silicone oil clutch according to the present invention;

[0032] Figure 3 It is a schematic flow chart of a second embodiment of the silicone oil clutch fan diagnostic method of the present invention;

[0033] Figure 4 It is a flow chart of a third embodiment of the silicone oil clutch fan diagnostic method of the present invention;

[0034] Figure 5This is a schematic diagram of the functional modules of an embodiment of a silicone oil clutch fan diagnostic device of the present invention. DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] In a first aspect, an embodiment of the present invention provides a silicone oil clutch fan diagnostic device.

[0037] Reference Figure 1 , Figure 1 The hardware structure diagram of the silicone oil clutch fan diagnostic device involved in the embodiment of the present invention. In the embodiment of the present invention, the silicone oil clutch fan diagnostic device may include a processor 1001 (such as a central processing unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a wireless interface (such as wireless fidelity WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), such as a disk storage, and the memory 1005 may optionally be a storage device independent of the aforementioned processor 1001. Those skilled in the art will understand that Figure 1 The hardware structure shown in the figure does not constitute a limitation of the present invention, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0038] Continue to refer to Figure 1 , Figure 1 The memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a silicone oil clutch fan diagnostic program.

[0039] The processor 1001 may call the silicone oil clutch fan diagnostic program stored in the memory 1005 and perform the following steps:

[0040] In each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty, record a first cumulative duration during which the silicone oil clutch fan driving duty cycle is equal to zero, and a second cumulative duration and a continuous duration during which the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero;

[0041] Detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time;

[0042] If the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0043] Further, in one embodiment, the processor 1001 may call the silicone oil clutch fan diagnostic program stored in the memory 1005, and further perform the following steps:

[0044] When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold;

[0045] If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

[0046] Further, in one embodiment, the processor 1001 may call the silicone oil clutch fan diagnostic program stored in the memory 1005, and further perform the following steps:

[0047] If the quotient of the second accumulated time divided by the first accumulated time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged.

[0048] Further, in one embodiment, the processor 1001 may call the silicone oil clutch fan diagnostic program stored in the memory 1005, and further perform the following steps:

[0049] When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0050] Furthermore, in one embodiment, when the engine is stopped and / or the silicone oil clutch fan speed sensor fails, the timers corresponding to the first accumulated time, the second accumulated time, and the continuous time stop timing.

[0051] In a second aspect, an embodiment of the present invention provides a method for diagnosing a silicone oil clutch fan.

[0052] In one embodiment, referring to Figure 2 , Figure 2 FIG. 1 is a flow chart of the first embodiment of the fan diagnosis method of the present invention. Figure 2 As shown, the silicone oil clutch fan diagnostic method includes:

[0053] Step S10, in each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty, record a first accumulated time when the silicone oil clutch fan driving duty cycle is equal to zero, and a second accumulated time and continuous time when the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero;

[0054] In this embodiment, a driving cycle is formed by engine starting, vehicle running, engine stopping, and the process from engine stopping to the next engine starting. In each driving cycle, under the premise that the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor has no faults, the first cumulative duration of the silicone oil clutch fan duty cycle being equal to zero is recorded, that is, when the silicone oil clutch fan drive duty cycle is equal to zero, timer 1 starts timing, when the silicone oil clutch fan drive duty cycle is not equal to zero, timer 1 stops timing, and when the silicone oil clutch fan drive duty cycle is equal to zero, timer 1 continues timing, and the duration recorded by timer 1 is the first cumulative duration T1 of the silicone oil clutch fan drive duty cycle being equal to zero.

[0055] In each driving cycle, under the premise that the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor is fault-free, the second cumulative duration of the silicone oil clutch fan speed being lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan drive duty cycle is equal to zero is recorded, that is, when the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is lower than the fan full separation speed, timer 2 starts timing, when the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is not lower than the fan full separation speed, timer 2 stops timing, when the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is lower than the fan full separation speed, timer 2 continues timing, and the duration recorded by timer 2 is the second cumulative duration T2 when the silicone oil clutch fan drive duty cycle is equal to zero. It is easy to understand that the cumulative duration is the superposition duration.

