CN111660962A - Transfer case ablation prevention early warning method and device and four-wheel drive vehicle - Google Patents
Transfer case ablation prevention early warning method and device and four-wheel drive vehicle Download PDFInfo
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- CN111660962A CN111660962A CN202010605926.9A CN202010605926A CN111660962A CN 111660962 A CN111660962 A CN 111660962A CN 202010605926 A CN202010605926 A CN 202010605926A CN 111660962 A CN111660962 A CN 111660962A
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- 238000012546 transfer Methods 0.000 title claims abstract description 39
- 238000002679 ablation Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000002265 prevention Effects 0.000 title claims description 9
- 235000019239 indanthrene blue RS Nutrition 0.000 claims description 4
- UHOKSCJSTAHBSO-UHFFFAOYSA-N indanthrone blue Chemical compound C1=CC=C2C(=O)C3=CC=C4NC5=C6C(=O)C7=CC=CC=C7C(=O)C6=CC=C5NC4=C3C(=O)C2=C1 UHOKSCJSTAHBSO-UHFFFAOYSA-N 0.000 claims description 4
- 238000013021 overheating Methods 0.000 description 10
- 230000001960 triggered effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
The invention provides an anti-ablation early warning method and device for a transfer case and a four-wheel drive vehicle system. The method comprises the following steps: calculating the percentage of the measured disc temperature signal in the maximum value of the disc temperature signal; calculating the percentage of the measured oil temperature signal in the maximum value of the oil temperature signal; looking up a table according to the two percentages to obtain corresponding color values; and displaying the corresponding color value. The invention provides a transfer case anti-ablation early warning method and device and a four-wheel drive vehicle, which can enable a driver to know the approximate temperature range of a four-wheel drive component of the driver under any condition.
Description
Technical Field
The invention relates to the technical field of four-wheel drive vehicle control, in particular to an anti-ablation early warning method and device for a transfer case and a four-wheel drive vehicle.
Background
The four-wheel drive transfer case is mainly used for a rear-wheel drive type device for transferring the torque of a rear axle to a front axle, the torque is transferred mainly through different pressing forces of friction plates at present, when relative sliding occurs in the friction plates, the friction plates generate heat, if the heat is generated excessively, the phenomenon of friction plate ablation can occur, meanwhile, special oil is arranged inside the transfer case and used for lubricating and helping the friction plates to dissipate heat, and if the temperature of the oil is too high, the friction plates can be ablated.
When the estimated friction plate temperature or oil temperature exceeds a certain threshold value, an overheating signal ThermalShutdown is triggered to be True. The signal meter can receive and then trigger the alarm signal of the meter to remind a driver of not excessively using the four-wheel drive and needing to stop for inspection.
Since the signal is that the friction plate or oil has been overheated, the thermal shutdown will show that, in fact, the friction plate has been worn to some extent, the four-wheel drive performance will also be degraded, and meanwhile, the driver does not know when the four-wheel drive will be overheated, and does not know whether the current driving condition will cause the four-wheel drive part to be overheated or not, and will cause ablation.
Disclosure of Invention
The invention aims to provide a transfer case anti-ablation early warning method, a transfer case anti-ablation early warning device and a four-wheel drive vehicle, so that a driver can know the approximate temperature range of the four-wheel drive component under any condition.
In order to solve the technical problem, the invention provides an anti-ablation early warning method for a transfer case, which comprises the following steps: calculating the percentage of the measured disc temperature signal in the maximum value of the disc temperature signal; calculating the percentage of the measured oil temperature signal in the maximum value of the oil temperature signal; looking up a table according to the two percentages to obtain corresponding color values; and displaying the corresponding color value.
In some embodiments, the table lookup is performed according to two percentages to obtain the corresponding color value, including: comparing the two percentages to obtain the larger of the two percentages as the table look-up percentage; and looking up the table by using the table look-up percentage to obtain the color value.
In some embodiments, the color values comprise: light blue, medium blue, bright blue, light blue, green, light green, yellow, orange, red.
In some embodiments, when the percentage of the lookup table takes on a value between 0 and 10%, the color value is light blue; when the value of the table look-up percentage is between 10% and 20%, the color value is medium blue; when the value of the table look-up percentage is between 20% and 30%, the color value is blue; when the value of the table look-up percentage is between 30% and 40%, the color value is bright blue; when the value of the table look-up percentage is between 40% and 50%, the color value is light blue; when the value of the table look-up percentage is between 50% and 60%, the color value is green; when the value of the table look-up percentage is between 60% and 70%, the color value is light green; when the value of the table look-up percentage is between 70% and 80%, the color value is yellow; when the table look-up percentage takes a value between 80% and 90%, the color value is orange; when the value of the table lookup percentage is between 90% and 100%, the color value is red.
