CN118128897A - Transmission control device, electronic control system and domain controller assembly - Google Patents
Transmission control device, electronic control system and domain controller assembly Download PDFInfo
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- CN118128897A CN118128897A CN202211540369.2A CN202211540369A CN118128897A CN 118128897 A CN118128897 A CN 118128897A CN 202211540369 A CN202211540369 A CN 202211540369A CN 118128897 A CN118128897 A CN 118128897A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 98
- 238000012544 monitoring process Methods 0.000 claims abstract description 33
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Abstract
The invention relates to a transmission control device, which comprises an input control unit, a main chip and an execution unit, wherein the input control unit comprises: a power input pin; a power supply output pin; the first monitoring module is used for monitoring whether a power supply signal from the vehicle-mounted power supply is larger than a first threshold value or not; and a feedback output pin for outputting a corresponding feedback signal according to a monitoring result of the first monitoring module, the main chip including a first input pin and a second input pin and configured to compare a power supply voltage received from the first input pin with a second threshold value, and when the voltage is less than the second threshold value, the main chip causing the transmission control device to enter an abnormal reset state and controlling a subsequent operation of the transmission control device based on the feedback signal received from the second input pin. The invention also relates to an electronic control system and domain controller assembly comprising the transmission control device.
Description
Technical Field
The present invention relates to the field of transmission control, and more particularly, to a transmission control device including an electronic control system and a domain controller assembly of the transmission control device.
Background
With the development of electronic information technology, more and more vehicle control functions realize electronic informatization. An automatic transmission control unit (Transmission Control Unit, abbreviated as "TCU") is one of the core control systems of a vehicle equipped with an automatic transmission. During travel of the vehicle, the TCU may collect and process various sensor signals describing the current vehicle travel state to control transmission gear as desired by the driver.
TCUs typically employ functional safety systems based on a three-level architecture (L1, L2, L3), where the L1 level is defined as the basic functional level, which relies on the input sensor signals to ensure that the correct shift strategy is implemented. The L2 level is defined as a functional safety level of the gearbox level for monitoring whether the functional safety target is violated, and all safety mechanisms for the functional safety target are implemented in the L2 level. The L3 stage is to monitor whether a problem has occurred inside the TCU itself, e.g., a watchdog hardware reset, which belongs to the TCU itself failing.
However, current TCUs may present false triggers of the L3 security level. That is, the TCU itself does not fail, but rather enables an L3 level dependent safety protection mechanism, which can adversely affect transmission control. Existing troubleshooting strategies require the addition of Boost circuitry to avoid such unnecessary L3 security level starts, which adds significant circuitry costs.
Disclosure of Invention
According to a first aspect of the present invention, there is provided a transmission control apparatus including an input control unit connected to a vehicle-mounted power supply to receive a power supply signal therefrom, a main chip configured to control the execution unit to execute a corresponding transmission control function based on an output signal of the input control unit, and an execution unit, wherein the input control unit includes:
the power input pin is connected with a vehicle-mounted power supply;
the power supply output pin is used for outputting corresponding power supply voltage according to the power supply signal received from the power supply input pin;
A first monitoring module configured to monitor whether a power signal from the vehicle-mounted power source is greater than a first threshold; and
A feedback output pin for outputting a corresponding feedback signal according to the monitoring result of the first monitoring module,
The main chip comprises a first input pin and a second input pin, the first input pin is connected to a power output pin of the input control unit, the second input pin is connected to a feedback output pin of the input control unit,
The master chip is configured to compare a supply voltage received from the first input pin with a second threshold, wherein when the supply voltage received from the first input pin is less than the second threshold, the master chip causes the transmission control device to enter an abnormal reset state and controls subsequent operation of the transmission control device based on a feedback signal received from the second input pin.
Advantageously, the main chip comprises a security management module, a reset module and a second monitoring module,
Wherein the security management module is configured to monitor a supply voltage provided by a power output pin of the input control unit and to send a reset instruction to the reset module when the supply voltage is monitored to be less than or equal to the second threshold,
The reset module is configured to store a site log relating to a current operating state of the transmission control device to the execution unit upon receipt of the reset instruction, and to put the transmission control device into an abnormal reset state, and
The second monitoring module is configured to monitor a feedback signal output from a feedback output pin of the input control unit and to control a subsequent operation of the transmission control device based on the feedback signal after the transmission control device enters an abnormal reset state.