[0056] In each driving cycle, under the premise that the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor is not faulty, the continuous duration of the silicone oil clutch fan speed lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan drive duty ratio is equal to zero is recorded, that is, when the silicone oil clutch fan drive duty ratio is equal to zero and the silicone oil clutch fan speed is continuously lower than the fan full separation speed, when the fan drive duty ratio is equal to zero and the silicone oil clutch fan speed is not lower than the fan full separation speed, timer 3 stops timing, and when the silicone oil clutch fan drive duty ratio is equal to zero and the silicone oil clutch fan speed is lower than the fan full separation speed, timer 3 is reset to zero and then restarts timing, that is, starts timing from zero, and the duration recorded by timer 3 is the continuous duration T3 of the silicone oil clutch fan speed lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan drive duty ratio is equal to zero. Among them, in each driving cycle, after timer 1, timer 2 and timer 3 are reset to zero, the first cumulative duration, the second cumulative duration and the continuous duration are recorded from zero.

[0057] Furthermore, in each driving cycle, when the vehicle is powered off or the first accumulated duration T1 is equal to the first threshold or the continuous duration T3 is equal to the second threshold, timer 1, timer 2 and timer 3 stop timing to reduce the power consumption of the engine controller.

[0058] Step S20, detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time;

[0059] In this embodiment, after obtaining the first cumulative time T1, the second cumulative time T2 and the continuous time T3, it can be detected whether the silicone oil clutch fan can be disengaged based on the first cumulative time T1, the second cumulative time T2 and the continuous time T3.

[0060] Step S30: If the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0061] In this embodiment, taking N as 3 as an example, if the detection results corresponding to three consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output for relevant personnel to check the silicone oil clutch fan. According to the national standard GB17691-2018, a driving cycle is defined as a continuous process consisting of engine starting, vehicle running, engine shutdown, and the time from engine shutdown to the next engine start, and N is a positive integer.

[0062] Furthermore, if the detection result corresponding to a driving cycle is that the silicone oil clutch fan cannot be disengaged, and the detection result corresponding to the next driving cycle is that the fan can be disengaged, the silicone oil clutch fan fault reminder is not output, and the detection results corresponding to the subsequent driving cycles continue to be obtained.

[0063] In this embodiment, in each driving cycle, when the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor has no faults, the first cumulative time when the silicone oil clutch fan drive duty cycle is equal to zero, and the second cumulative time and continuous time when the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed are recorded; whether the silicone oil clutch fan can be disengaged is detected according to the first cumulative time, the second cumulative time and the continuous time; if the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process of engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer. Through this embodiment, in each driving cycle, when the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor has no faults, it is possible to detect whether the silicone oil clutch fan can be disengaged based on the first accumulated time when the silicone oil clutch fan drive duty cycle is equal to zero, and the second accumulated time and continuous time when the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed. If the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output to improve the accuracy of the output result. At the same time, a technical solution that can determine whether the silicone oil clutch fan can be disengaged is provided, which solves the problem that the prior art cannot determine whether the silicone oil clutch fan can be disengaged.

[0064] Further, in one embodiment, referring to Figure 3 , Figure 3 FIG. 2 is a flow chart of a second embodiment of the silicone oil clutch fan diagnostic method of the present invention. Figure 3 As shown, step S20 includes:

[0065] Step S201, when the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold;

[0066] Step S202: If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

[0067] In this embodiment, when the first accumulated duration T1 is equal to the first threshold and the continuous duration T3 is less than the second threshold, it is detected whether the quotient of the second accumulated duration T2 divided by the first accumulated duration T1 is less than the third threshold, wherein the first threshold is greater than the second threshold.

