High-function safety brake chip of motorcycle and power-on method of high-function safety brake chip

Abstract

According to the technical scheme, the high-function safety brake chip of the motorcycle and the power-on method of the high-function safety brake chip are at least integrated with a first power supply module, a second power supply module, a pump motor pre-drive module, an electromagnetic valve drive module and a logic control module. When the pump motor pre-driving module, the electromagnetic valve driving module and the first power supply module break down, self fault signals are transmitted to the MCU through the logic control module, so that the MCU does not need to independently collect and diagnose the respective fault signals of the pump motor pre-driving module, the electromagnetic valve driving module and the first power supply module; instead, faults are processed in the chip, and fault signals are reported to the MCU in a unified manner, so that the fault discovery time and the processing delay are remarkably shortened. The second power supply module is used for supplying power to the sensor outside the chip, and the power supply module of the sensor is integrated in the chip, so that the wiring cost and the device cost of a peripheral circuit of the chip are reduced.

Description

Technical Field

[0001] This invention relates to the field of integrated circuit technology, and in particular to a high-performance safety braking chip for motorcycles and its power-on method. Background Technology

[0002] The new generation of motorcycle ABS systems has evolved from an independent braking safety module into a comprehensive vehicle dynamics integrated controller with a closed loop of "perception-decision-execution-coordination". Its core mission is to minimize the stability risks at the vehicle's physical limits through electronic intervention without sacrificing the rider's control intentions. From January 1, 2026, three mandatory national standards for motorcycles will be officially implemented, requiring all newly manufactured motorcycles to be equipped with ABS as standard, a necessary condition for new vehicle registration. With the increased integration of ABS systems, the complexity of their electronic systems has increased, and the introduction of functional safety (ISO 26262) to ensure safety in the event of system failure represents an advanced stage of industry development.

[0003] However, in the existing technology, the power chip and the solenoid valve drive chip used in the ABS system are usually two independent chips. If the power chip or the solenoid valve drive chip fails, causing abnormal braking control, the MCU needs to collect status reporting information from the two chips respectively and determine what kind of fault has occurred, which leads to delays in fault diagnosis and processing. Summary of the Invention

[0004] The technical problem solved by this invention is how to reduce the delay in fault diagnosis and processing of high-performance safety braking chips in motorcycles.

[0005] To solve the above-mentioned technical problems, according to a first aspect of the present invention, a high-performance safety braking chip for motorcycles is provided, integrating: The first power supply module is used to convert the external input power supply into a first power supply voltage, which is used to power the off-chip MCU. The second power supply module is used to convert the external input power into a second power supply voltage, which powers the off-chip sensor. The pump motor pre-drive module is used to pre-drive the pump motor pre-drive MOS transistor outside the chip according to the second motor drive control signal group; The solenoid valve drive module is used to drive the four solenoid valves according to the second solenoid valve drive control signal group; The logic control module is used for: The second motor drive control signal group is output according to the first motor drive control signal group input by the MCU; The second solenoid valve drive control signal group is output according to the first solenoid valve drive control signal group input by the MCU. The fault signal of the first power supply module and the fault signal of the solenoid valve drive module are transmitted to the MCU, and the solenoid valve drive module is shut down according to the first shutdown control signal input by the MCU and the MCU fault signal. The fault signal of the first power supply module and the fault signal of the pump motor pre-drive module are transmitted to the MCU, and the pump motor pre-drive module is turned off according to the second shutdown control signal input by the MCU.

[0006] Optionally, the first power supply module includes a first LDO unit and a first driving power transistor; the first LDO unit converts the external input power supply into a first driving voltage and outputs it to the gate of the first driving power transistor; the drain of the first driving power transistor is connected to the external output power supply, and the source of the first driving power transistor outputs the first power supply voltage; the first driving power transistor is located outside the chip. The second power supply module includes a second LDO unit and a second driving power transistor; the first LDO unit converts the external input power into a second driving voltage and outputs it to the gate of the second driving power transistor; the drain of the second driving power transistor is connected to the external output power, and the source of the second driving power transistor outputs the second supply voltage; the first driving power transistor is disposed within the chip.

[0007] Optionally, the first supply voltage is 5V / 3.3V, and the output current corresponding to the first supply voltage is 300mA; The second power supply voltage is 5V / 3.3V, and the corresponding output current is 100mA.

[0008] Optionally, the four-way solenoid valve includes two pressure-boosting valves and two pressure-reducing valves; It also integrates a current detection module and an analog-to-digital conversion module. The current detection module collects the analog current signal flowing through the two booster valves and outputs it to the analog-to-digital conversion module. The analog-to-digital conversion module is used to convert the analog current signal into a digital current signal and output it to the logic control module. The logic control module compares the digital current signal with the set current signal value, and outputs a current adjustment command to the solenoid valve drive module based on the comparison result. The solenoid valve drive module adjusts the current flowing through the two booster valves to approach the current signal set value according to the current adjustment command.

[0009] Optionally, the solenoid valve drive module is also used to perform fault diagnosis on the drive power transistors corresponding to the two booster valves and the two pressure reducing valves, and output a fault signal of the solenoid valve drive module according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overpressure detection and short circuit detection for each of the two booster valves and the two pressure reducing valves. The pump motor pre-drive module is also used to diagnose faults in the pump motor pre-drive MOS transistor and output a fault signal of the pump motor pre-drive module according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overvoltage detection, and short circuit detection of the pump motor pre-drive MOS transistor.