In some embodiments, the maximum value of the disc temperature signal is 200.
In some embodiments, the maximum value of the oil temperature signal is 140.
In addition, the invention also provides an ablation-prevention early warning device of the transfer case, and the system comprises: one or more processors; storage means for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement a transfer case anti-ablation warning method in accordance with the foregoing.
In addition, the invention also provides a four-wheel drive vehicle which comprises the transfer case anti-ablation early warning device.
After adopting such design, the invention has at least the following advantages:
by the method, the current working temperature range of the four-wheel drive is displayed through different colors, whether the four-wheel drive is overheated due to the current operation of a driver is reminded in time, and the driver can expect the overheating psychologically, so that the four-wheel drive transfer case is protected, and the occurrence of friction plate ablation is reduced.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a flow chart of a transfer case ablation prevention early warning method provided by an embodiment of the invention;
fig. 2 is a structural diagram of an ablation-prevention early warning device of a transfer case provided by an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, the anti-ablation early warning method for the transfer case comprises the following steps:
and S11, calculating the percentage of the measured disc temperature signal to the maximum value of the disc temperature signal.
And S12, calculating the percentage of the measured oil temperature signal to the maximum value of the oil temperature signal.
And S13, performing table lookup according to the two percentages to obtain the corresponding color value.
And S14, displaying the corresponding color value.
In the control system, the temperatures of the friction disc and the oil temperature, respectively, are evaluated. Through a large number of experiments, the maximum temperature which can be borne by the friction disc is 200 ℃, and if the maximum temperature exceeds the maximum temperature, the friction disc is easy to ablate. The maximum temperature that the oil temperature can bear is 140 degrees, if the oil temperature exceedes this temperature, the fluid can go bad to lose original lubricated and heat dissipation's function, also easily lead to the phenomenon of friction disc ablation.
According to the setting of the maximum temperature, when any temperature reaches the corresponding maximum temperature, the temperature overheating alarm is triggered, so that the four-wheel drive function is temporarily lost, and then when the temperature is reduced, the four-wheel drive function is effective again. In the conventional project, after overheating occurs, namely ThermalShutdown is set to be 1, the meter can display the four-wheel drive overheating, a driver can know that the four-wheel drive is hot, and the slip between shafts needs to be reduced as much as possible.
The disc temperature signal ClutchPlateTemperature calculated by the control system is divided by its maximum value, i.e. 200, i.e. the percentage of disc overheating, and likewise the oil temperature clutchoiltermperature calculated by the control system is divided by its maximum value, i.e. 140, i.e. the percentage of oil overheating, when either of the two percentages reaches 100%, i.e. overheating is triggered, i.e. ThermalShutdown is set to 1. Wherein the algorithm is shown in figure 1.
By different percentages, the look-up table outputs different color values, i.e., TempColorMap, where blue indicates that the four-wheel-drive function is the strongest, green indicates that the four-wheel-drive function is in the neutral state, yellow indicates that the four-wheel-drive has started to gradually approach overheating, orange indicates that the four-wheel-drive is further approaching overheating, and red indicates that the four-wheel-drive is about to overheat, in hopes of the driver taking certain measures.
When the driver can clearly see the change of the color, the driver knows the state of the four-wheel drive, and a general driver can avoid orange and red areas intentionally, so that the four-wheel drive is not overheated easily, and the phenomenon of friction plate ablation is not easy to occur.
