High-power automatic gearbox expansion conversion control device, module and equipment

Abstract

The embodiment of the invention relates to the field of electrical control, and provides a high-power automatic gearbox expansion conversion control device, module and equipment, the high-power automatic gearbox expansion conversion control device comprises a power supply circuit, a main control circuit, a CAN communication circuit, a signal input circuit, a signal output circuit and a signal output short circuit detection circuit, the master control circuit is connected with the communication circuit, the signal input circuit, the signal output circuit and the signal output short circuit detection circuit, and the power supply circuit supplies power to the master control circuit, the CAN communication circuit, the signal input circuit, the signal output circuit and the signal output short circuit detection circuit. Information between the CAN bus and the automatic gearbox electric control system can be transmitted through the large-power automatic gearbox expansion conversion control device, part of input and output information does not need to be shielded, and the reliability of the gearbox electric control system is improved.

Description

Technical Field

[0001] The present application relates to the field of electrical control technology, and in particular to a high-power automatic transmission expansion conversion control device, module and equipment. Background Art

[0002] High-power hydraulic automatic transmission is a product that integrates mechanical, electrical and hydraulic functions. It has a complex system and high integration, and is mainly used in wheeled special vehicles. As an important part of the automatic transmission, the electronic control system is responsible for controlling the opening and closing of the valve body and oil channels inside the transmission, thereby realizing the gear shifting of the transmission; the transmission electronic control system exchanges information with the vehicle and the engine to make correct judgments on the timing of the transmission shifting.

[0003] At present, the information data of the automatic transmission electronic control system can only interact with the whole vehicle through the CAN bus, and it does not have hard-wired input and output functions. When faced with the situation where the vehicle's electrical integration is low and the information cannot all go through the bus, it is often necessary to shield part of the input and output information. This will cause the transmission electronic control system to lose its protection function for the transmission mechanical structure and driver and passengers, reducing the reliability of the transmission electronic control system. Summary of the invention

[0004] The embodiments of the present application provide a high-power automatic transmission expansion conversion control device, module and equipment, which can transmit information between the CAN bus and the automatic transmission electronic control system through the high-power automatic transmission expansion conversion control device, without shielding part of the input and output information, thereby improving the reliability of the transmission electronic control system.

[0005] A first aspect of an embodiment of the present application provides a high-power automatic transmission expansion conversion control device, characterized in that the high-power automatic transmission expansion conversion control device comprises: a power supply circuit, a main control circuit, a CAN communication circuit, a signal input circuit, a signal output circuit, and a signal output short-circuit detection circuit, wherein the main control circuit is connected to the communication circuit, the signal input circuit, the signal output circuit, and the signal output short-circuit detection circuit, and the power supply circuit supplies power to the main control circuit, the CAN communication circuit, the signal input circuit, the signal output circuit, and the signal output short-circuit detection circuit, wherein:

[0006] The main control circuit is used to transmit information data of the automatic transmission electronic control system and control instructions sent by the CAN bus through the CAN communication circuit and the CAN bus;

[0007] The main control circuit is used to detect whether there is a short circuit in the signal output circuit through the signal output short circuit detection circuit;

[0008] The main control circuit is used to receive information data of the automatic transmission electronic control system through the signal input circuit;

[0009] The main control circuit is used for the signal output circuit to send the control instructions received from the CAN bus to the automatic transmission electronic control system.

[0010] In a possible implementation, the signal input circuit, the signal output circuit, and the signal output short-circuit detection circuit use an optocoupler isolation circuit for isolation protection and anti-interference processing.

[0011] In a possible implementation, the signal input circuit includes 8 signal input ports, and the signal output circuit includes 8 signal output ports.

[0012] In a possible implementation, the main control circuit is specifically used for:

[0013] receiving a detection signal when the signal output short-circuit detection circuit detects the signal output circuit;

[0014] It is determined whether the signal output circuit has a short circuit according to the detection signal.

[0015] In a possible implementation, after the signal output short circuit detection circuit detects whether the signal output circuit is short-circuited, the main control circuit is further configured to:

[0016] Determine the abnormal factor of the short circuit of the signal output circuit according to the detection signal;

[0017] The abnormal factors and the state information of the signal output circuit being in a short circuit are transmitted to the CAN bus through the CAN communication circuit.

[0018] In a possible implementation, the main control circuit is further used for:

[0019] When it is detected that the current CAN bus is in an abnormal state, information is transmitted between the CAN communication circuit and the redundant CAN bus.