[0010] Optionally, a voltage monitoring module is also integrated. The voltage monitoring module is used to monitor the first power supply voltage and the second power supply voltage, and output a fault signal of the first power supply voltage according to the fault detected in the first power supply voltage, and output a fault signal of the second power supply voltage according to the fault detected in the second power supply voltage. The logic control module is also used to shut down the solenoid valve drive module and the pump motor pre-drive module based on the fault signal of the second power supply voltage.

[0011] Optionally, the logic control module is further configured to output a first shutdown drive signal according to the third shutdown control signal input by the MCU, and output a second shutdown drive signal according to the fourth shutdown control signal input by the MCU. The logic control module is also used to directly output a third shutdown drive signal based on the fault signal of the solenoid valve drive module; and to directly output a fourth shutdown drive signal based on the fault signal of the pump motor pre-drive module. It also integrates a safety shutdown module, which cuts off the power input of the four solenoid valves according to the first shutdown drive signal or the third shutdown drive signal; and cuts off the power input of the pump motor pre-drive MOS transistor according to the second shutdown drive signal or the fourth shutdown drive signal.

[0012] Optionally, it also integrates a CAN communication interface, which is used to perform level conversion on the input first communication signal and output a second communication signal to the MCU; It also integrates a K-LINE communication interface, which is used to perform level conversion on the input third communication signal and output the fourth communication signal to the MCU; The signal transmission rate of the CAN communication interface is greater than that of the K-LINE communication interface.

[0013] Optionally, a wheel speed sensor power supply module is also integrated to power the two wheel speed sensors and convert the wheel speed information of the two wheel speed sensors into corresponding digital signals and transmit them to the MCU.

[0014] Optionally, it also integrates a fault light output module to drive the warning lights on the instrument panel; It also integrates a wheel speed output module for outputting wheel speed signals to external systems.

[0015] Optionally, a watchdog module is also integrated. The watchdog module is used to monitor the working status of the MCU and output a fifth shutdown control signal to the logic control module based on the fault signal of the MCU and the fault signal of the solenoid valve drive module. The logic control module shuts down the solenoid valve drive module according to the fifth shutdown control signal.

[0016] Optionally, it also integrates a first reference source and a second reference source; The first reference source is used to provide a voltage reference for the functional modules, which include the first power supply module, the second power supply module, the drive circuit in the solenoid valve drive module, the drive circuit in the pump motor pre-drive module, the analog-to-digital conversion module, and the current detection module. The second reference source is used to provide a voltage reference for the safety monitoring module, which includes a safety shutdown module, a voltage monitoring module, a fault detection circuit in the solenoid valve drive module, and a fault detection circuit in the pump motor pre-drive module. Both the first reference source and the second reference source are powered independently.

[0017] According to a second aspect of the present invention, a power-on method for a high-performance safety braking chip for a motorcycle is provided, characterized in that, based on the high-performance safety braking chip for a motorcycle according to the second aspect and alternative embodiments of the present invention, the power-on method includes: The internal power supply module of the high-performance safety braking chip of the motorcycle supplies power to each module within the chip after receiving an external wake-up signal and an external power supply. After the first power supply module receives the external power supply and the power supply voltage from the internal power supply module, it outputs the first power supply voltage to the MCU. The MCU outputs a first solenoid valve drive control signal group and a first motor drive control signal group to the logic control module based on the input first power supply voltage; After the logic control module is powered by the internal power supply module, it outputs the second motor drive control signal group according to the first motor drive control signal group, and also outputs the second solenoid valve drive control signal group according to the first solenoid valve drive control signal group. The pump motor pre-drive module pre-drives the external pump motor pre-drive MOS transistor according to the second motor drive control signal group; The solenoid valve drive module drives the four solenoid valves according to the second solenoid valve drive control signal group.

[0018] Optionally, during the power-on process of the braking chip, the method further includes: the logic control module outputting a first fault injection signal to the first power supply module to inject a fault into the first power supply module; and the logic control module outputting a second fault injection signal to the pump motor pre-drive module and the solenoid valve drive module to inject a fault into the pump motor pre-drive module and the solenoid valve drive module. After the first power supply module supplies power to the MCU, the system further includes: a voltage monitoring module that performs fault detection on the first power supply voltage output by the first power supply module and the second power supply voltage output by the second power supply module, and feeds back the detection results to the MCU; and the pump motor pre-drive module and the solenoid valve drive module that perform fault detection on their respective drive power transistors and feed back the detection results to the MCU.

[0019] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the first power supply module, the pump motor pre-drive module, the solenoid valve drive module, and the logic control module are all integrated into the same chip. When the pump motor pre-drive module, the solenoid valve drive module, and the first power supply module fail, they will all transmit their own fault signals to the MCU through the logic control module. Therefore, the MCU does not need to collect and diagnose the fault signals of the pump motor pre-drive module, the solenoid valve drive module, and the first power supply module separately. Instead, the fault is processed inside the chip, and the fault signals are uniformly reported to the MCU, thereby significantly shortening the fault detection time and processing delay.