[0068] Specifically, taking the first threshold of 60 minutes and the second threshold of 20 minutes as an example, when the silicone oil clutch fan drive duty cycle is zero, timer 1 starts timing, and when the silicone oil clutch fan drive duty cycle is zero, the silicone oil clutch fan drive duty cycle is zero and the silicone oil clutch fan speed is also lower than the silicone oil clutch fan full separation speed, then timer 2 and timer 3 also start timing. After 15 minutes, if the silicone oil clutch fan drive duty cycle is zero and the silicone oil clutch fan speed is not lower than the silicone oil clutch fan full separation speed, then timer 2 and timer 3 stop timing. The time length recorded by timer 1, timer 2 and timer 3 is 15 minutes. Timer 1 does not stop timing. If after 35 minutes, the silicone oil clutch fan drive The duty cycle is zero and the silicone oil clutch fan speed is lower than the full separation speed of the silicone oil clutch fan. At this time, the duration recorded by timer 1 is 50 minutes, and timer 2 continues to start timing. After timer 3 is reset to zero, it starts timing from zero. After 10 minutes, if the silicone oil clutch fan drive duty cycle is zero and the silicone oil clutch fan speed is not lower than the full separation speed of the fan, at this time, the duration recorded by timer 1, that is, the first cumulative duration T1 is 60 minutes, the duration recorded by timer 2, that is, the second cumulative duration T2 is 25 minutes, and the duration recorded by timer 3, that is, the continuous duration T3 is 10 minutes. At this time, the first cumulative duration T1 is equal to the first threshold value of 60 minutes, and the continuous duration T3 is less than the second threshold value of 20 minutes.

[0069] If the silicone oil clutch fan is disengaged briefly each time, when the first cumulative duration is equal to the first threshold and the continuous duration is less than the second threshold, it is detected whether the quotient of the second cumulative duration T225min divided by the first cumulative duration T160min is less than the third threshold. If the quotient of the second cumulative duration T2 divided by the first cumulative duration T1 is less than the third threshold, the detection result corresponding to this driving cycle is that the silicone oil clutch fan cannot be disengaged. It is easy to imagine that the parameters in this embodiment are for reference only and are not limited here.

[0070] Further, in one embodiment, continue to refer to Figure 3 , after the step of detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, comprising:

[0071] Step S203: If the quotient of the second accumulated time divided by the first accumulated time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged.

[0072] In this embodiment, when the vehicle stops for a short time and waits, if the silicone oil clutch fan is briefly disengaged, that is, the silicone oil clutch fan drive duty cycle is equal to zero, and the silicone oil clutch fan speed is continuously lower than the silicone oil clutch fan full disengagement speed for a time T3 that is less than the second threshold, and the fan is briefly disengaged each time, then when the first cumulative time is equal to the first threshold and the continuous time is less than the second threshold, if the quotient of the second cumulative time T2 divided by the first cumulative time T1 is greater than or equal to the third threshold, then the detection result corresponding to this driving cycle is that the fan can be disengaged.

[0073] Further, in one embodiment, referring to Figure 4 , Figure 4 FIG. 2 is a flow chart of a third embodiment of the silicone oil clutch fan diagnostic method of the present invention. Figure 4 As shown, step S20 includes:

[0074] Step S204, when the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0075] In this embodiment, when the first accumulated time T1 is less than the first threshold and the continuous time T3 is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0076] Specifically, taking the first threshold of 60min and the second threshold of 20min as an example, when the silicone oil clutch fan drive duty cycle is equal to zero, timer 1 starts timing. When the silicone oil clutch fan drive duty cycle is equal to zero, the silicone oil clutch fan drive duty cycle is equal to zero and the silicone oil clutch fan speed is also lower than the silicone oil clutch fan full separation speed, then timer 2 and timer 3 also start timing. After 20min, the duration recorded by timer 1, timer 2 and timer 3 is 20min. At this time, the first cumulative duration T120min recorded by timer 1 is less than the first threshold of 60min, and the continuous duration T320min recorded by timer 3 is equal to the second threshold of 20min. The detection result corresponding to this driving cycle is that the silicone oil clutch fan can be disengaged.