[0020] In a possible implementation, the baud rate of the CAN communication circuit and the redundant CAN bus during communication is 250 kbps, and the transmission period is 50 ms.

[0021] In one possible implementation, the power supply circuit includes a filtering module, a voltage stabilizing module and a protection module, wherein the output end of the voltage stabilizing module is connected to the input end of the filtering module, the protection module is arranged between the voltage stabilizing module and the filtering module, and the protection module is used to perform overvoltage protection and overcurrent protection on the power supply circuit.

[0022] A second aspect of an embodiment of the present application provides a high-power automatic transmission expansion conversion control module, comprising a circuit board and a high-power automatic transmission expansion conversion control device as described in any one of the first aspects, wherein the high-power automatic transmission expansion conversion control device is arranged on the circuit board.

[0023] A third aspect of an embodiment of the present application provides a high-power automatic transmission expansion conversion control device, comprising a shell and a high-power automatic transmission expansion conversion control module as described in the second aspect, wherein the high-power automatic transmission expansion conversion control module is arranged inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art 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 paying creative work.

[0025] Figure 1 A structural schematic diagram of a high-power automatic transmission expansion conversion control device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0028] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0029] In order to better understand the high-power automatic transmission expansion conversion control device provided in the embodiment of the present application, the following first briefly introduces the scenarios in which the high-power automatic transmission expansion conversion control device is applied. The high-power automatic transmission expansion conversion control device can be used for information exchange and transmission between the automatic transmission electronic control system and the vehicle control system. The high-power hydraulic automatic transmission is a product that integrates mechanical, electrical and hydraulic systems. It has a complex system and a high degree of integration. It is mainly used in wheeled special vehicles. As an important component of the automatic transmission, the electronic control system is responsible for controlling the opening and closing of the valve body and oil channels inside the transmission, thereby realizing the gear shifting of the transmission; the transmission electronic control system exchanges information with the vehicle and the engine to make correct judgments on the timing of the transmission shift.

[0030] At present, the information data of the automatic transmission electronic control system can only interact with the whole vehicle through the CAN bus, and it does not have hard-wired input and output functions. When faced with the situation where the vehicle's electrical integration is low and the information cannot all go through the bus, it is often necessary to shield part of the input and output information. This will cause the transmission electronic control system to lose its protection function for the transmission mechanical structure and driver and passengers, reducing the reliability of the transmission electronic control system.

[0031] In order to solve the above-mentioned problems, the present application provides a high-power automatic transmission expansion conversion control device. Therefore, the information between the CAN bus and the automatic transmission electronic control system can be transmitted through the high-power automatic transmission expansion conversion control device, without shielding part of the input and output information, thereby improving the reliability of the transmission electronic control system.

[0032] See also Figure 1 , Figure 1 The present invention provides a schematic diagram of a high-power automatic transmission expansion conversion control device. Figure 1 As shown, the device includes: a power supply circuit 1, a main control circuit 2, a CAN communication circuit 3, a signal input circuit 4, a signal output circuit 5, and a signal output short-circuit detection circuit 6. The main control circuit 2 is connected to the communication circuit, the signal input circuit 4, the signal output circuit 5, and the signal output short-circuit detection circuit 6. The power supply circuit 1 supplies power to the main control circuit 2, the CAN communication circuit 3, the signal input circuit 4, the signal output circuit 5, and the signal output short-circuit detection circuit 6, wherein:

[0033] The main control circuit 2 is used to transmit information data of the automatic transmission electronic control system and control instructions sent by the CAN bus through the CAN communication circuit 3 and the CAN bus;

[0034] The main control circuit is used to detect whether the signal output circuit 5 is short-circuited through the signal output short-circuit detection circuit 6;

[0035] The main control circuit 2 is used to receive information data of the automatic transmission electronic control system through the signal input circuit 4;

[0036] The main control circuit 2 is used for the signal output circuit 5 to send the control instructions received from the CAN bus to the automatic transmission electronic control system.

[0037] In a possible implementation, the signal input circuit 4 , the signal output circuit 5 , and the signal output short-circuit detection circuit 6 use an optical coupling isolation circuit for isolation protection and anti-interference processing.