[0020] In addition, the high-performance safety braking chip for motorcycles also integrates a second power supply module, which is used to power off-chip sensors. Since the power supply module for the sensors is integrated inside the chip, the wiring cost and device cost of the chip's peripheral circuits are reduced.

[0021] Furthermore, since the output current corresponding to the second power supply voltage used to power external sensors is only 100mA, the second drive power transistor inside the second power supply module can be integrated into the chip, thereby further reducing the wiring cost and device cost of the peripheral circuit board.

[0022] Furthermore, the four-way solenoid valve includes two booster valves and two pressure reducing valves. Closed-loop current regulation is achieved through a current detection module and an analog-to-digital converter module, thereby significantly improving the regulation accuracy of the current flowing through the two booster valves, and consequently improving the control accuracy of the motorcycle brakes.

[0023] Furthermore, both the solenoid valve drive module and the pump motor pre-drive module perform fault diagnosis on the power transistors they drive and output corresponding fault signals based on the diagnosis results. The voltage monitoring module monitors the first and second supply voltages and outputs corresponding fault signals based on detected faults in the first and second supply voltages. Therefore, the solenoid valve drive module, the pump motor pre-drive module, the first supply module, and the second supply module integrated within the chip all have safety diagnostic functions, and these are uniformly sent to the MCU through the logic control module, thereby greatly improving the safety of the pump motor, solenoid valve, and MCU power supply.

[0024] Furthermore, the high-performance safety braking chip of the motorcycle also integrates a safety shutdown module. When the drive power transistor corresponding to the pump motor pre-drive module or the solenoid valve drive module fails and cannot be shut down, the MCU outputs a third shutdown control signal or a fourth shutdown control signal to the logic control module, so that the logic control module outputs a first shutdown drive signal or a second shutdown drive signal to the safety shutdown module.

[0025] The safety shutdown module cuts off the power input of the four solenoid valves according to the first shutdown drive signal and cuts off the power input of the pump motor pre-drive MOS transistor according to the second shutdown drive signal, thereby realizing shutdown redundancy and further improving the safety of the system using the high-function safety braking chip for motorcycles.

[0026] Furthermore, the chip of the present invention also integrates a CAN communication interface and a K-LINE communication interface. The CAN communication interface performs level conversion on the input first communication signal and outputs a second communication signal to the MCU. The K-LINE communication interface performs level conversion on the input third communication signal and outputs a fourth communication signal to the MCU, thereby realizing data interaction between the braking chip and the external system. This not only improves the data interaction efficiency of the ABS system, but also reduces the number of chips in the ABS system and lowers the overall circuit cost of the system.

[0027] Furthermore, the braking chip of the present invention also integrates a first reference source and a second reference source. The first reference source is used to provide a voltage reference for the functional modules, which include a first power supply module, a second power supply module, a drive circuit in the solenoid valve drive module, a drive circuit in the pump motor pre-drive module, an analog-to-digital conversion module, and a current detection module. The second reference source is used to provide a voltage reference for the safety monitoring module, which includes a safety shutdown module, a voltage monitoring module, a fault detection circuit in the solenoid valve drive module, and a fault detection circuit in the pump motor pre-drive module.

[0028] Since the first reference source and the second reference source are powered independently, the common cause failure problem caused by the use of the same voltage reference source by the relevant functional modules and relevant safety diagnostic modules is eliminated. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the high-performance safety braking chip for motorcycles provided in this embodiment; Figure 2 This is a flowchart of the power-on method for the high-performance safety braking chip for motorcycles provided in this embodiment. Detailed Implementation

[0030] As described in the background art, in the prior art, the power chip and the solenoid valve drive chip used in the ABS system are usually two independent chips. If the power chip or the solenoid valve drive chip fails, resulting in abnormal braking control, the MCU needs to collect status reporting information from the two chips respectively and determine what kind of fault has occurred, which leads to delays in fault diagnosis and processing.

[0031] To address the aforementioned technical problems, the present invention provides a novel power-on method for a high-performance safety braking chip for motorcycles. This method integrates at least a first power supply module, a second power supply module, a pump motor pre-drive module, a solenoid valve drive module, and a logic control module. When the pump motor pre-drive module, the solenoid valve drive module, or the first power supply module malfunctions, they all transmit their fault signals to the MCU via the logic control module. Therefore, the MCU does not need to separately collect and diagnose the fault signals of each of the pump motor pre-drive module, the solenoid valve drive module, and the first power supply module. Instead, the fault is processed internally within the chip, and the fault signals are uniformly reported to the MCU, thereby significantly shortening the fault detection time and processing delay.

[0032] In addition, the high-performance safety braking chip for motorcycles also integrates a second power supply module, which is used to power off-chip sensors. Since the power supply module for the sensors is integrated inside the chip, the wiring cost and device cost of the chip's peripheral circuits are reduced.

[0033] To make the above-mentioned objectives, features, and beneficial effects of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. Additionally, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as they are shown in the figures, with upward or upper directions pointing towards the top of the corresponding figure and downward or lower directions pointing towards the bottom of the corresponding figure.

[0035] Please refer to Figure 1 The high-performance safety braking chip for motorcycles provided in this embodiment integrates at least a first power supply module 101, a second power supply module 102, a pump motor pre-drive module 104, a solenoid valve drive module 105, and a logic control module 103.