Advantageously, the second monitoring module is further configured to release an abnormal reset state of the transmission control device when the low level signal is monitored, so that the transmission control device continues to perform the transmission control function when the power supply voltage is restored to normal.
Advantageously, the second monitoring module is further configured to send an interrupt instruction to the execution unit to control the execution unit to cut off transmission output when a high level signal is detected.
Advantageously, the transmission control device further comprises a shut-off path checking module for checking whether a safe shut-off path in the transmission control device is clear, and a valve control module for controlling the shut-off of a solenoid valve in an inverter,
Wherein the cut-off path inspection module is connected to the second monitoring module and configured to control the valve control module to perform a valve-off self-test procedure when the second monitoring module monitors that a feedback signal from a feedback output pin of the input control unit is restored from a low level to a high level.
Advantageously, the execution unit comprises a memory for storing a field log relating to a current operating state of the transmission control device, an abnormal reset cause and a test result relating to a safety cut-off path in the transmission control device.
Advantageously, the master chip is further configured to compare the supply voltage received from the first input pin with a third threshold value higher than the second threshold value, wherein the master chip brings the transmission control device into an abnormal reset state when the supply voltage received from the first input pin is greater than the third threshold value.
Advantageously, the execution unit is further configured to record the number of abnormal resets of the transmission control device and to permanently shut off the transmission output when the abnormal resets reach a predetermined number of times until the transmission control device is powered up again.
According to a second aspect of the present invention, there is also provided an electronic control system comprising:
a gearbox; and
The transmission control apparatus as described above.
According to a third aspect of the present invention there is also presented a domain controller assembly, advantageously comprising:
An engine control device;
A brake control device; and
The transmission control apparatus as described above.
The transmission control device according to the present invention can ensure accurate start-up of the L3 security mechanism without adding extra circuit cost, and without modification of the TCU platform and its existing software code. The transmission control device not only can reasonably control the vehicle gearbox, but also can save the manufacturing cost and the calculation workload of the TCU.
Drawings
Other features and advantages of the methods of the present invention will be apparent from, or are apparent from, the accompanying drawings, which are incorporated herein, and the detailed description of the invention, which, together with the drawings, serve to explain certain principles of the invention.
Fig. 1 shows a schematic circuit diagram of a transmission control apparatus according to an exemplary embodiment of the present invention.
Detailed Description
A transmission control apparatus according to the present invention will be described below by way of example with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Rather, the invention can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the various aspects, features, embodiments and advantages described below are for illustration only and should not be considered elements or limitations of the claims.
Fig. 1 shows a schematic circuit diagram of a transmission control apparatus according to an exemplary embodiment of the present invention. As shown in fig. 1, the transmission control apparatus (Transmission Control Unit, abbreviated as "TCU") includes an input control unit 10, a main chip 20, and an execution unit 30, wherein the input control unit 10 is connected to an on-vehicle power source (e.g., a 12V low-voltage power source of a vehicle) to receive a power source signal therefrom, and the main chip 20 is configured to control the execution unit 30 to execute a corresponding transmission control function, such as lifting a transmission gear, based on an output signal of the input control unit 10.
The input control unit 10 may specifically include a power input pin VBATIN, which is connected to a vehicle-mounted power supply; power output pins V5CU, V5REF for outputting corresponding power supply voltages according to the power signal received from the power input pin VBATIN; a first monitoring module 101 for monitoring whether a power supply signal from the vehicle-mounted power supply is greater than a first threshold; and a feedback output pin INTN, configured to output a corresponding feedback signal according to the monitoring result of the first monitoring module 101.
The main chip 20 may specifically include first input pins VEXT, VDDM connected to the power output pins V5CU, V5REF of the input control unit 10, respectively, and a second input pin P33.9 connected to the feedback output pin INTN of the input control unit 10. Two first input pins VEXT and VDDM are shown in fig. 1, it being understood that as a further example, the main chip 20 may also include only one of VEXT and VDDM, and correspondingly, the input control unit 10 may also include only a respective one of the power supply output pins V5CU and V5 REF.