[0038] The high-power automatic transmission expansion conversion control device has built-in 8-way input (6-way switch input, 2-way analog input), 8-way output (4-way relay output, 4-way switch output), and has rich input and output for the matching vehicle model. In view of the possible failure of the CAN network, the converter supports dual-channel redundant CAN bus. When one channel fails, the other CAN network can be used for communication. There are switch output and relay drive diagnostic channels (4 channels each). When the output channel is overloaded or short-circuited, real-time error prompts can be given through the CAN network to facilitate subsequent troubleshooting.

[0039] Specifically, the internal circuit board of the high-power automatic transmission expansion conversion control device adopts a multi-layer board design. Compared with a single-layer circuit board, while achieving the same function, the multi-layer board is smaller in size, which can reduce the volume of the metal protective shell and achieve the purpose of miniaturization and lightweight.

[0040] In a possible implementation, the signal input circuit 4 includes 8 signal input ports, and the signal output circuit 5 includes 8 signal output ports.

[0041] In a possible implementation, the main control circuit 2 is specifically used for:

[0042] A detection signal is received when the signal output short-circuit detection circuit 6 detects the signal output circuit 5; and whether the signal output circuit 5 is short-circuited is determined according to the detection signal.

[0043] Specifically, the judgment can be made based on the signal level value in the detection signal. If it is a high level, it is considered that a short circuit exists; if it is a low level, it is considered that no short circuit exists.

[0044] In a possible implementation, after the signal output short circuit detection circuit 6 detects whether the signal output circuit 5 is short-circuited, the main control circuit 2 is further configured to:

[0045] The abnormal factor of the short circuit of the signal output circuit 5 is determined according to the detection signal; the abnormal factor and the state information of the short circuit of the signal output circuit 5 are transmitted to the CAN bus through the CAN communication circuit 3.

[0046] Among them, the detection signal can be subjected to waveform recognition to obtain the waveform type, and the abnormal factor can be obtained according to the waveform type. Since the waveform of the detection signal caused by different abnormalities will be different, the abnormal factor can be determined according to the waveform type. A general waveform recognition method can be used to perform waveform recognition on the detection signal to obtain the waveform type. After the CAN bus receives the abnormal factor and the state information that the signal output circuit 5 is in a short circuit, it sends it to the vehicle control module according to its corresponding destination address for subsequent processing.

[0047] In a possible implementation, the main control circuit 2 is further used for:

[0048] When it is detected that the current CAN bus is in an abnormal state, information is transmitted between the CAN communication circuit 3 and the redundant CAN bus.

[0049] Specifically, in response to possible failure of the CAN network, the high-power automatic transmission expansion conversion control device supports dual-channel redundant CAN buses. When one channel fails, the other CAN network can be used to achieve communication.

[0050] In a possible implementation, the baud rate of the CAN communication circuit 3 and the redundant CAN bus during communication is 250 kbps, the sending period is 50 ms, and the sending flag and receiving flag are set to 0x500 and 0x501 respectively.

[0051] In one possible implementation, the power supply circuit 1 includes a filtering module, a voltage stabilizing module and a protection module, wherein the output end of the voltage stabilizing module is connected to the input end of the filtering module, the protection module is arranged between the voltage stabilizing module and the filtering module, and the protection module is used to perform overvoltage protection and overcurrent protection on the power supply circuit 1.

[0052] In a specific implementation, the present application embodiment provides another specific solution of a high-power automatic transmission expansion conversion control device, which is as follows:

[0053] The main control circuit 2 uses a purely domestically produced 32-bit main chip. The signal acquisition circuit, signal output circuit 5, and signal output short-circuit detection circuit 6 all use optical couplers for isolation protection and anti-interference processing. The CAN communication circuit 3 sends data to the CAN bus and receives control instructions.

[0054] Under the premise of not increasing the load rate of the vehicle power CAN network bus, the high-power automatic transmission expansion conversion control device has a built-in 120-ohm resistor and innovatively uses the internal CAN network to interact with the TCU (Telematics Control Unit). The CAN communication message is customized, the baud rate is 250kbps, the transmission cycle is 50ms, and the sending and receiving IDs are set to 0x500 and 0x501 to realize the information interaction between the converter and the TCU.

[0055] The high-power automatic transmission expansion conversion control device has built-in 8-way input (6-way switch input, 2-way analog input), 8-way output (4-way relay output, 4-way switch output), and has rich input and output for the matching vehicle model. In view of the possible failure of the CAN network, the high-power automatic transmission expansion conversion control device supports dual-channel redundant CAN bus. When one channel fails, the other CAN network can be used for communication. There are switch output and relay drive diagnostic channels (4 channels each). When the output channel is overloaded or short-circuited, real-time error prompts can be given through the CAN network to facilitate subsequent troubleshooting.