[0036] The first power supply module 101 is used to convert the external input power supply VBAT into a first power supply voltage Vout1, which is used to power the off-chip MCU.

[0037] In this embodiment, the first power supply module 101 includes a first LDO unit 1011 and a first driving power transistor M1. The first LDO unit 1011 converts the external input power supply VBAT into a first driving voltage Vd1 and outputs it to the gate of the first driving power transistor M1. The drain of the first driving power transistor M1 is connected to the external input power supply VBAT, and the source of the first driving power transistor M1 outputs the first power supply voltage Vout1.

[0038] Since the first power supply voltage Vout1 can be 5V or 3.3V, and the output current corresponding to the first power supply voltage Vout1 can be 300mA, that is, the current flowing through the first driving power transistor M1 can be 300mA, the first driving power transistor M1 generates a lot of heat. Therefore, the first driving power transistor M1 is placed outside the chip to avoid the heat of the first driving power transistor M1 affecting the performance of the chip.

[0039] The second power supply module 102 is used to convert the external input power supply VBAT into a second power supply voltage Vout2, which powers an off-chip sensor. Further, the sensor may include a gyroscope.

[0040] In this embodiment, the second power supply module 102 includes a second LDO unit 1021 and a second driving power transistor; the first LDO unit 1011 converts the external input power supply VBAT into a second driving voltage and outputs it to the gate of the second driving power transistor; the drain of the second driving power transistor is connected to the external input power supply VBAT, and the source of the second driving power transistor outputs the second power supply voltage Vout2.

[0041] Since the second power supply voltage Vout2 is 5V / 3.3V, the output current corresponding to the second power supply voltage Vout2 is 100mA, that is, the current flowing through the second driving power transistor can be 100mA. Therefore, the second driving power transistor generates less heat. So the first driving power transistor M1 is placed inside the chip to simplify the line cost and circuit cost of the chip's peripheral circuit.

[0042] Please continue to refer to this. Figure 1 The braking chip in this embodiment also integrates a voltage monitoring module 108. The voltage monitoring module 108 is used to monitor the first power supply voltage Vout1 and the second power supply voltage Vout2, and output a fault signal of the first power supply voltage Vout1 according to the fault detected in the first power supply voltage Vout1, and output a fault signal of the second power supply voltage Vout2 according to the fault detected in the second power supply voltage Vout2.

[0043] The pump motor pre-drive module 104 is used to pre-drive the pump motor pre-drive MOS transistor outside the chip according to the second motor drive control signal group, so as to drive the hydraulic pump motor by controlling the pump motor pre-drive MOS transistor.

[0044] In this embodiment, the pump motor pre-drive module 104 is also used to perform fault diagnosis on the pump motor pre-drive MOSFET, and output a fault signal of the pump motor pre-drive module 104 according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overvoltage detection, and open / short circuit detection of the pump motor pre-drive MOSFET. Further, the open / short circuit detection may include short circuit to ground diagnosis, short circuit to power supply diagnosis, and open circuit diagnosis.

[0045] The solenoid valve drive module 105 is used to drive the four solenoid valves according to the second solenoid valve drive control signal group.

[0046] In this embodiment, the four-way solenoid valve includes two pressure-boosting valves and two pressure-reducing valves.

[0047] Two-way booster valves typically need to operate in three states: "pressure increase," "pressure holding," and "linear pressure regulation." When the booster valve is not energized, it remains fully open to increase the pressure in the wheel cylinder. When half of the rated current is applied to the booster valve, it balances the electromagnetic force, hydraulic force, and spring force, achieving isolation between the master cylinder, wheel cylinder, and return oil, thus ensuring precise pressure maintenance. Therefore, by adjusting the current flowing through the booster valve, the valve opening can be adjusted, thereby regulating the wheel cylinder pressure and ultimately the motorcycle's braking force.

[0048] Furthermore, since motorcycle braking is very sensitive to the rate of pressure change, for example, if the pressure increases too quickly, it can easily cause the wheels to lock up, while if the pressure increases too slowly, it will increase the braking distance. Therefore, in order to achieve precise control of the wheel cylinder pressure, it is necessary to precisely adjust the current flowing through the booster valve so that the motorcycle braking can take into account both braking distance and stability.

[0049] Therefore, the high-performance safety braking chip for motorcycles in this embodiment also integrates a current detection module 106 and an analog-to-digital conversion module 107. The current detection module 106 collects the analog current signal flowing through the two booster valves and outputs it to the analog-to-digital conversion module.

[0050] The analog-to-digital conversion module 107 is used to convert the analog current signal into a digital current signal and output it to the logic control module 103.

[0051] The logic control module 103 compares the digital current signal with the current signal setpoint, and outputs a current adjustment command to the solenoid valve drive module 105 based on the comparison result. Further, the current signal setpoint represents the precise current that needs to flow through the booster valve.

[0052] The solenoid valve drive module 105 adjusts the current flowing through the two booster valves according to the current adjustment command, so as to make the current flowing through the two booster valves approach the current signal set value, thereby greatly improving the adjustment accuracy of the current flowing through the two booster valves, and thus improving the control accuracy of the motorcycle braking.