Fig. 2 shows the structure of the transfer case ablation-prevention early warning device. Referring to fig. 2, for example, the transfer case anti-ablation warning device 200 may be used as a warning host in a control system of a four-wheel drive vehicle. As described herein, the transfer case anti-ablation warning device 200 may be used to implement a warning function for ablation faults in a four-wheel drive vehicle control system. The transfer case anti-ablation warning apparatus 200 may be implemented in a single node, or the functions of the transfer case anti-ablation warning apparatus 200 may be implemented in a plurality of nodes in the network. Those skilled in the art will appreciate that the term transfer case anti-ablation warning device includes a broad sense of apparatus, of which the transfer case anti-ablation warning device 200 shown in fig. 2 is only one example. The transfer case anti-ablation early warning apparatus 200 is included for clarity and is not intended to limit the application of the present invention to a particular transfer case anti-ablation early warning apparatus embodiment or to a class of transfer case anti-ablation early warning apparatus embodiments. At least some of the features/methods described herein may be implemented in a network device or component, such as the transfer case anti-ablation pre-warning device 200. For example, the features/methods of the present invention may be implemented in hardware, firmware, and/or software running installed on hardware. The transfer case ablation prevention pre-warning apparatus 200 may be any device that processes, stores and/or forwards data frames through a network, such as a server, a client, a data source, and the like. As shown in fig. 2, the transfer case anti-ablation warning apparatus 200 may include a transceiver (Tx/Rx)210, which may be a transmitter, a receiver, or a combination thereof. Tx/Rx210 may be coupled to a plurality of ports 250 (e.g., an uplink interface and/or a downlink interface) for transmitting and/or receiving frames from other nodes. Processor 230 may be coupled to Tx/Rx210 to process frames and/or determine to which nodes to send frames. Processor 230 may include one or more multi-core processors and/or memory devices 232, which may serve as data stores, buffers, and the like. Processor 230 may be implemented as a general-purpose processor or may be part of one or more Application Specific Integrated Circuits (ASICs) and/or Digital Signal Processors (DSPs).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (8)
1. An anti-ablation early warning method for a transfer case is characterized by comprising the following steps:
calculating the percentage of the measured disc temperature signal in the maximum value of the disc temperature signal;
calculating the percentage of the measured oil temperature signal in the maximum value of the oil temperature signal;
looking up a table according to the two percentages to obtain corresponding color values;
and displaying the corresponding color value.
2. The transfer case ablation-prevention early warning method of claim 1, wherein a table is looked up according to two percentages to obtain corresponding color values, comprising:
comparing the two percentages to obtain the larger of the two percentages as the table look-up percentage;
and looking up the table by using the table look-up percentage to obtain the color value.
3. The transfer case ablation prevention early warning method of claim 2, wherein the color values comprise: light blue, medium blue, bright blue, light blue, green, light green, yellow, orange, red.
4. The transfer case ablation-prevention early warning method as claimed in claim 3, wherein when the table look-up percentage takes values between 0 and 10%, the color value is light blue; when the value of the table look-up percentage is between 10% and 20%, the color value is medium blue; when the value of the table look-up percentage is between 20% and 30%, the color value is blue; when the value of the table look-up percentage is between 30% and 40%, the color value is bright blue; when the value of the table look-up percentage is between 40% and 50%, the color value is light blue; when the value of the table look-up percentage is between 50% and 60%, the color value is green; when the value of the table look-up percentage is between 60% and 70%, the color value is light green; when the value of the table look-up percentage is between 70% and 80%, the color value is yellow; when the table look-up percentage takes a value between 80% and 90%, the color value is orange; when the value of the table lookup percentage is between 90% and 100%, the color value is red.
5. The transfer case ablation prevention early warning method as claimed in claim 1, wherein the maximum value of the disc temperature signal is 200.
6. The transfer case ablation prevention early warning method as claimed in claim 1, wherein a maximum value of the oil temperature signal is 140.
7. The utility model provides a transfer case ablation prevention early warning device which characterized in that includes:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the transfer case anti-ablation warning method of any of claims 1-6.
8. A four-wheel drive vehicle, comprising: the transfer case ablation prevention early warning device of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605926.9A CN111660962A (en) | 2020-06-29 | 2020-06-29 | Transfer case ablation prevention early warning method and device and four-wheel drive vehicle |
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| CN202010605926.9A CN111660962A (en) | 2020-06-29 | 2020-06-29 | Transfer case ablation prevention early warning method and device and four-wheel drive vehicle |
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| CN202010605926.9A Pending CN111660962A (en) | 2020-06-29 | 2020-06-29 | Transfer case ablation prevention early warning method and device and four-wheel drive vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114379530A (en) * | 2021-04-19 | 2022-04-22 | 长城汽车股份有限公司 | Transfer case overheat protection method and device and terminal equipment |
| CN114935002A (en) * | 2022-06-25 | 2022-08-23 | 北京博格华纳汽车传动器有限公司 | Overheating automatic gear shifting method, device, equipment and medium based on combined transfer case |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114379530A (en) * | 2021-04-19 | 2022-04-22 | 长城汽车股份有限公司 | Transfer case overheat protection method and device and terminal equipment |
| CN114379530B (en) * | 2021-04-19 | 2024-04-02 | 长城汽车股份有限公司 | Overheat protection method and device for transfer case and terminal equipment |
| CN114935002A (en) * | 2022-06-25 | 2022-08-23 | 北京博格华纳汽车传动器有限公司 | Overheating automatic gear shifting method, device, equipment and medium based on combined transfer case |
| CN114935002B (en) * | 2022-06-25 | 2024-06-21 | 北京博格华纳汽车传动器有限公司 | Overheat automatic gear shifting method, device, equipment and medium based on combined transfer case |
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