[0056] The internal circuit board of the high-power automatic transmission expansion conversion control device adopts a multi-layer board design. Compared with a single-layer circuit board, while achieving the same function, the multi-layer board is smaller in size, which can reduce the volume of the metal protective shell and achieve the purpose of miniaturization and lightweight.

[0057] Through the development of the automatic transmission expansion conversion controller, the automatic transmission electronic control system is more perfect, which can not only meet the output of the CAN bus, but also meet the input and output of hard-line signals. When the matching vehicle model does not have the CAN bus communication capability, the expansion conversion controller can be used to achieve the conversion between the CAN bus and the hard line, thus improving the compatibility of the automatic transmission electronic control system.

[0058] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0059] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A high-power automatic transmission expansion conversion control device, characterized in that: The high-power automatic transmission expansion conversion control device includes: a power supply circuit, a main control circuit, a CAN communication circuit, a signal input circuit, a signal output circuit, and a signal output short-circuit detection circuit. The main control circuit is connected to the communication circuit, the signal input circuit, the signal output circuit, and the signal output short-circuit detection circuit. The power supply circuit supplies power to the main control circuit, the CAN communication circuit, the signal input circuit, the signal output circuit, and the signal output short-circuit detection circuit. The main control circuit is used to transmit information data of the automatic transmission electronic control system and control instructions sent by the CAN bus through the CAN communication circuit and the CAN bus; The main control circuit is used to detect whether there is a short circuit in the signal output circuit through the signal output short circuit detection circuit; The main control circuit is used to receive information data of the automatic transmission electronic control system through the signal input circuit; The main control circuit is used for the signal output circuit to send the control instructions received from the CAN bus to the automatic transmission electronic control system.

2. The high-power automatic transmission expansion conversion control device according to claim 1 is characterized in that: The signal input circuit, the signal output circuit and the signal output short-circuit detection circuit adopt an optical coupling isolation circuit for isolation protection and anti-interference processing.

3. The high-power automatic transmission expansion conversion control device according to claim 2 is characterized in that: The signal input circuit includes 8 signal input ports, and the signal output circuit includes 8 signal output ports.

4. The high-power automatic transmission expansion conversion control device according to claim 3 is characterized in that: The main control circuit is specifically used for: receiving a detection signal when the signal output short-circuit detection circuit detects the signal output circuit; It is determined whether the signal output circuit has a short circuit according to the detection signal.

5. The high-power automatic transmission expansion conversion control device according to claim 4 is characterized in that: After the signal output short circuit detection circuit detects whether the signal output circuit is short-circuited, the main control circuit is further used to: Determine the abnormal factor of the short circuit of the signal output circuit according to the detection signal; The abnormal factors and the state information of the signal output circuit being in a short circuit are transmitted to the CAN bus through the CAN communication circuit.

6. The high-power automatic transmission expansion conversion control device according to claim 5, characterized in that: The main control circuit is also used for: When it is detected that the current CAN bus is in an abnormal state, information is transmitted between the CAN communication circuit and the redundant CAN bus.

7. The high-power automatic transmission expansion conversion control device according to any one of claims 1 to 6, characterized in that: The baud rate of the CAN communication circuit and the redundant CAN bus when communicating is 250 kbps, and the sending period is 50 ms.

8. The high-power automatic transmission expansion conversion control device according to claim 7 is characterized in that: The power supply circuit includes a filtering module, a voltage stabilizing module and a protection module, wherein the output end of the voltage stabilizing module is connected to the input end of the filtering module, the protection module is arranged between the voltage stabilizing module and the filtering module, and the protection module is used to perform overvoltage protection and overcurrent protection on the power supply circuit.

9. A high-power automatic transmission expansion conversion control module, characterized in that: It comprises a circuit board and a high-power automatic transmission expansion conversion control device as described in any one of claims 1 to 8, wherein the high-power automatic transmission expansion conversion control device is arranged on the circuit board.

10. A high-power automatic transmission expansion conversion control device, characterized in that: It comprises a housing and a high-power automatic transmission expansion conversion control module as claimed in claim 9, wherein the high-power automatic transmission expansion conversion control module is arranged inside the housing.

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