[0053] Since the function of the two-way pressure-reducing valves is to quickly release pressure to prevent wheel lock-up, these valves typically only need to be kept in two states: fully open and fully closed, without the need for fine-tuning their on / off state. Therefore, in this embodiment, the two-way pressure-reducing valves are controlled by PWM for on / off switching.

[0054] The solenoid valve drive module 105 is also used to perform fault diagnosis on the drive power transistors corresponding to the two booster valves and the two pressure reducing valves, and output a fault signal of the solenoid valve drive module 105 according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overvoltage detection, and short circuit detection for each of the two booster valves and the two pressure reducing valves. Further, the short circuit detection can include short circuit to ground diagnosis, short circuit to power supply diagnosis, and open circuit diagnosis.

[0055] Please continue to refer to this. Figure 1 In this embodiment, the braking chip also integrates a wheel speed sensor power supply module 112. The wheel speed sensor power supply module 112 is used to supply power to two wheel speed sensors, and converts the wheel speed information of the two wheel speed sensors into corresponding digital signals, which are then transmitted to the MCU.

[0056] Specifically, the first wheel speed information collected by the wheel speed sensor corresponding to the front wheel of the motorcycle is converted into a first digital signal by the wheel speed sensing power supply module 112 and transmitted to the MCU. The second wheel speed information collected by the wheel speed sensor corresponding to the rear wheel of the motorcycle is also converted into a second digital signal by the wheel speed sensing power supply module 112 and transmitted to the MCU.

[0057] The MCU obtains the front wheel speed information and rear wheel speed information of the motorcycle based on the received first and second digital signals, and controls the motorcycle's braking according to the obtained front wheel speed information and rear wheel speed information. Therefore, the MCU outputs the first motor drive control signal group and the first solenoid valve drive control signal group to the logic control module 103.

[0058] The logic control module 103 outputs the second motor drive control signal group to the pump motor pre-drive module 104 according to the input first motor drive control signal group, so that the pump motor pre-drive module 104 pre-drives the pump motor pre-drive MOS transistor outside the chip.

[0059] The logic control module 103 also outputs a second solenoid valve drive control signal group to the solenoid valve drive module 105 according to the input first solenoid valve drive control signal group, so that the solenoid valve drive module 105 drives the four solenoid valves.

[0060] In addition to normal braking control, the logic control module 103 is also used to transmit the fault signal of the first power supply module 101 and the fault signal of the solenoid valve drive module 105 to the MCU. The MCU outputs a first shutdown control signal to the logic control module 103 based on the received fault signals of the first power supply module 101 and the solenoid valve drive module 105, so that the logic control module 103 shuts down the solenoid valve drive module 105.

[0061] The logic control module 103 is further configured to transmit the fault signal of the first power supply module 101 and the fault signal of the pump motor pre-drive module 104 to the MCU. The MCU outputs a second shutdown control signal to the logic control module 103 based on the received fault signals of the first power supply module 101 and the pump motor pre-drive module 104, thereby causing the logic control module 103 to shut down the pump motor pre-drive module 104.

[0062] Of course, in addition to shutting down the corresponding solenoid valve drive module 105 or pump motor pre-drive module according to the first shutdown control signal or the second shutdown control signal, the logic control module 103 can also directly shut down the pump motor pre-drive module 104 or solenoid valve drive module 105 according to the received fault signal of the first power supply module 101, the fault signal of the pump motor pre-drive module 104 or the fault signal of the solenoid valve drive module 105, which is not limited here.

[0063] It should be noted that since the first power supply module 101 needs to continuously supply power to the MCU, if the first power supply module 101 fails, the entire ABS system of the motorcycle will not function properly. Therefore, the safety level of the first power supply module 101 is higher than that of the solenoid valve drive module 105 and the pump motor pre-drive module 104. Therefore, when the first power supply module 101 fails, both the solenoid valve drive module 105 and the pump motor pre-drive module 104 need to be shut down. However, if the drive power transistor corresponding to the solenoid valve drive module 105 or the pump motor pre-drive module 104 fails, only the module corresponding to the failed power transistor needs to be shut down.

[0064] In addition, the voltage monitoring module 108 also monitors the second power supply voltage Vout2 to determine whether the second power supply voltage Vout2 has overvoltage or undervoltage faults.

[0065] Therefore, the solenoid valve drive module 105, the pump motor pre-drive module 104, the first power supply module 101, and the second power supply module 102 integrated in the chip all have safety diagnostic functions, and are uniformly sent to the MCU through the logic control module 103, thereby greatly improving the safety of the pump motor, solenoid valve, and MCU power supply.

[0066] When the solenoid valve drive module 105 malfunctions and cannot be shut down, the logic control module 103 outputs a first shutdown drive signal based on the third shutdown control signal input by the MCU, or the logic control module 103 directly outputs a third shutdown drive signal based on the fault signal of the solenoid valve drive module 105.

[0067] When the pump motor pre-drive module 104 fails and cannot be shut down, the logic control module 103 outputs a second shutdown drive signal according to the fourth shutdown control signal input by the MCU, or the logic control module 103 directly outputs a fourth shutdown drive signal according to the fault signal of the pump motor pre-drive module 104.