[0077] It is easy to imagine that after step S10, step S201 or step S204 is executed. That is, in each driving cycle, when the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor has no fault, the first cumulative time when the silicone oil clutch fan driving duty cycle is equal to zero, and the second cumulative time and continuous time when the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero are recorded. When the first cumulative time is equal to the first threshold and the continuous time is less than the second threshold, it is detected whether the quotient of the second cumulative time divided by the first cumulative time is less than the third threshold, wherein the first threshold is greater than the second threshold; if the quotient of the second cumulative time divided by the first cumulative time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged; if the quotient of the second cumulative time divided by the first cumulative time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged; if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process from engine starting, vehicle running, engine stopping, and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0078] Or, in each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor has no faults, the first cumulative time when the silicone oil clutch fan drive duty cycle is equal to zero, and the second cumulative time and continuous time when the silicone oil clutch fan drive duty cycle is equal to zero, when the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed, are recorded; when the first cumulative time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold; if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, the silicone oil clutch outputs a fan fault reminder, wherein the process from engine starting, vehicle running, engine stopping, and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0079] Furthermore, in a driving cycle, if the first accumulated time is less than the first threshold value and the continuous time is less than the second threshold value, the first accumulated time and the continuous time are invalid, and whether the silicone oil clutch fan can be disengaged is not detected based on the first accumulated time, the second accumulated time and the continuous time, so as to improve the accuracy of the detection result. In the next driving cycle, when the first accumulated time is equal to the first threshold value or the continuous time is equal to the second threshold value, whether the silicone oil clutch fan can be disengaged is detected based on the first accumulated time, the second accumulated time and the continuous time.

[0080] Furthermore, in one embodiment, when the engine is stopped and / or the silicone oil clutch fan speed sensor fails, the timers corresponding to the first accumulated time, the second accumulated time, and the continuous time stop timing.

[0081] In this embodiment, in each driving cycle, when the engine is stopped and / or the silicone oil clutch fan speed sensor fails, timer 1 recording the first cumulative time, timer 2 recording the second cumulative time, and timer 3 recording the continuous time stop timing. If the first cumulative time is less than the first threshold and the continuous time is less than the second threshold, the engine speed is greater than the preset speed and the silicone oil clutch fan speed sensor fault is repaired, the first cumulative time recorded by timer 1, the second cumulative time recorded by timer 2, and the continuous time recorded by timer 3 are reset to zero and then start timing from zero.

[0082] Furthermore, in each driving cycle, when the first accumulated duration is equal to the first threshold or the continuous duration is equal to the second threshold, regardless of whether the engine is stopped or whether the silicone oil clutch fan speed sensor is faulty, the timers corresponding to the first accumulated duration, the second accumulated duration and the continuous duration all stop timing.

[0083] In a third aspect, an embodiment of the present invention further provides a silicone oil clutch fan diagnostic device.

[0084] In one embodiment, referring to Figure 5 , Figure 5 Schematic diagram of the functional modules of an embodiment of the silicone oil clutch fan diagnostic device of the present invention. Figure 5 As shown, the silicone oil clutch fan diagnostic device includes:

[0085] The recording module 10 is used to record, in each driving cycle, a first accumulated time duration when the driving duty ratio of the silicone oil clutch fan is equal to zero, and a second accumulated time duration and a continuous time duration when the speed of the silicone oil clutch fan is lower than the full separation speed of the silicone oil clutch fan when the driving duty ratio of the silicone oil clutch fan is equal to zero when the engine speed is greater than a preset speed and the speed sensor of the silicone oil clutch fan is not faulty;

[0086] A detection module 20, used to detect whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time;

[0087] The output module 30 is used to output a silicone oil clutch fan fault reminder if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

[0088] Furthermore, in one embodiment, the detection module 20 is used to:

[0089] When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold;

[0090] If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

[0091] Furthermore, in one embodiment, the detection module 20 is further configured to:

[0092] If the quotient of the second accumulated time divided by the first accumulated time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged.

[0093] Furthermore, in one embodiment, the detection module 20 is further configured to:

[0094] When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

[0095] Furthermore, in one embodiment, when the engine is stopped and / or the silicone oil clutch fan speed sensor fails, the timers corresponding to the first accumulated time, the second accumulated time, and the continuous time stop timing.

[0096] Among them, the functional implementation of each module in the above-mentioned fan diagnostic device corresponds to the various steps in the above-mentioned silicone oil clutch fan diagnostic method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0097] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium.