The main chip 20 is configured to compare the supply voltage received from the first input pin with a second threshold, wherein when the supply voltage received from the first input pin is less than the second threshold (indicating that the external on-board power supply is not being supplied), the main chip 20 brings the transmission control device into an abnormal reset state and controls subsequent operation of the transmission control device based on the feedback signal received from the second input pin P33.9.
Specifically, the main chip 20 may include a security management module 201, a reset module 202, and a second monitoring module 203, wherein the security management module 201 is configured to monitor a supply voltage provided by the power output pins V5CU, V5REF of the input control unit 10, and send a reset instruction to the reset module 202 when the supply voltage is monitored to be less than or equal to a second threshold.
The reset module 202 is configured to store a site log regarding the current operating state of the transmission control device to the execution unit 30 upon receipt of a reset instruction and to bring the transmission control device into an abnormal reset state.
The second monitoring module 203 is configured to monitor a feedback signal output from the feedback output pin INTN of the input control unit 10 and to control subsequent operations of the transmission control device based on the feedback signal after the transmission control device enters an abnormal reset state.
Further, the second monitoring module 203 is further configured to release the abnormal reset state of the transmission control device when the low level signal is monitored, so that the transmission control device continues to perform the transmission control function when the power supply voltage is restored to normal.
Further, the second monitoring module 203 is further configured to send an interrupt instruction to the execution unit 30 to control the execution unit 30 to cut off the transmission output when the high level signal is monitored.
According to an alternative example, the transmission control device further comprises a cut-off path checking module 204 and a valve control module 205, the cut-off path checking module 204 being used to check whether a safe cut-off path in the transmission control device is clear, the valve control module 205 being used to control the shut-off of a solenoid valve in the inverter.
In the embodiment of fig. 1, the cut-off path checking module 204 may be connected to the second monitoring module 203 and configured to control the valve control module 205 to perform a valve-off self-checking procedure when the second monitoring module 203 monitors that the feedback signal from the feedback output pin INTN of the input control unit 10 is restored from a low level to a high level.
Furthermore, the execution unit 30 may comprise a memory 301, which memory 301 is provided for storing a field log relating to the current operating state of the transmission control device, an abnormal reset cause and a test result relating to a safety cut-off path in the transmission control device.
According to an alternative example, the main chip 20 is further configured to compare the supply voltage received from the first input pin with a third threshold value, which is higher than the second threshold value, and when the supply voltage received from the first input pin is higher than the third threshold value, the main chip 20 brings the transmission control device into an abnormal reset state. Wherein the execution unit 30 is further configured to record the number of abnormal resets of the transmission control device and to permanently shut off the transmission output when the abnormal resets reach a predetermined number of times (e.g. 8 times) until the transmission control device is powered up again.
The above-described transmission control apparatus according to the present invention is applicable to an automatic transmission such as AMT, AT, DCT, CVT, and the present invention also relates to an electronic control system including the transmission and the transmission control apparatus.
In increasingly popular new energy vehicles (e.g., electric and hybrid vehicles), the transmission control device of the present invention may be integrated into a domain controller assembly of the vehicle, which may also have integrated thereon an engine control device and a brake control device.
The transmission control device according to the present invention can ensure accurate start-up of the L3 security mechanism without adding extra circuit cost, and without modification of the TCU platform and its existing software code. The transmission control device not only can reasonably control the vehicle gearbox, but also can save the manufacturing cost and the calculation workload of the TCU.
It will be understood by those skilled in the art that terms such as "comprising" and "includes" and the like, in this specification, do not exclude the presence of other steps than those directly or explicitly described in the description and the claims.
While the invention has been described in terms of preferred embodiments, the invention is not limited thereto. Any person skilled in the art shall not depart from the spirit and scope of the present invention and shall accordingly fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A transmission control device comprising an input control unit (10), a main chip (20) and an execution unit (30), the input control unit (10) being connected to a vehicle power supply to receive a power supply signal therefrom, the main chip (20) being configured to control the execution unit (30) to execute a corresponding transmission control function based on an output signal of the input control unit (10),
The input control unit (10) includes:
-a power input pin (VBATIN) connected to a vehicle power supply;
-a power output pin (V5 CU, V5 REF) for outputting a respective supply voltage in dependence of a power signal received from the power input pin (VBATIN);
-a first monitoring module (101) configured to monitor whether a power supply signal from the vehicle power supply is greater than a first threshold; and
-A feedback output pin (INTN) for outputting a corresponding feedback signal according to a monitoring result of the first monitoring module (101),
The main chip (20) comprises a first input pin (VEXT, VDDM) connected to a power output pin (V5 CU, V5 REF) of the input control unit (10) and a second input pin (P33.9) connected to a feedback output pin (INTN) of the input control unit (10),
The main chip (20) is configured to compare a supply voltage received from the first input pin with a second threshold, wherein the main chip (20) causes the transmission control device to enter an abnormal reset state when the supply voltage received from the first input pin is less than the second threshold, and controls a subsequent operation of the transmission control device based on a feedback signal received from the second input pin (P33.9).