[0068] Please continue to refer to this. Figure 1 The braking chip provided in this embodiment also integrates a safety shutdown module 109. The safety shutdown module 109 cuts off the power input to the four solenoid valves according to the first shutdown drive signal or the third shutdown drive signal. The safety shutdown module 109 also cuts off the power input to the pump motor pre-drive MOS transistor according to the second shutdown drive signal or the fourth shutdown drive signal. Therefore, the safety shutdown module 109 achieves shutdown redundancy, thereby further improving the safety of the system using the high-performance safety braking chip for motorcycles.

[0069] Please continue to refer to this. Figure 1 In this embodiment, the specific scheme for cutting off the four solenoid valves is as follows: a power switch NMOS transistor M3 is disposed outside the chip. The drain of the power switch NMOS transistor M3 is connected to the external input power supply VBAT through a diode. The source of the power switch NMOS transistor M3 is connected to the power supply terminals of two pressure reducing valves and two pressure boosting valves, respectively. The gate, drain, and source of the power switch NMOS transistor M3 are all connected to the safety shutdown module 109 inside the chip through resistors.

[0070] If the first shutdown drive signal or the third shutdown drive signal is not received, the safety shutdown module 109 outputs a high level to the gate of the power switch NMOS transistor M3 to turn on the power switch NMOS transistor M3, thereby ensuring that the external input power supply VBAT supplies normal power to the two pressure reducing valves and the two pressure boosting valves.

[0071] If the first shutdown drive signal or the third shutdown drive signal is received, the safety shutdown module 109 outputs a low level to the gate of the power switch NMOS transistor M3 to turn off the power switch NMOS transistor M3, thereby cutting off the power supply of the external input power supply VBAT to the two pressure reducing valves and the two pressure boosting valves.

[0072] Please continue to refer to this. Figure 1 In this embodiment, the high-performance safety braking chip for motorcycles also integrates a fault light output module 114 and a wheel speed output module 115. The fault light output module 114 is used to drive the warning lights on the instrument panel. The wheel speed output module 115 is used to output wheel speed signals to the outside of the system.

[0073] Please continue to refer to this. Figure 1In this embodiment, the high-performance safety braking chip for motorcycles also integrates a watchdog module 113. The watchdog module 113 is used to monitor the working status of the MCU and output a fifth shutdown control signal to the logic control module 103 based on the fault signal of the MCU and the fault signal of the solenoid valve drive module 105.

[0074] The logic control module 103 is also used to shut down the solenoid valve drive module 105 according to the fifth shutdown control signal.

[0075] Since this application integrates the first power supply module 101, the pump motor pre-drive module 104, and the solenoid valve drive module 105 into the same chip, the watchdog module 113 can uniformly detect MCU faults, thereby significantly shortening the total delay time for detecting MCU faults.

[0076] In this embodiment, the watchdog module 113 sets two monitoring methods for the MCU, including a time window mode and a question-and-answer mode. The time window mode is used to monitor the MCU's communication latency. The question-and-answer mode, combined with the time window, monitors the MCU's communication functions as well as whether the MCU's internal logic and clock are normal, thereby enhancing the monitoring of MCU communication.

[0077] Please continue to refer to this. Figure 1 The braking chip provided in this embodiment also integrates an internal analog power supply module 117 and an internal digital power supply module 116. The internal analog power supply module 117 is used to supply power to the analog circuits within the chip. The internal digital power supply module 116 is used to supply power to the digital circuits within the chip.

[0078] Please continue to refer to this. Figure 1 The braking chip provided in this embodiment also integrates a first reference source 118 and a second reference source 119.

[0079] The first reference source 118 is used to provide a voltage reference for the functional module.

[0080] The functional modules include the first power supply module 101, the second power supply module 102, the drive circuit in the solenoid valve drive module 105, the drive circuit in the pump motor pre-drive module 104, the analog-to-digital conversion module 107, the current detection module 106, the fault light output module 114, and the wheel speed output module 115.

[0081] The second reference source 119 is used to provide a voltage reference for the safety monitoring module.

[0082] The safety monitoring module includes a safety shutdown module 109, a voltage monitoring module 108, a fault detection circuit in the solenoid valve drive module 105, and a fault detection circuit in the pump motor pre-drive module 104.

[0083] Since the first reference source 118 and the second reference source 119 are powered independently, the common cause failure problem caused by the use of the same voltage reference source by the relevant functional modules and relevant safety diagnostic modules is eliminated.

[0084] Please continue to refer to this. Figure 1 The chip of the present invention also integrates a CAN communication interface 110 and a K-LINE communication interface 111. The CAN communication interface 110 converts the level of the input first communication signal and outputs a second communication signal to the MCU. The K-LINE communication interface 111 converts the level of the input third communication signal and outputs a fourth communication signal to the MCU, thereby realizing data interaction between the braking chip and the external system. This not only improves the data interaction efficiency of the ABS system, but also reduces the number of chips in the ABS system and reduces the overall circuit cost of the system.

[0085] Please refer to Figure 2 Based on the aforementioned high-performance safety braking chip for motorcycles, this embodiment also provides a power-on method for the high-performance safety braking chip for motorcycles, which specifically includes the following steps: S100: The internal power supply module of the high-function safety braking chip of the motorcycle supplies power to each module in the chip after receiving an external wake-up signal and an external power supply VBAT.