[0098] The readable storage medium of the present invention stores a silicone oil clutch fan diagnostic program, wherein when the silicone oil clutch fan diagnostic program is executed by a processor, the steps of the silicone oil clutch fan diagnostic method as described above are implemented.

[0099] Among them, the method implemented when the silicone oil clutch fan diagnostic program is executed can refer to the various embodiments of the silicone oil clutch fan diagnostic method of the present invention, and will not be repeated here.

[0100] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0101] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0102] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0103] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present invention.

[0104] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for diagnosing a silicone oil clutch fan, characterized in that: The silicone oil clutch fan diagnostic method comprises: In each driving cycle, when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty, record a first cumulative duration during which the silicone oil clutch fan driving duty cycle is equal to zero, and a second cumulative duration and a continuous duration during which the silicone oil clutch fan speed is lower than the silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero; Detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time; If the detection results corresponding to N consecutive driving cycles are that the silicone oil clutch fan cannot be disengaged, a silicone oil clutch fan fault reminder is output, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

2. The silicone oil clutch fan diagnostic method according to claim 1, characterized in that: The step of detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time comprises: When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold; If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

3. The silicone oil clutch fan diagnostic method according to claim 2, characterized in that: After the step of detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, the method further includes: If the quotient of the second accumulated time divided by the first accumulated time is greater than or equal to the third threshold, the detection result is that the silicone oil clutch fan can be disengaged.

4. The silicone oil clutch fan diagnostic method according to claim 1, characterized in that: The step of detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time comprises: When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

5. The silicone oil clutch fan diagnostic method according to claim 1, characterized in that: When the engine stops and / or the silicone oil clutch fan speed sensor fails, the timers corresponding to the first accumulated time, the second accumulated time, and the continuous time stop timing.

6. A silicone oil clutch fan diagnostic device, characterized in that: The silicone oil clutch fan diagnostic device comprises: A recording module, for recording, in each driving cycle, a first accumulated time duration during which a silicone oil clutch fan driving duty cycle is equal to zero, and a second accumulated time duration and a continuous time duration during which a silicone oil clutch fan speed is lower than a silicone oil clutch fan full separation speed when the silicone oil clutch fan driving duty cycle is equal to zero when the engine speed is greater than a preset speed and the silicone oil clutch fan speed sensor is not faulty; A detection module, used for detecting whether the silicone oil clutch fan can be disengaged according to the first accumulated time, the second accumulated time and the continuous time; The output module is used to output a silicone oil clutch fan fault reminder if the detection result corresponding to N consecutive driving cycles is that the silicone oil clutch fan cannot be disengaged, wherein the process from engine starting, vehicle running, engine stopping and from engine stopping to the next engine starting is a driving cycle, and N is a positive integer.

7. The silicone oil clutch fan diagnostic device according to claim 6, characterized in that: The detection module is used for: When the first accumulated duration is equal to the first threshold and the continuous duration is less than the second threshold, detecting whether the quotient of the second accumulated duration divided by the first accumulated duration is less than a third threshold, wherein the first threshold is greater than the second threshold; If the quotient of the second accumulated time divided by the first accumulated time is less than the third threshold, the detection result is that the silicone oil clutch fan cannot be disengaged.

8. The silicone oil clutch fan diagnostic device according to claim 6, characterized in that: The detection module is further used for: When the first accumulated time is less than the first threshold and the continuous time is equal to the second threshold, the detection result is that the silicone oil clutch fan can be disengaged, wherein the first threshold is greater than the second threshold.

9. A silicone oil clutch fan diagnostic device, characterized in that: The silicone oil clutch fan diagnostic device includes a processor, a memory, and a fan diagnostic program stored in the memory and executable by the processor, wherein when the silicone oil clutch fan diagnostic program is executed by the processor, the steps of the silicone oil clutch fan diagnostic method as described in any one of claims 1 to 5 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a silicone oil clutch fan diagnostic program, wherein when the silicone oil clutch fan diagnostic program is executed by a processor, the steps of the silicone oil clutch fan diagnostic method according to any one of claims 1 to 5 are implemented.

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