2. The transmission control device according to claim 1, wherein the main chip (20) includes a safety management module (201), a reset module (202) and a second monitoring module (203),
Wherein the security management module (201) is configured to monitor a supply voltage provided by a power output pin (V5 CU, V5 REF) of the input control unit (10) and to send a reset instruction to the reset module (202) when it is monitored that the supply voltage is less than or equal to the second threshold,
The reset module (202) is configured to store a site log relating to a current operating state of the transmission control device to the execution unit (30) upon receipt of the reset instruction, and to put the transmission control device into an abnormal reset state, and
The second monitoring module (203) is configured to monitor a feedback signal output from a feedback output pin (INTN) of the input control unit (10) and to control a subsequent operation of the transmission control device based on the feedback signal after the transmission control device enters an abnormal reset state.
3. The transmission control device according to claim 2, wherein the second monitoring module (203) is further configured to release an abnormal reset state of the transmission control device when a low level signal is monitored, so that the transmission control device continues to perform a transmission control function when a power supply voltage is restored to normal.
4. A transmission control arrangement according to claim 2 or 3, characterized in that the second monitoring module (203) is further configured to send an interrupt instruction to the execution unit (30) to control the execution unit (30) to shut off transmission output when a high level signal is detected.
5. The transmission control device according to claim 2 or 3, further comprising a cutoff path verification module (204) and a valve control module (205), the cutoff path verification module (204) being configured to verify whether a safe cutoff path in the transmission control device is clear, the valve control module (205) being configured to control the turning off of a solenoid valve in an inverter,
Wherein the cut-off path inspection module (204) is connected to the second monitoring module (203) and configured to control the valve control module (205) to perform a valve-off self-test procedure when the second monitoring module (203) monitors that a feedback signal from a feedback output pin (INTN) of the input control unit (10) is restored from a low level to a high level.
6. The transmission control device according to claim 5, characterized in that the execution unit (30) comprises a memory (301), the memory (301) being adapted to store a field log relating to the current operating state of the transmission control device, an abnormal reset cause and a test result relating to a safe cut-off path in the transmission control device.
7. A transmission control arrangement according to any one of claims 1 to 3, characterized in that the main chip (20) is further configured to compare a supply voltage received from the first input pin with a third threshold value higher than the second threshold value, wherein the main chip (20) brings the transmission control arrangement into an abnormal reset state when the supply voltage received from the first input pin is greater than the third threshold value.
8. The transmission control device of claim 7, wherein the execution unit (30) is further configured to record a number of abnormal resets of the transmission control device and permanently shut off transmission output until the transmission control device is powered up again when the abnormal resets reach a predetermined number.
9. An electronic control system, comprising:
a gearbox; and
The transmission control device according to any one of claims 1 to 8.
10. A domain controller assembly, the domain controller assembly comprising:
An engine control device;
A brake control device; and
The transmission control device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211540369.2A CN118128897A (en) | 2022-12-02 | 2022-12-02 | Transmission control device, electronic control system and domain controller assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211540369.2A CN118128897A (en) | 2022-12-02 | 2022-12-02 | Transmission control device, electronic control system and domain controller assembly |
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| Publication Number | Publication Date |
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| CN118128897A true CN118128897A (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211540369.2A Pending CN118128897A (en) | 2022-12-02 | 2022-12-02 | Transmission control device, electronic control system and domain controller assembly |
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| Country | Link |
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| CN (1) | CN118128897A (en) |
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- 2022-12-02 CN CN202211540369.2A patent/CN118128897A/en active Pending
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