[0086] S200: After the first power supply module 101 is input with the external input power supply VBAT and the power supply voltage of the internal power supply module, it outputs the first power supply voltage Vout1 to the MCU.

[0087] S300: The MCU outputs a first solenoid valve drive control signal group and a first motor drive control signal group to the logic control module 103 according to the input first power supply voltage Vout1.

[0088] S400: After the logic control module 103 is powered by the internal power supply module, it outputs the second motor drive control signal group according to the first motor drive control signal group, and also outputs the second solenoid valve drive control signal group according to the first solenoid valve drive control signal group.

[0089] S500: Pump motor pre-drive module 104 pre-drives the external pump motor pre-drive MOS transistor according to the second motor drive control signal group.

[0090] S600: The solenoid valve drive module 105 drives the four solenoid valves according to the second solenoid valve drive control signal group.

[0091] The power-on method for the high-performance safety braking chip for motorcycles provided in this embodiment first wakes up the internal power supply module within the chip to supply power to the various modules within the chip. Then, the first power supply module 101 is powered on, causing it to output a first supply voltage Vout1 to the MCU to power the MCU. After the MCU receives power, it outputs a first solenoid valve drive control signal group and a first motor drive control signal group to drive the solenoid valve drive module 105 and the pump motor pre-drive module 104 to operate normally. This ensures that the solenoid valve drive module 105 and the pump motor pre-drive module 104 start working only after the MCU has started, thereby ensuring the chip's power-on safety.

[0092] It should be added that the wake-up method of the chip includes sending a wake-up signal to the CAN communication interface 110 inside the chip or directly inputting an ignition start signal to the chip, which is not limited here.

[0093] During the power-on process of the braking chip, the logic control module also outputs a first fault injection signal to the first power supply module 101, the second power supply module 102, and the internal analog and digital power supply modules of the chip to perform fault injection detection on the power supply modules.

[0094] The logic control module 103 also outputs a second fault injection signal to the pump motor pre-drive module 104 and the solenoid valve drive module 105 to perform fault injection detection on the pump motor pre-drive module 104 and the solenoid valve drive module 105.

[0095] After the first power supply module 101 supplies power to the MCU, the logic control module also includes: feeding back the fault detection results of the first power supply module 101 and the second power supply module 102 to the MCU, thereby realizing the safety self-test of the first power supply module 101.

[0096] The pump motor pre-drive module 104 and the solenoid valve drive module 105 perform fault detection on their respective drive power transistors and feed the detection results back to the MCU, thereby realizing the safety self-test of the pump motor pre-drive module 104 and the solenoid valve drive module 105.

[0097] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A high-performance safety braking chip for motorcycles, characterized in that, Integrated with: The first power supply module is used to convert the external input power supply into a first power supply voltage, which is used to power the off-chip MCU. The second power supply module is used to convert the external input power into a second power supply voltage, which powers the off-chip sensor. The pump motor pre-drive module is used to pre-drive the pump motor pre-drive MOS transistor outside the chip according to the second motor drive control signal group; The solenoid valve drive module is used to drive the four solenoid valves according to the second solenoid valve drive control signal group; The logic control module is used for: The second motor drive control signal group is output according to the first motor drive control signal group input by the MCU; The second solenoid valve drive control signal group is output according to the first solenoid valve drive control signal group input by the MCU. The fault signal of the first power supply module and the fault signal of the solenoid valve drive module are transmitted to the MCU, and the solenoid valve drive module is shut down according to the first shutdown control signal input by the MCU and the MCU fault signal. The fault signal of the first power supply module and the fault signal of the pump motor pre-drive module are transmitted to the MCU, and the pump motor pre-drive module is turned off according to the second shutdown control signal input by the MCU.

2. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, The first power supply module includes a first LDO unit and a first driving power transistor; the first LDO unit converts the external input power into a first driving voltage and outputs it to the gate of the first driving power transistor; The drain of the first driving power transistor is connected to the external output power supply, and the source of the first driving power transistor outputs the first supply voltage. The first driving power transistor is located outside the chip. The second power supply module includes a second LDO unit and a second drive power transistor; The first LDO unit converts the external input power supply into the second drive voltage and outputs it to the gate of the second drive power transistor; The drain of the second driving power transistor is connected to the external output power supply, and the source of the second driving power transistor outputs the second supply voltage. The first driving power transistor is located inside the chip.

3. The high-performance safety braking chip for motorcycles according to claim 2, characterized in that, The first supply voltage is 5V / 3.3V, and the corresponding output current is 300mA. The second power supply voltage is 5V / 3.3V, and the corresponding output current is 100mA.

4. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, The four-way solenoid valve includes two pressure-boosting valves and two pressure-reducing valves; It also integrates a current detection module and an analog-to-digital conversion module. The current detection module collects the analog current signal flowing through the two booster valves and outputs it to the analog-to-digital conversion module. The analog-to-digital conversion module is used to convert the analog current signal into a digital current signal and output it to the logic control module. The logic control module compares the digital current signal with the set current signal value, and outputs a current adjustment command to the solenoid valve drive module based on the comparison result. The solenoid valve drive module adjusts the current flowing through the two booster valves to approach the current signal set value according to the current adjustment command.

5. The high-performance safety braking chip for motorcycles according to claim 4, characterized in that, The solenoid valve drive module is also used to perform fault diagnosis on the drive power transistors corresponding to the two booster valves and the two pressure reducing valves, and output the fault signal of the solenoid valve drive module according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overpressure detection and short circuit detection for each of the two booster valves and the two pressure reducing valves. The pump motor pre-drive module is also used to diagnose faults in the pump motor pre-drive MOS transistor and output a fault signal of the pump motor pre-drive module according to the diagnosed fault. The fault diagnosis includes at least overcurrent detection, overtemperature detection, overvoltage detection, and short circuit detection of the pump motor pre-drive MOS transistor.

6. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, It also integrates a voltage monitoring module, which is used to monitor the first power supply voltage and the second power supply voltage, and output a fault signal of the first power supply voltage according to the fault detected in the first power supply voltage, and output a fault signal of the second power supply voltage according to the fault detected in the second power supply voltage. The logic control module is also used to shut down the solenoid valve drive module and the pump motor pre-drive module based on the fault signal of the second power supply voltage.

7. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, The logic control module is also used to output a first shutdown drive signal according to the third shutdown control signal input by the MCU, and to output a second shutdown drive signal according to the fourth shutdown control signal input by the MCU. The logic control module is also used to directly output a third shutdown drive signal based on the fault signal of the solenoid valve drive module; and to directly output a fourth shutdown drive signal based on the fault signal of the pump motor pre-drive module. It also integrates a safety shutdown module, which cuts off the power input of the four solenoid valves according to the first shutdown drive signal or the third shutdown drive signal; and cuts off the power input of the pump motor pre-drive MOS transistor according to the second shutdown drive signal or the fourth shutdown drive signal.

8. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, It also integrates a CAN communication interface, which is used to convert the level of the first input communication signal and output the second communication signal to the MCU; It also integrates a K-LINE communication interface, which is used to perform level conversion on the input third communication signal and output the fourth communication signal to the MCU; The signal transmission rate of the CAN communication interface is greater than that of the K-LINE communication interface.

9. The high-performance safety braking chip for motorcycles according to claim 8, characterized in that, It also integrates a wheel speed sensor power supply module, which is used to power the two wheel speed sensors and convert the wheel speed information of the two wheel speed sensors into corresponding digital signals and transmit them to the MCU.

10. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, It also integrates a fault light output module to drive the warning lights on the dashboard; It also integrates a wheel speed output module for outputting wheel speed signals to external systems.

11. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, It also integrates a watchdog module, which is used to monitor the working status of the MCU and output a fifth shutdown control signal to the logic control module based on the fault signal of the MCU and the fault signal of the solenoid valve drive module. The logic control module shuts down the solenoid valve drive module according to the fifth shutdown control signal.

12. The high-performance safety braking chip for motorcycles according to claim 1, characterized in that, It also integrates a first reference source and a second reference source; The first reference source is used to provide a voltage reference for the functional modules, which include the first power supply module, the second power supply module, the drive circuit in the solenoid valve drive module, the drive circuit in the pump motor pre-drive module, the analog-to-digital conversion module, and the current detection module. The second reference source is used to provide a voltage reference for the safety monitoring module, which includes a safety shutdown module, a voltage monitoring module, a fault detection circuit in the solenoid valve drive module, and a fault detection circuit in the pump motor pre-drive module. Both the first reference source and the second reference source are powered independently.

13. A method for powering on a high-performance safety braking chip for a motorcycle, characterized in that, Based on the high-performance safety braking chip for motorcycles according to any one of claims 1 to 12, the power-on method includes: The internal power supply module of the high-performance safety braking chip of the motorcycle supplies power to each module within the chip after receiving an external wake-up signal and an external power supply. After the first power supply module receives the external power supply and the power supply voltage from the internal power supply module, it outputs the first power supply voltage to the MCU. The MCU outputs a first solenoid valve drive control signal group and a first motor drive control signal group to the logic control module based on the input first power supply voltage; After the logic control module is powered by the internal power supply module, it outputs the second motor drive control signal group according to the first motor drive control signal group, and also outputs the second solenoid valve drive control signal group according to the first solenoid valve drive control signal group. The pump motor pre-drive module pre-drives the external pump motor pre-drive MOS transistor according to the second motor drive control signal group; The solenoid valve drive module drives the four solenoid valves according to the second solenoid valve drive control signal group.

14. The power-on method according to claim 13, characterized in that, During the power-on process of the braking chip, the following steps are also included: the logic control module outputs a first fault injection signal to the first power supply module and the second power supply module to inject faults into the first power supply module and the second power supply module; the logic control module also outputs a second fault injection signal to the pump motor pre-drive module and the solenoid valve drive module to inject faults into the pump motor pre-drive module and the solenoid valve drive module. After the first power supply module supplies power to the MCU, the system further includes: a voltage monitoring module that performs fault detection on the first power supply voltage output by the first power supply module and the second power supply voltage output by the second power supply module, and feeds back the detection results to the MCU; and the pump motor pre-drive module and the solenoid valve drive module that perform fault detection on their respective drive power transistors and feed back the detection results to the MCU.

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